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Liu L, Zhu L, Liang Q, Yu L, Hu L, Yu Y, Cheng X, Bao H. Tissue-resident C1q + macrophages exert anti-aging potential through the Sirt1 pathway. Inflamm Res 2024; 73:1069-1080. [PMID: 38724770 DOI: 10.1007/s00011-024-01883-8] [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: 01/10/2024] [Revised: 03/03/2024] [Accepted: 04/08/2024] [Indexed: 07/01/2024] Open
Abstract
OBJECTIVE Resident immune cells are at the forefront of sensory organ-specific signals, and changes in these cells are closely related to the aging process. The Sirt pathway can regulate NAD + metabolism during aging, thereby affecting the accumulation of ROS. However, the role of the Sirt pathway in resident immune cells in aged tissues is currently unclear. METHODS We investigated Sirt1 signalling in resident immune cells during chronic inflammation in an aged mouse model. Integrated single-cell RNA sequencing data from young and aged mice were used to refine the characterization of immune cells in aged tissues RESULTS: We found that C1q + macrophages could affect chronic inflammation during aging. C1q + macrophages acted in an opposing manner to Il1b + macrophages and were responsible for anti-inflammatory effects during aging. Sirt1 agonists inhibited the decrease in C1qb in macrophages during aging, and anti-aging drugs could affect the expression of C1qb in macrophages via the Sirt1 pathway. CONCLUSIONS In this study, we first identified the relevance of C1q + macrophages in chronic inflammation during aging. The potential anti-aging effect of C1q + macrophages was mediated by the Sirt1 pathway, suggesting new strategies for aging immunotherapy.
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Affiliation(s)
- Liang Liu
- Department of Cardiovascular Medicine, The Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, 330000, China
- Jiangxi Provincial Cardiovascular Disease Clinical Medical Research Center, Nanchang, 330000, China
- Jiangxi Sub-Center of National Clinical Research Center for Cardiovascular Diseases, Nanchang, 330000, China
| | - Lingjuan Zhu
- Center for Prevention and Treatment of Cardiovascular Diseases, The Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, 330000, China
- Jiangxi Provincial Cardiovascular Disease Clinical Medical Research Center, Nanchang, 330000, China
- Jiangxi Sub-Center of National Clinical Research Center for Cardiovascular Diseases, Nanchang, 330000, China
| | - Qian Liang
- Department of Science and Technology, The Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, 330000, China
| | - Lingling Yu
- Department of Rehabilitation, The Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, 330000, China
| | - Longlong Hu
- Department of Cardiovascular Medicine, The Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, 330000, China
| | - Yun Yu
- Department of Cardiovascular Medicine, The Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, 330000, China
| | - Xiaoshu Cheng
- Department of Cardiovascular Medicine, The Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, 330000, China.
- Center for Prevention and Treatment of Cardiovascular Diseases, The Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, 330000, China.
- Jiangxi Provincial Cardiovascular Disease Clinical Medical Research Center, Nanchang, 330000, China.
- Jiangxi Sub-Center of National Clinical Research Center for Cardiovascular Diseases, Nanchang, 330000, China.
| | - Huihui Bao
- Department of Cardiovascular Medicine, The Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, 330000, China.
- Center for Prevention and Treatment of Cardiovascular Diseases, The Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, 330000, China.
- Jiangxi Provincial Cardiovascular Disease Clinical Medical Research Center, Nanchang, 330000, China.
- Jiangxi Sub-Center of National Clinical Research Center for Cardiovascular Diseases, Nanchang, 330000, China.
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Wculek SK, Forisch S, Miguel V, Sancho D. Metabolic homeostasis of tissue macrophages across the lifespan. Trends Endocrinol Metab 2024:S1043-2760(24)00111-5. [PMID: 38763781 DOI: 10.1016/j.tem.2024.04.017] [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: 03/18/2024] [Revised: 04/19/2024] [Accepted: 04/22/2024] [Indexed: 05/21/2024]
Abstract
Macrophages are present in almost all organs. Apart from being immune sentinels, tissue-resident macrophages (TRMs) have organ-specific functions that require a specialized cellular metabolism to maintain homeostasis. In addition, organ-dependent metabolic adaptations of TRMs appear to be fundamentally distinct in homeostasis and in response to a challenge, such as infection or injury. Moreover, TRM function becomes aberrant with advancing age, contributing to inflammaging and organ deterioration, and a metabolic imbalance may underlie TRM immunosenescence. Here, we outline current understanding of the particular metabolic states of TRMs across organs and the relevance for their function. Moreover, we discuss the concomitant aging-related decline in metabolic plasticity and functions of TRMs, highlighting potential novel therapeutic avenues to promote healthy aging.
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Affiliation(s)
- Stefanie K Wculek
- Institute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology (BIST), Barcelona, Spain.
| | - Stephan Forisch
- Institute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology (BIST), Barcelona, Spain
| | - Verónica Miguel
- Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, Spain
| | - David Sancho
- Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, Spain.
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Wang X, Xie L, Liu C. CCR2 antagonist attenuates calcium oxalate-induced kidney oxidative stress and inflammation by regulating macrophage activation. Exp Anim 2024; 73:211-222. [PMID: 38199255 PMCID: PMC11091353 DOI: 10.1538/expanim.23-0113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Accepted: 12/23/2023] [Indexed: 01/12/2024] Open
Abstract
C-C chemokine receptor type 2 (CCR2) is a monocyte chemokine associated with oxidative stress and inflammation. Kidney stones (KS) are composed of calcium oxalate (CaOx), which trigger renal oxidative stress and inflammatory. This study aims to evaluate the effects of CCR2 on KS in vivo and in vitro. Eight-week-old male C57BL/6J mice were intraperitoneally injected with glyoxylate (GOX) daily to establish a KS model, and along with CCR2 antagonist (INCB3344) treatment on days 2, 4, and 6. The results showed that CCR2 antagonist reduced renal injury markers (blood urea nitrogen and serum creatinine), alleviated renal tubular injury and CaOx crystal deposition. CCR2 antagonist also decreased CCR2 expression induced by GOX treatment and increased Nrf2 expression. GOX treatment promoted malondialdehyde (MDA) production, decreased glutathione (GSH) content, and inhibited catalase (CAT) and superoxide dismutase (SOD) activity, however, CCR2 antagonist attenuated the above effects of GOX. CCR2 antagonist had inhibitory effects on GOX-induced inflammatory cytokine expression (IL1B, IL6 and MCP1), and inhibited apoptosis by increasing Bcl-2 expression and decreasing Bax and cleaved-caspase 3 expression. In vitro experiments were performed by co-culture model of CaOx-induced damaged HK-2 cells and macrophage-like THP-1 cells. CCR2 antagonist inhibited CaOx-induced THP-1 cell M1 polarization by decreasing the TNF-α, IL6 and iNOS levels, and further alleviated CaOx-induced oxidative stress damage, inflammatory response and apoptosis of HK-2 cells. The study suggests that CCR2 antagonist may be resistant to CaOx crystals-induced oxidative stress and inflammation by inhibiting macrophage M1 polarization.
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Affiliation(s)
- Xinpeng Wang
- Department of Urology, Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University, 23 Pingjiang Road, Hexi District, Tianjin 300211, P.R. China
| | - Linguo Xie
- Department of Urology, Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University, 23 Pingjiang Road, Hexi District, Tianjin 300211, P.R. China
| | - Chunyu Liu
- Department of Urology, Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University, 23 Pingjiang Road, Hexi District, Tianjin 300211, P.R. China
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4
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Chew C, Brand OJ, Yamamura T, Lawless C, Morais MRPT, Zeef L, Lin IH, Howell G, Lui S, Lausecker F, Jagger C, Shaw TN, Krishnan S, McClure FA, Bridgeman H, Wemyss K, Konkel JE, Hussell T, Lennon R. Kidney resident macrophages have distinct subsets and multifunctional roles. Matrix Biol 2024; 127:23-37. [PMID: 38331051 DOI: 10.1016/j.matbio.2024.02.002] [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: 06/15/2023] [Revised: 02/02/2024] [Accepted: 02/05/2024] [Indexed: 02/10/2024]
Abstract
BACKGROUND The kidney contains distinct glomerular and tubulointerstitial compartments with diverse cell types and extracellular matrix components. The role of immune cells in glomerular environment is crucial for dampening inflammation and maintaining homeostasis. Macrophages are innate immune cells that are influenced by their tissue microenvironment. However, the multifunctional role of kidney macrophages remains unclear. METHODS Flow and imaging cytometry were used to determine the relative expression of CD81 and CX3CR1 (C-X3-C motif chemokine receptor 1) in kidney macrophages. Monocyte replenishment was assessed in Cx3cr1CreER X R26-yfp-reporter and shielded chimeric mice. Bulk RNA-sequencing and mass spectrometry-based proteomics were performed on isolated kidney macrophages from wild type and Col4a5-/- (Alport) mice. RNAscope was used to visualize transcripts and macrophage purity in bulk RNA assessed by CIBERSORTx analyses. RESULTS In wild type mice we identified three distinct kidney macrophage subsets using CD81 and CX3CR1 and these subsets showed dependence on monocyte replenishment. In addition to their immune function, bulk RNA-sequencing of macrophages showed enrichment of biological processes associated with extracellular matrix. Proteomics identified collagen IV and laminins in kidney macrophages from wild type mice whilst other extracellular matrix proteins including cathepsins, ANXA2 and LAMP2 were enriched in Col4a5-/- (Alport) mice. A subset of kidney macrophages co-expressed matrix and macrophage transcripts. CONCLUSIONS We identified CD81 and CX3CR1 positive kidney macrophage subsets with distinct dependence for monocyte replenishment. Multiomic analysis demonstrated that these cells have diverse functions that underscore the importance of macrophages in kidney health and disease.
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Affiliation(s)
- Christine Chew
- Lydia Becker Institute for Immunology and Inflammation, Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, Faculty of Biology Medicine and Health, The University of Manchester, Manchester M13 9PL, United Kingdom; Wellcome Centre for Cell-Matrix Research, Division of Cell-Matrix Biology and Regenerative Medicine, School of Biological Sciences, Faculty of Biology Medicine and Health, The University of Manchester, Manchester Academic Health Science Centre, Manchester M13 9PT, United Kingdom
| | - Oliver J Brand
- Lydia Becker Institute for Immunology and Inflammation, Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, Faculty of Biology Medicine and Health, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Tomohiko Yamamura
- Wellcome Centre for Cell-Matrix Research, Division of Cell-Matrix Biology and Regenerative Medicine, School of Biological Sciences, Faculty of Biology Medicine and Health, The University of Manchester, Manchester Academic Health Science Centre, Manchester M13 9PT, United Kingdom
| | - Craig Lawless
- Wellcome Centre for Cell-Matrix Research, Division of Cell-Matrix Biology and Regenerative Medicine, School of Biological Sciences, Faculty of Biology Medicine and Health, The University of Manchester, Manchester Academic Health Science Centre, Manchester M13 9PT, United Kingdom
| | - Mychel Raony Paiva Teixeira Morais
- Wellcome Centre for Cell-Matrix Research, Division of Cell-Matrix Biology and Regenerative Medicine, School of Biological Sciences, Faculty of Biology Medicine and Health, The University of Manchester, Manchester Academic Health Science Centre, Manchester M13 9PT, United Kingdom
| | - Leo Zeef
- Bioinformatics Core Facility, Faculty of Biology Medicine and Health, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - I-Hsuan Lin
- Bioinformatics Core Facility, Faculty of Biology Medicine and Health, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Gareth Howell
- Lydia Becker Institute for Immunology and Inflammation, Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, Faculty of Biology Medicine and Health, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Sylvia Lui
- Lydia Becker Institute for Immunology and Inflammation, Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, Faculty of Biology Medicine and Health, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Franziska Lausecker
- Wellcome Centre for Cell-Matrix Research, Division of Cell-Matrix Biology and Regenerative Medicine, School of Biological Sciences, Faculty of Biology Medicine and Health, The University of Manchester, Manchester Academic Health Science Centre, Manchester M13 9PT, United Kingdom
| | - Christopher Jagger
- Lydia Becker Institute for Immunology and Inflammation, Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, Faculty of Biology Medicine and Health, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Tovah N Shaw
- Institute of Immunology and Infection Research, School of Biological Sciences, University of Edinburgh, Ashworth Laboratories, Edinburgh EH9 3FL, United Kingdom
| | - Siddharth Krishnan
- Lydia Becker Institute for Immunology and Inflammation, Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, Faculty of Biology Medicine and Health, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Flora A McClure
- Lydia Becker Institute for Immunology and Inflammation, Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, Faculty of Biology Medicine and Health, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Hayley Bridgeman
- Lydia Becker Institute for Immunology and Inflammation, Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, Faculty of Biology Medicine and Health, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Kelly Wemyss
- Lydia Becker Institute for Immunology and Inflammation, Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, Faculty of Biology Medicine and Health, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Joanne E Konkel
- Lydia Becker Institute for Immunology and Inflammation, Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, Faculty of Biology Medicine and Health, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Tracy Hussell
- Lydia Becker Institute for Immunology and Inflammation, Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, Faculty of Biology Medicine and Health, The University of Manchester, Manchester M13 9PL, United Kingdom.
| | - Rachel Lennon
- Wellcome Centre for Cell-Matrix Research, Division of Cell-Matrix Biology and Regenerative Medicine, School of Biological Sciences, Faculty of Biology Medicine and Health, The University of Manchester, Manchester Academic Health Science Centre, Manchester M13 9PT, United Kingdom; Department of Paediatric Nephrology, Royal Manchester Children's Hospital, Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester M13 9WL, United Kingdom.
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Jo MJ, Lee JK, Kim JE, Ko GJ. Molecular Mechanisms Associated with Aging Kidneys and Future Perspectives. Int J Mol Sci 2023; 24:16912. [PMID: 38069234 PMCID: PMC10707287 DOI: 10.3390/ijms242316912] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 11/24/2023] [Accepted: 11/27/2023] [Indexed: 12/18/2023] Open
Abstract
The rapid growth of the elderly population is making the need for extensive and advanced information about age-related organ dysfunction a crucial research area. The kidney is one of the organs most affected by aging. Aged kidneys undergo functional decline, characterized by a reduction in kidney size, decreased glomerular filtration rate, alterations in renal blood flow, and increased inflammation and fibrosis. This review offers a foundation for understanding the functional and molecular mechanisms of aging kidneys and for selecting identifying appropriate targets for future treatments of age-related kidney issues.
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Affiliation(s)
- Min-Jee Jo
- Department of Internal Medicine, Korea University College of Medicine, Korea University Guro Hospital, Seoul 08308, Republic of Korea; (M.-J.J.); (J.-K.L.); (J.-E.K.)
- Institute of Convergence New Drug Development, Korea University College of Medicine, Seoul 08308, Republic of Korea
| | - Joo-Kyung Lee
- Department of Internal Medicine, Korea University College of Medicine, Korea University Guro Hospital, Seoul 08308, Republic of Korea; (M.-J.J.); (J.-K.L.); (J.-E.K.)
| | - Ji-Eun Kim
- Department of Internal Medicine, Korea University College of Medicine, Korea University Guro Hospital, Seoul 08308, Republic of Korea; (M.-J.J.); (J.-K.L.); (J.-E.K.)
| | - Gang-Jee Ko
- Department of Internal Medicine, Korea University College of Medicine, Korea University Guro Hospital, Seoul 08308, Republic of Korea; (M.-J.J.); (J.-K.L.); (J.-E.K.)
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Sinning J, Funk ND, Soerensen-Zender I, Wulfmeyer VC, Liao CM, Haller H, Hinze C, Schmidt-Ott KM, Melk A, Schmitt R. The aging kidney is characterized by tubuloinflammaging, a phenotype associated with MHC-II gene expression. Front Immunol 2023; 14:1222339. [PMID: 37675124 PMCID: PMC10477980 DOI: 10.3389/fimmu.2023.1222339] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Accepted: 08/01/2023] [Indexed: 09/08/2023] Open
Abstract
Introduction Even during physiologic aging, the kidney experiences a loss of mass and a progressive functional decline. This is clinically relevant as it leads to an increased risk of acute and chronic kidney disease. The kidney tubular system plays an important role in the underlying aging process, but the involved cellular mechanisms remain largely elusive. Methods Kidneys of 3-, 12- and 24-month-old male C57BL/6J mice were used for RNA sequencing, histological examination, immunostaining and RNA-in-situ-hybridization. Single cell RNA sequencing data of differentially aged murine and human kidneys was analyzed to identify age-dependent expression patterns in tubular epithelial cells. Senescent and non-senescent primary tubular epithelial cells from mouse kidney were used for in vitro experiments. Results During normal kidney aging, tubular cells adopt an inflammatory phenotype, characterized by the expression of MHC class II related genes. In our analysis of bulk and single cell transcriptional data we found that subsets of tubular cells show an age-related expression of Cd74, H2-Eb1 and H2-Ab1 in mice and CD74, HLA-DQB1 and HLADRB1 in humans. Expression of MHC class II related genes was associated with a phenotype of tubular cell senescence, and the selective elimination of senescent cells reversed the phenotype. Exposure to the Cd74 ligand MIF promoted a prosenescent phenotype in tubular cell cultures. Discussion Together, these data suggest that during normal renal aging tubular cells activate a program of 'tubuloinflammaging', which might contribute to age-related phenotypical changes and to increased disease susceptibility.
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Affiliation(s)
- Julius Sinning
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany
| | - Nils David Funk
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany
| | - Inga Soerensen-Zender
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany
| | | | - Chieh Ming Liao
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany
| | - Hermann Haller
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany
| | - Christian Hinze
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany
| | | | - Anette Melk
- Department of Pediatric Kidney, Liver and Metabolic Diseases, Hannover Medical School, Hannover, Germany
| | - Roland Schmitt
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany
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Yang X, Wang Y, Rovella V, Candi E, Jia W, Bernassola F, Bove P, Piacentini M, Scimeca M, Sica G, Tisone G, Mauriello A, Wei L, Melino G, Shi Y. Aged mesenchymal stem cells and inflammation: from pathology to potential therapeutic strategies. Biol Direct 2023; 18:40. [PMID: 37464416 PMCID: PMC10353240 DOI: 10.1186/s13062-023-00394-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Accepted: 06/27/2023] [Indexed: 07/20/2023] Open
Abstract
Natural ageing of organisms and corresponding age-related diseases result mainly from stem cell ageing and "inflammaging". Mesenchymal stem cells (MSCs) exhibit very high immune-regulating capacity and are promising candidates for immune-related disease treatment. However, the effect of MSC application is not satisfactory for some patients, especially in elderly individuals. With ageing, MSCs undergo many changes, including altered cell population reduction and differentiation ability, reduced migratory and homing capacity and, most important, defective immunosuppression. It is necessary to explore the relationship between the "inflammaging" and aged MSCs to prevent age-related diseases and increase the therapeutic effects of MSCs. In this review, we discuss changes in naturally ageing MSCs mainly from an inflammation perspective and propose some ideas for rejuvenating aged MSCs in future treatments.
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Affiliation(s)
- Xue Yang
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, 00133 Italy
- The Third Affiliated Hospital of Soochow University, Institutes for Translational Medicine, State Key Laboratory of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou, Jiangsu China
| | - Ying Wang
- The Third Affiliated Hospital of Soochow University, Institutes for Translational Medicine, State Key Laboratory of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou, Jiangsu China
| | - Valentina Rovella
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, 00133 Italy
| | - Eleonora Candi
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, 00133 Italy
| | - Wei Jia
- Center for Translational Medicine, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Sixth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200233 China
- School of Chinese Medicine, Hong Kong Baptist University, Kowloon Tong, Hong Kong China
| | - Francesca Bernassola
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, 00133 Italy
| | - Pierluigi Bove
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, 00133 Italy
| | - Mauro Piacentini
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, 00133 Italy
| | - Manuel Scimeca
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, 00133 Italy
| | - Giuseppe Sica
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, 00133 Italy
| | - Giuseppe Tisone
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, 00133 Italy
| | - Alessandro Mauriello
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, 00133 Italy
| | - Lixin Wei
- Department of Tumor Immunology and Gene Therapy Center, Third Affiliated Hospital of Naval Medical University, Shanghai, 200438 China
| | - Gerry Melino
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, 00133 Italy
| | - Yufang Shi
- The Third Affiliated Hospital of Soochow University, Institutes for Translational Medicine, State Key Laboratory of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou, Jiangsu China
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Moss CE, Phipps H, Wilson HL, Kiss-Toth E. Markers of the ageing macrophage: a systematic review and meta-analysis. Front Immunol 2023; 14:1222308. [PMID: 37520567 PMCID: PMC10373068 DOI: 10.3389/fimmu.2023.1222308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Accepted: 06/27/2023] [Indexed: 08/01/2023] Open
Abstract
Introduction Ageing research is establishing macrophages as key immune system regulators that undergo functional decline. Due to heterogeneity between species and tissue populations, a plethora of data exist and the power of scientific conclusions can vary substantially. This meta-analysis by information content (MAIC) and systematic literature review (SLR) aims to determine overall changes in macrophage gene and protein expression, as well as function, with age. Methods PubMed was utilized to collate peer-reviewed literature relating to macrophage ageing. Primary studies comparing macrophages in at least two age groups were included. Data pertaining to gene or protein expression alongside method used were extracted for MAIC analysis. For SLR analysis, data included all macrophage-specific changes with age, as well as species, ontogeny and age of groups assessed. Results A total of 240 studies were included; 122 of which qualified for MAIC. The majority of papers focussed on changes in macrophage count/infiltration as a function of age, followed by gene and protein expression. The MAIC found iNOS and TNF to be the most commonly investigated entities, with 328 genes and 175 proteins showing consistent dysregulation with age across the literature. Overall findings indicate that cytokine secretion and phagocytosis are reduced and reactive oxygen species production is increased in the ageing macrophage. Discussion Collectively, our analysis identifies critical regulators in macrophage ageing that are consistently dysregulated, highlighting a plethora of targets for further investigation. Consistent functional changes with age found here can be used to confirm an ageing macrophage phenotype in specific studies and experimental models.
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Affiliation(s)
- Charlotte E. Moss
- Department of Infection, Immunity and Cardiovascular Disease, Medical School, University of Sheffield, Sheffield, United Kingdom
- Healthy Lifespan Institute, University of Sheffield, Sheffield, United Kingdom
| | - Hew Phipps
- Department of Infection, Immunity and Cardiovascular Disease, Medical School, University of Sheffield, Sheffield, United Kingdom
| | - Heather L. Wilson
- Department of Infection, Immunity and Cardiovascular Disease, Medical School, University of Sheffield, Sheffield, United Kingdom
- Healthy Lifespan Institute, University of Sheffield, Sheffield, United Kingdom
| | - Endre Kiss-Toth
- Department of Infection, Immunity and Cardiovascular Disease, Medical School, University of Sheffield, Sheffield, United Kingdom
- Healthy Lifespan Institute, University of Sheffield, Sheffield, United Kingdom
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Lima C, Andrade-Barros AI, Carvalho FF, Falcão MAP, Lopes-Ferreira M. Inflammasome Coordinates Senescent Chronic Wound Induced by Thalassophryne nattereri Venom. Int J Mol Sci 2023; 24:ijms24098453. [PMID: 37176162 PMCID: PMC10179710 DOI: 10.3390/ijms24098453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 04/10/2023] [Accepted: 04/11/2023] [Indexed: 05/15/2023] Open
Abstract
Thalassophryne nattereri toadfish (niquim) envenomation, common in the hands and feet of bathers and fishermen in the north and northeast regions of Brazil, is characterized by local symptoms such as immediate edema and intense pain. These symptoms progress to necrosis that lasts for an extended period of time, with delayed healing. Wound healing is a complex process characterized by the interdependent role of keratinocytes, fibroblasts, and endothelial and innate cells such as neutrophils and macrophages. Macrophages and neutrophils are actively recruited to clear debris during the inflammatory phase of wound repair, promoting the production of pro-inflammatory mediators, and in the late stage, macrophages promote tissue repair. Our hypothesis is that injury caused by T. nattereri venom (VTn) leads to senescent wounds. In this study, we provide valuable information about the mechanism(s) behind the dysregulated inflammation in wound healing induced by VTn. We demonstrate in mouse paws injected with the venom the installation of γH2AX/p16Ink4a-dependent senescence with persistent neutrophilic inflammation in the proliferation and remodeling phases. VTn induced an imbalance of M1/M2 macrophages by maintaining a high number of TNF-α-producing M1 macrophages in the wound but without the ability to eliminate the persistent neutrophils. Chronic neutrophilic inflammation and senescence were mediated by cytokines such as IL-1α and IL-1β in a caspase-1- and caspase-11-dependent manner. In addition, previous blocking with anti-IL-1α and anti-IL-β neutralizing antibodies and caspase-1 (Ac YVAD-CMK) and caspase-11 (Wedelolactone) inhibitors was essential to control the pro-inflammatory activity of M1 macrophages induced by VTn injection, skewing towards an anti-inflammatory state, and was sufficient to block neutrophil recruitment and senescence.
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Affiliation(s)
- Carla Lima
- Immunoregulation Unit of the Laboratory of Applied Toxinology (CETICs/FAPESP), Butantan Institute, São Paulo 05503-009, Brazil
| | - Aline Ingrid Andrade-Barros
- Immunoregulation Unit of the Laboratory of Applied Toxinology (CETICs/FAPESP), Butantan Institute, São Paulo 05503-009, Brazil
| | - Fabiana Franco Carvalho
- Immunoregulation Unit of the Laboratory of Applied Toxinology (CETICs/FAPESP), Butantan Institute, São Paulo 05503-009, Brazil
| | - Maria Alice Pimentel Falcão
- Immunoregulation Unit of the Laboratory of Applied Toxinology (CETICs/FAPESP), Butantan Institute, São Paulo 05503-009, Brazil
| | - Monica Lopes-Ferreira
- Immunoregulation Unit of the Laboratory of Applied Toxinology (CETICs/FAPESP), Butantan Institute, São Paulo 05503-009, Brazil
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Preconditioned Mesenchymal Stromal Cell-Derived Extracellular Vesicles (EVs) Counteract Inflammaging. Cells 2022; 11:cells11223695. [PMID: 36429124 PMCID: PMC9688039 DOI: 10.3390/cells11223695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/17/2022] [Accepted: 11/18/2022] [Indexed: 11/23/2022] Open
Abstract
Inflammaging is one of the evolutionarily conserved mechanisms underlying aging and is defined as the long-term consequence of the chronic stimulation of the innate immune system. As macrophages are intimately involved in initiating and regulating the inflammatory process, their dysregulation plays major roles in inflammaging. The paracrine factors, and in particular extracellular vesicles (EVs), released by mesenchymal stromal cells (MSCs) retain immunoregulatory effects on innate and adaptive immune responses. In this paper, we demonstrate that EVs derived from MSCs preconditioned with hypoxia inflammatory cytokines exerted an anti-inflammatory role in the context of inflammaging. In this study, macrophages isolated from aged mice presented elevated pro-inflammatory factor levels already in basal conditions compared to the young counterpart, and this pre-activation status increased when cells were challenged with IFN-γ. EVs were able to attenuate the age-associated inflammation, inducing a decrease in the expression of TNF-α, iNOS, and the NADase CD38. Moreover, we demonstrate that EVs counteracted the mitochondrial dysfunction that affected the macrophages, reducing lipid peroxidation and hindering the age-associated impairment of mitochondrial complex I activity, oxygen consumption, and ATP synthesis. These results indicate that preconditioned MSC-derived EVs might be exploited as new anti-aging therapies in a variety of age-related diseases.
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11
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Hüsing AM, Wulfmeyer VC, Gaedcke S, Fleig SV, Rong S, DeLuca D, Haller H, Schmitt R, von Vietinghoff S. Myeloid CCR2 Promotes Atherosclerosis after AKI. J Am Soc Nephrol 2022; 33:1487-1500. [PMID: 35537780 PMCID: PMC9342642 DOI: 10.1681/asn.2022010048] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Accepted: 04/10/2022] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND The risk of cardiovascular events rises after AKI. Leukocytes promote atherosclerotic plaque growth and instability. We established a model of enhanced remote atherosclerosis after renal ischemia-reperfusion (IR) injury and investigated the underlying inflammatory mechanisms. METHODS Atherosclerotic lesions and inflammation were investigated in native and bone marrow-transplanted LDL receptor-deficient (LDLr-/- ) mice after unilateral renal IR injury using histology, flow cytometry, and gene expression analysis. RESULTS Aortic root atherosclerotic lesions were significantly larger after renal IR injury than in controls. A gene expression screen revealed enrichment for chemokines and their cognate receptors in aortas of IR-injured mice in early atherosclerosis, and of T cell-associated genes in advanced disease. Confocal microscopy revealed increased aortic macrophage proximity to T cells. Differential aortic inflammatory gene regulation in IR-injured mice largely paralleled the pattern in the injured kidney. Single-cell analysis identified renal cell types that produced soluble mediators upregulated in the atherosclerotic aorta. The analysis revealed a marked early increase in Ccl2, which CCR2+ myeloid cells mainly expressed. CCR2 mediated myeloid cell homing to the post-ischemic kidney in a cell-individual manner. Reconstitution with Ccr2-/- bone marrow dampened renal post-ischemic inflammation, reduced aortic Ccl2 and inflammatory macrophage marker CD11c, and abrogated excess aortic atherosclerotic plaque formation after renal IR. CONCLUSIONS Our data introduce an experimental model of remote proatherogenic effects of renal IR and delineate myeloid CCR2 signaling as a mechanistic requirement. Monocytes should be considered as mobile mediators when addressing systemic vascular sequelae of kidney injury.
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Affiliation(s)
- Anne M. Hüsing
- Division of Nephrology and Hypertension, Department of Internal Medicine, Hannover Medical School, Hannover, Germany
| | - Vera C. Wulfmeyer
- Division of Nephrology and Hypertension, Department of Internal Medicine, Hannover Medical School, Hannover, Germany
| | - Svenja Gaedcke
- German Centre for Lung Research, Hannover Medical School, Hannover, Germany
| | - Susanne V. Fleig
- Division of Nephrology and Hypertension, Department of Internal Medicine, Hannover Medical School, Hannover, Germany,Nephrology Section, Medical Clinic 1, University Hospital Bonn, Rheinische Friedrich Wilhelm University of Bonn, Bonn, Germany
| | - Song Rong
- Division of Nephrology and Hypertension, Department of Internal Medicine, Hannover Medical School, Hannover, Germany
| | - David DeLuca
- German Centre for Lung Research, Hannover Medical School, Hannover, Germany
| | - Hermann Haller
- Division of Nephrology and Hypertension, Department of Internal Medicine, Hannover Medical School, Hannover, Germany
| | - Roland Schmitt
- Division of Nephrology and Hypertension, Department of Internal Medicine, Hannover Medical School, Hannover, Germany
| | - Sibylle von Vietinghoff
- Division of Nephrology and Hypertension, Department of Internal Medicine, Hannover Medical School, Hannover, Germany,Nephrology Section, Medical Clinic 1, University Hospital Bonn, Rheinische Friedrich Wilhelm University of Bonn, Bonn, Germany
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12
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Abstract
Acute kidney injury (AKI) is a serious and highly prevalent disease, yet only supportive treatment is available. Nicotinamide adenine dinucleotide (NAD+) is a cofactor necessary for adenosine triphosphate (ATP) production and cell survival. Changes in renal NAD+ biosynthesis and energy utilization are features of AKI. Targeting NAD+ as an AKI therapy shows promising potential. However, the pursuit of NAD+-based treatments requires deeper understanding of the unique drivers and effects of the NAD+ biosynthesis derangements that arise in AKI. This article summarizes the NAD+ biosynthesis alterations in the kidney in AKI, chronic disease, and aging. To enhance this understanding, we explore instances of NAD+ biosynthesis alterations outside the kidney in inflammation, pregnancy, and cancer. In doing so, we seek to highlight that the different NAD+ biosynthesis pathways are not interconvertible and propose that the way in which NAD+ is synthesized may be just as important as the NAD+ produced.
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Affiliation(s)
- Amanda J Clark
- Division of Nephrology, Department of Medicine, University of Texas Southwestern, Dallas, TX; Division of Pediatric Nephrology, Department of Pediatrics, University of Texas Southwestern, Dallas, TX
| | - Marie Christelle Saade
- Division of Nephrology, Department of Medicine, University of Texas Southwestern, Dallas, TX
| | - Samir M Parikh
- Division of Nephrology, Department of Medicine, University of Texas Southwestern, Dallas, TX; Department of Pharmacology, University of Texas Southwestern, Dallas, TX.
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13
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Fan Z, Li Y, Xia L, Wu Y. Knockout of Bruton's tyrosine kinase in macrophages attenuates diabetic nephropathy in streptozotocin-induced mice. Am J Transl Res 2021; 13:12352-12363. [PMID: 34956457 PMCID: PMC8661227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 10/20/2021] [Indexed: 06/14/2023]
Abstract
As a cytoplasmic tyrosine kinase in the Tec family, Bruton's tyrosine kinase (Btk) participates in various biological processes, including cell growth, differentiation, and apoptosis. Although recent studies have indicated that Btk is involved in pro-inflammatory cytokine production, the underlying impact of Btk on the development and pathogenesis of diabetic nephropathy (DN) has not been elucidated. The aim of this study was to determine whether Btk knockout (KO) could reduce inflammation and kidney injury in DN. First, diabetic mice models were established via an intraperitoneal injection of streptozotocin. Thereafter, the underlying mechanism was explored by comparing Btk flox/flox Lyz-Cre mice to wild-type (C57BL/6N) mice. Albuminuria was significantly reduced, and kidney injuries were attenuated in Btk conditional deletion diabetic mice. More importantly, these changes were demonstrated to be associated with decreased levels of pro-inflammatory cytokines owing to the downregulation of the MAPK and NF-κB signaling pathways. Collectively, these findings indicate that Btk plays a critical role in the regulation of kidney inflammation and provides a prospective therapeutic strategy for the treatment of DN.
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Affiliation(s)
- Zhe Fan
- Department of Nephropathy, The First Affiliated Hospital of Anhui Medical UniversityHefei 230032, Anhui, China
| | - Yuanyuan Li
- Department of Nephropathy, The First Affiliated Hospital of Anhui Medical UniversityHefei 230032, Anhui, China
| | - Lingling Xia
- Department of Infective Disease, The First Affiliated Hospital of Anhui Medical UniversityHefei 230032, Anhui, China
| | - Yonggui Wu
- Department of Nephropathy, The First Affiliated Hospital of Anhui Medical UniversityHefei 230032, Anhui, China
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14
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Kim SR, Puranik AS, Jiang K, Chen X, Zhu XY, Taylor I, Khodadadi-Jamayran A, Lerman A, Hickson LJ, Childs BG, Textor SC, Tchkonia T, Niewold TB, Kirkland JL, Lerman LO. Progressive Cellular Senescence Mediates Renal Dysfunction in Ischemic Nephropathy. J Am Soc Nephrol 2021; 32:1987-2004. [PMID: 34135081 PMCID: PMC8455278 DOI: 10.1681/asn.2020091373] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 03/29/2021] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Peripheral vascular diseases may induce chronic ischemia and cellular injury distal to the arterial obstruction. Cellular senescence involves proliferation arrest in response to stress, which can damage neighboring cells. Renal artery stenosis (RAS) induces stenotic-kidney dysfunction and injury, but whether these arise from cellular senescenceand their temporal pattern remain unknown. METHODS Chronic renal ischemia was induced in transgenic INK-ATTAC and wild type C57BL/6 mice by unilateral RAS, and kidney function (in vivo micro-MRI) and tissue damage were assessed. Mouse healthy and stenotic kidneys were analyzed using unbiased single-cell RNA-sequencing. To demonstrate translational relevance, cellular senescence was studied in human stenotic kidneys. RESULTS Using intraperitoneal AP20187 injections starting 1, 2, or 4 weeks after RAS, selective clearance of cells highly expressing p16Ink4a attenuated cellular senescence and improved stenotic-kidney function; however, starting treatment immediately after RAS induction was unsuccessful. Broader clearance of senescent cells, using the oral senolytic combination dasatinib and quercetin, in C57BL/6 RAS mice was more effective in clearing cells positive for p21 (Cdkn1a) and alleviating renal dysfunction and damage. Unbiased, single-cell RNA sequencing in freshly dissociated cells from healthy and stenotic mouse kidneys identified stenotic-kidney epithelial cells undergoing both mesenchymal transition and senescence. As in mice, injured human stenotic kidneys exhibited cellular senescence, suggesting this process is conserved. CONCLUSIONS Maladaptive tubular cell senescence, involving upregulated p16 (Cdkn2a), p19 (Cdkn2d), and p21 (Cdkn1a) expression, is associated with renal dysfunction and injury in chronic ischemia. These findings support development of senolytic strategies to delay chronic ischemic renal injury.
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Affiliation(s)
- Seo Rin Kim
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota,Department of Nephrology and Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Amrutesh S. Puranik
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota,Colton Center for Autoimmunity, Division of Rheumatology, New York University Langone Medical Center, New York, New York
| | - Kai Jiang
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota
| | - Xiaojun Chen
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota,Department of Nephrology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Xiang-Yang Zhu
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota
| | - Ian Taylor
- FlowJo, BD Life Sciences, Ashland, Oregon
| | | | - Amir Lerman
- Department of Cardiology, Mayo Clinic, Rochester, Minnesota
| | - LaTonya J. Hickson
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota
| | - Bennett G. Childs
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota
| | - Stephen C. Textor
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota
| | - Tamara Tchkonia
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, Minnesota
| | - Timothy B. Niewold
- Colton Center for Autoimmunity, Division of Rheumatology, New York University Langone Medical Center, New York, New York
| | - James L. Kirkland
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, Minnesota
| | - Lilach O. Lerman
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota
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15
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Campbell RA, Docherty MH, Ferenbach DA, Mylonas KJ. The Role of Ageing and Parenchymal Senescence on Macrophage Function and Fibrosis. Front Immunol 2021; 12:700790. [PMID: 34220864 PMCID: PMC8248495 DOI: 10.3389/fimmu.2021.700790] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 06/07/2021] [Indexed: 02/06/2023] Open
Abstract
In this review, we examine senescent cells and the overlap between the direct biological impact of senescence and the indirect impact senescence has via its effects on other cell types, particularly the macrophage. The canonical roles of macrophages in cell clearance and in other physiological functions are discussed with reference to their functions in diseases of the kidney and other organs. We also explore the translational potential of different approaches based around the macrophage in future interventions to target senescent cells, with the goal of preventing or reversing pathologies driven or contributed to in part by senescent cell load in vivo.
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Affiliation(s)
- Ross A. Campbell
- Centre for Inflammation Research, Queen’s Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Marie-Helena Docherty
- Centre for Inflammation Research, Queen’s Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
- Department of Renal Medicine, Royal Infirmary of Edinburgh, Edinburgh, United Kingdom
| | - David A. Ferenbach
- Centre for Inflammation Research, Queen’s Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
- Department of Renal Medicine, Royal Infirmary of Edinburgh, Edinburgh, United Kingdom
| | - Katie J. Mylonas
- Centre for Inflammation Research, Queen’s Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
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16
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Selective Cardiomyocyte Oxidative Stress Leads to Bystander Senescence of Cardiac Stromal Cells. Int J Mol Sci 2021; 22:ijms22052245. [PMID: 33668142 PMCID: PMC7956294 DOI: 10.3390/ijms22052245] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 02/17/2021] [Accepted: 02/19/2021] [Indexed: 12/24/2022] Open
Abstract
Accumulation of senescent cells in tissues during normal or accelerated aging has been shown to be detrimental and to favor the outcomes of age-related diseases such as heart failure (HF). We have previously shown that oxidative stress dependent on monoamine oxidase A (MAOA) activity in cardiomyocytes promotes mitochondrial damage, the formation of telomere-associated foci, senescence markers, and triggers systolic cardiac dysfunction in a model of transgenic mice overexpressing MAOA in cardiomyocytes (Tg MAOA). However, the impact of cardiomyocyte oxidative stress on the cardiac microenvironment in vivo is still unclear. Our results showed that systolic cardiac dysfunction in Tg MAOA mice was strongly correlated with oxidative stress induced premature senescence of cardiac stromal cells favoring the recruitment of CCR2+ monocytes and the installation of cardiac inflammation. Understanding the interplay between oxidative stress induced premature senescence and accelerated cardiac dysfunction will help to define new molecular pathways at the crossroad between cardiac dysfunction and accelerated aging, which could contribute to the increased susceptibility of the elderly to HF.
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