Effects of intestinal ischemia/reperfusion injury on gastric acid secretion

Antonio Castañeda, Ronald Vilela, Lily Chang, David W. Mercer

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Background. The mechanism responsible for gastric colonization in critically injured ICU patients remains to be fully elucidated. Moreover, the effects of gut ischemia/reperfusion (I/R) injury on gastric function are unclear. It was our hypothesis that gut I/R injury would cause gastric dysfunction. Materials and methods. Rats were anesthetized and, via laparotomy, the superior mesenteric artery (SMA) was clamped at its aortic origin for 45 rain followed by clamp removal. Rats were allowed to awaken and then killed after 6 h of reperfusion. Control rats underwent laparotomy with SMA isolation. Stomachs were removed, gastric fluid was aspirated, and the volume, pH, and protein, bicarbonate, and glucose contents were determined. Serum and antral mucosa were prepared for gastrin radioimmunoassay and the glandular mucosa was assessed for morphologic injury. Results. SMA I/R injury caused significant accumulation of gastric luminal fluid that was alkaline and rich in protein, glucose, and bicarbonate content when compared with sham controls. SMA I/R injury also caused gastric surface epithelial cell injury and significantly increased serum and antral gastrin levels. In additional rats, gut I/R injury inhibited basal acid secretion and blunted the acid secretory response to pentagastrin. Conclusions. This study demonstrated for the first time that small intestinal I/R injury causes significant gastric dysfunction. The findings suggest that this type of injury, a frequent occurrence in critically injured ICU patients, may predispose patients to gastric colonization due to stasis and loss of the natural bactericidal effects of gastric acid. (C) 2000 Academic Press.

Original languageEnglish (US)
Pages (from-to)88-93
Number of pages6
JournalJournal of Surgical Research
Volume90
Issue number1
DOIs
StatePublished - May 1 2000

Fingerprint

Gastric Acid
Reperfusion Injury
Stomach
Superior Mesenteric Artery
Gastrins
Bicarbonates
Laparotomy
Wounds and Injuries
Mucous Membrane
Glucose
Pentagastrin
Acids
Rain
Serum
Reperfusion
Radioimmunoassay
Proteins
Epithelial Cells

Keywords

  • Acid secretion
  • Gastrin
  • Ischemia/reperfusion injury
  • Stomach

ASJC Scopus subject areas

  • Surgery

Cite this

Effects of intestinal ischemia/reperfusion injury on gastric acid secretion. / Castañeda, Antonio; Vilela, Ronald; Chang, Lily; Mercer, David W.

In: Journal of Surgical Research, Vol. 90, No. 1, 01.05.2000, p. 88-93.

Research output: Contribution to journalArticle

Castañeda, Antonio ; Vilela, Ronald ; Chang, Lily ; Mercer, David W. / Effects of intestinal ischemia/reperfusion injury on gastric acid secretion. In: Journal of Surgical Research. 2000 ; Vol. 90, No. 1. pp. 88-93.
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