Research Article
Plumbagin Enhances the Anticancer Effects of PF Chemotherapy via Downregulation of the PI3K/AKT/mTOR/p70S6K Pathway in Human Tongue Squamous Cell Carcinoma
Figure 5
PB enhanced the proapoptotic effects of PF in TSCC cells. (a) Results of the flow cytometry assay demonstrated apoptosis in Cal27 and Cal27/CDDP cells following the treatment with PB and/or PF. (b-c) A histogram of the levels of apoptosis in Cal27 and Cal27/CDDP cells. (d) Representative blots of the proapoptotic protein Bax and Bad and antiapoptotic protein Bcl-2 and Bcl-xL in Cal27 and Cal27/CDDP cells after the treatment of PB and/or PF. (e) Ratio of Bax/Bcl-2 in Cal27 and Cal27/CDDP cells. (f-g) Histogram of the expression levels of Bcl-xL and Bad. Independent biological experiments were repeated three times, and statistical significance is denoted by , , and . PB, plumbagin; PF, cisplatin plus 5-fluorouracil; and TSCC, tongue squamous cell carcinoma.
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