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@ARTICLE{Jaeger:129366,
author = {Jaeger, Alexandra and Baake, Jana and Weiss, Dieter G and
Kriehuber, Ralf},
title = {{G}lycogen synthase kinase-3beta regulates
differentiation-induced apoptosis of human neural progenitor
cells.},
journal = {International journal of developmental neuroscience},
volume = {31},
number = {1},
issn = {0736-5748},
address = {Oxford [u.a.]},
publisher = {Pergamon Press},
reportid = {FZJ-2013-00882},
pages = {61 - 68},
year = {2013},
abstract = {Glycogen synthase kinase-3beta is a multifunctional key
regulator enzyme in neural developmental processes and a
main component of the canonical Wnt signaling pathway. It is
already known that the Wnt-driven differentiation of neural
progenitor cells is accompanied by an increase of apoptosis
at which the pro-apoptotic function of GSK-3beta is still
discussed. The aim of the present study was to investigate
whether the phosphorylation level of GSK-3beta at serine 9
is the primary regulatory mechanism of
differentiation-induced apoptosis. Differentiating human
neural ReNcell VM progenitor cells were treated with the
specific GSK-3beta inhibitor SB216763 (10μM) and analyzed
in respect to the intrinsic apoptosis pathway regulation
using microscopy and protein expression analysis.
Differentiation of ReNcell VM cells was accompanied by cell
morphological changes, cytoskeleton rearrangement and
apoptosis increase. Treatment of differentiating cells with
SB216763 induced a significant dephosphorylation of
GSK-3beta at serine 9 accompanied by a significant decrease
of apoptosis of about $0.7±0.03\%$ and reduced activation
of caspase-3 as well as BAX and PARP cleavage during the
first 12h of differentiation compared to untreated,
differentiating cells. Dephosphorylation of GSK-3beta at
serine 9 appears not solely to be responsible for its
pro-apoptotic function, because we observed a decrease of
intrinsic apoptosis after treatment of the cells with the
specific GSK-3beta inhibitor SB216763. We assume that
GSK-3beta drives neural progenitor cell apoptosis by direct
interaction with pro-apoptotic BAX or by indirect influence
on the canonical Wnt/beta-catenin target gene
transcription.},
cin = {S-US},
ddc = {610},
cid = {I:(DE-Juel1)S-US-20090406},
pnm = {899 - ohne Topic (POF2-899)},
pid = {G:(DE-HGF)POF2-899},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:23085082},
UT = {WOS:000313997300009},
doi = {10.1016/j.ijdevneu.2012.10.005},
url = {https://juser.fz-juelich.de/record/129366},
}