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Cardiovascular disease (CVD) is the leading cause of death. Oxidative stress is an important pathological process of a variety of CVDs. Xinshuaining preparation has a therapeutic effect on the heart failure. However, the anti-oxidative stress role of Xinshuaining preparation in H9c2 cells is still unclear. The medicated serum of Xinshuaining preparation was acquired and utilized to hatch with H 2 O 2 -induced H9c2 cells. Main components in the Xinshuaining preparation were analyzed by liquid chromatography-mass spectrometry (LC/MS). The effect of medicated serum on the cell viability, apoptosis rate, the oxidative stress indicators (SOD, GSH-Px, and MDA), mitochondrial membrane potential (MMP), and ROS level was evaluated by CCK-8, flow cytometry, commercial biochemical detection kits, and JC-1 staining. Additionally, the associated mechanism was determined by the detection of the protein levels (PI3K, phosphorylated PI3K, Akt, phosphorylated Akt, and Nrf-2) through western blot assays, which was also further assessed with the application of LY294002. The medicated serum of Xinshuaining preparation notably increased the H 2 O 2 -reduced, the cell viability, the concentration of SOD and GSH-Px, MMP level and the relative protein expression level of phosphorylated PI3K and Akt and Nrf-2, while dampened the H 2 O 2 -elevated the level of the cell apoptosis rate, MDA, and ROS. However, Xinshuaining preparation on the cell viability, apoptosis, and oxidative stress was notably antagonized by LY294002 pre-treatment. The medicated serum of Xinshuaining preparation increased the cell viability and suppressed apoptosis and oxidative stress via the PI3K/Akt/Nrf-2 signaling pathway.

Xinshuaining preparation protects H9c2 cells from H 2 O 2 -induced oxidative damage through the PI3K/Akt/Nrf-2 signaling pathway