Inhibiting polo-like kinase 1 enhances radiosensitization via modulating DNA repair proteins in non-small-cell lung cancer
| Autor: | Jianjun Ge, Weibin Luo, Huiliang Chi, Peigui Gu, Da Yao, Youhui Qian, Youyu Wang |
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| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
DNA Replication Lung Neoplasms DNA Repair DNA repair Apoptosis Cell Cycle Proteins Polo-like kinase Biology Protein Serine-Threonine Kinases Biochemistry Chromosome segregation 03 medical and health sciences 0302 clinical medicine Carcinoma Non-Small-Cell Lung Cell Line Tumor Chromosome Segregation Proto-Oncogene Proteins medicine Humans DNA Breaks Double-Stranded Lung cancer Molecular Biology Pteridines Cell Biology medicine.disease Spindle checkpoint 030104 developmental biology 030220 oncology & carcinogenesis Cancer cell Cancer research Non small cell |
| Zdroj: | Biochemistry and cell biology = Biochimie et biologie cellulaire. 96(3) |
| ISSN: | 1208-6002 |
| Popis: | To assure faithful chromosome segregation, cells make use of the spindle assembly checkpoint, which can be activated in aneuploid cancer cells. In this study, the efficacies of inhibiting polo-like kinase 1 (PLK1) on the radiosensitization of non-small-cell lung cancer (NSCLC) cells were studied. Clonogenic survival assay was performed to identify the effects of the PLK1 inhibitor on radiosensitivity within NSCLC cells. Mitotic catastrophe assessment was used to measure the cell death and histone H2AX protein (γH2AX) foci were utilized to assess the DNA double-strand breaks (DSB). The transcriptome was analyzed via unbiased profiling of microarray expression. The results showed that the postradiation mitotic catastrophe induction and the DSB repair were induced by PLK1 inhibitor BI-6727, leading to an increase in the radiosensitivity of NSCLC cells. BI-6727 in combination with radiation significantly induced the delayed tumor growth. PLK1-silenced NSCLC cells showed an altered mRNA and protein expression related to DNA damaging, replication, and repairing, including the DNA-dependent protein kinase (DNAPK) and topoisomerase II alpha (TOPO2A). Furthermore, inhibition of PLK1 blocked 2 important DNA repair pathways. To summarize, our study showed PLK1 kinase as an option in the therapy of NSCLC. |
| Databáze: | OpenAIRE |
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