高等学校化学学报 ›› 2016, Vol. 37 ›› Issue (6): 1148.doi: 10.7503/cjcu20160180

• 高分子化学 • 上一篇    下一篇

Fe3O4纳米粒子与慢病毒载体共同感染内皮祖细胞的促血管新生和MRI示踪的应用

王娟1, 周兵2, 王欣欣3, 吴秀娟1, 厉婷1, 张文科3, 刘亢丁1()   

  1. 1. 吉林大学第一医院, 长春 130021
    2. 吉林大学化学学院物理化学系, 长春 130012
    3. 超分子结构与化学国家重点实验室, 吉林大学化学学院, 长春 130012
  • 收稿日期:2016-03-25 出版日期:2016-06-10 发布日期:2016-05-10
  • 作者简介:联系人简介: 刘亢丁, 女, 博士, 教授, 主要从事神经病学脑血管病研究. E-mail:kangdingliu@163.com
  • 基金资助:
    国家自然科学基金(批准号: 81271294)资助

Preparation of Fe3O4 Nanoparticles and Lentiviral Vector Infected EPCs for the Improvement of Angiogenesis and MRI Tracing

WANG Juan1, ZHOU Bing2, WANG Xinxin3, WU Xiujuan1, LI Ting1, ZHANG Wenke3, LIU Kangding1,*()   

  1. 1. the First Hospital, Jilin University, Changchun 130021, China
    2. Department of Physical Chemistry, College of Chemistry,3. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University,Changchun 130012, China
  • Received:2016-03-25 Online:2016-06-10 Published:2016-05-10
  • Contact: LIU Kangding E-mail:kangdingliu@163.com
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.81271294)

摘要:

采用化学共沉淀法制备了柠檬酸钠修饰Fe3O4 纳米粒子(NPs), 使用胎牛血清(FBS)改善Fe3O4 NPs的分散性. 实验表明Fe3O4 NPs尺寸均匀, 且具有良好的稳定性, FBS浓度小于5%(体积分数) 时, Fe3O4 NPs无聚集沉淀; 在300 K下, 饱和磁化强度达到74.86×10-3 A·m2/g(74.86 emu/g); 核磁共振T2序列成像时, 75 μg/mL Fe3O4 NPs与慢病毒载体(LV)共同标记内皮祖细胞(EPCs)成像效果良好; 而且EPCs具有稳定过表达目的基因血管内皮生长因子(VEGF)的能力. 利用Fe3O4 NPs与LV共同感染EPCs, 可有效促进大鼠血管生成. 说明修饰后的EPCs兼具核磁共振成像(MRI)示踪和促血管生成双重功能.

关键词: Fe3O4纳米粒子, 内皮祖细胞, 慢病毒载体, 血管内皮生长因子, 磁共振成像

Abstract:

Fe3O4 nanoparticles(NPs) modified with sodium citrate were prepared via chemical coprecipitation method and fetal bovine serum(FBS) could improve the dispersibility of Fe3O4 NPs in FBS solution(volume fraction≤5%). At the temperature of 300 K, the saturation magnetization intensity of NPs reached 74.86×10-3 A·m2/g(74.86 emu/g); MRI T2 imaging of endothelial progenitor cells(EPCs) became better after being infected by 75 μg/mL of Fe3O4 NPs and lentiviral vectors(LV); furthermore, EPCs could stably over express VEGF target gene. EPCs co-infected with Fe3O4 NPs and LV, after being injected into caudal vein of focal cerebral ischemia rats could effectively promote angiogenesis. These results indicated the modified EPCs possessed both MRI tracing and angiogenesis, and therefore had potential application value in clinical therapy of cerebral ischemia.

Key words: Fe3O4 nanoparticles, Endothelial progenitor cell, Lentiviral vector, Vascular endothelial growth factor, Magnetic resonance imaging

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