中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (51): 8292-8296.doi: 10.3969/j.issn.2095-4344.2014.51.017

• 组织构建基础实验 basic experiments in tissue construction • 上一篇    下一篇

新型阳离子磷酸胆碱聚合物可作为反义寡核苷酸基因的运输载体

鲁永织1,孙甜甜2,曹希传2,张卓琦1,王志荣1,徐 晤1,郝湛军1,王向东1,张超群1,夏 勇1,李东野1   

  1. 1徐州医学院附属医院心内科,江苏省徐州市 221002;2中国矿业大学材料科学与工程学院,江苏省徐州市 221116
  • 出版日期:2014-12-10 发布日期:2014-12-10
  • 通讯作者: 张卓琦,徐州医学院附属医院心内科,江苏省徐州市 221002
  • 作者简介:鲁永织,女,1984年生,山东省青岛市人,汉族,2010年徐州医学院毕业,硕士,主治医师,主要从事心血管基因治疗研究。
  • 基金资助:

    课题受国家自然科学基金(30800219,30670557);江苏省高校自然科学基金(08KJD320013);徐州医学院院长专项人才基金(07KJZ26)资助

Novel cationic phosphorylcholine polymer acts as an anti-sense oligonucleotide gene delivery carrier

Lu Yong-zhi1, Sun Tian-tian2, Cao Xi-chuan2, Zhang Zhuo-qi1, Wang Zhi-rong1, Xu Wu1, Hao Zhan-jun1, Wang Xiang-dong1, Zhang Chao-qun1, Xia Yong1, Li Dong-ye1   

  1. 1Department of Cardiology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, Jiangsu Province, China; 2College of Materials Science and Engineering, Chinese University of Mining and Technology, Xuzhou 221116, Jiangsu Province, China
  • Online:2014-12-10 Published:2014-12-10
  • Contact: Zhang Zhuo-qi, Department of Cardiology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, Jiangsu Province, China
  • About author:Lu Yong-zhi, Master, Attending physician, Department of Cardiology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, Jiangsu Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 30800219, 30670557; Natural Science Foundation of Jiangsu Universities, No. 08KJD320013; Special President Talent Fund of Xuzhou Medical College, No. 07KJZ26

摘要:

背景:病毒类基因载体虽然具有较高的转染效率,其安全性一直受到人们的质疑。

 

目的:以阳离子磷酸胆碱聚合物作为基因药物运输的载体,研究其对人类c-myc反义寡核苷酸(AS-ODN)的负载和运输能力,并对其安全性和有效性进行评价,

 

方法:应用原子转移自由基聚合法合成具有高度生物相容性的双嵌段磷酸胆碱聚合物MPC30-DEA70,并对其溶液进行表征。用DNA凝胶电泳法对MPC30-DEA70与针对AS-ODN生成不同N/P比值的基因复合物进行表征。将MPC30-DEA70/AS-OD基因复合物转染至体外培养的HEK293细胞,检测其细胞相容性、转染效率和细胞内转运机制。

 

结果与结论:MPC30-DEA70在pH=4.0-11.0范围内的0.01 mol/L PBS中显示出高度水溶性,其正电性随pH值降低而增强。MPC30-DEA70/AS-ODN基因复合物在DNA凝胶电泳中显示出不同程度的电泳迟滞,随电性增强而显著。MTT法检测显示MPC30-DEA70对HEK293细胞株的毒性呈剂量依赖性,高浓度下细胞毒性显著增强。流式细胞术检测发现复合物的转染随N/P比值增加而显著增强;共聚焦显微镜观察到AS-ODN分子在细胞核内的转运,提示其有效的核定位。证实新型阳离子磷酸胆碱聚合物可以有效负载和运输反义寡核苷酸,是一种高效安全的非病毒类转基因载体。

 


中国组织工程研究
杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程


全文链接:

关键词: 组织构建, 组织工程, 磷酸胆碱聚合物, 反义寡核苷酸, 基因运输, 非病毒载体, 基因治疗, 国家自然科学基金

Abstract:

BACKGROUND: Although viral gene vector has high transfection efficiency, its safety has been questioned.

OBJECTIVE: To study the effect of gene-based drug delivery with the carrier of cationic phosphorylcholine polymers on the load and transport capacity of human c-myc anti-senseoligodeoxynucleotide, and to evaluate the safety and efficacy.
METHODS: Highly biocompatible diblock phosphorylcholine copolymer MPC30-DEA70 was synthesized using atom transfer radical polymerization and the copolymer solutions were characterized. Under different conditions, DNA complexes were formed between MPC30-DEA70 and c-myc anti-senseoligodeoxynucleotide at different N/P ratios, which were characterized by DNA gel electrophoresis. The MPC30-DEA70/AS-OD gene complexes  
were transfected into the in vitro cultured HEK293 cells to detect the cell compatibility, transfection efficiency and mechanism of intracellular transport.
RESULTS AND CONCLUSION: The results showed that the material MPC30-DEA70 at pH=4.0-11.0, showed a high degree of water-soluble property in 0.01 mol/L PBS solution, and the positive charge was increased with the decreasing of solution pH value. MPC30-DEA70/AS-ODN complexes showed different degrees of gel retardation in DNA gel electrophoresis, and was increased significantly with the increasing of N/P ratios. Methylthiazolyldiphenyl-tetrazolium bromide assay showed that the MPC30-DEA70 inhibited the viability of the HEK293 in a dose-dependent manner, and cell toxicity was significantly increased in high dose MPC30-DEA70. Flow cytometry study showed the transfection of the complexes was significantly enhanced with the increasing of N/P ratios. Confocal microscopy study found the transferred anti-senseoligodeoxynucleotide molecules in the cell nucleus, suggesting its effective nuclear localization. The results indicate that novel cationic phosphorylcholine copolymer can load and transport anti-senseoligodeoxynucleotide, which may act as an efficient and safe non-viral gene transfer vector.


中国组织工程研究
杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程


全文链接:

Key words: gene therapy, genetic vectors, oligonucleotides, antisense, cations, polymers

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