HOME >> BIOLOGY >> NEWS
Testosterone, stress may not suppress immune system after all

Testosterone has been blamed for everything from the muscular prose of Ernest Hemingway to Wall Street greed to the invention of ice hockey. But the biggest rap against the hormone comes from the biomedical world, which long has maintained a correlation between elevated testosterone levels and a suppressed immune system. After all, males across species die earlier than females and are more prone to stress and disease.

Now a biologist at Washington University in St. Louis is suggesting a completely different role for the hormone that made John Travolta and John Wayne famous. Stanton Braude, Ph.D., a lecturer in biology in Arts and Sciences, analyzed a number of studies that focused on the phenomenon whereby bright or showy male animals advertise their disease resistance. For instance, a male bird, during mating season, will display showy feathers to let females know that he is healthy -- resistant to parasites -- and would be a good mate. This evolutionary trick could be likened to Travolta gliding on the dance floor or the Duke strutting through a saloon to talk to the bar maid. These studies, however, revealed a paradox: testosterone, a long-assumed immunosuppressive, is also known to trigger the sexual display. How, Braude asked, could an immunosuppressive play such a vital role?

"The whole idea that testosterone and stress suppress the immune system makes absolutely no sense evolutionarily," says Braude. "Why would we have evolved to shut off immunity when that's so important to keep us healthy? I began to search for another mechanism for testosterone."

Braude came across a new body of research -- about a dozen studies in all over the past five years -- that questions the whole idea of immunosuppression and suggests that, instead of suppressing the immune system, testosterone and other steroids play a key role in what's called immunoredistribution.

"The redistribution hypothesis predicts that when you are under stress the total number o
'"/>

Contact: Tony Fitzpatrick
tony_fitzpatrick@aismail.wustl.edu@internet
314-935-5272
Washington University in St. Louis
4-Oct-1999


Page: 1 2 3 4

Related biology news :

1. UCSD team determines cellular stress within body is critical
2. Genetic basis for individual variations in the response to stress
3. Memory fails you after severe stress
4. Need sex? Its probably something about stress
5. Mix of chemicals plus stress damages brain, liver in animals and likely in humans
6. Researchers-again-pinpoint why stress kills
7. Social stress adversely affects digestive function in subordinate cichlid fish
8. Hebrew University, German and British researchers develop means to help stress sufferers
9. A little stress may be good for you
10. Estrogen promotes gender differences in brains response to stress
11. Study finds new mothers are resistant to stress

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Testosterone stress may not suppress immune system after all

(Date:1/22/2015)... , Jan. 9, 2015 Valid S.A. ("Company") (BM&FBOVESPA: VLID3 ... in general the State of Washington,s ... a new enrollment and central issuance system for driver,s licenses ... The project planning and development will start in January ...
(Date:1/22/2015)... 13, 2015 Technology Showcase, Hall E -   EyeLock ... today announced it will showcase its EyeLock ID technology integrated ... Department of Energy,s Oak Ridge National Laboratory (ORNL) ... EyeLock,s iris identity authentication technology is being used to validate ...
(Date:1/22/2015)... 2015 NXT-ID, Inc. (NASDAQ: NXTD and NXTDW) a ... the recent success of the Wocket™ smart wallet at CES 2015 in ... was named as one of the "11 Hot Products at CES" in ... At CES So Far" by Newseveryday.com and "The top 10 gadgets from ...
Breaking Biology News(10 mins):Valid USA Signs Contract For Washington Driver's License Issuance 2EyeLock Debuts First Iris Authentication Technology Embedded in 3D Printed Automobile 2EyeLock Debuts First Iris Authentication Technology Embedded in 3D Printed Automobile 3CES Response for NXT-ID's Wocket Smart Wallet Kicks Off 2015 2CES Response for NXT-ID's Wocket Smart Wallet Kicks Off 2015 3
(Date:1/22/2015)... GEA Niro Soavi the leader in high pressure ... 2000, which is ideal for new applications for processing ... . This compact laboratory homogenizer is the perfect solution ... additives and ingredients as well as for the ...
(Date:1/22/2015)... 22, 2015 Protocol Networks brings independent ... team of brand-neutral, independent consultants, Protocol Networks has recently ... that over the years, his company has attracted several ... of Plainfield, as well as others. With the success ...
(Date:1/22/2015)... Dr. Greg Leyer of UAS Labs recently ... Supplements Pre-Conference seminar on probiotics in San Diego, CA. ... education conference for health care professionals. This year’s pre-conference seminar ... probiotics in health. Dr. Leyer spoke about the emerging topics ...
(Date:1/22/2015)... NEW BRUNSWICK , Nueva Jersey , 22 ... Award for Biomedical Research abre hoy su llamada ... las personas cuya investigación científica ha hecho, o tiene ... de la salud humana. Las nominaciones se aceptarán hasta ...
Breaking Biology Technology:GEA Niro Soavi Announces the PandaPLUS 2000 Homogenizer for Processing New Applications for Nanoemulsions and Cell Disruption 2Protocol Networks Brings Independent Technology Consulting to the Constitution State 2El Dr. Paul Janssen Award for Biomedical Research emite su llamada a los nominados para 2015 2El Dr. Paul Janssen Award for Biomedical Research emite su llamada a los nominados para 2015 3El Dr. Paul Janssen Award for Biomedical Research emite su llamada a los nominados para 2015 4
Cached News: