Abstract
The pathogenic roles of inflammatory T cells and monocytes subsets have not been explored in different manifestations of coronary artery disease. We studied the frequency of these cells, their response to autoantigens, regulatory cell functional assay, foam cell formation and macrophage differentiation in 181 patients (stable angina, ST-elevated myocardial infarction (STEMI), NSTEMI, and unstable angina), and 34 controls and in samples collected during recurrent cardiac events and from patients showing clinical improvement. The proportion of Th17 cells and monocytes gradually increased in patients with stable angina at one end of the spectrum followed by NSTEMI, STEMI, and unstable angina at other end. Inflammatory cells were positively and inversely associated with recurrent events and clinical improvement, respectively. Patients showed expansion of Th17 cells in response to autoantigen (HSP60) and compromised Treg function. Our results suggest that stress-induced activation of inflammatory cells expands in the absence of regulatory control in CAD patients.
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Acknowledgments
We are extremely grateful to Late Professor Vijay V Kakkar, Scientific Chairman, Thrombosis Research Institute, Bangalore, for his constant encouragement and support.. The support from Bharathi foundation for Ph.D. students is gratefully acknowledged.
Funding
Research grants were from Tata Social Welfare Trust, India, (TSWT/IG/SNB/JP/Sdm) and Indian Council of Medical Research (ICMR) Government of India (5/4/1-4/11-NCD-II).
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The study was planned by LM and executed by TP. SKV was the cardiologist who identified and classified the patients, while RM was the clinical coordinator to collect the sample demographic data and follow-up. The draft of the MS was written by TP with inputs from other authors and finally corrected by LM.
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The investigation was approved by the Institutional ethics committees of Thrombosis research Institute and Narayana Hrudayalaya hospital and conformed to the Declaration of Helsinki and the Indian Council of medical research (ICMR, India) guidelines.
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All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2000 (5). Informed consent was obtained from all patients for being included in the study.
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Informed consent was obtained from all participants included in the study.
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Ponnusamy, T., Komarulu Venkatachala, S., Ramanujappa, M. et al. Loss of Regulatory Immune Function in Coronary Artery Disease Patients from the Indian Population. J. of Cardiovasc. Trans. Res. 12, 378–388 (2019). https://doi.org/10.1007/s12265-019-09872-7
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DOI: https://doi.org/10.1007/s12265-019-09872-7