{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,29]],"date-time":"2026-01-29T20:52:37Z","timestamp":1769719957453,"version":"3.49.0"},"reference-count":44,"publisher":"American Physiological Society","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["American Journal of Physiology-Gastrointestinal and Liver Physiology"],"published-print":{"date-parts":[[2006,4]]},"abstract":"<jats:p> Using a rodent model of gut ischemia-reperfusion (I\/R), we have previously shown that the induction of inducible nitric oxide synthase (iNOS) is harmful, whereas the induction of heme oxygenase 1 (HO-1) and peroxisome proliferator-activated receptor-\u03b3 (PPAR-\u03b3) is protective. In the present study, we hypothesized that the luminal nutrients arginine and glutamine differentially modulate these molecular events in the postischemic gut. Jejunal sacs were created in rats at laparotomy, filled with either 60 mM glutamine, arginine, or magnesium sulfate (osmotic control) followed by 60 min of superior mesenteric artery occlusion and 6 h of reperfusion, and compared with shams. The jejunum was harvested for histology or myeloperoxidase (MPO) activity (inflammation). Heat shock proteins and iNOS were quantitated by Western blot analysis and PPAR-\u03b3 by DNA binding activity. In some experiments, rats were pretreated with the PPAR-\u03b3 inhibitor G9662 or with the iNOS inhibitor N-[3(aminomethyl)benzyl]acetamidine (1400W). iNOS was significantly increased by arginine but not by glutamine following gut I\/R and was associated with increased MPO activity and mucosal injury. On the other hand, PPAR-\u03b3 was significantly increased by glutamine but decreased by arginine, whereas heat shock proteins were similarly increased in all experimental groups. The PPAR-\u03b3 inhibitor G9662 abrogated the protective effects of glutamine, whereas the iNOS inhibitor 1400W attenuated the injurious effects of arginine. We concluded that luminal arginine and glutamine differentially modulate the molecular events that regulate injurious I\/R-mediated gut inflammation and injury. The induction of PPAR-\u03b3 by luminal glutamine is a novel protective mechanism, whereas luminal arginine appears harmful to the postischemic gut due to enhanced expression of iNOS. <\/jats:p>","DOI":"10.1152\/ajpgi.00248.2005","type":"journal-article","created":{"date-parts":[[2005,10,27]],"date-time":"2005-10-27T20:39:22Z","timestamp":1130445562000},"page":"G616-G623","source":"Crossref","is-referenced-by-count":60,"title":["Differential induction of PPAR-\u03b3 by luminal glutamine and iNOS by luminal arginine in the rodent postischemic small bowel"],"prefix":"10.1152","volume":"290","author":[{"given":"N.","family":"Sato","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"F. A.","family":"Moore","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"B. 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