Navigation Links
Stress Robs Skin of Antimicrobial Defenses
Date:11/2/2007

Researchers discover how it leads to 'nervous breakdown' in the epidermis

FRIDAY, Nov. 2 (Health Day News) -- A team of researchers has identified the biological mechanism by which stress increases susceptibility to skin infections.

"We have shown what stress does, the basis of the stress," said study author Dr. Peter Elias, a professor of dermatology at the University of California, San Francisco, and the VA Medical Center, San Francisco. Interestingly, it has nothing to do with the classic explanation of the immune system breaking down, he added.

Rather, it's a breakdown in the skin's antimicrobial defense, according to the study in the November issue of The Journal of Clinical Investigation.

Elias and his team subjected mice to psychological stress and found them more susceptible to group A Streptococcus pyogenes skin infections than mice kept under less stressful conditions.

The stressed-out mice showed a decrease in the expression of antimicrobial peptides by the skin's epidermis.

Streptococcal bacteria can cause many problems, such as skin infections, severe sore throats and even flesh-eating disease. The role of the peptides that Elias and his team studied have come to light in recent years, and it has been found that they are the "front line" of the immune system. They act like antibiotics, attacking bacteria and killing them.

In the study, Elias' team also found that the stress led to the increased production of glucocorticoids. This, in turn, inhibited the synthesis of fat in the skin's epidermis and reduced the secretion of vesicles containing antimicrobial peptides, setting up the mice for skin problems.

"What happens is, stress down-regulates the expression of two key families of antimicrobial peptides," Elias said. As that happened, skin infections became more severe in the animals.

When Elias' team blocked the production of the glucocorticoids, the skin's antimicrobial defenses returned to normal.

While many people think of the immune system's T-cells, which attack invaders, as the first line of defense, recent research suggests otherwise, Elias said. ""The antimicrobial defense mechanisms are so effective, they deal with 99.5 percent of all challenges by microbial pathogens, such as bad viruses, bad bacteria," he said.

In an accompanying commentary, Dr. Andrzej Slominski, of the University of Tennessee, wrote that "this study provides what I believe to be the first mechanistic link between psychological stress and increased susceptibility to microbial infection."

The research may eventually lead to new treatment options, such as topical medications that block excess glucocorticoid production.

More information

To learn more about skin conditions, visit the U.S. National Library of Medicine.



SOURCES: Peter Elias, M.D., professor, dermatology, University of California, San Francisco, VA Medical Center, San Francisco; November 2007, The Journal of Clinical Investigation


'/>"/>
Copyright©2007 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Stress reduces your immunity- startling but true!!!!!
2. Meditation relieves stress
3. New guidelines for dealing with post traumatic stress disorder
4. Meditation relieves stress
5. Stress can make you overweight
6. Stress response increases suicide risk
7. Avoid stress to have strong babies
8. Toddlers stressed out
9. Spirituality relieves stress
10. Alcohol injures stress hormone response
11. Self control makes stress response easy
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Stress Robs Skin of Antimicrobial Defenses
(Date:6/26/2016)... Aliso Viejo, California (PRWEB) , ... June 26, 2016 , ... ... for Final Cut Pro X. , "Film editors can give their videos a whole ... artistically," said Christina Austin - CEO of Pixel Film Studios. , ProSlice Levels ...
(Date:6/26/2016)... ... ... Kasmer, a legally blind and certified personal trainer is helping to develop a weight loss ... plans to fix the two major problems leading the fitness industry today:, ... , They don’t eliminate all the reasons people quit their exercise program ...
(Date:6/25/2016)... , ... June 25, 2016 , ... ... policy issues and applications at AcademyHealth’s Annual Research Meeting June 26-28, 2016, at ... on several important health care topics including advance care planning, healthcare costs and ...
(Date:6/25/2016)... ... , ... The temporary closing of Bruton Memorial Library on June 21 due to a possible ... often overlooked aspect of head lice: the parasite’s ability to live away from a human ... but a necessary one in the event that lice have simply gotten out of control. ...
(Date:6/25/2016)... ... ... First Choice Emergency Room , the largest network of independent freestanding ... of its new Mesquite-Samuell Farm facility. , “We are pleased to announce Dr. ... James M. Muzzarelli, Executive Medical Director of First Choice Emergency Room. , Dr. ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... 24, 2016  Collagen Matrix, Inc., ("Collagen Matrix") ... manufacturing of collagen and mineral based medical devices ... Bill Messer has joined the company ... leverage the growing portfolio of oral surgery, neurosurgery, ... Bill joins the Collagen Matrix executive team as ...
(Date:6/24/2016)... Research and Markets has ... 2015-2025: Applications, Technologies, Forecasts" report to their ... Electronics, Smart Skin, Structural Health Monitoring, Composite Smart ... electronics involves electronic and/or electrical components and circuits ... structures such as vehicle bodies or conformally placed ...
(Date:6/24/2016)... Research and Markets has announced the addition of the ... to their offering. ... World Market for Companion Diagnostics covers the world market for ... report includes the following: , World IVD ... (N. America, EU, ROW), 2015-2020 , World IVD Companion ...
Breaking Medicine Technology: