A. HaCaT cells were treated with denoted ligands (2 μM, 2 hr) prior to addition of TNFα (20 ng/ml, 14 hr.). Cells were lysed and the level of cleaved PARP assessed by immunoblots. A representative experiment is shown. B. Quantitation of data described in panel a. Band intensities were normalized to the loading control GAPDH. Data are mean ± SEM, n=3. C. and D. Parental HaCaT (C.) or NaF (D.) cells and corresponding cells over-expressing CRABP-II or under-expressing FABP5 were treated with denoted ligands (1 μM, 16 hr.), or pretreated with ligands for 2 hr. prior to addition of TNFα (20 ng/ml, 14 hr., solid bars). Apoptosis was evaluated using the APOPercentage Apoptosis Assay kit. Data are mean ± SEM, n=3.