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Baicalin has protective effects against a range of cardiovascular conditions, such as myocardial ischemia-reperfusion injury, cardiac dysfunction, and apoptosis in cardiomyocytes. However, the underlying protective mechanisms in diabetic cardiomyopathy (DCM) remain unclear. The present study aimed to investigate the specific molecular mechanism activated by baicalin to ameliorate DCM. The effects of baicalin were investigated in vitro and its potential targets and pathways were identified using network pharmacology, molecular docking, echocardiography, reverse transcription PCR, ELISA, histopathology, immunofluorescence staining and western blotting. Baicalin significantly alleviated high-glucose (HG)-induced injury in H9c2 cells by inhibiting fibrotic markers, inflammatory factors and pyroptosis. Moreover, protein tyrosine phosphatase non-receptor type 22 (PTPN22) and tumor necrosis factor (TNF) were identified as crucial targets for baicalin. Molecular docking indicated that baicalin exhibited a strong binding affinity for PTPN22 and TNF. Baicalin successfully suppressed HG-induced pyroptosis, inflammation and fibrotic markers in addition to inhibiting the activation of TNF-α and PTPN22 signaling pathways. In addition, PTPN22-small interfering RNA treatment modulated pyroptosis in vitro. The present study offers insight into the key therapeutic mechanisms activated by baicalin, and its potential therapeutic targets, PTPN22 and TNF-α.
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Zhao et al. (2026) studied this question.
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