中国组织工程研究 ›› 2026, Vol. 30 ›› Issue (7): 1790-1799.doi: 10.12307/2026.082

• 干细胞培养与分化 stem cell culture and differentiation • 上一篇    下一篇

高/低表达miR-122-5p稳转PC12细胞株的构建和鉴定

陶代菊,苏海玉,王宇琪,沈志强,何  波   

  1. 昆明医科大学药学院暨云南省天然药物药理重点实验室,云南省昆明市   650500
  • 收稿日期:2024-11-12 修回日期:2025-05-21 接受日期:2025-06-20 出版日期:2026-03-08 发布日期:2025-08-20
  • 通讯作者: 沈志强,博士,教授,昆明医科大学药学院暨云南省天然药物药理重点实验室,云南省昆明市 650500 何波,博士,教授,昆明医科大学药学院暨云南省天然药物药理重点实验室,云南省昆明市 650500
  • 作者简介:陶代菊,女,云南省楚雄市人,汉族,昆明医科大学在读博士,主要从事老年病药理学基础研究。
  • 基金资助:
    国家自然科学基金项目(82260271),项目负责人:何波;云南省科技厅科技计划项目(202001AY070001-157),项目负责人:沈志强

Construction and identification of stable PC12 cell lines with high/low expression of miR-122-5p

Tao Daiju, Su Haiyu, Wang Yuqi, Shen Zhiqiang, He Bo    

  1. School of Pharmaceutical Science & Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming 650500, Yunnan Province, China 
  • Received:2024-11-12 Revised:2025-05-21 Accepted:2025-06-20 Online:2026-03-08 Published:2025-08-20
  • Contact: Shen Zhiqiang, PhD, Professor, School of Pharmaceutical Science & Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming 650500, Yunnan Province, China He Bo, PhD, Professor, School of Pharmaceutical Science & Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming 650500, Yunnan Province, China He Bo, PhD, Professor, School of Pharmaceutical Science & Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming 650500, Yunnan Province, China
  • About author:Tao Daiju, Doctoral candidate, School of Pharmaceutical Science & Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming 650500, Yunnan Province, China
  • Supported by:
    National Natural Science Foundation of China, No. 82260271 (to HB); Science and Technology Project of Science and Technology Department of Yunnan Province, No. 202001AY070001-157 (to SZQ)  

摘要:

文题释义:

慢病毒载体:是一种高效的基因工程工具,它能够将目的基因稳定整合到宿主细胞基因组中,具有感染和整合能力强、安全性高等特点,被广泛应用于基因治疗、基因功能研究、组织工程研究等领域。在此次研究中利用慢病毒载体将miR-122-5p基因导入PC12细胞株,确保了它的长期稳定表达。这一方法为研究miR-122-5p在神经系统疾病中的作用机制提供了坚实的实验基础,有助于深入探索其功能并开发新的治疗策略。
PC12细胞株:源自大鼠肾上腺髓质的嗜铬细胞瘤,是一种在神经科学研究中广泛使用的细胞模型,不仅易于培养且稳定性高,还展现出典型的神经内分泌细胞特征。通过在PC12细胞中稳定高/低表达miR-122-5p,能够深入探究miRNA对神经细胞功能、分化以及信号传导的影响,为miR-122-5p在神经系统疾病中的作用机制提供了有力的实验工具。

摘要
背景:MicroRNA-122-5p(miR-122-5p)作为微小RNA(miRNA)家族中的关键成员,在调控基因表达及多种疾病的发生发展中扮演着重要的角色,然而其确切的作用机制尚未完全阐明。构建稳定的miR-122-5p高/低表达 PC12细胞模型,可为深入研究miR-122-5p在神经系统疾病中的确切作用机制以及发现潜在治疗靶点提供有力的实验工具。
目的:旨在构建高/低表达大鼠miR-122-5p慢病毒载体,并以此建立稳定高/低表达miR-122-5p的PC12细胞株,为进一步研究miR-122-5p在神经系统疾病中的作用奠定基础。
方法:根据miR-122-5p基因序列设计合成引物,通过PCR扩增该基因片段。将目的基因定向接入经AgeI/NheI酶切的载体质粒GV369中,构建重组慢病毒质粒。筛选阳性克隆,并进行测序比对结果。将质粒载体与目的质粒载体同293T细胞共培养转染,获得慢病毒原液进行包装和滴度测定。通过体外培养PC12细胞,确定嘌呤霉素工作浓度。慢病毒分别与PC12细胞共培养,确定转染效率,用嘌呤霉素挑选出稳定转染细胞,RT-qPCR法检测稳定转染细胞株的miR-122-5p表达量。

结果与结论:①测序序列与目的序列一致提示重组慢病毒载体构建成功,高表达慢病毒滴度为4×108 TU/mL,miR-122-5p低表达慢病毒滴度为1×109 TU/mL;②PC12细胞嘌呤霉素工作浓度为3.5 μg/mL;③高表达miR-122-5p慢病毒转染PC12细胞的最佳条件为HiTransG P转染增强液,且感染复数值=10;感染复数值=50时低表达miR-122-5p效率最高;④RT-qPCR结果显示,高表达稳转细胞株中miR-122-5p的表达量有明显升高,而低表达稳转细胞株中miR-122-5p表达量显著降低;⑤此次研究成功构建了高/低表达miR-122-5p慢病毒载体,并获得稳转PC12细胞株,为miR-122-5p在神经系统疾病中的进一步研究提供了实验基础。

https://orcid.org/0000-0002-4544-8787 (沈志强) 


https://orcid.org/0000-0002-4029-5435 (何波) 


中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程


关键词: PC12细胞, 微小RNA, 慢病毒载体, 质粒, miR-122-5p, 稳转细胞株, 神经系统疾病, 缺血性脑卒中

Abstract: BACKGROUND: MicroRNA-122-5p (miR-122-5p), as a key member of the microRNA (miRNA) family, plays an important role in regulating gene expression and the occurrence and development of various diseases. However, its precise mechanisms remain incompletely understood. The construction of stable miR-122-5p-overexpressing or miR-122-5p-knockdown PC12 cell models may provide a powerful experimental tool for in-depth studies of the exact mechanism of action of miR-122-5p in neurological diseases and the discovery of potential therapeutic targets.
OBJECTIVE: To construct a lentiviral vector for high/low expression of rat miR-122-5p and use it to establish a PC12 cell line with stable overexpression of high/low expression of miR-122-5p, which would lay the foundation for further research on the role of miR-122-5p in neurological diseases.
METHODS: Synthetic primers were designed according to the miR-122-5p gene sequence, and the resulting gene fragment was amplified via polymerase chain reaction (PCR). A recombinant lentiviral plasmid was constructed via the directional insertion of the target gene into the vector plasmid GV369 digested by AgeI/NheI. Positive clones were screened and sequenced to compare the results. The plasmid vector was cocultured and transfected with the target plasmid vector in 293T cells, and the lentiviral stock solution was obtained for packaging and titer assays. The working concentration of puromycin was determined by culturing PC12 cells in vitro. Lentiviruses were cocultured with PC12 cells separately to determine the transfection efficiency. Stably transfected cells were selected with puromycin, and miR-122-5p expression in the stably transfected cell lines was detected via real-time quantitative PCR.  
RESULTS AND CONCLUSION: (1) The sequencing sequence was consistent with the target sequence, suggesting that the recombinant lentiviral vector was constructed successfully. The lentiviral titer of high expression was 4×108 TU/mL, and the lentiviral titer of low expression of miR-122-5p was 1×109 TU/mL. (2) The working concentration of puromycin in PC12 cells was 3.5 μg/mL. (3) The optimal conditions for the lentiviral transfection of PC12 cells with high expression of miR-122-5p were HiTransG P transfection enhancement solution and an infection complex value equal to 10; the highest efficiency of low expression of miR-122-5p was achieved at an infection complex value of 50. (4) qRT-PCR revealed a significant increase in miR-122-5p expression in stably transfected cell lines and a significant decrease in miR-122-5p expression in stably transfected cell lines. (5) In this study, a miR-122-5p lentiviral vector was successfully constructed, and a stably transformed PC12 cell line was generated, which provides an experimental basis for further study of the role of miR-122-5p in neurological diseases.

Key words:  PC12 cell, microRNA, lentiviral vector, plasmid, miR-122-5p, stable cell line, neurological disease, ischemic stroke

中图分类号: