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Activation of T Lym...
Activation of T Lymphocytes as a Novel Mechanism in Beta1-Adrenergic Receptor Autoantibody-Induced Cardiac Remodeling
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Du, Y. (author)
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Li, X. (author)
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Yu, H. (author)
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Yan, L. (author)
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Lau, W. B. (author)
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Zhang, S. (author)
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Qin, Y. (author)
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Wang, W. (author)
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Ma, X. (author)
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Liu, H. (author)
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- Fu, Michael, 1963 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för molekylär och klinisk medicin,Institute of Medicine, Department of Molecular and Clinical Medicine
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(creator_code:org_t)
- 2019-02-12
- 2019
- English.
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In: Cardiovascular Drugs and Therapy. - : Springer Science and Business Media LLC. - 0920-3206 .- 1573-7241. ; 33:2, s. 149-161
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https://doi.org/10.1...
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Abstract
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- Background: Numerous studies have reported significantly elevated titers of serum autoantibody against the second extracellular loop of β 1 -adrenoceptor (β 1 -AA), a catecholamine-like substance with β 1 -adrenergic activity, in patients with heart failure. Although evidence demonstrates that this autoantibody may alter T cell proliferation and secretion, the role of T lymphocytes in heart failure induced by β 1 -AA remains unclear. The current study was designed to determine whether T cell disorder contributes to heart failure induced by β 1 -AA. Methods and Results: β 1 -AA monoclonal antibodies (β 1 -AAmAb) produced using the hybridoma technique were administered in wild-type mice or T lymphocyte deficiency nudes for 12weeks. T lymphocytes from heart failure patients and neonatal cardiomyocytes were utilized in vitro. Mouse protein antibody array analysis was employed to detect the cytokines responsible for β 1 -AAmAb-induced heart failure. Compared to wild-type mice, T lymphocyte deficiency mice prevented cardiac function from getting worse, attenuated adverse remodeling, and ameliorated cardiomyocyte apoptosis and fibrosis. As shown by protein array, the serum level of interleukin (IL)-6 was significantly lower in the nude group as compared to wild-type after β 1 -AAmAb treatment. Mechanistic studies in vitro demonstrated that T lymphocyte culture supernatants stimulated by β 1 -AAmAb caused direct damage in the cardiomyocytes, and β 1 -AAmAb promoted proliferation of T lymphocytes isolated from patients with heart failure and increased IL-6 release. IL-6-specific siRNA virtually abolished cardiomyocyte apoptosis, suggesting that IL-6 may be a key cytokine released by T lymphocytes and responsible for β 1 -AAmAb-induced cardiac remodeling. Conclusions: Collectively, we demonstrate that β 1 -AAmAb-induced cardiac remodeling via mediating T lymphocyte disorder and releasing a variety of IL-6. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Kardiologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Cardiac and Cardiovascular Systems (hsv//eng)
Keyword
- Autoantibody
- Beta-1
- Receptors adrenergic
- Remodeling
- T lymphocytes
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Du, Y.
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Li, X.
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Yu, H.
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Yan, L.
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Lau, W. B.
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Zhang, S.
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show more...
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Qin, Y.
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Wang, W.
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Ma, X.
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Liu, H.
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Fu, Michael, 196 ...
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show less...
- About the subject
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- MEDICAL AND HEALTH SCIENCES
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MEDICAL AND HEAL ...
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and Clinical Medicin ...
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and Cardiac and Card ...
- Articles in the publication
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Cardiovascular D ...
- By the university
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University of Gothenburg