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2015 ; 26
(10
): 1026-33
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Para-toluenesulfonamide induces tongue squamous cell carcinoma cell death through
disturbing lysosomal stability
#MMPMID26302210
Liu Z
; Liang C
; Zhang Z
; Pan J
; Xia H
; Zhong N
; Li L
Anticancer Drugs
2015[Nov]; 26
(10
): 1026-33
PMID26302210
show ga
Para-toluenesulfonamide (PTS) has been implicated with anticancer effects against
a variety of tumors. In the present study, we investigated the inhibitory effects
of PTS on tongue squamous cell carcinoma (Tca-8113) and explored the lysosomal
and mitochondrial changes after PTS treatment in vitro. High-performance liquid
chromatography showed that PTS selectively accumulated in Tca-8113 cells with a
relatively low concentration in normal fibroblasts. Next, the effects of PTS on
cell viability, invasion, and cell death were determined. PTS significantly
inhibited Tca-8113 cells' viability and invasive ability with increased cancer
cell death. Flow cytometric analysis and the lactate dehydrogenase release assay
showed that PTS induced cancer cell death by activating apoptosis and necrosis
simultaneously. Morphological changes, such as cellular shrinkage, nuclear
condensation as well as formation of apoptotic body and secondary lysosomes, were
observed, indicating that PTS might induce cell death through disturbing
lysosomal stability. Lysosomal integrity assay and western blot showed that PTS
increased lysosomal membrane permeabilization associated with activation of
lysosomal cathepsin B. Finally, PTS was shown to inhibit ATP biosynthesis and
induce the release of mitochondrial cytochrome c. Therefore, our findings provide
a novel insight into the use of PTS in cancer therapy.