Ad
related to: dhea and androstenedione wikipedia in romana hd gratis full
Search results
Results From The WOW.Com Content Network
Levels of DHEA-S in circulation are approximately 250 to 300 times those of DHEA. [20] DHEA-S in turn can be converted back into DHEA in peripheral tissues via steroid sulfatase (STS). [54] [55] The terminal half-life of DHEA is short at only 15 to 30 minutes. [56] In contrast, the terminal half-life of DHEA-S is far longer, at 7 to 10 hours. [56]
Androstenedione, or 4-androstenedione (abbreviated as A4 or Δ 4-dione), also known as androst-4-ene-3,17-dione, is an endogenous weak androgen steroid hormone and intermediate in the biosynthesis of estrone and of testosterone from dehydroepiandrosterone (DHEA). It is closely related to androstenediol (androst-5-ene-3β,17β-diol).
Androstanedione, also known as 5α-androstanedione or as 5α-androstane-3,17-dione, is a naturally occurring androstane (5α-androstane) steroid and an endogenous metabolite of androgens like testosterone, dihydrotestosterone (DHT), dehydroepiandrosterone (DHEA), and androstenedione. [1] It is the C5 epimer of etiocholanedione (5β ...
Cells in the zona reticularis produce precursor androgens including dehydroepiandrosterone (DHEA) and androstenedione from cholesterol. [2] DHEA is further converted to DHEA-sulfate via a sulfotransferase, SULT2A1. [3] These precursors are not further converted in the adrenal cortex if the cells lack 17β-Hydroxysteroid dehydrogenase.
[1] [2] It is the 3α-epimer of dehydroepiandrosterone (DHEA; androst-5-en-3β-ol-17-one) and the 5(6)-dehydrogenated and non-5α-reduced analogue of androsterone (5α-androstan-3α-ol-17-one). [2] DHA is produced in and secreted from the adrenal glands , along with other weak androgens like DHEA, androstenediol , and androstenedione .
Androstenedione (4-androstenedione, A4) 4-Androstenedione – Atamestane: 1-Methyl-δ 1-4-androstenedione – Boldione (1,4-androstadienedione) δ 1-4-Androstenedione – Dehydroepiandrosterone (DHEA, 5-DHEA; prasterone, androstenolone) 5-Dehydroepiandrosterone Exemestane: 6-Methylidene-δ 1-4-androstenedione Formestane: 4-Hydroxy-4 ...
Dehydroepiandrosterone (DHEA), DHEA sulfate (DHEA-S), and androstenedione may all be considered proandrogens of testosterone. [ 1 ] In the last two decades, prohormones have also been used by bodybuilders, athletes, and nonmedical users of AAS and other hormones to refer to substances that are expected to convert to active hormones in the body.
3β-Hydroxysteroid dehydrogenase/Δ 5-4 isomerase (3β-HSD) (EC 1.1.1.145) is an enzyme that catalyzes the biosynthesis of the steroid progesterone from pregnenolone, 17α-hydroxyprogesterone from 17α-hydroxypregnenolone, and androstenedione from dehydroepiandrosterone (DHEA) in the adrenal gland.