Cholesterol oxidation products (oxysterols) are commonly found in foods of animal origin and are also produced endogenously in the body. Oxysterols are cytotoxic to certain cell lines and in some cases have been shown to induce apoptosis. The aim of this study was to investigate the effects of 7beta-hydroxy-cholesterol (7beta-OHC) and 25-hydroxycholesterol (25-OHC) on cytotoxicity and induction of apoptosis in U937 and HepG2 cells, treated in media containing either 2.5% foetal calf serum (FCS) or 10% FCS to examine the effect of increasing the cholesterol level.
O'Callaghan, Y. C., Woods, J. A., & O'Brien, N. M. (1999). Oxysterol-induced cell death in U937 and HepG2 cells at reduced and normal serum concentrations. European Journal of Nutrition, 38(6), 255-262. https://doi.org/10.1007/s003940050075