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The androgen backdoor pathways occur without the involvement of testosterone (T) and/or androstenedione (A4), which are part of the conventional, canonical (classic) [30] [31] [11] androgenic pathway. [15] In the canonical pathways of androgen biosynthesis, DHT is synthesized from T via 5α-reduction, so that 5α-reduction of T, a C
Schematic diagram of the androgen biosynthesis via the canonical, backdoor, and 11-oxyback door pathways ... Added the 11-oxy backdoor pathway is also important in ...
English: Will update with all enzyme names once diagram is checked for accuracy. Date: 5 February 2021: Source: Own work: Author: ... The androgen backdoor pathway ...
The androgen backdoor pathway (red arrows) roundabout testosterone embedded in within conventional androgen synthesis that lead to 5α-dihydrotestosterone through testosterone [27] [28] [29] CAH is a genetic disorder characterized by impaired production of cortisol in the adrenal glands. [1] [4] Production of cortisol begins at week 8 of fetal ...
The androgen backdoor pathway (red arrows) roundabout testosterone embedded in within conventional androgen synthesis that lead to 5α-dihydrotestosterone through testosterone. [ 7 ] [ 8 ] [ 9 ] 5α-Pregnan-17α-ol-3,20-dione (17-OH-DHP) is a progestogen , i.e., it binds to the progesterone receptors .
5α-Reductase (1, 2, 3) – androgen and neurosteroid synthesis, progestogen metabolism; 5β-Reductase – androgen and progestogen metabolism, neurosteroid synthesis; Conjugation (and deconjugation) Glucuronosyltransferase – steroid metabolism [6] Glucuronidase (β-glucuronidase) – steroid synthesis [7]
Ignoring this pathway in such instances may lead to diagnostic pitfalls and confusion, [66] when the conventional androgen biosynthetic pathway cannot fully explain the observed consequences. [64] As with the conventional pathway of DHT synthesis, the backdoor pathway similarly requires 5α-reductase. [63]
The lyase activity of CYP17A1 converts intermediates like 3,11diOH-DHP4 to potent androgens such as 5α-pregnan-3α,11β,17α-triol-20-one (11OH-Pdiol). These findings indicate that CYP17A1 plays a role in the metabolism of this steroid through both hydroxylation and lyase reactions in the 11-oxygenated steroid backdoor pathway to androgens.