Figure 4From: Endoplasmic reticulum chaperone GRP78 is involved in autophagy activation induced by ischemic preconditioning in neural cells BAPTA inhibited autophagy activation and neuroprotection induced by IPC in primary cultured cortical neurons. (A) Cortical neurons were exposed to OGD for 30 min to induce IPC. Twenty-four hours after IPC, the neurons were subjected OGD for 4 h. The cell viability was examined with CCK8. (B), (C) The cells were harvested 0, 6, 12 and 24 h after IPC. (B) GRP78 was upregulated after IPC. (C) LC3II/LC3I was upregulated after IPC. (D), (E) The neurons were incubated with BAPTA 60 min before the onset of IPC and harvested 12 h after IPC. (D) BAPTA reduced IPC-induced upregulation of GRP78. (E) BAPTA reduced IPC-induced upregulation of LC3II/LC3I. Bar represents mean ± SD, n = 3. *P < 0.05, **P < 0.01, ***P < 0.001 compared with the control group; $$ P < 0.01 compared with the OGD group; % P < 0.05 compared with the IPC + OGD group; # P < 0.05 compared with the IPC group. B (L) = BAPTA 0.125 μM; B (M) = BAPTA 0.5 μM; B (H) = BAPTA 2 μM.Back to article page