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Sintou A, Mansfield C, Iacob A, Chowdhury RA, Narodden S, Rothery SM, Podovei R, Sanchez-Alonso JL, Ferraro E, Swiatlowska P, Harding SE, Prasad S, Rosenthal N, Gorelik J, Sattler S. Mediastinal Lymphadenopathy, Class-Switched Auto-Antibodies and Myocardial Immune-Complexes During Heart Failure in Rodents and Humans. Front Cell Dev Biol 2020; 8:695. [PMID: 32850816 PMCID: PMC7426467 DOI: 10.3389/fcell.2020.00695] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 07/08/2020] [Indexed: 11/13/2022] Open
Abstract
Mediastinal lymphadenopathy and auto-antibodies are clinical phenomena during ischemic heart failure pointing to an autoimmune response against the heart. T and B cells have been convincingly demonstrated to be activated after myocardial infarction, a prerequisite for the generation of mature auto-antibodies. Yet, little is known about the immunoglobulin isotype repertoire thus pathological potential of anti-heart auto-antibodies during heart failure. We obtained human myocardial tissue from ischemic heart failure patients and induced experimental MI in rats. We found that anti-heart autoimmunity persists during heart failure. Rat mediastinal lymph nodes are enlarged and contain active secondary follicles with mature isotype-switched IgG2a B cells. Mature IgG2a auto-antibodies specific for cardiac antigens are present in rat heart failure serum, and IgG and complement C3 deposits are evident in heart failure tissue of both rats and human patients. Previously established myocardial inflammation, and the herein provided proof of B cell maturation in lymph nodes and myocardial deposition of mature auto-antibodies, provide all the hallmark signs of an established autoimmune response in chronic heart failure.
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Affiliation(s)
- Amalia Sintou
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Catherine Mansfield
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Alma Iacob
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
- Royal Brompton Hospital, Royal Brompton and Harefield NHS Foundation Trust, London, United Kingdom
| | - Rasheda A. Chowdhury
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Salomon Narodden
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Stephen M. Rothery
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Robert Podovei
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | | | - Elisa Ferraro
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Pamela Swiatlowska
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Sian E. Harding
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Sanjay Prasad
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
- Royal Brompton Hospital, Royal Brompton and Harefield NHS Foundation Trust, London, United Kingdom
| | - Nadia Rosenthal
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
- The Jackson Laboratory, Bar Harbor, ME, United States
| | - Julia Gorelik
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Susanne Sattler
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
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