HOME >> MEDICINE >> NEWS
Animal models show that anabolic steroids flip the adolescent brain's switch for aggression

Anabolic steroids not only make teens more aggressive, but may keep them that way into young adulthood. The effect ultimately wears off but there may be other, lasting consequences for the developing brain. These findings, published in February's Behavioral Neuroscience, also showed that aggression rose and fell in synch with neurotransmitter levels in the brain's aggression control region. Behavioral Neuroscience is published by the American Psychological Association (APA).

Neuroscientists are deeply concerned about rising adolescent abuse of anabolic-androgenic steroids (AASs), given the National Institute on Drug Abuse's estimate that nearly half a million eighth- and 10th-grade students abuse AASs each year. Not only do steroids set kids up for heavier use of steroids and other drugs later in life, but long-term users can suffer from mood swings, hallucinations and paranoia; liver damage; high blood pressure; as well as increased risk of heart disease, stroke and some types of cancer. Withdrawal often brings depression, and recent research suggests that some AASs may even be habit-forming.

Overseen by Richard Melloni Jr., PhD, of Northeastern University in Boston, the current study of 76 adolescent hamsters compared how individual hamsters behaved when another hamster was put into their cages. Normally mild-mannered hamsters still defend their turf, learning aggression during puberty by play-fighting, much like humans. Their roughhousing normally includes wrestling and nibbling pretty tame stuff.

However, hamsters injected with commonly used steroids (suspended in oil) became extremely aggressive. Even after the drug was withdrawn, the newly vicious hamsters attacked, bit and chased the intruders. In fact, their aggressiveness measured ten times greater than that of control hamsters injected with oil only. Their full-blown aggression clearly drug-induced -- lasted for nearly two weeks of withdrawal, the equivalent of half
'"/>

Contact: Pam Willenz
public.affairs@apa.org
American Psychological Association
26-Feb-2006


Page: 1 2 3

Related medicine news :

1. Animal study leading to new treatments for hemorrhagic shock and uncontrolled abdominal hemorrhage
2. Animal study identifies promising new target for brain tumor therapy
3. Animal BiP levels determine amount of recovery sleep needed following prolonged wakefulness
4. Animal studies suggest vegetables may reduce hardening of arteries
5. Animal research suggests perimenopause is a critical time for womens health
6. Animal disease reports to be released at July 18 news conference at AVMA convention
7. Animal research suggests new treatment target for epilepsy
8. Animal model demonstrates course of epilepsy
9. Latest IPCC report highlights need for integrated climate/human behavior models
10. Dopamine imbalances cause sleep disorders in animal models of Parkinsons disease and schizophrenia
11. Proteins spur diabetic mice models to grow blood vessels, nerves

Post Your Comments:
(Date:8/1/2014)... plays a central role in regulating appetite and whole-body ... the brain,s control of food intake and body weight, ... has been unclear. A new study in ... PPARγ activity in a type of neuron known as ... to high-fat diet. Sabrina Diano and colleagues at ...
(Date:8/1/2014)... News) -- Almost 140 people die every year ... United States. But there are several simple ... injury prevention coordinator at Cincinnati Children,s Hospital Medical ... medical center news release. "As families begin ... important for parents and children to go over ...
(Date:8/1/2014)... Chicago, Illinois (PRWEB) August 01, 2014 ... filed across the country, Ronald E. Johnson, Jr. has ... injured by AndroGel and other testosterone medications. Since the ... & Johnson, P.S.C. have worked diligently to investigate and ... strokes, pulmonary embolisms, and blood clots as a result ...
(Date:8/1/2014)... (PRWEB) August 01, 2014 Market ... research reports have been added to its catalogue. ... Active Pharmaceutical Ingredients (APIs), Contract Research and Manufacturing ... key pharma industry drivers include, among others, increasing ... personal hygiene. In 2015, the pharma market in ...
(Date:8/1/2014)... HealthDay Reporter FRIDAY, Aug. 1, ... a time-honored destination for a good cut and conversation. ... be the spot to tackle an often overlooked health concern: ... partnership, the U.S. Centers for Disease Control and Prevention, together ... help of barbershop staff to both discuss and diagnose high ...
Breaking Medicine News(10 mins):Health News:Expert Offers School Bus Safety Tips 2Health News:Ron Johnson Named Co-Lead Counsel in Lawsuits for Men Injured by AndroGel and Testosterone 2Health News:In-demand Markets Research Reports by Kelly Scientific Publications Now Available at MarketPublishers.com 2Health News:In-demand Markets Research Reports by Kelly Scientific Publications Now Available at MarketPublishers.com 3Health News:Barbershops Join Fight Against High Blood Pressure in Black Men 2Health News:Barbershops Join Fight Against High Blood Pressure in Black Men 3
(Date:8/1/2014)... , Aug. 1, 2014 RoundTable ... focused exclusively on the healthcare industry, announced today ... The Lubrizol Corporation ("Lubrizol"). Lubrizol, a Berkshire Hathaway ... and supplies technologies to customers in the global ... transaction were not disclosed. Vesta is ...
(Date:8/1/2014)... Minn. , Aug. 1, 2014 ... medical technologies company, announced today that it has ... held manufacturer of cardiorespiratory diagnostic products based in ... MediSoft has served the European cardiorespiratory diagnostics market ... 2013 revenues of approximately €4.7 million ($6.3 million) ...
(Date:8/1/2014)... , Aug. 1, 2014 Dyadic International, Inc. ... and proprietary technologies are used to develop, manufacture and ... chemical, biopharmaceutical and industrial enzyme industries, announced today that ... quarter ended June 30, 2014 after market close on ... call that day at 5:00 p.m. Eastern Time to ...
Breaking Medicine Technology:RoundTable Healthcare Partners Announces Sale of Vesta Funding, Inc. to The Lubrizol Corporation 2MGC Diagnostics Corporation Completes Acquisition of MediSoft SA 2MGC Diagnostics Corporation Completes Acquisition of MediSoft SA 3MGC Diagnostics Corporation Completes Acquisition of MediSoft SA 4Dyadic International To Announce Second Quarter 2014 Financial Results And Host Conference Call On Thursday, August 14, 2014 2Dyadic International To Announce Second Quarter 2014 Financial Results And Host Conference Call On Thursday, August 14, 2014 3
Cached News: