Effect of Chromate on Glucose Transport by the Gut of Rainbow Trout

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Abstract
Rainbow trout (Salmo gairdneri) were exposed to 2.5 mg Cr (available as chromate)/l for 7 days. The in vitro glucose transport of gut segments from these animals was compared to that by similar segments from untreated controls. The glucose transport of mid-gut segments from control fish was 18.4 [plus or minus] 2.7 (SE) ug/mg dry wt/hr compared to 7.1 [plus or minus] 1.5 (SE) for pyloric cecal segments. The transport by caecal and mid-gut segments from chromium exposed fish were 40 and 32% lower respectively than those of controls (p=0.10). It is suggested that this decrease is primarily the result of an inhibition of the entry of glucose into the epithelial cells caused by the presence of chromium in these tissues.

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