Canadian Medical Guide > Chemicals and Drugs > Polycyclic Hydrocarbons > Steroids Terms and Definitions




Steroids

Medical Definition: A group of polycyclic compounds closely related biochemically to TERPENES. They include cholesterol, numerous hormones, precursors of certain vitamins, bile acids, alcohols (STEROLS), and certain natural drugs and poisons. Steroids have a common nucleus, a fused, reduced 17-carbon atom ring system, cyclopentanoperhydrophenanthrene. Most steroids also have two methyl groups and an aliphatic side-chain attached to the nucleus. (From Hawley's Condensed Chemical Dictionary, 11th ed)
Guide Notes: GEN; avoid: too general; prefer more specific steroid groups or specific steroids
Also Called: Catatoxic Steroids,Steroid Metabolic Effects
Steroids Categories.
Canadian Medical Guide Definition Androstanes - The family of steroids from which the androgens are derived.
Canadian Medical Guide Definition Bile Acids and Salts - Steroid acids and salts. The primary bile acids are derived from cholesterol in the liver and usually conjugated with glycine or taurine. The secondary bile acids are further modified by bacteria in the intestine. They play an important role in the digestion and absorption of fat. They have also been used pharmacologically, especially in the treatment of gallstones.
Canadian Medical Guide Definition Bufanolides - Steroids derived from various Bufo species and often possessing cardiotonic properties.
Canadian Medical Guide Definition Cardanolides - The aglycone constituents of CARDIAC GLYCOSIDES. The ring structure is basically a cyclopentanoperhydrophenanthrene nucleus attached to a lactone ring at the C-17 position.
Canadian Medical Guide Definition Cholanes
Canadian Medical Guide Definition Cholestanes - Derivatives of the saturated steroid cholestane with methyl groups at C-18 and C-19 and an iso-octyl side chain at C-17.
Canadian Medical Guide Definition Cyclosteroids - Steroid derivatives in which one or more bridges is formed between carbon atoms at any locant in any of the rings.
Canadian Medical Guide Definition Estranes - A group of compounds forming the nucleus of the estrogenic steroid family.
Canadian Medical Guide Definition Gonanes - Steroids containing the fundamental tetracyclic unit with no methyl groups at C-10 and C-13 and with no side chain at C-17. The concept includes both saturated and unsaturated derivatives.
Canadian Medical Guide Definition Homosteroids - Steroids whose structure has been expanded by the addition of one or more carbon atoms to the ring skeleton in any of the four rings.
Canadian Medical Guide Definition Hydroxysteroids - Steroids in which one or more hydroxy groups have been substituted for hydrogen atoms either within the ring skeleton or on any of the side chains.
Canadian Medical Guide Definition Ketosteroids - Steroid derivatives formed by oxidation of a methyl group on the side chain or a methylene group in the ring skeleton to form a ketone.
Canadian Medical Guide Definition Norsteroids - Steroids which have undergone contraction in ring size or reduction in side chains.
Canadian Medical Guide Definition Pregnanes - Saturated derivatives of the steroid pregnane. The 5-beta series includes PROGESTERONE and related hormones; the 5-alpha series includes forms generally excreted in the urine.
Canadian Medical Guide Definition Secosteroids - Steroids in which fission of one or more ring structures and concomitant addition of a hydrogen atom at each terminal group has occurred.
Canadian Medical Guide Definition Spirostans - Steroid derivatives containing a fused lactone ring at the 16,17-position and a spiroglycosidic linkage at C-22. The most common representatives in this group are the plant-derived SAPOGENINS.
Canadian Medical Guide Definition Steroids, Brominated - Steroids which are substituted with one or more bromine atoms in any position.
Canadian Medical Guide Definition Steroids, Chlorinated - Steroids which are substituted with one or more chlorine atoms in any position.
Canadian Medical Guide Definition Steroids, Fluorinated - Steroids which are substituted with one or more fluorine atoms in any position.
Canadian Medical Guide Definition Steroids, Heterocyclic - Steroidal compounds in which one or more carbon atoms in the steroid ring system have been substituted with non-carbon atoms.

Steroids Medical Definitions and Terms

CANADIAN MEDICAL GUIDE

Thank you for visiting Canadian Medical Guide .com





Wildlife On Video »

Canadian Medical Guide Canada's Great Outdoors
Tour Canadian Rockies »
Book Banff »
Book Jasper »
Maligne Lake Boat Cruise »
Gondola Banff »
Hike Jasper »
Jasper Columbia Icefield »