Steroid metabolism by the lung: conversion of dihydrotestosterone to 5 alpha-androstan-3 alpha, 17 beta-diol by rat lung tissue in vitro. 1979

L W Kao, and M J Crosswell, and J Weisz

The potential of lung tissue of adult male rats metabolize dihydrotestosterone (DHT) in vitro was examined. Within 3 min, a homogenate of 100 mg lung tissue, cleared of blood by perfusion before homogenization, metabolized 90% of the [3H]DHT substrate. Appoximately 80% of the DHT was converted to 5 alpha-androstan- alpha, 17 beta-diol. The amount of 5 alpha-androstan-3 alpha, 17 beta-diol formed during a 5-min incubation increased linearly, with substrate concentrations ranging from 3.3 x 10(-8) to 3 x 10(-6) M. Thus, the capacity of rat lung tissue to metabolize DHT in vitro and the rate of 3 alpha-reduction of DHT are sufficiently great to consider the possibility that lung may be responsible for the rapid clearance of DHT from the circulation in this species.

UI MeSH Term Description Entries
D007700 Kinetics The rate dynamics in chemical or physical systems.
D008168 Lung Either of the pair of organs occupying the cavity of the thorax that effect the aeration of the blood. Lungs
D008297 Male Males
D000731 Androstanes The family of steroids from which the androgens are derived.
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D013196 Dihydrotestosterone A potent androgenic metabolite of TESTOSTERONE. It is produced by the action of the enzyme 3-OXO-5-ALPHA-STEROID 4-DEHYDROGENASE. 5 alpha-Dihydrotestosterone,Androstanolone,Stanolone,17 beta-Hydroxy-5 beta-Androstan-3-One,17beta-Hydroxy-5alpha-Androstan-3-One,5 beta-Dihydrotestosterone,5-alpha Dihydrotestosterone,5-alpha-DHT,Anaprotin,Andractim,Dihydroepitestosterone,Gelovit,17 beta Hydroxy 5 beta Androstan 3 One,17beta Hydroxy 5alpha Androstan 3 One,5 alpha DHT,5 alpha Dihydrotestosterone,5 beta Dihydrotestosterone,Dihydrotestosterone, 5-alpha,beta-Hydroxy-5 beta-Androstan-3-One, 17
D015113 Androstane-3,17-diol The unspecified form of the steroid, normally a major metabolite of TESTOSTERONE with androgenic activity. It has been implicated as a regulator of gonadotropin secretion. 5 Androstane 3,17 diol,5 alpha-Androstane-3 alpha,17 beta-diol,5 alpha-Androstane-3 beta,17 alpha-diol,5 alpha-Androstane-3 beta,17 beta-diol,5 alpha-Androstane-3alpha,17 beta-diol,5 beta-Androstane-3 alpha,17 beta-diol,5-Androstane-3,17-diol,5alpha-Androstane-3beta,17alpha-diol,5 alpha Androstane 3 alpha,17 beta diol,5 alpha Androstane 3 beta,17 alpha diol,5 alpha Androstane 3 beta,17 beta diol,5 alpha Androstane 3alpha,17 beta diol,5 beta Androstane 3 alpha,17 beta diol,5alpha Androstane 3beta,17alpha diol,Androstane 3,17 diol
D051381 Rats The common name for the genus Rattus. Rattus,Rats, Laboratory,Rats, Norway,Rattus norvegicus,Laboratory Rat,Laboratory Rats,Norway Rat,Norway Rats,Rat,Rat, Laboratory,Rat, Norway,norvegicus, Rattus

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