Gamma linolenic acid (gla) Health Dictionary

Gamma Linolenic Acid (gla): From 1 Different Sources


A polyunsaturated fatty acid; an essential ingredient in the body’s production of prostaglandins. Present naturally in mother’s milk. The body produces GLA from linoleic acid present in food as an essential fatty acid (EFA). Vital to growth, cell structure and cardiac health. Sources: Evening Primrose oil; Sunflower seed oil, Borage and Blackcurrant. Preparations from the fermentation of rotten carrots. Helps lower blood pressure and prevent cholesterol build-up in the blood. 
Health Source: Bartrams Encyclopedia of Herbal Medicine
Author: Health Encyclopedia

Glaucoma

Increased intraocular pressure and its consequences... glaucoma

Adrenal Glands

Also known as suprarenal glands, these are two small triangular ENDOCRINE GLANDS situated one upon the upper end of each kidney. (See diagram of ABDOMEN.)

Structure Each suprarenal gland has an enveloping layer of ?brous tissue. Within this, the gland shows two distinct parts: an outer, ?rm, deep-yellow cortical (see CORTEX) layer, and a central, soft, dark-brown medullary (see MEDULLA) portion. The cortical part consists of columns of cells running from the surface inwards, whilst in the medullary portion the cells are arranged irregularly and separated from one another by large capillary blood vessels.

Functions Removal of the suprarenal glands in animals is speedily followed by great muscular prostration and death within a few days. In human beings, disease of the suprarenal glands usually causes ADDISON’S DISEASE, in which the chief symptoms are increasing weakness and bronzing of the skin. The medulla of the glands produces a substance – ADRENALINE – the effects of which closely resemble those brought about by activity of the SYMPATHETIC NERVOUS SYSTEM: dilated pupils, hair standing on end, quickening and strengthening of the heartbeat, immobilisation of the gut, increased output of sugar from the liver into the bloodstream. Several hormones (called CORTICOSTEROIDS) are produced in the cortex of the gland and play a vital role in the metabolism of the body. Some (such as aldosterone) control the electrolyte balance of the body and help to maintain the blood pressure and blood volume. Others are concerned in carbohydrate metabolism, whilst others again are concerned with sex physiology. HYDROCORTISONE is the most important hormone of the adrenal cortex, controlling as it does the body’s use of carbohydrates, fats and proteins. It also helps to suppress in?ammatory reactions and has an in?uence on the immune system.... adrenal glands

Glandular Fever

See MONONUCLEOSIS.... glandular fever

Hydrochloric Acid

A colourless, pungent, fuming liquid. Secreted by the parietal cells in the lining of the stomach, it aids in the digestion of the food.... hydrochloric acid

Uric Acid

The final end product of certain native or dietary proteins, especially the nucleoproteins found in the nucleus of cells. Unlike the much smaller nitrogenous waste product urea, which is mostly recycled to form many amino acids, uric acid is an unrecyclable metabolite. It is a bent nail that won’t restraighten, and it must be excreted: nucleoprotein to purine to uric acid to the outside in the urine or the sweat. (See GOUT, PURINES.)... uric acid

Ascorbic Acid

Ascorbic acid, or vitamin C (see APPENDIX 5: VITAMINS), is a simple sugar found in living tissues – its highest concentrations being in the adrenal cortex (see ADRENAL GLANDS) and the eye. Stress and CORTICOTROPIN lead to a loss of ascorbic acid from the adrenal cortex. Fresh fruit and vegetables, particularly blackcurrants, citrus fruits, berries and green vegetables, are the richest dietary sources; it may also be synthetically prepared. Ascorbic acid is easily eliminated from the diet by traditional methods of cooking, being very soluble in water and easily destroyed by heat, alkalis, traces of copper or by an oxidase released by damage to plant tissues. De?ciency may lead to SCURVY, traditionally associated with sailors, among elderly people living alone or in poor communities living at subsistence level. It has been claimed that large doses (1–2 g daily) will prevent the common cold, but few large controlled trials have been carried out and it is inadvisable for people to dose themselves with large quantities of ascorbic acid, which may result in the formation of oxalate stones in the urinary tract. (See also VITAMIN.)... ascorbic acid

Deoxyribonucleic Acid

See DNA.... deoxyribonucleic acid

Exocrine Gland

A gland that secretes its products through a duct to the surface of the body or of an organ. The sweat glands in the skin and the salivary glands in the mouth are examples. The secretion is set o? by a hormone (see HORMONES) or a NEUROTRANSMITTER.... exocrine gland

Folic Acid

One of the constituents of the vitamin B complex, folic acid derives its name from the fact that it is found in many green leaves, including spinach and grass. It has also been obtained from liver, kidney and yeasts. It has proved to be of value in the treatment of macrocytic anaemias (see ANAEMIA), particularly those associated with SPRUE and nutritional de?ciencies.

In order to prevent NEURAL TUBE defects and cleft lip or palate (see CLEFT PALATE), all women planning to become pregnant should be advised to have a diet rich in folic acid in the months before conception until 13 weeks’ gestation, or to take folic acid tablets.

Recent research has suggested that adequate levels of folic acid can prevent the build-up of homocysteine, a compound in the blood closely associated with heart attacks and strokes. It has been suggested that the o?cial recommendation of 200 micrograms a day in the diet should be doubled. (See APPENDIX 5: VITAMINS.)... folic acid

Fusidic Acid

A valuable antistaphylococcal antibiotic used both orally and topically. It is particularly useful in osteomyelitis (see BONE, DISORDERS OF).... fusidic acid

Glans

The term applied to the ends of the PENIS and the CLITORIS. In the penis the glans is the distal, helmet-shaped part that is formed by the bulbous corpus spongiosum (erectile tissue). In an uncircumcised man the glans is covered by the foreskin or PREPUCE when the penis is ?accid.... glans

Lactic Acid

A colourless, syrupy, sour liquid, which is produced by the action of a bacterium upon lactose, the sugar found in milk. The growth of this organism and consequent formation of lactic acid cause the souring of milk, and the same change takes place to a limited extent when food is long retained in the stomach.

Lactic acid (CH3.CHOH.COOH) is produced in the body during muscular activity, the lactic acid being derived from the breakdown of GLYCOGEN. Muscle fatigue is associated with an accumulation of lactic acid in the muscle. Recovery follows when enough oxygen gets to the muscle, part of the lactic acid being oxidised and most of it then being built up once more into glycogen.... lactic acid

Mammary Gland

See BREASTS.... mammary gland

Mefenamic Acid

One of the NON-STEROIDAL ANTIINFLAMMATORY DRUGS (NSAIDS) that is an analgesic (see ANALGESICS) for mild to moderate pain in RHEUMATOID ARTHRITIS, OSTEOARTHRITIS and other musculoskeletal disorders. Also used for DYSMENNORRHOEA and MENORRHAGIA. It must be used with care as it has several side-effects, in particular diarrhoea and occasional haemolytic ANAEMIA. It must not be used in patients with INFLAMMATORY BOWEL DISEASE (IBD).... mefenamic acid

Nalidixic Acid

An antibiotic drug, active against gram-negative (see GRAM’S STAIN) micro-organisms, used to treat and prevent infections of the URINARY TRACT.... nalidixic acid

Nicotinic Acid

Nicotinic acid is a member of the vitamin B complex. It is essential for human nutrition, the normal daily requirement for an adult being about 15–20 mg. A de?ciency of nicotinic acid is one of the factors in the etiology of PELLAGRA, and either nicotine acid or NICOTINAMIDE is used in the treatment of this condition. Nicotinic acid also reduces the concentration of blood lipids (see HYPERLIPIDAEMIA).... nicotinic acid

Nucleic Acid

Group of chemicals found in cells and which carry biochemical codes for heredity and day-to-dayfunctioning of cells.... nucleic acid

Oxalic Acid

This is an irritant poison that is used domestically for cleaning purposes. It is also found in many plants including rhubarb and sorrel. Oxalic acid, when swallowed, produces burning of the mouth and throat, vomiting of blood, breathlessness and circulatory collapse. Calcium salts, lime water or milk should be given by mouth. An injection of calcium gluconate is an antidote.... oxalic acid

Pantothenic Acid

This plays an important part in the transfer of acetyl groups in the body’s METABOLISM and is one of the essential constituents of the diet. The daily requirement is probably around 10 milligrams. It is widely distributed in food stu?s, both animal and vegetable; yeast, liver and egg-yolk are particularly rich sources. (See APPENDIX

5: VITAMINS.)... pantothenic acid

Prostate Gland

This is an accessory sex gland in males which is wrapped round the URETHRA as this tube leaves the URINARY BLADDER. Opening into the urethra, the gland secretes an alkaline ?uid during ejaculation and is a constituent of SEMEN. The gland grows during adolescence and is sensitive to the concentrations of sex hormones.... prostate gland

Salicylic Acid

A crystalline substance sparingly soluble in water that is used externally in ointments and pastes. It has antifungal properties and helps to loosen and remove scales. In high concentrations it is useful in treatment of verrucae (WARTS) and corns (see CORNS AND BUNIONS).... salicylic acid

Salivary Glands

The glands that produce the saliva injected when a mosquito or other ectoparasite bites, which prevent blood from clotting while the mosquito feeds.... salivary glands

Pituitary Gland

Also known as the pituitary body and the hypophysis, this is an ovoid structure, weighing around 0·5 gram in the adult. It is attached to the base of the BRAIN, and lies in the depression in the base of the skull known as the sella turcica. The anterior part is called the adenohypophysis and the posterior part the neurohy-P pophysis. The gland is connected to the HYPOTHALAMUS of the brain by a stalk known as the hypophyseal or pituitary stalk.

The pituitary gland is the most important ductless, or endocrine, gland in the body. (See

ENDOCRINE GLANDS.) It exerts overall control of the endocrine system through the media of a series of hormones which it produces. The adenohypophysis produces trophic hormones (that is, they work by stimulating or inhibiting other endocrine glands) and have therefore been given names ending with ‘trophic’ or ‘trophin’. The thyrotrophic hormone, or thyroid-stimulating hormone (TSH), exerts a powerful in?uence over the activity of the THYROID GLAND. The ADRENOCORTICOTROPHIC HORMONE (ACTH) stimulates the cortex of the adrenal glands. GROWTH HORMONE, also known as somatotrophin (SMH), controls the growth of the body. There are also two gonadotrophic hormones which play a vital part in the control of the gonads: these are the follicle-stimulating hormone (FSH), and the luteinising hormone (LH) which is also known as the interstitial-cell-stimulating hormone (ICSH) – see GONADOTROPHINS. The lactogenic hormone, also known as prolactin, mammotrophin and luteotrophin, induces lactation.

The neurohypophysis produces two hormones. One is oxytocin, which is widely used because of its stimulating e?ect on contraction of the UTERUS. The other is VASOPRESSIN, or the antidiuretic hormone (ADH), which acts on the renal tubules and the collecting tubules (see KIDNEYS) to increase the amount of water that they normally absorb.... pituitary gland

Suprarenal Glands

See ADRENAL GLANDS.... suprarenal glands

Tranexamic Acid

A drug used in the control of bleeding. It inhibits the activation of PLASMINOGEN and FIBRINOLYSIS, and may be useful when bleeding cannot be stopped – for instance, dental extraction in HAEMOPHILIA. The drug is also useful in MENORRHAGIA.... tranexamic acid

Thyroid Gland

A highly vascular organ situated in front of the neck. It consists of a narrow isthmus crossing the windpipe close to its upper end, and joining together two lateral lobes which run upwards, one on each side of the LARYNX. The gland is therefore shaped somewhat like a horseshoe, each lateral lobe being about 5 cm (2 inches) long and the isthmus about 12 mm (••• inch) wide, and it is ?rmly bound to the larynx. The weight of the thyroid gland is about 28·5 grams (1 ounce), but it is larger in females than in males and in some women increases in size during MENSTRUATION. It often reaches an enormous size in the condition known as GOITRE (see also THYROID GLAND, DISEASES OF).

Function The chief function of the thyroid gland is to produce a hormone (see HORMONES) rich in iodine – THYROXINE, which controls the rate of body METABOLISM. Thus, if it is de?cient in infants they fail to grow and suffer LEARNING DISABILITY, a condition formerly known as CRETINISM. If the de?ciency develops in adult life, the individual becomes obese, lethargic, and develops a coarse skin, a condition known as hypothyroidism (see under THYROID GLAND, DISEASES OF). Overactivity of the thyroid, or hyperthyroidism, results in loss of weight, rapid heart action, anxiety, overactivity and increased appetite. (See THYROID GLAND, DISEASES OF – Thyrotoxicosis.)

The production of the thyroid hormone is controlled by a hormone of the PITUITARY GLAND – the thyrotrophic hormone.... thyroid gland

Ursodeoxycholic Acid

A preparation used in the treatment of cholesterol gall-stones when laparoscopic CHOLECYSTECTOMY and endoscopic biliary procedures cannot be used (see GALL-BLADDER, DISEASES OF).... ursodeoxycholic acid

Parathyroid Glands

Glands that control the level of calcium in the blood. The four glands appear, two on each side, implanted in the thyroid gland in the front of the neck.

Disorders are (1) hypoparathyroidism and (2) hyperparathyroidism. See entries. ... parathyroid glands

Acetoacetic Acid

An organic acid produced by the LIVER when it is rapidly oxidising fatty acids – a metabolic process which occurs, for example, during starvation. The acid produced is then converted to ACETONE, which is excreted.... acetoacetic acid

Acid

In our context, a substance having a pH below that of neutral water (7.0) when in solution. Most metabolic waste products are acidic. Sour. See pH... acid

Acid Base Balance

The balance between the acid and alkaline elements present in the blood and body ?uids.

The normal hydrogen ion concentration of the PLASMA is a constant pH 7·4, and the lungs and kidneys have a crucial function in maintaining this ?gure. Changes in pH value will cause ACIDOSIS or ALKALOSIS.... acid base balance

Carbolic Acid

Carbolic acid, or phenol, was the precursor of all ANTISEPTICS. It paralyses and then destroys most forms of life, particularly organisms such as bacteria. It has been superseded by less penetrative and harmful antiseptics.... carbolic acid

Chenodeoxycholic Acid

One of the bile acids (see BILE), used in the treatment of cholesterol gall-stones for patients with mild symptoms when other modern techniques are unsuitable. (See GALL-BLADDER, DISEASES OF.)... chenodeoxycholic acid

Citric Acid

This is responsible for the sharp taste associated with citrus fruits, such as lemons and limes, and other fruits such as currants and raspberries. Although chemically di?erent from, it is similar in action and appearance to tartaric acid, obtained from grapes and other fruits, and similar to malic acid, found in apples and pears.... citric acid

Ductless Gland

Any one of certain glands in the body the secretion of which goes directly into the bloodstream and so is carried to di?erent parts of the body. These glands – the pituitary, thyroid, parathyroid, adrenal and reproductive – are also known as the ENDOCRINE GLANDS. Some glands may be both duct glands and ductless glands. For example, the PANCREAS manufactures a digestive juice which passes by a duct into the small intestine. It also manufactures, by means of special cells, a substance called INSULIN which passes straight into the blood.... ductless gland

Endocrine Glands

Organs whose function it is to secrete into the blood or lymph, substances known as HORMONES. These play an important part in general changes to or the activities of other organs at a distance. Various diseases arise as the result of defects or excess in the internal secretions of the di?erent glands. The chief endocrine glands are:

Adrenal glands These two glands, also known as suprarenal glands, lie immediately above the kidneys. The central or medullary portion of the glands forms the secretions known as ADRENALINE (or epinephrine) and NORADRENALINE. Adrenaline acts upon structures innervated by sympathetic nerves. Brie?y, the blood vessels of the skin and of the abdominal viscera (except the intestines) are constricted, and at the same time the arteries of the muscles and the coronary arteries are dilated; systolic blood pressure rises; blood sugar increases; the metabolic rate rises; muscle fatigue is diminished. The super?cial or cortical part of the glands produces steroid-based substances such as aldosterone, cortisone, hydrocortisone, and deoxycortone acetate, for the maintenance of life. It is the absence of these substances, due to atrophy or destruction of the suprarenal cortex, that is responsible for the condition known as ADDISON’S DISEASE. (See CORTICOSTEROIDS.)

Ovaries and testicles The ovary (see OVARIES) secretes at least two hormones – known, respectively, as oestradiol (follicular hormone) and progesterone (corpus luteum hormone). Oestradiol develops (under the stimulus of the anterior pituitary lobe – see PITUITARY GLAND below, and under separate entry) each time an ovum in the ovary becomes mature, and causes extensive proliferation of the ENDOMETRIUM lining the UTERUS, a stage ending with shedding of the ovum about 14 days before the onset of MENSTRUATION. The corpus luteum, which then forms, secretes both progesterone and oestradiol. Progesterone brings about great activity of the glands in the endometrium. The uterus is now ready to receive the ovum if it is fertilised. If fertilisation does not occur, the corpus luteum degenerates, the hormones cease acting, and menstruation takes place.

The hormone secreted by the testicles (see TESTICLE) is known as TESTOSTERONE. It is responsible for the growth of the male secondary sex characteristics.

Pancreas This gland is situated in the upper part of the abdomen and, in addition to the digestive enzymes, it produces INSULIN within specialised cells (islets of Langerhans). This controls carbohydrate metabolism; faulty or absent insulin production causes DIABETES MELLITUS.

Parathyroid glands These are four minute glands lying at the side of, or behind, the thyroid (see below). They have a certain e?ect in controlling the absorption of calcium salts by the bones and other tissues. When their secretion is defective, TETANY occurs.

Pituitary gland This gland is attached to the base of the brain and rests in a hollow on the base of the skull. It is the most important of all endocrine glands and consists of two embryologically and functionally distinct lobes.

The function of the anterior lobe depends on the secretion by the HYPOTHALAMUS of certain ‘neuro-hormones’ which control the secretion of the pituitary trophic hormones. The hypothalamic centres involved in the control of speci?c pituitary hormones appear to be anatomically separate. Through the pituitary trophic hormones the activity of the thyroid, adrenal cortex and the sex glands is controlled. The anterior pituitary and the target glands are linked through a feedback control cycle. The liberation of trophic hormones is inhibited by a rising concentration of the circulating hormone of the target gland, and stimulated by a fall in its concentration. Six trophic (polypeptide) hormones are formed by the anterior pituitary. Growth hormone (GH) and prolactin are simple proteins formed in the acidophil cells. Follicle-stimulating hormone (FSH), luteinising hormone (LH) and thyroid-stimulating hormone (TSH) are glycoproteins formed in the basophil cells. Adrenocorticotrophic hormone (ACTH), although a polypeptide, is derived from basophil cells.

The posterior pituitary lobe, or neurohypophysis, is closely connected with the hypothalamus by the hypothalamic-hypophyseal tracts. It is concerned with the production or storage of OXYTOCIN and vasopressin (the antidiuretic hormone).

PITUITARY HORMONES Growth hormone, gonadotrophic hormone, adrenocorticotrophic hormone and thyrotrophic hormones can be assayed in blood or urine by radio-immunoassay techniques. Growth hormone extracted from human pituitary glands obtained at autopsy was available for clinical use until 1985, when it was withdrawn as it is believed to carry the virus responsible for CREUTZFELDT-JAKOB DISEASE (COD). However, growth hormone produced by DNA recombinant techniques is now available as somatropin. Synthetic growth hormone is used to treat de?ciency of the natural hormone in children and adults, TURNER’S SYNDROME and chronic renal insu?ciency in children.

Human pituitary gonadotrophins are readily obtained from post-menopausal urine. Commercial extracts from this source are available and are e?ective for treatment of infertility due to gonadotrophin insu?ciency.

The adrenocorticotrophic hormone is extracted from animal pituitary glands and has been available therapeutically for many years. It is used as a test of adrenal function, and, under certain circumstances, in conditions for which corticosteroid therapy is indicated (see CORTICOSTEROIDS). The pharmacologically active polypeptide of ACTH has been synthesised and is called tetracosactrin. Thyrotrophic hormone is also available but it has no therapeutic application.

HYPOTHALAMIC RELEASING HORMONES which affect the release of each of the six anterior pituitary hormones have been identi?ed. Their blood levels are only one-thousandth of those of the pituitary trophic hormones. The release of thyrotrophin, adrenocorticotrophin, growth hormone, follicle-stimulating hormone and luteinising hormone is stimulated, while release of prolactin is inhibited. The structure of the releasing hormones for TSH, FSH-LH, GH and, most recently, ACTH is known and they have all been synthesised. Thyrotrophin-releasing hormone (TRH) is used as a diagnostic test of thyroid function but it has no therapeutic application. FSH-LH-releasing hormone provides a useful diagnostic test of gonadotrophin reserve in patients with pituitary disease, and is now used in the treatment of infertility and AMENORRHOEA in patients with functional hypothalamic disturbance. As this is the most common variety of secondary amenorrhoea, the potential use is great. Most cases of congenital de?ciency of GH, FSH, LH and ACTH are due to defects in the hypothalamic production of releasing hormone and are not a primary pituitary defect, so that the therapeutic implication of this synthesised group of releasing hormones is considerable.

GALACTORRHOEA is frequently due to a microadenoma (see ADENOMA) of the pituitary. DOPAMINE is the prolactin-release inhibiting hormone. Its duration of action is short so its therapeutic value is limited. However, BROMOCRIPTINE is a dopamine agonist with a more prolonged action and is e?ective treatment for galactorrhoea.

Thyroid gland The functions of the thyroid gland are controlled by the pituitary gland (see above) and the hypothalamus, situated in the brain. The thyroid, situated in the front of the neck below the LARYNX, helps to regulate the body’s METABOLISM. It comprises two lobes each side of the TRACHEA joined by an isthmus. Two types of secretory cells in the gland – follicular cells (the majority) and parafollicular cells – secrete, respectively, the iodine-containing hormones THYROXINE (T4) and TRI-IODOTHYRONINE (T3), and the hormone CALCITONIN. T3 and T4 help control metabolism and calcitonin, in conjunction with parathyroid hormone (see above), regulates the body’s calcium balance. De?ciencies in thyroid function produce HYPOTHYROIDISM and, in children, retarded development. Excess thyroid activity causes thyrotoxicosis. (See THYROID GLAND, DISEASES OF.)... endocrine glands

Gamma Aminobutyric Acid

See GABA.... gamma aminobutyric acid

Gamma Rays

Short-wavelength penetrating electromagnetic rays produced by some radioactive compounds. More powerful than X-rays, they are used in certain RADIOTHERAPY treatments and to sterilise some materials.... gamma rays

Gamma-globulin

Gamma-globulin describes a group of proteins present in the blood PLASMA. They are characterised by their rate of movement in an electrical ?eld, and can be separated by the process of ELECTROPHORESIS. Most gamma-globulins are IMMUNOGLOBULINS. Gamma-globulin injection provides passive or active immunity against HEPATITIS A. (See also GLOBULIN; IMMUNITY; IMMUNOLOGY.)... gamma-globulin

Glands – Swollen

Lymphadenitis. Non-infectious. Can be localised, e.g. armpit only, due to lymphatic drainage of a local inflammation or generalised due to systemic infection (AIDS) or some malignant conditions.

Symptoms. Swelling of glands of armpit, neck and groin.

Alternatives. Tea: combine equal parts: Clivers, Red Clover, Gotu Kola. 2 teaspoons to each cup boiling water; infuse 15 minutes. Dose: half-1 cup thrice daily.

Decoction. Formula. Equal parts, Yellow Dock, Plantain, Clivers, Liquorice root, 1oz to 1 pint water gently simmered 20 minutes. Half a cup thrice daily.

Powders. Formula. Bayberry 1; Echinacea 2; Poke root half; a trace of Cayenne. Dose: 500mg (two 00 capsules or one-third teaspoon) thrice daily.

Tinctures. Combine equal parts: Poke root and Echinacea. One 5ml teaspoon in water thrice daily.

Poke root. A leading remedy for the condition.

Agnus Castus. Swollen glands in young girls.

Dr Finlay Ellingwood: Liquid Extracts: equal parts, Blue Flag root and Poke root. 30-60 drops in water thrice daily.

Diet. See: DIET – GENERAL. See: LYMPHATICS. ... glands – swollen

Alendronic Acid

A bisphosphonate drug used in the treatment of osteoporosis and Paget’s disease of bone. The most common side effect is inflammation of the oesophagus, which causes heartburn or difficulty in swallowing. Other side effects can include headache and abdominal pain.... alendronic acid

Arachidonic Acid

One of the fatty acids in the body that are essential for growth.... arachidonic acid

Azelaic Acid

A topical drug used to treat mild to moderate acne.... azelaic acid

Bartholin’s Glands

A pair of oval, peasized glands whose ducts open into the vulva (the folds of flesh that surround the opening of the vagina). During sexual arousal, these glands secrete a fluid to lubricate the vulval region. Infection of the glands causes bartholinitis.... bartholin’s glands

Endocrine Gland

A gland that secretes hormones directly into the bloodstream rather than through a duct. Examples include the thyroid gland, pituitary gland, ovaries, testes, and adrenal glands. (See also exocrine gland.)... endocrine gland

Glanders

An infection of horses caused by the bacterium PSEUDOMONAS MALLEI. In rare cases, it is transmitted to humans, causing symptoms including fever and general aches and pains. Ulcers may develop where bacteria entered the skin; if bacteria enters the lungs, pneumonia may occur. In severe cases, septicaemia may follow. Treatment is with antibiotics.... glanders

Gland

A collection of CELLS or an ORGAN with a specialised ability to make and secrete chemical substances such as enzymes and hormones essential for the normal functioning of the body. Glands are classi?ed into two groups: ENDOCRINE and EXOCRINE. The former secrete their products, hormones, straight into the bloodstream; the latter’s secretions are discharged through ducts. (These functional differences are the reason why glands have been de?ned as ductless and ducted.) Examples of endocrine glands are the adrenals, PITUITARY GLAND and THYROID GLAND. Exocrine glands include SEBACEOUS GLANDS (in the skin) and the SALIVARY GLANDS in the mouth whose enzymes start the digestion of food. The BREASTS or mammary glands are exocrine glands that secrete milk. Though strictly speaking not a gland, LYMPH nodes (part of the lymphatic system) are sometimes called that. While they do not produce secretions, lymph glands do release white blood cells, an essential part of the body’s defence system.... gland

Glasgow Coma Scale

A method developed by two doctors in Glasgow that is used to assess the depth of COMA or unconsciousness suffered by an individual. The scale is split into three groups – eye opening, motor response, and verbal response – with the level of activity within each group given a score. A person’s total score is the sum of the numbers scored in each group, and this provides a reasonably objective assessment of the patient’s coma state – particularly useful when monitoring people who have suffered a head injury. (See also PERSISTENT VEGETATIVE STATE (PVS).)... glasgow coma scale

Linoleic Acid

An unsaturated fatty acid occurring widely in the glycerides of plants. It is an essential nutrient for mammals, including humans.... linoleic acid

Meibomian Glands

Numerous glands within the tarsal plates of the eyelids. Their secretions form part of the tears. (See EYE.)... meibomian glands

Oleic Acid

The most common of naturally occurring fatty acids, being present in most fats and oils in the form of triglyceride. It is used in the preparation of OINTMENTS, but not eye ointments.... oleic acid

Parotid Gland

One of the SALIVARY GLANDS. It is situated just in front of the ear, and its duct runs forwards across the cheek to open into the interior of the mouth on a little projection opposite the second last tooth of the upper row. The parotid gland is generally the ?rst of the salivary glands to become enlarged in MUMPS.... parotid gland

Picric Acid

A yellow crystalline solid substance which is used as a ?xative for tissues being prepared for examination under a microscope; it is also used as a dye.... picric acid

Pineal Gland

A small reddish structure, 10 mm in length and shaped somewhat like a pine cone (hence its name), situated on the upper part of the midbrain (see BRAIN). Many theories have been expounded as to its function, but there is increasing evidence that, in some animals at least, it is affected by light and plays a part in hibernation and in controlling sexual activity and the colour of the skin. This it seems to do by means of a substance it produces known as MELATONIN. There is also growing evidence that it may play a part in controlling the circadian rhythms of the body – the natural variations in physiological activities throughout the 24-hour day.... pineal gland

Ribonucleic Acid

See RNA.... ribonucleic acid

Sebaceous Gland

Oil secreting glands, mostly clustered around hair follicles. The oil, sebum, is released into the oil glands from the disintegrated cytoplasm of shedding holocrine cells that line the alveolar surfaces. The nature of the secretion is a direct reflection of the state of the body’s lipid metabolism.... sebaceous gland

Sebaceous Glands

The minute glands situated alongside hairs and opening into the follicles of the latter a short distance below the point at which the hairs emerge on the surface. These glands secrete an oily material, and are especially large upon the nose, where their openings form pits that are easily visible. In the mouth the glands open directly on the mucosal surface. (See also SKIN.)... sebaceous glands

Sweat Glands

See SKIN.... sweat glands

Acetylsalicyclic Acid

See ASPIRIN.... acetylsalicyclic acid

Adenitis Means Inflammation Of A Gland.

... adenitis means inflammation of a gland.

Ailanthus Glandulosa

Desf.

Synonym: A. altissima (Mill.) Swingle

Family: Simaroubaceae.

Habitat: Native of China and Japan. Found in the hills of northern India up to an altitude of 2,400 m.

English: Tree of Heaven, Ailanto.

Ayurvedic: Aralu (related sp.).

Action: Bark—astringent, anti- spasmodic, parasiticidal, narcotic, cardiac depressant (exercises powerful depressing influence on nervous system similar to that of tobacco).

Leaves produce dermatitis; their accumulation in well-water produces chronic gastritis.

Many quassinoids and ailanthone derivatives are vermifuge and amoe- bicidal. Constituents of the bark and stem, particularly ailanthone, have an- timalarial activity in vitro against Plasmodium falciparum and in mice against P. berghei. (Alkaloids do not appear to have these properties.) Some quassinoids are antineoplastic, and are reported to have antileukaemic properties.

The rootbark is used in traditional Chinese medicine for dysentery and leucorrhoea. In Africa, rootbark is used in epilepsy.... ailanthus glandulosa

Aminocaproic Acid

A drug used to treat hereditary angio-oedema (see under URTICARIA) – a serious anaphylactic (see ANAPHYLAXIS) reaction of the skin and respiratory tract resulting from a de?ciency in the body’s immunological defence mechanisms (see IMMUNITY).... aminocaproic acid

Bartholin’s Glands

Two small glands opening either side of the external vaginal ori?ce. Their secretions help to lubricate the vulva, when a woman is sexually aroused. The glands may become infected and very painful; sometimes an abscess develops and local surgery is required. Otherwise antibiotics, analgesics and warm baths are usually e?ective.... bartholin’s glands

Chromic Acid

Chromic acid is used in several industries, particularly in chromium plating. Unless precautions are taken it may lead to dermatitis of the hands, arms, chest and face. It may also cause deep ulcers, especially of the nasal septum and knuckles.... chromic acid

Cowper’s Glands

Also known as the bulbourethral glands, these are a pair of glands whose ducts open into the urethra at the base of the PENIS. They secrete a ?uid that is one of the constituents of the SEMEN which carries the spermatozoa and is ejaculated into the VAGINA during coitus (sexual intercourse).... cowper’s glands

Angelica Glauca

Edgew.

Family: Umbelliferae; Apiaceae.

Habitat: Kashmir and Chamba in Himachal Pradesh, between 1,8003,700 m.

English: Angelica.

Ayurvedic: Choraka, Chorakaa, Kopanaa, Chorakaakhya, Nishaachara, Dhanhar, Taskara, Kshemaka.

Action: Root—cordial and stimulant, carminative (used in constipation), expectorant, diaphoretic.

The root contains furocoumarins, also dimeric, lingusticum lactone.

Dosage: Root—3-5 g powder. (CCRAS.)... angelica glauca

Dioscorea Glabra

Roxb.

Family: Dioscoreaceae.

Habitat: Assam, Bengal, Bihar, Orissa and Andaman and Nicobar Islands.

Ayurvedic: Shankhaaluka.

Action: Tubers contain 77.7978.23% carbohydrates, 9.73-10.13% albuninoids.... dioscorea glabra

Elaeodendron Glaucum

Pers.

Cassine glauca (Rottb.)... elaeodendron glaucum

Ethacrynic Acid

A potent diuretic, with a rapid onset, and a short duration (4–6 hours), of action. (See THIAZIDES; DIURETICS.)... ethacrynic acid

Gamma

(Greek) The third letter of the Greek alphabet Gammah... gamma

Gamma Benzene Hexachloride

A drug that is used in the treatment of PEDICULOSIS and SCABIES.... gamma benzene hexachloride

Glade

(English) From the meadow in the woods

Glayd, Glayde, Glaid, Glaide, Glaed, Glaede... glade

Acid–base Balance

A combination of mechanisms that ensures that the body’s fluids are neither too acid nor too alkaline (alkalis are also called bases).

The body has three mechanisms for maintaining normal acid–base balance: buffers, breathing, and the activities of the kidneys. Buffers are substances in the blood that neutralize acid or alkaline wastes. Rapid breathing results in the blood becoming less acidic; slow breathing has the opposite effect. The kidneys regulate the amounts of acid or alkaline wastes in the urine.

Disturbances of the body’s acid–base balance result in either acidosis (excessive blood acidity) or alkalosis (excessive blood alkalinity).... acid–base balance

Acid Reflux

Regurgitation of acidic fluid from the stomach into the oesophagus due to inefficiency of the muscular valve at the lower end of the oesophagus. Also known as gastro-oesophageal reflux disease (GORD), acid reflux may inflame the oesophagus, resulting in heartburn due to oesophagitis. It may occur in pregnancy and often affects overweight people.... acid reflux

Adrenal Gland Disorders

A range of uncommon but sometimes serious disorders due to deficient or excessive production of hormones by one or both of the adrenal glands.

A genetic defect causes congenital adrenal hyperplasia, in which the adrenal cortex is unable to make sufficient hydrocortisone and aldosterone, and androgens are produced in excess. In adrenal failure, there is also deficient production of hormones by the adrenal cortex; if due to disease of the adrenal glands, it is called Addison’s disease. Adrenal tumours are rare and generally lead to excess hormone production.

In many cases, disturbed activity of the adrenal glands is caused, not by disease of the glands themselves, but by an increase or decrease in the blood level of hormones that influence the action of the adrenal glands. For example, hydrocortisone production by the adrenal cortex is controlled by ACTH, which is secreted by the pituitary gland. Pituitary disorders can disrupt production of hydrocortisone.... adrenal gland disorders

Apocrine Gland

A gland that discharges cellular material in addition to the fluid it secretes. The term is usually applied to the type of sweat glands that appear in hairy body areas after puberty. (See also eccrine gland.)... apocrine gland

Eccrine Gland

A type of sweat gland.... eccrine gland

Gamolenic Acid

An essential fatty acid found in evening primrose oil and starflower oil (borage oil).

Gamolenic acid may be prescribed for breast tenderness, premenstrual syndrome, and eczema.

Very large doses may cause abdominal pain and loose stools.... gamolenic acid

Glasses

Optical devices that use lenses to correct focusing errors in the eyes to achieve clear vision. Lenses are made of glass or plastic, and the shape and thickness are chosen during a vision test. Convex lenses are needed for hypermetropia (longsightedness), and concave lenses for myopia (shortsightedness). Tinted lenses protect the eyes from sunlight. (See also bifocal; contact lenses)... glasses

Glass Eye

See eye, artificial.... glass eye

Gladys

(Welsh) Form of Claudia, meaning “one who is lame”

Gladdis, Gladdys, Gladi, Gladis, Gladyss, Gwladys, Gwyladyss, Gleda, Glad, Gladdie, Gladdy, Gladdi, Gladdey, Gladdea, Gladdee... gladys

Glain

(Welsh) As precious as jewel Glaine, Glaina, Glayne, Glayna, Glaen, Glayn, Glaene, Glaena... glain

Glan

(Welsh) From the seashore Glann... glan

Glauce

(Greek) In mythology, a woman murdered by Medea... glauce

Gnida Glauca

(Fresen.) Gilg.

Synonym: G. eriocephalus Meis. Lasiosiphon glaucus Fresen. L. eriocephalus (Meisner) Decne.

Habitat: Western Ghats.

Action: Leaf—anti-inflammatory; used for contusions and swellings. Plant—vesicant.

The plant contains bicoumarins, lysocephalin and lasiocrin; a coumarin glucoside, crioside, and a bicoumarin glycoside, eriocephaloside. The plant also gave ingiresinol, syringin, gen- kwanin and its glycoside, beta-sitos- terol and its glucoside.... gnida glauca

Herniaria Glabra

Linn.

Family: Illecebraceae.

Habitat: Throughout Europe. Introduced into Indian gardens.

English: Rupture-Wort.

Action: Plant—astringent, diuretic, antimicrobial, anticatarrhal. An infusion is used principally for bladder complaints for ruptures.

The plant gave a flavonic glycoside, rutoside; coumarins, herniarin and umbelliferone, and saponins.

A related species, H. hirsuta L. (Himalaya, from Kashmir to Kumaon up to 3,000 m) gave umbelliferone, scopo- letin and herniarin.... herniaria glabra

Hour-glass Stomach

The term given to the X-ray appearance of a stomach which is constricted in its middle part due either to spasm of the stomach muscle or to contraction of scar tissue from a gastric ulcer.... hour-glass stomach

Liothyronine Acid

A preparation based on the thyroid (see THYROID GLAND) hormone triiodothyronine, which is prescribed to replace the lack of natural thyroid hormone (hypothyroidism). The drug is also used to treat goitre and cancer of the

thyroid gland. (See THYROID GLAND, DISEASES OF.)... liothyronine acid

Lysergic Acid Diethylamide (lsd)

Lysergic acid diethylamide belongs to the ergot group of ALKALOIDS. It has various effects on the brain, notably analgesic and hallucinogenic, thought to be due to its antagonism of 5hydroxytryptamine (5-HT). In small doses it induces psychic states, in which the individual may become aware of repressed memories. For this reason it may help in the treatment of certain anxiety states, if used under skilled supervision. LSD rapidly induces TOLERANCE, however, and psychological DEPENDENCE may occur, although not physical dependence. Serious side-effects include psychotic reactions, with an increased risk of suicide.... lysergic acid diethylamide (lsd)

Glycyrrhiza Glabra

Linn.

Family: Papilionaceae; Fabaceae.

Habitat: Native to the Mediterranean regions. Now grown in Punjab, Jammu and Kashmir and South India.

English: Licorice, Liquorice.

Ayurvedic: Yashtimadhu, Mad- huyashtyaahvaa, Madhuli, Mad- huyashtikaa, Atirasaa, Madhurasaa, Madhuka, Yastikaahva, Yashtyaah- va, Yashti, Yashtika, Yashtimadhuka. Klitaka (also equated with Indigofera tinctoria). (Klitaka and Klitanakam were considered as aquatic varieties of Yashtimadhu.)

Unani: Asl-us-soos, Mulethi. Rubb-us-soos (extract).

Siddha/Tamil: Athimathuram.

Action: Demulcent, expectorant, antiallergic, anti-inflammatory, spasmolytic, mild laxative, antistress, antidepressive, antiulcer, liver protective, estrogenic, em- menagogue, antidiabetic. Used in bronchitis, dry cough, respiratory infections, catarrh, tuberculosis; genitourinary diseases, urinary tract infections; abdominal pain, gastric and duodenal ulcers, inflamed stomach, mouth ulcer. Also used for adrenocorticoid insufficiency.

Key application: In catarrh of the upper respiratory tract and gastric, duodenal ulcers. (German Commission E, ESCOP, WHO.)

The British Herbal Compendium indicates the use of liquorice for bronchitis, chronic gastritis, peptic ulcer, rheumatism and arthritis, adrenocor- ticoid insufficiency, and to prevent liver toxicity. Indian Herbal Pharmacopoeia recognizes its use as an anti- inflammatory and antiulcer agent.

The main chemical constituent of liquorice is glycyrrhizin (about 29%), a triterpene saponin with low haemolytic index. Glycyrrhetinic (gly- cyrrhetic) acid (0.5-0.9%), the agly- cone of glycyrrhizin is also present in the root. Other active constituents of liquorice include isoflavonoids, chal- cones, coumarins, triterpenoids and sterols, lignans, amino acids, amines, gums and volatile oils.

Hypokalemia is the greatest threat when liquorice preparations high in glycyrrhizin are prescribed for prolonged periods. Liquorice causes fluid retention. Patients should be placed on a high potassium and low sodium diet. Special precautions should be taken with elderly patients and patients with hypertension or cardiac, renal or hepatic disease.

A special liquorice extract known as DGL (deglycyrrhizinated liquorice) is used in the treatment of peptic ulcer. Oral liquorice preparations, containing glycyrrheti- nic acid, are used for the treatment of viral infections—viral hepatitis, common cold. Topical preparations, containing glycyrrhetinic acid, are used for herpes, eczema, psoriasis.

In Japan, a preparation of glycyrrhi- zin, cysteine and glycine is used by injection for the treatment of acute and chronic hepatitis.

Dosage: Root—2-4 g powder. (API Vol. I.)... glycyrrhiza glabra

Jatropha Glandulifera

Roxb.

Family: Euphorbiaceae.

Habitat: South India and Bengal.

Ayurvedic: Vyaaghrairanda.

Siddha/Tamil: Adalai, Eliya- manakku.

Folk: Bagharenda, Jangali-erandi.

Action: Root and oil from seed— purgative. Oil—antirheumatic, antiparalytic. Used externally on ringworm and chronic ulcers. Root—used for glandular swellings.

Latex—applied to warts and tumours.

The plant contain alkannins (iso- hexenylnaphthazarins). The presence of alkannins in this plant (a member of Euphorbiaceae) should be considered as an exception.

The root gave jatropholone A, frax- etin and a coumarinolignan.

Dosage: Seed—50-100 mg powder. (CCRAS.)... jatropha glandulifera

Leucaena Glauca

Benth.

Synonym: L. leucocephala (Lam.) de Wit.

Family: Mimosaceae.

Habitat: The plains of India.

English: White Popinac, Lead tree.

Siddha/Tamil: Tagarai.

Folk: Vilaayati Baval Lasobaval (Gujarat).

Action: The bark and leaves contain 16.3 and 3% tannin respectively. Leaves also contain quercitrin (0.08%). The toxicity of the plant is due to an alkaloid leucenine or leucenol. Beta-and alpha-amino- propionic acid is reported to be identical with mimosine (from Mimosa pudica).

Seeds, in addition to a fatty oil (8.8%), also contain mucilage composed of mannans, glactans and xy- lans. Stachyose is also reported to be present in the seeds. (Heat treatment of leaves and seeds after moistening lowers the alkaloid content.)... leucaena glauca

Malpighia Glabra

Linn.

Family: Malpighiaceae.

Habitat: Native to tropical America; cultivated in gardens as hedge.

English: Barbados Cherry, Acerola.

Action: Fruits—used in dysentery, diarrhoea and liver disorders. Fruits are rich in ascorbic acid (1,000-4,000 mg/100 g of edible pulp). The bark contains about 26% tannin. Fruits of Brazilian plant gave alpha-carotene, beta-carotene and beta-cryptoxanthine.... malpighia glabra

Mandelic Acid

Also known as mandelamine, a non-toxic keto-acid used in the treatment of infections of the urinary tract, especially those due to the Escherichia coli and the Streptococcus faecalis or Enterococcus. It is administered in doses of 3 grams several times daily. As it is only e?ective in an acid urine, ammonium chloride must be taken at the same time.... mandelic acid

Mehlis’s Glands

A unicellular gland in cestodes, which encircles the ootype. Its function is not known.... mehlis’s glands

Para-amino Salicylic Acid

One of the early antituberculous (see TUBERCULOSIS) antibiotics. It tended to cause DYSPEPSIA and has been replaced by newer antituberculous drugs with fewer side-effects. The ?rst-line drugs for tuberculosis are now rifampicin, isoniazid, and ethambutol.... para-amino salicylic acid

Pericampylus Glaucus

(Lam.) Merill.

Family: Menispermaceae.

Habitat: Hill forests of Sikkim, Northern Bengal and Assam.

Folk: Baarak-kaant (Maharashtra), Goriaa-loti (Assam).

Action: Leaves—an infusion is used for asthma and high fever. Pounded leaves are applied in headache. The mucilage in water is used for arresting falling of hair.

The bark contains a non-toxic principle. The root is reported to contain a narcotic alkaloid.... pericampylus glaucus

Prussic Acid Poisoning

See CYANIDE POISONING.... prussic acid poisoning

Retinoic Acid

... retinoic acid

Polygonum Glabrum

Willd.

Family: Polygonaceae.

Habitat: Throughout India in marshy places, up to 1,900 m. in the hills.

Ayurvedic: Rakta-rohidaa (Gujarat).

Siddha/Tamil: Attalaree.

Action: Plant juice and rootstock— used in pneumonia, consumption, jaundice, fevers. Leaf— antispasmodic. Used for colic.

The leaves contain flavonoids— quercetin, rhamnetin, quercitrin, avic- ularin and rutin. Flowers contain pigments, delphinidin-3,5-diglucoside and cyanidin-3,5-diglucoside and quercetin.

The methanolic aqueous extract of the leaf gave a pure anthelmintic substance, a terpenoid (PGA). (The herb is used as an anthelmintic in Sudan.)... polygonum glabrum

Prostate Gland, Diseases Of

Disease of the PROSTATE GLAND can affect the ?ow of URINE so that patients present with urological symptoms.

Prostatitis This can be either acute or chronic. Acute prostatitis is caused by a bacterial infection, while chronic prostatitis may follow on from an acute attack, arise insidiously, or be non-bacterial in origin.

Symptoms Typically the patient has pain in the PERINEUM, groins, or supra pubic region, and pain on EJACULATION. He may also have urinary frequency, and urgency.

Treatment Acute and chronic prostatitis are treated with a prolonged course of antibiotics. Patients with chronic prostatitis may also require anti-in?ammatory drugs, and antidepressants.

Prostatic enlargement This is the result of benign prostatic hyperplasia (BPH), causing enlargement of the prostate. The exact cause of this enlargement is unknown, but it affects 50 per cent of men between 40 and 59 years and 95 per cent of men over 70 years.

Symptoms These are urinary hesitancy, poor urinary stream, terminal dribbling, frequency and urgency of urination and the need to pass urine at night (nocturia). The diagnosis is made from the patient’s history; a digital examination of the prostate gland via the rectum to assess enlargement; and analysis of the urinary ?ow rate.

Treatment This can be with tablets, which either shrink the prostate – an anti-androgen drug such as ?nasteride – or relax the urinary sphincter muscle during urination. For more severe symptoms the prostate can be removed surgically, by transurethral resection of prostate (TURP), using either electrocautery or laser energy. A new treatment is the use of microwaves to heat up and shrink the enlarged gland.

Cancer Cancer of the prostate is the fourth most common cause of death from cancer in northern European males: more than 10,000 cases are diagnosed every year in the UK and the incidence is rising by 3 per cent annually.

Little is known about the cause, but the majority of prostate cancers require the male hormones, androgens, to grow.

Symptoms These are similar to those resulting from benign prostatic hypertrophy (see above). Spread of the cancer to bones can cause pain. The use of a blood test measuring the amount of an ANTIGEN, PROSTATE SPECIFIC ANTIGEN (PSA), can be helpful in making the diagnosis – as can an ULTRASOUND scan of the prostate.

Treatment This could be surgical, with removal of the prostate (either via an abdominal incision, total prostatectomy, or transurethrally), or could be by radiotherapy. In more advanced cancers, treatment with anti-androgen drugs, such as cyprotexone acetate or certain oestrogens, is used to inhibit the growth of the cancer.... prostate gland, diseases of

Thyroid Gland, Diseases Of

... thyroid gland, diseases of

Tricholepis Glaberrima

DC.

Family: Compositae; Asteraceae.

Habitat: Rajasthan, Madhya Pradesh and Peninsular India.

Ayurvedic: Brahmadandi.

Action: Antiseptic (used in leucoderma), nervine tonic (used in seminal debility), urinary tract disinfectant. Root—bechic.

The plant contains betulin, spinas- terol, stigmasterol, stigma-7-enol and a triterpenoid—cycloart-23-en-3beta, 25-diol.... tricholepis glaberrima

Smilax Glabra

Roxb.

Family: Liliaceae.

Habitat: Assam, Khasi and Garo Hills, eastwards to upper Burma, Indo-China and southern China.

Ayurvedic: Dweepaantara-Vachaa, Chobachini (bigger var.).

Action: Roots—used for syphilis, venereal diseases and sores, as a blood purifier.

Astilbin, 3-O-caffeoyl-shikimic, fer- ulic, palmitic, shikimic and succinic acids; engeletin, isoengeletin; glucose; daucosterol, beta-sitosterol, stigmas- terol are major constituents of the root.

Crude saponins, isolated from the plant, produced preventive effect on cholesterol-fed atherosclerosis in quails.

Ayurvedic: Maitri.

Unani: Ushbaa (wild species).

Folk: Ghot-vel (Maharashtra).

Action: Roots—used as a substitute for Hemidesmus indicus. Used for venereal diseases, urinary infections, rheumatism. Also used for dysentery. (S. perfoliata Lour., synonym S. prolifera Roxb. is used as a substitute for S. ovalifolia.)... smilax glabra

Stephania Glabra

Miers.

Family: Menispermaceae.

Habitat: Himalayas from Simla to Sikkim, Khasi Hills and Assam.

Ayurvedic: Used as Paathaa (Cissampelos pareira).

Folk: Gidaangu (Garhwal), Paahraa (Dehradun).

Action: Tubers—used in pulmonary diseases, asthma, intestinal, disorders and hyperglycaemia.

Alkaloid palmitine exhibits antibiotic activity; stepharine anti-cholines- terase, cycleanine anti-inflammatory and hyndarine sedative activity. Tetra- hydropalmatine produces sedative and anticonvulsant effects on animals (similar but weaker to that of chloropro- mazine). Alkaloids from rhizomes— hypotensive. Pronuciferine hydrochloride—spasmolytic. Root—hypogly- caemic, spasmolytic, CNS active, antimicrobial.... stephania glabra

Thymus Gland

The thymus gland was given its name by Galen in the second century AD because of its resemblance to a bunch of thyme ?owers. It has two lobes and lies in the upper part of the chest. The centre (cortex) resembles LYMPHOID TISSUE and is made up of masses of small round cells called thymocytes (see THYMOCYTE; LYMPHOCYTE). The medulla is more loosely cellular and consists of a stroma which contains far fewer lymphocytes than are in the cortex.

The thymus gland is a vital part of the immunological system. Stem cells (see STEM CELL) from the BONE MARROW come to the thymus where they develop into immunologically competent cells. There are two distinct populations of lymphocytes. One is dependent on the presence of the thymus (Tlymphocytes); the other is independent of the thymus (B-lymphocytes). Both are concerned with immune responses (see IMMUNITY). The T-lymphocyte is a cell which in the absence of antigenic stimulation (see ANTIGEN) circulates through the blood, lymph nodes and back into the circulation again over a period of more than ten years. It performs a policing role, awaiting recognition of foreign material which it is able to identify as such. It reacts by multiplication and transformation and these are the ingredients of the immune response. B-lymphocytes are produced in the bone marrow and are concerned with the production of the circulating humoral ANTIBODIES.

The most common clinical disorder associated with abnormality of the thymus is MYASTHENIA GRAVIS. Ten per cent of patients with myasthenia gravis will have a tumour of the thymus, whilst the remainder will have in?ammatory changes in the thymus called thymitis.... thymus gland

Vitelline Glands

The glands which provide substances for the development of the egg and the formation of the shell in trematodes and cestodes.... vitelline glands

Acid-alkaline Balance

A healthy bloodstream depends upon maintenance of an acid-alkaline balance. Blood is always slightly alkaline. Only slight variations on either side are compatible with life. When this delicate balance is disturbed by faulty elimination of acid wastes, carbon dioxide, etc., a condition appears known as acidosis, a known precursor of chronic disease. A change of diet is indicated.

To help restore the acid-alkaline balance, any one of the following teas may assist: Iceland Moss, Bladderwrack (fucus), Kelp, Irish Moss, Slippery Elm, Calamus, Meadowsweet, or Dandelion (which may be taken as Dandelion coffee). ... acid-alkaline balance

Acid Foods

Foods that produce acid when metabolised. Ash from these foods contains sulphur, phosphoric acid and chlorine, all essential for efficient metabolism. Breads, cereals, cheese, chicken, chocolate, cocoa, coffee, cranberries, eggs, fish, flour, fowl, grain products, lentils, meats (lean), nuts, oats, oatmeal, oysters, pasta, peanuts, peanut butter, pearl barley, plums, prunes, rhubarb, rabbit, rice (white), sugar, sweet corn, tea, veal, wholemeal bread, wheatgerm. ... acid foods

Acid Rain Sickness

Acid rain air pollution is responsible for increased hospital admissions with respiratory illness when it hangs in a haze over a polluted area. The main components of acid rain are sulphates, salts of sulphur, known to cause breathing difficulties.

Alternatives. Teas: Alfalfa, Angelica leaves, Boneset, Catnep, Chamomile, Coltsfoot, Comfrey leaves, Dandelion leaves, Hyssop, Lemon Balm, Lime flowers, Milk Thistle, Mullein, White Horehound, Red Clover flowers, Sage, Violet leaves, Umeboshi tea.

Tablets/capsules. Chamomile, Echinacea, Iceland Moss, Irish Moss, Liquorice, Lobelia.

Powders. Formula. Equal parts: Echinacea, Barberry bark, Elecampane root. Dose: 500mg (two 00 capsules or one-third teaspoon) thrice daily.

Formula. Tinctures. Echinacea 2; Sarsaparilla 1; Fringe Tree half; Liquorice quarter. Mix. 1-2 teaspoons thrice daily. ... acid rain sickness

Cancer – Prostate Gland

Adeno-carcinoma. A hormone-related tumour in elderly men. Enlargement of the gland may be benign or carcinomatous. Fibrosis (hardening) may arise from inflammation. Obstruction of the outlet of the bladder through swelling of the gland (prostatism) may cause uraemia.

Symptoms. Bladder irritability; increased frequency during the night. Feeble forked stream of urine. Sometimes blood. Three quarters of such tumours are located in the posterior lobe of the prostate gland – readily accessible to the examining finger through the front wall of the rectum. Rectal examination reveals a hard rugged prostate. Cystoscopy confirms. Bone pains in the low back or pelvis reflect a stage where the tumour has already spread. Anaemia, weight loss, urgency.

All symptoms are worse by alcohol and spicy foods.

Harvard University scientists report: heavy consumption of animal fat, especially the fat in red meat appears to increase the chance that a man will develop advanced prostate cancer.

Of therapeutic value. Comfrey, Echinacea, Horsetail, Poke root, Thuja, Cornsilk, Goldenseal.

Tea. Combination. Comfrey leaves, Horsetail, Cornsilk. Equal parts. 2-3 teaspoons to each cup boiling water. Drink freely.

Formula No. 1. Echinacea 2; Comfrey 1; Poke root half; Thuja half. Mix. Dose: Powders: 500mg (two 00 capsules or one-third teaspoon). Liquid extracts: 1 teaspoon. Tinctures: 2 teaspoons. Thrice daily in water or cup of Cornsilk tea.

Formula No. 2. (Alternative) Echinacea 2; Goldenseal 1; Gotu Kola 1; Poke root half. Mix. Dose: Powders: 500mg (two 00 capsules or one-third teaspoon). Liquid extracts: 1 teaspoon. Tinctures: 2 teaspoons in water or cup of Cornsilk tea.

Bee pollen. Of value.

Garlic. Of value.

Diet. See: DIET – CANCER.

There is a very low incidence of prostate cancer in countries where Soya products are widely consumed – Soya contains a female hormone which is a protector factor.

Supplements. Morning and evening.

Vitamin A 7500iu or more. Large doses may be required. Vitamin C 1-2g. Vitamin E 200iu. Calcium 500mg. Selenium 100mcg. Zinc.

Study. Men with prostate cancer may not need to undergo radical prostatectomy (removal of the prostate gland). A 10-year follow-up study of men with early prostate cancer left untreated showed that 10 years later only 8.5 per cent of the 223 patients had died from prostate cancer. The survival rate of 86.8 per cent in the untreated group was nearly identical to a subgroup who met all the conditions for radical prostatectomy. (Journal of American Medical Association, 22/29 April 1992)

Commonly treated with female sex hormone or by orchidectomy.

It would appear that surgical removal of the gland offers little benefit, and possibly a disadvantage to patients wishing to leave well alone, particularly the elderly. Treatment by a general medical practitioner or oncologist. ... cancer – prostate gland

Gladlax Tablets

Active Constituents: Aloes (Cape) BP 50.00mg. Pulverised Fennel (BHMA Master File 006/2) BHP (1983) 15.00mg. Pulverised Valerian BP 30.00mg. Pulverised Holy Thistle BHP (1983) (BHMA Master File 51/1) 60.00mg. A traditional herbal remedy for the relief of occasional or non-persistent constipation. Not for pregnancy or nursing mothers. (Gerard House) ... gladlax tablets

Gland Balancer

There are times when the endocrine orchestra fails to strike its normal note; when energies of life flow slowly and body tone is low. Such is when stimulation of the thyroid, pancreas, and adrenals by natural precursors of their hormones is helpful. The following has a hormone- effect and proves useful for general weakness, change of life, persistent fatigue, sterility, puberty and adolescence, frigidity, metabolic disorders:

Formula. Ginseng 2; Liquorice 1; Sarsaparilla 1; Ginger half; Kelp half. Dose – powders: half a teaspoon; tinctures 1-3 teaspoons; liquid extracts: 1-2 teaspoons; in water or honey thrice daily. ... gland balancer

Glauber Salts

One pinch Glauber salts in an early morning cup of tea, every day, was once taken as a preventative for gout. ... glauber salts

Lymph Glands

Traps in the lymphatic system that collect byproducts of body infection and which support the immune system in its role as body protector. ... lymph glands

Acetic Acid

The colourless, pungent, organic acid that gives vinegar its sour taste.

In medicine, acetic acid is an ingredient of antiseptic gels that are used for certain vaginal infections.... acetic acid

Glass Test

A test for meningitis that involves pressing a clear glass against a rash. If the rash remains visible, it may be a form of purpura, which sometimes occurs in meningitis.... glass test

Lymph Gland

A popular name for a lymph node.

(See also lymphatic system.)... lymph gland

Para-aminobenzoic Acid

The active ingredient of many sunscreen preparations. Its abbreviation is.... para-aminobenzoic acid

Parotid Glands

The largest of the 3 pairs of salivary glands.

The parotid glands lie above the angle of the jaw, below and in front of the ear, on each side of the face.... parotid glands

Thyroid Gland, Disorders Of

Disorders of the thyroid gland may cause hyperthyroidism, hypothyroidism, or enlargement or distortion of the gland. Myxoedema, Graves’ disease, and Hashimoto’s thyroiditis are common disorders. Goitre may sometimes occur with no accompanying abnormality of thyroid function. In rare cases, the gland is absent at birth, producing severe cretinism. Sometimes it develops in an abnormal position in the neck, causing, in rare cases, difficulty in swallowing or breathing.

A genetic disorder may impair the thyroid’s ability to secrete hormones and goitre may result. Thyroid infection is uncommon and leads to thyroiditis. Viral infection can cause extreme pain and temporary hyperthyroidism. Hormonal changes during puberty or pregnancy may cause a degree of goitre temporarily. Hyperthyroidism due to excessive production of by the pituitary gland is rare but can occur as a result of a pituitary tumour.

Because iodine is necessary for the production of thyroid hormone, its deficiency may lead to goitre. Severe iodine deficiency in children may cause myxoedema. (See also thyroid cancer.)

thyroid hormones The 3 hormones produced by the thyroid gland are thyroxine (T4) and triiodothyronine (T3), which regulate metabolism, and calcitonin, which helps to regulate calcium levels in the body.... thyroid gland, disorders of

Acetylsalicylic Acid

see aspirin.... acetylsalicylic acid

Acid-etch Technique

a technique for creating a mechanical bond between resin-based materials and the enamel of teeth; it is used to retain and seal the margins of composite fillings, to retain brackets of fixed orthodontic appliances, and to retain resin-based *fissure sealants and adhesive bridges. Phosphoric acid is used to create a porous surface into which a bonding agent can flow.... acid-etch technique

Acid-fast

adj. 1. describing bacteria that have been stained and continue to hold the stain after treatment with an acidic solution. For example, tuberculosis bacteria are acid-fast when stained with a *carbol fuchsin preparation. 2. describing a stain that is not removed from a specimen by washing with an acidic solution.... acid-fast

Amino Acid

an organic compound containing an amino group (–NH2) and a carboxyl group (–COOH). Amino acids are fundamental constituents of all *proteins. They are classified as *essential amino acids, i.e. those that cannot be synthesized by the body, and nonessential amino acids, which can be synthesized by the body. Certain amino acids present in the body are not found in proteins; these include *citrulline, *ornithine, *taurine, and *gamma-aminobutyric acid.... amino acid

Aspartic Acid

(aspartate) see amino acid.... aspartic acid

Benzoic Acid

an antiseptic, active against fungi and bacteria, used as a preservative in foods and pharmaceutical preparations and, combined with salicylic acid, in the form of an ointment (Whitfield’s ointment) for the treatment of ringworm.... benzoic acid

Brunner’s Glands

compound glands of the small intestine, found in the *duodenum and the upper part of the jejunum. They are embedded in the submucosa and secrete mucus. [J. C. Brunner (1856–1927), Swiss anatomist]... brunner’s glands

Buccal Glands

small glands in the mucous membrane lining the mouth. They secrete material that mixes with saliva.... buccal glands

Bulbourethral Glands

see Cowper’s glands.... bulbourethral glands

Cholic Acid

(cholalic acid) see bile acids.... cholic acid

Citric Acid Cycle

see Krebs cycle.... citric acid cycle

Clavulanic Acid

a drug that interferes with the *penicillinases that inactivate *beta-lactam antibiotics, such as *amoxicillin or *ticarcillin. Combined with the antibiotic, clavulanic acid can overcome drug resistance.... clavulanic acid

Cowper’s Glands

(bulbourethral glands) a pair of small glands that open into the urethra at the base of the penis. Their secretion contributes to the seminal fluid, but less than that of the prostate gland or seminal vesicles. [W. Cowper (1660–1709), English surgeon]... cowper’s glands

Deoxycholic Acid

see bile acids.... deoxycholic acid

Essential Amino Acid

an *amino acid that is essential for normal growth and development but cannot be synthesized by the body. Essential amino acids are obtained from protein-rich foods in the diet, such as meat, fish, eggs, and dairy products. Adults require eight essential amino acids: leucine, isoleucine, valine, phenylalanine, threonine, methionine, tryptophan, and lysine. Children require an additional nine, as their body’s requirement is greater than can be synthesised by it: tyrosine, glycine, cysteine, arginine, proline, histidine, glutamine, serine, and asparagine.... essential amino acid

Fatty Acid

an organic acid with a long straight hydrocarbon chain and an even number of carbon atoms. Fatty acids are the fundamental constituents of many important lipids, including *triglycerides. Some fatty acids can be synthesized by the body; others, the *essential fatty acids, must be obtained from the diet. Examples of fatty acids are palmitic acid, oleic acid, and stearic acid. See also fat; saturated fatty acid; unsaturated fatty acid.... fatty acid

Folinic Acid

a derivative of folic acid involved in purine synthesis. It is used to reverse the biological effects of methotrexate and other *dihydrofolate reductase inhibitors and so to prevent excessive toxicity. This action is termed folinic acid rescue. Folinic acid has a potentiating effect with *fluorouracil, with which it is often used.... folinic acid

Gamma Camera

an apparatus that detects gamma rays emitted by radioactive isotopes that have been introduced into the body as *tracers. It contains an activated sodium iodide crystal (see scintillator) and a large array of photomultiplier tubes. Using lead *collimators, the position of the source of the radioactivity can be plotted and displayed on a TV monitor or photographic film (see scintigram).... gamma camera

Gamma Knife

a device that allows high doses of radiation in the form of gamma rays to be accurately focused on pathological tissue, with less risk of damaging adjacent normal tissue compared with conventional radiotherapy. Multiple cobalt-60 sources deliver the gamma irradiation. The device is used in the treatment of vestibular schwannomas, certain brain tumours, vascular lesions of the brain, trigeminal neuralgia, and some forms of epilepsy.... gamma knife

Gastric Glands

tubular glands that lie in the mucous membrane of the stomach wall. There are three varieties: the cardiac, parietal (oxyntic), and pyloric glands, and they secrete *gastric juice.... gastric glands

Glabella

n. the smooth rounded surface of the *frontal bone in the middle of the forehead, between the two eyebrows.... glabella

Gladiolus

n. the middle and largest segment of the *sternum.... gladiolus

Glansectomy

n. a surgical procedure that involves excising the *glans, which preserves the penis and is an option for men with penile cancer.... glansectomy

Glare

n. the undesirable effects of scattered stray light on the retina, causing reduced contrast and visual performance as well as annoyance and discomfort. Glare is most commonly caused by cataract or corneal opacity... glare

Glass Ionomer

a dental filling material that is based on a *cement of a silicate glass and an organic acid.... glass ionomer

Glatiramer

n. a drug that modifies the body’s immune response and is used to reduce the frequency of relapses in people with relapsing/remitting multiple sclerosis. Side-effects include flushing and palpitations.... glatiramer

Glaukomflecken

pl. n. small anterior subcapsular lens opacities seen in acute (angle-closure) glaucoma.... glaukomflecken

Glucuronic Acid

a sugar acid derived from glucose. Glucuronic acid is an important constituent of *chondroitin sulphate (found in cartilage) and *hyaluronic acid (found in synovial fluid).... glucuronic acid

Glutamic Acid

(glutamate) see amino acid; neurotransmitter.... glutamic acid

Glutamic Acid Decarboxylase

(GAD) a common enzyme that, because of similarities to certain bacterial proteins, can provoke an autoimmune reaction against the beta cells of the pancreas (see islet cell antibodies) progressing to type 1 *diabetes mellitus.... glutamic acid decarboxylase

Glycocholic Acid

see bile acids.... glycocholic acid

Histamine Acid Phosphate

a derivative of *histamine that was formerly used to test for acid secretion in the stomach in conditions involving abnormal gastric acid secretion, such as *Zollinger-Ellison syndrome.... histamine acid phosphate

Homogentisic Acid

a product formed during the metabolism of the amino acids phenylalanine and tyrosine. In normal individuals homogentisic acid is oxidized by the enzyme homogentisic acid oxidase. In rare cases this enzyme is lacking and a condition known as *alcaptonuria, in which large amounts of homogentisic acid are excreted in the urine, results.... homogentisic acid

Hyaluronic Acid

an acid *mucopolysaccharide that acts as the binding and protective agent of the ground substance of connective tissue. It is also present in the synovial fluid around joints and in the vitreous and aqueous humours of the eye.... hyaluronic acid

Hydrocyanic Acid

(prussic acid) an intensely poisonous volatile acid that can cause death within a minute if inhaled. It has a smell of bitter almonds. See cyanide.... hydrocyanic acid

5-hydroxyindoleacetic Acid

(5-HIAA) a metabolite of *serotonin, the most common secretion product of *carcinoid tumours. Measured over 24 hours in the urine, this is the most reliable screening test for such tumours.... 5-hydroxyindoleacetic acid

Lieberkühn’s Glands

(crypts of Lieberkühn) simple tubular glands in the mucous membrane of the *intestine. In the small intestine they lie between the villi. They are lined with columnar *epithelium in which various types of secretory cells are found. In the large intestine Lieberkühn’s glands are longer and contain more mucus-secreting cells. [J. N. Lieberkühn (1711–56), German anatomist]... lieberkühn’s glands

Linolenic Acid

see essential fatty acid.... linolenic acid

Lipoic Acid

a sulphur-containing compound that can be readily interconverted to and from its reduced form, dihydrolipoic acid. Lipoic acid functions in carbohydrate metabolism as one of the *coenzymes in the oxidative decarboxylation of pyruvate and other ?-keto acids.... lipoic acid

Lysergic Acid Diethylamide

(LSD) an illegal hallucinogenic drug that was formerly used to aid treatment of certain psychological disorders. Side-effects include digestive upsets, dizziness, tingling, anxiety, sweating, dilated pupils, muscle incoordination and tremor. Alterations in sight, hearing, and other senses occur, psychotic effects, depression, and confusion are common, and tolerance to the drug develops rapidly. Because of these toxic effects, LSD is no longer used clinically. See Appendix 12 for a list of street names for illicit drugs.... lysergic acid diethylamide

Nitric Acid

a strong corrosive mineral acid, HNO3, the concentrated form of which is capable of producing severe burns of the skin. Swallowing the acid leads to intense burning pain and ulceration of the mouth and throat. Treatment is by immediate administration of alkaline solutions, followed by milk or olive oil.... nitric acid

Osmic Acid

see osmium tetroxide.... osmic acid

Palmitic Acid

see fatty acid.... palmitic acid

Periodic Acid–schiff Reaction

(PAS reaction) a test for the presence of glycoproteins, polysaccharides, certain mucopolysaccharides, glycolipids, and certain fatty acids in tissue sections. The tissue is treated with periodic acid, followed by *Schiff’s reagent. A positive reaction is the development of a red or magenta coloration.... periodic acid–schiff reaction

Preputial Glands

modified sebaceous glands on the inner surface of the *prepuce.... preputial glands

Prussic Acid

see hydrocyanic acid.... prussic acid

Pteroylglutamic Acid

see folate.... pteroylglutamic acid

Pyruvic Acid

(pyruvate) a compound, derived from carbohydrates, that may be oxidized via a complex series of reactions in the *Krebs cycle to yield carbon dioxide and energy in the form of ATP.... pyruvic acid

Salivary Gland

a gland that produces *saliva. There are three pairs of salivary glands: the *parotid glands, *sublingual glands, and *submandibular glands (see illustration). They are stimulated by reflex action, which can be initiated by the taste, smell, sight, or thought of food.... salivary gland

Saturated Fatty Acid

a *fatty acid in which all the carbon atoms are linked by single bonds and the molecule is unable to accept additional atoms (i.e. it cannot undergo addition reactions with other molecules). These fats occur mainly in animal and dairy products, and a diet high in these foods may contribute to a high serum cholesterol level, which may increase the risk of *coronary artery disease. Compare unsaturated fatty acid.... saturated fatty acid

Sialic Acid

an amino sugar. Sialic acid is a component of some *glycoproteins, *gangliosides, and bacterial cell walls.... sialic acid

Stearic Acid

see fatty acid.... stearic acid

Sublingual Gland

one of a pair of *salivary glands situated in the lower part of the mouth, one on either side of the tongue. The sublingual glands are the smallest salivary glands; each gland has about 20 ducts, most of which open into the mouth directly above the gland.... sublingual gland

Submandibular Gland

(submaxillary gland) one of a pair of *salivary glands situated below the parotid glands. Their ducts (Wharton’s ducts) open in two papillae under the tongue, on either side of the frenulum.... submandibular gland

Submaxillary Gland

see submandibular gland.... submaxillary gland

Sulphuric Acid

a powerful corrosive acid, H2SO4, widely used in industry. Swallowing the acid causes severe burning of the mouth and throat and difficulty in breathing, speaking, and swallowing. The patient should drink large quantities of milk or water or white of egg; gastric lavage should not be delayed. Skin or eye contact should be treated by flooding the area with water.... sulphuric acid

Sweat Gland

a simple coiled tubular *exocrine gland that lies in the dermis of the *skin. A long duct carries its secretion (*sweat) to the surface of the skin. Sweat glands occur over most of the surface of the body; they are particularly abundant in the armpits, on the soles of the feet and palms of the hands, and on the forehead.... sweat gland

Tarsal Glands

see meibomian glands.... tarsal glands

Taurocholic Acid

see bile acids.... taurocholic acid

Trichloracetic Acid

an *astringent used for a variety of skin conditions. It is also applied topically to produce sloughing, especially for the removal of warts.... trichloracetic acid

Undecenoic Acid

an antifungal agent, applied to the skin for the treatment of athlete’s foot.... undecenoic acid

Unsaturated Fatty Acid

a *fatty acid in which one (monounsaturated) or many (polyunsaturated) of the carbon atoms are linked by double bonds that are easily split in chemical reactions so that other substances can connect to them. These fats occur in fish and plant-derived foods, and a diet high in unsaturated fats is associated with low serum cholesterol levels. Compare saturated fatty acid.... unsaturated fatty acid

Valproic Acid

see sodium valproate.... valproic acid

Vanillylmandelic Acid

(VMA) a metabolite of *catecholamines excreted in abnormal amounts in the urine in conditions of excess catecholamine production, such as *phaeochromocytoma. The measurement of VMA levels in a 24-hour urine sample was formerly used as a screening test for this condition, but in the UK it has been largely superseded by the urinary metanephrine test (see metanephrine and normetanephrine).... vanillylmandelic acid

Vestibular Glands

the two pairs of glands that open at the junction of the vagina and vulva. The more posterior of the two are the greater vestibular glands (Bartholin’s glands); the other pair are the lesser vestibular glands. Their function is to lubricate the entrance to the vagina during coitus.... vestibular glands

Zoledronic Acid

(zolendronate) a *bisphosphonate drug that is used to treat Paget’s disease and malignant *hypercalcaemia and is also establishing a role in treating bone metastases, both in terms of symptom relief and preventing bone fractures.... zoledronic acid



Recent Searches