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Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: OBJECTIVE, METHODS, RESULTS. Meshes: Adenoviridae, Animals, Antineoplastic Agents, Apoptosis, Blotting, Western, Carcinoma, Squamous Cell, Cell Cycle, Cell Line, Tumor, Cisplatin, Combined Modality Therapy, Female, Genetic Therapy, HeLa Cells, Humans, Mice, Mice, Nude, RNA, Messenger, Random Allocation, Reverse Transcriptase Polymerase Chain Reaction, Tissue Inhibitor of Metalloproteinase-3, Transfection, Tumor Suppressor Protein p53, Uterine Cervical Neoplasms, Xenograft Model Antitumor Assays.
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Does [ Adenovirus-delivered tissue inhibitor of metalloproteinases-3 transfection increase the sensitivity of cervical cancer cells to cisplatin ]? Context: To investigate the effects of adenovirus-delivered tissue inhibitor of metalloproteinases-3 ( Ad-TIMP-3) on sensitivity of cervical cancer cells to cisplatin and evaluate the potential application of this combined scheme in cervical cancer treatment. Cells of cervical cancer CaSKi cell line were infected with Ad-TIMP-3 in vitro. Apoptotic effect, cell cycle changes and p53 protein expression were detected. After combined treatment of those cells with cisplatin, colony formation test was performed and cytotoxicity was detected by MTT. The growth curve and tumor growth inhibition in vivo were evaluated. The expressions of TIMP-3 mRNA and protein were significantly upregulated after transfection. As a result, massive apoptosis was induced and the cells were arrested at G2/M phase. Exogenous overexpression of TIMP-3 increased p53 protein level markedly in spite of the backgrounds of p53 gene in cells. Combined with cisplatin treatment, the cloning efficiency was decreased. A synergism was observed by isobolic method ( D < 1 ) in vitro and tumor growth was significantly inhibited in vivo.
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Ad-TIMP-3 is a powerful proapoptotic agent. It increases sensitivity of the cells to cisplatin and the Ad-TIMP-3 gene therapy in combination with cisplatin could be a promising alternative in cervical cancer treatment. Final Decision: yes