Androstenedione - an overview | ScienceDirect Topics
Androstenedione is an anabolic androgenic steroid used to increase blood testosterone levels for the purposes of increasing strength, lean body mass and sexual performance. However, there is no research indicating that androstenedione, or its related compounds, significantly increases strength and/or lean body mass in humans by increasing ...
Androstenedione - an overview | ScienceDirect Topics
Androstenedione is another androgen produced by the adrenal gland and testes; it is a precursor of estrogen and testosterone (as well as dihydrotestosterone) and is found in Scotch pine tree pollen. 84–86 Androstenedione is available in Europe as a nasal spray and is used in the United States in a pill form. It is used as a T-booster in hope ...
Androstenedione - an overview | ScienceDirect Topics
Androstenedione. In subject area: Neuroscience. Androstenedione is a banned substance in sports due to its ability to enhance performance by disrupting the balance between testosterone and epitestosterone, leading to a higher testosterone ratio that can result in penalties for athletes if detected above a certain level.
Androstenedione - an overview | ScienceDirect Topics
Androstenedione. Due to its anabolic effects, many individuals use androstenedione as a dietary supplement. Though widely available over the counter or by mail order in America and Europe, androstenedione is easily accessible [62]. Androstenedione is an androgen steroid hormone that is an intermediate in the biosynthesis of testosterone from ...
Androstenedione Blood Level - an overview - ScienceDirect
The serum androstenedione concentration was low-normal at 53 ng/dL (normal range, 30–200), and the serum concentration of 17-hydroxyprogesterone was undetectable. She was advised that her dexamethasone dose was excessive and it was gradually decreased to 0.25 mg daily, at which point her serum androstenedione concentrations were mid-normal.
Androstenedione - an overview | ScienceDirect Topics
Androstenedione. In subject area: Chemistry. Androstenedione is a weak androgen hormone that is secreted by the testis, ovary, and adrenal glands. It can be converted into the more potent testosterone in peripheral tissues. From: The Immunoassay Handbook (Fourth Edition), 2013.
Androstenedione - an overview | ScienceDirect Topics
Androstenedione is a banned substance that athletes use as a performance-enhancing agent. It disrupts the balance between testosterone and epitestosterone, leading to a higher ratio of testosterone. AI generated definition based on: The Sports Medicine Resource Manual, 2008. About this page. Add to Mendeley.
Androstenedione production by biotransformation of phytosterols
2008年10月1日 · Androstenedione is a key intermediate of microbial steroid metabolism. It belongs to the 17-keto steroid family and is used as starting material for the preparation of different steroids. Androstenedione can be produced by microbial side chain cleavage of phytosterol, which is an alternative to multi-step chemical synthesis.
Androstanedione - an overview | ScienceDirect Topics
Adrenals secrete large amount of DHEA, which are converted into androstenedione (4-dione) then into potent androgens and/or estrogens in peripheral tissues (Labrie, Luu-The, Labrie, & Simard, 2001; Labrie et al., 1997). In peripheral tissues, the biosynthesis of active androgens and estrogens is synthesized from DHEA by three steroidogenesis ...
Basics of androgen synthesis and action - ScienceDirect
2022年7月1日 · Basics of androgen synthesis and action. Androgens are essential sex steroid hormones for both sexes. Testosterone (T) is the predominant androgen in males, while in adult females, T concentrations are about 15-fold lower and androgen precursors are converted to estrogens. T is produced primarily in testicular Leydig cells in men, while in ...