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Sattler S. Is ischaemic heart failure an autoimmune disease? ESC Heart Fail 2024; 11:611-614. [PMID: 38152948 DOI: 10.1002/ehf2.14636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Accepted: 11/28/2023] [Indexed: 12/29/2023] Open
Affiliation(s)
- Susanne Sattler
- National Heart and Lung Institute, Imperial College London, Hammersmith Campus, Du Cane Road, London, W12 0NN, UK
- Department of Pharmacology, Otto-Loewi Research Center, Medical University of Graz, Graz, Austria
- Department of Cardiology, LKH-Univ. Klinikum Graz, Medical University of Graz, Graz, Austria
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DeBerge M, Yu S, Dehn S, Ifergan I, Yeap XY, Filipp M, Becker A, Luo X, Miller S, Thorp EB. Monocytes prime autoreactive T cells after myocardial infarction. Am J Physiol Heart Circ Physiol 2019; 318:H116-H123. [PMID: 31809213 DOI: 10.1152/ajpheart.00595.2019] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
In humans, loss of central tolerance for the cardiac self-antigen α-myosin heavy chain (α-MHC) leads to circulation of cardiac autoreactive T cells and renders the heart susceptible to autoimmune attack after acute myocardial infarction (MI). MI triggers profound tissue damage, releasing danger signals and self-antigen by necrotic cardiomyocytes, which lead to recruitment of inflammatory monocytes. We hypothesized that excessive inflammation by monocytes contributes to the initiation of adaptive immune responses to cardiac self-antigen. Using an experimental model of MI in α-MHC-mCherry reporter mice, which specifically express mCherry in cardiomyocytes, we detected α-MHC antigen in myeloid cells in the heart-draining mediastinal lymph node (MLN) 7 days after MI. To test whether monocytes were required for cardiac self-antigen trafficking to the MLN, we blocked monocyte recruitment with a C-C motif chemokine receptor type 2 (CCR2) antagonist or immune modifying nanoparticles (IMP). Blockade of monocyte recruitment reduced α-MHC antigen detection in the MLN after MI. Intramyocardial injection of the model antigen ovalbumin into OT-II transgenic mice demonstrated the requirement for monocytes in antigen trafficking and T-cell activation in the MLN. Finally, in nonobese diabetic mice, which are prone to postinfarction autoimmunity, blockade of monocyte recruitment reduced α-MHC-specific responses leading to improved tissue repair and ventricular function 28 days after MI. Taken together, these data support a role for monocytes in the onset of pathological cardiac autoimmunity following MI and suggest that therapeutic targeting of monocytes may mitigate postinfarction autoimmunity in humans.NEW & NOTEWORTHY Our study newly identifies a role for inflammatory monocytes in priming an autoimmune T-cell response after myocardial infarction. Select inhibition of monocyte recruitment to the infarct prevents trafficking of cardiac self-antigen and activation of cardiac myosin reactive T cells in the heart-draining lymph node. Therapeutic targeting of inflammatory monocytes may limit autoimmune responses to improve cardiac remodeling and preserve left ventricular function after myocardial infarction.
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Affiliation(s)
- Matthew DeBerge
- Department of Pathology, Northwestern University, Chicago, Illinois.,Feinberg Cardiovascular and Renal Research Institute, Northwestern University, Chicago, Illinois
| | - Shuangjin Yu
- Division of Nephrology, Department of Medicine, Duke University, Durham, North Carolina
| | - Shirley Dehn
- Department of Pathology, Northwestern University, Chicago, Illinois.,Feinberg Cardiovascular and Renal Research Institute, Northwestern University, Chicago, Illinois
| | - Igal Ifergan
- Department of Microbiology and Immunology, Northwestern University, Chicago, Illinois
| | - Xin Yi Yeap
- Department of Pathology, Northwestern University, Chicago, Illinois.,Feinberg Cardiovascular and Renal Research Institute, Northwestern University, Chicago, Illinois
| | - Mallory Filipp
- Department of Pathology, Northwestern University, Chicago, Illinois.,Feinberg Cardiovascular and Renal Research Institute, Northwestern University, Chicago, Illinois
| | - Amanda Becker
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois.,Heart Center at Stanley Manne Research Institute at Lurie Children's Hospital, Chicago, Illinois
| | - Xunrong Luo
- Division of Nephrology, Department of Medicine, Duke University, Durham, North Carolina
| | - Stephen Miller
- Department of Microbiology and Immunology, Northwestern University, Chicago, Illinois
| | - Edward B Thorp
- Department of Pathology, Northwestern University, Chicago, Illinois.,Feinberg Cardiovascular and Renal Research Institute, Northwestern University, Chicago, Illinois.,Heart Center at Stanley Manne Research Institute at Lurie Children's Hospital, Chicago, Illinois
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