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Li R, Hanna A, Huang S, Hernandez SC, Tuleta I, Kubota A, Humeres C, Chen B, Liu Y, Zheng D, Frangogiannis NG. Macrophages in the infarcted heart acquire a fibrogenic phenotype, expressing matricellular proteins, but do not undergo fibroblast conversion. J Mol Cell Cardiol 2024:S0022-2828(24)00126-3. [PMID: 39089570 DOI: 10.1016/j.yjmcc.2024.07.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 07/25/2024] [Accepted: 07/29/2024] [Indexed: 08/04/2024]
Abstract
Although some studies have suggested that macrophages may secrete structural collagens, and convert to fibroblast-like cells, macrophage to fibroblast transdifferentiation in infarcted and remodeling hearts remains controversial. Our study uses linage tracing approaches and single cell transcriptomics to examine whether macrophages undergo fibroblast conversion, and to characterize the extracellular matrix expression profile of myeloid cells in myocardial infarction. To examine whether infarct macrophages undergo fibroblast conversion, we identified macrophage-derived progeny using the inducible CX3CR1CreER mice crossed with the PDGFRαEGFP reporter line for reliable fibroblast identification. The abundant fibroblasts that infiltrated the infarcted myocardium after 7 and 28 days of coronary occlusion were not derived from CX3CR1+ macrophages. Infarct macrophages retained myeloid cell characteristics and did not undergo conversion to myofibroblasts, endothelial or vascular mural cells. Single cell RNA-seq of CSF1R+ myeloid cells harvested from control and infarcted hearts showed no significant expression of fibroblast identity genes by myeloid cell clusters. Moreover, infarct macrophages did not express significant levels of genes encoding structural collagens. However, infarct macrophage and monocyte clusters were the predominant source of the fibrogenic growth factors Tgfb1 and Pdgfb, and of the matricellular proteins Spp1/Osteopontin, Thbs1/Thrombospondin-1, Emilin2, and Fn1/fibronectin, while expressing significant amounts of several other matrix genes, including Vcan/versican, Ecm1 and Sparc. ScRNA-seq data suggested similar patterns of matrix gene expression in human myocardial infarction. In conclusion, infarct macrophages do not undergo fibroblast or myofibroblast conversion and do not exhibit upregulation of structural collagens but may contribute to fibrotic remodeling by producing several fibrogenic matricellular proteins.
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Affiliation(s)
- Ruoshui Li
- The Wilf Family Cardiovascular Research Institute, Department of Medicine (Cardiology), Albert Einstein College of Medicine, Bronx, NY, USA; Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Anis Hanna
- The Wilf Family Cardiovascular Research Institute, Department of Medicine (Cardiology), Albert Einstein College of Medicine, Bronx, NY, USA; Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Shuaibo Huang
- The Wilf Family Cardiovascular Research Institute, Department of Medicine (Cardiology), Albert Einstein College of Medicine, Bronx, NY, USA; Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Silvia C Hernandez
- The Wilf Family Cardiovascular Research Institute, Department of Medicine (Cardiology), Albert Einstein College of Medicine, Bronx, NY, USA; Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Izabela Tuleta
- The Wilf Family Cardiovascular Research Institute, Department of Medicine (Cardiology), Albert Einstein College of Medicine, Bronx, NY, USA; Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Akihiko Kubota
- The Wilf Family Cardiovascular Research Institute, Department of Medicine (Cardiology), Albert Einstein College of Medicine, Bronx, NY, USA; Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Claudio Humeres
- The Wilf Family Cardiovascular Research Institute, Department of Medicine (Cardiology), Albert Einstein College of Medicine, Bronx, NY, USA; Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Bijun Chen
- The Wilf Family Cardiovascular Research Institute, Department of Medicine (Cardiology), Albert Einstein College of Medicine, Bronx, NY, USA; Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Yang Liu
- Department of Genetics, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Deyou Zheng
- Department of Genetics, Albert Einstein College of Medicine, Bronx, NY, USA; Department of Neurology, Albert Einstein College of Medicine, Bronx, NY, USA; Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Nikolaos G Frangogiannis
- The Wilf Family Cardiovascular Research Institute, Department of Medicine (Cardiology), Albert Einstein College of Medicine, Bronx, NY, USA; Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, USA.
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Chen R, Zhang H, Tang B, Luo Y, Yang Y, Zhong X, Chen S, Xu X, Huang S, Liu C. Macrophages in cardiovascular diseases: molecular mechanisms and therapeutic targets. Signal Transduct Target Ther 2024; 9:130. [PMID: 38816371 PMCID: PMC11139930 DOI: 10.1038/s41392-024-01840-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Revised: 04/02/2024] [Accepted: 04/21/2024] [Indexed: 06/01/2024] Open
Abstract
The immune response holds a pivotal role in cardiovascular disease development. As multifunctional cells of the innate immune system, macrophages play an essential role in initial inflammatory response that occurs following cardiovascular injury, thereby inducing subsequent damage while also facilitating recovery. Meanwhile, the diverse phenotypes and phenotypic alterations of macrophages strongly associate with distinct types and severity of cardiovascular diseases, including coronary heart disease, valvular disease, myocarditis, cardiomyopathy, heart failure, atherosclerosis and aneurysm, which underscores the importance of investigating macrophage regulatory mechanisms within the context of specific diseases. Besides, recent strides in single-cell sequencing technologies have revealed macrophage heterogeneity, cell-cell interactions, and downstream mechanisms of therapeutic targets at a higher resolution, which brings new perspectives into macrophage-mediated mechanisms and potential therapeutic targets in cardiovascular diseases. Remarkably, myocardial fibrosis, a prevalent characteristic in most cardiac diseases, remains a formidable clinical challenge, necessitating a profound investigation into the impact of macrophages on myocardial fibrosis within the context of cardiac diseases. In this review, we systematically summarize the diverse phenotypic and functional plasticity of macrophages in regulatory mechanisms of cardiovascular diseases and unprecedented insights introduced by single-cell sequencing technologies, with a focus on different causes and characteristics of diseases, especially the relationship between inflammation and fibrosis in cardiac diseases (myocardial infarction, pressure overload, myocarditis, dilated cardiomyopathy, diabetic cardiomyopathy and cardiac aging) and the relationship between inflammation and vascular injury in vascular diseases (atherosclerosis and aneurysm). Finally, we also highlight the preclinical/clinical macrophage targeting strategies and translational implications.
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Affiliation(s)
- Runkai Chen
- Department of Cardiology, Laboratory of Heart Center, Heart Center, Translational Medicine Research Center, Zhujiang Hospital, Southern Medical University, 253 Industrial Avenue, Guangzhou, 510280, China
| | - Hongrui Zhang
- Department of Cardiology, Laboratory of Heart Center, Heart Center, Translational Medicine Research Center, Zhujiang Hospital, Southern Medical University, 253 Industrial Avenue, Guangzhou, 510280, China
| | - Botao Tang
- Department of Cardiology, Laboratory of Heart Center, Heart Center, Translational Medicine Research Center, Zhujiang Hospital, Southern Medical University, 253 Industrial Avenue, Guangzhou, 510280, China
| | - Yukun Luo
- Department of Cardiology, Laboratory of Heart Center, Heart Center, Translational Medicine Research Center, Zhujiang Hospital, Southern Medical University, 253 Industrial Avenue, Guangzhou, 510280, China
| | - Yufei Yang
- Department of Cardiology, Laboratory of Heart Center, Heart Center, Translational Medicine Research Center, Zhujiang Hospital, Southern Medical University, 253 Industrial Avenue, Guangzhou, 510280, China
| | - Xin Zhong
- Department of Cardiology, Laboratory of Heart Center, Heart Center, Translational Medicine Research Center, Zhujiang Hospital, Southern Medical University, 253 Industrial Avenue, Guangzhou, 510280, China
| | - Sifei Chen
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100037, China
| | - Xinjie Xu
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100037, China.
| | - Shengkang Huang
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100037, China.
| | - Canzhao Liu
- Department of Cardiology, Laboratory of Heart Center, Heart Center, Translational Medicine Research Center, Zhujiang Hospital, Southern Medical University, 253 Industrial Avenue, Guangzhou, 510280, China.
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Fraccarollo D, Geffers R, Galuppo P, Bauersachs J. Mineralocorticoid receptor promotes cardiac macrophage inflammaging. Basic Res Cardiol 2024; 119:243-260. [PMID: 38329499 PMCID: PMC11008080 DOI: 10.1007/s00395-024-01032-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 12/21/2023] [Accepted: 01/03/2024] [Indexed: 02/09/2024]
Abstract
Inflammaging, a pro-inflammatory status that characterizes aging and primarily involving macrophages, is a master driver of age-related diseases. Mineralocorticoid receptor (MR) activation in macrophages critically regulates inflammatory and fibrotic processes. However, macrophage-specific mechanisms and the role of the macrophage MR for the regulation of inflammation and fibrotic remodeling in the aging heart have not yet been elucidated. Transcriptome profiling of cardiac macrophages from male/female young (4 months-old), middle (12 months-old) and old (18 and 24 months-old) mice revealed that myeloid cell-restricted MR deficiency prevents macrophage differentiation toward a pro-inflammatory phenotype. Pathway enrichment analysis showed that several biological processes related to inflammation and cell metabolism were modulated by the MR in aged macrophages. Further, transcriptome analysis of aged cardiac fibroblasts revealed that macrophage MR deficiency reduced the activation of pathways related to inflammation and upregulation of ZBTB16, a transcription factor involved in fibrosis. Phenotypic characterization of macrophages showed a progressive replacement of the TIMD4+MHC-IIneg/low macrophage population by TIMD4+MHC-IIint/high and TIMD4-MHC-IIint/high macrophages in the aging heart. By integrating cell sorting and transwell experiments with TIMD4+/TIMD4-macrophages and fibroblasts from old MRflox/MRLysMCre hearts, we showed that the inflammatory crosstalk between TIMD4- macrophages and fibroblasts may imply the macrophage MR and the release of mitochondrial superoxide anions. Macrophage MR deficiency reduced the expansion of the TIMD4- macrophage population and the emergence of fibrotic niches in the aging heart, thereby protecting against cardiac inflammation, fibrosis, and dysfunction. This study highlights the MR as an important mediator of cardiac macrophage inflammaging and age-related fibrotic remodeling.
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Affiliation(s)
- Daniela Fraccarollo
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg-Str.1 30625, Hannover, Germany.
| | - Robert Geffers
- Research Group Genome Analytics, Helmholtz Centre for Infection Research, Brunswick, Germany
| | - Paolo Galuppo
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg-Str.1 30625, Hannover, Germany
| | - Johann Bauersachs
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg-Str.1 30625, Hannover, Germany.
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Gao L, Zhao Y, Wu H, Lin X, Guo F, Li J, Long Y, Zhou B, She J, Zhang C, Sheng J, Jin L, Wu Y, Huang H. Polycystic Ovary Syndrome Fuels Cardiovascular Inflammation and Aggravates Ischemic Cardiac Injury. Circulation 2023; 148:1958-1973. [PMID: 37937441 PMCID: PMC10713005 DOI: 10.1161/circulationaha.123.065827] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 10/03/2023] [Indexed: 11/09/2023]
Abstract
BACKGROUND Reducing cardiovascular disease burden among women remains challenging. Epidemiologic studies have indicated that polycystic ovary syndrome (PCOS), the most common endocrine disease in women of reproductive age, is associated with an increased prevalence and extent of coronary artery disease. However, the mechanism through which PCOS affects cardiac health in women remains unclear. METHODS Prenatal anti-Müllerian hormone treatment or peripubertal letrozole infusion was used to establish mouse models of PCOS. RNA sequencing was performed to determine global transcriptomic changes in the hearts of PCOS mice. Flow cytometry and immunofluorescence staining were performed to detect myocardial macrophage accumulation in multiple PCOS models. Parabiosis models, cell-tracking experiments, and in vivo gene silencing approaches were used to explore the mechanisms underlying increased macrophage infiltration in PCOS mouse hearts. Permanent coronary ligation was performed to establish myocardial infarction (MI). Histologic analysis and small-animal imaging modalities (eg, magnetic resonance imaging and echocardiography) were performed to evaluate the effects of PCOS on injury after MI. Women with PCOS and control participants (n=200) were recruited to confirm findings observed in animal models. RESULTS Transcriptomic profiling and immunostaining revealed that hearts from PCOS mice were characterized by increased macrophage accumulation. Parabiosis studies revealed that monocyte-derived macrophages were significantly increased in the hearts of PCOS mice because of enhanced circulating Ly6C+ monocyte supply. Compared with control mice, PCOS mice showed a significant increase in splenic Ly6C+ monocyte output, associated with elevated hematopoietic progenitors in the spleen and sympathetic tone. Plasma norepinephrine (a sympathetic neurotransmitter) levels and spleen size were consistently increased in women with PCOS when compared with those in control participants, and norepinephrine levels were significantly correlated with circulating CD14++CD16- monocyte counts. Compared with animals without PCOS, PCOS animals showed significantly exacerbated atherosclerotic plaque development and post-MI cardiac remodeling. Conditional Vcam1 silencing in PCOS mice significantly suppressed cardiac inflammation and improved cardiac injury after MI. CONCLUSIONS Our data documented previously unrecognized mechanisms through which PCOS could affect cardiovascular health in women. PCOS may promote myocardial macrophage accumulation and post-MI cardiac remodeling because of augmented splenic myelopoiesis.
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Affiliation(s)
- Ling Gao
- Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, Fudan University, Shanghai, China (L.G., X.L., F.G., J.L., Y.L., B.Z., C.Z., L.J., Y.W., H.H.)
- Key Laboratory of Reproductive Genetics (Ministry of Education), Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China (L.G., H.W., J. She, H.H.)
| | - Yichao Zhao
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China (Y.Z.)
| | - Haiyan Wu
- Key Laboratory of Reproductive Genetics (Ministry of Education), Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China (L.G., H.W., J. She, H.H.)
| | - Xianhua Lin
- Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, Fudan University, Shanghai, China (L.G., X.L., F.G., J.L., Y.L., B.Z., C.Z., L.J., Y.W., H.H.)
| | - Fei Guo
- Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, Fudan University, Shanghai, China (L.G., X.L., F.G., J.L., Y.L., B.Z., C.Z., L.J., Y.W., H.H.)
| | - Jie Li
- Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, Fudan University, Shanghai, China (L.G., X.L., F.G., J.L., Y.L., B.Z., C.Z., L.J., Y.W., H.H.)
| | - Yuhang Long
- Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, Fudan University, Shanghai, China (L.G., X.L., F.G., J.L., Y.L., B.Z., C.Z., L.J., Y.W., H.H.)
| | - Bokang Zhou
- Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, Fudan University, Shanghai, China (L.G., X.L., F.G., J.L., Y.L., B.Z., C.Z., L.J., Y.W., H.H.)
| | - Junsen She
- Key Laboratory of Reproductive Genetics (Ministry of Education), Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China (L.G., H.W., J. She, H.H.)
| | - Chen Zhang
- Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, Fudan University, Shanghai, China (L.G., X.L., F.G., J.L., Y.L., B.Z., C.Z., L.J., Y.W., H.H.)
| | - Jianzhong Sheng
- International Institutes of Medicine, the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, China (J. Sheng, H.H.)
| | - Li Jin
- Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, Fudan University, Shanghai, China (L.G., X.L., F.G., J.L., Y.L., B.Z., C.Z., L.J., Y.W., H.H.)
- Research Units of Embryo Original Diseases, Chinese Academy of Medical Sciences (No. 2019RU056), Shanghai, China (L.J., Y.W., H.H.)
| | - Yanting Wu
- Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, Fudan University, Shanghai, China (L.G., X.L., F.G., J.L., Y.L., B.Z., C.Z., L.J., Y.W., H.H.)
- Research Units of Embryo Original Diseases, Chinese Academy of Medical Sciences (No. 2019RU056), Shanghai, China (L.J., Y.W., H.H.)
| | - Hefeng Huang
- Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, Fudan University, Shanghai, China (L.G., X.L., F.G., J.L., Y.L., B.Z., C.Z., L.J., Y.W., H.H.)
- Key Laboratory of Reproductive Genetics (Ministry of Education), Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China (L.G., H.W., J. She, H.H.)
- International Institutes of Medicine, the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, China (J. Sheng, H.H.)
- Research Units of Embryo Original Diseases, Chinese Academy of Medical Sciences (No. 2019RU056), Shanghai, China (L.J., Y.W., H.H.)
- State Key Laboratory of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, China (H.H.)
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Angelini A, Trial J, Saltzman AB, Malovannaya A, Cieslik KA. A defective mechanosensing pathway affects fibroblast-to-myofibroblast transition in the old male mouse heart. iScience 2023; 26:107283. [PMID: 37520701 PMCID: PMC10372839 DOI: 10.1016/j.isci.2023.107283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 05/12/2023] [Accepted: 06/30/2023] [Indexed: 08/01/2023] Open
Abstract
The cardiac fibroblast interacts with an extracellular matrix (ECM), enabling myofibroblast maturation via a process called mechanosensing. Although in the aging male heart, ECM is stiffer than in the young mouse, myofibroblast development is impaired, as demonstrated in 2-D and 3-D experiments. In old male cardiac fibroblasts, we found a decrease in actin polymerization, α-smooth muscle actin (α-SMA), and Kindlin-2 expressions, the latter an effector of the mechanosensing. When Kindlin-2 levels were manipulated via siRNA interference, young fibroblasts developed an old-like fibroblast phenotype, whereas Kindlin-2 overexpression in old fibroblasts reversed the defective phenotype. Finally, inhibition of overactivated extracellular regulated kinases 1 and 2 (ERK1/2) in the old male fibroblasts rescued actin polymerization and α-SMA expression. Pathological ERK1/2 overactivation was also attenuated by Kindlin-2 overexpression. In contrast, old female cardiac fibroblasts retained an operant mechanosensing pathway. In conclusion, we identified defective components of the Kindlin/ERK/actin/α-SMA mechanosensing axis in aged male fibroblasts.
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Affiliation(s)
- Aude Angelini
- Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - JoAnn Trial
- Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Alexander B. Saltzman
- Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX, USA
- Mass Spectrometry Proteomics Core, Baylor College of Medicine, Houston, TX, USA
| | - Anna Malovannaya
- Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX, USA
- Mass Spectrometry Proteomics Core, Baylor College of Medicine, Houston, TX, USA
| | - Katarzyna A. Cieslik
- Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
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Kuziel G, Moore BN, Haugstad GP, Arendt LM. Fibrocytes enhance mammary gland fibrosis in obesity. FASEB J 2023; 37:e23049. [PMID: 37342915 PMCID: PMC10316715 DOI: 10.1096/fj.202300399rr] [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: 03/02/2023] [Revised: 06/06/2023] [Accepted: 06/08/2023] [Indexed: 06/23/2023]
Abstract
Obesity rates continue to rise, and obese individuals are at higher risk for multiple types of cancer, including breast cancer. Obese mammary fat is a site of chronic, macrophage-driven inflammation, which enhances fibrosis within adipose tissue. Elevated fibrosis within the mammary gland may contribute to risk for obesity-associated breast cancer. To understand how inflammation due to obesity enhanced fibrosis within mammary tissue, we utilized a high-fat diet model of obesity and elimination of CCR2 signaling in mice to identify changes in immune cell populations and their impact on fibrosis. We observed that obesity increased a population of CD11b+ cells with the ability to form myofibroblast-like colonies in vitro. This population of CD11b+ cells is consistent with fibrocytes, which have been identified in wound healing and chronic inflammatory diseases but have not been examined in obesity. In CCR2-null mice, which have limited ability to recruit myeloid lineage cells into obese adipose tissue, we observed reduced mammary fibrosis and diminished fibrocyte colony formation in vitro. Transplantation of myeloid progenitor cells, which are the cells of origin for fibrocytes, into the mammary glands of obese CCR2-null mice resulted in significantly increased myofibroblast formation. Gene expression analyses of the myeloid progenitor cell population from obese mice demonstrated enrichment for genes associated with collagen biosynthesis and extracellular matrix remodeling. Together these results show that obesity enhances recruitment of fibrocytes to promote obesity-induced fibrosis in the mammary gland.
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Affiliation(s)
- Genevra Kuziel
- Cancer Biology Program, University of Wisconsin-Madison,
Madison WI 53706, U.S.A
| | - Brittney N. Moore
- Department of Comparative Biosciences, University of
Wisconsin-Madison, Madison WI 53706, U.S.A
| | - Grace P. Haugstad
- Department of Comparative Biosciences, University of
Wisconsin-Madison, Madison WI 53706, U.S.A
| | - Lisa M. Arendt
- Cancer Biology Program, University of Wisconsin-Madison,
Madison WI 53706, U.S.A
- Department of Comparative Biosciences, University of
Wisconsin-Madison, Madison WI 53706, U.S.A
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Wang J, Cai E, An X, Wang J. Ginaton reduces M1-polarized macrophages in hypertensive cardiac remodeling via NF-κB signaling. Front Pharmacol 2023; 14:1104871. [PMID: 36992835 PMCID: PMC10040779 DOI: 10.3389/fphar.2023.1104871] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 02/23/2023] [Indexed: 03/16/2023] Open
Abstract
Introduction: Macrophages play a critical role in cardiac remodeling, and dysregulated macrophage polarization between the proinflammatory M1 and anti-inflammatory M2 phenotypes promotes excessive inflammation and cardiac damage. Ginaton is a natural extract extracted from Ginkgo biloba. Because of its anti-inflammatory properties, it has long been used to treat a variety of diseases. However, the role of Ginaton in modulating the diverse macrophage functional phenotypes brought on by Ang II-induced hypertension and cardiac remodeling is unknown.Methods: In the present study, we fed C57BL/6J mice in the age of eight weeks with Ginaton (300 mg/kg/day) or PBS control, and then injected Ang II (1000 ng/kg/min) or saline for 14 days to investigate the specific efficacy of Ginaton. Systolic blood pressure was recorded, cardiac function was detected by echocardiography, and pathological changes in cardiac tissue were assessed by histological staining. Different functional phenotypes of the macrophages were assessed by immunostaining. The mRNA expression of genes was assessed by qPCR analysis. Protein levels were detected by immunoblotting.Results: Our results showed that Ang II infusion significantly enhanced the activation and infiltration of macrophages with hypertension, cardiac insufficiency, myocardial hypertrophy, fibrosis and M1 phenotype macrophages compared with the saline group. Instead, Ginaton attenuated these effects. In addition, in vitro experiments showed that Ginaton inhibited Ang II-induced activation, adhesion and migration of M1 phenotype macrophages.Conclusion: Our study showed that Ginaton treatment inhibits Ang II-induced M1 phenotype macrophage activation, macrophage adhesion, and mitigation, as well as the inflammatory response leading to impaired and dysfunctional hypertension and cardiac remodeling. Gianton may be a powerful treatment for heart disease.
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Affiliation(s)
- Jie Wang
- Department of Cardiology, Affiliated Zhongshan Hospital of Dalian University, Dalian, China
| | - Enze Cai
- Department of Cardiology, the Fifth People’s Hospital of Dalian, Dalian, China
| | - Xiangbo An
- Department of Interventional Therapy, First Affiliated Hospital of Dalian Medical University, Dalian, China
- *Correspondence: Xiangbo An, ; Junjie Wang,
| | - Junjie Wang
- Department of Cardiology, First Affiliated Hospital of Dalian Medical University, Dalian, China
- *Correspondence: Xiangbo An, ; Junjie Wang,
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Lei W, Jia L, Wang Z, Liang Z, Aizhen Z, Liu Y, Tian Y, Zhao L, Chen Y, Shi G, Yang Z, Yang Y, Xu X. CC chemokines family in fibrosis and aging: From mechanisms to therapy. Ageing Res Rev 2023; 87:101900. [PMID: 36871782 DOI: 10.1016/j.arr.2023.101900] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 02/21/2023] [Accepted: 03/02/2023] [Indexed: 03/07/2023]
Abstract
Fibrosis is a universal aging-related pathological process in the different organ, but is actually a self-repair excessive response. To date, it still remains a large unmet therapeutic need to restore injured tissue architecture without detrimental side effects, due to the limited clinical success in the treatment of fibrotic disease. Although specific organ fibrosis and the associated triggers have distinct pathophysiological and clinical manifestations, they often share involved cascades and common traits, including inflammatory stimuli, endothelial cell injury, and macrophage recruitment. These pathological processes can be widely controlled by a kind of cytokines, namely chemokines. Chemokines act as a potent chemoattractant to regulate cell trafficking, angiogenesis, and extracellular matrix (ECM). Based on the position and number of N-terminal cysteine residues, chemokines are divided into four groups: the CXC group, the CX3C group, the (X)C group, and the CC group. The CC chemokine classes (28 members) is the most numerous and diverse subfamily of the four chemokine groups. In this Review, we summarized the latest advances in the understanding of the importance of CC chemokine in the pathogenesis of fibrosis and aging and discussed potential clinical therapeutic strategies and perspectives aimed at resolving excessive scarring formation.
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Affiliation(s)
- Wangrui Lei
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education. Faculty of Life Sciences and Medicine, Northwest University, Xi'an, 710069, China
| | - Liyuan Jia
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education. Faculty of Life Sciences and Medicine, Northwest University, Xi'an, 710069, China
| | - Zheng Wang
- Department of Cardiothoracic Surgery, Central Theater Command General Hospital of Chinese People's Liberation Army, Wuhan, 430064, China
| | - Zhenxing Liang
- Department of Cardiothoracic Surgery, The First Affiliated Hospital of Zhengzhou University, 1 Jianshe East, Zhengzhou 450052, China
| | - Zhao Aizhen
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education. Faculty of Life Sciences and Medicine, Northwest University, Xi'an, 710069, China
| | - Yanqing Liu
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education. Faculty of Life Sciences and Medicine, Northwest University, Xi'an, 710069, China
| | - Ye Tian
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education. Faculty of Life Sciences and Medicine, Northwest University, Xi'an, 710069, China
| | - Lin Zhao
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, 710032, China
| | - Yawu Chen
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, 710032, China
| | - Guangyong Shi
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, 710032, China
| | - Zhi Yang
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, 710032, China
| | - Yang Yang
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education. Faculty of Life Sciences and Medicine, Northwest University, Xi'an, 710069, China.
| | - Xuezeng Xu
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, 710032, China.
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Early Development of Cardiac Fibrosis in Young Old-Father Offspring. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:8770136. [PMID: 36193084 PMCID: PMC9526616 DOI: 10.1155/2022/8770136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 09/06/2022] [Indexed: 11/29/2022]
Abstract
Cardiac aging is characterized by progressive fibrosis. Epidemiological studies have found that advanced paternal age is associated with an increased risk of heart failure in the next generation. This study is aimed at evaluating the effect of paternal age, in the young male rat progeny, on cardiac phenotype under circulatory stress conditions. Offspring rats were obtained by mating old males (24 months old) with young females (two months old) and by mating young males (two months old) with the same young females. Hypertension was induced in old father offspring (OFO) rats and young old father (YFO) offspring rats using L-NAME (N(ω)-nitro-L-arginine methyl ester). The OFO L-NAME rats showed a high blood pressure phenotype associated with substantial cardiac hypertrophy and an exacerbation of cardiac fibrosis compared to the YFO L-NAME rats. Histological analysis of heart tissue showed an expansion of the extracellular matrix, with fibroblasts displaying markers of epicardial origin (Tcf21, Tbx18, and Wt1) in the OFO group. Moreover, western blot and protein phosphorylation antibody array identified the TGF-β2 receptor pathway as preferentially activated in aged hearts as well as in OFO cardiac tissue treated with L-NAME. In addition, old father offspring rats (OFO+OFO L-NAME) had increased cardiac DNA methylation. In young hypertensive progeny, advanced paternal age at conception may be a risk factor for early progression towards cardiac fibrosis. An intergenerational transmission may be behind the paternal age-related cardiac remodeling in the young offspring.
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10
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Reinhardt JW, Breuer CK. Fibrocytes: A Critical Review and Practical Guide. Front Immunol 2021; 12:784401. [PMID: 34975874 PMCID: PMC8718395 DOI: 10.3389/fimmu.2021.784401] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 11/30/2021] [Indexed: 01/18/2023] Open
Abstract
Fibrocytes are hematopoietic-derived cells that directly contribute to tissue fibrosis by producing collagen following injury, during disease, and with aging. The lack of a fibrocyte-specific marker has led to the use of multiple strategies for identifying these cells in vivo. This review will detail how past studies were performed, report their findings, and discuss their strengths and limitations. The motivation is to identify opportunities for further investigation and promote the adoption of best practices during future study design.
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Affiliation(s)
- James W. Reinhardt
- Center for Regenerative Medicine, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH, United States
| | - Christopher K. Breuer
- Center for Regenerative Medicine, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH, United States
- Department of Surgery, The Ohio State University Wexner Medical Center, Columbus, OH, United States
- Department of Surgery, Nationwide Children’s Hospital, Columbus, OH, United States
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11
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Trial J, Diaz Lankenau R, Angelini A, Tovar Perez JE, Taffet GE, Entman ML, Cieslik KA. Treatment with a DC-SIGN ligand reduces macrophage polarization and diastolic dysfunction in the aging female but not male mouse hearts. GeroScience 2021; 43:881-899. [PMID: 32851570 PMCID: PMC8110645 DOI: 10.1007/s11357-020-00255-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 08/13/2020] [Indexed: 12/18/2022] Open
Abstract
Cardiac diastolic dysfunction in aging arises from increased ventricular stiffness caused by inflammation and interstitial fibrosis. The diastolic dysfunction contributes to heart failure with preserved ejection fraction (HFpEF), which in the aging population is more common in women. This report examines its progression over 12 weeks in aging C57BL/6J mice and correlates its development with changes in macrophage polarization and collagen deposition.Aged C57BL/6J mice were injected with dendritic cell-specific intercellular adhesion molecule-3-grabbing nonintegrin (DC-SIGN) ligand 1 (DCSL1, an anti-inflammatory agent) or saline for 12 weeks. Echo and Doppler measurements were performed before and after 4 and 12 weeks of treatment. DCSL1 prevented the worsening of diastolic dysfunction over time in females but not in males. Cardiac single cell suspensions analyzed by flow cytometry revealed changes in the inflammatory infiltrate: (1) in males, there was an increased total number of leukocytes with an increased pro-inflammatory profile compared with females and they did not respond to DCSL1; (2) by contrast, DCSL1 treatment resulted in a shift in macrophage polarization to an anti-inflammatory phenotype in females. Notably, DCSL1 preferentially targeted tumor necrosis factor-α (TNFα+) pro-inflammatory macrophages. The reduction in pro-inflammatory macrophage polarization was accompanied by a decrease in collagen content in the heart.Age-associated diastolic dysfunction in mice is more severe in females and is associated with unique changes in macrophage polarization in cardiac tissue. Treatment with DCSL1 mitigates the changes in inflammation, cardiac function, and fibrosis. The characteristics of diastolic dysfunction in aging female mice mimic similar changes in aging women.
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Affiliation(s)
- JoAnn Trial
- Department of Medicine, Cardiovascular Research, Baylor College of Medicine, One Baylor Plaza, MS: BCM 620, Houston, TX, 77030, USA
| | - Rodrigo Diaz Lankenau
- Department of Medicine, Cardiovascular Research, Baylor College of Medicine, One Baylor Plaza, MS: BCM 620, Houston, TX, 77030, USA
| | - Aude Angelini
- Department of Medicine, Cardiovascular Research, Baylor College of Medicine, One Baylor Plaza, MS: BCM 620, Houston, TX, 77030, USA
| | - Jorge E Tovar Perez
- Department of Medicine, Cardiovascular Research, Baylor College of Medicine, One Baylor Plaza, MS: BCM 620, Houston, TX, 77030, USA
- Texas A&M University, 2121 W. Holcombe Blvd, Houston, TX, 77030, USA
| | - George E Taffet
- Department of Medicine, Cardiovascular Research, Baylor College of Medicine, One Baylor Plaza, MS: BCM 620, Houston, TX, 77030, USA
- The DeBakey Heart Center, Houston Methodist Hospital, 6565 Fannin Street, Houston, TX, 77030, USA
| | - Mark L Entman
- Department of Medicine, Cardiovascular Research, Baylor College of Medicine, One Baylor Plaza, MS: BCM 620, Houston, TX, 77030, USA
- The DeBakey Heart Center, Houston Methodist Hospital, 6565 Fannin Street, Houston, TX, 77030, USA
| | - Katarzyna A Cieslik
- Department of Medicine, Cardiovascular Research, Baylor College of Medicine, One Baylor Plaza, MS: BCM 620, Houston, TX, 77030, USA.
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12
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Abstract
Myocardial fibrosis, the expansion of the cardiac interstitium through deposition of extracellular matrix proteins, is a common pathophysiologic companion of many different myocardial conditions. Fibrosis may reflect activation of reparative or maladaptive processes. Activated fibroblasts and myofibroblasts are the central cellular effectors in cardiac fibrosis, serving as the main source of matrix proteins. Immune cells, vascular cells and cardiomyocytes may also acquire a fibrogenic phenotype under conditions of stress, activating fibroblast populations. Fibrogenic growth factors (such as transforming growth factor-β and platelet-derived growth factors), cytokines [including tumour necrosis factor-α, interleukin (IL)-1, IL-6, IL-10, and IL-4], and neurohumoral pathways trigger fibrogenic signalling cascades through binding to surface receptors, and activation of downstream signalling cascades. In addition, matricellular macromolecules are deposited in the remodelling myocardium and regulate matrix assembly, while modulating signal transduction cascades and protease or growth factor activity. Cardiac fibroblasts can also sense mechanical stress through mechanosensitive receptors, ion channels and integrins, activating intracellular fibrogenic cascades that contribute to fibrosis in response to pressure overload. Although subpopulations of fibroblast-like cells may exert important protective actions in both reparative and interstitial/perivascular fibrosis, ultimately fibrotic changes perturb systolic and diastolic function, and may play an important role in the pathogenesis of arrhythmias. This review article discusses the molecular mechanisms involved in the pathogenesis of cardiac fibrosis in various myocardial diseases, including myocardial infarction, heart failure with reduced or preserved ejection fraction, genetic cardiomyopathies, and diabetic heart disease. Development of fibrosis-targeting therapies for patients with myocardial diseases will require not only understanding of the functional pluralism of cardiac fibroblasts and dissection of the molecular basis for fibrotic remodelling, but also appreciation of the pathophysiologic heterogeneity of fibrosis-associated myocardial disease.
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Affiliation(s)
- Nikolaos G Frangogiannis
- Department of Medicine (Cardiology), The Wilf Family Cardiovascular Research Institute, Albert Einstein College of Medicine, 1300 Morris Park Avenue Forchheimer G46B, Bronx, NY 10461, USA
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13
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Mechanosensing dysregulation in the fibroblast: A hallmark of the aging heart. Ageing Res Rev 2020; 63:101150. [PMID: 32846223 DOI: 10.1016/j.arr.2020.101150] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 08/03/2020] [Accepted: 08/14/2020] [Indexed: 12/16/2022]
Abstract
The myofibroblast is a specialized fibroblast that expresses α-smooth muscle actin (α-SMA) and participates in wound contraction and fibrosis. The fibroblast to myofibroblast transition depends on chemical and mechanical signals. A fibroblast senses the changes in the environment (extracellular matrix (ECM)) and transduces these changes to the cytoskeleton and the nucleus, resulting in activation or inhibition of α-SMA transcription in a process called mechanosensing. A stiff matrix greatly facilitates the transition from fibroblast to myofibroblast, and although the aging heart is much stiffer than the young one, the aging fibroblast has difficulties in transitioning into the contractile phenotype. This suggests that the events occurring downstream of the matrix, such as activation or changes in expression levels of various proteins participating in mechanotransduction can negatively alter the ability of the aging fibroblast to become a myofibroblast. In this review, we will discuss in detail the changes in ECM, receptors (integrin or non-integrin), focal adhesions, cytoskeleton, and transcription factors involved in mechanosensing that occur with aging.
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14
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Abstract
Heart failure exhibits remarkable pathophysiologic heterogeneity. A large body of evidence suggests that regardless of the underlying etiology, heart failure is associated with induction of cytokines and chemokines that may contribute to the pathogenesis of adverse remodeling, and systolic and diastolic dysfunction. The pro-inflammatory cytokines tumor necrosis factor (TNF)-α, interleukin (IL)-1, and IL-6 have been extensively implicated in the pathogenesis of heart failure. Inflammatory cytokines modulate phenotype and function of all myocardial cells, suppressing contractile function in cardiomyocytes, inducing inflammatory activation in macrophages, stimulating microvascular inflammation and dysfunction, and promoting a matrix-degrading phenotype in fibroblasts. Moreover, cytokine-induced growth factor synthesis may exert chronic fibrogenic actions contributing to the pathogenesis of heart failure with preserved ejection fraction (HFpEF). In addition to their role in adverse cardiac remodeling, some inflammatory cytokines may also exert protective actions on cardiomyocytes under conditions of stress. Chemokines, such as CCL2, are also upregulated in failing hearts and may stimulate recruitment of pro-inflammatory leukocytes, promoting myocardial injury, fibrotic remodeling, and dysfunction. Although experimental evidence suggests that cytokine and chemokine targeting may hold therapeutic promise in heart failure, clinical translation remains challenging. This review manuscript summarizes our knowledge on the role of TNF-α, IL-1, IL-6, and CCL2 in the pathogenesis of heart failure, and discusses the promises and challenges of targeted anti-cytokine therapy. Dissection of protective and maladaptive cellular actions of cytokines in the failing heart, and identification of patient subsets with overactive or dysregulated myocardial inflammatory responses are required for design of successful therapeutic approaches.
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15
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He M, Zhao WB, Nguyen MN, Kiriazis H, Li YQ, Hu H, Du XJ. Association between heart rate variability indices and features of spontaneous ventricular tachyarrhythmias in mice. Clin Exp Pharmacol Physiol 2020; 47:1193-1202. [PMID: 32027390 DOI: 10.1111/1440-1681.13275] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 02/02/2020] [Accepted: 02/03/2020] [Indexed: 12/20/2022]
Abstract
Direct evidence is limited for the association between heart rate variability (HRV) indices and ventricular tachyarrhythmias (VTAs). While galectin-3 (Gal-3) is regarded as a causal factor for cardiac remodelling and a biomarker for arrhythmias, its regulation on VTAs and HVR is unknown. Using aged transgenic (TG) mice with cardiac overexpression of β2 -adrenoceptors and spontaneous VTAs, we studied whether changes in HRV indices correlated with the severity of VTAs, and whether Gal-3 gene knockout (KO) in TG mice might limit VTA. Body-surface ECG was recorded (10-minute period) in 9- to 10-month-old mice of non-transgenic (nTG), TG and TG × Gal-3 knockout (TG/KO). Time-domain, frequency-domain and nonlinear-domain HRV indices were calculated using the R-R intervals extracted from ECG signals and compared with frequency of VTAs. TG and TG/KO mice developed frequent VTAs and showed significant changes in certain time-domain and nonlinear-domain HRV indices relative to nTG mice. The severity of VTAs in TG and TG/KO mice in combination, estimated by VTA counts and arrhythmia score, was significantly correlated with certain time-domain and nonlinear-domain HRV indices. In conclusion, significant changes in HRV indices were evident and correlated with the severity of spontaneous VTAs in TG mice. The frequency of VTA and HRV indices were largely comparable between TG and TG/KO mice. Deletion of Gal-3 in TG mice altered certain HRV indices implying influence by neuronally localized Gal-3 on autonomic nervous activity.
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Affiliation(s)
- Mi He
- Department of Cardiology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
- School of Biomedical Engineering and Imaging Medicine, Third Military Medical University (Army Medical University), Chongqing, China
| | - Wei-Bo Zhao
- Department of Cardiology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - My-Nhan Nguyen
- Experimental Cardiology Laboratory, Baker Heart and Diabetes Institute, Melbourne, Vic, Australia
| | - Helen Kiriazis
- Experimental Cardiology Laboratory, Baker Heart and Diabetes Institute, Melbourne, Vic, Australia
| | - Yong-Qin Li
- School of Biomedical Engineering and Imaging Medicine, Third Military Medical University (Army Medical University), Chongqing, China
| | - Houyuan Hu
- Department of Cardiology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Xiao-Jun Du
- Experimental Cardiology Laboratory, Baker Heart and Diabetes Institute, Melbourne, Vic, Australia
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University (Health Science Center), Xi'an, China
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16
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Differential Gender-Dependent Patterns of Cardiac Fibrosis and Fibroblast Phenotypes in Aging Mice. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:8282157. [PMID: 32566103 PMCID: PMC7267867 DOI: 10.1155/2020/8282157] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 04/02/2020] [Accepted: 04/08/2020] [Indexed: 01/08/2023]
Abstract
Aging is characterized by physiological changes within the heart leading to fibrosis and dysfunction even in individuals without underlying pathologies. Gender has been shown to influence the characteristics of cardiac aging; however, gender-dependent cardiac fibrosis occurring with age remains largely not elucidated. Thus, broadening our understanding of this phenomenon proves necessary in order to develop novel anti-fibrotic strategies in the elderly. In this study, we aim to characterize cardiac fibrosis and cardiac fibroblast (CF) populations in aged male and female mice. Echocardiography revealed eccentric hypertrophy with left ventricular dilatation in the aged male versus concentric hypertrophy with left posterior wall thickening in the female, with preserved cardiac function in both groups. Reactive fibrosis was evidenced in the myocardium and epicardium of the aged female mice hearts whereas perivascular and replacement ones where present in the male heart. Collagen I was predominant in the aged male heart whereas collagen III was the main component in the female heart. CFs in the aged male heart were mainly recruited from resident PDGFRα+ populations but not derived from epicardium as evidenced by the absence of epicardial progenitor transcription factors Tcf21, Tbx18 and Wt1. Our results present a paradigm for gender-dependent cardiac fibrosis and the origins of CFs with age. This sets forth to revisit cardiac anti-fibrotic management according to the gender in the elderly and to explore novel therapeutic targets.
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17
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Bajaj NS, Kalra R, Gupta K, Aryal S, Rajapreyar I, Lloyd SG, McConathy J, Shah SJ, Prabhu SD. Leucocyte count predicts cardiovascular risk in heart failure with preserved ejection fraction: insights from TOPCAT Americas. ESC Heart Fail 2020; 7:1676-1687. [PMID: 32424980 PMCID: PMC7373916 DOI: 10.1002/ehf2.12724] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 03/29/2020] [Accepted: 03/31/2020] [Indexed: 01/01/2023] Open
Abstract
AIMS Prior evidence has implicated leucocyte expansion in several cardiovascular disorders, including heart failure (HF) with reduced ejection fraction (rEF). However, the prognostic importance of leucocyte count in HF with preserved EF (HFpEF) remains largely unexplored. METHODS AND RESULTS The Americas cohort of the treatment of preserved cardiac function heart failure with an aldosterone antagonist (TOPCAT-Americas) was used to evaluate the association between total leucocyte count and clinical outcomes in HFpEF. The primary outcome was a composite of aborted cardiac arrest, cardiovascular mortality, or hospitalization for HF. Secondary outcomes were hospitalization for HF, aborted cardiac arrest, stroke, non-fatal myocardial infarction (MI), cardiovascular mortality, non-cardiovascular mortality, and all-cause mortality. Survival models were used to identify the risk of the primary and secondary outcomes in those with leucocyte count above the median (7100 cells/μL), as compared to those with leucocyte count below the median, during the follow-up period. A total of 1746 (out of 1767; 99%) patients from TOPCAT-Americas were available for the analyses with a median follow up of 2.4 (25th to 75th percentile 1.4-3.9) years. Patients with leucocyte count >7100 cells/μL were 36% more likely to experience the primary endpoint compared to those with ≤7100 cells/μL (hazard ratio: 1.36, 95% confidence interval: 1.14-1.61). This association remained significant after extensive adjustment for potential confounders (hazard ratio: 1.27, 95% confidence interval: 1.06-1.52). We also observed a greater incidence of HF hospitalization and non-fatal MI in patients with higher leucocyte count. These associations remained robust on sensitivity analyses, suggesting a low probability of confounding. Exploratory analyses suggested that both higher leucocyte count (integrating the combined influence of both myeloid and lymphoid immune cells) and augmented platelet count (as a surrogate for myeloid immune cell expansion) in the same model were associated with the primary outcome (both P < 0.05). CONCLUSIONS Leucocyte count >7100 cells/μL was independently associated with adverse clinical outcomes in HFpEF patients from TOPCAT-Americas. These results were primarily driven by the HF hospitalization outcome but were also accompanied by an excess of non-fatal MI. Further research is needed to define the mechanisms underlying our findings and their prognostic implications.
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Affiliation(s)
- Navkaranbir S. Bajaj
- Division of Cardiovascular Disease and Comprehensive Cardiovascular Center, Department of Internal MedicineUniversity of Alabama at BirminghamUSA,Division of Molecular Imaging and Therapeutics, Department of RadiologyUniversity of Alabama at BirminghamBirminghamALUSA,Birmingham VA Medical Center, Departments of Internal Medicine and RadiologyUniversity of Alabama at BirminghamBirminghamALUSA
| | - Rajat Kalra
- Cardiology DivisionUniversity of MinnesotaMinneapolisMNUSA
| | - Kartik Gupta
- Division of Cardiovascular Disease and Comprehensive Cardiovascular Center, Department of Internal MedicineUniversity of Alabama at BirminghamUSA
| | - Sudeep Aryal
- Division of Cardiovascular Disease and Comprehensive Cardiovascular Center, Department of Internal MedicineUniversity of Alabama at BirminghamUSA
| | - Indranee Rajapreyar
- Division of Cardiovascular Disease and Comprehensive Cardiovascular Center, Department of Internal MedicineUniversity of Alabama at BirminghamUSA
| | - Steven G. Lloyd
- Division of Cardiovascular Disease and Comprehensive Cardiovascular Center, Department of Internal MedicineUniversity of Alabama at BirminghamUSA
| | - Jonathan McConathy
- Division of Molecular Imaging and Therapeutics, Department of RadiologyUniversity of Alabama at BirminghamBirminghamALUSA
| | - Sanjiv J. Shah
- Division of Cardiology, Department of MedicineNorthwestern University Feinberg School of MedicineChicagoILUSA
| | - Sumanth D. Prabhu
- Division of Cardiovascular Disease and Comprehensive Cardiovascular Center, Department of Internal MedicineUniversity of Alabama at BirminghamUSA
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18
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Mouton AJ, Li X, Hall ME, Hall JE. Obesity, Hypertension, and Cardiac Dysfunction: Novel Roles of Immunometabolism in Macrophage Activation and Inflammation. Circ Res 2020; 126:789-806. [PMID: 32163341 PMCID: PMC7255054 DOI: 10.1161/circresaha.119.312321] [Citation(s) in RCA: 277] [Impact Index Per Article: 69.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Obesity and hypertension, which often coexist, are major risk factors for heart failure and are characterized by chronic, low-grade inflammation, which promotes adverse cardiac remodeling. While macrophages play a key role in cardiac remodeling, dysregulation of macrophage polarization between the proinflammatory M1 and anti-inflammatory M2 phenotypes promotes excessive inflammation and cardiac injury. Metabolic shifting between glycolysis and mitochondrial oxidative phosphorylation has been implicated in macrophage polarization. M1 macrophages primarily rely on glycolysis, whereas M2 macrophages rely on the tricarboxylic acid cycle and oxidative phosphorylation; thus, factors that affect macrophage metabolism may disrupt M1/M2 homeostasis and exacerbate inflammation. The mechanisms by which obesity and hypertension may synergistically induce macrophage metabolic dysfunction, particularly during cardiac remodeling, are not fully understood. We propose that obesity and hypertension induce M1 macrophage polarization via mechanisms that directly target macrophage metabolism, including changes in circulating glucose and fatty acid substrates, lipotoxicity, and tissue hypoxia. We discuss canonical and novel proinflammatory roles of macrophages during obesity-hypertension-induced cardiac injury, including diastolic dysfunction and impaired calcium handling. Finally, we discuss the current status of potential therapies to target macrophage metabolism during heart failure, including antidiabetic therapies, anti-inflammatory therapies, and novel immunometabolic agents.
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Affiliation(s)
- Alan J. Mouton
- Department of Physiology and Biophysics, University of Mississippi Medical Center, 2500 North State Street; Jackson, MS, 39216-4505
- Mississippi Center for Obesity Research, University of Mississippi Medical Center, 2500 North State Street; Jackson, MS, 39216-4505
| | - Xuan Li
- Department of Physiology and Biophysics, University of Mississippi Medical Center, 2500 North State Street; Jackson, MS, 39216-4505
- Mississippi Center for Obesity Research, University of Mississippi Medical Center, 2500 North State Street; Jackson, MS, 39216-4505
| | - Michael E. Hall
- Department of Physiology and Biophysics, University of Mississippi Medical Center, 2500 North State Street; Jackson, MS, 39216-4505
- Department of Medicine, University of Mississippi Medical Center, 2500 North State Street; Jackson, MS, 39216-4505
- Mississippi Center for Obesity Research, University of Mississippi Medical Center, 2500 North State Street; Jackson, MS, 39216-4505
| | - John E. Hall
- Department of Physiology and Biophysics, University of Mississippi Medical Center, 2500 North State Street; Jackson, MS, 39216-4505
- Mississippi Center for Obesity Research, University of Mississippi Medical Center, 2500 North State Street; Jackson, MS, 39216-4505
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19
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Vidal R, Wagner JUG, Braeuning C, Fischer C, Patrick R, Tombor L, Muhly-Reinholz M, John D, Kliem M, Conrad T, Guimarães-Camboa N, Harvey R, Dimmeler S, Sauer S. Transcriptional heterogeneity of fibroblasts is a hallmark of the aging heart. JCI Insight 2019; 4:131092. [PMID: 31723062 DOI: 10.1172/jci.insight.131092] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 10/02/2019] [Indexed: 12/27/2022] Open
Abstract
Aging is a major risk factor for cardiovascular disease. Although the impact of aging has been extensively studied, little is known regarding the aging processes in cells of the heart. Here we analyzed the transcriptomes of hearts of 12-week-old and 18-month-old mice by single-nucleus RNA-sequencing. Among all cell types, aged fibroblasts showed most significant differential gene expression, increased RNA dynamics, and network entropy. Aged fibroblasts exhibited significantly changed expression patterns of inflammatory, extracellular matrix organization angiogenesis, and osteogenic genes. Functional analyses indicated deterioration of paracrine signatures between fibroblasts and endothelial cells in old hearts. Aged heart-derived fibroblasts had impaired endothelial cell angiogenesis and autophagy and augmented proinflammatory response. In particular, expression of Serpine1 and Serpine2 were significantly increased and secreted by old fibroblasts to exert antiangiogenic effects on endothelial cells, an effect that could be significantly prevented by using neutralizing antibodies. Moreover, we found an enlarged subpopulation of aged fibroblasts expressing osteoblast genes in the epicardial layer associated with increased calcification. Taken together this study provides system-wide insights and identifies molecular changes of aging cardiac fibroblasts, which may contribute to declined heart function.
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Affiliation(s)
- Ramon Vidal
- Max Delbrück Center for Molecular Medicine, Berlin, Germany.,Berlin Institute of Health, Berlin, Germany
| | - Julian Uwe Gabriel Wagner
- Faculty for Biological Sciences and.,Institute for Cardiovascular Regeneration, Goethe University Frankfurt, Frankfurt, Germany
| | | | | | - Ralph Patrick
- Developmental and Stem Cell Biology Division, Victor Chang Cardiac Research Institute, Darlinghurst, New South Wales, Australia.,St. Vincent's Clinical School, University of New South Wales Sydney, Kensington, New South Wales, Australia
| | - Lukas Tombor
- Institute for Cardiovascular Regeneration, Goethe University Frankfurt, Frankfurt, Germany
| | - Marion Muhly-Reinholz
- Institute for Cardiovascular Regeneration, Goethe University Frankfurt, Frankfurt, Germany
| | - David John
- Institute for Cardiovascular Regeneration, Goethe University Frankfurt, Frankfurt, Germany
| | - Magdalena Kliem
- Max Delbrück Center for Molecular Medicine, Berlin, Germany.,Berlin Institute of Health, Berlin, Germany
| | - Thomas Conrad
- Max Delbrück Center for Molecular Medicine, Berlin, Germany
| | - Nuno Guimarães-Camboa
- Institute for Cardiovascular Regeneration, Goethe University Frankfurt, Frankfurt, Germany.,Cardiopulmonary Institute, Goethe University Frankfurt, Frankfurt, Germany
| | - Richard Harvey
- Developmental and Stem Cell Biology Division, Victor Chang Cardiac Research Institute, Darlinghurst, New South Wales, Australia.,St. Vincent's Clinical School, University of New South Wales Sydney, Kensington, New South Wales, Australia.,School of Biotechnology and Biomolecular Science, University of New South Wales Sydney, Kensington, New South Wales, Australia
| | - Stefanie Dimmeler
- Faculty for Biological Sciences and.,Developmental and Stem Cell Biology Division, Victor Chang Cardiac Research Institute, Darlinghurst, New South Wales, Australia.,Cardiopulmonary Institute, Goethe University Frankfurt, Frankfurt, Germany
| | - Sascha Sauer
- Max Delbrück Center for Molecular Medicine, Berlin, Germany.,Berlin Institute of Health, Berlin, Germany.,German Centre for Cardiovascular Research, Berlin, Germany
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20
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Cieslik KA, Sekhar RV, Granillo A, Reddy A, Medrano G, Heredia CP, Entman ML, Hamilton DJ, Li S, Reineke E, Gupte AA, Zhang A, Taffet GE. Improved Cardiovascular Function in Old Mice After N-Acetyl Cysteine and Glycine Supplemented Diet: Inflammation and Mitochondrial Factors. J Gerontol A Biol Sci Med Sci 2019. [PMID: 29538624 DOI: 10.1093/gerona/gly034] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Metabolic, inflammatory, and functional changes occur in cardiovascular aging which may stem from oxidative stress and be remediable with antioxidants. Glutathione, an intracellular antioxidant, declines with aging, and supplementation with glutathione precursors, N-acetyl cysteine (NAC) and glycine (Gly), increases tissue glutathione. Thirty-month old mice were fed diets supplemented with NAC or NAC+Gly and, after 7 weeks, cardiac function and molecular studies were performed. The NAC+Gly supplementation improved diastolic function, increasing peak early filling velocity, and reducing relaxation time, left atrial volume, and left ventricle end diastolic pressure. By contrast, cardiac function did not improve with NAC alone. Both diet supplementations decreased cardiac levels of inflammatory mediators; only NAC+Gly reduced leukocyte infiltration. Several mitochondrial genes reduced with aging were upregulated in hearts by NAC+Gly diet supplementation. These Krebs cycle and oxidative phosphorylation enzymes, suggesting improved mitochondrial function, and permeabilized cardiac fibers from NAC+Gly-fed mice produced ATP from carbohydrate and fatty acid sources, whereas fibers from control old mice were less able to utilize fatty acids. Our data indicate that NAC+Gly supplementation can improve diastolic function in the old mouse and may have potential to prevent important morbidities for older people.
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Affiliation(s)
- Katarzyna A Cieslik
- Division of Cardiovascular Sciences and the DeBakey Heart Center, Department of Medicine, Baylor College of Medicine, Houston, Texas
| | - Rajagopal V Sekhar
- Division of Diabetes, Endocrinology and Metabolism, Baylor College of Medicine, Houston, Texas
| | - Alejandro Granillo
- Division of Cardiovascular Sciences and the DeBakey Heart Center, Department of Medicine, Baylor College of Medicine, Houston, Texas
| | - Anilkumar Reddy
- Division of Cardiovascular Sciences and the DeBakey Heart Center, Department of Medicine, Baylor College of Medicine, Houston, Texas.,Indus Instruments, Webster, Texas
| | - Guillermo Medrano
- Division of Cardiovascular Sciences and the DeBakey Heart Center, Department of Medicine, Baylor College of Medicine, Houston, Texas
| | - Celia Pena Heredia
- Division of Cardiovascular Sciences and the DeBakey Heart Center, Department of Medicine, Baylor College of Medicine, Houston, Texas
| | - Mark L Entman
- Division of Cardiovascular Sciences and the DeBakey Heart Center, Department of Medicine, Baylor College of Medicine, Houston, Texas
| | - Dale J Hamilton
- Department of Medicine, Houston Methodist, Texas.,Center for Bioenergetics, Houston Methodist Hospital Research Institute, Texas
| | - Shumin Li
- Center for Bioenergetics, Houston Methodist Hospital Research Institute, Texas
| | - Erin Reineke
- Center for Bioenergetics, Houston Methodist Hospital Research Institute, Texas
| | - Anisha A Gupte
- Department of Medicine, Houston Methodist, Texas.,Center for Bioenergetics, Houston Methodist Hospital Research Institute, Texas
| | - Aijun Zhang
- Department of Medicine, Houston Methodist, Texas.,Center for Bioenergetics, Houston Methodist Hospital Research Institute, Texas
| | - George E Taffet
- Division of Cardiovascular Sciences and the DeBakey Heart Center, Department of Medicine, Baylor College of Medicine, Houston, Texas.,Department of Medicine, Houston Methodist, Texas.,Section of Geriatrics, Department of Medicine, Baylor College of Medicine, Houston, Texas
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21
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Ferguson DP, Monroe TO, Heredia CP, Fleischmann R, Rodney GG, Taffet GE, Fiorotto ML. Postnatal undernutrition alters adult female mouse cardiac structure and function leading to limited exercise capacity. J Physiol 2019; 597:1855-1872. [PMID: 30730556 DOI: 10.1113/jp277637] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 02/01/2019] [Indexed: 12/11/2022] Open
Abstract
KEY POINTS Impaired growth during fetal life can reprogramme heart development and increase the risk for long-term cardiovascular dysfunction. It is uncertain if the developmental window during which the heart is vulnerable to reprogramming as a result of inadequate nutrition extends into the postnatal period. We found that adult female mice that had been undernourished only from birth to 3 weeks of age had disproportionately smaller hearts compared to males, with thinner ventricle walls and more mononucleated cardiomyocytes. In females, but not males, cardiac diastolic function, and heart rate responsiveness to adrenergic stimulation were limited and maximal exercise capacity was compromised. These data suggest that the developmental window during which the heart is vulnerable to reprogramming by inadequacies in nutrient intake may extend into postnatal life and such individuals could be at increased risk for a cardiac event as a result of strenuous exercise. ABSTRACT Adults who experienced undernutrition during critical windows of development are at increased risk for cardiovascular disease. The contribution of cardiac function to this increased disease risk is uncertain. We evaluated the effect of a short episode of postnatal undernutrition on cardiovascular function in mice at the whole animal, organ, and cellular levels. Pups born to control mouse dams were suckled from birth to postnatal day (PN) 21 on dams fed either a control (20% protein) or a low protein (8% protein) isocaloric diet. After PN21 offspring were fed the same control diet until adulthood. At PN70 V ̇ O 2 , max was measured by treadmill test. At PN80 cardiac function was evaluated by echocardiography and Doppler analysis at rest and following β-adrenergic stimulation. Isolated cardiomyocyte nucleation and Ca2+ transients (with and without β-adrenergic stimulation) were measured at PN90. Female mice that were undernourished and then refed (PUN), unlike male mice, had disproportionately smaller hearts and their exercise capacity, cardiac diastolic function, and heart rate responsiveness to adrenergic stimulation were limited. A reduced left ventricular end diastolic volume, impaired early filling, and decreased stored energy at the beginning of diastole contributed to these impairments. Female PUN mice had more mononucleated cardiomyocytes; under resting conditions binucleated cells had a functional profile suggestive of increased basal adrenergic activation. Thus, a brief episode of early postnatal undernutrition in the mouse can produce persistent changes to cardiac structure and function that limit exercise/functional capacity and thereby increase the risk for the development of a wide variety of cardiovascular morbidities.
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Affiliation(s)
- David P Ferguson
- USDA/ARS Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, 77030, USA.,Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX, 77030, USA.,Department of Kinesiology, Michigan State University, East Lansing, MI, 48824, USA
| | - Tanner O Monroe
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Celia Pena Heredia
- Section of Geriatrics, Department of Medicine, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Ryan Fleischmann
- USDA/ARS Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - George G Rodney
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - George E Taffet
- Section of Geriatrics, Department of Medicine, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Marta L Fiorotto
- USDA/ARS Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, 77030, USA.,Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX, 77030, USA
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22
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Garbern JC, Williams J, Kristl AC, Malick A, Rachmin I, Gaeta B, Ahmed N, Vujic A, Libby P, Lee RT. Dysregulation of IL-33/ST2 signaling and myocardial periarteriolar fibrosis. J Mol Cell Cardiol 2019; 128:179-186. [PMID: 30763587 PMCID: PMC6402609 DOI: 10.1016/j.yjmcc.2019.01.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 12/31/2018] [Accepted: 01/22/2019] [Indexed: 02/07/2023]
Abstract
Microvascular dysfunction in the heart and its association with periarteriolar fibrosis may contribute to the diastolic dysfunction seen in heart failure with preserved ejection fraction. Interleukin-33 (IL-33) prevents global myocardial fibrosis in a pressure overloaded left ventricle by acting via its receptor, ST2 (encoded by the gene, Il1rl1); however, whether this cytokine can also modulate periarteriolar fibrosis remains unclear. We utilized two approaches to explore the role of IL-33/ST2 in periarteriolar fibrosis. First, we studied young and old wild type mice to test the hypothesis that IL-33 and ST2 expression change with age. Second, we produced pressure overload in mice deficient in IL-33 or ST2 by transverse aortic constriction (TAC). With age, IL-33 expression increased and ST2 expression decreased. These alterations accompanied increased periarteriolar fibrosis in aged mice. Mice deficient in ST2 but not IL-33 had a significant increase in periarteriolar fibrosis following TAC compared to wild type mice. Thus, loss of ST2 signaling rather than changes in IL-33 expression may contribute to periarteriolar fibrosis during aging or pressure overload, but manipulating this pathway alone may not prevent or reverse fibrosis.
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Affiliation(s)
- Jessica C Garbern
- Department of Stem Cell and Regenerative Biology and the Harvard Stem Cell Institute, Harvard University, 7 Divinity Ave, Cambridge, MA 02138, United States of America; Department of Cardiology, Boston Children's Hospital, 300 Longwood Ave, Boston, MA 02115, United States of America
| | - Jason Williams
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, 75 Francis St, Boston, MA 02115, United States of America
| | - Amy C Kristl
- Department of Stem Cell and Regenerative Biology and the Harvard Stem Cell Institute, Harvard University, 7 Divinity Ave, Cambridge, MA 02138, United States of America
| | - Alyyah Malick
- Department of Stem Cell and Regenerative Biology and the Harvard Stem Cell Institute, Harvard University, 7 Divinity Ave, Cambridge, MA 02138, United States of America
| | - Inbal Rachmin
- Department of Stem Cell and Regenerative Biology and the Harvard Stem Cell Institute, Harvard University, 7 Divinity Ave, Cambridge, MA 02138, United States of America
| | - Benjamin Gaeta
- Department of Stem Cell and Regenerative Biology and the Harvard Stem Cell Institute, Harvard University, 7 Divinity Ave, Cambridge, MA 02138, United States of America
| | - Nafis Ahmed
- Department of Stem Cell and Regenerative Biology and the Harvard Stem Cell Institute, Harvard University, 7 Divinity Ave, Cambridge, MA 02138, United States of America
| | - Ana Vujic
- Department of Stem Cell and Regenerative Biology and the Harvard Stem Cell Institute, Harvard University, 7 Divinity Ave, Cambridge, MA 02138, United States of America
| | - Peter Libby
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, 75 Francis St, Boston, MA 02115, United States of America.
| | - Richard T Lee
- Department of Stem Cell and Regenerative Biology and the Harvard Stem Cell Institute, Harvard University, 7 Divinity Ave, Cambridge, MA 02138, United States of America; Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, 75 Francis St, Boston, MA 02115, United States of America.
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23
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Qin Q, Mehta H, Yen K, Navarrete G, Brandhorst S, Wan J, Delrio S, Zhang X, Lerman LO, Cohen P, Lerman A. Chronic treatment with the mitochondrial peptide humanin prevents age-related myocardial fibrosis in mice. Am J Physiol Heart Circ Physiol 2018; 315:H1127-H1136. [PMID: 30004252 PMCID: PMC6415743 DOI: 10.1152/ajpheart.00685.2017] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 07/11/2018] [Accepted: 07/11/2018] [Indexed: 01/07/2023]
Abstract
Cardiac fibrosis is a biological process that increases with age and contributes to myocardial dysfunction. Humanin (HN) is an endogenous mitochondria-derived peptide that has cytoprotective effects and reduces oxidative stress. The present study aimed to test the hypothesis that chronic supplementation of exogenous HN in middle-aged mice could prevent and reverse cardiac fibrosis and apoptosis in the aging heart. Female C57BL/6N mice at 18 mo of age received 14-mo intraperitoneal injections of vehicle (old group; n = 6) or HN analog (HNG; 4 mg/kg 2 times/wk, old + HNG group, n = 8) and were euthanized at 32 mo of age. C57BL/6N female mice (young group, n = 5) at 5 mo of age were used as young controls. HNG treatment significantly increased the ratio of cardiomyocytes to fibroblasts in aging hearts, as shown by the percentage of each cell type in randomly chosen fields after immunofluorescence staining. Furthermore, the increased collagen deposition in aged hearts was significantly reduced after HNG treatment, as indicated by picrosirius red staining. HNG treatment also reduced in aging mice cardiac fibroblast proliferation (5'-bromo-2-deoxyuridine staining) and attenuated transforming growth factor-β1, fibroblast growth factor-2, and matrix metalloproteinase-2 expression (immunohistochemistry or real-time PCR). Myocardial apoptosis was inhibited in HNG-treated aged mice (TUNEL staining). To decipher the pathway involved in the attenuation of the myocardial fibrosis by HNG, Western blot analysis was done and showed that HNG upregulated the Akt/glycogen synthase kinase -3β pathway in aged mice. Exogenous HNG treatment attenuated myocardial fibrosis and apoptosis in aged mice. The results of the present study suggest a role for the mitochondria-derived peptide HN in the cardioprotection associated with aging. NEW & NOTEWORTHY Cardiac fibrosis is a biological process that increases with age and contributes to myocardial dysfunction. Humanin is an endogenous mitochondria-derived peptide that has cytoprotective effects and reduces oxidative stress. Here, we demonstrate, for the first time, that exogenous humanin treatment attenuated myocardial fibrosis and apoptosis in aging mice. We also detected upregulated Akt/glycogen synthase kinase-3β pathway in humanin analog-treated mice, which might be the mechanism involved in the cardioprotective effect of humanin analog in aging mice.
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Affiliation(s)
- Qing Qin
- Department of Cardiovascular Diseases, Mayo Clinic , Rochester, Minnesota
- Shanghai Institute of Cardiovascular disease, Zhongshan Hospital, Fudan University , Shanghai , China
| | - Hemal Mehta
- Leonard Davis School of Gerontology, University of Southern California , Los Angeles, California
| | - Kelvin Yen
- Leonard Davis School of Gerontology, University of Southern California , Los Angeles, California
| | - Gerardo Navarrete
- Leonard Davis School of Gerontology, University of Southern California , Los Angeles, California
| | - Sebastian Brandhorst
- Leonard Davis School of Gerontology, University of Southern California , Los Angeles, California
| | - Junxiang Wan
- Leonard Davis School of Gerontology, University of Southern California , Los Angeles, California
| | | | - Xin Zhang
- Division of Nephrology and Hypertension, Mayo Clinic , Rochester, Minnesota
| | - Lilach O Lerman
- Division of Nephrology and Hypertension, Mayo Clinic , Rochester, Minnesota
| | - Pinchas Cohen
- Leonard Davis School of Gerontology, University of Southern California , Los Angeles, California
| | - Amir Lerman
- Department of Cardiovascular Diseases, Mayo Clinic , Rochester, Minnesota
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24
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Kazakov A, Hall RA, Werner C, Meier T, Trouvain A, Rodionycheva S, Nickel A, Lammert F, Maack C, Böhm M, Laufs U. Raf kinase inhibitor protein mediates myocardial fibrosis under conditions of enhanced myocardial oxidative stress. Basic Res Cardiol 2018; 113:42. [PMID: 30191336 PMCID: PMC6133069 DOI: 10.1007/s00395-018-0700-3] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 08/15/2018] [Indexed: 12/21/2022]
Abstract
Fibrosis is a hallmark of maladaptive cardiac remodelling. Here we report that genome-wide quantitative trait locus (QTL) analyses in recombinant inbred mouse lines of C57BL/6 J and DBA2/J strains identified Raf Kinase Inhibitor Protein (RKIP) as genetic marker of fibrosis progression. C57BL/6 N-RKIP−/− mice demonstrated diminished fibrosis induced by transverse aortic constriction (TAC) or CCl4 (carbon tetrachloride) treatment compared with wild-type controls. TAC-induced expression of collagen Iα2 mRNA, Ki67+ fibroblasts and marker of oxidative stress 8-hydroxyguanosine (8-dOHG)+ fibroblasts as well as the number of fibrocytes in the peripheral blood and bone marrow were markedly reduced in C57BL/6 N-RKIP−/− mice. RKIP-deficient cardiac fibroblasts demonstrated decreased migration and fibronectin production. This was accompanied by a two-fold increase of the nuclear accumulation of nuclear factor erythroid 2-related factor 2 (Nrf2), the main transcriptional activator of antioxidative proteins, and reduced expression of its inactivators. To test the importance of oxidative stress for this signaling, C57BL/6 J mice were studied. C57BL/6 J, but not the C57BL/6 N-strain, is protected from TAC-induced oxidative stress due to mutation of the nicotinamide nucleotide transhydrogenase gene (Nnt). After TAC surgery, the hearts of Nnt-deficient C57BL/6 J-RKIP−/− mice revealed diminished oxidative stress, increased left ventricular (LV) fibrosis and collagen Iα2 as well as enhanced basal nuclear expression of Nrf2. In human LV myocardium from both non-failing and failing hearts, RKIP-protein correlated negatively with the nuclear accumulation of Nrf2. In summary, under conditions of Nnt-dependent enhanced myocardial oxidative stress induced by TAC, RKIP plays a maladaptive role for fibrotic myocardial remodeling by suppressing the Nrf2-related beneficial effects.
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Affiliation(s)
- Andrey Kazakov
- Klinik für Innere Medizin III, Kardiologie, Angiologie und Internistische Intensivmedizin, Universität/Universitätsklinikum des Saarlandes, Kirrberger Strasse 100, IMED, 66421, Homburg, Germany.
| | - Rabea A Hall
- Klinik für Innere Medizin II, Gastroenterologie, Hepatologie, Endokrinologie, Diabetologie und Ernährungsmedizin, Universität/Universitätsklinikum des Saarlandes, Kirrberger Strasse 77, 66421, Homburg, Germany
| | - Christian Werner
- Klinik für Innere Medizin III, Kardiologie, Angiologie und Internistische Intensivmedizin, Universität/Universitätsklinikum des Saarlandes, Kirrberger Strasse 100, IMED, 66421, Homburg, Germany
| | - Timo Meier
- Klinik für Innere Medizin III, Kardiologie, Angiologie und Internistische Intensivmedizin, Universität/Universitätsklinikum des Saarlandes, Kirrberger Strasse 100, IMED, 66421, Homburg, Germany
| | - André Trouvain
- Klinik für Innere Medizin III, Kardiologie, Angiologie und Internistische Intensivmedizin, Universität/Universitätsklinikum des Saarlandes, Kirrberger Strasse 100, IMED, 66421, Homburg, Germany
| | - Svetlana Rodionycheva
- Klinik für Thorax- und Herz-Gefäßchirurgie, Universität/Universitätsklinikum des Saarlandes, Kirrberger Strasse 57, 66421, Homburg, Germany
| | - Alexander Nickel
- Deutsches Zentrum für Herzinsuffizienz, Universitätsklinikum Würzburg, am Schwarzenberg 15, A15, 97078, Würzburg, Germany
| | - Frank Lammert
- Klinik für Innere Medizin II, Gastroenterologie, Hepatologie, Endokrinologie, Diabetologie und Ernährungsmedizin, Universität/Universitätsklinikum des Saarlandes, Kirrberger Strasse 77, 66421, Homburg, Germany
| | - Christoph Maack
- Deutsches Zentrum für Herzinsuffizienz, Universitätsklinikum Würzburg, am Schwarzenberg 15, A15, 97078, Würzburg, Germany
| | - Michael Böhm
- Klinik für Innere Medizin III, Kardiologie, Angiologie und Internistische Intensivmedizin, Universität/Universitätsklinikum des Saarlandes, Kirrberger Strasse 100, IMED, 66421, Homburg, Germany
| | - Ulrich Laufs
- Klinik und Poliklinik für Kardiologie, Universitätsklinikum Leipzig, Liebigstrasse 20, 04103, Leipzig, Germany
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25
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Trial J, Cieslik KA. Changes in cardiac resident fibroblast physiology and phenotype in aging. Am J Physiol Heart Circ Physiol 2018; 315:H745-H755. [PMID: 29906228 DOI: 10.1152/ajpheart.00237.2018] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The cardiac fibroblast plays a central role in tissue homeostasis and in repair after injury. With aging, dysregulated cardiac fibroblasts have a reduced capacity to activate a canonical transforming growth factor-β-Smad pathway and differentiate poorly into contractile myofibroblasts. That results in the formation of an insufficient scar after myocardial infarction. In contrast, in the uninjured aged heart, fibroblasts are activated and acquire a profibrotic phenotype that leads to interstitial fibrosis, ventricular stiffness, and diastolic dysfunction, all conditions that may lead to heart failure. There is an apparent paradox in aging, wherein reparative fibrosis is impaired but interstitial, adverse fibrosis is augmented. This could be explained by analyzing the effectiveness of signaling pathways in resident fibroblasts from young versus aged hearts. Whereas defective signaling by transforming growth factor-β leads to insufficient scar formation by myofibroblasts, enhanced activation of the ERK1/2 pathway may be responsible for interstitial fibrosis mediated by activated fibroblasts. Listen to this article's corresponding podcast at https://ajpheart.podbean.com/e/fibroblast-phenotypic-changes-in-the-aging-heart/ .
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Affiliation(s)
- JoAnn Trial
- Division of Cardiovascular Sciences, Department of Medicine, Baylor College of Medicine , Houston, Texas
| | - Katarzyna A Cieslik
- Division of Cardiovascular Sciences, Department of Medicine, Baylor College of Medicine , Houston, Texas
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26
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Mouton AJ, DeLeon-Pennell KY, Rivera Gonzalez OJ, Flynn ER, Freeman TC, Saucerman JJ, Garrett MR, Ma Y, Harmancey R, Lindsey ML. Mapping macrophage polarization over the myocardial infarction time continuum. Basic Res Cardiol 2018; 113:26. [PMID: 29868933 PMCID: PMC5986831 DOI: 10.1007/s00395-018-0686-x] [Citation(s) in RCA: 187] [Impact Index Per Article: 31.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Accepted: 05/29/2018] [Indexed: 12/24/2022]
Abstract
In response to myocardial infarction (MI), cardiac macrophages regulate inflammation and scar formation. We hypothesized that macrophages undergo polarization state changes over the MI time course and assessed macrophage polarization transcriptomic signatures over the first week of MI. C57BL/6 J male mice (3–6 months old) were subjected to permanent coronary artery ligation to induce MI, and macrophages were isolated from the infarct region at days 1, 3, and 7 post-MI. Day 0, no MI resident cardiac macrophages served as the negative MI control. Whole transcriptome analysis was performed using RNA-sequencing on n = 4 pooled sets for each time. Day 1 macrophages displayed a unique pro-inflammatory, extracellular matrix (ECM)-degrading signature. By flow cytometry, day 0 macrophages were largely F4/80highLy6Clow resident macrophages, whereas day 1 macrophages were largely F4/80lowLy6Chigh infiltrating monocytes. Day 3 macrophages exhibited increased proliferation and phagocytosis, and expression of genes related to mitochondrial function and oxidative phosphorylation, indicative of metabolic reprogramming. Day 7 macrophages displayed a pro-reparative signature enriched for genes involved in ECM remodeling and scar formation. By triple in situ hybridization, day 7 infarct macrophages in vivo expressed collagen I and periostin mRNA. Our results indicate macrophages show distinct gene expression profiles over the first week of MI, with metabolic reprogramming important for polarization. In addition to serving as indirect mediators of ECM remodeling, macrophages are a direct source of ECM components. Our study is the first to report the detailed changes in the macrophage transcriptome over the first week of MI.
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Affiliation(s)
- Alan J Mouton
- Department of Physiology and Biophysics, Mississippi Center for Heart Research, University of Mississippi Medical Center, 2500 North State St., Jackson, MS, 39216-4505, USA
| | - Kristine Y DeLeon-Pennell
- Department of Physiology and Biophysics, Mississippi Center for Heart Research, University of Mississippi Medical Center, 2500 North State St., Jackson, MS, 39216-4505, USA.,Research Service, G.V. (Sonny) Montgomery Veterans Affairs Medical Center, Jackson, MS, 39216, USA
| | - Osvaldo J Rivera Gonzalez
- Department of Physiology and Biophysics, Mississippi Center for Heart Research, University of Mississippi Medical Center, 2500 North State St., Jackson, MS, 39216-4505, USA
| | - Elizabeth R Flynn
- Department of Physiology and Biophysics, Mississippi Center for Heart Research, University of Mississippi Medical Center, 2500 North State St., Jackson, MS, 39216-4505, USA
| | - Tom C Freeman
- The Roslin Institute, University of Edinburgh, Easter Bush, Midlothian, Scotland, UK
| | - Jeffrey J Saucerman
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA, USA
| | - Michael R Garrett
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, MS, 39216, USA
| | - Yonggang Ma
- Department of Physiology and Biophysics, Mississippi Center for Heart Research, University of Mississippi Medical Center, 2500 North State St., Jackson, MS, 39216-4505, USA
| | - Romain Harmancey
- Department of Physiology and Biophysics, Mississippi Center for Heart Research, University of Mississippi Medical Center, 2500 North State St., Jackson, MS, 39216-4505, USA
| | - Merry L Lindsey
- Department of Physiology and Biophysics, Mississippi Center for Heart Research, University of Mississippi Medical Center, 2500 North State St., Jackson, MS, 39216-4505, USA. .,Research Service, G.V. (Sonny) Montgomery Veterans Affairs Medical Center, Jackson, MS, 39216, USA.
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27
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Cieslik KA, Trial J, Entman ML. Aicar treatment reduces interstitial fibrosis in aging mice: Suppression of the inflammatory fibroblast. J Mol Cell Cardiol 2017; 111:81-85. [PMID: 28826664 DOI: 10.1016/j.yjmcc.2017.08.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 08/01/2017] [Accepted: 08/03/2017] [Indexed: 01/16/2023]
Abstract
In 2030, elderly people will represent 20% of the United States population. Even now, chronic cardiac diseases, especially heart failure with preserved systolic function (HFpEF), are the most expensive DRGs for Medicare. Progressive interstitial fibrosis in the aging heart is well recognized as an important component of HFpEF. Our recent studies suggested an important pathophysiologic role for reduced TGF-β receptor 1 (TGFβR1) signaling in mesenchymal stem cells (MSCs) and their mesenchymal fibroblast progeny in the development of interstitial fibrosis. This report arises from our previous studies, which suggest that an inflammatory phenotype exists in these mesenchymal fibroblasts as a result of a reduced TGF-β-Smad-dependent pathway but upregulated farnesyltransferase (FTase)-Ras-Erk signaling. In this report we provide evidence for a therapeutic approach that downregulates Erk activation through an adenosine monophosphate-activated kinase (AMPK) pathway. Aging C57BL/6J mice were treated with AICAR (an AMPK activator) for a 30-day period. This treatment suppressed excessive monocyte chemoattractant protein-1 (MCP-1) generation, which diminished leukocyte infiltration and in consequence suppressed the formation of macrophage-derived myeloid fibroblasts. Interestingly, the number of mesenchymal fibroblasts was also reduced. In addition, we observed changes in extracellular matrix (ECM) deposition, specifically that collagen type I and the alternatively spliced variant of fibronectin (EDA) expressions were reduced. These data suggest that the upregulation of AMPK activity is a potential therapeutic approach to fibrosis in the aging heart.
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Affiliation(s)
- Katarzyna A Cieslik
- Division of Cardiovascular Sciences, DeBakey Heart Center, Department of Medicine, Baylor College of Medicine, Houston, TX, United States; Houston Methodist Hospital, Houston, TX, United States
| | - JoAnn Trial
- Division of Cardiovascular Sciences, DeBakey Heart Center, Department of Medicine, Baylor College of Medicine, Houston, TX, United States; Houston Methodist Hospital, Houston, TX, United States
| | - Mark L Entman
- Division of Cardiovascular Sciences, DeBakey Heart Center, Department of Medicine, Baylor College of Medicine, Houston, TX, United States; Houston Methodist Hospital, Houston, TX, United States.
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