A Comparative Interaction between Copper Ions with Alzheimer's β Amyloid Peptide and Human Serum Albumin.

A Comparative Interaction between Copper Ions with Alzheimer's β Amyloid Peptide and Human Serum Albumin.
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DOI:
10.1155/2012/208641
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发表时间:
2012
影响因子:
3.8
通讯作者:
Saboury AA
Saboury AA
中科院分区:
化学3区
文献类型:
--
作者:
Behbehani GR;Barzegar L;Mohebbian M;Saboury AA

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采用等温滴定量热法研究了310 K、pH7.2水溶液中Cu ~(2+)与阿尔茨海默氏淀粉样β肽Aβ(1-16)前16位残基及人血清白蛋白(HSA)的相互作用。从扩展溶剂化模型恢复的溶剂化参数表明,HSA参与铜离子的运输。Aβ(1-16)和铜离子之间的复合物被认为是阿尔茨海默病发展中的异常相互作用,其中Cu 2+参与Aβ(1-16)聚集。稳定性指标表明,HSA能迅速清除Aβ(1-16)中的Cu ~(2+),降低Cu诱导的Aβ(1-16)聚集,显著降低Aβ(1-16)+Cu ~(2+)的毒性。
The interaction of Cu2+ with the first 16 residues of the Alzheimer's amyliod β peptide, Aβ (1–16), and human serum albumin (HSA) were studied in vitro by isothermal titration calorimetry at pH 7.2 and 310 K in aqueous solution. The solvation parameters recovered from the extended solvation model indicate that HSA is involved in the transport of copper ion. Complexes between Aβ (1–16) and copper ions have been proposed to be an aberrant interaction in the development of Alzheimer's disease, where Cu2+ is involved in Aβ (1–16) aggregation. The indexes of stability indicate that HSA removed Cu2+ from Aβ (1–16), rapidly, decreased Cu-induced aggregation of Aβ (1–16), and reduced the toxicity of Aβ (1–16) + Cu2+ significantly.
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