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Zhang Y, Liang Q, Zhang Y, Hong L, Lei D, Zhang L. Olmesartan alleviates bleomycin-mediated vascular smooth muscle cell senescence via the miR-665/SDC1 axis. Am J Transl Res 2020; 12:5205-5220. [PMID: 33042414 PMCID: PMC7540088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 08/01/2020] [Indexed: 12/08/2022]
Abstract
Olmesartan (OMST) is a new angiotensin II receptor antagonist recently approved by the FDA to treat cardiovascular diseases. We investigated the molecular mechanisms by which OMST regulates vascular senescence. In the present study, bleomycin (BLM) was used to induce senescence in vascular smooth muscle cells (VSMCs); after which, the cells were treated with OMST. The effects of OMST on BLM-mediated cell senescence were evaluated using cell adhesion, NAD+/NADH, and Annevin V/PI double staining assays, as well as by immunofluorescence staining of γH2AX, Edu flow cytometry, and evaluations of senescence-associated β-gal activity. Differentially expressed microRNAs (DEMs) were identified by miRNA microarray assays, and subsequently validated by quantitative real time PCR. Bisulfite sequencing PCR (BSP) was used to detect the methylation status of the miR-665 promoter. The target genes of miR-665 were predicted and confirmed using luciferase reporter assays. We found that miR-665 was upregulated in VSMCs in response to BLM-induced cellular senescence. BSP studies revealed that CpG sites in the promoter region of the miR-665 gene underwent extensive demethylation during BLM-induced cellular senescence, and there was a concomitant up-regulation of miR-665 expression. SDC1 mRNA was identified as a direct target of miR-665. Either miR-665 overexpression or SDC1 knockdown significantly reversed the effects of OMST on BLM-induced VSMC senescence. Moreover, SDC1 overexpression partially reversed the changes that occurred in cells with BLM-induced senescence caused by miR-665 overexpression. Our findings suggest that the miR-665/SDC1 axis functions as a vital modulator of VSMC senescence, and may represent a novel biological target for treating atherosclerosis.
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Affiliation(s)
- Yi Zhang
- Department of Cardiology, The First Affiliated Hospital of Guangdong Pharmaceutical University Guangzhou 510080, Guangdong, China
| | - Qingyang Liang
- Department of Cardiology, The First Affiliated Hospital of Guangdong Pharmaceutical University Guangzhou 510080, Guangdong, China
| | - Yanan Zhang
- College of Veterinary Medicine, Northeast Agricultural University Harbin 150030, China
| | - Lei Hong
- Department of Cardiology, Long Gang Central Hospital of Shenzhen Shenzhen 518116, Guangdong, China
| | - Da Lei
- Department of Cardiology, The First Affiliated Hospital of Guangdong Pharmaceutical University Guangzhou 510080, Guangdong, China
| | - Li Zhang
- Department of Cardiology, The First Affiliated Hospital of Guangdong Pharmaceutical University Guangzhou 510080, Guangdong, China
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Zhu Y, Zuo N, Li B, Xiong Y, Chen H, He H, Sun Z, Hu S, Cheng H, Ao Y, Wang H. The expressional disorder of the renal RAS mediates nephrotic syndrome of male rat offspring induced by prenatal ethanol exposure. Toxicology 2018; 400-401:9-19. [PMID: 29548890 DOI: 10.1016/j.tox.2018.03.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 03/03/2018] [Accepted: 03/12/2018] [Indexed: 12/11/2022]
Abstract
This study aimed to prove that prenatal ethanol exposure (PEE) can induce nephrotic syndrome in male rat offspring and to explore the underlying intrauterine programming mechanisms. Pregnant Wistar rats were intragastrically administered ethanol (4 g/kg d) from gestational day (GD) 9 to GD 20, and the male fetuses were delivered by cesarean section at GD20 and the male adult offspring were euthanized at postnatal week (PW) 24. In vitro, the primary metanephric mesenchyme cells were treated with ethanol at concentrations of 15-60 mM. The results indicated that the kidneys of adult offspring in the PEE group exhibited glomerulosclerosis as well as interstitial fibrosis. The levels of serum creatinine and urine protein were elevated; the serum total cholesterol level was increased and the serum albumin concentration was reduced. In the fetal kidney, developmental retardation was presented in the PEE group via pathological examinations, accompanied by the expressional inhibition of the glial-cell-line-derived neurotrophic factor/c-ret tyrosine kinase receptor (GDNF/c-ret) signaling pathway. Although serum angiotensin II (Ang II) level and the gene expression of renal angiotensin-converting enzyme (ACE) were increased in the PEE group, the expression of renal angiotensin II type 2 receptor (AT2R) was significantly inhibited, accompanied by a reduction in the H3K27ac level on the AT2R gene promoter. In the non-classical renin-angiotensin system (RAS), the expression of renal angiotensin converting enzyme 2 (ACE2) and Mas receptor (MasR) were inhibited in the PEE group. The above changes of the classical and non-classical RAS all sustained from utero to adulthood. In vitro, ethanol elevated the gene expression of ACE and angiotensin II type 1a receptor (AT1aR) whereas it reduced the expression of AT2R, ACE2, and MasR, accompanied by a reduction in the H3K27ac level on AT2R gene promoter. Taken together, these results suggested that PEE can induce fetal kidney developmental retardation and adult nephrotic syndrome, and direct regulation of ethanol to the renal RAS was involved in the mechanism of nephrotic syndrome induced by PEE.
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Affiliation(s)
- Yanan Zhu
- Department of Pharmacology, School of Basic Medical Science of Wuhan University, Wuhan, 430071, China
| | - Na Zuo
- Department of Pharmacology, School of Basic Medical Science of Wuhan University, Wuhan, 430071, China
| | - Bin Li
- Department of Pharmacology, School of Basic Medical Science of Wuhan University, Wuhan, 430071, China
| | - Ying Xiong
- Department of Pharmacology, School of Basic Medical Science of Wuhan University, Wuhan, 430071, China
| | - Haiyun Chen
- Department of Pharmacology, School of Basic Medical Science of Wuhan University, Wuhan, 430071, China
| | - Hangyuan He
- Department of Pharmacology, School of Basic Medical Science of Wuhan University, Wuhan, 430071, China
| | - Zhaoxia Sun
- Department of Pharmacology, School of Basic Medical Science of Wuhan University, Wuhan, 430071, China
| | - Shuangshuang Hu
- Department of Pharmacology, School of Basic Medical Science of Wuhan University, Wuhan, 430071, China
| | - Hui Cheng
- Department of Nephrology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Ying Ao
- Department of Pharmacology, School of Basic Medical Science of Wuhan University, Wuhan, 430071, China; Hubei Provincial Key Laboratory of Developmentally Originated Disorder, Wuhan, 430071, China.
| | - Hui Wang
- Department of Pharmacology, School of Basic Medical Science of Wuhan University, Wuhan, 430071, China; Hubei Provincial Key Laboratory of Developmentally Originated Disorder, Wuhan, 430071, China.
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Gong X, Shao L, Fu YM, Zou Y. Effects of olmesartan on endothelial progenitor cell mobilization and function in carotid atherosclerosis. Med Sci Monit 2015; 21:1189-93. [PMID: 25913171 PMCID: PMC4422112 DOI: 10.12659/msm.892996] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Olmesartan is a type of angiotensin II receptor inhibitor that can reduce the incidence of cardiovascular events. However, its role in the function of endothelial progenitor cells in atherosclerosis patients is still unclear. Our study aimed to explore the effects and mechanism of olmesartan on endothelial progenitor cell mobilization and function in carotid atherosclerosis. MATERIAL/METHODS Forty carotid atherosclerosis patients were enrolled. Patients were administrated olmesartan 20 mg/day for 3 months. Flow cytometry was used for counting circulating endothelial progenitor cells; colorimetric method was used to measure the serum levels of endothelial nitric oxide synthase and nitric oxide. Cell migration, adhesion, and proliferation capacity, and related signaling pathway were also analyzed. Spearman rank correlation analysis was used to investigate the influence of olmesartan on endothelial progenitor cells and clinical characteristics (e.g., sex, age, blood pressure). RESULTS Compared with the control group, the number of circulating endothelial progenitor cells was significantly decreased. Olmesartan can increase circulating endothelial progenitor cells number and the serum levels of eNOS and NO. Furthermore, it can improve cell migration, adhesion, and proliferation capacities. Spearman rank correlation analysis showed there is no relationship between olmesartan promotion effects on endothelial progenitor cell mobilization and the clinical characteristics (P>0.05). P-eNOS and P-Akt expression can be unregulated by RNH-6270 treatment and blocked by LY294002. CONCLUSIONS Olmesartan can effectively promote the endothelial progenitor cells mobilization and improve their function in patients with carotid atherosclerosis, independent of basic characteristics. This process relies on the PI3K/Akt/eNOS signaling pathway.
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Affiliation(s)
- Xin Gong
- Department of Health Care, Yantai Yuhuangding Hospital, Yantai, Shandong, China (mainland)
| | - Li Shao
- Department of Health Care, Yantai Yuhuangding Hospital, Yantai, Shandong, China (mainland)
| | - Yi-Min Fu
- Department of Health Care, Yantai Yuhuangding Hospital, Yantai, Shandong, China (mainland)
| | - Yong Zou
- Department of Health Care, Yantai Yuhuangding Hospital, Yantai, Shandong, China (mainland)
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