androstenedione


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Related to androstenedione: DHEA, androstenediol

androstenedione

 [an″dro-stēn´de-ōn]
an androgen, C19H30O2, less potent than testosterone, secreted by the testis, ovary, and adrenal cortex.

an·dro·stene·di·one

(an'drō-stēn'dī-ōn),
Androstanedione with a double bond between C-4 and C-5; an androgenic steroid of weaker biologic potency than testosterone; secreted by the testis, ovary, and adrenal cortex.

androstenedione

/an·dro·stene·di·one/ (-di-ōn) an androgenic steroid produced by the testis, adrenal cortex, and ovary; converted metabolically to testosterone and other androgens.

androstenedione

(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.

androstenedione

An androgenic steroid less potent than testosterone, which is produced by the adrenal cortex, ovary and testis and converted to estrone in fat and the liver; in men, overproduction of androstendione may cause feminisation.
 
Increased in
Cushing syndrome; ovarian, testicular or adrenocortical tumours; adrenal hyperplasia; polycystic ovary disease.

Decreased in
Hypogonadism, Addison’s disease.
 
Specimen
Serum.
 
Ref range
Women (premenopausal)—0.5–3 ng/mL; women (postmenopausal)—0.3-8 ng/mL; men—0.9–1.7 ng/mL.

androstenedione

An androgenic steroid, less potent than testosterone, which is produced by the adrenal cortex and gonads, and converted to estrone in fat and the liver; in ♂, overproduction of androstendione may cause feminization; androstenedione is ↑ in Cushing syndrome, ovarian, testicular, or adrenocortical tumors, adrenal hyperplasia, polycystic ovary disease; it is ↓ in hypogonadism, Addison's disease

an·dro·stene·di·one

(an'drō-stēn'dī-ōn)
An androgenic steroid of weaker biologic potency than testosterone; secreted by the testis, ovary, and the cortex of the suprarenal gland.
See also: performance enhancing drug

Androstenedione

Also called "andro," this hormone occurs naturally during the making of testosterone and estrogen.
Mentioned in: Anabolic Steroid Use

androstenedione (anˑ·drō·steˈ·n·dīˈ·ōn),

n a biochemical precursor to both estrogen and testosterone. Used as a dietary supplement because it is believed to boost testosterone levels and claimed to increase athletic performance and muscle mass. It increases estrogen levels more than testosterone, may interfere with hormone levels, and may heighten the risk of hormone-sensitive cancers or cancers of the liver.

androstenedione

an androgenic steroid produced by the testis, adrenal cortex and ovary. Immunization against it gives excellent results in promoting fertility in ewes by increasing the twinning rate.

Patient discussion about androstenedione

Q. What is the difference between ADD and ADHD? My Son has been diagnosed with ADD. Is this the same as ADHD?

A. Here is the general description:
ADHD: Think of these types of children as the energizer bunnies in constant motion. They tend to move about excessively, fidgeting and squirming, and always into things. Remaining seated when expected to is often an impossible task.
ADD: Children with predominately inattentive behaviors, more commonly referred to as ADD, may act very differently. These are the “daydreamers.” They may appear spacey, forgetful, and distracted. They move from one activity to the next, never quite able to complete a task. Often times they begin a task without waiting for the directions and end up frustrated and uncertain. They may seem rather messy, careless and disorganized.

Q. Is there any connection between ADD and Autism? I refer to ADD, not ADHD

A. there is a theory that ADD and learning disabilities are a "continuum" up to Asperger syndrome and autism. due to similarities in brain function and symptoms. mind you- it's a theory.

Q. What is the difference between ADD and ADHD? I know that H stands for hyperactivity, but what does it mean by symptoms? does It have the same treatment?

A. They differ by ADHD kids tend to move around all the time (not like ADD who can sit but not listen), and they are more then careless. They tend to injure themselves over childhood. <br>I saw a nice video that explains about those disorders! <br><object width='425' height='355' id='FiveminPlayer'><param name='allowfullscreen' value='true'/><param name='movie' value='http://www.5min.com/Embeded/5538/'/><embed src='http://www.5min.com/Embeded/5538/' type='application/x-shockwave-flash' width='425' height='355' allowfullscreen='true'></embed></object>
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More discussions about androstenedione
References in periodicals archive ?
Yalcinkaya and his colleagues first discovered that ovarian tissue from hyenas does not produce much testosterone; instead, it releases lots of an inactive chemical, called androstenedione, that enzymes can convert to either testosterone or estrogen.
In my review of the available information on androstenedione (14), the intricacies of the feedback mechanism remain elusive.
Forbes has received several requests from major pharmaceutical companies for production samples of Androstenedione (AD), a fine chemical intermediate used in the production of various steroid-based pharmaceuticals.
Some of the majorly marketed sports supplements are androstenedione (natural steroids that can be broken down into testosterone), creatine (most effective for athletes doing intermittent high-intensity exercise with short recovery intervals such as sprinting and power lifting) and fat burners (acting as a stimulant which increases metabolism and helps in reducing weight).
This was a surprising finding indicating certain androgens, particularly testosterone and androstenedione, appear to have more of an effect on blood vessel development compared to dihydrotestosterone.
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.
In bovine theca cells, arachidonic acid modulated androstenedione secretion, which suggests an indirect effect of omega-3 fatty acids through the displacement of, or increased competition with, omega-6 fatty acids.
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.
Second, Androstenedione (Andro) which is an androgenic steroid produced by the testes, adrenal cortex, and ovaries.
The July 2010 article "Liquid Chromatography-Tandem Mass Spectrometry Assay for Androstenedione, Dehydroepiandrosterone, and Testosterone with Pediatric and Adult Reference Intervals" by Mark M.
The adrenal glands are also a source of androgens, specifically androstenedione and dehydroepiandrosterone (DHEA), but production is minimal compared to the gonads.