Protective effects of astragaloside IV against hypertension-induced vascular remodeling involves the DNMT1 and TET2 signaling pathway

Authors

  • Yingchun Qin 1. Shanghai University of Traditional Chinese Medicine, Shanghai 201203, P. R. China; 2. Fengxiian Hospital affiliated to Shanghai University of Medicine & Health Sciences, 201499, P. R. China https://orcid.org/0000-0002-7515-7219
  • Yilin Xie Shanghai Jiao Tong University – Minhang Campus, School of Life Science and Biotechnology, Shanghai Key Laboratory for Reproductive Medicine, Shanghai 200240, P. R. China
  • Aihua Li Shanghai Fengxian District Central Hospital, Shanghai 201499, P. R. China
  • Xiaoqin Zhang Shanghai Fengxian District Central Hospital, Shanghai 201499, P.R. China
  • Zhiqiang Yan 1. Shanghai University of Traditional Chinese Medicine, Shanghai 201203, P. R. China; 2. Fengxiian Hospital affiliated to Shanghai University of Medicine & Health Sciences, 201499, P. R. China http://orcid.org/0000-0002-0184-2133

DOI:

https://doi.org/10.2298/ABS210426024Q

Keywords:

hypertension, vascular remodeling, vascular smooth muscle cells (VSMC), astragaloside IV, DNA methyltransferase1 (DNMT1), ten-eleven translocation 2 (TET2)

Abstract

Paper description:

  • Astragaloside IV (AS-IV), a triterpene saponin from Astragalus membranaceus, has a beneficial effect in cardiovascular disease.
  • In two-kidney one-clip (2K1C) hypertensive rats, AS-IV: reduced blood pressure; reversed hypertension-induced thoracic media thickness; inhibited DNMT1, MMP2, PCNA; increased SM22α, ACTA2, TET2 expression in the aorta; in vitro it inhibited the proliferation and migration in VSMCs treated with angiotensin II; induced SM22α, ACTA2, TET2; reduced COL-1a, COL-3a, DNMT1, MMP2, PCNA expression; modulated 5-methylcytosine expression.
  • AS-IV reversed hypertension-induced vascular remodeling by inhibiting DNMT1, upregulating TET2.
  • Novel insight for As-IV treatment of vascular disease is provided.

Abstract: Proliferation, migration, and the phenotypic switch of vascular smooth muscle cells (VSMCs) play an important role in vascular remodeling induced by hypertension. Astragaloside IV (AS-IV), the active ingredient of Astragalus membranaceus, has been shown to exert a beneficial role in cardiovascular disease. The present study aimed to investigate the mechanism responsible for the protective effects of AS-IV on hypertension-induced vascular remodeling. AS-IV significantly reduced blood pressure and aortic media thickness in two-kidney, one-clip (2K1C) hypertensive rats. AS-IV administration downregulated the expression levels of DNA methyltransferase1 (DNMT1), matrix metalloproteinase (MMP2) and proliferating cell nuclear antigen (PCNA) and upregulated the expression of smooth muscle 22α protein (SM22α), α-smooth muscle actin (ACTA2) and ten-eleven translocation 2 (TET2) in the aorta of hypertensive rats. AS-IV inhibited the proliferation and migration in VSMCs treated with angiotensin II (Ang II). AS-IV increased the expression of SM22α, ACTA2 and TET2, and decreased the expression of collagen Ia (COL-1a), collagen IIIa (COL-3a), DNMT1, MMP2 and PCNA in vitro. Reduction in 5-methylcytosine (5-mC) was observed in VSMCs treated with AS-IV. Knockdown of DNMT1 induced the expression of TET2, while the level of DNMT1 did not change after knockdown of TET2. These results suggest that AS-IV reversed hypertension-induced vascular remodeling by inhibiting DNMT1 and upregulating TET2.

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Published

2021-07-13

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1.
Qin Y, Xie Y, Li A, Zhang X, Yan Z. Protective effects of astragaloside IV against hypertension-induced vascular remodeling involves the DNMT1 and TET2 signaling pathway. Arch Biol Sci [Internet]. 2021Jul.13 [cited 2024Dec.22];73(2):303-1. Available from: https://serbiosoc.org.rs/arch/index.php/abs/article/view/6547

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Vol. 73 No. 2 (2021)

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