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Inflammation and attentional bias in breast cancer survivors.
Brain, Behavior, and Immunity 2017 November
Evidence suggests an association between inflammation and depression, although findings are mixed. Focusing on core processes in depression may clarify associated biological underpinnings. Negative cognitive bias is a key component of depression, but has not been examined in relation to inflammation. Thus, we tested the hypothesis that elevated inflammatory markers would be associated with negative attentional bias in a sample of 91 breast cancer survivors. Participants were drawn from a larger study and provided blood samples for assessment of peripheral markers of inflammation and completed questionnaires and neuropsychological testing. Attentional bias towards emotional stimuli was assessed with a dot-probe computer task using emotional (sad, happy, angry) and neutral faces. Circulating concentrations of C-reactive protein (CRP) were positively correlated with negative attentional bias (p=.03), such that women with higher CRP allocated greater attention towards sad faces. This association held when controlling for attention function and current depressive symptoms. While cross-sectional, results are consistent with research showing that inflammation heightens the salience of negative emotional stimuli, and identify a novel pathway through which inflammation may lead to depression.
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