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中国临床药理学与治疗学 ›› 2004, Vol. 9 ›› Issue (6): 628-632.

• 研究原著 • 上一篇    下一篇

聚乙二醇化学修饰的重组L-门冬酰胺酶对小鼠白血病细胞P388的抑制作用

曹荣月, 钱之玉1, 竞永华, 申克宇, 刘景晶   

  1. 中国药科大学生命科学与技术学院,1药学院, 南京210009, 江苏
  • 收稿日期:2003-12-30 修回日期:2003-12-30 发布日期:2020-11-22
  • 通讯作者: 钱之玉, 男,教授, 博士生导师, 从事药理学研究。Tel:025-83271322
  • 作者简介:曹荣月, 女, 讲师, 药理学博士生, 从事药理学和生化研究。Tel:025-83271369  E-mai l:Caorongyuenanjing @yahoo.com.cn;刘景晶, 男, 教授, 留美博士后, 博士生导师, 从事微基因药物和生化药学研究。Tel:025-83271242  E-mai l:liujingj@public1.ptt.js.cn
  • 基金资助:
    江苏省科技厅应用基础项目(NoBJ2000033); 江苏省自然科学基金(NoBK2001078)

Antitumor effects of recombinant L-asparaginase modified by polyethylene glycol for mice leukemia cell P388

CAO Rong-Yue, QIAN Zhi-Yu1, JING Yong-Hua, SHEN Ke-Yu, LIU Jing-Jing   

  1. School of Life Science and Technology, 1Pharmaceutical school, China Pharmaceutical University, Nanjing 210009, Juangsu, China
  • Received:2003-12-30 Revised:2003-12-30 Published:2020-11-22

摘要: 目的 考察聚乙二醇(polyethylene glycol,PEG)化学修饰的重组L-门冬酰胺酶(recombinant Lasparaginase, rL-ASP)的抗肿瘤活性。 方法 PEG 化学修饰rL-ASP, 获得的化学修饰酶(polyethylene glycolmodified recombinant L-asparaginase, rL-ASP-PEG)利用十二烷基硫酸钠-聚丙烯酰胺凝胶电泳法(sodium dodecyl sulfate polyacrylamide gel electrophoresis,SDS-PAGE)观察其分子大小变化, 四甲基偶氮唑盐(3-(4, 4-dimcthylthioazol-2-yl)-2, 5-diphenyl-tetrazolium bromide, MTT)法和流式细胞仪(flow cytometer, FCM)检测rL-ASP-PEG 对体外培养的小鼠白血病细胞P338增殖作用的抑制作用, 腹腔给药考察rL-ASPPEG对小鼠移植性实体瘤P338 抑瘤效果, 透射电镜(transmission electron microscopy, TEM)观察rL-ASPPEG引起的肿瘤组织超微病理变化。 结果 SDSPAGE显示, rL-ASP-PEG 的分子量大于rL-ASP;MTT实验表明, rL-ASP-PEG 能抑制体外培养的小鼠P388白血病细胞的增殖, 半数有效浓度(inhibitory concentration50 %, IC50)为2.056 IU·ml-1。FCM 结果表明, rL-ASP-PEG 主要将肿瘤细胞P388 抑制在G0 +G1期,S 期细胞减少。DBA/2 荷瘤小鼠的抑瘤实验表明rL-ASP-PEG 对移植性实体瘤P338 有显著抑制作用, P 值<0.001。超微病理切片显示rL-ASP-PEG引起肿瘤组织坏死。 结论 rL-ASP 经过聚乙二醇化学修饰后, 具有肿瘤抑制作用。

关键词: 重组L-门冬酰胺酶, 聚乙二醇, 肿瘤抑制, 化学修饰, 半数有效浓度, 白血病, 十二烷基硫酸钠-聚丙烯酰胺凝胶电泳法

Abstract: AIM: To study the antitumor effects of chemical modification enzyme which recombinant L-asparaginase (rL-ASP)modified by monomethoxy-polyethylene glycol (mPEG). METHODS: PEG modification of rLASP formed rL-ASP-PEG and compared molecular weight of rL-ASP and rL-ASP-PEG with sodium dodecyl sulfaete polyacrylamide gel electrophoresis (SDS-PAGE).Anti-tumor activity was tested by (3-(4, 4-dimcthylthioazol-2-yl)-2, 5-diphenyl tetrazolium bromide analysis(MTT)and apoptosis was valued by flow cytometry (FCM)in vivo.The effect of Anti-tumor activity was evaluated by weights of solid tumor of P338 on DBA/2 mice in vitro.Transmission electron microscopy (TEM)observed the effects of rLASP-PEG inhibiting P388 solid tumor on DBA/2 mice. RESULTS: rL-ASP-PEG had significant antitumor effects on P388 cells, and the inhibitory concentration 50 %(IC50)of rL-ASP-PEG was 2.056 IU·ml-1 .FCM data showed that the ultramicro pathological picture of transplant tumor in TEM that L-ASP-PEG reacting showed the tumor cells necrosis. CONCLUSION: rL-ASP-PEG shows a significant effect of antitumor.

Key words: recombinant L-asparaginase (rL-ASP), polyethyethylene glycol(PEG), antitumor, chemical modification, inhibitory concentration 50%(IC50), leukemia, sodium dodecyl sulfate polyacrylamide gel electrophoresis(SDS-PAGE)

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