Abstract
The synthesised zeolite X from coal fly ash showed significant cytotoxic activity in contradiction of HeLa cells (cervical cancer) in a concentration-dependent way at concentrations ranges from 200µg to 0.781µg/ml as shown by MTT assay and failed to cause cytotoxic effect in normal cells (Gh239). Cell cycle analysis exposed that zeolite X (10 and 15µg/ml) endorses cell growth inhibition by inducing G2/M phase arrest in HeLa cells as observed using flow cytometry. The confocal microscopic results depicted increased early apoptotic related changes in HeLa cell lines induced by zeolite X at a dosage of 10, 15 and 20µg/ml. Zeolite X at a dosage of 10, 15 and 20µg/ml in HeLa cells showed fragmentation of DNA by ladder pattern thereby indicates that cell death is related with apoptosis. By the increase of Bax/Bcl-2 ratio, zeolite X leads to the caspase-3 and caspase-9 activation and allow the cells to enter apoptosis. These collective results evidently showed that the influence of mitochondria-mediated signalling pathway in zeolite X induced apoptosis and intensely delivered investigational suggestion for the use of zeolite X as a significant curative agent in the preclusion and therapy of human cervical carcinoma.
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