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The aim of the present study was to perform a rapid evaluation of the efficiency of commonly used platinum-based chemotherapy regimens for patients with ovarian cancer with extensive metastases using an in vitro method combined with culturing primary cells and real-time monitoring, and to further explore the enhanced effect of metformin on susceptibility of ovarian cancer cells to platinum-based chemotherapy. The primary omental metastatic (OM) cells were isolated from the omentum metastasis of a surgical patient with stage IIIc ovarian carcinoma. Drug sensitivity was evaluated using the xCELLigence system, and screening of the most effective platinum chemotherapy was performed through analysis of cell susceptibility to cisplatin, carboplatin, nedaplatin and paclitaxel or docetaxel alone or in combination. At the same time, this system was used to determine whether metformin was able to increase the sensitivity of cancer cells to platinum chemotherapy. The results revealed that nedaplatin exhibited the most marked cytotoxic effect on the OM cells, followed by those of carboplatin and cisplatin. The addition of docetaxel enhanced the cytotoxic effect, and the combination of platinum and paclitaxel also enhanced the effect. Metformin rapidly increased the sensitivity of cells to platinum-based chemotherapy, and this effect was dose-dependent. The sensitivity of OM cells to different platinum-based regimens was varied. The effect of metformin on chemotherapeutic sensitization of cancer cells is clear in vitro , and the real-time cell analyzer assay has the potential to assist in determining individualized drug regimens for patients with metastatic ovarian cancer.

oncology letters

Real‑time assessment of platinum sensitivity of primary culture from a patient with ovarian cancer with extensive metastasis and the platinum sensitivity enhancing effect by metformin