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- W2000947467 abstract "Acute psychological stress is associated with important changes in circulating cell populations and reductions in cell-mediated immune responses. However, the mechanisms underlying these phenomena are poorly understood. In this study, we investigated (i) acute and chronic restraint stress effects in Sprague-Dawley rats on peripheral lymphocyte subsets and (ii) adhesion molecule (beta2 integrins) expression and (iii) also determined whether glucocorticoids could underlie stress-related changes in cellular redistribution. We observed time-dependent changes in lymphocyte distribution including decreased (-21%) percentages of peripheral T helper cells and increased (88%) NK cell numbers following acute brief restraint. Acute stress was also found to overall upregulate beta2-integrin (CD11a and CD11b) expression on T cells and to raise (1049%) plasma corticosterone levels. However, this stress response was found habituated (-75% vs. acute) in the animals previously exposed to chronic restraint stress. Stress effects on circulating lymphocytes were not observed in animals previously exposed to chronic intermittent restraint stress or chronically stressed animals re-exposed to the same stressor. Our results indicate that 1) stress alters lymphocyte distribution, 2) that adhesion molecules may be involved in stress-induced alterations of T-cell distribution and 3) that these changes may be related to circulating glucocorticoids and subjected to adaptation with repeated stress exposure." @default.
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- W2000947467 date "2001-07-01" @default.
- W2000947467 modified "2023-09-23" @default.
- W2000947467 title "Are adhesion molecules involved in stress-induced changes in lymphocyte distribution?" @default.
- W2000947467 doi "https://doi.org/10.1016/s0024-3205(01)01200-0" @default.
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