Neurons and plaques of Alzheimer's disease patients highly express the neuronal membrane docking protein p42IP4/centaurin alpha.

Abstract:

:The protein p42(IP4) (also called centaurin alpha), identified as a brain-specific InsP4/PtdInsP3 (PIP3)-binding protein, has been shown to be localized in human brain, specifically expressed in neurons. Several casein kinases have been found to be involved in Alzheimer's disease (AD) pathology. Since casein kinase I was reported to possess a binding domain for p42(IP4), we here investigated the expression and localization of p42(IP4) in AD brains. In cortical neurons of AD brains intracellular immunostaining for p42(IP4) exceeded the level seen in these neurons of normal brain. Statistically, significantly more p42(IP4)-immunoreactive neurons were found in temporal and angular cortex of AD patients as compared to control brain. Mostly impressively, neuritic plaques displayed a very prominent signal. Thus, we suggest that the up-regulated p42(IP4) in AD neurons may serve as a docking protein to recruit signaling molecules such as different subtypes of casein kinase I to the plasma membrane. This is the first indication for a functional interaction of these protein in possible neuronal damage. Therefore proteins such as p42(IP4), central players in signaling, may be appropriate targets for preventing neurodegenerative processes.

journal_name

Neuroreport

journal_title

Neuroreport

authors

Reiser G,Bernstein HG

doi

10.1097/00001756-200212200-00008

subject

Has Abstract

pub_date

2002-12-20 00:00:00

pages

2417-9

issue

18

eissn

0959-4965

issn

1473-558X

journal_volume

13

pub_type

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