Modulation of Cell-Cycle gene expression by Chitosan coated Silver nanopartices on Human Epidermoid Carcinoma cells.MODULATION OF CELL-CYCLE GENE EXPRESSION BY CHITOSAN COATED SILVER NANOPARTICES ON HUMAN EPIDERMOID CARCINOMA CELLS

Objective: To detect the variability in the expression of cell cycle genes such as Cyclin D1,CDK4 p21 , p27 and p57 associated with cytotoxicity of Human epidermoid carcinoma cells using qPCR. Methods: The synthesis silver nanoparticles and chitosan coated silver nanoparticles was done by chemical reduction method using polyvinyalpyrolidone (PVP) as surfactant and glucose as reducing agent. The cell proliferation assay was performed using MTS assay. Gene expression analysis was performed using Eppendorf Realplex 2 PCR systems. Results: The lowest concentration of 1mg of Chitosan-AgNPs with 25μg/ml concentration showed 35% reduction in the A431 cell line growth. Significantly increased expression of p21, p27, p57, CCND1 and CD4 gene was observed among 1mg of Chitosan-AgNPs with 25μg/ml concentrations indicating potential apoptotic activity at the lowest concentration of Chitosan-AgNPs on A431 cells. Conclusions: The effect of AgNPs inducing apoptosis/growth arrest at low concentrations (1mg-25μg/ml) has been more effective while coating the nanoparticle with chitosan. The potential apoptotic properties of Chitosan-AgNPs are evident by the significant up regulation of the cell cycle genes when treated with low concentration of Chitosan-AgNPs.