title: Short interfering RNA directed against the GOLPH3 gene enhances the effect of chemotherapy against oral squamous cell carcinoma by regulating Caspase3, Bcl2 and cytochrome-c expression.
abstract: Growing evidence reported that Golgi phosphoprotein 3 (GOLPH3) was involved in the progression of several human cancers. To determine whether knockout of GOLPH3 enhances the effect of Chemotherapy against cell growth of oral squamous cell carcinoma in vitro. OSCC cells were transfected with Golph3 plasmid, Golph3-RNAi and the relative control plasmids. Transfected Tca-8113 cells treated with cis-Dichlorodiamineplatinum (DDP; 0, 0.05, 0.25, 1.25, 6.25 and 31.25 ug/ml) or Paclitaxe (0, 2, 10, 50, 250 and 1250 nM) or Adriamycin (0, 0.25, 0.5, 1, 2 and 4 ug/ml) for 24 h, respectively, was determined using MTT assay. Apoptosis-related protein expression Cytochrome-C, Caspase3 and Bcl-2 was analyzed by RT-PCR and western blots. Result of MTT showed that Golph3-RNAi transfected Tca-8113 cells enhanced the effect of chemotherapy, and the effect was strengthened with the increasing concentration of drugs, and the Golph3 plasmid transfected Tca-8113 cells showed the opposite effect. RT-PCR and western blots assays revealed that expression of cytochrome-C and caspase3 were up-regulated, while Bcl-2 expression was down-regulated in Golph3-RNAi transfected Tca-8113 cells. Taken together, this study demonstrated that GOLPH3 had potent pro-tumor growth and decreased the effect of Chemotherapy, and its mechanism is primarily via cell anti-apoptosis, down-regulating the expression of cytochrome-C and caspase3, up-regulating Bcl-2 expression.
authors.affiliation: Department of Stomatology, Zaozhuang Women and Children Health Care Hospital Zaozhuang, Shandong Province, 277100, People's Republic of China.
authors.forename: Guo-Hui
authors.initials: GH
authors.lastname: Cui
authors.affiliation: Department of Stomatology, Dongming People's Hospital Dongming, Shandong Province, 274500, People's Republic of China.
authors.forename: Wen-Xin
authors.initials: WX
authors.lastname: Li
authors.affiliation: Department of Oral Medicine, Provincial Hospital Affiliated to Shandong University Jinan, Shandong Province, 250021, People's Republic of China.
authors.forename: Zhi-Yong
authors.initials: ZY
authors.lastname: Lin
authors.affiliation: Department of Oral Implantology, Provincial Hospital Affiliated to Shandong University Jinan, Shandong Province, 250021, People's Republic of China.
authors.forename: Wei-Qun
authors.initials: WQ
authors.lastname: Zhang
authors.affiliation: Department of Oral Implantology, Provincial Hospital Affiliated to Shandong University Jinan, Shandong Province, 250021, People's Republic of China.
authors.forename: Zhao-Hui
authors.initials: ZH
authors.lastname: Hu
authors.affiliation: Department of Oral Implantology, Provincial Hospital Affiliated to Shandong University Jinan, Shandong Province, 250021, People's Republic of China.
authors.forename: Li
authors.initials: L
authors.lastname: Wang
keywords: GOLPH3; cell apoptosis; cell growth; oral squamous cell carcinoma