Page 13 - 南京医科大学学报自然科学版

第41卷第4期 南京医科大学学报（自然科学版）
2021年4月 Journal of Nanjing Medical University（Natural Sciences） ·483 ·

·基础医学·

利用CRISPR/Cas9建立PIN1基因敲除的成体神经干细胞系

胡廷栋，王 蒙，刘晓蕊，杨海元，戴一凡 ，王 盈 *
*
江苏省异种移植重点实验室，南京医科大学医学遗传学系，江苏 南京 211166

［摘 要］ 目的：利用CRISPR/Cas9基因编辑技术敲除成体神经干细胞（neural stem cell，NSC）PIN1基因，建立PIN1基因敲除
的成体神经干细胞系。方法：取8周龄C57BL/6小鼠脑室下区的脑组织进行体外培养；设计靶向小鼠PIN1基因的单导向RNA
（single guide RNA，sgRNA），以PX330质粒为骨架，构建PIN1的Cas9打靶载体，转染小鼠的成体神经干细胞，通过puro筛选和
测序鉴定获得PIN敲除的单克隆细胞；利用免疫荧光染色和Western blot测定PIN1蛋白表达水平，免疫荧光染色鉴定神经干细
胞的特征性标志物巢蛋白（Nestin）的表达，Beta Ⅲ Tubulin免疫荧光染色鉴定神经干细胞分化为神经元的能力。结果：成功构
建PIN1基因的Cas9/sgRNA 表达载体，转染后获得PIN1敲除的神经干细胞克隆9个。免疫荧光染色及Western blot 显示PIN1
蛋白无表达，免疫荧光染色显示PIN1敲除的神经干细胞Nestin阳性，神经干细胞分化培养时可部分分化为Beta Ⅲ Tubulin阳
性的神经元细胞。结论：CRISPR/Cas9 基因编辑技术可实现对小鼠成体神经干细胞 PIN1 基因的编辑。在 PIN1 基因敲除后
PIN1蛋白无表达，初步表型分析显示，神经干细胞仍表达特征性标志物Nestin，并具有向神经元分化的能力。
［关键词］ 成体神经干细胞；CRISPR/Cas9；PIN1
［中图分类号］ R329.2 ［文献标志码］ A ［文章编号］ 1007⁃4368（2021）04⁃483⁃07
doi：10.7655/NYDXBNS20210402

Establishment of neural stem cells line with PIN1 gene knockout by CRISPR/Cas9

*
HU Tingdong，WANG Meng，LIU Xiaorui，YANG Haiyuan，DAI Yifan ，WANG Ying *
Jiangsu Key Laboratory of Xenotransplantation，Department of Medical Genetics，Nanjing Medical University，
Nanjing 211166，China

［Abstract］ Objective：CRISPR/Cas9 gene editing technology was employed to knockout the PIN1 gene of adult neural stem cells
（NSCs）and finally established a PIN1 gene knockout adult neural stem cell line. Methods：The tissue from the subventricular zone of 8
⁃week⁃old C57BL/6 mice was dissected and cultured in vitro；single guide RNA（sgRNA）targeting PIN1 gene in mice was designed，
and the PX330 plasmid was used as the skeleton to construct PIN1 Cas9 target vector. PIN⁃knockout monoclonal cells were obtained
after transfection and puro screening. The expression level of PIN1 protein was verified by immunofluorescence and Western blot. The
expression of nestin was used to identify the neural stem cell characteristics. The differentiation ability to neuronal lineage was
determined by beta Ⅲ tubulin immunofluorescence. Results：Cas9/sgRNA expression vector of PIN1 gene was successfully
constructed，and nine PIN1 knockout neural stem cells were cloned after transfection. Immunofluorescence and Western blot showed
no expression of PIN1 protein，immunofluorescence showed positive expression of nestin in PIN1 knockout neural stem cells，and
neural stem cells could differentiate into beta Ⅲ tubulin positive neurons in differentiation culture. Conclusion：CRISPR/Cas9 gene
editing technology can realize the editing of PIN1 gene in mouse adult neural stem cells. After knock⁃out of PIN1 gene，PIN1 protein is
not expressed，but neural stem cells still partially express the specific marker nestin and have the ability to differentiate toward neurons.
［Key words］ adult neural stem cell；CRISPR/Cas9；PIN1
［J Nanjing Med Univ，2021，41（04）：483⁃488，521］

［基金项目］ 国家自然科学基金（31701283，81874144）
∗
通信作者（Corresponding author），E⁃mail：ywang@njmu.edu.cn；daiyifan@njmu.edu.cn