H. Schneider et al., INHIBITORY POTENCY OF LITHOCHOLIC ACID ANALOGS AND OTHER BILE-ACIDS ON GLUCURONOSYLTRANSFERASE ACTIVITY IN A COLON-CANCER CELL-LINE, Bioorganic & medicinal chemistry letters, 6(6), 1996, pp. 637-642
The effectiveness of analogs of lithocholic acid and other bile acids
in inhibiting glucuronosyltransferase activity in a colon cancer cell
line was measured in order to identify structural features critical fo
r inhibition of the enzyme. Analogs of lithocholic acid with modificat
ions of the side chain (2-7) were synthesized, in part, to study their
inhibitory effects on glucuronosyltransferase activity. Bishomolithoc
holic acid (4) was synthesized from the iodo derivative (9) by a free
radical Michael type reaction using tris(trimethylsilyl)silane as a fr
ee radical mediator.