Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0848237 (acute stress)
 4,619 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Chromodacryorrhea was produced in 5, 7, and 16 week old intact and adrenalectomized rats following intravenous injection of acetylcholine or acute stress induced by limb restraint. Atropine blocked the lacrimal response to both stimuli, and epinephrine and corticosterone had no dacryogenic effects. The latent period between the onset of limb restraint and red tear release averaged 16 minutes.
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PMID:Chromodacryorrhea in laboratory rats (Rattus norvegicus): etiologic considerations. 743 65

We have previously reported that acute stress alters intestinal transport physiology in Wistar-Kyoto rats, a stress-susceptible strain. In this study, we tested the hypothesis that the abnormalities in these rats are due to cholinergic mechanisms. Atropine- or saline-treated rats were exposed to acute restraint stress, and, subsequently, electrophysiological parameters of excised jejunal segments were assessed in Ussing chambers. Compared with the parent Wistar rat strain, Wistar-Kyoto rats demonstrated significantly greater stress-induced changes in ion secretion and permeability. The activity of cholinesterase in intestinal mucosal homogenates was significantly less in Wistar-Kyoto than in Wistar rats. Atropine pretreatment of rats before stress corrected the epithelial pathophysiology. Our results suggest that stress stimulated the release of acetylcholine, resulting in altered epithelial function in these genetically predisposed rats.
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PMID:Cholinergic nerves mediate stress-induced intestinal transport abnormalities in Wistar-Kyoto rats. 927 29

Evidence suggests that stress may be a contributing factor in intestinal inflammatory disease; however, the involved mechanisms have not been elucidated. We previously reported that acute stress alters epithelial physiology of rat intestine. In this study, we documented stress-induced macromolecular transport across intestinal epithelium. After exposure of Wistar-Kyoto rats to acute restraint stress, transport of a model protein, horseradish peroxidase (HRP), was assessed in isolated segments of jejunum. The flux of intact HRP was significantly enhanced across intestine from stressed rats compared with controls. Electron microscopy revealed HRP-containing endosomes within enterocytes, goblet cells, and Paneth cells of stressed rats. The number and area of HRP endosomes within enterocytes were found to be significantly increased by stress. HRP was also visualized in paracellular spaces between adjacent epithelial cells only in intestine from stressed rats. Atropine treatment of rats prevented the stress-induced abnormalities of protein transport. Our results suggest that stress, via a mechanism that involves release of acetylcholine, causes epithelial dysfunction that includes enhanced uptake of macromolecular protein antigens. We speculate that immune reactions to such foreign proteins may initiate or exacerbate inflammation.
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PMID:Stress stimulates transepithelial macromolecular uptake in rat jejunum. 981 34