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• W2009030809 abstract "Background: Endothelial dysfunction is considered as the initiating process and pathological basis of cardiovascular disease. Cyclooxygenase-2 (COX-2) and prostacyclin synthase (PGIS), inducible nitric oxide synthase (iNOS) and endothelial NOS (eNOS) are key enzymes with opposing actions in inflammation and oxidative stress, which are believed to be the major driver of endothelial dysfunction. And in hypoxia (Hx), Hx-inducible factor (HIF)-1α and HIF-2α are predominantly induced to activate vascular endothelial growth factor (VEGF), resulting in abnormal proliferation. Whether and how Tongxinluo (TXL) modulates COX-2, PGIS, iNOS, eNOS, HIF-1α, HIF-2α, and VEGF in Hx-stimulated human cardiac microvascular endothelial cells (HCMECs) have not been clarified. Methods: HCMEC were treated with CoCl2 to mimic Hx and the mRNA expressions of COX-2, PGIS, iNOS, eNOS, HIF-1α, HIF-2α, and VEGF were first confirmed, and then their mRNA expression and protein content as well as the cell pathological alterations were evaluated for TXL treatment with different concentrations. In addition, the effector molecular of inflammation prostaglandin E2 (PGE2) and the oxidative marker nitrotyrosine (NT) was adopted to reflect HCMEC injury. Results: Hx could induce time-dependent increase of COX-2, iNOS, HIF-2α, and VEGF in HCMEC. Based on the Hx-induced increase, TXL could mainly decrease COX-2, iNOS, HIF-2α, and VEGF in a concentration-dependent manner, with limited effect on the increase of PGIS and eNOS. Their protein contents verified the mRNA expression changes, which was consistent with the cell morphological alterations. Furthermore, high dose TXL could inhibit the Hx-induced increase of PGE2 and NT contents, attenuating the inflammatory and oxidative injury. Conclusions: TXL could inhibit inflammation-related COX-2, oxidative stress-related iNOS, and HIF-2α/VEGF to antagonize Hx-induced HCMEC injury." @default.
• W2009030809 created "2016-06-24" @default.
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• W2009030809 date "2015-04-20" @default.
• W2009030809 modified "2023-10-13" @default.
• W2009030809 title "Tongxinluo Inhibits Cyclooxygenase-2, Inducible Nitric Oxide Synthase, Hypoxia-inducible Factor-2α/Vascular Endothelial Growth Factor to Antagonize Injury in Hypoxia-stimulated Cardiac Microvascular Endothelial Cells" @default.
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• W2009030809 doi "https://doi.org/10.4103/0366-6999.155119" @default.
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