Isotonic solutions of substrate were infused into surgically prepared sacs of upper small intestine in conscious unrestrained rats which fed normally via the gut-in-continuity. Infusion of glucose, galactose or sodium chloride all caused a local increase in villus height, while α-methyl glucoside and mannose had no effect. Glucose, galactose and α-methyl glucoside all stimulated a similar increase in counts of vincristine metaphases in microdissected crypts, although the absolute level of cell production was lower throughout the gut in glucose-infused rats. Sodium chloride infusion also caused a small stimulation of cell production locally, but a considerable increase in the uninfused gut-in-continuity. Mannose infusion had a variable effect on cell production. These results do not support ‘luminal nutrition’ as a controller of epithelial replacement in the rat small intestine, and suggest that a mechanism based on the work-load of the epithelium may be more appropriate.
Prof. R. Clarke, Faculty of Medicine, University of Newcastle, Newcastle, N.S.W. 2308 (Australia)
Received: August 9, 1976
Accepted: December 15, 1976
Published online: January 27, 2009
Number of Print Pages : 14
Digestion (International Journal of Gastroenterology)
Vol. 15, No. 5, Year 1977 (Cover Date: 1977)
Journal Editor: Beglinger C. (Basel), Göke B. (Munich)
ISSN: 0012-2823 (Print), eISSN: 1421-9867 (Online)
For additional information: http://www.karger.com/DIG
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