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顺铂与红细胞膜蛋白相互作用的荧光分光光度法研究

陈宝卫, 王夔   

  1. 北京医科大学药学院无机化学教研室, 北京 100083
  • 收稿日期:1994-12-31 修回日期:1995-05-09 出版日期:1995-09-15 发布日期:1995-09-15

Fluorescence Study on The Interaction Between Cisplatin and Erythrocyte Membrane Proteins

Bao-Wei Chen, Kui Wang   

  1. Department of Inorganic Chemistry, Beijing Medical University, Beijing 100083
  • Received:1994-12-31 Revised:1995-05-09 Online:1995-09-15 Published:1995-09-15

摘要: 顺铂淬灭红细胞膜蛋白的内源性荧光存在浓度依赖关系, 这种性质可用以测定铂与膜蛋白的作用程度。在氯离子和硫酸根存在下, 顺铂的淬灭作用减弱。二者作用也与pH有关, pH条件作用较强。根据顺铂对醋酸汞荧光素标记膜蛋白的荧光的影响, 认为铂与膜蛋白巯基结合。基于共存阴离子的影响, 讨论了顺铂, 膜蛋白可能的反应机制。

关键词: 顺铂, 膜蛋白, 荧光

Abstract: The interaction between cisplatin and erythrocyte membrane proteins was studied based on the quenching effect of cisplatin on the intrinsic fluorescence of proteins. A concentration-dependent quenching effect was observed. The presence of chloride and sulphate weakens the effect significantly. A pH-dependence was also noted with a stronger effect in acidic solution. The nature of the interaction is considered to be platinum-thiol group binding according to the effect of cisplatin on the fluorescence of FMA labeled membrane. The mechanism of the cisplatin-protein interactions was discussed based on the effect of coexisting anion.

Key words: Cisplatin, Membrane protein, Fluorescence

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