Abstract
The aim of the present study was to determine the cytotoxic, anticancerous and antiproliferative activity of CGA on oral squamous cell carcinoma (OSCC) cell line (KB) and to evaluate expression level of p21 and p53 in these CGA treated OSCC cell line. Different concentrations of CGA varying from 500 to 2500µM were tested on OSCC cell line. Trypan blue and MTT assay were performed to establish IC50. DNA fragmentation and expression level of p21 and p53 were evaluated with the help of RT-PCR. CGA exerted antiproliferative and cytotoxic effect on OSCC (KB) cell line. Statistically significant results were found regarding effect of different CGA concentrations on KB cell line with IC50 at 1800µM. No DNA fragmentation was observed. p21 and p53 expression were down regulated after CGA treatment. CGA revealed neither apoptosis nor damage to the nucleus after DNA fragmentation. Antiproliferative role of CGA was hinted by down regulation of p53 and p21 probably through cell cycle arrest at G1-S phase. It was reaffirmed that CGA a natural chemo preventive agent could enhance the treatment modalities with minimal side effects.
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