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Tong-Sai-Mai decoction (TSM) is a Chinese materia medica polyherbal formulation that has been applied in treating brain ischemia for hundreds of years. Because it could repress the oxidative stress in in vivo studies, now we focus on the in vitro studies to investigate the mechanism by targeting the oxidative stress dependent signaling. The relation between the neurogenesis and the reactive oxygen species (ROS) production remains largely unexamined. PC12 cells are excitable cell types widely used as in vitro model for neuronal cells. Most marker genes that are related to neurotoxicity, apoptosis, and cell cycles are expressed at high levels in these cells. The aim of the present study is to explore the cytoprotection of TSM against hydrogen peroxide- (H 2 O 2 -) induced apoptosis and the molecular mechanisms underlying PC12 cells. Our findings revealed that TSM cotreatment with H 2 O 2  restores the expression of bcl-2, inducible nitric oxide synthase (INOS), and mitochondria membrane potential. Meanwhile, it reduces intracellular [Ca 2+ ] concentration, lactate dehydrogenase (LDH) release, and the expression of caspase-3 and bax. The results of the present study suggested that the cytoprotective effects of the TSM might be mediated, at least in part, by the bcl-2-mitochondria-ROS-INOS pathway. Due to its nontoxic characteristics, TSM could be further developed to treat the neurodegenerative diseases which are closely associated with the oxidative stress.

evidence-based complementary and alternative medicine

Protection of Tong-Sai-Mai Decoction against Apoptosis Induced by H<sub>2</sub>O<sub>2</sub>in PC12 Cells: Mechanisms via Bcl-2-Mitochondria-ROS-INOS Pathway

Protection of Tong-Sai-Mai Decoction against Apoptosis Induced by H2O2in PC12 Cells: Mechanisms via Bcl-2-Mitochondria-ROS-INOS Pathway

Protection of Tong-Sai-Mai Decoction against Apoptosis Induced by H₂O₂in PC12 Cells: Mechanisms via Bcl-2-Mitochondria-ROS-INOS Pathway