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Bortezomib enhances the radiosensitivity of hypoxic cervical cancer cells by inhibiting HIF-1α expression. 2015

Heqing Cui, and Qin Qin, and Meilin Yang, and Hao Zhang, and Zheming Liu, and Yan Yang, and Xiaochen Chen, and Hongcheng Zhu, and Di Wang, and Cuicui Meng, and Hongmei Song, and Jianxin Ma, and Guanhong Huang, and Jing Cai, and Xinchen Sun, and Zhongming Wang
Department of Radiotherapy, The Second People's Hospital of Lianyungang, Lianyungang Hospital Affiliated to Bengbu Medical College China.

OBJECTIVE This study aimed to investigate the radiosensitivity of bortezomib to cervical cancer and the possible underlying mechanism. METHODS HeLa and SiHa cell lines with or without hypoxia treatment were divided into control, radiation alone, bortezomib alone, and radiotherapy plus bortezomib groups. CCK8 assay, clone formation assay, flow cytometry, and immunofluorescence test were used to measure cell proliferation, colony formation, apoptosis, and DNA double-strand break (DSB). Western blot analysis was performed to detect the expression of HIF-1α, PARP-1, and caspase-3, -8, and -9. RESULTS Statistical analysis of data revealed that bortezomib at nanomolar level exerted a radiosensitization effect on both cervical cancer cell lines in normoxia or hypoxia. Western blot analysis showed that the drug could inhibit hypoxia-related HIF-1α expression to increase apoptosis-related caspase-3, -8, and -9 activation and DNA DSB-related PARP-1 cleavage. CONCLUSIONS Radiotherapy sensitization of bortezomib on cervical cancer cell lines had a drug-dose relation, and sensitization in hypoxia was more remarkable than in normoxia. Bortezomib may be a potential radiotherapy sensitization drug for cervical cancer.

UI MeSH Term Description Entries
D011838 Radiation-Sensitizing Agents Drugs used to potentiate the effectiveness of radiation therapy in destroying unwanted cells. Radiation Sensitizer,Radiosensitizing Agent,Radiosensitizing Agents,Agents, Radiation-Sensitizing,Radiation Sensitizers,Radiation Sensitizing Agents,Radiation-Sensitizing Drugs,Radiation-Sensitizing Effect,Radiation-Sensitizing Effects,Radiosensitizing Drugs,Radiosensitizing Effect,Radiosensitizing Effects,Agent, Radiosensitizing,Agents, Radiation Sensitizing,Agents, Radiosensitizing,Drugs, Radiation-Sensitizing,Drugs, Radiosensitizing,Effect, Radiation-Sensitizing,Effect, Radiosensitizing,Effects, Radiation-Sensitizing,Effects, Radiosensitizing,Radiation Sensitizing Drugs,Radiation Sensitizing Effect,Radiation Sensitizing Effects,Sensitizer, Radiation,Sensitizers, Radiation,Sensitizing Agents, Radiation
D002583 Uterine Cervical Neoplasms Tumors or cancer of the UTERINE CERVIX. Cancer of Cervix,Cancer of the Cervix,Cancer of the Uterine Cervix,Cervical Cancer,Cervical Neoplasms,Cervix Cancer,Cervix Neoplasms,Neoplasms, Cervical,Neoplasms, Cervix,Uterine Cervical Cancer,Cancer, Cervical,Cancer, Cervix,Cancer, Uterine Cervical,Cervical Cancer, Uterine,Cervical Cancers,Cervical Neoplasm,Cervical Neoplasm, Uterine,Cervix Neoplasm,Neoplasm, Cervix,Neoplasm, Uterine Cervical,Uterine Cervical Cancers,Uterine Cervical Neoplasm
D005260 Female Females
D006367 HeLa Cells The first continuously cultured human malignant CELL LINE, derived from the cervical carcinoma of Henrietta Lacks. These cells are used for, among other things, VIRUS CULTIVATION and PRECLINICAL DRUG EVALUATION assays. Cell, HeLa,Cells, HeLa,HeLa Cell
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000069286 Bortezomib A pyrazine and boronic acid derivative that functions as a reversible PROTEASOME INHIBITOR. It is used as an ANTINEOPLASTIC AGENT in the treatment of MULTIPLE MYELOMA and MANTLE CELL LYMPHOMA. LDP-341,PS 341,PS-341,Velcade,341, PS,LDP 341,LDP341,PS341
D000860 Hypoxia Sub-optimal OXYGEN levels in the ambient air of living organisms. Anoxia,Oxygen Deficiency,Anoxemia,Deficiency, Oxygen,Hypoxemia,Deficiencies, Oxygen,Oxygen Deficiencies
D015870 Gene Expression The phenotypic manifestation of a gene or genes by the processes of GENETIC TRANSCRIPTION and GENETIC TRANSLATION. Expression, Gene,Expressions, Gene,Gene Expressions
D017209 Apoptosis A regulated cell death mechanism characterized by distinctive morphologic changes in the nucleus and cytoplasm, including the endonucleolytic cleavage of genomic DNA, at regularly spaced, internucleosomal sites, i.e., DNA FRAGMENTATION. It is genetically programmed and serves as a balance to mitosis in regulating the size of animal tissues and in mediating pathologic processes associated with tumor growth. Apoptosis, Extrinsic Pathway,Apoptosis, Intrinsic Pathway,Caspase-Dependent Apoptosis,Classic Apoptosis,Classical Apoptosis,Programmed Cell Death,Programmed Cell Death, Type I,Apoptoses, Extrinsic Pathway,Apoptoses, Intrinsic Pathway,Apoptosis, Caspase-Dependent,Apoptosis, Classic,Apoptosis, Classical,Caspase Dependent Apoptosis,Cell Death, Programmed,Classic Apoptoses,Extrinsic Pathway Apoptoses,Extrinsic Pathway Apoptosis,Intrinsic Pathway Apoptoses,Intrinsic Pathway Apoptosis
D045744 Cell Line, Tumor A cell line derived from cultured tumor cells. Tumor Cell Line,Cell Lines, Tumor,Line, Tumor Cell,Lines, Tumor Cell,Tumor Cell Lines

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