Sunday, August 8, 2010

Stress makes you sore.

Here is one for Monte.

......... it seems social rejection could trigger diseases linked to inflammation.

Psychologist George Slavich of the University of California, Los Angeles, and colleagues asked 124 volunteers to give speeches and perform mental arithmetic in front of a panel of dismissive observers. Saliva analysis showed they exhibited elevated levels of two inflammation markers. A quarter of the volunteers then played a computer game in which other players were instructed to exclude them.

here is the paper:

Neural sensitivity to social rejection is associated with inflammatory responses to social stress

Although stress-induced increases in inflammation have been implicated in several major disorders, including cardiovascular disease and depression, the neurocognitive pathways that underlie inflammatory responses to stress remain largely unknown. To examine these processes, we recruited 124 healthy young adult participants to complete a laboratory-based social stressor while markers of inflammatory activity were obtained from oral fluids. A subset of participants (n = 31) later completed an fMRI session in which their neural responses to social rejection were assessed. As predicted, exposure to the laboratory-based social stressor was associated with significant increases in two markers of inflammatory activity, namely a soluble receptor for tumor necrosis factor-α (sTNFαRII) and interleukin-6 (IL-6). In the neuroimaging subsample, greater increases in sTNFαRII (but not IL-6) were associated with greater activity in the dorsal anterior cingulate cortex and anterior insula, brain regions that have previously been associated with processing rejection-related distress and negative affect. These data thus elucidate a neurocognitive pathway that may be involved in potentiated inflammatory responses to acute social stress. As such, they have implications for understanding how social stressors may promote susceptibility to diseases with an inflammatory component.


Steven Rice Fitness said...

Presumably this is the flip side of research showing that people with stress-reducing mechanisms, such as social networks, meditation, or pets, tend to be healthier.

Stephan Guyenet said...

This is a really cool paper, thanks for posting.

I think I'm ready to openly acknowledge the role of psychological stress in health instead of just quietly suspecting it.

Dan said...

I think that stress could be one of the most important factors in health. I am starting to believe this could be THE major factor. It shows up everywhere.