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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
removed 11KT since it is not a significant product of the 11-oxy backdoor pathway: 17:21, 18 February 2024: 1,200 × 675 (365 KB) Boghog: Reverted to version as of 11:25, 17 February 2024 (UTC) 14:08, 18 February 2024: 1,200 × 675 (371 KB) Boghog: Added the 11-oxy backdoor pathway is also important in healthy females: 11:25, 17 February 2024: ...
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 .
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 ...
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Therefore, androstanediol can be used a marker of the backdoor pathway of DHT synthesis. [11] Spectrometric studies identify androsterone as the main backdoor androgen in the human male fetus. Circulating levels are sex dependent, DHT being essentially absent in the female, in which titres of backdoor intermediates also are very low. [12]
In 21-hydroxylase deficiency, especially in mild cases (LOCAH), the androgen "backdoor" pathway [18] may be the reason of androgen excess. [54] This backdoor pathway is not always considered in the clinical evaluation of patients with hyperandrogenism conditions such as LOCAH and may be a source of diagnostic pitfalls and confusion. [55]
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]