NCIt definition : A toxic metabolite derived from dietary proteins and tryptophan. In the intestine,
proteins and tryptophan are converted to indole by tryptophanase-expressing organisms.
In the liver, indole is hydroxylated to form indoxyl and indoxyl is sufated to produce
indican. Overproduction of indican is associated with glomerular sclerosis, interstitial
fibrosis and renal failure.;