Coronary Artery Disease Is Associated with an Increased Amount of T Lymphocytes in Human Epicardial Adipose Tissue

Author:

Mráz Miloš12,Cinkajzlová Anna23,Kloučková Jana23,Lacinová Zdeňka23,Kratochvílová Helena23,Lipš Michal4,Pořízka Michal4,Kopecký Petr4,Pierzynová Aneta5,Kučera Tomáš5,Melenovský Vojtěch6,Stříž Ilja7,Lindner Jaroslav8,Haluzík Martin123ORCID

Affiliation:

1. Diabetes Centre, Institute for Clinical and Experimental Medicine, Prague, Czech Republic

2. Department of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University and General University Hospital, Prague, Czech Republic

3. Centre for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic

4. Department of Anaesthesiology, Resuscitation and Intensive Medicine, First Faculty of Medicine, Charles University and General University Hospital, Prague, Czech Republic

5. Institute of Histology and Embryology, First Faculty of Medicine, Charles University, Prague, Czech Republic

6. Cardiology Department, Cardiac Centre, Institute for Clinical and Experimental Medicine, Prague, Czech Republic

7. Department of Clinical and Transplantation Immunology, Institute for Clinical and Experimental Medicine, Prague, Czech Republic

8. 2nd Department of Surgery-Department of Cardiovascular Surgery, Charles University and General University Hospital, Prague, Czech Republic

Abstract

Immunocompetent cells including lymphocytes play a key role in the development of adipose tissue inflammation and obesity-related cardiovascular complications. The aim of the study was to explore the relationship between epicardial adipose tissue lymphocytes and coronary artery disease (CAD). To this end, we studied the content and phenotype of lymphocytes in peripheral blood, subcutaneous adipose tissue (SAT), and epicardial adipose tissue (EAT) in subjects with and without CAD undergoing elective cardiac surgery. Eleven subjects without CAD (non-CAD group) and 22 age-, BMI-, and HbA1C-matched individuals with CAD were included into the study. Blood, SAT, and EAT samples were obtained at the beginning of surgery. Lymphocyte populations were quantified as % of CD45+ cells using flow cytometry. Subjects with CAD had a higher total lymphocyte amount in EAT compared with SAT (32.24±7.45 vs. 11.22±1.34%, p=0.025) with a similar trend observed in non-CAD subjects (29.68±7.61 vs. 10.13±2.01%, p=0.067). T (CD3+) cells were increased (75.33±2.18 vs. 65.24±4.49%, p=0.032) and CD3- cells decreased (21.17±2.26 vs. 31.64±4.40%, p=0.028) in EAT of CAD relative to the non-CAD group. In both groups, EAT showed an elevated percentage of B cells (5.22±2.43 vs. 0.96±0.21%, p=0.039 for CAD and 12.49±5.83 vs. 1.16±0.19%, p=0.016 for non-CAD) and reduced natural killer (NK) cells (5.96±1.32 vs. 13.22±2.10%, p=0.012 for CAD and 5.32±1.97 vs. 13.81±2.72%, p=0.022 for non-CAD) relative to SAT. In conclusion, epicardial adipose tissue in subjects with CAD shows an increased amount of T lymphocytes relative to non-CAD individuals as well as a higher number of total and B lymphocytes and reduced NK cells as compared with corresponding SAT. These changes could contribute to the development of local inflammation and coronary atherosclerosis.

Funder

Ministerstvo Zdravotnictví Ceské Republiky

Publisher

Hindawi Limited

Subject

Cell Biology,Immunology

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