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Stress gets under our skin
Date:8/9/2010

arkers of inflammatory activity a receptor for tumor necrosis factor-α (sTNFαRII) and interleukin-6 (IL-6).

In a second session, 31 of the participants received an MRI brain scan while playing a computerized game of catch with what they believed were two other real people. The researchers focused on two areas of the brain known to respond to social stress the dorsal anterior cingulate cortex (dACC) and the anterior insula.

At first, the game was between all three "players." Halfway through the game, however, the research subject was excluded, leading to an experience of social rejection. The researchers then examined how differences in neural activity during social rejection correlated with differences in inflammatory responses to the TSST.

Their results showed that individuals who exhibited greater neural activity in the dorsal anterior cingulate cortex and anterior insula during social rejection in the brain scanner also exhibited greater increases in inflammatory activity when exposed to acute social stress in the lab.

"This is further evidence of how closely our mind and body are connected," Slavich said. "We have known for a long time that social stress can 'get under the skin' to increase risk for disease, but it's been unclear exactly how these effects occur. To our knowledge, this study is the first to identify the neurocognitive pathways that might be involved in inflammatory responses to acute social stress."

Although increases in inflammatory activity are part of our immune system's natural response to potentially harmful situations, Slavich noted, "frequent or chronic activation of the system may increase risk for a variety of disorders, including asthma, rheumatoid arthritis, cardiovascular disease, and even depression."

One critical question raised by the present findings is why neural sensitivity to social rejection would cause an increase in inflammation. There are several
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Contact: Mark Wheeler
mwheeler@mednet.ucla.edu
310-794-2265
University of California - Los Angeles
Source:Eurekalert

Page: 1 2 3

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