5(S)-5-Carboxystrictosidine from the Root of Mappianthus iodoides Ameliorates H₂O₂-induced Apoptosis in H9c2 Cardiomyocytes via PI3K/AKT and ERK Pathways

Abstract

5(S)-5-carboxystrictosidine (5-CS) is a compound found in the root of Mappianthus iodoides, a traditional Chinese medicine used for the treatment of coronary artery disease. The aim of the present study was to investigate the protective effect of 5-CS against oxidative stress-induced apoptosis in H9c2 cardiomyocytes and the underlying mechanisms. 5-CS pretreatment significantly protected against H₂O₂-induced cell death, LDH leakage, and malondialdehyde (MDA) production, which are indicators for oxidative stress injury. 5-CS also enhanced the activity of SOD and CAT. In addition, 5-CS pretreatment significantly inhibited H₂O₂-induced apoptosis, as determined by flow cytometer, suppressed the activity of caspase-3 and caspase-9, and attenuated the activation of cleaved caspase-3 and caspase-9. 5-CS also increased Akt and ERK activation altered by H₂O₂ using Western blot analysis. The PI3K-specific inhibitor LY294002 abolished 5-CS-induced Akt activation. The ERK-specific inhibitor PD98059 abolished 5-CS-induced ERK activation. Both LY294002 and PD98059 attenuated the protective effect of 5-CS on H9c2 cardiomyocytes against H₂O₂-induced apoptosis and cell death. Taken together, these results demonstrate that 5-CS prevents H₂O₂-induced oxidative stress injury in H9c2 cells by enhancing the activity of the endogenous antioxidant enzymes, inhibiting apoptosis, and modulating PI3K/Akt and ERK signaling pathways.

Keywords

5(S)-5-carboxystrictosidine - Mappianthus iodoides - Icacinaceae - myocardial apoptosis - reactive oxygen species - PI3K/Akt - ERK

Publication History

Received: 14 November 2023

Accepted after revision: 10 June 2024

Accepted Manuscript online:
10 June 2024

Article published online:
19 July 2024

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