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Title: Expression of cardiac proteins in neonatal cardiomyocytes on PGS/fibrinogen core/shell substrate for Cardiac tissue engineering
Authors: Ravichandran, R.
Venugopal, J.R. 
Sundarrajan, S. 
Mukherjee, S.
Sridhar, R.
Ramakrishna, S. 
Keywords: Cardiac tissue engineering
Core/shell fibers
Myocardial infarction
Issue Date: 20-Aug-2013
Citation: Ravichandran, R., Venugopal, J.R., Sundarrajan, S., Mukherjee, S., Sridhar, R., Ramakrishna, S. (2013-08-20). Expression of cardiac proteins in neonatal cardiomyocytes on PGS/fibrinogen core/shell substrate for Cardiac tissue engineering. International Journal of Cardiology 167 (4) : 1461-1468. ScholarBank@NUS Repository.
Abstract: Background: Heart failure due to myocardial infarction remains the leading cause of death worldwide owing to the inability of myocardial tissue regeneration. The aim of this study is to develop a core/shell fibrous cardiac patch having desirable mechanical properties and biocompatibility to engineer the infarcted myocardium. Method: We fabricated poly(glycerol sebacate)/fibrinogen (PGS/fibrinogen) core/shell fibers with core as elastomeric PGS provides suitable mechanical properties comparable to that of native tissue and shell as fibrinogen to promote cell-biomaterial interactions. The PGS/fibrinogen core/shell fibers and fibrinogen nanofibers were characterized by SEM, contact angle and tensile testing to analyze the fiber morphology, wettability, and mechanical properties of the scaffold. The cell-scaffold interactions were analyzed using isolated neonatal cardiomyocytes for cell proliferation, confocal analysis for the expression of marker proteins α-actinin, Troponin-T, β-myosin heavy chain and connexin 43 and SEM analysis for cell morphology. Results: We observed PGS/fibrinogen core/shell fibers had a Young's modulus of about 3.28 ± 1.7 MPa, which was comparable to that of native myocardium. Neonatal cardiomyocytes cultured on these scaffolds showed normal expression of cardiac specific marker proteins α-actinin, Troponin, β-myosin heavy chain and connexin 43 to prove PGS/fibrinogen core/shell fibers have potential for cardiac tissue engineering. Conclusion: Results indicated that neonatal cardiomyocytes formed predominant gap junctions and expressed cardiac specific marker proteins on PGS/fibrinogen core/shell fibers compared to fibrinogen nanofibers, indicating PGS/fibrinogen core/shell fibers may serve as a suitable cardiac patch for the regeneration of infarcted myocardium. © 2012 Elsevier Ireland Ltd.
Source Title: International Journal of Cardiology
ISSN: 01675273
DOI: 10.1016/j.ijcard.2012.04.045
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