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Year : 2020  |  Volume : 151  |  Issue : 6  |  Page : 554-561

Pathogenic gene expression of epicardial adipose tissue in patients with coronary artery disease

1 Department of Physiology, NKP Salve Institute of Medical Sciences & Research Center, Nagpur, Maharashtra, India
2 Department of Medicine, Dew Medicare & Trinity Hospital, Nagpur, Maharashtra, India
3 Environmental Health Division, CSIR-National Environmental Engineering Research Institute, Nagpur, Maharashtra, India
4 Department of Cardiothoracic Surgery, Dr. K.G. Deshpande Memorial Centre, Nagpur, Maharashtra, India

Correspondence Address:
Dr Anagha Vinay Sahasrabuddhe
Department of Physiology, NKP Salve Institute of Medical Sciences & Research Centre, Nagpur 440 019, Maharashtra
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ijmr.IJMR_1374_18

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Background & objectives: Coronary artery disease (CAD), a leading cause of mortality and morbidity worldwide has multifactorial origin. Epicardial adipose tissue (EAT) has complex mechanical and thermogenic functions and paracrine actions via various cytokines released by it, which can have both pro- and anti-inflammatory actions on myocardium and adjacent coronaries. The alteration of EAT gene expression in CAD is speculated, but poorly understood. This study was undertaken to find out the difference in gene expression of epicardial fat in CAD and non-CAD patients. Methods: Twenty seven patients undergoing coronary artery bypass graft (CABG) and 16 controls (non-CAD patients undergoing valvular heart surgeries) were included in the study and their EAT samples were obtained. Gene expressions of uncoupling protein-1, monocyte chemoattractant protein-1 (MCP-1), adiponectin, adenosine A1 receptor (ADORA-1), vascular cell adhesion molecule-1 (VCAM-1) and tumour necrosis factor-alpha (TNF-α) were studied by real-time reverse transcription-polymerase chain reaction. Glucose, insulin, lipid profile, high-sensitivity C-reactive protein, homocysteine, vitamin D, TNF-α and leptin levels were estimated in fasting blood samples and analyzed. Results: Leptin levels were significantly higher in CABG group as compared to controls (P <0.05), whereas other metabolic parameters were not significantly different between the two groups. MCP-1, VCAM-1 and TNF-α were upregulated in the CABG group as compared to controls. Further, multivariate analysis showed significantly reduced adjusted odds ratio for MCP-1 [0.27; 95% confidence interval: 0.08-0.91] in the CABG group as compared to controls (P <0.05). Interpretation & conclusions: Our findings showed an alteration in EAT gene expression in CAD patients with significant upregulation of MCP-1. Further studies with a large sample need to be done to confirm these findings.

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