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Fig. 6.

Effects of the regulation of intracellular ROS, microtubule and autophagy on proliferation and viability in PDGF-BB-stimulated VSMCs.

Serum-deprived VSMCs were incubated with 1 µM paclitaxel, 0.2 µM vinorelbine, 5 mM 3-MA (autophagy inhibitor), 0.2 µM rapamycin (autophagy stimulator), or 5 mM NAC (ROS scavenger) for 24 h followed by 25 ng/ml PDGF-BB treatment for 48 h. (A) Effects of NAC on cell viability. VSMCs cultured in serum-free medium were incubated with 1–5 mM NAC for the indicated periods, followed by subjecting the cells to the MTT assay. (B) Effects of NAC (5 mM) on ROS reduction under the regulation of microtubule and autophagy. The conditioned VSMCs were cultured with 5 mM NAC, and the ROS levels were measured using the H2DCFDA assay. Mean values of the vehicle group (0.1% DMSO) were set to 100%. ***p<0.001 vs. vehicle. The proliferation and viability of microtubule-regulated, autophagy-inhibited (C, D), and autophagy-stimulated (E, F), with or without PDGF-BB-treated VSMCs under the regulation of ROS were determined using the cell counting assay. Data are expressed as means±SEM (n=3). *p<0.05, **p<0.01 vs. the indicated group.

Korean J Physiol Pharmacol 2018;22:349-360
© Korean J Physiol Pharmacol