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Non-specific autoantibodies in cardiomyopathies and myocardial infarction
E I Syrigou1, M M Konstandoulakis, K N Syrigos
1Laboratory of Immunology and Molecular Biology, Hippokration Hospital, Athens Medical School, Greece.
Insights
Autoimmune mechanisms are important in cardiomyopathies. Elevated autoantibodies against dsDNA, ssDNA, and cardiolipin were found in patients with dilated and hypertrophic cardiomyopathy, suggesting a diagnostic role.
Area of Science:
- Cardiology
- Immunology
- Pathogenesis of Heart Disease
Background:
- Cardiomyopathies encompass a group of heart muscle diseases.
- Autoimmune mechanisms are increasingly recognized in various cardiovascular conditions.
Purpose of the Study:
- To evaluate the significance of autoimmune mechanisms in dilated cardiomyopathy (DCM) and hypertrophic cardiomyopathy (HCM).
- To assess the presence and levels of autoantibodies against dsDNA, ssDNA, and cardiolipin in cardiomyopathy patients.
Main Methods:
- Sera from 22 DCM patients, 23 HCM patients, 24 myocardial infarction patients, and 40 healthy controls were analyzed.
- An immunoassay method was employed to detect autoantibodies, specifically IgG subtypes, against dsDNA, ssDNA, and cardiolipin.
Main Results:
- A high percentage of cardiomyopathy patients (30-50%) exhibited elevated autoantibody levels, compared to 5% in the control group.
- Significantly higher incidences of these autoantibodies were observed in both DCM and HCM patient groups.
- Elevated autoantibodies were predominantly of the IgG subtype.
Conclusions:
- Autoimmune mechanisms appear to play a significant role in the pathogenesis of cardiomyopathies.
- Detection of these autoantibodies may aid in understanding cardiomyopathy development.
- Autoantibody detection could serve as a valuable tool for diagnosis, patient follow-up, and prognosis in cardiomyopathies.
Abstract:
In the present study we evaluated the importance of autoimmune mechanisms in cardiomyopathies. Sera from 22 patients with dilated cardiomyopathy, 23 patients with hypertrophic cardiomyopathy, 24 patients with myocardial infarction and 40 apparently healthy blood donors were tested with an immunoassay method for the presence of autoantibodies against dsDNA, ssDNA and cardiolipin. Elevated values of autoantibodies, mainly of the IgG subtype, were obtained in a high percentage of patients with cardiomyopathy (30-50%), as compared to the control group (5%). The incidence of these autoantibodies has been found significantly high in both groups of dilated and hypertrophic cardiomyopathies. Although further investigation is needed, it is concluded that the detection of these autoantibodies may contribute in the better understanding of the pathogenesis of cardiomyopathies and could be a useful tool for the diagnosis, follow up and prognosis of these patients.