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Liu P, Li J, Liu M, Zhang M, Xue Y, Zhang Y, Han X, Jing X, Chu L. Hesperetin modulates the Sirt1/Nrf2 signaling pathway in counteracting myocardial ischemia through suppression of oxidative stress, inflammation, and apoptosis. Biomed Pharmacother 2021; 139:111552. [PMID: 33839495 DOI: 10.1016/j.biopha.2021.111552] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 03/26/2021] [Accepted: 03/27/2021] [Indexed: 11/17/2022] Open
Abstract
Hesperetin (HSP) is a natural flavonoid that offers useful curative effects for cardiovascular diseases, but its effect on myocardial ischemia and its precise mechanism remains unclear. The aim of this study is to explore the potential cardioprotective mechanism of HSP on myocardial ischemia caused by isoproterenol (ISO). Adult male Kunming mice were randomly divided into five groups: control, ISO, low-dose HSP (L-HSP, 25 mg/kg/d), high-dose HSP (H-HSP, 50 mg/kg/d), and verapamil (VER) group. Treatment groups of mice received HSP or VER for seven days, and the groups other than the control group were injected with ISO (100 mg/kg/d) subcutaneously for two consecutive days to establish a model of myocardial ischemia. Electrocardiogram and heart-histology changes were used to assess changes in myocardial architecture. The activities and the content of oxidative stress markers and inflammatory cytokines were determined and assayed using kits respectively. The expressions of proteins associated with apoptosis and the Sirt1/Nrf2 pathway were evaluated by Western blotting. The results demonstrate that VER, L-HSP and H-HSP significantly reduced the J-point displacement, heart rate, cardiac pathomorphological changes, and the levels of creatine kinase, lactated dehydrogenase, malonaldehyde, interleukin-6, and tumor necrosis factor-α in serum while promoting the activation of superoxide dismutase, catalase, glutathione in serum in the ISO-treated animals. Furthermore, L-HSP and H-HSP also reversed the ISO-induced apoptosis and the changes in the Sirt1/Nrf2 signaling pathway, as evident from the levels of proteins Bax, Bcl-2, caspase-3, Sirt1, Nrf2, NQO-1, and HO-1. In conclusion, HSP plays a protective role in ISO-induced myocardial ischemia by modulating oxidative stress, inflammation, and apoptosis via Sirt1/Nrf2 pathway activation.
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Affiliation(s)
- Panpan Liu
- School of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang 050200, Hebei, China
| | - Jinghan Li
- School of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang 050200, Hebei, China
| | - Miaomiao Liu
- School of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang 050200, Hebei, China
| | - Muqing Zhang
- School of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang 050200, Hebei, China
| | - Yucong Xue
- School of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang 050200, Hebei, China
| | - Yuanyuan Zhang
- School of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang 050200, Hebei, China
| | - Xue Han
- Affiliated Hospital, Hebei University of Chinese Medicine, Shijiazhuang 050200, Hebei, China.
| | - Xuan Jing
- Affiliated Hospital, Hebei University of Chinese Medicine, Shijiazhuang 050200, Hebei, China.
| | - Li Chu
- School of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang 050200, Hebei, China; Hebei Key Laboratory of Integrative Medicine on Liver-Kidney Patterns, Shijiazhuang 050200, Hebei, China.
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