Polyunsaturated fatty acid – N-3 and n-6 polyunsaturated fatty acids were found to have a distinct effect on cell growth in certain human urothelial cells. Cystostatic concentrations of n-3 and n-6 PUFA did not induce apoptosis, but did cause permanent cellular growth arrest by effecting the cell cycle. Study shows that metabolites of the lipoxygenase pathway are involved with the antiproliferation induce by PUFA.