alexa Impact Of Cigarette Smoke Exposure On Cardiac Function: Demonstration By Animal Models | 16670
ISSN: 2155-9880

Journal of Clinical & Experimental Cardiology
Open Access

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4th International Conference on Clinical & Experimental Cardiology
April 14-16, 2014 Hilton San Antonio Airport, TX, USA

Ashwani Khanna
Accepted Abstracts: J Clin Exp Cardiolog
DOI: 10.4172/2155-9880.S1.021
Abstract
It is difficult to study the effect of cigarette smoke on humans in a systematic way; therefore, we studied the effect of cigarette smoke exposure on cardiac transplant survival and the development of myocardial infarction in rat models. In this experimental study, we investigated early consequences of tobacco smoke exposure in cardiac transplant donors and recipients with an emphasis on alloinflammatory mediators of graft outcome using heterotopic rat cardiac transplantation; we tested the effects of donor or recipient tobacco smoke exposure. Our experiments reveal that pre-transplantation tobacco exposure in donors and/or recipients results in heightened systemic inflammation and increased oxidative stress reduces post-transplantation cardiac allograft survival. Our studies with cigarettes without nicotine demonstrated significantly lesser detrimental effects on cardiac transplant survival. The contribution of chronic tobacco exposure in determining post-myocardial infarction (MI) left ventricular (LV) remodeling and possible therapeutic strategies has not been investigated systematically. In this small animal investigation, we demonstrate that a significantly increased LV end-systolic diameter was observed in tobacco-exposed sham compared to tobacco-na?ve sham, and tobacco-exposed MI compared to tobacco-na?ve MI rats. The treatment of tobacco-exposed MI rats with NAC resulted in significantly increased levels expression of antioxidantsas well as circulating levels of glutathione, where the levels were almost identical to the tobacco-na?ve sham rats. These findings identify a novel post-infarction therapy for amelioration of the adverse effects of tobacco exposure on the infracted myocardium and advocate the use of dietary supplement antioxidants for habitual smokers to prevent and reverse cardiovascular adverse effects in the absence of successful achievement of cessation of smoking.
Biography
Ashwani Khanna completed his Ph.D. degree with studies in Rheumatic Heart Disease at the age of 27 from Postgraduate Institute of Medical Education and Research, Chandigarh, India. His original studies have described the mechanism of immunosuppressive drugs clinically used to treat organ transplant recipients. He has developed therapeutic recombinant proteins, monoclonal antibodies and molecular diagnostic assays. He is author of 100 scientific publications and a patent. He is a regular member of NIH study section, reviewer for scientific journals and member of editorial board of a journal.
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