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Digestive Diseases and Sciences

, Volume 26, Issue 2, pp 100–106 | Cite as

Effect of short-chain fatty acid on sodium absorption in isolated human colon perfused through the vascular bed

  • W. E. W. Roediger
  • A. Moore
Original Articles

Abstract

A method of perfusing the isolated human colonin vitro was developed to study the effect of the short-chain fatty acidn-butyrate on sodium absorption under controlled conditions. The isolated colon was viablein vitro provided that ischemia to the colon prior to perfusion was less than 40 min. Viability was judged on glucose utilization, mucosal potential difference, and sodium absorption. Sodium absorption from the lumen was observed either with or without 20 mMn-butyrate. In a control group sodium absorption (nmol/min/cm2±sem) was 320±10 (four perfusions, nine observation intervals) and potassium secretion 26±3 (four perfusions, nine observation intervals). With 20 mMn-butyrate sodium absorption was 1960±480 (four perfusions, ten observation intervals) (P<0.0025). Potassium secretion was 72±2 (four perfusions, ten observation intervals) (P<0.025). Butyrate absorption was 254±60 (four perfusions, ten observation intervals) and correlated linearly with the unidirectional flux (J m→s ) of sodium (linear coefficient of 0.714,P=<0.001). These results suggest that the presence of bacterial short-chain fatty acids may determine the efficiency of sodium absorption in the colon and also indicate that an absence of short-chain fatty acids in the colon could be one factor leading to diminished sodium absorption in the colon of man.

Keywords

Public Health Glucose Sodium Potassium Ischemia 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Digestive Disease Systems, Inc 1981

Authors and Affiliations

  • W. E. W. Roediger
    • 1
  • A. Moore
    • 1
  1. 1.Nuffield Department of Clinical Surgery and Clinical BiochemistryOxford

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