Androstenedione (also known as 4-androstenedione) is a 19-carbon steroid hormone produced in the adrenal glands and the gonads as an intermediate step in the biochemical pathway that produces the androgen testosterone and the estrogens estrone and estradiol. The regulation of therapeutic goods, that is drugs and therapeutic devices, varies by jurisdiction. ... In pharmacology and toxicology, a route of administration is the path by which a drug, fluid, poison or other substance is brought into contact with the body 1. ... General Name, symbol, number carbon, C, 6 Chemical series nonmetals Group, period, block 14, 2, p Appearance black (graphite) colorless (diamond) Standard atomic weight 12. ... Steroid skeleton of lanosterol. ... Norepinephrine A hormone (from Greek όρμή - to set in motion) is a chemical messenger from one cell (or group of cells) to another. ... In mammals, the adrenal glands (also known as suprarenal glands) are the triangle-shaped endocrine glands that sit on top of the kidneys; their name indicates that position (ad-, near or at + -renes, kidneys). They are chiefly responsible for regulating the stress response through the synthesis of corticosteroids and catecholamines... The gonad is the organ that makes gametes. ... Biochemistry is the study of the chemical processes and transformations in living organisms. ... Androgen is the generic term for any natural or synthetic compound, usually a steroid hormone, that stimulates or controls the development and maintenance of masculine characteristics in vertebrates by binding to androgen receptors. ... Testosterone is a steroid hormone from the androgen group. ... Estriol. ... Estrone (also oestrone) is an estrogenic hormone secreted by the ovary. ... Estradiol (17β-estradiol) (also oestradiol) is a sex hormone. ...

Synthesis

the common precursor of male and female sex hormones. Some androstenedione is also secreted into the plasma, and may be converted in peripheral tissues to testosterone and estrogens. A protein precursor is an inactive protein (or peptide) that can be turned into an active form by posttranslational modification. ... Sex hormones are hormones that affect the reproductive system. ... Blood plasma is the liquid component of blood, in which the blood cells are suspended. ...

Androstenedione originates either from the conversion of dehydroepiandrosterone or from 17-hydroxyprogesterone. It is further converted to either testosterone or estrone. Dehydroepiandrosterone (DHEA), is a natural steroid prohormone produced from cholesterol by the adrenal glands, the gonads, adipose tissue, brain and in the skin (by an autocrine mechanism)]. DHEA is the precursor of androstenedione, testosterone and estrogen. ... 17-hydroxyprogesterone ( also 17-OH progesterone, or 17OHP))is a C-21 steroid that is derived from progesterone by 17-hydroxylase, a P450c17 enzyme, and is a prohormone for both glucocorticoids and androstenedione, a precursor for sex steroids. ... Testosterone is a steroid hormone from the androgen group. ... Estrone (also oestrone) is an estrogenic hormone secreted by the ovary. ...

The production of adrenal androstenedione is governed by ACTH, while production of gonadal androstenedione is under control by gonadotropins. In premenopausal women the adrenal glands and ovaries each produce about half of the total androstendione (about 3 mg/day). After menopause androstenedione production is about halved, primarily due to the reduction of steroid secreted by the ovary. Nevertheless, androstenedione is the principal steroid produced by the postmenopausal ovary. Adrenocorticotropic hormone (ACTH or corticotropin) is a polypeptide hormone secreted from corticotropes in the anterior lobe of the pituitary gland in response to corticotropin-releasing hormone (CRH) released by the hypothalamus. ... Gonadotropins are protein hormones secreted by gonadotrope cells of the pituitary gland of vertebrates. ... Menopause is the physiological cessation of menstrual cycles associated with advancing age in women. ...

Androstenedione as a supplement

Androstenedione was manufactured as a dietary supplement, often called andro (or andros) for short. Andro was in common use in Major League Baseball throughout the 1990s by record breaking sluggers like Mark McGwire, but it is unknown (and unknowable) to what extent andro was responsible for McGwire's exceptional performance. The supplement is banned by the World Anti-Doping Agency, and hence from the Olympic Games. A dietary supplement is intended to supply nutrients, (vitamins, minerals, fatty acids or amino acids) that are missing or not consumed in sufficient quantity in a persons diet. ... MLB and Major Leagues redirect here. ... For the band, see 1990s (band). ... Mark David McGwire (born October 1, 1963 in Pomona, California) is a former professional baseball player who played the majority of his major league career with the Oakland Athletics before finishing his final years with the St. ... The World Anti-Doping Agency (WADA) is an independent foundation created through a collective initiative led by the International Olympic Committee (IOC). ... The five Olympic rings were designed in 1913, adopted in 1914 and debuted at the Games at Antwerp, 1920. ...

On March 12, 2004, the Anabolic Steroid Control Act of 2004 was introduced into the United States Senate. It amended the Controlled Substance Act to place both anabolic steroids and prohormones on a list of controlled substances, making possession of the banned substances a federal crime. The law took effect on January 20, 2005. is the 71st day of the year (72nd in leap years) in the Gregorian calendar. ... Year 2004 (MMIV) was a leap year starting on Thursday of the Gregorian calendar. ... The Controlled Substances Act (CSA), Title II of the Comprehensive Drug Abuse Prevention and Control Act of 1970, is the legal foundation of the United States governments fight against the abuse of drugs and other substances. ... A prohormone is a chemical compound that is a precursor to an actual hormone (usually an anabolic like testosterone or some variant), which is taken in order to boost the body’s available hormone supply. ... Wikipedia does not yet have an article with this exact name. ... January 20 is the 20th day of the year in the Gregorian calendar. ... Year 2005 (MMV) was a common year starting on Saturday (link displays full calendar) of the Gregorian calendar. ...

On April 11, 2004, the United States Food and Drug Administration banned the sale of Andro, citing that the drug poses significant health risks commonly associated with steroids. is the 101st day of the year (102nd in leap years) in the Gregorian calendar. ... Year 2004 (MMIV) was a leap year starting on Thursday of the Gregorian calendar. ... hi “FDA” redirects here. ...

Conversion to estrone

Because androstenedione is converted in part to estrogens, persons taking this supplement may have estrogenic side effects. A visible problem could be gynecomastia (formation of breast tissue) in males. Gynecomastia, or gynaecomastia, pronounced is the development of abnormally large mammary glands in males resulting in breast enlargement, which can sometimes cause secretion of milk. ...

Additional images

Steroidogenesis Image File history File links Size of this preview: 462 × 600 pixel Image in higher resolution (804 × 1044 pixel, file size: 19 KB, MIME type: image/gif)self created I, the creator of this work, hereby grant the permission to copy, distribute and/or modify this document under the terms... Steroidogenesis is the process of steroid production in living organism. ...	Conversion of Androstendione to Estrone Wikipedia does not have an article with this exact name. ... Estrone (also oestrone) is an estrogenic hormone secreted by the ovary. ...	Dehydroepiandrosterone Image is drawn in bkchem and GIMP. File links The following pages link to this file: Dehydroepiandrosterone Categories: Public domain images ... Dehydroepiandrosterone (DHEA), is a natural steroid prohormone produced from cholesterol by the adrenal glands, the gonads, adipose tissue, brain and in the skin (by an autocrine mechanism)]. DHEA is the precursor of androstenedione, testosterone and estrogen. ...	17-Hydroxyprogesterone Image File history File links Size of this preview: 800 × 540 pixelsFull resolution (854 × 576 pixel, file size: 12 KB, MIME type: image/png) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... 17-hydroxyprogesterone ( also 17-OH progesterone, or 17OHP))is a C-21 steroid that is derived from progesterone by 17-hydroxylase, a P450c17 enzyme, and is a prohormone for both glucocorticoids and androstenedione, a precursor for sex steroids. ...
Testosterone Image File history File links Testosterone_structure. ... Testosterone is a steroid hormone from the androgen group. ...	Estrone Image File history File links Estrone. ... Estrone (also oestrone) is an estrogenic hormone secreted by the ovary. ...

External links

• Information on Steroid Control Act and Ban on Pro-Hormones
• Anabolic steroid control act of 2004
• [1]NLM classification of hormones