The involvement of ERM and PI3K in the PPARα antiapoptotic effect. The pcPPAR-transfected NRK-52E cells were further transfected with ezrin, radixin, moesin or mock control siRNA, or pretreated with or without 1 nmol/L wortmannin for 30 min, and then treated with or without 3 mmol/L gentamicin for 24 h. (A) Representative flow cytometric data of gentamicin-induced apoptosis. Treated cells were stained with annexin V/PI and analyzed by flow cytometry. The sum of the cell percentages in quadrants 2 and 4 represents the percentage of apoptosis. C, mock control; G, gentamicin treatment; P, pcPPAR transfection; siE, ezrin siRNA; siR, radixin siRNA; siM, moesin siRNA; wort, wortmannin treatment. (B) The apoptotic percentage of gentamicin-treated cells. Results are means ± SD (n = 3). *P < 0.05 versus the pcPPAR group with gentamicin treatment (by Student t test).