Establishment and characterization of DPC-X4: a novel mixed-type ampullary cancer cell line

文献类型： 外文期刊

第一作者： Chai, Changpeng

作者： Chai, Changpeng;Li, Lu;Miao, Long;Wang, Zhengfeng;Luo, Wei;Hu, Jinjing;Xu, Hao;Chai, Changpeng;Tang, Huan;Yu, Cheng;Su, Yuanhui;Miao, Long;Ye, Zhenzhen;Wang, Zhengfeng;Zhang, Hui;Zhou, Wence;Yi, Jianfeng;Xu, Hao;Yi, Jianfeng;Yu, Cheng;Ye, Zhenzhen;Zhang, Hui;Zhou, Wence;Miao, Xin

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关键词： Mixed-type ampullary cancer; DPC-X4 cell line; Drug sensitivity; Xenograft tumor model; Pathogenetic research

期刊名称：HUMAN CELL （ 影响因子：4.3； 五年影响因子：4.2 ）

ISSN： 0914-7470

年卷期： 2024 年 37 卷 2 期

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收录情况： SCI

摘要： Mixed-type ampullary cancer is a distinct subtype of ampullary cancer that manifests a merging of the biological characteristics of both intestinal and pancreaticobiliary subtypes. The absence of established cell lines specific to this subtype has resulted in a concomitant scarcity of research on its tumorigenic mechanisms and the development of novel therapeutic modalities. The present study achieved the successful establishment of a novel mixed-type ampullary cancer cell line, designated DPC-X4 through primary culture techniques. Subsequent analyses pertaining to phenotypic characteristics, molecular profiling, biomarker identification, and histological features validated the DPC-X4 cell line as a potent model for delineating the pathogenesis of mixed-type ampullary cancer and facilitating the development of new pharmacological agents. This newly established cell line was subjected to continuous cultivation for 1 year, with stable passaging for over 50 generations. Notably, the DPC-X4 cell line manifested typical morphological features associated with epithelial tumors. Furthermore, the population doubling time for the DPC-X4 cell line was determined at 70 h. Short tandem repeat (STR) analysis confirmed that the DPC-X4 cell line exhibited a high genetic concordance with the primary tumor from the patient. Karyotypic profiling indicated an abnormal sub-triploid karyotype, with representative karyotypes of 57, XXY inv (9), 14p + , 15p + , der (17), + mar. The DPC-X4 cell line demonstrated a high capacity for efficient organoid formation under suspension culture conditions. In addition, the subcutaneous inoculation of DPC-X4 cells into NXG mice led to the formation of xenografted tumors. The results of drug sensitivity testing indicated that DPC-X4 cells were sensitive to paclitaxel and resistant to oxaliplatin, 5-fluorouracil, and gemcitabine. Immunohistochemistry revealed positive expression of CK7, CK19, and CK20 in DPC-X4 cells, while CDX2 demonstrated negative expression. In addition, positive expression of E-cadherin and vimentin was identified in DPC-X4 cells, with a proliferation index indicated by Ki-67 at 70%. The findings of our study establish DPC-X4 as a novel mixed-type ampullary cancer cell line, which can serve as a potential experimental model for exploring the pathogenesis of ampullary cancer and the development of therapeutic drugs.

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