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• W2996874653 abstract "The combination of tetramethylpyrazine phosphate (TMPP) and borneol (BO) protects against cerebral ischemia. However, the mechanism for their synergistic effect is unclear. In this study, an oxygen-glucose deprivation (OGD) injured brain model was induced in microvascular endothelium cells (BMECs). TMPP and BO concentrations were optimized according to an MTT assay. Cells were divided into five groups: control, model, TMPP, BO, and TMPP+BO. Subsequently, oxidative stress was evaluated based on the levels of superoxide dismutase (SOD), malondialdehyde (MDA), catalase (CAT), glutathione peroxidase (GSH-Px), and reactive oxygen species (ROS). Intracellular calcium ([Ca2+]i) was detected using a laser confocal microscope. Cellular apoptosis was examined via Hoechst 33342 staining, flow cytometry, and expression of p53, B-cell lymphoma 2 (BCL-2), BCL-2-like protein 4 (BAX), and caspase-3 mRNA. Angiogenesis was evaluated based on expression of basic fibroblast growth factor (bFGF), vascular endothelial growth factor (VEGF), fibroblast growth factor receptor 1 (FGFR1), Vascular endothelial growth factor receptor 1 (VEGFR1), and VEGFR2. Results showed that 5.0 μM TMPP and 0.5 μM BO were optimal. Monotherapy significantly enhanced CAT, BCL-2, and VEGF, and also reduced [Ca2+]i, apoptosis, and BAX. TMPP increased SOD, GSH-Px, and bFGF, and reduced MDA, ROS, p53, and caspase-3 levels. BO reduced VEGFR1 expression. TMPP+BO combination exhibited synergistic effects in decreasing apoptosis, and modulating expression of BCL-2, BAX, and VEGFR1. These results indicate that protection of OGD-injured BMECs by TMPP+BO combination involves anti-oxidation, apoptosis inhibition, and angiogenesis. Moreover, their synergistic mechanism was mainly related to the regulation of apoptosis and angiogenesis." @default.
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• W2996874653 date "2019-01-01" @default.
• W2996874653 modified "2023-09-25" @default.
• W2996874653 title "Synergistic protection of tetramethylpyrazine phosphate and borneol on brain microvascular endothelium cells injured by hypoxia." @default.
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• W2996874653 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6511760" @default.
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