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• W2344202261 abstract "Inflammatory bowel disease (IBD) is a chronic intestinal inflammatory condition. Psychological stress has been postulated to affect the clinical symptoms and recurrence of IBD. The exact molecular mechanisms are not fully understood. In the present study, we demonstrate that psychological stress promotes neutrophil infiltration into colon tissues in dextran sulfate sodium (DSS)-induced colitis model. The psychological stress resulted in abnormal expression of the proinflammatory cytokines (IL-1β, IL-6, IL-17A, and IL-22) and neutrophil chemokines (CXCL1 and CXCL2) and overactivation of the STAT3 inflammatory signaling pathway. Under chronic unpredictable stress, the adrenergic nervous system was markedly activated, as the expression of tyrosine hydroxylase, the rate-limiting enzyme in catecholamine biosynthesis, in bone marrow and colonic epithelium was enhanced, especially in the myenteric ganglia. The β-AR agonist isoproterenol mimicked the effects of psychological stress on neutrophilia, neutrophil infiltration, and colonic damage in DSS-induced colitis. The β1-AR/β2-AR inhibitor propranolol reduced the numbers of the neutrophils in the circulation, suppressed neutrophil infiltration into colonic tissues, and attenuated the colonic tissue damage promoted by chronic stress. Propranolol also abolished stress-induced upregulation of proinflammatory cytokines and neutrophil chemokines. Our data reveal a close linkage between the β1-AR/β2-AR activation and neutrophil trafficking and also suggest the critical roles of adrenergic nervous system in exacerbation of inflammation and damage of colonic tissues in experimental colitis. The current study provides a new insight into the mechanisms underlying the association of psychological stress with excessive inflammatory response and pathophysiological consequences in IBD. The findings also suggest a potential application of neuroprotective agents to prevent relapsing immune activation in the treatment of IBD." @default.
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• W2344202261 date "2016-10-01" @default.
• W2344202261 modified "2023-10-18" @default.
• W2344202261 title "Psychological stress promotes neutrophil infiltration in colon tissue through adrenergic signaling in DSS-induced colitis model" @default.
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• W2344202261 doi "https://doi.org/10.1016/j.bbi.2016.04.017" @default.
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