摘要
采用荧光光谱(FS)、核磁共振(NMR)、电喷雾离子化质谱(ESI-MS)和透射电镜(TEM)方法研究过氧钒配合物(NH4)[VO(O_2)_2(bipy)]?4H_2O(1)和(NH_4)[VO(O_2)2(phen)]?2H_2O(2)与朊蛋白淀粉样肽Pr P106-126的突变体M109F肽的相互作用。结果表明,过氧钒配合物可直接与M109F肽结合,并通过甲硫氨酸112的氧化作用来达到对M109F肽聚集的抑制作用。与配合物2比较,配合物1显示出对M109F肽更好的抑制作用;过氧钒配合物1和2都可以有效地降低M109F肽诱导的细胞毒性。本工作为潜在金属药物用于神经退行性疾病的研究提供了基础数据。
Interactions of peroxovanadium complexes(NH4)[VO(O2)2(bipy)]·4H2O(1) and(NH4)[VO(O2)2(phen)]·2H2O(2) with the mutant peptide M109 F of prion neuropeptide Pr P106- 126 have been investigated by fluorescence spectroscopy(FS), nuclear magnetic resonance(NMR), electron spray ionization mass spectrometry(ESI- MS) and transmission electron microscopy(TEM) methods. The results show that the peroxovanadium complexes may directly bind to the M109 F peptide, and react with the peptide by methionine oxidation at Met112, resulting in the inhibition of M109 F peptide aggregation. Compared with complex 2, complex1 shows improved inhibitory effects on peptide M109 F. Both complexes 1 and 2 exhibit an increased cellular viability against amyloid peptide- induced cytotoxicity. The basic data for the investigation of potential metallodrugs against neurodegenerative disease are provided.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2016年第7期1810-1818,共9页
Acta Physico-Chimica Sinica
基金
国家自然科学基金(21271185
21473251)资助项目~~
关键词
朊蛋白神经肽
过氧钒配合物
纤维化
甲硫氨酸氧化
细胞毒性
Prion neuropeptide
Peroxovanadium complex
Fibril formation
Methionine oxidation
Cytotoxicity