中国组织工程研究 ›› 2026, Vol. 30 ›› Issue (35): 9174-9181.doi: 10.12307/2026.454

• 血管组织构建 vascular tissue construction • 上一篇    下一篇

血管内皮生长因子受体2基因敲低大鼠模型的构建及功能验证

钱嘉铭1,李玉梅1,王小乐1,方  婷1,刘福水1,2   

  1. 1江西中医药大学附属医院,江西省南昌市   330006;2江西中医药大学,江西省南昌市   330004
  • 收稿日期:2025-09-19 修回日期:2026-02-12 出版日期:2026-12-18 发布日期:2026-04-28
  • 通讯作者: 刘福水,博士,教授,江西中医药大学附属医院,江西省南昌市 330006;江西中医药大学,江西省南昌市 330004
  • 作者简介:钱嘉铭,男,1995年生,江西省樟树市人,汉族,2025年江西中医药大学毕业,博士,主要从事脊柱外科的研究。
  • 基金资助:
    国家自然科学基金项目(82360940),项目负责人:刘福水;江西省自然科学基金重点项目(20224ACB206041),项目负责人:刘福水;江西省研究生创新专项资金项目(YC2023-B223),项目负责人:钱嘉铭;江西省中医药管理局科技计划项目(2025020818),项目负责人:钱嘉铭

Construction and functional verification of vascular endothelial growth factor receptor 2 gene knockdown rats

Qian Jiaming1, Li Yumei1, Wang Xiaole1, Fang Ting1, Liu Fushui1, 2   

  1. 1Affiliated Hospital of Jiangxi University of Chinese Medicine, Nanchang 330006, Jiangxi Province, China; 2Jiangxi University of Chinese Medicine, Nanchang 330004, Jiangxi Province, China

  • Received:2025-09-19 Revised:2026-02-12 Online:2026-12-18 Published:2026-04-28
  • Contact: Liu Fushui, PhD, Professor, Affiliated Hospital of Jiangxi University of Chinese Medicine, Nanchang 330006, Jiangxi Province, China
  • About author:Qian Jiaming, PhD, Affiliated Hospital of Jiangxi University of Chinese Medicine, Nanchang 330006, Jiangxi Province, China; Jiangxi University of Chinese Medicine, Nanchang 330004, Jiangxi Province, China
  • Supported by:
    National Natural Science Foundation of China, No. 82360940 (to LFS); Key Project of Natural Science Foundation of Jiangxi Province, No. 20224ACB206041 (to LFS); Jiangxi Graduate Student Innovation Fund Project, No. YC2023-B223 (to QJM); Scientific Plan Project of Jiangxi Provincial Administration of Traditional Chinese Medicine, No. 2025020818 (to QJM) 

摘要:



文题释义:
血管内皮生长因子受体2(vascular endothelial growth factor receptor 2,VEGFR2):又名KDR,是细胞膜上的一个信号传导受体,参与调控细胞自噬、凋亡等,与血管生成和肌肉修复密切相关。
基因敲低:是指通过特定技术手段降低目标基因的表达水平,从而抑制其功能。通过合成短发卡RNA或小干扰RNA分子,与目标基因的mRNA结合,阻止其被翻译成蛋白质,从而降低目标基因的表达水平。

背景:血管内皮生长因子受体2主要在血管内皮细胞中表达,在血管生成、组织修复以及疾病发生发展过程中发挥重要作用。腺相关病毒因其独特优势,在机制研究、疾病建模和基因治疗领域得到广泛应用。
目的:构建针对大鼠肌肉组织的血管内皮生长因子受体2基因敲低腺相关病毒载体,检测血管内皮生长因子受体2基因敲低腺相关病毒在大鼠颈部头夹肌的敲低效率,及其对肌肉和血管的影响。
方法:构建载体,并将载体包装进入腺相关病毒,经过SD大鼠筛靶实验,免疫荧光检测病毒感染效率及血管内皮生长因子受体2蛋白表达,荧光定量PCR检测血管内皮生长因子受体2 mRNA表达,最终敲定最佳shRNA序列为Y29478及对照Y9957。取12只SD大鼠随机分为腺相关病毒组和对照腺相关病毒组进行功能验证。将腺相关病毒注射入大鼠头夹肌,20周后利用荧光定量PCR和Western blot检测颈肌血管内皮生长因子受体2 mRNA和蛋白表达,苏木精-伊红染色检测颈肌肌纤维面积,CD31免疫组化检测颈肌微血管数目。
结果与结论:①成功筛选能够敲低血管内皮生长因子受体2表达的shRNA序列及剂量,原位注射血管内皮生长因子受体2基因敲低腺相关病毒的大鼠肌肉组织血管内皮生长因子受体2敲低效率达到60%。②与对照腺相关病毒组比较,腺相关病毒组大鼠的血管内皮生长因子受体2的mRNA和蛋白表达均下降,肌纤维面积减小,微血管数目减少。③成功构建血管内皮生长因子受体2基因敲低大鼠模型,肌肉组织血管内皮生长因子受体2敲低引起肌纤维面积缩小和微血管数目减少。
https://orcid.org/0000-0002-1837-7768 (钱嘉铭) 


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: 血管内皮生长因子受体2, 腺相关病毒, 基因敲低, 原位注射, 血管生成, 肌纤维面积, 肌肉血管

Abstract: BACKGROUND: Vascular endothelial growth factor receptor 2 is mainly expressed in vascular endothelial cells and plays a crucial role in angiogenesis, tissue repair, and the occurrence and development of diseases. Adeno-associated virus, due to its unique advantages, has been widely applied in mechanism research, disease modeling, and gene therapy fields.
OBJECTIVE: To construct an adeno-associated viral vector for vascular endothelial growth factor receptor 2 gene knockdown in rat muscle tissue, determine the knockdown efficiency of vascular endothelial growth factor receptor 2 gene-knockdown adeno-associated virus in the rat sternocleidomastoid muscle and assess its effects on muscle and blood vessels.
METHODS: The vector was constructed, and packaged into adeno-associated virus. Following target screening experiments in Sprague-Dawley rats, immunofluorescence assays were conducted to assess viral infection efficiency and vascular endothelial growth factor receptor 2 protein expression. Quantitative real-time PCR was used to measure vascular endothelial growth factor receptor 2 mRNA expression. Ultimately, the optimal shRNA sequences were determined to be Y29478 and the control sequence Y9957. Twelve Sprague-Dawley rats were randomly divided into an adeno-associated virus group and a control adeno-associated virus group for functional validation. Adeno-associated virus was injected into the rat splenius capitis muscle. Twenty weeks later, fluorescent quantitative PCR and western blot were used to detect vascular endothelial growth factor receptor 2 mRNA and protein expression in the neck muscles. Hematoxylin-eosin staining was used to measure the cross-sectional area of muscle fibers in the neck muscles, and CD31 immunohistochemistry was used to detect the number of microvessels in the neck muscles.
RESULTS AND CONCLUSION: (1) The shRNA sequence and adeno-associated virus dose that could knock down the expression of vascular endothelial growth factor receptor 2 were successfully screened, and the vascular endothelial growth factor receptor 2 knockdown efficiency of rat muscle tissue after in-situ injection of adeno-associated virus with vascular endothelial growth factor receptor 2 reached 60%. (2) Compared with the control adeno-associated virus group, the mRNA and protein expression of vascular endothelial growth factor receptor 2, the muscle fiber area and the number of microvessels in the adeno-associated virus group decreased. (3) A rat model of vascular endothelial growth factor receptor 2 knockdown was successfully established. Knockdown of vascular endothelial growth factor receptor 2 in muscle tissue resulted in reduced muscle fiber cross-sectional area and decreased microvessel number. 

Key words: vascular endothelial growth factor receptor 2, adeno-associated virus, gene knockdown, in-situ injection, angiogenesis, muscle fiber area, muscle vessel

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