Page 65 - 南京医科大学学报自然科学版
P. 65

第42卷第8期                           南京医科大学学报(自然科学版)
                  2022年8月                   Journal of Nanjing Medical University(Natural Sciences)     ·1107 ·


               ·基础研究·

                Prkdc和Il2rg双敲除免疫缺陷小鼠的构建和初步应用



                尹   媛 ,曾文滔 ,周建丽 ,梅 云 ,王             颖 ,李建民 ,赖娅娜         1
                                                               1,2
                                                       1
                                               1
                      1
                                       1
                              1
                南京医科大学医药实验动物中心,江苏省医药动物实验基地,江苏省动物实验中心,南京医科大学医学细胞生物学系,江
                1                                                                  2
                苏 南京     211166
               [摘   要] 目的:构建NOD背景免疫缺陷小鼠,作为新的人源肿瘤异种移植(patient⁃derived xenograft,PDX)模型。方法:利用
                CRISPR/Cas9技术获得NOD背景Prkdc和Il2rg双基因敲除小鼠,通过正常繁育得到能够稳定遗传的纯合子后代(命名为NYG
                小鼠),流式细胞术检测小鼠外周血免疫细胞比例,移植接种新鲜肿瘤组织,观察记录肿瘤生长状况及HE染色观察传代PDX
                肿瘤形态学特点。结果:NYG小鼠外周血小鼠无成熟的T细胞、B细胞和NK细胞表达,对移植的患者肿瘤组织几乎没有排斥
                反应,组织病理学表型及免疫系统未见明显异常。结论:成功构建NYG小鼠免疫缺陷小鼠,为肿瘤学基础理论及应用研究提
                供了新的PDX动物模型。
               [关键词] CRISPR/Cas9;PDX模型;肿瘤

               [中图分类号] Q784                    [文献标志码] A                       [文章编号] 1007⁃4368(2022)08⁃1107⁃05
                doi:10.7655/NYDXBNS20220809



                Establishment and preliminary application of the immune ⁃ deficient mice models with
                Prkdc/Il2rg knockout

                                                                       1
                                                  1
                                                           1
                                      1
                                                                                  1,2
                        1
                YIN Yuan ,ZENG Wentao ,ZHOU Jianli ,MEI Yun ,WANG Ying ,LI Jianmin ,LAI Yana 1
                1 Animal Core Facility of Nanjing Medical University,Jiangsu Animal Experimental Center of Medical &
                Pharmaceutical Research,Jiangsu Laboratory Animal center;Department of Cell Biology,Nanjing Medical
                                                                       2
                University,Nanjing 211166,China
               [Abstract] Objective:This srudy aims to establish a patient⁃derived xenograft(PDX)model of NOD background immunodeficient
                                                                              scid
                mice for human cancer preclinical and biological research. Methods:NOD ⁃ Prkdc Il2rg null  mice were obtained by CRISPR/cas9
                technology,and homozygous offspring with stable inheritance were obtained through normal breeding. The proportion of immune cells
                in peripheral blood of mice was monitored by flow cytometry. Fresh tumor tissues were transplanted and inoculated. The tumor growth
                status and the morphological characteristics of passaged PDX tumors were observed and recorded. Results:There was no expression of
                mature T,B and NK cells in peripheral blood of NYG mice. There was almost no rejection to human cells and tissues,and there was no
                obvious abnormality in histopathological phenotype and immune system. Conclusion:NYG mice and immunodeficient mice were
                successfully constructed,which provided a new PDX animal model for the basic theory and application of oncology.
               [Key words] CRISPR/Cas9;patient derived xenografts model;tumor
                                                                            [J Nanjing Med Univ,2022,42(00):1107⁃1111]





                    肿瘤动物模型在模拟人类肿瘤发生、发展、转                          的肿瘤特征,如遗传信息、生长侵袭特性的改变及
                                                                                  [1]
                移等生物学特性以及肿瘤药物研发、靶点筛选、个                            肿瘤异质性的丢失 。因此,美国国家癌症研究所最
                性化治疗领域扮演着至关重要的角色。过去几十                             终决定用患者来源的异种移植物(PDX)替代NCI⁃60
                                                                              [2]
                年,以NCI⁃60为代表的细胞系移植动物模型广泛用                         用于药物筛选 。
                于癌症生物学的研究。但既往的研究表明,人类癌                                PDX 是通过将患者肿瘤样本直接移植到免疫
                症细胞系在移植时会由于不明原因失去它们最初                             功能低下或免疫受损的小鼠构建动物模型。PDX
   60   61   62   63   64   65   66   67   68   69   70