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>Scutellarin protects human cardiac microvascular endothelial cells with hypoxia-reoxygenation injury via JAK2/STAT3 signal pathway
Scutellarin protects human cardiac microvascular endothelial cells with hypoxia-reoxygenation injury via JAK2/STAT3 signal pathway
Objective: To investigate the antagonistic cell injury effect and molecular mechanism of scutellarin(SCU)in hypoxia reoxygenation(HR) treated human cardiac microvascular endothelial cells(HCMECs).Methods: The method of 12 h hypoxia following by 12 h reoxygenation was used to culture HCMECs in vitro to built cell injury model. The groups were divided into control group, model(HR) group, and HR + SCU(0.1 μmol/L, 1 μmol/L, and 10 μmol/L) group. The cell viability was determined by MTT, and oxidative stress was detected by malondialdehyde(MDA) levels by biochemical assay kit. Protein expression of JAK2/p-JAK2 and STAT3/p-STAT3 were evaluated by Western blot.Results: The results of MTT and MDA showed that HR decreased the cell viability(P < 0.05) and increased MDA level significantly(P < 0.05), SCU played a contrary role in these processes. Western blot analysis indicates that, the expression of JAK2 and p-JAK2, STAT3, and p-STAT3 were increased in model group when compared with control group(P < 0.05); Compared with model group, their expression were reduced by SCU(P < 0.05).Conclusion: SCU took a protective effect on HR-treated HCMECs, and the molecular mechanism may be associated with the inhibition of JAK2/STAT3 signal transduction pathway.
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