Engineering an in vitro organotypic model for studying cardiac hypertrophy

Jain, Aditi and Hasan, Jafar and Desingu, Perumal Arumugam and Sundaresan, Nagalingam R and Chatterjee, Kaushik (2018) Engineering an in vitro organotypic model for studying cardiac hypertrophy. In: COLLOIDS AND SURFACES B-BIOINTERFACES, 165 . pp. 355-362.

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Abstract

Neonatal cardiomyocytes cultured on flat surfaces are commonly used as a model to study cardiac failure of diverse origin. A major drawback of such a system is that the cardiomyocytes do not exhibit alignment, organization and calcium transients, similar to the native heart. Therefore, there is a need to develop in vitro platforms that recapitulate the cellular microenvironment of the murine heart as organotypic models to study cardiovascular diseases. In this study, we report an engineered platform that mimics cardiac cell organization and function of the heart. For this purpose, microscale ridges were fabricated on silicon using ultraviolet lithography and reactive ion etching techniques. Physical characterization of the microstructures was done using scanning electron microscopy and atomic force microscopy. Cardiomyocytes grown on these micro-ridges showed global parallel alignment and elliptical nuclear morphology as observed in the heart. Interestingly, calcium currents traversed the engineered cardiomyocytes in a coordinated and directional manner. Moreover, the cardiomyocytes on the engineered substrates were found to be responsive to hypertrophic stimuli, as observed by the expression of a fetal gene, atrial natriuretic peptide and increase in calcium transients upon agonist treatment. Taken together, our work demonstrates that micro-ridges can be used to obtain cardiomyocyte response in vitro, which closely resembles mammalian heart. (C) 2018 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	COLLOIDS AND SURFACES B-BIOINTERFACES
Additional Information:	Copy right for this article belong toELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Department/Centre:	Division of Biological Sciences > Microbiology & Cell Biology Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	05 Jun 2018 15:44
Last Modified:	23 Oct 2018 14:50
URI:	http://eprints.iisc.ac.in/id/eprint/59961

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