EFFECTS OF INTRALUMINAL GLUCOSE ON INTESTINAL SECRETION INDUCED BY HEAT-STABLE AND HEAT LABILE ESCHERICHIA-COLI ENTEROTOXIN, CHOLERA TOXIN AND THEOPHYLLINE

  • 1 January 1978
    • journal article
    • research article
    • Vol. 42  (1) , 89-96
Abstract
Glucose, L-alanine, L-asparate, L-methionine and glycine enhanced net fluid and electrolyte absorption in acute isolated loops of the proximal jejunum of weanling swine. The effect of glucose on intestinal secretion induced by heat stable and heat labile E. coli enterotoxin, cholera toxin and theophylline was examined in the proximal and distal jejunum of weanling swine. In the proximal jejunum glucose enhanced the rate of net fluid and electrolyte absorption. This increase was accompanied by an increase in unidirectional Na absorption. In loops exposed to heat stable or heat labile enterotoxins, glucose significantly decreased the rate of net fluid and electrolyte secretion. The magnitude of glucose enhancement in loops exposed to heat stable and heat labile enterotoxins was similar to adjacent control loops. Glucose enhancement did not occur in loops exposed previously to cholera toxin or concurrently to theophylline. Cholera toxin and theophylline may inhibit substrate dependent sodium absorption in the proximal jejunum. In the distal jejunum glucose enhancement did occur but the rate of enhancement was less than in the proximal jejunum. In this region glucose enhancement was not evident in loops exposed to either theophylline, heat stable, heat labile or cholera toxin.