Open Access


Read more
image01

Online Manuscript Submission


Read more
image01

Submitted Manuscript Trail


Read more
image01

Online Payment


Read more
image01

Online Subscription


Read more
image01

Email Alert



Read more
image01

Original Research Article | OPEN ACCESS

Tectorigenin ameliorates myocardial cell injury caused by hypoxia/reoxygenation by inhibiting autophagy via activation of PI3K/AKT/mTOR pathway

Jijun Wu1, Yingli Zhou2 , Ming Guo1, Jie Yang1, Feifei Wu1, Jialin Wang1

1Department of Cardiology, Affiliated Xiaoshan Hospital, Hangzhou Normal University, Hangzhou, Zhejiang Province 310000, China; 2Department of Dermatology, Hangzhou Third People's Hospital, Hangzhou, Zhejiang Province 310000, China.

For correspondence:-  Yingli Zhou   Email: ylzhou5701@163.com   Tel:+8657187814481

Accepted: 16 July 2022        Published: 28 August 2022

Citation: Wu J, Zhou Y, Guo M, Yang J, Wu F, Wang J. Tectorigenin ameliorates myocardial cell injury caused by hypoxia/reoxygenation by inhibiting autophagy via activation of PI3K/AKT/mTOR pathway. Trop J Pharm Res 2022; 21(8):1601-1606 doi: 10.4314/tjpr.v21i8.4

© 2022 The authors.
This is an Open Access article that uses a funding model which does not charge readers or their institutions for access and distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0) and the Budapest Open Access Initiative (http://www.budapestopenaccessinitiative.org/read), which permit unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited..

Abstract

Purpose: To investigate the protective role of tectorigenin in myocardial ischaemia/reperfusion.
Methods: Myocardial cells (H9c2) were treated with different concentrations of tectorigenin and exposed to hypoxia/reoxygenation. Cell viability and apoptosis were determined by MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide) and TUNEL (terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling) staining, respectively. Oxidative stress and inflammation were evaluated using enzyme-linked immunosorbent assay (ELISA), while autophagy and the underlying mechanisms of action were evaluated by Western blot.
Results: Tectorigenin enhanced the proliferative activity of H9c2 under hypoxia/reoxygenation conditions, and significantly reduced the apoptotic activity (p < 0.001) through decrease in Bax and increase in Bcl-2. Tectorigenin also significantly up-regulated SOD (superoxide dismutase) and GSH (glutathione) levels (p < 0.01), and down-regulated MDA (malondialdehyde) and MPO (myeloperoxidase) in hypoxia/reoxygenation-induced H9c2. TNF-α (tumor necrosis factor-α), IL(interleukin)-1β, and IL-6 levels were also inhibited by tectorigenin by down-regulating p-p65. Hypoxia/reoxygenation-induced increase in p62 and decrease in Beclin-1 and LC3-II/LC3-I were reversed by tectorigenin. Protein expressions of p-mTOR, p-AKT, and p-PI3K in hypoxia/reoxygenation-induced H9c2 were elevated by tectorigenin.
Conclusion: Tectorigenin exerts anti-oxidant, anti-inflammatory, and anti-autophagic effects on hypoxia/reoxygenation-induced H9c2 through the activation of PI3K/AKT/mTOR pathway, thus suggesting that it is a potential agent for the management of myocardial ischaemia/reperfusion.

Keywords: Tectorigenin, Oxidative stress, Inflammation, Autophagy, Hypoxia/reoxygenation, Myocardial cells, PI3K/AKT/mTOR

Impact Factor
Thompson Reuters (ISI): 0.6 (2023)
H-5 index (Google Scholar): 49 (2023)

Article Tools

Share this article with



Article status: Free
Fulltext in PDF
Similar articles in Google
Similar article in this Journal:

Archives

2024; 23: 
1,   2,   3,   4,   5,   6,   7,   8,   9,   10. 
2023; 22: 
1,   2,   3,   4,   5,   6,   7,   8,   9,   10,   11,   12. 
2022; 21: 
1,   2,   3,   4,   5,   6,   7,   8,   9,   10,   11,   12. 
2021; 20: 
1,   2,   3,   4,   5,   6,   7,   8,   9,   10,   11,   12. 
2020; 19: 
1,   2,   3,   4,   5,   6,   7,   8,   9,   10,   11,   12. 
2019; 18: 
1,   2,   3,   4,   5,   6,   7,   8,   9,   10,   11,   12. 
2018; 17: 
1,   2,   3,   4,   5,   6,   7,   8,   9,   10,   11,   12. 
2017; 16: 
1,   2,   3,   4,   5,   6,   7,   8,   9,   10,   11,   12. 
2016; 15: 
1,   2,   3,   4,   5,   6,   7,   8,   9,   10,   11,   12. 
2015; 14: 
1,   2,   3,   4,   5,   6,   7,   8,   9,   10,   11,   12. 
2014; 13: 
1,   2,   3,   4,   5,   6,   7,   8,   9,   10,   11,   12. 
2013; 12: 
1,   2,   3,   4,   5,   6. 
2012; 11: 
1,   2,   3,   4,   5,   6. 
2011; 10: 
1,   2,   3,   4,   5,   6. 
2010; 9: 
1,   2,   3,   4,   5,   6. 
2009; 8: 
1,   2,   3,   4,   5,   6. 
2008; 7: 
1,   2,   3,   4. 
2007; 6: 
1,   2,   3,   4. 
2006; 5: 
1,   2. 
2005; 4: 
1,   2. 
2004; 3: 
1. 
2003; 2: 
1,   2. 
2002; 1: 
1,   2. 

News Updates