期刊
JOURNAL OF INORGANIC BIOCHEMISTRY
卷 102, 期 2, 页码 371-375出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jinorgbio.2007.09.010
关键词
type-2 diabetes mellitus; amylin; islet amyloid polypeptide; copper; iron; zinc; aluminium; ThT fluorescence; TEM
The amyloidogenic peptide amylin is found associated with pancreatic islet beta-cells and is implicated in the aetiology of type-2 diabetes mellitus. We have used fluorimetry and transmission electron microscopy to investigate in vitro the influence of AI(III), Fe(III), Zn(II) and Cu(II) on amylin amyloid formation under near-physiological conditions. Cu(II) at 10.0 mu M inhibited amylin of 0.4 and 2.0 mu M from forming amyloid fibrils while the same concentration of either Al(III) or Zn(II) promoted the formation of beta-pleated sheet structures. If amylin amyloid is cytotoxic to beta-cells then Cu(II) should protect against the degeneration of the islets in type-2 diabetes mellitus. (c) 2007 Elsevier Inc. All rights reserved.
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