Abstract
Chondrosarcoma is a soft tissue sarcoma with a poor prognosis that is unresponsive to conventional chemotherapy. The regulatory mechanisms for the rapid proliferation of chondrosarcoma cells and the particular aggressiveness of this sarcoma remain poorly understood. In this study, we investigate the effect of epigallocatechin-3-gallate (EGCG) on growth and apoptosis of chondrosarcoma cells. The chondrosarcoma cell lines, SW1353 and CRL-7891, were cultured with and without EGCG. The MTT assay was used to test the cytotoxicity of EGCG. Flow cytometry and DAPI staining were used to observe cell apoptosis caused by EGCG. To explore the effect of EGCG on the Indian Hedgehog signaling pathway and apoptosis-related proteins, RT-PCR and Western blotting were used to detect the expression of PTCH and Gli-1 in the Indian Hedgehog signaling pathway. Meanwhile, expression of Bcl-2, Bax, and caspase-3 were also evaluated by Western blot analysis. EGCG effectively inhibited cellular proliferation and induced apoptosis of SW1353 and CRL-7891. EGCG inhibited the human Indian Hedgehog pathway, down-regulated PTCH and Gli-1 levels, and induced apoptosis as confirmed by DAPI staining followed by flow cytometry. Protein expression levels of caspas...Continue Reading
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