中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (18): 2821-2827.doi: 10.3969/j.issn.2095-4344.2017.18.006

• 纳米生物材料 nanobiomaterials • 上一篇    下一篇

多功能铁铋复合纳米粒对胶质母细胞瘤的放疗增敏作用

牛媛媛1,于  明1,杜凤移2,陈思远1,赵  天3,徐宇浩1,周倩文1,许修健1 
  

  1. 江苏大学附属医院,1神经内科,3医学影像科,江苏省镇江市  212001;2江苏大学医学院,江苏省镇江市  212013
  • 收稿日期:2017-01-13 出版日期:2017-06-28 发布日期:2017-07-07
  • 通讯作者: 于明,博士,硕士生导师,主任医师,副教授,江苏大学附属医院神经内科,江苏省镇江市 212001
  • 作者简介:牛媛媛,女,1989年生,河南省新乡市人,汉族,江苏大学在读硕士,主要从事新型纳米材料的研制及在心脑疾病中的应用研究。
  • 基金资助:

    江苏省“333工程”科研项目(BRA2014173);江苏省“六大人才高峰”科研项目(WSN-038)

Fabrication of multifunctional bismuth-doped iron nanoparticle and its radiotherapy sensitization in glioblastoma

Niu Yuan-yuan1, Yu Ming1, Du Feng-yi2, Chen Si-yuan1, Zhao Tian3, Xu Yu-hao1, Zhou Qian-wen1, Xu Xiu-jian1
  

  1. 1Department of Neurology, 3Department of Imaging, Affiliated Hospital of Jiangsu University, Zhenjiang 212001, Jiangsu Province, China; 2Jiangsu University Medical School, Zhenjiang 212013, Jiangsu Province, China
  • Received:2017-01-13 Online:2017-06-28 Published:2017-07-07
  • Contact: Yu Ming, M.D., Master’s supervisor, Chief physician, Associate professor, Department of Neurology, Affiliated Hospital of Jiangsu University, Zhenjiang 212001, Jiangsu Province, China
  • About author:Niu Yuan-yuan, Studying for master’s degree, Department of Neurology, Affiliated Hospital of Jiangsu University, Zhenjiang 212001, Jiangsu Province, China
  • Supported by:

    the “333 Engineering” Scientific Research Project of Jiangsu Province, No. BRA2014173; the “Six Talent Peaks” Scientific Research Project of Jiangsu Province, No. WSN-038

摘要:

文章快速阅读:

 

文题释义:
放射增敏剂
:是能够增强生物体放射敏感性的一类物质,它可增强射线对肿瘤的杀伤能力,特别有助于解决实体肿瘤中乏氧细胞对射线的抗性所导致肿瘤放疗治愈率低的问题。近年来纳米材料成为研究的热点,纳米粒子(如Au、Pt、Bi、Ta、Gd等)具有高X射线光子捕获截面和康普顿散射效应,产生的剂量增强效应可提高DNA等敏感靶分子的放射损伤,对受照细胞产生放射增敏作用。
透明质酸功能化的复合纳米材料:①此纳米粒子呈近似球形,粒径较为均一,单分散性好,没有团聚现象,能很好地被细胞吞噬;②实验的复合纳米材料是由具有放疗作用的铋离子和铁离子构成,经过透明质酸功能化后能与CD44特异性结合,聚集与肿瘤周围,可实现放疗增敏的效果。

背景:透明质酸功能化的铁铋复合纳米颗粒是一种有效MRI对比剂,同时又可作为放疗增敏剂。
目的:制备透明质酸功能化的铁铋复合纳米颗粒,观察其对胶质母细胞瘤U87MG的放疗增敏作用。
方法:通过水热聚醇法制备透明质酸功能化的铁铋复合纳米颗粒HA-BiIOPs。①细胞毒性实验:取对数生长期的人胶质母细胞瘤细胞株U87MG与大鼠血管平滑肌细胞,均以含0,12.5,25,50,100,200,   400 mg/L HA-BiIOPs的培养液培养48 h,计算细胞增殖率;②组织相容性实验:在ICR小鼠尾静脉注射HA-BiIOPs溶液,观察小鼠脏器病理变化;③细胞吞噬实验:将HA-BiIOPs与U87MG细胞共培养6 h,普鲁士蓝观察纳米颗粒是否被细胞吞噬;④放疗增敏实验:取对数生长期的U87MG细胞,分组培养:对照组以培养液培养;放疗组分别给予0,3,6,9 Gy的X射线照射;HA-BiIOPs组分别加入含0,12.5,25,50,100,200,400 mg/L HA-BiIOPs的培养液;联合组,先加入含0,12.5,25,50,100,200,400 mg/L HA-BiIOPs的培养液,再给予0,3,6,9 Gy的X射线照射。24 h后,检测细胞增殖率及克隆形成率。
结果与结论:①不同质量浓度的HA-BiIOPs对血管平滑肌细胞和U87MG细胞增殖无明显影响;②尾静脉注射HA-BiIOPs溶液后,小鼠脏器未发生病理变化;③共培养6 h 后,HA-BiIOPs纳米颗粒可被U87MG细胞吞噬;④U87MG细胞增殖率与HA-BiIOPs质量浓度(0-200 mg/L)和放射剂量(0-9 Gy)有明显的线性负相关,尤其是在6 Gy X射线照射下200 mg/L HA-BiIOPs对细胞增殖率下降至(41±7)%。选用100 mg/L HA-BiIOPs、6 Gy X射线照射进行克隆形成实验,联合组U87MG细胞增殖率明显低于空白对照组、放疗组(P < 0.05);⑤结果表明,透明质酸功能化的铁铋复合纳米颗粒对胶质母细胞瘤具有显著的放疗增敏作用。

关键词: 生物材料, 纳米材料, 铁铋复合纳米材料, 水热聚醇法, 放疗增敏, 透明质酸, 人胶质母细胞瘤细胞, 生物相容性, 杀伤肿瘤, 细胞增殖率

Abstract:

BACKGROUND: Bismth-doped iron nanoparticles modified by hyaluronic acid (HA-BiIOPs) not only act as an effective MRI contrast agent, but also as a radiotherapy sensitizer.
OBJECTIVE: To fabricate the HA-BiIOPs and to observe its effect to enhance the radiosensitivity of glioblastoma cells U87MG under X-ray radiation.
METHODS: HA-BiIOPs were synthesized using hydrothermal polyol method. (1) Cytotoxicity: A cytotoxicity test was carried out on U87MG cells and rat vascular smooth muscle cells (VSMCs). Cell proliferation rate of two kinds of cells cultured with different concentrations of HA-BiIOPs (0, 12.5, 25, 50, 100, 200, 400 mg/L) at 24 hours after culture were determined by cell counting kit-8 assay. (2) Histological analysis: ICR mice were sacrificed after intravenous injection of HA-BiIOPs, and pathological changes of mouse visceral organs were observed under an optical microscope. (3) Cellular uptake: The HA-BiIOPs after entered into the cytoplasm were observed by Prussian blue staining. (4) Radiosensitization test: U87MG cells at Logarithmic growth stage were cultured in culture medium as control group, subjected to X-ray irradiation (0, 3, 6, 9 Gy) as radiotherapy group, cultured in HA-BiIOPs (0, 12.5, 25, 50, 100, 200 and 400 mg/L) as HA-BiIOPs group or subjected to HA-BiIOPs culture plus X-ray irradiation as combined therapy group. Then, the cell proliferation rate and cloning efficiency were measured at 24 hours after treatment.
RESULTS AND CONCLUSION: (1) The HA-BiIOPs at different concentrations were non-cytotoxic for VSMC and U87MG cells. (2) After intravenous injection of HA-BiIOPs, there was no obvious toxicity to the mouse susceptible organs. (3) After 6 hours of culture, the HA-BiIOPs could be internalized by U87MG cells. (4) The proliferation rate of U87cells was negatively correlated with the concentration of HA-BiIOPs (0-200 mg/L) and X-ray dose (0-9 Gy). Especially, the combination of 6 Gy X-ray irradiation with 200 mg/L HA-BiIOPs dramatically decreased the cell viability that was decreased to (41±7)%. In the combined therapy group with 6 Gy X-ray and 100 mg/L HA-BiIOPs, the cells proliferation rate was significantly lower than that in the control and radiotherapy groups (P < 0.05). These results indicate that HA-BiIOPs have a radiosensitizative effect on glioblastoma cells U87MG.

Key words: Hyaluronic Acid, Nanocomposites, Glioblastoma, Tissue Engineering

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