1
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Rao A, Bhat SA, Shibata T, Giani JF, Rader F, Bernstein KE, Khan Z. Diverse biological functions of the renin-angiotensin system. Med Res Rev 2024; 44:587-605. [PMID: 37947345 DOI: 10.1002/med.21996] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 08/30/2023] [Accepted: 10/29/2023] [Indexed: 11/12/2023]
Abstract
The renin-angiotensin system (RAS) has been widely known as a circulating endocrine system involved in the control of blood pressure. However, components of RAS have been found to be localized in rather unexpected sites in the body including the kidneys, brain, bone marrow, immune cells, and reproductive system. These discoveries have led to steady, growing evidence of the existence of independent tissue RAS specific to several parts of the body. It is important to understand how RAS regulates these systems for a variety of reasons: It gives a better overall picture of human physiology, helps to understand and mitigate the unintended consequences of RAS-inhibiting or activating drugs, and sets the stage for potential new therapies for a variety of ailments. This review fulfills the need for an updated overview of knowledge about local tissue RAS in several bodily systems, including their components, functions, and medical implications.
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Affiliation(s)
- Adithi Rao
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, California, USA
- Molecular, Cell and Developmental Biology, University of California Los Angeles, Los Angeles, California, USA
| | - Shabir A Bhat
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Tomohiro Shibata
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Jorge F Giani
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, California, USA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Florian Rader
- Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Kenneth E Bernstein
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, California, USA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Zakir Khan
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, California, USA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California, USA
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2
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Costa MM, Stilhano RS, Oliveira CR, Barbosa CMV, Pereira GJS, Paredes-Gamero EJ, Nakaie CR, Smaili SS, Bincoletto C. Angiotensin II modulates the murine hematopoietic stem cell and progenitors cocultured with stromal S17 cells. Cell Biol Int 2021; 45:1459-1467. [PMID: 33675269 DOI: 10.1002/cbin.11584] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 02/07/2021] [Accepted: 02/27/2021] [Indexed: 01/18/2023]
Abstract
Although the existence of the renin-angiotensin system (RAS) in the bone marrow is clear, the exact role of this system in hematopoiesis has not yet been fully characterized. Here the direct role of angiotensin II (AngII) in hematopoietic stem cells (HSCs), common myeloid progenitors (CMPs), granulocyte/monocyte progenitors (GMPs), and megakaryocytes/erythroid progenitors (MEPs), using a system of coculture with stromal S17 cells. Flow cytometry analysis showed that AngII increases the percentage of HSC and GMP, while reducing CMP with no effect on MEP. According to these data, AngII increased the total number of mature Gr-1+ /Mac-1+ cells without changes in Terr119+ cells. AngII does not induce cell death in the population of LSK cells. In these populations, treatment with AngII decreases the expression of Ki67+ protein with no changes in the Notch1 expression, suggesting a role for AngII on the quiescence of immature cells. In addition, exposure to AngII from murine bone marrow cells increased the number of CFU-GM and BFU-E in a clonogenic assay. In conclusion, our data showed that AngII is involved in the regulation of hematopoiesis with a special role in HSC, suggesting that AngII should be evaluated in coculture systems, especially in cases that require the expansion of these cells in vitro, still a significant challenge for therapeutic applications in humans.
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Affiliation(s)
- Maíra M Costa
- Departamento de Farmacologia, Escola Paulista de Medicina, Instituto Nacional de Farmacologia, Universidade Federal de São Paulo, São Paulo, São Paulo, Brazil
| | - Roberta S Stilhano
- Departamento de Biofísica, Centro de Terapia Celular e Molecular, Universidade Federal de São Paulo, São Paulo, São Paulo, Brazil
| | - Carlos R Oliveira
- Departamento de Farmacologia, Escola Paulista de Medicina, Instituto Nacional de Farmacologia, Universidade Federal de São Paulo, São Paulo, São Paulo, Brazil
| | - Chistiano M V Barbosa
- Departamento de Biofísica, Instituto Nacional de Farmacologia, Universidade Federal de São Paulo, São Paulo, São Paulo, Brazil
| | - Gustavo J S Pereira
- Departamento de Farmacologia, Escola Paulista de Medicina, Instituto Nacional de Farmacologia, Universidade Federal de São Paulo, São Paulo, São Paulo, Brazil
| | - Edgar J Paredes-Gamero
- Departamento de Bioquímica, Instituto Nacional de Farmacologia, Universidade Federal de São Paulo, São Paulo, São Paulo, Brazil.,Faculdade de Ciências Farmacêuticas, Alimentos e Nutrição, Universidade Federal de Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | - Clovis R Nakaie
- Departamento de Biofísica, Instituto Nacional de Farmacologia, Universidade Federal de São Paulo, São Paulo, São Paulo, Brazil.,Departamento de Bioquímica, Instituto Nacional de Farmacologia, Universidade Federal de São Paulo, São Paulo, São Paulo, Brazil
| | - Soraya S Smaili
- Departamento de Farmacologia, Escola Paulista de Medicina, Instituto Nacional de Farmacologia, Universidade Federal de São Paulo, São Paulo, São Paulo, Brazil
| | - Claudia Bincoletto
- Departamento de Farmacologia, Escola Paulista de Medicina, Instituto Nacional de Farmacologia, Universidade Federal de São Paulo, São Paulo, São Paulo, Brazil
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3
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Abstract
Obesity and obesity-related diseases like type 2 diabetes (T2D) are prominent global health issues; therefore, there is a need to better understand the mechanisms underlying these conditions. The onset of obesity is characterized by accumulation of proinflammatory cells, including Ly6chi monocytes (which differentiate into proinflammatory macrophages) and neutrophils, in metabolic tissues. This shift toward chronic, low-grade inflammation is an obese-state hallmark and highly linked to metabolic disorders and other obesity comorbidities. The mechanisms that induce and maintain increased inflammatory myelopoiesis are of great interest, with a recent focus on how obesity affects more primitive hematopoietic cells. The hematopoietic system is constantly replenished by proper regulation of hematopoietic stem and progenitor (HSPC) pools in the BM. While early research suggests that chronic obesity promotes expansion of myeloid-skewed HSPCs, the involvement of the hematopoietic stem cell (HSC) niche in regulating obesity-induced myelopoiesis remains undefined. In this review, we explore the role of the multicellular HSC niche in hematopoiesis and inflammation, and the potential contribution of this niche to the hematopoietic response to obesity. This review further aims to summarize the potential HSC niche involvement as a target of obesity-induced inflammation and a driver of obesity-induced myelopoiesis.
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4
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Julien E, Biasch K, El Omar R, Freund JN, Gachet C, Lanza F, Tavian M. Renin-angiotensin system is involved in embryonic emergence of hematopoietic stem/progenitor cells. Stem Cells 2021; 39:636-649. [PMID: 33480126 DOI: 10.1002/stem.3339] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 12/08/2020] [Accepted: 01/06/2021] [Indexed: 12/14/2022]
Abstract
Angiotensin-converting enzyme (ACE), a key element of the renin-angiotensin system (RAS), has recently been identified as a new marker of both adult and embryonic human hematopoietic stem/progenitor cells (HSPCs). However, whether a full renin-angiotensin pathway is locally present during the hematopoietic emergence is still an open question. In the present study, we show that this enzyme is expressed by hematopoietic progenitors in the developing mouse embryo. Furthermore, ACE and the other elements of RAS-namely angiotensinogen, renin, and angiotensin II type 1 (AT1) and type 2 (AT2) receptors-are expressed in the paraaortic splanchnopleura (P-Sp) and in its derivative, the aorta-gonad-mesonephros region, both in human and mouse embryos. Their localization is compatible with the existence of a local autocrine and/or paracrine RAS in these hemogenic sites. in vitro perturbation of the RAS by administration of a specific AT1 receptor antagonist inhibits almost totally the generation of blood CD45-positive cells from dissected P-Sp, implying that angiotensin II signaling is necessary for the emergence of hematopoietic cells. Conversely, addition of exogenous angiotensin II peptide stimulates hematopoiesis in culture, with an increase in the number of immature c-Kit+ CD41+ CD31+ CD45+ hematopoietic progenitors, compared to the control. These results highlight a novel role of local-RAS during embryogenesis, suggesting that angiotensin II, via activation of AT1 receptor, promotes the emergence of undifferentiated hematopoietic progenitors.
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Affiliation(s)
- Emmanuelle Julien
- University of Strasbourg, INSERM, EFS Grand-Est, BPPS UMR-S1255, Strasbourg, France
| | - Katia Biasch
- University of Strasbourg, INSERM, EFS Grand-Est, BPPS UMR-S1255, Strasbourg, France.,University of Strasbourg, INSERM, IRFAC/UMR-S1113, ITI InnoVec, FHU ARRIMAGE, FMTS, Strasbourg, France
| | - Reine El Omar
- University of Strasbourg, INSERM, EFS Grand-Est, BPPS UMR-S1255, Strasbourg, France.,IMoPA, UMR7365 CNRS-University of Lorraine, Vandœuvre Les Nancy, France
| | - Jean-Noël Freund
- University of Strasbourg, INSERM, IRFAC/UMR-S1113, ITI InnoVec, FHU ARRIMAGE, FMTS, Strasbourg, France
| | - Christian Gachet
- University of Strasbourg, INSERM, EFS Grand-Est, BPPS UMR-S1255, Strasbourg, France
| | - François Lanza
- University of Strasbourg, INSERM, EFS Grand-Est, BPPS UMR-S1255, Strasbourg, France
| | - Manuela Tavian
- University of Strasbourg, INSERM, EFS Grand-Est, BPPS UMR-S1255, Strasbourg, France.,University of Strasbourg, INSERM, IRFAC/UMR-S1113, ITI InnoVec, FHU ARRIMAGE, FMTS, Strasbourg, France
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5
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Fadini GP, Mehta A, Dhindsa DS, Bonora BM, Sreejit G, Nagareddy P, Quyyumi AA. Circulating stem cells and cardiovascular outcomes: from basic science to the clinic. Eur Heart J 2020; 41:4271-4282. [PMID: 31891403 PMCID: PMC7825095 DOI: 10.1093/eurheartj/ehz923] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Revised: 10/19/2019] [Accepted: 12/05/2019] [Indexed: 02/06/2023] Open
Abstract
The cardiovascular and haematopoietic systems have fundamental inter-relationships during development, as well as in health and disease of the adult organism. Although haematopoietic stem cells (HSCs) emerge from a specialized haemogenic endothelium in the embryo, persistence of haemangioblasts in adulthood is debated. Rather, the vast majority of circulating stem cells (CSCs) is composed of bone marrow-derived HSCs and the downstream haematopoietic stem/progenitors (HSPCs). A fraction of these cells, known as endothelial progenitor cells (EPCs), has endothelial specification and vascular tropism. In general, the levels of HSCs, HSPCs, and EPCs are considered indicative of the endogenous regenerative capacity of the organism as a whole and, particularly, of the cardiovascular system. In the last two decades, the research on CSCs has focused on their physiologic role in tissue/organ homoeostasis, their potential application in cell therapies, and their use as clinical biomarkers. In this review, we provide background information on the biology of CSCs and discuss in detail the clinical implications of changing CSC levels in patients with cardiovascular risk factors or established cardiovascular disease. Of particular interest is the mounting evidence available in the literature on the close relationships between reduced levels of CSCs and adverse cardiovascular outcomes in different cohorts of patients. We also discuss potential mechanisms that explain this association. Beyond CSCs' ability to participate in cardiovascular repair, levels of CSCs need to be interpreted in the context of the broader connections between haematopoiesis and cardiovascular function, including the role of clonal haematopoiesis and inflammatory myelopoiesis.
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Affiliation(s)
- Gian Paolo Fadini
- Department of Medicine, University of Padova, Via Giustiniani 2, 35128 Padova, Italy
| | - Anurag Mehta
- Division of Cardiology, Department of Medicine, Emory Clinical Cardiovascular Research Institute, Emory University School of Medicine, 201 Dowman Drive, Atlanta, GA 30322, USA
| | - Devinder Singh Dhindsa
- Division of Cardiology, Department of Medicine, Emory Clinical Cardiovascular Research Institute, Emory University School of Medicine, 201 Dowman Drive, Atlanta, GA 30322, USA
| | | | - Gopalkrishna Sreejit
- Division of Cardiac Surgery, Department of Surgery, Ohio State University, Columbus, OH 43210, USA
| | - Prabhakara Nagareddy
- Division of Cardiac Surgery, Department of Surgery, Ohio State University, Columbus, OH 43210, USA
| | - Arshed Ali Quyyumi
- Division of Cardiology, Department of Medicine, Emory Clinical Cardiovascular Research Institute, Emory University School of Medicine, 201 Dowman Drive, Atlanta, GA 30322, USA
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6
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Wada N, Yamada H, Motoyama S, Saburi M, Sugimoto T, Kubota H, Miyawaki D, Wakana N, Kami D, Ogata T, Matoba S. Maternal high-fat diet exaggerates diet-induced insulin resistance in adult offspring by enhancing inflammasome activation through noncanonical pathway of caspase-11. Mol Metab 2020; 37:100988. [PMID: 32272237 PMCID: PMC7210595 DOI: 10.1016/j.molmet.2020.100988] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 03/22/2020] [Accepted: 03/31/2020] [Indexed: 02/06/2023] Open
Abstract
Objective Maternal high-fat diet (HFD) has been shown to promote the development of insulin resistance (IR) in adult offspring; however, the underlying mechanisms remain unclear. Methods Eight-week-old female wild-type mice (C57BL/6) were fed either an HFD or a normal diet (ND), one week prior to mating, and the diet was continued throughout gestation and lactation. Eight-week-old male offspring of both groups were fed an HFD for 8 weeks. Results Offspring of HFD-fed dams (O-HFD) exhibited significantly impaired insulin sensitivity compared with the offspring of ND-fed dams (O-ND). The adipocyte size of the eWAT increased significantly in O-HFD and was accompanied by abundant crown-like structures (CLSs), as well as a higher concentration of interleukin 1β (IL-1β) in the eWAT. Treatment with an inflammasome inhibitor, MCC950, completely abrogated the enhanced IR in O-HFD. However, ex vivo caspase-1 activity in eWAT revealed no difference between the two groups. In contrast, noncanonical inflammasome activation of caspase-11 was significantly augmented in O-HFD compared with O-ND, suggesting that membrane pore formation, but not cleavage of pro-IL-1β by caspase-1, is augmented in O-HFD. To examine the membrane pore formation, we performed metabolic activation of bone marrow-derived macrophages (BMDMs). The percentage of pore formation assessed by ethidium bromide staining was significantly higher in BMDMs of O-HFD, accompanied by an enhanced active caspase-11 expression. Consistently, the concentration of IL-1β in culture supernatants was significantly higher in the BMDMs from O-HFD than those from O-ND. Conclusions These findings demonstrate that maternal HFD exaggerates diet-induced IR in adult offspring by enhancing noncanonical caspase-11-mediated inflammasome activation. Maternal HFD increases the vulnerability to HFD-induced IR in adult offspring. Maternal HFD augments inflammasome activation in eWAT in adult offspring. Treatment with an inflammasome inhibitor abrogates IR in offspring of HFD-fed dam. Maternal HFD augments the noncanonical inflammasome activation pathway of caspase-11. Maternal HFD augments IL-1β release from BMDMs by enhancing membrane pore formation.
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Affiliation(s)
- Naotoshi Wada
- Department of Cardiovascular Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hiroyuki Yamada
- Department of Cardiovascular Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan.
| | - Shinichiro Motoyama
- Department of Cardiovascular Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Makoto Saburi
- Department of Cardiovascular Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Takeshi Sugimoto
- Department of Cardiovascular Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hiroshi Kubota
- Department of Cardiovascular Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Daisuke Miyawaki
- Department of Cardiovascular Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Noriyuki Wakana
- Department of Cardiovascular Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Daisuke Kami
- Department of Regenerative Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Takehiro Ogata
- Department of Pathology and Cell Regulation, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Satoaki Matoba
- Department of Cardiovascular Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
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7
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Shimoura CG, Mathis KW. When Memory Does Not Serve You Well. Circ Res 2020; 126:722-724. [PMID: 32163345 DOI: 10.1161/circresaha.120.316650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Caroline G Shimoura
- From the Department of Physiology and Anatomy, University of North Texas Health Science Center, Fort Worth
| | - Keisa W Mathis
- From the Department of Physiology and Anatomy, University of North Texas Health Science Center, Fort Worth
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8
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Al-Sharea A, Lee MKS, Purton LE, Hawkins ED, Murphy AJ. The haematopoietic stem cell niche: a new player in cardiovascular disease? Cardiovasc Res 2020; 115:277-291. [PMID: 30590405 DOI: 10.1093/cvr/cvy308] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 12/17/2018] [Indexed: 02/06/2023] Open
Abstract
Haematopoiesis, the process of blood production, can be altered during the initiation or progression of many diseases. Cardiovascular disease (CVD) has been shown to be heavily influenced by changes to the haematopoietic system, including the types and abundance of immune cells produced. It is now well established that innate immune cells are increased in people with CVD, and the mechanisms contributing to this can be vastly different depending on the risk factors or comorbidities present. Many of these changes begin at the level of the haematopoietic stem and progenitor cells (HSPCs) that reside in the bone marrow (BM). In general, the HSPCs and downstream myeloid progenitors are expanded via increased proliferation in the setting of atherosclerotic CVD. However, HSPCs can also be encouraged to leave the BM and colonise extramedullary sites (i.e. the spleen). Within the BM, HSPCs reside in specialized microenvironments, often referred to as a niche. To date in depth studies assessing the damage or dysregulation that occurs in the BM niche in varying CVDs are scarce. In this review, we provide a general overview of the complex components and interactions within the BM niche and how they influence the function of HSPCs. Additionally, we discuss the main findings regarding changes in the HSPC niche that influence the progression of CVD. We hypothesize that understanding the influence of the BM niche in CVD will aid in delineating new pathways for therapeutic interventions.
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Affiliation(s)
- Annas Al-Sharea
- Division of Immunometabolism, Haematopoiesis and Leukocyte Biology, Baker Heart & Diabetes Institute, 75 Commercial Road, Melbourne, VIC, Australia.,Department of Immunology, Monash University, Melbourne, Australia
| | - Man Kit Sam Lee
- Division of Immunometabolism, Haematopoiesis and Leukocyte Biology, Baker Heart & Diabetes Institute, 75 Commercial Road, Melbourne, VIC, Australia.,Department of Immunology, Monash University, Melbourne, Australia
| | | | - Edwin D Hawkins
- Division of Immunology, Walter and Eliza Hall Institute of Medical Research, Melbourne, Australia
| | - Andrew J Murphy
- Division of Immunometabolism, Haematopoiesis and Leukocyte Biology, Baker Heart & Diabetes Institute, 75 Commercial Road, Melbourne, VIC, Australia.,Department of Immunology, Monash University, Melbourne, Australia
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9
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Chen T, Wu Y, Gu W, Xu Q. Response of vascular mesenchymal stem/progenitor cells to hyperlipidemia. Cell Mol Life Sci 2018; 75:4079-4091. [PMID: 29946805 PMCID: PMC11105685 DOI: 10.1007/s00018-018-2859-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Revised: 06/14/2018] [Accepted: 06/20/2018] [Indexed: 12/29/2022]
Abstract
Hyperlipidemia is a risk factor for atherosclerosis that is characterized by lipid accumulation, inflammatory cell infiltration, and smooth muscle cell proliferation. It is well known that hyperlipidemia is a stimulator for endothelial dysfunction and smooth muscle cell migration during vascular disease development. Recently, it was found that vessel wall contains a variable number of mesenchymal stem cells (MSCs) that are quiescent in physiological conditions, but can be activated by a variety of stimuli, e.g., increased lipid level or hyperlipidemia. Vascular MSCs displayed characteristics of stem cells which can differentiate into several types of cells, e.g., smooth muscle cells, adipocytic, chondrocytic, and osteocytic lineages. In vitro, lipid loading can induce MSC migration and chemokines secretion. After MSC migration into the intima, they play an essential role in inflammatory response and cell accumulation during the initiation and progression of atherosclerosis. In addition, MSC transplantation has been explored as a therapeutic approach to treat atherosclerosis in animal models. In this review, we aim to summarize current progress in characterizing the identity of vascular MSCs and to discuss the mechanisms involved in the response of vascular stem/progenitor cells to lipid loading, as well as to explore therapeutic strategies for vascular diseases and shed new light on regenerative medicine.
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Affiliation(s)
- Ting Chen
- Department of Cardiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang, China
| | - Yutao Wu
- Department of Cardiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang, China
| | - Wenduo Gu
- School of Cardiovascular Medicine and Sciences, King's BHF Centre, 125 Coldharbour Lane, London, SE5 9NU, UK
| | - Qingbo Xu
- Department of Cardiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang, China.
- School of Cardiovascular Medicine and Sciences, King's BHF Centre, 125 Coldharbour Lane, London, SE5 9NU, UK.
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10
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Kidney Androgen-Regulated Protein (KAP) Transgenic Mice Are Protected Against High-Fat Diet Induced Metabolic Syndrome. Sci Rep 2017; 7:16102. [PMID: 29170528 PMCID: PMC5701062 DOI: 10.1038/s41598-017-16487-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 11/14/2017] [Indexed: 12/18/2022] Open
Abstract
Metabolic Syndrome (MS) is reaching epidemic proportions with significant social and economical burden worldwide. Since the molecular basis of MS remains poorly defined, we investigated the impact of KAP, a kidney specific androgen-regulated gene, in the development of high fat-diet (hfd)-induced MS. Tg mice overexpressing KAP specifically in proximal tubule cells of the kidney exhibited reduced body weight and lower liver and adipose tissue weight compared to control littermates when fed a hfd. KAP Tg mice showed diminished adipocyte hypertrophy and reduced hepatic steatosis, significantly correlating with expression of relevant molecular markers and lower lipid content in liver. KAP transgenic were protected from hfd-induced insulin resistance, increased blood pressure and exhibited lower IL-6 serum levels and diminished expression of inflammatory markers in the adipose. Moreover, KAP was localized in the secretory pathway of proximal tubule cells and it is released to the extracellular media, preventing IL-6 induction and STAT-3 activation upon TNFα stimulation. We conclude that KAP, which might act as a hormone-like product in extra-renal tissues, protects Tg mice against hfd-induced MS by preventing inflammatory related events that are mediated, in part, through the IL-6 pathway.
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11
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Han T, Yang CS, Chang KY, Zhang D, Imam FB, Rana TM. Identification of novel genes and networks governing hematopoietic stem cell development. EMBO Rep 2016; 17:1814-1828. [PMID: 27797851 PMCID: PMC5167341 DOI: 10.15252/embr.201642395] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 09/13/2016] [Accepted: 09/30/2016] [Indexed: 01/06/2023] Open
Abstract
Hematopoietic stem cells (HSCs) are capable of giving rise to all blood cell lineages throughout adulthood, and the generation of engraftable HSCs from human pluripotent stem cells is a major goal for regenerative medicine. Here, we describe a functional genome‐wide RNAi screen to identify genes required for the differentiation of embryonic stem cell (ESC) into hematopoietic stem/progenitor cells (HSPCs) in vitro. We report the discovery of novel genes important for the endothelial‐to‐hematopoietic transition and subsequently for HSPC specification. High‐throughput sequencing and bioinformatic analyses identified twelve groups of genes, including a set of 351 novel genes required for HSPC specification. As in vivo proof of concept, four of these genes, Ap2a1, Mettl22, Lrsam1, and Hal, are selected for validation, confirmed to be essential for HSPC development in zebrafish and for maintenance of human HSCs. Taken together, our results not only identify a number of novel regulatory genes and pathways essential for HSPC development but also serve as valuable resource for directed differentiation of therapy grade HSPCs using human pluripotent stem cells.
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Affiliation(s)
- Tianxu Han
- Department of Pediatrics, University of California San Diego School of Medicine, La Jolla, CA, USA
| | - Chao-Shun Yang
- Department of Pediatrics, University of California San Diego School of Medicine, La Jolla, CA, USA
| | - Kung-Yen Chang
- Department of Pediatrics, University of California San Diego School of Medicine, La Jolla, CA, USA
| | - Danhua Zhang
- Department of Pediatrics, University of California San Diego School of Medicine, La Jolla, CA, USA
| | - Farhad B Imam
- Department of Pediatrics, University of California San Diego School of Medicine, La Jolla, CA, USA.,Division of Neonatology, Rady Children's Hospital-San Diego, San Diego, CA, USA
| | - Tariq M Rana
- Department of Pediatrics, University of California San Diego School of Medicine, La Jolla, CA, USA .,Institute for Genomic Medicine, University of California San Diego, La Jolla, CA, USA
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12
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Kim S, Zingler M, Harrison JK, Scott EW, Cogle CR, Luo D, Raizada MK. Angiotensin II Regulation of Proliferation, Differentiation, and Engraftment of Hematopoietic Stem Cells. Hypertension 2016; 67:574-84. [PMID: 26781279 DOI: 10.1161/hypertensionaha.115.06474] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Accepted: 12/22/2015] [Indexed: 12/28/2022]
Abstract
Emerging evidence indicates that differentiation and mobilization of hematopoietic cell are critical in the development and establishment of hypertension and hypertension-linked vascular pathophysiology. This, coupled with the intimate involvement of the hyperactive renin-angiotensin system in hypertension, led us to investigate the hypothesis that chronic angiotensin II (Ang II) infusion affects hematopoietic stem cell (HSC) regulation at the level of the bone marrow. Ang II infusion resulted in increases in hematopoietic stem/progenitor cells (83%) and long-term HSC (207%) in the bone marrow. Interestingly, increases of HSCs and long-term HSCs were more pronounced in the spleen (228% and 1117%, respectively). Furthermore, we observed higher expression of C-C chemokine receptor type 2 in these HSCs, indicating there was increased myeloid differentiation in Ang II-infused mice. This was associated with accumulation of C-C chemokine receptor type 2(+) proinflammatory monocytes in the spleen. In contrast, decreased engraftment efficiency of GFP(+) HSC was observed after Ang II infusion. Time-lapse in vivo imaging and in vitro Ang II pretreatment demonstrated that Ang II induces untimely proliferation and differentiation of the donor HSC resulting in diminished HSC engraftment and bone marrow reconstitution. We conclude that (1) chronic Ang II infusion regulates HSC proliferation, mediated by angiotensin receptor type 1a, (2) Ang II accelerates HSC to myeloid differentiation resulting in accumulation of C-C chemokine receptor type 2(+) HSCs and inflammatory monocytes in the spleen, and (3) Ang II impairs homing and reconstitution potentials of the donor HSCs. These observations highlight the important regulatory roles of Ang II on HSC proliferation, differentiation, and engraftment.
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Affiliation(s)
- Seungbum Kim
- From the Departments of Physiology and Functional Genomics (S.K., M.Z., M.K.R.), Pharmacology and Therapeutics (J.K.H., D.L.), Molecular Genetics and Microbiology (E.W.S.), and Medicine (C.R.C.), College of Medicine, University of Florida, Gainesville
| | - Michael Zingler
- From the Departments of Physiology and Functional Genomics (S.K., M.Z., M.K.R.), Pharmacology and Therapeutics (J.K.H., D.L.), Molecular Genetics and Microbiology (E.W.S.), and Medicine (C.R.C.), College of Medicine, University of Florida, Gainesville
| | - Jeffrey K Harrison
- From the Departments of Physiology and Functional Genomics (S.K., M.Z., M.K.R.), Pharmacology and Therapeutics (J.K.H., D.L.), Molecular Genetics and Microbiology (E.W.S.), and Medicine (C.R.C.), College of Medicine, University of Florida, Gainesville
| | - Edward W Scott
- From the Departments of Physiology and Functional Genomics (S.K., M.Z., M.K.R.), Pharmacology and Therapeutics (J.K.H., D.L.), Molecular Genetics and Microbiology (E.W.S.), and Medicine (C.R.C.), College of Medicine, University of Florida, Gainesville
| | - Christopher R Cogle
- From the Departments of Physiology and Functional Genomics (S.K., M.Z., M.K.R.), Pharmacology and Therapeutics (J.K.H., D.L.), Molecular Genetics and Microbiology (E.W.S.), and Medicine (C.R.C.), College of Medicine, University of Florida, Gainesville
| | - Defang Luo
- From the Departments of Physiology and Functional Genomics (S.K., M.Z., M.K.R.), Pharmacology and Therapeutics (J.K.H., D.L.), Molecular Genetics and Microbiology (E.W.S.), and Medicine (C.R.C.), College of Medicine, University of Florida, Gainesville
| | - Mohan K Raizada
- From the Departments of Physiology and Functional Genomics (S.K., M.Z., M.K.R.), Pharmacology and Therapeutics (J.K.H., D.L.), Molecular Genetics and Microbiology (E.W.S.), and Medicine (C.R.C.), College of Medicine, University of Florida, Gainesville.
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13
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Venosa A, Malaviya R, Gow AJ, Hall L, Laskin JD, Laskin DL. Protective role of spleen-derived macrophages in lung inflammation, injury, and fibrosis induced by nitrogen mustard. Am J Physiol Lung Cell Mol Physiol 2015; 309:L1487-98. [PMID: 26475734 DOI: 10.1152/ajplung.00276.2015] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 10/09/2015] [Indexed: 12/19/2022] Open
Abstract
Nitrogen mustard (NM) is a vesicant that causes lung injury and fibrosis, accompanied by a persistent macrophage inflammatory response. In these studies we analyzed the spleen as a source of these cells. Splenectomized (SPX) and sham control rats were treated intratracheally with NM (0.125 mg/kg) or PBS control. Macrophage responses were analyzed 1-7 days later. Splenectomy resulted in an increase in lung macrophages expressing CCR2, but a decrease in ATR-1α(+) cells, receptors important in bone marrow and spleen monocyte trafficking, respectively. Splenectomy was also associated with an increase in proinflammatory M1 (iNOS(+), CD11b(+)CD43(+)) macrophages in lungs of NM-treated rats, as well as greater upregulation of iNOS and COX-2 mRNA expression. Conversely, a decrease in CD11b(+)CD43(-) M2 macrophages was observed in SPX rats, with no changes in CD68(+), CD163(+), CD206(+), or YM-1(+) M2 macrophages, suggesting distinct origins of M2 subpopulations responding to NM. Macrophage expression of M2 genes including IL-10, ApoE, PTX-2, PTX-3, 5-HT2α, and 5-HT7 was also reduced in NM-treated SPX rats compared with shams, indicating impaired M2 activity. Changes in lung macrophages responding to NM as a consequence of splenectomy were correlated with exacerbated tissue injury and more rapid fibrogenesis. These data demonstrate that the spleen is a source of a subset of M2 macrophages with anti-inflammatory activity; moreover, in their absence, proinflammatory/cytotoxic M1 macrophages predominate in the lung, resulting in heightened pathology. Understanding the origin of macrophages and characterizing their phenotype after vesicant exposure may lead to more targeted therapeutics aimed at reducing toxicity and disease pathogenesis.
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Affiliation(s)
- Alessandro Venosa
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Piscataway, New Jersey
| | - Rama Malaviya
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Piscataway, New Jersey
| | - Andrew J Gow
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Piscataway, New Jersey
| | - Leroy Hall
- Drug Safety Sciences, Johnson & Johnson, Raritan, New Jersey; and
| | - Jeffrey D Laskin
- Department of Environmental and Occupational Health, School of Public Health, Rutgers University, Piscataway, New Jersey
| | - Debra L Laskin
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Piscataway, New Jersey;
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Abstract
The vasculature plays an indispensible role in organ development and maintenance of tissue homeostasis, such that disturbances to it impact greatly on developmental and postnatal health. Although cell turnover in healthy blood vessels is low, it increases considerably under pathological conditions. The principle sources for this phenomenon have long been considered to be the recruitment of cells from the peripheral circulation and the re-entry of mature cells in the vessel wall back into cell cycle. However, recent discoveries have also uncovered the presence of a range of multipotent and lineage-restricted progenitor cells in the mural layers of postnatal blood vessels, possessing high proliferative capacity and potential to generate endothelial, smooth muscle, hematopoietic or mesenchymal cell progeny. In particular, the tunica adventitia has emerged as a progenitor-rich compartment with niche-like characteristics that support and regulate vascular wall progenitor cells. Preliminary data indicate the involvement of some of these vascular wall progenitor cells in vascular disease states, adding weight to the notion that the adventitia is integral to vascular wall pathogenesis, and raising potential implications for clinical therapies. This review discusses the current body of evidence for the existence of vascular wall progenitor cell subpopulations from development to adulthood and addresses the gains made and significant challenges that lie ahead in trying to accurately delineate their identities, origins, regulatory pathways, and relevance to normal vascular structure and function, as well as disease.
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Affiliation(s)
- Peter J Psaltis
- From the Department of Medicine, University of Adelaide and Heart Health Theme, South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia (P.J.P.); Monash Cardiovascular Research Centre, Monash University, Clayton, Victoria, Australia (P.J.P.); and Department of Internal Medicine, University of Kansas School of Medicine (R.D.S.)
| | - Robert D Simari
- From the Department of Medicine, University of Adelaide and Heart Health Theme, South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia (P.J.P.); Monash Cardiovascular Research Centre, Monash University, Clayton, Victoria, Australia (P.J.P.); and Department of Internal Medicine, University of Kansas School of Medicine (R.D.S.).
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15
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Chen S, Grover M, Sibai T, Black J, Rianon N, Rajagopal A, Munivez E, Bertin T, Dawson B, Chen Y, Jiang MM, Lee B, Yang T, Bae Y. Losartan increases bone mass and accelerates chondrocyte hypertrophy in developing skeleton. Mol Genet Metab 2015; 115:53-60. [PMID: 25779879 PMCID: PMC4426054 DOI: 10.1016/j.ymgme.2015.02.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 02/20/2015] [Accepted: 02/21/2015] [Indexed: 10/23/2022]
Abstract
Angiotensin receptor blockers (ARBs) are a group of anti-hypertensive drugs that are widely used to treat pediatric hypertension. Recent application of ARBs to treat diseases such as Marfan syndrome or Alport syndrome has shown positive outcomes in animal and human studies, suggesting a broader therapeutic potential for this class of drugs. Multiple studies have reported a benefit of ARBs on adult bone homeostasis; however, its effect on the growing skeleton in children is unknown. We investigated the effect of Losartan, an ARB, in regulating bone mass and cartilage during development in mice. Wild type mice were treated with Losartan from birth until 6 weeks of age, after which bones were collected for microCT and histomorphometric analyses. Losartan increased trabecular bone volume vs. tissue volume (a 98% increase) and cortical thickness (a 9% increase) in 6-weeks old wild type mice. The bone changes were attributed to decreased osteoclastogenesis as demonstrated by reduced osteoclast number per bone surface in vivo and suppressed osteoclast differentiation in vitro. At the molecular level, Angiotensin II-induced ERK1/2 phosphorylation in RAW cells was attenuated by Losartan. Similarly, RANKL-induced ERK1/2 phosphorylation was suppressed by Losartan, suggesting a convergence of RANKL and angiotensin signaling at the level of ERK1/2 regulation. To assess the effect of Losartan on cartilage development, we examined the cartilage phenotype of wild type mice treated with Losartan in utero from conception to 1 day of age. Growth plates of these mice showed an elongated hypertrophic chondrocyte zone and increased Col10a1 expression level, with minimal changes in chondrocyte proliferation. Altogether, inhibition of the angiotensin pathway by Losartan increases bone mass and accelerates chondrocyte hypertrophy in growth plate during skeletal development.
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Affiliation(s)
- Shan Chen
- Department of Biostatistics, University of Texas Health Science Center at Houston School of Public Health
| | - Monica Grover
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Tarek Sibai
- Boston University School of Medicine Orthopedic Surgery, Boston University, Boston, MA, USA
| | - Jennifer Black
- Department of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville, TN, USA
| | - Nahid Rianon
- Department of Internal Medicine, University of Texas Medical School at Houston, TX, USA
| | - Abbhirami Rajagopal
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Elda Munivez
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Terry Bertin
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Brian Dawson
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Yuqing Chen
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Ming-Ming Jiang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Brendan Lee
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Tao Yang
- Laboratory of Skeletal Biology, Center for Skeletal Disease and Tumor Metastasis, Van Andel Research Institute, Grand Rapids, MI, USA
| | - Yangjin Bae
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
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16
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Scavenger receptor class A member 5 (SCARA5) and suprabasin (SBSN) are hub genes of coexpression network modules associated with peripheral vein graft patency. J Vasc Surg 2015; 64:202-209.e6. [PMID: 25935274 DOI: 10.1016/j.jvs.2014.12.052] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Accepted: 12/18/2014] [Indexed: 12/16/2022]
Abstract
OBJECTIVE Approximately 30% of autogenous vein grafts develop luminal narrowing and fail because of intimal hyperplasia or negative remodeling. We previously found that vein graft cells from patients who later develop stenosis proliferate more in vitro in response to growth factors than cells from patients who maintain patent grafts. To discover novel determinants of vein graft outcome, we have analyzed gene expression profiles of these cells using a systems biology approach to cluster the genes into modules by their coexpression patterns and to correlate the results with growth data from our prior study and with new studies of migration and matrix remodeling. METHODS RNA from 4-hour serum- or platelet-derived growth factor (PDGF)-BB-stimulated human saphenous vein cells obtained from the outer vein wall (20 cell lines) was used for microarray analysis of gene expression, followed by weighted gene coexpression network analysis. Cell migration in microchemotaxis chambers in response to PDGF-BB and cell-mediated collagen gel contraction in response to serum were also determined. Gene function was determined using short-interfering RNA to inhibit gene expression before subjecting cells to growth or collagen gel contraction assays. These cells were derived from samples of the vein grafts obtained at surgery, and the long-term fate of these bypass grafts was known. RESULTS Neither migration nor cell-mediated collagen gel contraction showed a correlation with graft outcome. Although 1188 and 1340 genes were differentially expressed in response to treatment with serum and PDGF, respectively, no single gene was differentially expressed in cells isolated from patients whose grafts stenosed compared with those that remained patent. Network analysis revealed four unique groups of genes, which we term modules, associated with PDGF responses, and 20 unique modules associated with serum responses. The "yellow" and "skyblue" modules, from PDGF and serum analyses, respectively, correlated with later graft stenosis (P = .005 and P = .02, respectively). In response to PDGF, yellow was also associated with increased cell growth. For serum, skyblue was also associated with inhibition of collagen gel contraction. The hub genes for yellow and skyblue (ie, the gene most connected to other genes in the module), scavenger receptor class A member 5 (SCARA5) and suprabasin (SBSN), respectively, were tested for effects on proliferation and collagen contraction. Knockdown of SCARA5 increased proliferation by 29.9% ± 7.8% (P < .01), whereas knockdown of SBSN had no effect. Knockdown of SBSN increased collagen gel contraction by 24.2% ± 8.6% (P < .05), whereas knockdown of SCARA5 had no effect. CONCLUSIONS Using weighted gene coexpression network analysis of cultured vein graft cell gene expression, we have discovered two small gene modules, which comprise 42 genes, that are associated with vein graft failure. Further experiments are needed to delineate the venous cells that express these genes in vivo and the roles these genes play in vein graft healing, starting with the module hub genes SCARA5 and SBSN, which have been shown to have modest effects on cell proliferation or collagen gel contraction.
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Stansfield BK, Ingram DA. Clinical significance of monocyte heterogeneity. Clin Transl Med 2015; 4:5. [PMID: 25852821 PMCID: PMC4384980 DOI: 10.1186/s40169-014-0040-3] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Accepted: 10/29/2014] [Indexed: 12/14/2022] Open
Abstract
Monocytes are primitive hematopoietic cells that primarily arise from the bone marrow, circulate in the peripheral blood and give rise to differentiated macrophages. Over the past two decades, considerable attention to monocyte diversity and macrophage polarization has provided contextual clues into the role of myelomonocytic derivatives in human disease. Until recently, human monocytes were subdivided based on expression of the surface marker CD16. "Classical" monocytes express surface markers denoted as CD14(++)CD16(-) and account for greater than 70% of total monocyte count, while "non-classical" monocytes express the CD16 antigen with low CD14 expression (CD14(+)CD16(++)). However, recognition of an intermediate population identified as CD14(++)CD16(+) supports the new paradigm that monocytes are a true heterogeneous population and careful identification of specific subpopulations is necessary for understanding monocyte function in human disease. Comparative studies of monocytes in mice have yielded more dichotomous results based on expression of the Ly6C antigen. In this review, we will discuss the use of monocyte subpopulations as biomarkers of human disease and summarize correlative studies in mice that may yield significant insight into the contribution of each subset to disease pathogenesis.
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Affiliation(s)
- Brian K Stansfield
- Department of Pediatrics and Neonatal-Perinatal Medicine, Georgia Regents University, Augusta, Georgia ; Vascular Biology Center, Georgia Regents University, Augusta, Georgia ; Medical College of Georgia at Georgia Regents University, 1120 15th St, BIW-6033, Augusta, GA 30912 USA
| | - David A Ingram
- Herman B. Wells Center for Pediatric Research, Georgia Regents University, Augusta, Georgia ; Department of Pediatrics and Neonatal-Perinatal Medicine, Indiana University School of Medicine, Indianapolis, Indiana USA ; Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, 699 Riley Hospital Drive, RR208, Indianapolis, IN 46202 USA
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18
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Kato T, Kawahito H, Kishida S, Irie D, Wakana N, Kikai M, Takata H, Ogata T, Ueyama T, Matoba S, Yamada H. Bone marrow angiotensin AT2 receptor deficiency aggravates atherosclerosis development by eliminating macrophage liver X receptor-mediated anti-atherogenic actions. J Renin Angiotensin Aldosterone Syst 2014; 16:936-46. [PMID: 25487979 DOI: 10.1177/1470320314561138] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Bone marrow (BM) Angiotensin II (Ang II) type 1 (AT1) receptor plays a crucial role in atherosclerosis development; however, the effect of BM Ang II type 2 (AT2) receptor on atherogenesis remains undefined. METHODS AND RESULTS We generated BM chimera apoE-deficient (apoE(-/-)) mice whose BM cells were repopulated with AT2-deficient (Agtr2(-/-)) or wild-type (Agtr2(+/+)) cells. After 2 months of a high-cholesterol diet, the atherosclerotic lesion area was significantly increased in the apoE(-/-)/BM-Agtr2(-/-) mice compared with the apoE(-/-)/BM-Agtr2(+/+) mice (51%, P < 0.05), accompanied by an augmented accumulation of lesion macrophages. Although phenotypic polarization in BM-derived macrophages and lipopolysaccharide-induced expression of proinflammatory cytokines in thioglycollate-induced peritoneal macrophages (TGPMs) were not affected by AT2-deficiency, mRNA and protein expression levels of macrophage liver X receptor β (LXRβ) were significantly decreased in Agtr2(-/-) TGPMs compared with Agtr2(+/+) TGPMs. Anti-inflammatory effects of LXR agonist (GW3965) were markedly inhibited in Agtr2(-/-) TGPMs. Furthermore, the expression levels of ATP-binding cassette transporter ABCA1 and CCR7 were much lower in Agtr2(-/-) TGPMs than Agtr2(+/+) TGPMs, accompanied by a significantly reduced cholesterol efflux. CONCLUSIONS Our findings demonstrate that BM-AT2 deficiency aggravates atherosclerosis, at least in part, by eliminating the anti-atherogenic properties of macrophages elicited by LXRβ activation.
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Affiliation(s)
- Taku Kato
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Hiroyuki Kawahito
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Sou Kishida
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Daisuke Irie
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Noriyuki Wakana
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Masakazu Kikai
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Hiroki Takata
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Takehiro Ogata
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Tomomi Ueyama
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Satoaki Matoba
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Hiroyuki Yamada
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
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19
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Irie D, Kawahito H, Wakana N, Kato T, Kishida S, Kikai M, Ogata T, Ikeda K, Ueyama T, Matoba S, Yamada H. Transplantation of periaortic adipose tissue from angiotensin receptor blocker-treated mice markedly ameliorates atherosclerosis development in apoE–/– mice. J Renin Angiotensin Aldosterone Syst 2014; 16:67-78. [DOI: 10.1177/1470320314552434] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Accepted: 08/27/2014] [Indexed: 11/16/2022] Open
Affiliation(s)
- Daisuke Irie
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Hiroyuki Kawahito
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Noriyuki Wakana
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Taku Kato
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Sou Kishida
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Masakazu Kikai
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Takehiro Ogata
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Koji Ikeda
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Tomomi Ueyama
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Satoaki Matoba
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Hiroyuki Yamada
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
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Moran CS, Jose RJ, Moxon JV, Roomberg A, Norman PE, Rush C, Körner H, Golledge J. Everolimus limits aortic aneurysm in the apolipoprotein E-deficient mouse by downregulating C-C chemokine receptor 2 positive monocytes. Arterioscler Thromb Vasc Biol 2013; 33:814-21. [PMID: 23393391 DOI: 10.1161/atvbaha.112.301006] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE We aimed to determine the effect of mechanistic target of rapamycin inhibitor everolimus on abdominal aortic aneurysm within the angiotensin II (A2)-infused apolipoprotein E-deficient mouse model. APPROACH AND RESULTS Abdominal aortic aneurysm was induced via subcutaneous infusion of A2. Flow cytometry demonstrated increased circulating and aortic C-C chemokine receptor 2 (CCR2) monocytes during A2 infusion. The number of CCR2 monocytes present within the aorta was positively correlated with suprarenal aortic diameter. Simultaneous infusion of everolimus via a second subcutaneous osmotic micropump inhibited A2-induced aortic dilatation. Using flow cytometry and Western blot analysis, decreased aortic dilatation was associated with reduced development of CCR2 bone marrow monocytes, fewer numbers of circulating CCR2 monocytes, and lower aortic CCR2 concentration. In vitro, everolimus inhibited A2-stimulated production of interferon (IFN)-γ and IFNγ-induced CCR2 expression in apolipoprotein E-deficient mouse bone marrow monocytes. Further, everolimus diminished IFNγ/lipopolysaccharide-stimulated M1 polarization in apolipoprotein E-deficient mouse bone marrow monocyte-differentiated macrophages. CONCLUSIONS Systemic administration of everolimus limits aortic aneurysm in the A2-infused apolipoprotein E-deficient mouse model via suppressed development of bone marrow CCR2 monocytes and reduced egress of these cells into the circulation.
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Affiliation(s)
- Corey S Moran
- Vascular Biology Unit, Queensland Research Centre for Peripheral Vascular Disease, School of Medicine and Dentistry, James Cook University Townsville, QLD, Australia
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22
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Local bone marrow renin-angiotensin system in primitive, definitive and neoplastic haematopoiesis. Clin Sci (Lond) 2013; 124:307-23. [PMID: 23157407 DOI: 10.1042/cs20120300] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The locally active ligand peptides, mediators, receptors and signalling pathways of the haematopoietic BM (bone marrow) autocrine/paracrine RAS (renin-angiotensin system) affect the essential steps of definitive blood cell production. Haematopoiesis, erythropoiesis, myelopoiesis, formation of monocytic and lymphocytic lineages, thrombopoiesis and other stromal cellular elements are regulated by the local BM RAS. The local BM RAS is present and active even in primitive embryonic haematopoiesis. ACE (angiotensin-converting enzyme) is expressed on the surface of the first endothelial and haematopoietic cells, forming the marrow cavity in the embryo. ACE marks early haematopoietic precursor cells and long-term blood-forming CD34(+) BM cells. The local autocrine tissue BM RAS may also be active in neoplastic haematopoiesis. Critical RAS mediators such as renin, ACE, AngII (angiotensin II) and angiotensinogen have been identified in leukaemic blast cells. The local tissue RAS influences tumour growth and metastases in an autocrine and paracrine fashion via the modulation of numerous carcinogenic events, such as angiogenesis, apoptosis, cellular proliferation, immune responses, cell signalling and extracellular matrix formation. The aim of the present review is to outline the known functions of the local BM RAS within the context of primitive, definitive and neoplastic haematopoiesis. Targeting the actions of local RAS molecules could represent a valuable therapeutic option for the management of neoplastic disorders.
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Cortez-Retamozo V, Etzrodt M, Newton A, Ryan R, Pucci F, Sio SW, Kuswanto W, Rauch PJ, Chudnovskiy A, Iwamoto Y, Kohler R, Marinelli B, Gorbatov R, Wojtkiewicz G, Panizzi P, Mino-Kenudson M, Forghani R, Figueiredo JL, Chen JW, Xavier R, Swirski FK, Nahrendorf M, Weissleder R, Pittet MJ. Angiotensin II drives the production of tumor-promoting macrophages. Immunity 2013; 38:296-308. [PMID: 23333075 DOI: 10.1016/j.immuni.2012.10.015] [Citation(s) in RCA: 141] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2012] [Accepted: 10/02/2012] [Indexed: 12/31/2022]
Abstract
Macrophages frequently infiltrate tumors and can enhance cancer growth, yet the origins of the macrophage response are not well understood. Here we address molecular mechanisms of macrophage production in a conditional mouse model of lung adenocarcinoma. We report that overproduction of the peptide hormone Angiotensin II (AngII) in tumor-bearing mice amplifies self-renewing hematopoietic stem cells (HSCs) and macrophage progenitors. The process occurred in the spleen but not the bone marrow, and was independent of hemodynamic changes. The effects of AngII required direct hormone ligation on HSCs, depended on S1P(1) signaling, and allowed the extramedullary tissue to supply new tumor-associated macrophages throughout cancer progression. Conversely, blocking AngII production prevented cancer-induced HSC and macrophage progenitor amplification and thus restrained the macrophage response at its source. These findings indicate that AngII acts upstream of a potent macrophage amplification program and that tumors can remotely exploit the hormone's pathway to stimulate cancer-promoting immunity.
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Affiliation(s)
- Virna Cortez-Retamozo
- Center for Systems Biology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
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Bernstein KE, Ong FS, Blackwell WLB, Shah KH, Giani JF, Gonzalez-Villalobos RA, Shen XZ, Fuchs S, Touyz RM. A modern understanding of the traditional and nontraditional biological functions of angiotensin-converting enzyme. Pharmacol Rev 2012; 65:1-46. [PMID: 23257181 DOI: 10.1124/pr.112.006809] [Citation(s) in RCA: 201] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Angiotensin-converting enzyme (ACE) is a zinc-dependent peptidase responsible for converting angiotensin I into the vasoconstrictor angiotensin II. However, ACE is a relatively nonspecific peptidase that is capable of cleaving a wide range of substrates. Because of this, ACE and its peptide substrates and products affect many physiologic processes, including blood pressure control, hematopoiesis, reproduction, renal development, renal function, and the immune response. The defining feature of ACE is that it is composed of two homologous and independently catalytic domains, the result of an ancient gene duplication, and ACE-like genes are widely distributed in nature. The two ACE catalytic domains contribute to the wide substrate diversity of ACE and, by extension, the physiologic impact of the enzyme. Several studies suggest that the two catalytic domains have different biologic functions. Recently, the X-ray crystal structure of ACE has elucidated some of the structural differences between the two ACE domains. This is important now that ACE domain-specific inhibitors have been synthesized and characterized. Once widely available, these reagents will undoubtedly be powerful tools for probing the physiologic actions of each ACE domain. In turn, this knowledge should allow clinicians to envision new therapies for diseases not currently treated with ACE inhibitors.
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Affiliation(s)
- Kenneth E Bernstein
- Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Davis 2021, Los Angeles, CA 90048, USA.
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Iida Y, Xu B, Schultz GM, Chow V, White JJ, Sulaimon S, Hezi-Yamit A, Peterson SR, Dalman RL. Efficacy and mechanism of angiotensin II receptor blocker treatment in experimental abdominal aortic aneurysms. PLoS One 2012; 7:e49642. [PMID: 23226500 PMCID: PMC3513299 DOI: 10.1371/journal.pone.0049642] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2012] [Accepted: 10/16/2012] [Indexed: 11/18/2022] Open
Abstract
Background Despite the importance of the renin-angiotensin (Ang) system in abdominal aortic aneurysm (AAA) pathogenesis, strategies targeting this system to prevent clinical aneurysm progression remain controversial and unproven. We compared the relative efficacy of two Ang II type 1 receptor blockers, telmisartan and irbesartan, in limiting experimental AAAs in distinct mouse models of aneurysm disease. Methodology/Principal Findings AAAs were induced using either 1) Ang II subcutaneous infusion (1000 ng/kg/min) for 28 days in male ApoE−/− mice, or 2) transient intra-aortic porcine pancreatic elastase infusion in male C57BL/6 mice. One week prior to AAA creation, mice started to daily receive irbesartan (50 mg/kg), telmisartan (10 mg/kg), fluvastatin (40 mg/kg), bosentan (100 mg/kg), doxycycline (100 mg/kg) or vehicle alone. Efficacy was determined via serial in vivo aortic diameter measurements, histopathology and gene expression analysis at sacrifice. Aortic aneurysms developed in 67% of Ang II-infused ApoE−/− mice fed with standard chow and water alone (n = 15), and 40% died of rupture. Strikingly, no telmisartan-treated mouse developed an AAA (n = 14). Both telmisartan and irbesartan limited aneurysm enlargement, medial elastolysis, smooth muscle attenuation, macrophage infiltration, adventitial neocapillary formation, and the expression of proteinases and proinflammatory mediators. Doxycycline, fluvastatin and bosentan did not influence aneurysm progression. Telmisartan was also highly effective in intra-aortic porcine pancreatic elastase infusion-induced AAAs, a second AAA model that did not require exogenous Ang II infusion. Conclusion/Significance Telmisartan suppresses experimental aneurysms in a model-independent manner and may prove valuable in limiting clinical disease progression.
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Affiliation(s)
- Yasunori Iida
- Division of Vascular Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California, United States of America
| | - Baohui Xu
- Division of Vascular Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California, United States of America
| | - Geoffrey M. Schultz
- Division of Vascular Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California, United States of America
| | - Vinca Chow
- Division of Vascular Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California, United States of America
| | - Julie J. White
- Division of Vascular Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California, United States of America
| | - Shola Sulaimon
- Medtronic Vascular Inc., Santa Rosa, California, United States of America
| | - Ayala Hezi-Yamit
- Medtronic Vascular Inc., Santa Rosa, California, United States of America
| | - Susan Rea Peterson
- Medtronic Vascular Inc., Santa Rosa, California, United States of America
| | - Ronald L. Dalman
- Division of Vascular Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California, United States of America
- * E-mail:
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Lu H, Balakrishnan A, Howatt DA, Wu C, Charnigo R, Liau G, Cassis LA, Daugherty A. Comparative effects of different modes of renin angiotensin system inhibition on hypercholesterolaemia-induced atherosclerosis. Br J Pharmacol 2012; 165:2000-2008. [PMID: 22014125 DOI: 10.1111/j.1476-5381.2011.01712.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND AND PURPOSE Inhibition of the renin angiotensin system (RAS) has been consistently demonstrated to reduce atherosclerosis. However, there has been no direct comparison among the three available pharmacological modes of inhibiting the RAS, which are inhibitors of renin, ACE and angiotensin II type 1 receptor. The purpose of this study was to determine the relative effects of these three modes of pharmacological RAS inhibition in reducing atherosclerosis by determining the dose-response relationships. EXPERIMENTAL APPROACH Male LDL receptor -/- mice were administered either vehicle or any of three doses of aliskiren, enalapril or losartan through s.c. infusion for 12 weeks. All mice were fed a saturated fat-enriched diet during drug infusions. Systolic and diastolic BPs were measured during the study using a non-invasive tail-cuff system. Plasma cholesterol and renin concentrations, atherosclerotic lesions, and renal angiotensin II concentrations were determined at the termination of the study. KEY RESULTS Plasma renin concentrations were increased by all three drugs. None of the drugs changed plasma cholesterol concentrations. All drugs produced a dose-related decrease in BP. All three drugs also profoundly reduced atherosclerosis in a dose-dependent manner. The highest dose of each drug markedly attenuated lesion size, with no significant differences between the different drugs. The highest dose of each drug also similarly reduced renal angiotensin II concentrations. CONCLUSION AND IMPLICATIONS Drugs that inhibit the RAS, irrespective of their mode of inhibition, profoundly affect atherosclerotic lesion development in a dose-dependent manner.
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Affiliation(s)
- Hong Lu
- Saha Cardiovascular Research CenterGraduate Center for Nutritional SciencesDepartment of Statistics, University of Kentucky, Lexington, KY, USANovartis Institutes for Biomedical Research, Cambridge, MA, USA
| | - Anju Balakrishnan
- Saha Cardiovascular Research CenterGraduate Center for Nutritional SciencesDepartment of Statistics, University of Kentucky, Lexington, KY, USANovartis Institutes for Biomedical Research, Cambridge, MA, USA
| | - Deborah A Howatt
- Saha Cardiovascular Research CenterGraduate Center for Nutritional SciencesDepartment of Statistics, University of Kentucky, Lexington, KY, USANovartis Institutes for Biomedical Research, Cambridge, MA, USA
| | - Congqing Wu
- Saha Cardiovascular Research CenterGraduate Center for Nutritional SciencesDepartment of Statistics, University of Kentucky, Lexington, KY, USANovartis Institutes for Biomedical Research, Cambridge, MA, USA
| | - Richard Charnigo
- Saha Cardiovascular Research CenterGraduate Center for Nutritional SciencesDepartment of Statistics, University of Kentucky, Lexington, KY, USANovartis Institutes for Biomedical Research, Cambridge, MA, USA
| | - Gene Liau
- Saha Cardiovascular Research CenterGraduate Center for Nutritional SciencesDepartment of Statistics, University of Kentucky, Lexington, KY, USANovartis Institutes for Biomedical Research, Cambridge, MA, USA
| | - Lisa A Cassis
- Saha Cardiovascular Research CenterGraduate Center for Nutritional SciencesDepartment of Statistics, University of Kentucky, Lexington, KY, USANovartis Institutes for Biomedical Research, Cambridge, MA, USA
| | - Alan Daugherty
- Saha Cardiovascular Research CenterGraduate Center for Nutritional SciencesDepartment of Statistics, University of Kentucky, Lexington, KY, USANovartis Institutes for Biomedical Research, Cambridge, MA, USA
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Calpain inhibition attenuates angiotensin II-induced abdominal aortic aneurysms and atherosclerosis in low-density lipoprotein receptor-deficient mice. J Cardiovasc Pharmacol 2012; 59:66-76. [PMID: 21964156 DOI: 10.1097/fjc.0b013e318235d5ea] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Chronic infusion of angiotensin II (AngII) augments atherosclerosis and abdominal aortic aneurysm (AAA) formation in hypercholesterolemic mice. AngII-induced AAAs are associated with medial macrophage accumulation and matrix metalloproteinase (MMP) activation. Inhibition of calpain, a calcium-activated neutral cysteine protease, by overexpression of its endogenous inhibitor, calpastatin, attenuates AngII-induced leukocyte infiltration, perivascular inflammation, and MMP activation in mice. The purpose of this study was to define whether pharmacological inhibition of calpain influences AngII-induced AAAs in hypercholesterolemic mice. Male low-density lipoprotein receptor-/- mice were fed a fat-enriched diet and administered with either vehicle or a calpain-specific inhibitor, BDA-410 (30 mg/kg per day) for 5 weeks. After 1 week of feeding, mice were infused with AngII (1000 ng/kg per minute) for 4 weeks. AngII-infusion profoundly increased aortic calpain protein and activity. BDA-410 administration had no effect on plasma cholesterol concentrations or AngII-increased systolic blood pressure. Calpain inhibition significantly attenuated AngII-induced AAA formation and atherosclerosis development. BDA-410 administration attenuated activation of MMP12, proinflammatory cytokines (IL-6, monocyte chemoattractant protein-1), and macrophage infiltration into the aorta. BDA-410 administration significantly attenuated thioglycolate-elicited macrophage accumulation in the peritoneal cavity. We conclude that calpain inhibition using BDA-410 attenuated AngII-induced AAA formation and atherosclerosis development in low-density lipoprotein receptor-/- mice.
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Abstract
Modulation of the RAS (renin–angiotensin system), in particular of the function of the hormones AngII (angiotensin II) and Ang-(1–7) [angiotensin-(1–7)], is an important target for pharmacotherapy in the cardiovascular system. In the classical view, such modulation affects cardiovascular cells to decrease hypertrophy, fibrosis and endothelial dysfunction, and improves diuresis. In this view, excessive stimulation of AT1 receptors (AngII type 1 receptors) fulfils a detrimental role, as it promotes cardiovascular pathogenesis, and this is opposed by stimulation of the AT2 receptor (angiotensin II type 2 receptor) and the Ang-(1–7) receptor encoded by the Mas proto-oncogene. In recent years, this view has been broadened with the observation that the RAS regulates bone marrow stromal cells and stem cells, thus involving haematopoiesis and tissue regeneration by progenitor cells. This change of paradigm has enlarged the field of perspectives for therapeutic application of existing as well as newly developed medicines that alter angiotensin signalling, which now stretches beyond cardiovascular therapy. In the present article, we review the role of AngII and Ang-(1–7) and their respective receptors in haematopoietic and mesenchymal stem cells, and discuss possible pharmacotherapeutical implications.
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Deficiency of ACE2 in Bone-Marrow-Derived Cells Increases Expression of TNF-α in Adipose Stromal Cells and Augments Glucose Intolerance in Obese C57BL/6 Mice. Int J Hypertens 2012; 2012:762094. [PMID: 22518292 PMCID: PMC3296206 DOI: 10.1155/2012/762094] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2011] [Revised: 10/17/2011] [Accepted: 10/24/2011] [Indexed: 01/26/2023] Open
Abstract
Deficiency of ACE2 in macrophages has been suggested to promote the development of an inflammatory M1 macrophage phenotype. We evaluated effects of ACE2 deficiency in bone-marrow-derived stem cells on adipose inflammation and glucose tolerance in C57BL/6 mice fed a high fat (HF) diet. ACE2 activity was increased in the stromal vascular fraction (SVF) isolated from visceral, but not subcutaneous adipose tissue of HF-fed mice. Deficiency of ACE2 in bone marrow cells significantly increased mRNA abundance of F4/80 and TNF-α in the SVF isolated from visceral adipose tissue of HF-fed chimeric mice, supporting increased presence of inflammatory macrophages in adipose tissue. Moreover, deficiency of ACE2 in bone marrow cells modestly augmented glucose intolerance in HF-fed chimeric mice and increased blood levels of glycosylated hemoglobin. In summary, ACE2 deficiency in bone marrow cells promotes inflammation in adipose tissue and augments obesity-induced glucose intolerance.
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Yamamoto S, Yancey PG, Zuo Y, Ma LJ, Kaseda R, Fogo AB, Ichikawa I, Linton MF, Fazio S, Kon V. Macrophage polarization by angiotensin II-type 1 receptor aggravates renal injury-acceleration of atherosclerosis. Arterioscler Thromb Vasc Biol 2011; 31:2856-64. [PMID: 21979434 DOI: 10.1161/atvbaha.111.237198] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
OBJECTIVE Angiotensin II is a major determinant of atherosclerosis. Although macrophages are the most abundant cells in atherosclerotic plaques and express angiotensin II type 1 receptor (AT1), the pathophysiologic role of macrophage AT1 in atherogenesis remains uncertain. We examined the contribution of macrophage AT1 to accelerated atherosclerosis in an angiotensin II-responsive setting induced by uninephrectomy (UNx). METHODS AND RESULTS AT1(-/-) or AT1(+/+) marrow from apolipoprotein E deficient (apoE(-/-)) mice was transplanted into recipient apoE(-/-) mice with subsequent UNx or sham operation: apoE(-/-)/AT1(+/+)→apoE(-/-)+sham; apoE(-/-)/AT1(+/+) →apoE(-/-)+UNx; apoE(-/-)/AT1(-/-)→apoE(-/-)+sham; apoE(-/-)/AT1(-/-)→apoE(-/-)+UNx. No differences in body weight, blood pressure, lipid profile, and serum creatinine were observed between the 2 UNx groups. ApoE(-/-)/AT1(+/+) →apoE(-/-)+UNx had significantly more atherosclerosis (16907±21473 versus 116071±8180 μm(2), P<0.05). By contrast, loss of macrophage AT1 which reduced local AT1 expression, prevented any effect of UNx on atherosclerosis (77174±9947 versus 75714±11333 μm(2), P=NS). Although UNx did not affect total macrophage content in the atheroma, lesions in apoE(-/-)/AT1(-/-)→apoE(-/-)+UNx had fewer classically activated macrophage phenotype (M1) and more alternatively activated phenotype (M2). Further, UNx did not affect plaque necrosis or apoptosis in apoE(-/-)/AT1(-/-)→apoE(-/-) whereas it significantly increased both (by 2- and 6-fold, respectively) in apoE(-/-)/AT1(+/+) →apoE(-/-) mice. Instead, apoE(-/-)/AT1(-/-)→apoE(-/-) had 5-fold-increase in macrophage-associated apoptotic bodies, indicating enhanced efferocytosis. In vitro studies confirmed blunted susceptibility to apoptosis, especially in M2 macrophages, and a more efficient phagocytic function of AT1(-/-) macrophages versus AT1(+/+). CONCLUSIONS AT1 receptor of bone marrow-derived macrophages worsens the extent and complexity of renal injury-induced atherosclerosis by shifting the macrophage phenotype to more M1 and less M2 through mechanisms that include increased apoptosis and impaired efferocytosis.
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Affiliation(s)
- Suguru Yamamoto
- Department of Pediatrics, Vanderbilt University Medical Center, 1161 21st Avenue South, C-4204 Medical Center North, Nashville, TN 37232-2584, USA
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Iwanami J, Mogi M, Tsukuda K, Min LJ, Sakata A, Jing F, Ohshima K, Horiuchi M. Effect of Angiotensin II Type 2 Receptor Deletion in Hematopoietic Cells on Brain Ischemia-Reperfusion Injury. Hypertension 2011; 58:404-9. [DOI: 10.1161/hypertensionaha.111.177873] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Jun Iwanami
- From the Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University, Graduate School of Medicine, Tohon, Ehime, Japan
| | - Masaki Mogi
- From the Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University, Graduate School of Medicine, Tohon, Ehime, Japan
| | - Kana Tsukuda
- From the Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University, Graduate School of Medicine, Tohon, Ehime, Japan
| | - Li-Juan Min
- From the Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University, Graduate School of Medicine, Tohon, Ehime, Japan
| | - Akiko Sakata
- From the Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University, Graduate School of Medicine, Tohon, Ehime, Japan
| | - Fei Jing
- From the Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University, Graduate School of Medicine, Tohon, Ehime, Japan
| | - Kousei Ohshima
- From the Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University, Graduate School of Medicine, Tohon, Ehime, Japan
| | - Masatsugu Horiuchi
- From the Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University, Graduate School of Medicine, Tohon, Ehime, Japan
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32
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Shen XZ, Bernstein KE. The peptide network regulated by angiotensin converting enzyme (ACE) in hematopoiesis. Cell Cycle 2011; 10:1363-9. [PMID: 21441775 DOI: 10.4161/cc.10.9.15444] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The concept of a local bone marrow renin-angiotensin system (RAS) has been introduced and accumulating evidence suggests that the local RAS is actively involved in hematopoiesis. Angiotensin converting enzyme (ACE) is a key player in the RAS and makes the final effector angiotensin II. Besides angiotensin II, ACE also regulates a panel of bioactive peptides, such as substance P, Ac-SDKP and angiotensin 1-7. These peptides have also been individually reported in the regulation of pathways of hematopoiesis. In this setting, an ACE-regulated peptide network orchestrating hematopoiesis has emerged. Here, we focus on this peptide network and discuss the roles of ACE and its peptides in aspects of hematopoiesis. Special attention is given to the recent revelation that ACE is a bona fide marker of hematopoietic stem cells.
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Affiliation(s)
- Xiao Z Shen
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, USA.
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Abstract
Patients with chronic kidney disease (CKD) are at increased risk of atherosclerotic cardiovascular disease and loss of renal parenchyma accelerates atherosclerosis in animal models. Macrophages are central to atherogenesis because they regulate cholesterol traffic and inflammation in the arterial wall. CKD influences macrophage behavior at multiple levels, rendering them proatherogenic. Even at normal creatinine levels, macrophages from uninephrectomized Apoe(-/-) mice are enriched in cholesterol owing to downregulation of cholesterol transporter ATP-binding cassette subfamily A member 1 levels and activation of nuclear factor κB, which leads to impaired cholesterol efflux. Interestingly, treatment with an angiotensin-II-receptor blocker (ARB) improves these effects. Moreover, atherosclerotic aortas from Apoe(-/-) mice transplanted into renal-ablated normocholesterolemic recipients show plaque progression and increased macrophage content instead of the substantial regression seen in recipient mice with intact kidneys. ARBs reduce atherosclerosis development in mice with partial renal ablation. These results, combined with the clinical benefits of angiotensin-converting-enzyme (ACE) inhibitors and ARBs in patients with CKD, suggest an important role for the angiotensin system in the enhanced susceptibility to atherosclerosis seen across the spectrum of CKD. The role of macrophages could explain why these therapies may be effective in end-stage renal disease, one of the few conditions in which statins show no clinical benefit.
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Affiliation(s)
- Valentina Kon
- Department of Pediatrics, Vanderbilt University Medical Center, 383 Preston Research Building, 2220 Pierce Avenue, Nashville, TN 37332-6300, USA
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34
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Yvan-Charvet L, Quignard-Boulangé A. Role of adipose tissue renin–angiotensin system in metabolic and inflammatory diseases associated with obesity. Kidney Int 2011; 79:162-8. [DOI: 10.1038/ki.2010.391] [Citation(s) in RCA: 150] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Beyazit Y, Purnak T, Guven GS, Haznedaroglu IC. Local bone marrow Renin-Angiotensin system and atherosclerosis. Cardiol Res Pract 2010; 2011:714515. [PMID: 21234405 PMCID: PMC3014698 DOI: 10.4061/2011/714515] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2010] [Revised: 10/14/2010] [Accepted: 10/23/2010] [Indexed: 12/13/2022] Open
Abstract
Local hematopoietic bone marrow (BM) renin-angiotensin system (RAS) affects the growth, production, proliferation differentiation, and function of hematopoietic cells. Angiotensin II (Ang II), the dominant effector peptide of the RAS, regulates cellular growth in a wide variety of tissues in pathobiological states. RAS, especially Ang II and Ang II type 1 receptor (AT1R), has considerable proinflammatory and proatherogenic effects on the vessel wall, causing progression of atherosclerosis. Recent investigations, by analyzing several BM chimeric mice whose BM cells were positive or negative for AT1R, disclosed that AT1R in BM cells participates in the pathogenesis of atherosclerosis. Therefore, AT1R blocking not only in vascular cells but also in the BM could be an important therapeutic approach to prevent atherosclerosis. The aim of this paper is to review the function of local BM RAS in the pathogenesis of atherosclerosis.
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Affiliation(s)
- Yavuz Beyazit
- Department of Gastroenterology, Turkiye Yuksek Ihtisas Teaching and Research Hospital, 06100 Ankara, Turkey
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36
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Lin C, Datta V, Okwan-Duodu D, Chen X, Fuchs S, Alsabeh R, Billet S, Bernstein KE, Shen XZ. Angiotensin-converting enzyme is required for normal myelopoiesis. FASEB J 2010; 25:1145-55. [PMID: 21148418 DOI: 10.1096/fj.10-169433] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Inhibition of angiotensin-converting enzyme (ACE) induces anemia in humans and mice, but it is unclear whether ACE is involved in other aspects of hematopoiesis. Here, we systemically evaluated ACE-knockout (KO) mice and found myelopoietic abnormalities characterized by increased bone marrow myeloblasts and myelocytes, as well as extramedullary myelopoiesis. Peritoneal macrophages from ACE-KO mice were deficient in the production of effector molecules, such as tumor necrosis factor-α, interleukin-12p40, and CD86 when stimulated with lipopolysaccharide and interferon-γ. ACE-KO mice were more susceptible to Staphylococcus aureus infection. Further studies using total or fractionated bone marrows revealed that ACE regulates myeloid proliferation, differentiation, and functional maturation via angiotensin II and substance P and through the angiotensin II receptor type 1 and substance P neurokinin 1 receptors. Angiotensin II was correlated with CCAAT-enhancer-binding protein-α up-regulation during myelopoiesis. Angiotensin II supplementation of ACE-KO mice rescued macrophage functional maturation. These results demonstrate a previous unrecognized significant role for ACE in myelopoiesis and imply new perspectives for manipulating myeloid cell expansion and maturation.
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Affiliation(s)
- Chentao Lin
- Department of Biomedical Science, Cedars-Sinai Medical Center, Los Angeles, California, USA
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Che J, Okigaki M, Takahashi T, Katsume A, Adachi Y, Yamaguchi S, Matsunaga S, Takeda M, Matsui A, Kishita E, Ikeda K, Yamada H, Matsubara H. Endothelial FGF receptor signaling accelerates atherosclerosis. Am J Physiol Heart Circ Physiol 2010; 300:H154-61. [PMID: 20952669 DOI: 10.1152/ajpheart.00075.2010] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Members of the fibroblast growth factor (FGF) family have been clinically applied to the treatment of ischemic diseases because of their strong angiogenic actions. Although tissue ischemia is predominantly caused by atherosclerosis, the roles of endothelial FGF receptors (FGF-Rs) in atherosclerosis remain obscure. We generated endothelial cell (EC)-targeted constitutively active FGF-R2-overexpressing mice, using the Tie2 promoter (Tie2-FGF-R2-Tg), and crossed them with apolipoprotein E (ApoE)-deficient mice (ApoE-KO) to generate Tie2-FGF-R2-Tg/ApoE-deficient mice (Tie2-FGF-R2-Tg/ApoE-KO). After being fed a Western diet for 8 wk, the Tie2-FGF-R2-Tg/ApoE-KO demonstrated 2.0-fold greater atherosclerotic lesion area on the luminal surfaces of the aortas than the ApoE-KO (P < 0.01). The level of p21(Cip1) protein, a cell cycle inhibitor, in the FGF-R2-overexpressing EC was 2.5-fold greater than that in the wild-type (WT) EC at the baseline (P < 0.01). FGF-R2 overexpression in the EC resulted in increased expression of VCAM-1 and ICAM-1, acceleration of apoptosis, and decreased proliferative activity, all of which were normalized by small interfering RNA (siRNA)-mediated knockdown of p21(Cip1) (75% reduction in protein level, P < 0.01). Furthermore, the expression of PDGF-B and Egr-1, a PDGF/p21(Cip1)-inducible transcription factor, in the aortic endothelium of Tie2-FGF-R2-Tg/ApoE-KO was significantly greater than that in ApoE-KO. The proliferation of vascular smooth muscle cells in the aortic media of Tie2-FGF-R2-Tg/ApoE-KO was 2.0-fold higher than that in ApoE-KO (P < 0.01). Thus our study reveals that endothelial FGF-R2 signaling aggravates atherosclerosis by promoting p21(Cip1)-mediated EC dysfunction and cautions against the use of FGF for therapeutic angiogenesis in the setting of atherosclerosis.
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Affiliation(s)
- Jishan Che
- Department of Cardiovascular Medicine, Kyoto Prefectural University School of Medicine, Kyoto, Japan
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Leuschner F, Panizzi P, Chico-Calero I, Lee WW, Ueno T, Cortez-Retamozo V, Waterman P, Gorbatov R, Marinelli B, Iwamoto Y, Chudnovskiy A, Figueiredo JL, Sosnovik DE, Pittet MJ, Swirski FK, Weissleder R, Nahrendorf M. Angiotensin-converting enzyme inhibition prevents the release of monocytes from their splenic reservoir in mice with myocardial infarction. Circ Res 2010; 107:1364-73. [PMID: 20930148 DOI: 10.1161/circresaha.110.227454] [Citation(s) in RCA: 181] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
RATIONALE Monocytes recruited to ischemic myocardium originate from a reservoir in the spleen, and the release from their splenic niche relies on angiotensin (Ang) II signaling. OBJECTIVE Because monocytes are centrally involved in tissue repair after ischemia, we hypothesized that early angiotensin-converting enzyme (ACE) inhibitor therapy impacts healing after myocardial infarction partly via effects on monocyte traffic. METHODS AND RESULTS In a mouse model of permanent coronary ligation, enalapril arrested the release of monocytes from the splenic reservoir and consequently reduced their recruitment into the healing infarct by 45%, as quantified by flow cytometry of digested infarcts. Time-lapse intravital microscopy revealed that enalapril reduces monocyte motility in the spleen. In vitro migration assays and Western blotting showed that this was caused by reduced signaling through the Ang II type 1 receptor. We then studied the long-term consequences of blocked splenic monocyte release in atherosclerotic apolipoprotein (apo)E(-/-) mice, in which infarct healing is impaired because of excessive inflammation in the cardiac wound. Enalapril improved histologic healing biomarkers and reduced inflammation in infarcts measured by FMT-CT (fluorescence molecular tomography in conjunction with x-ray computed tomography) of proteolytic activity. ACE inhibition improved MRI-derived ejection fraction by 14% on day 21, despite initially comparable infarct size. In apoE(-/-) mice, ischemia/reperfusion injury resulted in larger infarct size and enhanced monocyte recruitment and was reversible by enalapril treatment. Splenectomy reproduced antiinflammatory effects of enalapril. CONCLUSION This study suggests that benefits of early ACE inhibition after myocardial infarction can partially be attributed to its potent antiinflammatory impact on the splenic monocyte reservoir.
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Affiliation(s)
- Florian Leuschner
- Center for Systems Biology, Massachusetts General Hospital and Harvard Medical School, USA
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Daugherty A, Poduri A, Chen X, Lu H, Cassis LA. Genetic variants of the Renin Angiotensin system: effects on atherosclerosis in experimental models and humans. Curr Atheroscler Rep 2010; 12:167-73. [PMID: 20425255 PMCID: PMC2857789 DOI: 10.1007/s11883-010-0109-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The renin angiotensin system (RAS) has profound effects on atherosclerosis development in animal models, which is partially complimented by evidence in the human disease. Although angiotensin II was considered to be the principal effector of the RAS, a broader array of bioactive angiotensin peptides have been identified that have increased the scope of enzymes and receptors in the RAS. Genetic interruption of the synthesis of these peptides has not been extensively performed in experimental or human studies. A few studies demonstrate that interruption of a component of the angiotensin peptide synthesis pathway reduces experimental lesion formation. The evidence in human studies has not been consistent. Conversely, genetic manipulation of the RAS receptors has demonstrated that AT1a receptors are profoundly involved in experimental atherosclerosis. Few studies have reported links of genetic variants of angiotensin II receptors to human atherosclerotic diseases. Further genetic studies are needed to define the role of RAS in atherosclerosis.
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Affiliation(s)
- Alan Daugherty
- Saha Cardiovascular Research Center, University of Kentucky, BBSRB, Room B-243, Lexington, KY 40536-0509, USA.
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