波谱学杂志 ›› 1997, Vol. 14 ›› Issue (6): 527-532.

• 研究论文 • 上一篇    下一篇

肿瘤细胞诱导分化剂HMBA对自旋标记物TEMPO与蛋白质结合的影响及其意义

颉东旭1, 冯良波2, 李树本2, 任礼勤1   

  1. 1 兰州军区总医院医务部, 兰州 730050;
    2 中国科学院兰州化学物理研究所, 兰州 730000
  • 收稿日期:1997-04-01 修回日期:1997-07-15 出版日期:1997-12-05 发布日期:2018-01-22
  • 作者简介:颉东旭,男,32岁,理学博士,主治医师

HEXAMETHYLENE BISACETAMIDE (HMBA) EFFECTS ON ESR SPECTRA OF TEMPO LABELING IN PROTEINS

Xie Dongxu1, Feng Liangbo2, Li Shuben2, Ren Liqin1   

  1. 1 Administration Department of Lanzhou General Hospital of Lanzhou Command PLA, Lanzhou 730050;
    2 State Key Laboratory of Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physcis, The Chinese Academy of Sciences, Lanzhou 730000
  • Received:1997-04-01 Revised:1997-07-15 Online:1997-12-05 Published:2018-01-22

摘要: 在将TEMPO掺入肿瘤细胞用以研究化学诱导分化剂六亚甲基二乙酰胺(HMBA)诱导分化机理的实验中,观察到一种强的单峰波谱,TEMPO掺入到了蛋白质分子的内部可能形成了局部的高浓度.肿瘤细胞诱导分化剂HMBA在诱导浓度范围内可使一些蛋白质分子的构象发生变化,改变TEMPO与蛋白质分子的结合.因此,HMBA在诱导肿瘤细胞分化的过程中,一定对一些蛋白质分子有直接的作用.

关键词: 自旋标记, 肿瘤, 诱导, 分化, 六亚甲基二乙酰胺

Abstract: An ESR spectrum of 4-hydroxy-2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO) labeled on human bladder carcinoma (BIU-87) cells and its fraction was detected for the effect of HMBA which can induce many types of tumor cells differentiation toward normal cell. TEMPO molecules might be located inside proteins. Bound TEMPO molecules, at least some of them, are reversible at the existance of hexamethylene bisacetamide (HMBA).These results suggest that they must be involved in the direct action on some proteins during HMBA's inducing the differentiation of tumor cells.

Key words: Spin label, Tumor, Induce, Differentiation, Hexamethylene bisacetamide