Apoptotic Effect of Co-treatment with Curcumin and Cisplatin on SCC25 Human Tongue Squamous Cell Carcinoma Cell Line.
- Author:
Hyeon Jin SOHN
1
;
In Ryoung KIM
;
Yong Ho KIM
;
Gyoo Cheon KIM
;
Hyun Ho KWAK
;
Bong Soo PARK
Author Information
1. Department of Oral Anatomy, School of Dentistry, Pusan National University, Korea. parkbs@pusan.ac.kr
- Publication Type:Original Article
- Keywords:
curcumin;
cisplatin;
co-treatment;
apoptosis;
oral squamous cell carcinoma
- MeSH:
Antineoplastic Agents;
Apoptosis;
Blotting, Western;
Carcinoma, Squamous Cell*;
Caspase 3;
Caspase 7;
Cell Line*;
Cisplatin*;
Curcumin*;
Cytochromes c;
Cytosol;
DNA;
DNA Fragmentation;
Electrophoresis;
Flavoring Agents;
Fluorescent Antibody Technique;
Humans;
Tongue*
- From:International Journal of Oral Biology
2014;39(3):159-167
- CountryRepublic of Korea
- Language:English
-
Abstract:
Curcumin is a widely used flavoring agent in food, and it has been reported to inhibit cell growth, to induce apoptosis, and to have antitumor activity in many cancers. Cisplatin is one of the most potent known anticancer agents and shows significant clinical activity against a variety of solid tumors. This study was undertaken to investigate the synergistic apoptotic effects of co-treatment with curcumin and cisplatin on human tongue SCC25 cells. To investigate whether the co-treatment efficiently reduced the viability of the SCC25 cells compared with the two treatments separately, an MTT assay was conducted. The induction and the augmentation of apoptosis were confirmed by DNA electrophoresis, Hoechst staining, and an analysis of DNA hypoploidy. Western blot, MMP and immunofluorescence tests were also performed to evaluate the expression levels and the translocation of apoptosis-related proteins following the co-treatment. In this study, following the co-treatment with curcumin and cisplatin, the SCC25 cells showed several forms of apoptotic manifestation, such as nuclear condensation, DNA fragmentation, reduction of MMP, increased levels of Bax, decreased levels of Bcl-2, and decreased DNA content. In addition, they showed a release of cytochrome c into the cytosol, translocation of AIF and DFF40 (CAD) to the nuclei, and activation of caspase-7, caspase-3, PARP, and DFF45 (ICAD). In contrast, separate treatments of 5 microM of curcumin or 4 microg/ml of cisplatin, for 24 hours, did not induce apoptosis. Therefore, our data suggest that combination therapy with curcumin and cisplatin could be considered as a novel therapeutic strategy for human oral squamous cell carcinoma.
