Effects of natural stilbene compounds and RSV metabolites in control and patient fibroblasts. Cells were treated with 75 μM of each compound for 48 h. A) changes in CPT2 protein levels in control and CPT2-deficient fibroblasts. B) changes in VLCAD protein levels in control and VLCAD-deficient fibroblasts. Histograms are means ± SEM of three different experiments. Control values are from three different individuals. *P < 0.05, **P < 0.01, ***P < 0.001 when compared with vehicle-treated cells.