androstenedione


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Related to androstenedione: DHEA, androstenediol

an·dro·stene·di·one

 (ăn′drə-stēn′dī′ōn)
n.
An unsaturated androgenic steroid, C19H26O2, that is secreted by the testis, ovary, and adrenal cortex and is a precursor of both androgens and estrogens. Until 2005, when its nonprescription sale and use became illegal in the United States, synthetic androstenedione was used as a dietary supplement to enhance athletic performance.

Translations
androstediona
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References in periodicals archive ?
The study also showed null movement in the hormones DHEA, cortisol, and androstenedione in saliva samples.
Androstenedione is considered a weak androgen in men and is secreted primarily by the testes.
8]) as well as unlabeled androstenedione, testosterone, and 17-OHP were obtained from Cerilliant.
In the trial, the inhibitory potency of saw palmetto supercritical CO2 extract (SPSE) was compared to that of finasteride, an approved 5[alpha]-reductase inhibitor, on the basis of the enzymatic conversion of the substrate androstenedione to the 5[alpha]-reduced product 5[alpha]-androstanedione.
The main hormone produced from 17[alpha]-hidroxiprogesterone is androstenedione, which can be converted to testosterone by the isoenzyme 17[beta]-hidroxisteroide deidrogenase (HSD17B) in theca cells or to estrone by aromatase (CYP19A1) in granulosa cells.
17-[beta]-HSD3 is expressed almost exclusively in the testis and where it helps to produce the male sex hormone by converting the inactive [DELTA]4C19 steroid androstenedione to the active androgen testosterone.
Although, sports supplements are used to enhance performance of the athletic, some of the sports organizations such as The National Football League (NFL), the National Collegiate Athletic Association (NCAA) and the International Olympic Committee (IOC) have banned use of certain supplements such as steroids, ephedra and androstenedione by their athletes.
Figure 1 shows the correlation of macrophage counts and vascularity (y-axis) in fibrous tissue surrounding TCP ceramic implants loaded with testosterone, dihydrotestosterone, androstenedione, and control.
7-mg deslorelin acetate implants on egg production and plasma concentrations of 17[beta]-estradiol and androstenedione in Japanese quail (Coturnix coturnix japonica) over 180 days and assess safety of the implants in quail via gross and histologic examination.
hypothesized that the increased testosterone levels were caused either by increased activity of an enzyme that produces testosterone or by decreased activity of an enzyme that reduces testosterone, specifically Hsd17b2, which converts testosterone to a less potent androgen, androstenedione.
However, the nocturnal rise for cortisol, androstenedione and DHEA appeared earlier, and the plasma levels of thyroid hormones, estradiol and DHEA-S were lower during the recovery experiment than in the control experiment.
Specifically, we investigated the expression of Cx43, a gap junctional protein, in normal and androstenedione-induced PCO, the effects of androstenedione on Cx43 expression, GJIC, and progesterone production in vitro.