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Transplant Proc ; 44(8): 2309-12, 2012 Oct.
Article in English | MEDLINE | ID: mdl-23026581

ABSTRACT

To examine whether treatment with L-arginine (ARG), a substrate of nitric oxide biosynthesis, attenuated intestinal dysfunction caused by ischemia (I) and reperfusion (R), we treated rats with ARG (100 mg/kg intravenously) or saline solution (SS) before 60 minutes of I produced by occlusion of the superior mesenteric artery and/or during 120 minutes of R. After I or I/R, we isolated 2-cm jejunal segments for mounting in an organ bath to study neurogenic contractions stimulated by electrical pulses or KCl with the use of a digital recording system. Thin jejunal slices were stained with hematoxylin and eosin for optical microscopy. Jejunal contractions were similar in the sham and I+ARG, but reduced in I+SS, I/R+SS, and I/R+ARG groups. Jejunal enteric nerves were damaged in I+SS, IR+SS, and IR+ARG, but not in the I+ARG group, suggesting that ARG attenuate intestinal dysfunctions due to I but not to R.


Subject(s)
Arginine/pharmacology , Gastrointestinal Agents/pharmacology , Jejunum/blood supply , Jejunum/drug effects , Reperfusion Injury/drug therapy , Animals , Cytoprotection , Disease Models, Animal , Electric Stimulation , Enteric Nervous System/drug effects , Enteric Nervous System/physiopathology , Gastrointestinal Motility/drug effects , Jejunum/innervation , Jejunum/pathology , Jejunum/physiopathology , Male , Potassium Chloride/pharmacology , Rats , Rats, Wistar , Reperfusion Injury/pathology , Reperfusion Injury/physiopathology
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