Cholesterol interferes with the MTT assay in human epithelial-like (A549) and endothelial (HLMVE and HCAE) cells.
Ahmad S, Ahmad A, Schneider KB, White CW. Cholesterol interferes with the MTT assay in human epithelial-like (A549) and endothelial (HLMVE and HCAE) cells. Int J Toxicol. 2006 Jan-Feb; 25(1):17-23.