Biomaterial Database

Metabolism of 3alpha, 7alpha, 12alpha-trihydroxy-5beta-cholestan-26-oic acid in normal subjects with an intact enterohepatic circulation. 1977

R F Hanson, and G C Williams

The formation of cholic acid from 3alpha, 7alpha, 12alpha-trihydroxy-5beta-cholestan-26-oic acid (THCA) was studied in two normal subjects. [3H]THCA and [14C]cholic acid were administered intravenously by simultaneous injection and the specific activities (percent injected amount/mumol) of [3H]- and [14C]cholic acid were measured in bile samples collected over a 5-day period. If the administered [3H]-THCA is rapidly and completely metabolized into cholic acid, the areas under the specific activity curves of [3H]- and [14C]cholic acid should be identical. In these two subjects, the area under the [3H]cholic acid specific activity decay curves was only 18.4% and 9.0% less than the area under the [14C]cholic acid specific activity decay curves. Thus, there is rapid and nearly complete metabolism of intravenously administered [3H]THCA into cholic acid.

UI	MeSH Term	Description	Entries
D007553	Isotope Labeling	Techniques for labeling a substance with a stable or radioactive isotope. It is not used for articles involving labeled substances unless the methods of labeling are substantively discussed. Tracers that may be labeled include chemical substances, cells, or microorganisms.	Isotope Labeling, Stable,Isotope-Coded Affinity Tagging,Isotopically-Coded Affinity Tagging,Affinity Tagging, Isotope-Coded,Affinity Tagging, Isotopically-Coded,Isotope Coded Affinity Tagging,Labeling, Isotope,Labeling, Stable Isotope,Stable Isotope Labeling,Tagging, Isotope-Coded Affinity,Tagging, Isotopically-Coded Affinity
D007700	Kinetics	The rate dynamics in chemical or physical systems.
D008297	Male		Males
D002250	Carbon Radioisotopes	Unstable isotopes of carbon that decay or disintegrate emitting radiation. C atoms with atomic weights 10, 11, and 14-16 are radioactive carbon isotopes.	Radioisotopes, Carbon
D002777	Cholestanols	Cholestanes substituted in any position with one or more hydroxy groups. They are found in feces and bile. In contrast to bile acids and salts, they are not reabsorbed.	Bile Alcohol,Bile Alcohols,Hydroxycholestane,Hydroxycholestanes,Alcohol, Bile,Alcohols, Bile
D002793	Cholic Acids	The 3 alpha,7 alpha,12 alpha-trihydroxy-5 beta-cholanic acid family of bile acids in man, usually conjugated with glycine or taurine. They act as detergents to solubilize fats for intestinal absorption, are reabsorbed by the small intestine, and are used as cholagogues and choleretics.	Cholalic Acids,Acids, Cholalic,Acids, Cholic
D003201	Computers	Programmable electronic devices designed to accept data, perform prescribed mathematical and logical operations at high speed, and display the results of these operations.	Calculators, Programmable,Computer Hardware,Computers, Digital,Hardware, Computer,Calculator, Programmable,Computer,Computer, Digital,Digital Computer,Digital Computers,Programmable Calculator,Programmable Calculators
D004764	Enterohepatic Circulation	Recycling through liver by excretion in bile, reabsorption from intestines (INTESTINAL REABSORPTION) into portal circulation, passage back into liver, and re-excretion in bile.	Circulation, Enterohepatic,Entero-Hepatic Circulation,Circulation, Entero-Hepatic,Circulations, Entero-Hepatic,Circulations, Enterohepatic,Entero Hepatic Circulation,Entero-Hepatic Circulations,Enterohepatic Circulations
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328	Adult	A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available.	Adults