Soluble β-amyloid induction of Alzheimer's phenotype for human fibroblast K+ channels

René Etcheberrigaray, Etsuro Ito, Christopher S. Kim, Daniel L. Alkon

Research output: Contribution to journalArticle

173 Citations (Scopus)

Abstract

Although β-amyloid is the main constituent of neurite plaques and may play a role in the pathophysiology of Alzheimer's disease, mechanisms by which soluble β-amyloid might produce early symptoms such as memory loss before diffuse plaque deposition have not been implicated. Treatment of fibroblasts with β-amyloid (10 nM) induced the same potassium channel dysfunction previously shown to occur specifically in fibroblasts from patients with Alzheimer's disease - namely, the absence of a 113-picosiemen potassium channel. A tetraethylammonium-induced increase of intracellular concentrations of calcium, [Ca2+]i, a response that depends on functional 113-picosiemen potassium channels, was also eliminated or markedly reduced by 10 nM β-amyloid. Increased [Ca2+]i induced by high concentrations of extracellular potassium and 166-picosiemen potassium channels were unaffected by 10 nM β-amyloid. In Alzheimer's disease, then, β-amyloid might alter potassium channels and thus impair neuronal function to produce symptoms such as memory loss by a means other than plaque formation.

Original languageEnglish
Pages (from-to)276-279
Number of pages4
JournalScience
Volume264
Issue number5156
DOIs
Publication statusPublished - 1994 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • General

Fingerprint Dive into the research topics of 'Soluble β-amyloid induction of Alzheimer's phenotype for human fibroblast K<sup>+</sup> channels'. Together they form a unique fingerprint.

  • Cite this