Homocysteine-induced proliferation of vascular smooth muscle cells occurs via PTEN hypermethylation and is mitigated by Resveratrol

Ma,Sheng‑Chao; Zhang,Hui‑Ping; Jiao,Yun; Wang,Yan‑Hua; Zhang,Hui; Yang,Xiao‑Ling; Yang,An‑Ning; Jiang,Yi‑Deng

doi:10.3892/mmr.2018.8471

Homocysteine-induced proliferation of vascular smooth muscle cells occurs via PTEN hypermethylation and is mitigated by Resveratrol

Authors:
- Sheng‑Chao Ma
- Hui‑Ping Zhang
- Yun Jiao
- Yan‑Hua Wang
- Hui Zhang
- Xiao‑Ling Yang
- An‑Ning Yang
- Yi‑Deng Jiang
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Affiliations: Department of Basic Medicine, Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China, Department of Prenatal Diagnosis Center, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China, Department of Infectious Disease, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China
Published online on: January 24, 2018 https://doi.org/10.3892/mmr.2018.8471
Pages: 5312-5319

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Abstract

Vascular smooth muscle cell (VSMC) proliferation is a primary pathological event in the development of atherosclerosis (AS), and the presence of homocysteine (Hcy) acts as an independent risk factor for AS. However, the underlying mechanisms remain to be elucidated. Phosphatase and tensin homologue on chromosome 10 (PTEN), is endogenously expressed in VSMCs and induces multiple signaling networks involved in cell proliferation, survival and inflammation, however, the specific role of PTEN is still unknown. The present study detected the proliferation ratio of VSMCs following treatment with Hcy and Resveratrol (RSV). In the 100 µM Hcy group, the proliferation ratio increased, and treatment with RSV decreased the proliferation ratio induced by Hcy. Reverse transcription‑quantitative polymerase chain reaction and western blotting were used to analyze PTEN expression, RSV treatment was associated with decreased PTEN expression levels in VSMCs. PTEN levels were decreased in Hcy treated cells, and the proliferation ratio of VSMCs were increased following treated with Hcy. To study the mechanism of regulation of PTEN by Hcy, the present study detected PTEN methylation levels in VSMCs, and PTEN DNA methylation levels were demonstrated to be increased in the 100 µM Hcy group, whereas treatment with RSV decreased the methylation status. DNA methyltransferase 1 is important role in the regulation of PTEN methylation. Overall, Hcy impacts the methylation status of PTEN, which is involved in cell proliferation, and induces the proliferation of VSMCs. This effect is alleviated by treatment with RSV, which exhibits an antagonistic mechanism against Hcy.

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