华西口腔医学杂志

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隐形顺铂聚乳酸纳米微粒对口腔鳞癌原发灶的靶向性研究

杨 凯1,陈绍维2,陈 睿1,温玉明2   

  1. 1.重庆医科大学附属第一医院 口腔颌面外科,重庆400016; 2.四川大学华西口腔医学院 口腔颌面外科学教研室,四川 成都610041
  • 收稿日期:2005-10-25 修回日期:2005-10-25 出版日期:2005-10-20 发布日期:2005-10-20
  • 通讯作者: 杨 凯, Tel: 023-89011227
  • 作者简介:杨 凯(1965-),男,重庆人,副教授,博士
  • 基金资助:
    重庆市科委应用基础研究资助项目(渝科发计字〔2003〕43 号);重庆医科大学科技基金资助项目(XB200207)

Experimental Study of Cisplatin Loaded Polylactic Acid-polyethylene Glycol Nano-particles for Targeting Oral Carcinoma

YANGKai1,CHENShao-wei2,CHENRui1,WENYu-ming2   

  1. 1.Dept.ofOral andMaxillofacialSurgery,The FirstAffili- atedHospital,Chongqing University ofMedical Sciences,Chongqing400016,China;2.Dept.ofOral andMaxillofacial Surgery, West China College ofStomatology,Sichuan University,Chengdu610041,China
  • Received:2005-10-25 Revised:2005-10-25 Online:2005-10-20 Published:2005-10-20

摘要: 目的 研究隐形顺铂聚乳酸纳米微粒(CDDP-PLA-PEG-NP)的物理特性及对口腔鳞癌原发灶的靶向性。方 法 用乳化溶剂蒸发法制备CDDP-PLA-PEG-NP;建立地鼠口腔颊鳞癌模型,并随机将64只动物分为实验组和对照 组,每组各32只。实验组和对照组分别静脉注射CDDP-PLA-PEG-NP(6·6 mg/kg)和CDDP(1 mg/kg),每组于给药后 0·083、0·5、1、2、4、6、12、24 h各处死4只动物。用高效液相色谱仪测定两组各时间点血浆和癌组织中药物浓度,求 出CDDP-PLA-PEG-NP对口腔鳞癌原发灶的靶向指数、选择性指数和口腔鳞癌原发灶对CDDP-PLA-PEG-NP的相对摄 取率。结果 CDDP-PLA-PEG-NP的平均粒径为(143·2±1·8)nm,粒径分布范围为103·5 ~175·8 nm,载药量和包封 率分别为(15·2±0·9)%、(89.0±0·8)%;在8个时间点的靶向指数和选择性指数均远大于1,口腔癌组织对CDDP- PLA-PEG-NP的摄取量是CDDP的10·36倍。结论 CDDP-PLA-PEG-NP在动物体内对口腔鳞癌原发灶具有良好的靶 向性,是具有发展前途的口腔癌纳米靶向给药系统。

关键词: 鳞状细胞癌, 纳米粒, 顺铂, 聚乙二醇, 聚乳酸

Abstract:

Objective To investigate the target deliver of Cisplatin to oral carcinoma tissues by intravenous injection of Cispla- tin loaded polylactic acid- polyethylene glycol nanoparticles(CDDP-PLA-PEG-NP).Methods CDDP-PLA-PEG-NP was pre- pared by the emulsion-solvent evaporation method. The buccal cancer model was established in 64 golden hamsters, which were divided randomly into two groups for 32 animals in each group, CDDP-PLA-PEG-NP(6·6 mg/kg ) and CDDP(1 mg/kg)were re- spectively injected into mice tail vein. At 0·083、0·5、1、2、4、6、12、24 h after drug administration. 4 animals in each group were sacrificed and CDDP concentration in the plasma and tumorwere determined by high performance liquid chromatography. Targeting ability was evaluated by targeting index(TI), selectivity index(SI) and relative extraction efficiency(re).Results The average diameter of CDDP-PLA-PEG-NPwas (143·2±1·8)nm. The diameter distributionwas from 103·5 nmto 175·8 nm. Drug loading and embedding ratio were (15·2±0·9)%,(89.0±0·8)% respectively. Values of TI and SI are more than 1 at 8 time points. The area under CDDP concentration-time curve of oral carcinoma tissues in CDDP-PLA-PEG-NP group was 10.36 times as many as that in CDDP group.Conclusion CDDP-PLA-PEG-NP can specifically deliver CDDP to oral carcinoma tissues by vein injec- tion. Stealth anticancer nano-particle system can be regarded as a valuable drug deliver system to treat oral carcinoma.

Key words: squamous cell carcinoma, nanoparticles, cisplatin, polylactic acid, polyethylene glycol