anabolic steroid

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anabolic steroid

(ăn'əbŏl`ĭk stĕr`oid, stĭr`–) or

androgenic steroid

(ăn'drōjĕn`ĭk), any of a group of synthetic derivatives of testosteronetestosterone
, principal androgen, or male sex hormone. One of the group of compounds known as anabolic steroids, testosterone is secreted by the testes (see testis) but is also synthesized in small quantities in the ovaries, cortices of the adrenal glands, and placenta, usually
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 that promote muscle and bone growth. Used to treat uncontrolled weight loss in wasting diseases, anabolic steroids have also been taken by bodybuilders and athletes seeking increased muscle mass, strength, and stamina. Such use is banned by the International Olympic Committee and other governing bodies in sports, but not all sports test for steroids. Major League Baseball did not test for steroids until 2003, when random testing returned positive results on more than 5% of the players tested, and the National Hockey League still does not test. Under a 1988 federal law it is illegal to distribute anabolic steroids for nontherapeutic uses, and in 1991 they joined other abused drugs as controlled substances. Nonetheless, a precursor hormone called dehydroepiandrosterone (DHEA), which can convert to testosterone in the body, is available as a dietary supplement without a prescription. Abuse of anabolic steroids may lead to elevated cholesterol levels, liver disease, blood clots leading to heart attack or stroke, increased aggressiveness and irritability, and, in adolescents, permanent stunting of growth. See also steroidssteroids,
class of lipids having a particular molecular ring structure called the cyclopentanoperhydro-phenanthrene ring system. Steroids differ from one another in the structure of various side chains and additional rings. Steroids are common in both plants and animals.
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.

anabolic steroid

[‚an·ə¦bäl·ik ′sti‚rȯid]
(biochemistry)
Any of a group of steroid hormones that increase anabolism.

anabolic steroid

any of a group of synthetic steroid hormones (androgens) used to stimulate muscle and bone growth for therapeutic or athletic purposes
References in periodicals archive ?
In February 2017 the PRAC started a review of oral, injectable and inhaled quinolone and fluoroquinolone antibiotics to evaluate the persistence of rare serious side effects mainly affecting muscles, joints and the nervous system, some of which may be of long duration.
Positive Negative of samples SNAPduo[TM] [beta]-lactam 100 * 17 83 ST Test and tetracyclic Charm ROSA Quinolone 99 ** 4 95 Test Charm ROSA Sulfonamide 99 ** 6 93 Test * Pasteurized milk samples; ** Unpasteurized milk samples.
Altering temperature, time, the amount of quinolone and Zn(OH)2 can effect the viscosity and ash content of the coal tar.
Co-author Professor Laura Piddock, of the Institute of Microbiology and Infection at the University of Birmingham, said: "The link between quinolone and triclosan resistance is important as triclosan has become ubiquitous in the environment and even human tissues in the last 20 years.
maltophilia genome sequence (R551-3) also identified a novel family of genes (smqnr) that encode proteins with homology to the Qnr quinolone protection proteins found in the Enterobacteriaceae (5).
Moreover, quinolones utilisation as alternatives in the treatment of brucellosis did not improve the results (Lopez-Merino et al.
Patel and colleagues (2012) reported a fourfold relative risk for infection in patients recently exposed to antimicrobials, while two other studies found a three-fold or greater incidence of acute prostatitis among men with quinolone exposure within six months prior to TRUS biopsy (Mosharafa, Torky, Said, & Meshref, 2011; Shigehara, Miyagi, Nakashima, & Shimamura, 2008).
Therefore, the present study was undertaken to investigate quinolone resistance within clinical isolates of enterobacteriaceae and plasmids responsible for their transfer.
So quinolone resistance of Escherichia coli isolated from geriatric age group in this study is chromosomal not plasmid mediated.
According to the FDA, 23 million outpatients were prescribed an oral quinolone in 2011.