Central action of recombinant interleukin-1 to inhibit acid secretion in rats

Gastroenterology
E S SaperasY Taché

Abstract

The influence of recombinant human interleukins-1 beta and -1 alpha and rat interleukin-1 beta on gastric acid secretion was investigated in awake rats with pylorus ligation. IC injection of either human interleukin-1 beta, human interleukin-1 alpha, or rat interleukin-1 beta induced a dose-dependent inhibition of gastric acid output. At IC doses less than 100 ng, human interleukin-1 beta was more effective than the other forms or sources of interleukin-1, whereas at higher doses (100-500 ng), human interleukins-1 beta and -1 alpha and rat interleukin-1 beta were equipotent. The inhibitory effect was observed 30 minutes after interleukin-1 injection and maintained throughout the 6-hour experimental period. IC injection of interleukin-1 beta inhibited vagally stimulated gastric acid secretion induced by IC injection of the stable thyrotropin-releasing hormone analogue RX 77368. Indomethacin (1, 5, and 10 mg/kg, IP, -30 minutes) induced a dose-related prevention of the inhibitory effect of IC interleukin-1 beta. IC injection of the corticotropin-releasing factor antagonist alpha-CRF9-41, bilateral adrenalectomy, and noradrenergic blockade with bretylium did not influence the antisecretory effect of interleukin-1. Polypeptide acti...Continue Reading

Citations

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