Channel formation in planar lipid bilayers by a neurotoxic fragment of the beta-amyloid peptide.

Abstract:

:Alzheimer's disease (AD) pathology is characterized by plaques, tangles, and neuronal cell loss. The main constituent of plaques is beta-amyloid peptide (A beta), a 39-42 residue peptide which has been linked to disruption of calcium homeostasis and neurotoxicity in vitro. We demonstrate that a neurotoxic fragment of A beta, A beta (25-35) spontaneously inserted into planar lipid membranes to form weakly selective, voltage dependent, ion-permeable channels. We suggest that channel formation may be involved in the pathogenesis of AD and that A beta (25-35) may be the active channel forming segment.

authors

Mirzabekov T,Lin MC,Yuan WL,Marshall PJ,Carman M,Tomaselli K,Lieberburg I,Kagan BL

doi

10.1006/bbrc.1994.2047

subject

Has Abstract

pub_date

1994-07-29 00:00:00

pages

1142-8

issue

2

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(84)72047-X

journal_volume

202

pub_type

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