Structural Biochemistry/Testosterone and the Anabolic-Androgenic Steroid (AASs)

Steroids are made up of many steroid rings, in which these rings consists of a combination of "one 5 carbon ring, and 3 six carbon rings" (Cholesterol being the primary structure), (Kishner, page 1). Steroids comprise of all the form acquired from the basic ring structure, one of them being testosterone and the anabolic-androgenic steroids (AASs).

How It Works

Anabolic steroids are synthetic versions of the male hormone testosterone, a driving force responsible for male characteristics like muscle growth, facial hair, voice deepening. As the body absorbs testosterone in the body, it fits into the receptor sites of cells and activates the cells. After the testosterone molecule enters the cell, protein synthesis and phosphate synthesis is significantly increased due to the addition of RNA polymerase. Phosphate synthesis allows for the production of additional creatine phosphate, which allows for greater amount of work in the absence of oxygen while an increased protein synthesis allows for increased transcription. Anabolic steroids also lead to greater nitrogen retention in the body. A positive nitrogen balance in the body is needed for muscle production since a negative nitrogen balance is created when strenuous forced is applied on the body. Since the body only produces about 2-10mg of testosterone per day and most AAS abusers use up to 1000mg of testosterone a week, it become very significant in its affect in muscle growth.

Testosterone

The human's main hormone that makes the androgenic (a compound that is made up of other compounds), which administer the growth and nurturing of the distinct male characteristics. It is a significant hormone because it help restore the health of tissues, and supply muscle mass (anabolic: represents testosterone and dihydrotestosterone). Therefore, both the ability of androgenic and anabolic gives testosterone a double action mechanism.

Throughout the years, biochemists have been trying to convert and adjust testosterone structure to make medications that can either be taken orally, or have a different breakdown when dissolved into the body, or even better, a drug that can do both. After many years of researching, scientists have come to the conclusion that by substituting and changing certain portion of the testosterone molecule, it may have a big impact on the effect; but unfortunately, it has not yet been discovered.

Uses

Testosterone and the anabolic-androgenic steroids have been use as treatments for these diseases:

Many types of anemia
HIV wasting syndrome
Osteoporosis
Severe burns
Acute and chronic burns
Malnutrition, weight loss
Short stature
Primary or secondary hypogonadism

(Stephen Kishner, page 1)

Although it has been used properly by some, many others have misused the drug for other purposes, such as to boost their normal anabolic and androgenic ability with the intension to better their physical image and strength.

Biochemistry and Pharmacology aspect

To improve the AAS research, biochemists have created an objective to alter the molecules to be "more anabolic and less androgenic" than testosterone, in which makes it possible to take orally, and have a reduce effect on the HPG axis (Stephen Kishner, page 3). According to an article called, Anabolic Steroids Use and Abuse, by Stephen Kishner, "AASs is developed from 3 compounds: testosterone, dihydrotestosterone, and 19-nortestosterone", (Kishner, page 3). (Testosterone and 19-nortestosterone is a very similar compound, very much alike except 19-nortestpsterone doesn't include the 19th carbon).

The earliest changes made to the compound was on the 17th carbon, by adding a methyl/ethyl group. This modification expand the half life of the drug and therefore, allowing the medication to be active and can be taken orally.

Downside

Although the revision was helpful in some ways, it also had consequences because this new compound was not exactly like the original. Due to the methyl/ethyl group added to the compound, liver stain was found as a result of the transformation. In addition, all of the carbon-17 added compound was effected, and caused chemical damages to the liver.(source needed)

Target Organs and Psychological Effects

CNS: increases libido, well-being, aggression, and spatial cognition
Hypothalamus/Pituitary Gland: decrease GnRH, LH, FSH, increase GH
Liver: decrease SHBG, HDL
Larynx: lower voice
Breast development
Kidney: increase erythropoietin

Genitals: increase development, spermatogenesis, erections

Prostate: increase in size, secretions
Skin: increase facial/ body hair, sebum production
Bone: increase BMD
Muscle: increase lean mass, strength
Adipose Tissue: increase lipolysis, decrease abdominal fat
Blood: increase hematocrit
Immune system: increase autoantibody production

References

Kishner, Stephen. "Anabolic Steroid Use and Abuse." Medscape. Emedicine, 6 July 2011. Web. 13 Dec. 2011.

Auchus, Richard J. MD, PhD. "The Science Of Anabolic Steroid Abuse." Utsoutwestern.edu. Web. 20 Oct, 2012

http://www.vanderbilt.edu/AnS/psychology/health_psychology/anabolic_steroids.html

Images: Wiki-Media Commons