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Lymphocyte Cytotoxicity of oxLDL in Patients with Atherosclerosis | ||
| Iranian Journal of Immunology | ||
| مقاله 4، دوره 8، شماره 1، خرداد 2011، صفحه 27-33 اصل مقاله (121.41 K) | ||
| نوع مقاله: Original Article | ||
| نویسندگان | ||
| Mohammad Jafar Mahmoudi1؛ Maryam Mahmoudi2؛ Fereydoon Siassi2؛ Fazel Shokri3؛ Mohammad Reza Eshraghian4؛ Amir Hassan Zamani5؛ Reza Chahardoli2؛ Mona Hedayat6؛ Jalal Khoshnoodi3؛ Hashem Nayeri7؛ Nima Rezaei6، 8؛ Ali-Akbar Saboor-Yaraghi* 2 | ||
| 1Division of Cardiology, Department of Internal Medicine, School of Medicine | ||
| 2Department of Nutrition and Biochemistry | ||
| 3Department of Immunology | ||
| 4Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences | ||
| 5Nanobiotechnology Research Center, Avicenna Research Institute, ACECR | ||
| 6Molecular Immunology Research Center, School of Medicine, Tehran University of Medical Sciences | ||
| 7Falavarjan Islamic Azad University, Falavarjan, Isfahan | ||
| 8Research Center for Immunodeficiencies, Pediatrics Center of Excellence, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran | ||
| چکیده | ||
| Background: Atherosclerosis, a chronic inflammatory disease of the vessel wall is characterized by local and systemic immune responses to a variety of antigens. Oxidized low-density lipoprotein (oxLDL) is considered as an important determining factor in the pathogenesis of atherosclerosis. Objective: The purpose of this study was to investigate the degree of peripheral blood mononuclear cells (PBMC) vulnerability to in vitro oxLDL-induced cytotoxicity from atherosclerotic patients in comparison to healthy individuals. Methods: Thirty patients with atherosclerotic lesions, confirmed by angiography, and 30 matched healthy individuals were investigated. PBMC was prepared from individuals' blood samples which were further stimulated with low dose (1 μg/mL) and high dose (50 μg/mL) of extensively oxidized LDL. MTT assay was utilized to measure cell viability and proliferation. Stimulation index (SI) was calculated as mean ratio of optical density (OD) of the stimulated cells divided by OD of untreated cells. Results: Low dose oxLDL treatment caused no significant proliferative or cytotoxic effect in the control group; however, similar treatment caused significant cytotoxic effect in the patient group compared to the controls (p=0.026). High dose oxLDL treatment induced more significant cytotoxicity in the patient compared to the control group (p=0.006). Comparison of the SI between the two groups of patients and controls showed significantly lower index by either the low (p=0.03) or the high dose (p<0.001) oxLDL in the patients compared to the controls. Conclusions: PBMC from patients with atherosclerosis showed increased susceptibility to oxLDL-induced cytotoxicity. Our results imply that prolonged exposure to elevated levels of circulating oxLDL could weaken the cellular defense mechanisms by progressive depletion of the pool of antiapoptotic proteins, rendering the cells more vulnerable to oxLDL-induced cell death. | ||
| کلیدواژهها | ||
| Atherosclerosis؛ Cytotoxicity؛ oxLDL؛ Peripheral Blood Mononuclear Cells | ||
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