ABDOMINAL-SURGERY INDUCES FOS IMMUNOREACTIVITY IN THE RAT-BRAIN

被引:59
作者
BONAZ, B
PLOURDE, V
TACHE, Y
机构
[1] UNIV CALIF LOS ANGELES,VET ADM WADSWORTH MED CTR,CTR DIGEST DIS,GUT NEUROBIOL LAB,LOS ANGELES,CA 90073
[2] UNIV CALIF LOS ANGELES,DEPT MED,LOS ANGELES,CA 90073
[3] UNIV CALIF LOS ANGELES,INST BRAIN RES,LOS ANGELES,CA 90073
关键词
ARGININE VASOPRESSIN; OXYTOCIN; TYROSINE HYDROXYLASE; PARAVENTRICULAR NUCLEUS OF THE HYPOTHALAMUS; STRESS;
D O I
10.1002/cne.903490205
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Previous neuropharmacological studies indicate that brain peptides are involved in mediating gastric stasis induced by abdominal surgery. Central pathways activated by abdominal surgery were investigated in the rat by using Fos protein as a marker of neuronal activation. Abdominal surgery (laparotomy alone or combined with cecal manipulation) was performed under brief enflurane anesthesia (7-8 minutes), and 1 hour later rats were killed and brains processed for Fos immunoreactivity. Double labeling with Fos and arginine vasopressin, oxytocin, or tyrosine hydroxylase antibodies was also performed. Abdominal surgery induced Fos staining in the nucleus tractus solitarii, paraventricular and supraoptic nuclei of the hypothalamus, locus coeruleus, and ventrolateral medulla. After abdominal surgery, 18-25% of vasopressin and 18-33% of oxytocin-labeled cells were found to be Fos positive in the paraventricular nucleus and 15% of activated cells in the nucleus tractus solitarii were positive for tyrosine hydroxylase immunoreactivity. Enflurane alone induced c-fos expression in the same brain area; however, the number of Fos-positive cells and double-labeled cells were decreased two- to fivefold and three- to eightfold, respectively, compared with the abdominal surgery groups. These data show that abdominal surgery induced activation of specific hypothalamic, pontine, and medullary neurons. These findings may have implications for the understanding of central mechanisms involved in mediating gastric ileus following abdominal surgery. (C) 1994 Wiley-Liss, Inc.
引用
收藏
页码:212 / 222
页数:11
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