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Grainger AT, Pilar N, Li J, Chen MH, Abramson AM, Becker-Pauly C, Shi W. Identification of Mep1a as a susceptibility gene for atherosclerosis in mice. Genetics 2021; 219:6377788. [PMID: 34849841 DOI: 10.1093/genetics/iyab160] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 09/10/2021] [Indexed: 12/21/2022] Open
Abstract
Atherosclerosis is the underlying cause of heart attack, ischemic stroke and peripheral arterial disease, and genetic factors involved remain mostly unidentified. We previously identified a significant locus on mouse chromosome 17 for atherosclerosis, Ath49, in an intercross between BALB/c and SM strains. Ath49 partially overlaps in the confidence interval with Ath22 mapped in an AKR × DBA/2 intercross. Bioinformatics analysis prioritized Mep1a, encoding meprin 1α metalloendopeptidase, as a likely candidate gene for Ath49. To prove causality, Mep1a-/-Apoe-/- mice were generated and compared with Mep1a+/+Apoe-/- mice for atherosclerosis development. Mep1a was found abundantly expressed in atherosclerotic lesions but not in healthy aorta and liver of mice. Mep1a-/- Apoe-/- mice exhibited significant reductions in both early and advanced lesion sizes. Loss of Mep1a led to decreased necrosis but increased macrophage and neutrophil contents in advanced lesions, reduced plasma levels of CXCL5 and an oxidative stress biomarker. In addition, Mep1a-/- mice had significantly reduced triglyceride levels on a chow diet. Thus, Mep1a is a susceptibility gene for atherosclerosis and aggravates atherosclerosis partially through action on oxidative stress and inflammation.
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Affiliation(s)
- Andrew T Grainger
- Departments of Biochemistry & Molecular Genetics, University of Virginia, Charlottesville, VA 22908, USA.,Radiology & Medical Imaging, University of Virginia, Charlottesville, VA 22908, USA
| | - Nathanael Pilar
- Radiology & Medical Imaging, University of Virginia, Charlottesville, VA 22908, USA
| | - Jun Li
- Radiology & Medical Imaging, University of Virginia, Charlottesville, VA 22908, USA
| | - Mei-Hua Chen
- Radiology & Medical Imaging, University of Virginia, Charlottesville, VA 22908, USA
| | - Ashley M Abramson
- Radiology & Medical Imaging, University of Virginia, Charlottesville, VA 22908, USA
| | | | - Weibin Shi
- Departments of Biochemistry & Molecular Genetics, University of Virginia, Charlottesville, VA 22908, USA.,Radiology & Medical Imaging, University of Virginia, Charlottesville, VA 22908, USA
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2
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Ge W, Hou C, Zhang W, Guo X, Gao P, Song X, Gao R, Liu Y, Guo W, Li B, Zhao H, Wang J. Mep1a contributes to Ang II-induced cardiac remodeling by promoting cardiac hypertrophy, fibrosis and inflammation. J Mol Cell Cardiol 2020; 152:52-68. [PMID: 33301800 DOI: 10.1016/j.yjmcc.2020.11.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 11/20/2020] [Accepted: 11/26/2020] [Indexed: 01/12/2023]
Abstract
Pathological cardiac remodeling, characterized by excessive deposition of extracellular matrix proteins and cardiac hypertrophy, leads to the development of heart failure. Meprin α (Mep1a), a zinc metalloprotease, previously reported to participate in the regulation of inflammatory response and fibrosis, may also contribute to cardiac remodeling, although whether and how it participates in this process remains unknown. Here, in this work, we investigated the role of Mep1a in pathological cardiac remodeling, as well as the effects of the Mep1a inhibitor actinonin on cardiac remodeling-associated phenotypes. We found that Mep1a deficiency or chemical inhibition both significantly alleviated TAC- and Ang II-induced cardiac remodeling and dysfunction. Mep1a deletion and blocking both attenuated TAC- and Ang II-induced heart enlargement and increases in the thickness of the left ventricle anterior and posterior walls, and reduced expression of pro-hypertrophic markers, including atrial natriuretic peptide (ANP), brain natriuretic peptide (BNP), and myosin heavy chain beta (β-MHC). In addition, Mep1a deletion and blocking significantly inhibited TAC- and Ang II-induced cardiac fibroblast activation and production of extracellular matrix (ECM). Moreover, in Mep1a-/- mice and treatment with actinonin significantly reduced Ang II-induced infiltration of macrophages and proinflammatory cytokines. Notably, we found that in vitro, Mep1a is expressed in cardiac myocytes and fibroblasts and that Mep1a deletion or chemical inhibition both markedly suppressed Ang II-induced hypertrophy of rat or mouse cardiac myocytes and activation of rat or mouse cardiac fibroblasts. In addition, blocking Mep1a in macrophages reduced Ang II-induced expression of interleukin (IL)-6 and IL-1β, strongly suggesting that Mep1a participates in cardiac remodeling processes through regulation of inflammatory cytokine expression. Mechanism studies revealed that Mep1a mediated ERK1/2 activation in cardiac myocytes, fibroblasts and macrophages and contributed to cardiac remodeling. In light of our findings that blocking Mep1a can ameliorate cardiac remodeling via inhibition of cardiac hypertrophy, fibrosis, and inflammation, Mep1a may therefore serve as a strong potential candidate for therapeutic targeting to prevent cardiac remodeling.
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Affiliation(s)
- Weipeng Ge
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Institute of Basic Medical Sciences, Department of Pathophysiology, Peking Union Medical College, Beijing, China
| | - Cuiliu Hou
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Institute of Basic Medical Sciences, Department of Pathophysiology, Peking Union Medical College, Beijing, China
| | - Wei Zhang
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Institute of Basic Medical Sciences, Department of Pathophysiology, Peking Union Medical College, Beijing, China
| | - Xiaoxiao Guo
- Department of Cardiology, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Pan Gao
- Department of Geriatrics, Southwest Hospital, The First Affiliate Hospital to Army Medical University, Chongqing, China
| | - Xiaomin Song
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Institute of Basic Medical Sciences, Department of Pathophysiology, Peking Union Medical College, Beijing, China
| | - Ran Gao
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Institute of Basic Medical Sciences, Department of Pathophysiology, Peking Union Medical College, Beijing, China
| | - Ying Liu
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Department of Physiology, Peking Union Medical College, Beijing, China
| | - Wenjun Guo
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Institute of Basic Medical Sciences, Department of Pathophysiology, Peking Union Medical College, Beijing, China
| | - Bolun Li
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Institute of Basic Medical Sciences, Department of Pathophysiology, Peking Union Medical College, Beijing, China
| | - Hongmei Zhao
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Institute of Basic Medical Sciences, Department of Pathophysiology, Peking Union Medical College, Beijing, China.
| | - Jing Wang
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Institute of Basic Medical Sciences, Department of Pathophysiology, Peking Union Medical College, Beijing, China.
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3
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Yang X, Zhang D, Li J, Ji W, Yang N, Gu S, Wu Q, Jiang Q, Shi P, Li L. A mitochondrion-targeting Mn(ii)-terpyridine complex for two-photon photodynamic therapy. Chem Commun (Camb) 2020; 56:9032-9035. [PMID: 32643722 DOI: 10.1039/d0cc02051f] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
We developed a mitochondrion-targeting MnII-terpyridine complex (MTP) for two-photon photodynamic therapy. MTP was subjected to two-photon excitation in the NIR region to generate 1O2 and hence produce a PDT effect. This use of MTP overcame the drawbacks of traditional PDT agents. The MnII center of MTP apparently catalyzed the H2O2-mediated production of ROS and oxygen, which subsequently promoted the 1O2 generation, furthering the PDT effect. Additionally, the mitochondrion targeting of MTP provided a good spatial condition for the generation of 1O2, which further promoted the PDT effect.
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Affiliation(s)
- Xinda Yang
- School of Chemical Engineering, Jiangsu Key Laboratory of Function Control Technology for Advanced Materials, Jiangsu Ocean University, Lianyungang 222005, China.
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4
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Gao R, Liu D, Guo W, Ge W, Fan T, Li B, Gao P, Liu B, Zheng Y, Wang J. Meprin-α (Mep1A) enhances TNF-α secretion by mast cells and aggravates abdominal aortic aneurysms. Br J Pharmacol 2020; 177:2872-2885. [PMID: 32072633 DOI: 10.1111/bph.15019] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 01/03/2020] [Accepted: 01/29/2020] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND AND PURPOSE Abdominal aorticaneurysm (AAA) rupture is mainly due to elastic lamina degradation. As a metalloendopeptidase, meprin-α (Mep1A) critically modulates the activity of proteins and inflammatory cytokines in various diseases. Here, we sought to investigate the functional role of Mep1A in AAA formation and rupture. EXPERIMENTAL APPROACH AAA tissues were detected by using real-time PCR (RT-PCR), western blotting (WB), and immunohistochemistry. Further mechanistic studies used RT-PCR, WB, and enzyme-linked immunosorbent assays. KEY RESULTS Mep1A mediated AAA formation by regulating the mast cell (MC) secretion of TNF-α, which promoted matrix metalloproteinase (MMP) expression and apoptosis in smooth muscle cells (SMCs). Importantly, increased Mep1A expression was found in human AAA tissues and in angiotensin II-induced mouse AAA tissues. Mep1A deficiency reduced AAA formation and increased the survival rate of AAA mice. Pathological analysis showed that Mep1A deletion decreased elastic lamina degradation and SMC apoptosis in AAA tissues. Furthermore, Mep1A was expressed mainly in MCs, wherein it mediated TNF-α expression. Mep1A inhibitor actinonin significantly inhibited TNF-α secretion in MCs. TNF-α secreted by MCs enhanced MMP2 expression in SMCs and promoted SMC apoptosis. CONCLUSION AND IMPLICATIONS Taken together, these data suggest that Mep1A may be vital in AAA pathophysiology by regulating TNF-α production by MCs. Knocking out Mep1A significantly decreased AAA diameter and improved AAA stability in mice. Therefore, Mep1A is a potential new therapeutic target in the development of AAA.
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Affiliation(s)
- Ran Gao
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Department of Pathophysiology, Peking Union Medical College, Beijing, China
| | - Duan Liu
- Peking Union Medical College Hospital, Beijing, China
| | - Wenjun Guo
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Department of Pathophysiology, Peking Union Medical College, Beijing, China
| | - Weipeng Ge
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Department of Pathophysiology, Peking Union Medical College, Beijing, China
| | - Tianfei Fan
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Department of Pathophysiology, Peking Union Medical College, Beijing, China
| | - Bolun Li
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Department of Pathophysiology, Peking Union Medical College, Beijing, China
| | - Pan Gao
- Department of Geriatrics, Southwest Hospital, The First Affiliated Hospital to Army Medical University, Chongqing, China
| | - Bin Liu
- Aab Cardiovascular Research Institute, University of Rochester, Rochester, USA
| | - Yuehong Zheng
- Peking Union Medical College Hospital, Beijing, China
| | - Jing Wang
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Department of Pathophysiology, Peking Union Medical College, Beijing, China
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5
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Ni Y, Zhang H, Chai C, Peng B, Zhao A, Zhang J, Li L, Zhang C, Ma B, Bai H, Lim K, Huang W. Mitochondria-Targeted Two-Photon Fluorescent Photosensitizers for Cancer Cell Apoptosis via Spatial Selectability. Adv Healthc Mater 2019; 8:e1900212. [PMID: 31081268 DOI: 10.1002/adhm.201900212] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 03/18/2019] [Indexed: 12/14/2022]
Abstract
Organelle-targeted photosensitizers have been reported to be effective cell apoptosis agents. Mitochondria is recognized as an ideal target for cancer treatment due to its central role in oxidative metabolism and apoptosis. Meanwhile, two-photon (TP) fluorescence microscopy has become a powerful tool for fluorescence imaging in biological events based on its minimizing photodamage/photobleaching and intrinsic 3D resolution in deep tissues and in vivo. In this study, a series of novel mitochondrial-targeted TP fluorescent photosensitizers (TP-tracers) are designed, synthesized, and systematically investigated. These TP-tracers exhibit extraordinary anti-interference capability among different cations, anions, and amino acids as well as the insensitivity to the changes of pH and complex biological environments. TP-tracers are further used in fluorescence living cells, Drosophila brains, and zebrafish imaging with low cytotoxicity, excellent mitochondria-targeting, and TP properties. The results demonstrate efficient mitochondria-targeting cell selective apoptosis based on TP-activated cancer cells with highly single cell selectivity, and the pharmacokinetic study reveals that MitoY2 does not have accumulation in rats. It is believed that these molecules hold great potential in TP-related smart phototherapy.
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Affiliation(s)
- Yun Ni
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM)Nanjing Tech University (NanjingTech) Nanjing 210009 P. R. China
| | - Hang Zhang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM)Nanjing Tech University (NanjingTech) Nanjing 210009 P. R. China
| | - Chou Chai
- National Neuroscience Institute Singapore 308433 Singapore
| | - Bo Peng
- Shaanxi Institute of Flexible Electronics (SIFE)Northwestern Polytechnical University (NPU) Xi'an 710072 P. R. China
| | - Ang Zhao
- School of Pharmaceutical SciencesNanjing Tech University Nanjing 210023 P. R. China
| | - Jie Zhang
- School of Pharmaceutical SciencesNanjing Tech University Nanjing 210023 P. R. China
| | - Lin Li
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM)Nanjing Tech University (NanjingTech) Nanjing 210009 P. R. China
| | - Chengwu Zhang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM)Nanjing Tech University (NanjingTech) Nanjing 210009 P. R. China
| | - Bo Ma
- School of Pharmaceutical SciencesNanjing Tech University Nanjing 210023 P. R. China
| | - Hua Bai
- Shaanxi Institute of Flexible Electronics (SIFE)Northwestern Polytechnical University (NPU) Xi'an 710072 P. R. China
| | - Kah‐Leong Lim
- National Neuroscience Institute Singapore 308433 Singapore
| | - Wei Huang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM)Nanjing Tech University (NanjingTech) Nanjing 210009 P. R. China
- Shaanxi Institute of Flexible Electronics (SIFE)Northwestern Polytechnical University (NPU) Xi'an 710072 P. R. China
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Breig O, Yates M, Neaud V, Couchy G, Grigoletto A, Lucchesi C, Prox J, Zucman-Rossi J, Becker-Pauly C, Rosenbaum J. Metalloproteinase meprin α regulates migration and invasion of human hepatocarcinoma cells and is a mediator of the oncoprotein Reptin. Oncotarget 2018; 8:7839-7851. [PMID: 27999200 PMCID: PMC5352365 DOI: 10.18632/oncotarget.13975] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 11/30/2016] [Indexed: 01/13/2023] Open
Abstract
Hepatocellular carcinoma is associated with a high rate of intra-hepatic invasion that carries a poor prognosis. Meprin alpha (Mep1A) is a secreted metalloproteinase with many substrates relevant to cancer invasion. We found that Mep1A was a target of Reptin, a protein that is oncogenic in HCC. We studied Mep1A regulation by Reptin, its role in HCC, and whether it mediates Reptin oncogenic effects. MepA and Reptin expression was measured in human HCC by qRT-PCR and in cultured cells by PCR, western blot and enzymatic activity measurements. Cell growth was assessed by counting and MTS assay. Cell migration was measured in Boyden chambers and wound healing assays, and cell invasion in Boyden chambers. Silencing Reptin decreased Mep1A expression and activity, without affecting meprin β. Mep1A, but not meprin β, was overexpressed in a series of 242 human HCC (2.04 fold, p < 0.0001), and a high expression correlated with a poor prognosis. Mep1A and Reptin expressions were positively correlated (r = 0.39, p < 0.0001). Silencing Mep1A had little effect on cell proliferation, but decreased cell migration and invasion of HuH7 and Hep3B cells. Conversely, overexpression of Mep1A or addition of recombinant Mep1A increased migration and invasion. Finally, overexpression of Mep1A restored a normal cell migration in cells where Reptin was depleted. Mep1A is overexpressed in most HCC and induces HCC cell migration and invasion. Mep1A expression is regulated by Reptin, and Mep1A mediates Reptin-induced migration. Overall, we suggest that Mep1A may be a useful target in HCC.
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Affiliation(s)
- Osman Breig
- University Bordeaux, INSERM, U1053, BordeAux Research in Translational Oncology, BaRITOn, Bordeaux, France
| | - Maïlyn Yates
- University Bordeaux, INSERM, U1053, BordeAux Research in Translational Oncology, BaRITOn, Bordeaux, France
| | - Véronique Neaud
- University Bordeaux, INSERM, U1053, BordeAux Research in Translational Oncology, BaRITOn, Bordeaux, France
| | - Gabrielle Couchy
- Inserm, U1162, Génomique Fonctionnelle des Tumeurs Solides, Université Paris Diderot, Université Paris Descartes, Université Paris 13, Paris, France
| | - Aude Grigoletto
- University Bordeaux, INSERM, U1053, BordeAux Research in Translational Oncology, BaRITOn, Bordeaux, France
| | | | - Johannes Prox
- Unit for Degradomics of the Protease Web, University of Kiel, Germany
| | - Jessica Zucman-Rossi
- Inserm, U1162, Génomique Fonctionnelle des Tumeurs Solides, Université Paris Diderot, Université Paris Descartes, Université Paris 13, Paris, France
| | | | - Jean Rosenbaum
- University Bordeaux, INSERM, U1053, BordeAux Research in Translational Oncology, BaRITOn, Bordeaux, France
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Liang X, Yang LX, Guo R, Shi Y, Hou X, Yang Z, Zhou X, Liu H. Atorvastatin attenuates plaque vulnerability by downregulation of EMMPRIN expression via COX-2/PGE2 pathway. Exp Ther Med 2017; 13:835-844. [PMID: 28450907 PMCID: PMC5403495 DOI: 10.3892/etm.2017.4062] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 09/06/2016] [Indexed: 01/23/2023] Open
Abstract
Extracellular matrix metalloproteinase inducer (EMMPRIN) reportedly has a key regulatory role in matrix metalloproteinase (MMP) activities and the progression of atherosclerosis. Statins, which are anti-atherosclerotic pharmacological agents, are widely applied in clinical settings. The aim of the present study was to investigate the pharmaceutical effect of atorvastatin on EMMPRIN expression in atherosclerotic plaques. An atherosclerotic mouse model was established using apoliprotein E-deficient (ApoE−/−) mice raised on a high-fat diet. Additionally, a low (5 mg/kg/day) or high dosage (10 mg/kg/day) of atorvastatin suspension was administered orally for eight weeks, beginning on week 7 or 11 respectively. The effects of atorvastatin on atherosclerotic plaque formation and EMMPRIN expression were subsequently determined. The THP-1 cell line was used to investigate the effect of atorvastatin on EMMPRIN expression in vitro. The results demonstrated that the high-fat diet led to vulnerable plaques (VPs) and increased EMMPRIN expression in VPs in ApoE−/− mice. Atorvastatin treatment decreased EMMPRIN expression in the aortas and plaques of ApoE−/− mice. In vitro, oxidized low-density lipoprotein (ox-LDL) induced the expression of cyclooxygenase-2 (COX-2) and EMMPRIN in THP-1 macrophages, and atorvastatin inhibited ox-LDL-induced expression of PGE2, EMMPRIN and COX-2 in THP-1 macrophages. Therefore, the present data indicated that atorvastatin treatment reduces the vulnerability of atherosclerotic plaques and expression of EMMPRIN, and that the inhibitory effect of atorvastatin on EMMPRIN may occur via the COX-2/PGE2 signaling pathway in macrophages.
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Affiliation(s)
- Xing Liang
- Department of Cardiology, Kunming General Hospital of Chengdu Military Area, Kunming, Yunnan 650032, P.R. China
| | - Li-Xia Yang
- Department of Cardiology, Kunming General Hospital of Chengdu Military Area, Kunming, Yunnan 650032, P.R. China
| | - Ruiwei Guo
- Department of Cardiology, Kunming General Hospital of Chengdu Military Area, Kunming, Yunnan 650032, P.R. China
| | - Yankun Shi
- Department of Cardiology, Kunming General Hospital of Chengdu Military Area, Kunming, Yunnan 650032, P.R. China
| | - Xianhua Hou
- Department of Neurology, Southwestern Hospital, Third Military Medical University, Chongqing 400038, P.R. China
| | - Zhihua Yang
- Department of Cardiology, Kunming General Hospital of Chengdu Military Area, Kunming, Yunnan 650032, P.R. China
| | - Xiaobin Zhou
- Department of Cardiology, Kunming General Hospital of Chengdu Military Area, Kunming, Yunnan 650032, P.R. China
| | - Hong Liu
- Department of Cardiology, Kunming General Hospital of Chengdu Military Area, Kunming, Yunnan 650032, P.R. China
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Zhang GH, Chao M, Hui LH, Xu DL, Cai WL, Zheng J, Gao M, Zhang MX, Wang J, Lu QH. Poly(ADP-ribose)polymerase 1 inhibition protects against age-dependent endothelial dysfunction. Clin Exp Pharmacol Physiol 2016; 42:1266-74. [PMID: 26331430 DOI: 10.1111/1440-1681.12484] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Revised: 08/23/2015] [Accepted: 08/25/2015] [Indexed: 11/28/2022]
Abstract
Age-related endothelial dysfunction is closely associated with the local production of reactive oxygen species (ROS) within and in the vicinity of the vascular endothelium. Oxidant-induced DNA damage can activate the nuclear enzyme poly(ADP-ribose) polymerase 1 (PARP-1), leading to endothelial dysfunction in various pathophysiological conditions. The present study aimed to investigate the role of PARP-1 in age-dependent changes in endothelial cell function and its underlying mechanism. Wild-type (WT) and PARP-1(-/-) mice were divided into young (2 months) and old (12 months) groups. Isolated aortic rings were suspended to record isometric tension to assess endothelial function. Nitric oxide (NO) production and content in plasma were detected by spectrophotometry. Superoxide (O2(-) production was detected by dihydroethidium. Expression of PARP-1, endothelial nitric oxide synthase (eNOS), induced nitric oxide synthase (iNOS), and arginase-2 (Arg2) was assessed by western blot analysis. Endothelium-dependent relaxation in response to acetylcholine was lost in old WT, but not PARP-1(-/-), mice. Endothelium-independent vasodilation was not impaired in aging mice. Production of O2(-) was greater in aging WT mice than young or aging PARP-1(-/-) mice. eNOS expression was not affected by aging in WT or PARP-1(-/-) mice, but p-eNOS expression decreased and iNOS and Arg2 levels were upregulated only in aging WT mice. In conclusion, PARP-1 inhibition may protect against age-dependent endothelial dysfunction, potentially by regulating NO bioavailability via iNOS. Inhibition of PARP-1 may help in vascular aging prevention.
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Affiliation(s)
- Guang-hao Zhang
- Department of Cardiology, The Second Hospital of Shandong University, Jinan, China.,Department of Cardiology, Taian City Central Hospital, Shandong, China
| | - Min Chao
- Department of Anorectal surgery, Afliated Hospital of Jining Medical College, Jining, Shandong, China
| | - Long-hua Hui
- The First Sanatorium of Jinan Military Region in Qingdao, Shandong, China.,Department of Cardiology, QiLu Hospital of Shandong University, Jinan, China
| | - Dong Ling Xu
- Department of Cardiology, The Second Hospital of Shandong University, Jinan, China
| | - We-li Cai
- Department of Cardiology, The Third Hospital, Jinan, China
| | - Jie Zheng
- Department of Cardiology, The Second Hospital of Shandong University, Jinan, China
| | - Min Gao
- Department of Cardiology, The Second Hospital of Shandong University, Jinan, China
| | - Ming-xiang Zhang
- Department of Cardiology, The Second Hospital of Shandong University, Jinan, China
| | - Juan Wang
- Department of Cardiology, The Second Hospital of Shandong University, Jinan, China
| | - Qing-hua Lu
- Department of Cardiology, The Second Hospital of Shandong University, Jinan, China
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9
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Wang XM, Xiao H, Liu LL, Cheng D, Li XJ, Si LY. FGF21 represses cerebrovascular aging via improving mitochondrial biogenesis and inhibiting p53 signaling pathway in an AMPK-dependent manner. Exp Cell Res 2016; 346:147-56. [PMID: 27364911 DOI: 10.1016/j.yexcr.2016.06.020] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 06/02/2016] [Accepted: 06/25/2016] [Indexed: 12/21/2022]
Abstract
Cerebrovascular aging has a high relationship with stroke and neurodegenerative disease. In the present study, we evaluated the influence of fibroblast growth factor 21 (FGF21) on angiotensin (Ang II)-mediated cerebrovascular aging in human brain vascular smooth muscle cells (hBVSMCs). Ang II induced remarkable aging-phenotypes in hBVSMCs, including enhanced SA-β-gal staining and NBS1 protein expression. First, we used immunoblotting assay to confirm protein expression of FGF21 receptor (FGFR1) and the co-receptor β-Klotho in cultured hBVSMCs. Second, we found that FGF21 treatment partly prevented the aging-related changes induced by Ang II. FGF21 inhibited Ang II-enhanced ROS production/superoxide anion levels, rescued the Ang II-reduced Complex IV and citrate synthase activities, and suppressed the Ang II-induced meprin protein expression. Third, we showed that FGF21 not only inhibited the Ang II-induced p53 activation, but also blocked the action of Ang II on Siah-1-TRF signaling pathway which is upstream factors for p53 activation. At last, either chemical inhibition of AMPK signaling pathway by a specific antagonist Compound C or knockdown of AMPKα1/2 isoform using siRNA, successfully abolished the anti-aging action of FGF21 in hBVSMCs. These results indicate that FGF21 protects against Ang II-induced cerebrovascular aging via improving mitochondrial biogenesis and inhibiting p53 activation in an AMPK-dependent manner, and highlight the therapeutic value of FGF21 in cerebrovascular aging-related diseases such as stroke and neurodegenerative disease.
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Affiliation(s)
- Xiao-Mei Wang
- Department of Geriatrics, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Hang Xiao
- Department of Geriatrics, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Ling-Lin Liu
- Department of Geriatrics, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Dang Cheng
- Department of Geriatrics, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Xue-Jun Li
- Department of Geriatrics, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Liang-Yi Si
- Department of Geriatrics, Southwest Hospital, Third Military Medical University, Chongqing, China.
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10
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Di Pietro N, Formoso G, Pandolfi A. Physiology and pathophysiology of oxLDL uptake by vascular wall cells in atherosclerosis. Vascul Pharmacol 2016; 84:1-7. [PMID: 27256928 DOI: 10.1016/j.vph.2016.05.013] [Citation(s) in RCA: 177] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Revised: 04/26/2016] [Accepted: 05/28/2016] [Indexed: 01/09/2023]
Abstract
Atherosclerosis is a progressive disease in which endothelial cell dysfunction, macrophage foam cell formation, and smooth muscle cell migration and proliferation, lead to the loss of vascular homeostasis. Oxidized low-density lipoprotein (oxLDL) may play a pre-eminent function in atherosclerotic lesion formation, even if their role is still debated. Several types of scavenger receptors (SRs) such as SR-AI/II, SRBI, CD36, lectin-like oxidized low-density lipoprotein receptor-1 (LOX-1), toll-like receptors (TLRs) and others can promote the internalization of oxLDL. They are expressed on the surface of vascular wall cells (endothelial cells, macrophages and smooth muscle cells) and they mediate the cellular effects of oxLDL. The key influence of both oxLDL and SRs on the atherogenic process has been established in atherosclerosis-prone animals, in which antioxidant treatment and/or silencing of SRs has been shown to reduce atherogenesis. Despite some discrepancies, the indication from cohort studies that there is an association between oxLDL and cardiovascular (CV) events seems to point toward a role for oxLDL in atherosclerotic plaque progress and disruption. Finally, randomized clinical trials using antioxidants have demonstrated benefits only in high-risk patients, suggesting that additional proofs are still needed to better define the involvement of each type of modified LDL in the development of atherosclerosis.
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Chang C, Yang H, Xin SL, Liu JX, Zhao XF, Liu LJ, Han LY, Meng LM, Li Q. The Inhibition of Oxidised Low-Density Lipoprotein-Induced Apoptosis of Macrophages by Recombinant Human Brain Natriuretic Peptide and the Underlying Mechanism. Cardiology 2015; 132:137-46. [PMID: 26278917 DOI: 10.1159/000433464] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Accepted: 05/19/2015] [Indexed: 11/19/2022]
Abstract
OBJECTIVE Macrophage apoptosis plays a key role in atherosclerotic plaque rupture. This study investigated the effects of recombinant human brain natriuretic peptide (BNP) on oxidised low-density lipoprotein (ox-LDL)-induced macrophage apoptosis and explored the underlying mechanism. METHODS A model of ox-LDL-induced macrophage injury was established to evaluate the role of BNP. Flow cytometry was employed to detect apoptosis and changes in mitochondrial membrane potential (x0394;x03A8;m), and confocal microscopy was used to determine cellular reactive oxygen species (ROS) levels. Additionally, reverse transcription-polymerase chain reaction and colourimetry were used to detect the mRNA expression and activity, respectively, of superoxide dismutase (SOD) and malondialdehyde (MDA). RESULTS Ox-LDL induced macrophage apoptosis in a concentration-dependent manner, and maximum apoptosis occurred at 100 μg/ml ox-LDL (45.62 ± 2.76 vs. 6.84 ± 1.94%; p < 0.05). Conversely, BNP suppressed macrophage apoptosis, with a maximal effect at 10-9 mol/l (18.56 ± 1.79%; p < 0.05). Compared with the control group, intracellular ROS levels increased, x0394;x03A8;m decreased, SOD mRNA expression and activity decreased and MDA mRNA expression and content increased in the 100-μg/ml ox-LDL group (527.30 ± 36.20 vs. 100.00 ± 0.00%, 3.01 ± 0.52 vs. 9.67 ± 0.51%, 0.53 ± 0.18 vs. 1.00 ± 0.00, 256.6 ± 8.20 vs. 355.8 ± 9.58 U/ml, 1.59 ± 0.23 vs. 1.00 ± 0.00 and 29.4 ± 1.68 vs. 5.94 ± 0.51 nmol/ml; p < 0.05); these effects were significantly counteracted by 10-9 mol/l BNP (237.30 ± 30.62%, 6.55 ± 1.57%, 0.90 ± 0.07, 310.4 ± 2.97 U/ml, 1.14 ± 0.10, 20.54 ± 1.55 nmol/ml; p < 0.05). CONCLUSION BNP attenuates ox-LDL-induced macrophage apoptosis by suppressing oxidative stress and preventing x0394;x03A8;m loss.
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Affiliation(s)
- Chao Chang
- Department of Cardiology, Handan First Hospital, Handan, PR China
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Gao P, Wang XM, Qian DH, Qin ZX, Jin J, Xu Q, Yuan QY, Li XJ, Si LY. Induction of oxidative stress by oxidized LDL via meprinα-activated epidermal growth factor receptor in macrophages. Cardiovasc Res 2012; 97:533-43. [PMID: 23250920 DOI: 10.1093/cvr/cvs369] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
AIMS The aim of this study was to explore meprinα-mediated transactivation of the epidermal growth factor receptor (EGFR) and reactive oxygen species (ROS) production in macrophages. METHODS AND RESULTS Accelerated atherosclerotic lesions were established by administration of a high-fat diet in apolipoprotein E-deficient (apoE(-/-)) mice. Lentiviral overexpression of meprinα in the thoracic aortic artery during plaque formation enhanced intra-plaque macrophage induction of ROS as well as formation of atherosclerotic plaques, whereas AG1478 (specific inhibitor of the EGFR) treatment exerted the opposite effect. A meprinα inhibitor abrogated EGFR activation in mice. In cultured J774a.1 macrophages, oxidized low-density lipoprotein (OxLDL) increased ROS formation and EGFR activation through a ligand [heparin-binding epidermal growth factor-like growth factor (HB-EGF)]-dependent pathway. However, a meprinα inhibitor or specific siRNA inhibited ROS production and EGFR activation. Recombinant mouse meprinα enhanced OxLDL-stimulated production of ROS and induced HB-EGF. Inhibition of p38 mitogen-activated protein kinase by SB203580 decreased OxLDL-stimulated production of ROS. Conversely, inhibition of meprinα or PI3K-Rac1 inhibitors also decreased p38 activity in OxLDL-stimulated macrophages. In addition, inhibition of meprinα reversed OxLDL-stimulated activation of PI3K. CONCLUSION Meprinα promotes OxLDL-induced plaque formation and ROS release by transactivation of the EGFR, followed by activation of the PI3K/Rac1/p38 pathway.
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Affiliation(s)
- Pan Gao
- Chongqing Key Disciplines, Department of Geriatrics, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
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Zhou BR, Yin HB, Xu Y, Wu D, Zhang ZH, Yin ZQ, Permatasari F, Luo D. Baicalin protects human skin fibroblasts from ultraviolet A radiation-induced oxidative damage and apoptosis. Free Radic Res 2012; 46:1458-71. [PMID: 22946442 DOI: 10.3109/10715762.2012.726355] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Reactive oxygen species (ROS) are an important factor in the development of skin photodamage after ultraviolet A (UVA) radiation. A flavonoid antioxidant, baicalin, can selectively neutralize super-oxide anion (O(2)(-)) while having no significant effect on (•)OH. Fibroblasts are a key component of skin dermis. In the present study, we investigated the protective effects of baicalin on human skin fibroblasts (HSFs) under UVA induced oxidative stress. Fluorescence microscopy and flow cytometry were used to assay the intracellular O(2)(-), NO, ROS concentrations and the mitochondrial membrane potential. Cell viability was determined using the Cell Counting Kit-8 (CCK-8). The concentrations of cellular MDA, SOD, GSH, T-AOC, and 8-oxo-dG were also measured. Cellular apoptosis was measured by flow cytometry and caspase-3 detection. The results revealed that UVA radiation could cause oxidative stress and apoptosis in HSFs. Interestingly, the use of baicalin after UVA radiation significantly reduced the level of intracellular O(2)(-), NO, and ROS, stabilized the mitochondrial membrane potential, and attenuated production of MDA and 8-oxo-dG. These efficiently enhanced the antioxidative defense system and protected the HSFs from subsequent oxidative stress damage and apoptosis. In other words, baicalin decreased the excessive generation of intracellular ROS and NO, and elevated the cellular antioxidative defense, which eventually mitigate the UVA-induced apoptosis. Based on our results, baicalin may have applications in the treatment of skin photodamage caused by UVA irradiation.
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Affiliation(s)
- Bing-rong Zhou
- Department of Dermatology, the First Affiliated Hospital of Nanjing Medical University, China
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Kim SJ, Park JH, Kim KH, Lee WR, An HJ, Min BK, Han SM, Kim KS, Park KK. Apamin inhibits THP-1-derived macrophage apoptosis via mitochondria-related apoptotic pathway. Exp Mol Pathol 2012; 93:129-34. [PMID: 22537544 DOI: 10.1016/j.yexmp.2012.04.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Accepted: 04/09/2012] [Indexed: 10/28/2022]
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Qin ZX, Yu P, Qian DH, Song MB, Tan H, Yu Y, Li W, Wang H, Liu J, Wang Q, Sun XJ, Jiang H, Zhu JK, Lu W, Huang L. Hydrogen-rich saline prevents neointima formation after carotid balloon injury by suppressing ROS and the TNF-α/NF-κB pathway. Atherosclerosis 2011; 220:343-50. [PMID: 22153150 DOI: 10.1016/j.atherosclerosis.2011.11.002] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2011] [Revised: 11/04/2011] [Accepted: 11/04/2011] [Indexed: 11/27/2022]
Abstract
BACKGROUND Reactive oxygen species (ROS) play a pivotal role in neointima hyperplasia after balloon injury. Molecular hydrogen has emerged as a novel antioxidant and has been proven effective in treating many diseases. OBJECTIVES We aimed to determine the mechanism by which hydrogen affects neointima formation. METHODS We assessed the influence of a hydrogen-rich saline solution (HRSS) by daily injection in rats. Rats were euthanized to evaluate the neointima. ROS, malondialdehyde (MDA) and superoxide dismutase (SOD) and reduced glutathione (GSH), were detected in the injured artery. Macrophage infiltration and the production of inflammatory factors (i.e., IL-6, TNF-α and NF-κB) were also observed. The in vitro effects of hydrogen on vascular smooth muscle cell (VSMC) proliferation were also measured. RESULTS HRSS decreased the neointima area significantly. The neointima/media ratio was also reduced by HRSS. There was a decline in the number of PCNA-positive cells in the intima treated with HRSS. Meanwhile, HRSS ameliorated the ROS and MDA levels and increased SOD, reduced GSH levels in the injured carotid. In addition, the levels of inflammatory factors, such as IL-6, TNF-α and NF-κB p65, were attenuated by HRSS. In vitro studies also confirmed the anti-proliferative capability of the hydrogen solution and ROS generation in VSMCs induced by PDGF-BB. CONCLUSION HRSS may have a protective role in the prevention of neointima hyperplasia and restenosis after angioplasty. HRSS may partially exert its role by neutralizing the local ROS and suppressing the TNF-α/NF-κB pathway.
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Affiliation(s)
- Zhe-xue Qin
- Institute of Cardiovascular Diseases of PLA, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, People's Republic of China
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Gao P, Si LY. Meprin-α metalloproteases enhance lipopolysaccharide-stimulated production of tumour necrosis factor-α and interleukin-1β in peripheral blood mononuclear cells via activation of NF-κB. ACTA ACUST UNITED AC 2010; 160:99-105. [DOI: 10.1016/j.regpep.2009.12.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2009] [Revised: 11/05/2009] [Accepted: 12/14/2009] [Indexed: 12/23/2022]
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