http://jcps.bjmu.edu.cn

• 研究论文 • 上一篇    下一篇

用连接叶酸的脂质体增加对体外培养的HeLa细胞的输送

力弘, 刘敏, 贾永锋, 谢成英, 陆伟跃*   

  1. 1. 上海医科大学药学院药理教研室, 上海 200032;
    2. 上海医科大学药学研究所药物靶向制剂研究室, 上海 200032;
    3. 上海长宁区中心医院药剂科, 上海 200051
  • 收稿日期:1999-09-29 修回日期:2000-01-13 出版日期:2000-06-15 发布日期:2000-06-15
  • 通讯作者: 陆伟跃*

Delivery of Folio Acid Conjugated Liposomes Into Cultured HeLa Cells

Li Hong, Liu Min, Jia Yongfeng, Xie Chengying, Lu Weiyue*   

  1. 1. Department of Pharmacology School of Pharmacy Shanghai Medical University Shanghai 200032;
    2. Department of Targeting harmaceutical Institute of Pharmacy, Shanghai Medical University Shanghai 200032;
    3. Department of Pharmacy Changning Central Hospital, Shanghai 200051
  • Received:1999-09-29 Revised:2000-01-13 Online:2000-06-15 Published:2000-06-15
  • Contact: Lu Weiyue*

摘要: 在传代培养的HeLa细胞上观察了叶酸对脂质体靶向摄取功能的影响。将内含钙黄绿素的叶酸.脂质体和脂质体分别加入HeLa细胞中培养,并以荧光法检测细胞摄取量。共同培养4h,细胞摄取叶酸一脂质体量为脂质体4倍以上,0.45 mg·mL-1时达饱和; 过量游离叶酸竞争抑制细胞对叶酸-脂质体的摄取; 磷脂酶D或磷脂酰肌醇特异性磷脂酶C通过影响叶酸受体而抑制细胞对叶酸-脂质体的摄取。因此, HeLa细胞主要通过叶酸受体途径介导摄取叶酸-脂质体:叶酸受体高表达或高活性细胞摄取叶酸-脂质体的能力较未接叶酸的脂质体显著提高。

关键词: 叶酸受体, 叶酸脂质体, HeLa细胞, 靶向

Abstract: Effect of folio acid on delivery of liposomes was examined using cultured HeLa cells. Folateliposomes encapsulating calcein and liposomes were cultured with HeLa cells respectively. Liposomes taken up bycells were measured by a fluorescence spectrophotometer. The cell fluorescence increased slowly at the 4 h timepoint, and the saturated folate-liposome concentration was 0.45 mg·mL-1. The binding of folate-liposomes to HeLacells could be competitively inhibited by excess free folate. Enzyme phospholipase D (PLD) or phosphatidylinositolspecific phospholipase C (PIPLC) influenced liposome uptake via folate receptor. Folate targeting improved the specificity of liposomes for cells which overexpressed the folate receptors.

Key words: Folate receptor, Folate-liposome, Folate receptor, Folate-liposome, HeLa cells, HeLa cells, Target, Target

Supporting: *Project supported by the National Natural Science Foundation of China (No.39670859) and by the Research Fund for the Doctoral Program of Higher Education No.9506183.