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The Anatolian Journal of Cardiology Lymphocyte Subsets in Patients with İdiopathic Dilated Cardiomyopathy [Anatol J Cardiol]
Anatol J Cardiol. 2001; 1(2): 98-100

Lymphocyte Subsets in Patients with İdiopathic Dilated Cardiomyopathy

Abdi Bozkurt1, Abdullah Canataroğlu2, Salih Çetiner3, Yurdaer Dönmez1, Ayhan Usal4, Mustafa Demirtaş1
1Department of Cardiology Çukurova University Faculty of Medicine, Adana
2Department of Internal Medicine Çukurova University Faculty of Medicine, Adana
3Department of Central Laboratory Immunology Section Çukurova University Faculty of Medicine, Adana
4Çukurova University School of Medicine, Department of Cardiology

Objective: Although chronic myocardial inflammatory process mediated by viral and autoimmune factors has been postulated in the pathogenesis of idiopathic dilated cardiomyopathy (IDC), the role of autoimmune mechanisms still remains unclear. The aim of the present study was to investigate the rates of various T cell subsets and natural killer (NK) cells in peripheral blood in order to see whether they had a role in the immunoregulation of IDC. Methods: The surface markers of peripheral T and B lymphocytes were detected and percentages of pan T and B cells as well as helper (CD4+) and suppressor (CD8+) T lymphocytes subsets in the peripheral blood and their ratio (CD4+/CD8+) were determined in 27 patients with IDC and in 20 healthy controls. NK cell percentage was also studied. Results: There were no significant differences between IDC and control groups with respect to T and B cell percentages. The percentages of CD4+ T cell subsets were similar in both groups (48.7±8.7 % vs. 43.5±9.7 % respectively; p=0.107). CD8+ T cell percentage was significantly decreased in patients with IDC than in controls (22.6±7.7 % vs. 28.2±8.2 %, respectively; p=0.044). CD4+/CD8+ ratio was markedly higher in patients with IDC than controls (2.6±1.8 vs. 1.6±0.6, respectively; p=0.006). There was no significant difference in the NK cell percentage between groups. Conclusion: Decreased CD8+ T cell subset is the cause of increased CD4+/CD8+ ratio, which may imply decreased self-tolerance and an immunoregulatory defect in the pathogenesis of IDC.

Keywords: Idiopathic dilated cardiomyopathy, T lymphocyte subsets

Abdi Bozkurt, Abdullah Canataroğlu, Salih Çetiner, Yurdaer Dönmez, Ayhan Usal, Mustafa Demirtaş. Lymphocyte Subsets in Patients with İdiopathic Dilated Cardiomyopathy. Anatol J Cardiol. 2001; 1(2): 98-100