Abstract
Dedifferentiated liposarcoma (DDLPS) is one of the four subtypes of liposarcomas; it is characterized by the amplification of the 12q13-15 region, which includes MDM2 and CDK4 genes. DDLPS has an extremely high local recurrence rate and is refractory to chemotherapy and radiation, which leads to poor prognosis. Therefore, a novel therapeutic strategy should be urgently established for improving the prognosis of DDLPS. Although patient-derived cell lines are important tools for basic research, there are no DDLPS cell lines available from public cell banks. Here, we report the establishment of a novel DDLPS cell line. Using the surgically resected tumor tissue from a patient with DDLPS, we established a cell line and named it NCC-DDLPS1-C1. The NCC-DDLPS1-C1 cells contained 12q13-15, 1p32, and 1q23 amplicons and highly expressed MDM2 and CDK4 proteins. NCC-DDLPS-C1 cells exhibited constant growth, spheroid formation, aggressive invasion, and tumorigenesis in mice. By screening a drug library, we identified that the proteasome inhibitor, bortezomib, had inhibitory effects on the proliferation of NCC-DDLPS1-C1 cells. We concluded that the NCC-DDLPS1-C1 cell line may serve as a useful tool for basic and pre-clinical studies of DDLPS.
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Acknowledgements
We thank Drs. F Nakatani, E Kobayashi, M Nakagawa, T Komatsubara, M Saito, C Sato (Department of Musculoskeletal Oncology), and Drs. T Shibayama, and H Tanaka (Department of Diagnostic Pathology), National Cancer Center Hospital, for sampling tumor tissue specimens from surgically resected materials. We thank Dr. T Kiyono (Division of Carcinogenesis and Prevention) for kindness in providing the HFF cell line. We also appreciate the technical assistance provided by Mr. K Tanoue, T Ono, and Ms. Y Kuwata (Division of Rare Cancer Research). We appreciate the technical support provided by Ms Y Shiotani, Mr. N Uchiya, and Dr. T Imai (Central Animal Division, National Cancer Center Research Institute). We would also like to thank Editage (https://www.editage.jp) for their help with English language editing and their constructive comments on the manuscript. This research was technically assisted by the Fundamental Innovative Oncology Core in the National Cancer Center.
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This research was supported by the Japan Agency for Medical Research and Development (Grant number 20ck0106537h0001).
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The ethical committee of the National Cancer Center approved the use of clinical materials for this study with the approval number 2004-050. The study using animal models was approved by the ethics committee of the National Cancer Center Research Institute (T13-016).
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Tsuchiya, R., Yoshimatsu, Y., Noguchi, R. et al. Establishment and characterization of NCC-DDLPS1-C1: a novel patient-derived cell line of dedifferentiated liposarcoma. Human Cell 34, 260–270 (2021). https://doi.org/10.1007/s13577-020-00436-5
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DOI: https://doi.org/10.1007/s13577-020-00436-5