Adipose-Derived Mesenchymal Stem Cells Differentiation Toward Cardiomyocyte-Like Cells on the PCL/PANI Nanofibrous Scaffold: An Experimental Study.

Background: Owing to the fact that the heart tissue is not able to repair itself. Biomaterial-based scaffolds are important cues in tissue engineering (TE) applications. Recent advances in TE have led to the development of suitable scaffold architecture for various tissue defects.

Objective: Given the importance of cellular therapy, it was the aim of the present study to differentiate cardio myocyte cells from human adipose-derived mesenchymal stem cells (Ad-MSCs) using suitable induction reagents (namely, 5-azacytidine and transforming growth factor beta (TGF-β)) on poly-caprolactone (PCL)/Poly aniline (PANI) Nano fibrous scaffolds prepared by electrospinning.

Materials and methods: For this purpose, the adipose-derived mesenchymal stem cells (Ad-MSCs) were initially isolated and characterized before cultivation on the PCL/PANI Nano fibrous scaffold to be treated for 21 days with 5-azacytidine either singly or in combination with TGF-β in medium. The scaffold's morphological and cell attachment properties were investigated using electron microscopy (SEM). Finally, the cardio myocyte differentiation of Ad-MSCs on the scaffold was studied using both quantitative Real-time PCR (qPCR) and flow-cytometry while the expression rates of the cardio myocytes' specific genes (Gata4, NKX2.5, MYH-7, and Troponin I) were also determined.

Results: The results of Ad-MSCs culture, MTT assay, and SEM indicated that the cells had well proliferated on the PCL/PANI scaffolds, showing the biocompatibility of the nanofibers for cellular growth and adhesion. After 21 days of induced cardio myocyte differentiation by both agents, Real-time PCR revealed increases in the expressions of Gata4, Troponin I, MYH-7, and NKX2.5 genes in the cells cultured on the PCL/PANI scaffolds while the flow-cytometry test approved the expression of troponin I.

Conclusion: The data obtained showed that the PCL/PANI Nano fibrous scaffolds were able to promote and support mesenchymal stem cell transformation to cardio myocyte cells. Generally speaking, the results of the study might be exploited in future in vitro and in vivo experimental model studies of cardio myocyte differentiation using co-polymer scaffolds.