树鼩角膜基质永生化细胞系的构建及其在病毒感染性方面的研究
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1.中国医学科学院/北京协和医学院医学生物学研究所;2.金华市中心医院;3.昆明医科大学

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国家重点研发计划项目(2021YFF0702404),云南省基础研究计划面上项目(202101AT070291),云南省眼科疾病防治研究重点实验室(2017DG008), 昆明市科技创新团队(2019-1-R-24483)


Construction of immortalized corneal stromal cell line of tree shrew and study on viral infectivity
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1.Institute of Medical Biology,Chinese Academy of Medical Sciences/Peking Union Medical College;2.Kunming Medical University

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Funded by the National Key R&D Program of China( 2021YFF0702404), Yunnan Fundamental Research Projects( 202101AT070291), Yunnan Key Laboratory of Eye Disease Prevention and Treatment(2017DG008), Kunming Science and Technology Innovation Team( 2019-1-R-24483)

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    摘要:

    目的 建立树鼩角膜基质细胞(corneal stromal cells, CSCs)永生化细胞系,并探讨其在病毒感染中的应用。方法 利用组织块贴壁培养法分离培养树鼩原代CSCs,将携带SV40T基因的慢病毒转染细胞后,再挑取单克隆进行传代培养,传至50代以上进行形态学观察、波形蛋白(vimentin)和永生化基因SV40T免疫荧光鉴定、核型鉴定、细胞增殖曲线测定。采用单纯疱疹病毒Ⅰ型(Herpes simplex virus-1,HSV-1)、ZIKV(GZ01株)、登革病毒Ⅱ型以及H1N1 A/Puerto Rico/8/1934(A/PR/8)在该细胞上进行病毒感染实验。结果 传至50代以上的树鼩永生化的CSCs呈梭形,细胞形态结构较好。波形蛋白(vimentin)和SV40T基因免疫荧光表达阳性。增殖曲线结果显示:细胞生长旺盛,第4-5天时处于对数生长期。原代细胞核型的染色体数稳定为62条,而永生化细胞第21代、第56代突变为64条且保持稳定。病毒感染实验显示:树鼩永生化的CSCs对HSV-1、ZIKV(GZ01株)、登革病毒Ⅱ型以及H1N1 A/Puerto Rico/8/1934(A/PR/8)病毒敏感,产生较高感染滴度,分别为1.32×105TCID50/mL、5.62×106TCID50/mL、2.69×107TCID50/mL、7.76×104TCID50/mL。结论 成功建立了树鼩CSCs永生化细胞系,提示该细胞系可用于单纯疱疹病毒、寨卡病毒、登革病毒和甲型流感病毒感染眼角膜疾病的作用机制及抗病毒药物的研究。

    Abstract:

    Objective To establish an immortalized tree shrew corneal stromal cell line and to study the virus infection. Methods The primary corneal stromal cells (CSCs) of tree shrew were isolated and cultured by tissue block adhesion method. CSCs were transfected a lentivirus carrying SV40T gene, monoclonal clones were selected for passage culture. The characteristics of CSCswere tested through morphological observation、immunofluorescence、Karyotypeand cell proliferation curve. Using Herpes simplex virus-1(HSV-1)、ZIKV(GZ01 strain)、Dengue virus typeⅡand H1N1 A/Puerto Rico/8/1934(A/PR/8)to infect the CSCs. Virus titers were detected by CCDI50. Results the immortalized tree shrews CSCs transmitted to more than 50 passages were spindle-shaped and had good cell morphology and structure. High level of Vimentin and SV40T were detected by immunofluorescence. The cell growth curve showed the cells were in the logarithmic phase on days 4-5, and grew vigorously. The number of chromosomes of the primary cell karyotype was stable at62, while immortalized CSCs was 64 at P21 and P56. The results of virus titer showed that the immortalized tree shrew CSCs were sensitive to HSV-1、ZIKV(GZ01 strain)、Dengue virus typeⅡand H1N1 A/Puerto Rico/8/1934(A/PR/8),and the virus titers were 1.32×105TCID50/mL、5.62×106TCID50/mL、2.69×107TCID50/mL、7.76×104TCID50/mL respectively. Conclusions The immortalized tree shrew CSCs were successfully established, suggesting that the cell line can be used in study of the mechanism of herpes simplex virus, Zika virus, Dengue virus and influenza A virus infection of corneal diseases and antiviral drugs.

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  • 收稿日期:2023-10-27
  • 最后修改日期:2024-02-13
  • 录用日期:2024-05-13
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