胰腺癌类器官模型的构建及其对化疗药物的敏感性试验

Construction of pancreatic cancer organoids and their sensitivity to chemotherapy drugs

目的建立及鉴定患者来源的类器官模型,并利用该模型进行化疗药物敏感性检测。方法利用已确诊胰腺癌的2例女性患者的手术标本获取肿瘤组织消化后获取胰腺癌细胞,利用基质胶接种于培养皿中进行三维培养;制备石蜡切片并进行苏木精-伊红(HE)染色和免疫组化染色,通过与亲本肿瘤组织对比,检测其能否保留体内肿瘤的组织病理学特征;利用不同浓度的7种化疗药物处理胰腺癌类器官,使用Cell Titer-Glo®3D试剂测定细胞活力,分析药敏结果。结果成功建立了2例患者来源的胰腺癌类器官,HE染色和免疫组化染色结果显示胰腺癌类器官与其来源的患者肿瘤在组织病理学特征上一致;2例胰腺癌类器官均对吉西他滨单药、奥沙利铂与SN38+氟尿嘧啶联用更为敏感,患者1较患者2敏感性更高,来自不同患者的类器官对药物反应存在个体差异。结论本研究成功构建的胰腺癌类器官模型能够反映亲本胰腺肿瘤的组织学分型,并能够进行体外化疗药物敏感性试验,有望为患者临床用药提供参考。

Objective To construct and identify a patient-derived organoid model,and to investigate the sensitivity of chemotherapy drugs using this model.Methods Pancreatic cancer cells were obtained from the surgical specimens of two female patients with a confirmed diagnosis of pancreatic cancer after tumor tissue digestion,and then the cells were inoculated into a culture dish using matrigel for three-dimensional culture.Paraffin sections were prepared for HE staining and immunohistochemical staining and were compared with the parent tumor tissue to determine whether the histopathological features of the tumor in vivo were preserved.The pancreatic cancer organoids were treated with seven chemotherapy drugs at different concentrations;Cell Titer-Glo®3D reagent was used to measure cell viability,and the results of drug sensitivity were analyzed.Results Two patient-derived pancreatic cancer organoids were successfully constructed,and HE staining and immunohistochemical staining showed that the pancreatic cancer organoids had consistent histopathological features with the tumors of the corresponding patient.Both pancreatic cancer organoids were more sensitive to gemcitabine monotherapy and the combination of oxaliplatin+SN38+fluorouracil,and patient 1 was more sensitive than patient 2.There were individual differences in the response to drugs between the organoids from different patients.Conclusion The pancreatic cancer organoid model successfully constructed in this study can reflect the histological classification of parent pancreatic tumors and can be used for in vitro chemotherapy drug sensitivity test,which is expected to provide a reference for clinical medication.