International journal of cardiology

A simplified protocol for culture of murine neonatal cardiomyocytes on nanoscale keratin coated surfaces.

PMID 28096043


We aim to develop a simple, efficient and cost-effective protocol for culturing the neonatal cardiomyocytes using keratin derived from human hair, which can be used for studying cardiac hypertrophy in vitro. Keratin was extracted from human hair and applied as nanoscale coating onto the culture dishes. Physical parameters such as surface morphology and roughness of the coating were studied by SEM and AFM. Cardiomyocyte specific markers were assessed by immunofluorescence. Signaling pathways activated in hypertrophy were analyzed by western blotting and changes in the expression of fetal genes were analyzed by qPCR. The changes in the calcium fluxes were observed microscopically using Fluo-4. Keratin coated surfaces displayed a uniform coating and comparable roughness across dishes. Our optimized protocol for isolating cardiomyocytes yielded up to ~10 We demonstrate that keratin can act as an efficient yet cost effective alternative substrate for the attachment, growth and differentiation of neonatal murine cardiomyocytes.