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Duan M, Chen H, Yin L, Zhu X, Novák P, Lv Y, Zhao G, Yin K. Mitochondrial apolipoprotein A-I binding protein alleviates atherosclerosis by regulating mitophagy and macrophage polarization. Cell Commun Signal 2022; 20:60. [PMID: 35525979 PMCID: PMC9077873 DOI: 10.1186/s12964-022-00858-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 03/05/2022] [Indexed: 12/22/2022] Open
Abstract
Apolipoprotein A-I binding protein (AIBP), a secreted protein, has been shown to play a pivotal role in the development of atherosclerosis. The function of intracellular AIBP, however, is not yet well characterized. Here, we found that AIBP is abundantly expressed within human and mouse atherosclerotic lesions and exhibits a distinct localization in the inner membrane of mitochondria in macrophages. Bone marrow-specific AIBP deficiency promotes the progression of atherosclerosis and increases macrophage infiltration and inflammation in low-density lipoprotein receptor-deficient (LDLR-/-) mice. Specifically, the lack of mitochondrial AIBP leads to mitochondrial metabolic disorders, thereby reducing the formation of mitophagy by promoting the cleavage of PTEN-induced putative kinase 1 (PINK1). With the reduction in mitochondrial autophagy, macrophages polarize to the M1 proinflammatory phenotype, which further promotes the development of atherosclerosis. Based on these results, mitochondrial AIBP in macrophages performs an antiatherosclerotic role by regulating of PINK1-dependent mitophagy and M1/M2 polarization. Video Abstract.
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Affiliation(s)
- Meng Duan
- Department of Cardiology, The Second Affiliated Hospital of Guilin Medical University, Guangxi Key Laboratory of Diabetic Systems Medicine, Guilin, 541100 Guangxi China
- Guangxi Key Laboratory of Diabetic Systems Medicine, Guilin Medical University, Guilin, Guangxi China
- Research Lab of Translational Medicine, Hengyang Medical School, University of South China, Hengyang, China
| | - Hainan Chen
- Research Lab of Translational Medicine, Hengyang Medical School, University of South China, Hengyang, China
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-Sen University, Guangzhou, China
| | - Linjie Yin
- Research Lab of Translational Medicine, Hengyang Medical School, University of South China, Hengyang, China
| | - Xiao Zhu
- Guangxi Key Laboratory of Diabetic Systems Medicine, Guilin Medical University, Guilin, Guangxi China
| | - Petr Novák
- Guangxi Key Laboratory of Diabetic Systems Medicine, Guilin Medical University, Guilin, Guangxi China
| | - Yuncheng Lv
- Guangxi Key Laboratory of Diabetic Systems Medicine, Guilin Medical University, Guilin, Guangxi China
| | - Guojun Zhao
- The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan City People’s Hospital, Qingyuan, 511518 Guangdong China
| | - Kai Yin
- Department of Cardiology, The Second Affiliated Hospital of Guilin Medical University, Guangxi Key Laboratory of Diabetic Systems Medicine, Guilin, 541100 Guangxi China
- Guangxi Key Laboratory of Diabetic Systems Medicine, Guilin Medical University, Guilin, Guangxi China
- Research Lab of Translational Medicine, Hengyang Medical School, University of South China, Hengyang, China
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Seneviratne A, Cave L, Hyde G, Moestrup SK, Carling D, Mason JC, Haskard DO, Boyle JJ. Metformin directly suppresses atherosclerosis in normoglycaemic mice via haematopoietic adenosine monophosphate-activated protein kinase. Cardiovasc Res 2021; 117:1295-1308. [PMID: 32667970 PMCID: PMC8064441 DOI: 10.1093/cvr/cvaa171] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 06/03/2018] [Accepted: 06/22/2020] [Indexed: 12/31/2022] Open
Abstract
AIMS Atherosclerotic vascular disease has an inflammatory pathogenesis. Heme from intraplaque haemorrhage may drive a protective and pro-resolving macrophage M2-like phenotype, Mhem, via AMPK and activating transcription factor 1 (ATF1). The antidiabetic drug metformin may also activate AMPK-dependent signalling. Hypothesis: Metformin systematically induces atheroprotective genes in macrophages via AMPK and ATF1, thereby suppresses atherogenesis. METHODS AND RESULTS Normoglycaemic Ldlr-/- hyperlipidaemic mice were treated with oral metformin, which profoundly suppressed atherosclerotic lesion development (P < 5 × 10-11). Bone marrow transplantation from AMPK-deficient mice demonstrated that metformin-related atheroprotection required haematopoietic AMPK [analysis of variance (ANOVA), P < 0.03]. Metformin at a clinically relevant concentration (10 μM) evoked AMPK-dependent and ATF1-dependent increases in Hmox1, Nr1h2 (Lxrb), Abca1, Apoe, Igf1, and Pdgf, increases in several M2-markers and decreases in Nos2, in murine bone marrow macrophages. Similar effects were seen in human blood-derived macrophages, in which metformin-induced protective genes and M2-like genes, suppressible by si-ATF1-mediated knockdown. Microarray analysis comparing metformin with heme in human macrophages indicated that the transcriptomic effects of metformin were related to those of heme, but not identical. Metformin-induced lesional macrophage expression of p-AMPK, p-ATF1, and downstream M2-like protective effects. CONCLUSION Metformin activates a conserved AMPK-ATF1-M2-like pathway in mouse and human macrophages, and results in highly suppressed atherogenesis in hyperlipidaemic mice via haematopoietic AMPK.
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Affiliation(s)
| | - Luke Cave
- National Heart and Lung Institute, Imperial College London, London, UK
| | - Gareth Hyde
- National Heart and Lung Institute, Imperial College London, London, UK
| | | | - David Carling
- MRC London Institute of Medical Sciences, Imperial College London, UK
| | - Justin C Mason
- National Heart and Lung Institute, Imperial College London, London, UK
| | - Dorian O Haskard
- National Heart and Lung Institute, Imperial College London, London, UK
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Yamashita T, Ahmad S, Wright KN, Roberts DJ, VonCannon JL, Wang H, Groban L, Dell’Italia LJ, Ferrario CM. Noncanonical Mechanisms for Direct Bone Marrow Generating Ang II (Angiotensin II) Predominate in CD68 Positive Myeloid Lineage Cells. Hypertension 2020; 75:500-509. [PMID: 31813348 PMCID: PMC6949383 DOI: 10.1161/hypertensionaha.119.13754] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 11/06/2019] [Indexed: 12/18/2022]
Abstract
Bone marrow (BM) Ang II (angiotensin II) is a major participant in the regulation of hematopoiesis and immunity. The novel tissue substrate Ang-(1-12) [angiotensin-(1-12)] and its cleaving enzyme chymase are an essential source of Ang II production in cardiac tissue. We hypothesized this noncanonical chymase-mediated Ang II-producing mechanism exists in the BM tissue. Immunohistostaining and flow cytometry confirmed the presence of Ang-(1-12) immunoreaction in the BM of SD (Sprague Dawley) rats. Chymase-mediated Ang II-producing activity in BM was ≈1000-fold higher than ACE (angiotensin-converting enzyme)-mediated Ang II-producing activity (4531±137 and 4.2±0.3 fmol/min per mg, respectively; n=6; P<0.001) and 280-fold higher than chymase activity in the left ventricle of 16.3±1.7 fmol/min per mg (P<0.001). Adding a selective chymase inhibitor, TEI-F00806, eliminated almost all 125I-Ang II production. Flow cytometry demonstrated that delta median fluorescence intensity of chymase in cluster of differentiation 68 positive cells was significantly higher than that in cluster of differentiation 68 negative cells (1546±157 and 222±48 arbitrary units, respectively; P=0.0021). Cluster of differentiation 68 positive and side scatter low subsets, considered to be myeloid progenitors, express the highest chymase fluorescence intensity in rat BM. Chymase activity and cellular expression was similar in both male and female rats. In conclusion, myeloid lineage cells, especially myeloid progenitors, have an extraordinary Ang II-producing activity by chymase in the BM.
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Affiliation(s)
| | | | | | | | | | - Hao Wang
- Department of Anesthesiology
- Department of Internal Medicine-Molecular Medicine
| | - Leanne Groban
- Department of Anesthesiology
- Department of Internal Medicine-Molecular Medicine
| | - Louis J. Dell’Italia
- Department of Medicine, Division of Cardiovascular Disease, University of Alabama at Birmingham (UAB), Birmingham, Alabama
- Department of Veterans Affairs Medical Center, Birmingham, AL
| | - Carlos M. Ferrario
- Department of Surgery
- Department of Physiology-Pharmacology, Wake Forest School of Medicine, Winston-Salem, NC
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Canfrán-Duque A, Rotllan N, Zhang X, Fernández-Fuertes M, Ramírez-Hidalgo C, Araldi E, Daimiel L, Busto R, Fernández-Hernando C, Suárez Y. Macrophage deficiency of miR-21 promotes apoptosis, plaque necrosis, and vascular inflammation during atherogenesis. EMBO Mol Med 2018; 9:1244-1262. [PMID: 28674080 PMCID: PMC5582411 DOI: 10.15252/emmm.201607492] [Citation(s) in RCA: 140] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Atherosclerosis, the major cause of cardiovascular disease, is a chronic inflammatory disease characterized by the accumulation of lipids and inflammatory cells in the artery wall. Aberrant expression of microRNAs has been implicated in the pathophysiological processes underlying the progression of atherosclerosis. Here, we define the contribution of miR‐21 in hematopoietic cells during atherogenesis. Interestingly, we found that miR‐21 is the most abundant miRNA in macrophages and its absence results in accelerated atherosclerosis, plaque necrosis, and vascular inflammation. miR‐21 expression influences foam cell formation, sensitivity to ER‐stress‐induced apoptosis, and phagocytic clearance capacity. Mechanistically, we discovered that the absence of miR‐21 in macrophages increases the expression of the miR‐21 target gene, MKK3, promoting the induction of p38‐CHOP and JNK signaling. Both pathways enhance macrophage apoptosis and promote the post‐translational degradation of ABCG1, a transporter that regulates cholesterol efflux in macrophages. Altogether, these findings reveal a major role for hematopoietic miR‐21 in atherogenesis.
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Affiliation(s)
- Alberto Canfrán-Duque
- Vascular Biology and Therapeutics Program, Integrative Cell Signaling and Neurobiology of Metabolism Program and the Departments of Comparative Medicine and Pathology, Yale University School of Medicine, New Haven, CT, USA
| | - Noemi Rotllan
- Vascular Biology and Therapeutics Program, Integrative Cell Signaling and Neurobiology of Metabolism Program and the Departments of Comparative Medicine and Pathology, Yale University School of Medicine, New Haven, CT, USA
| | - Xinbo Zhang
- Vascular Biology and Therapeutics Program, Integrative Cell Signaling and Neurobiology of Metabolism Program and the Departments of Comparative Medicine and Pathology, Yale University School of Medicine, New Haven, CT, USA
| | - Marta Fernández-Fuertes
- Vascular Biology and Therapeutics Program, Integrative Cell Signaling and Neurobiology of Metabolism Program and the Departments of Comparative Medicine and Pathology, Yale University School of Medicine, New Haven, CT, USA
| | - Cristina Ramírez-Hidalgo
- Vascular Biology and Therapeutics Program, Integrative Cell Signaling and Neurobiology of Metabolism Program and the Departments of Comparative Medicine and Pathology, Yale University School of Medicine, New Haven, CT, USA
| | - Elisa Araldi
- Vascular Biology and Therapeutics Program, Integrative Cell Signaling and Neurobiology of Metabolism Program and the Departments of Comparative Medicine and Pathology, Yale University School of Medicine, New Haven, CT, USA
| | - Lidia Daimiel
- Vascular Biology and Therapeutics Program, Integrative Cell Signaling and Neurobiology of Metabolism Program and the Departments of Comparative Medicine and Pathology, Yale University School of Medicine, New Haven, CT, USA
| | - Rebeca Busto
- Servicio de Bioquímica-Investigación, Hospital Universitario Ramón y Cajal de Investigación Sanitaria (IRyCIS), Madrid, Spain.,Centro de Investigación Biomédica en Red Fisiopatología de la Obesidad y Nutrición, Madrid, Spain
| | - Carlos Fernández-Hernando
- Vascular Biology and Therapeutics Program, Integrative Cell Signaling and Neurobiology of Metabolism Program and the Departments of Comparative Medicine and Pathology, Yale University School of Medicine, New Haven, CT, USA
| | - Yajaira Suárez
- Vascular Biology and Therapeutics Program, Integrative Cell Signaling and Neurobiology of Metabolism Program and the Departments of Comparative Medicine and Pathology, Yale University School of Medicine, New Haven, CT, USA
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Lee RH, Vazquez G. Reduced size and macrophage content of advanced atherosclerotic lesions in mice with bone marrow specific deficiency of alpha 7 nicotinic acetylcholine receptor. PLoS One 2015; 10:e0124584. [PMID: 25826262 PMCID: PMC4380454 DOI: 10.1371/journal.pone.0124584] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Accepted: 03/10/2015] [Indexed: 01/10/2023] Open
Abstract
In macrophages the α7 nicotinic acetylcholine receptor (α7nAChR) modulates production of inflammatory cytokines, cholesterol accumulation and lipoprotein uptake. Recently, our laboratory showed that selective stimulation of the α7nAChR protects macrophages from apoptosis, an effect that is absent in α7nAChR-deficient macrophages. All these observations are suggestive of a potential role of macrophage α7nAChR in atherosclerosis. Mouse models of the disease with bone marrow deletion of α7nAChR represent an attractive approach to address the in vivo relevance of these in vitro findings. However, recent studies that focused on the impact of hematopoietic deficiency of α7nAChR on early atherosclerotic lesions of low density lipoprotein receptor knockout (LDLRKO) mice, yielded controversial results. The question also remained whether macrophage α7nAChR modulates the characteristics of advanced lesions. Here we used LDLR knockout mice transplanted with bone marrow from wild-type or α7nAChR knockout animals to revisit the effect of hematopoietic deficiency of α7nAChR on early lesions and to examine, for the first time, its impact on advanced plaques. Aortic sinus atherosclerotic lesions were analyzed following 8 and 14 weeks on a high fat diet. Early lesions in mice with α7nAChR deficient bone marrow were not different from those in control animals. However, advanced lesions of mice with bone marrow deletion of α7nAChR exhibited reduction in size, macrophage content and cell proliferation. These studies are the first in examining the impact of hematopoietic deficiency of α7nAChR on the characteristics of advanced atherosclerotic lesions in a mouse model of the disease and provide novel evidence underscoring a potential pro-atherogenic role of macrophage α7nAChR.
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Affiliation(s)
- Robert H. Lee
- Department of Physiology and Pharmacology, Center for Diabetes and Endocrine Research, University of Toledo College of Medicine, Health Science Campus, 3000 Transverse Dr., Toledo, Ohio, 43614, United States of America
| | - Guillermo Vazquez
- Department of Physiology and Pharmacology, Center for Diabetes and Endocrine Research, University of Toledo College of Medicine, Health Science Campus, 3000 Transverse Dr., Toledo, Ohio, 43614, United States of America
- * E-mail:
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Genetic experimental preparations for studying atherosclerosis. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2014. [PMID: 24751424 DOI: 10.1016/b978-0-12-386930-2.00001-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register]
Abstract
Atherosclerosis is a pathological process with several inputs (biological, chemical, physiological, and others) interacting slowly over a lifetime leading to coronary artery disease, significant morbidity, and a limited lifespan. Over the past two decades, biologists have used experimental preparations from cells, animals, and man to understand the biology of atherosclerosis. Much has been discovered but our use of the standard gene-targeted experimental preparations is now nearing its limit. Better preparations to answer the remaining questions in the field of atherosclerosis biology are needed.
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