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@ARTICLE{Nagy:140903,
author = {Nagy, Vanja and Hollstein, Ronja and Pai, Tsung-Pin and
Herde, Michel K and Buphamalai, Pisanu and Moeseneder, Paul
and Lenartowicz, Ewelina and Kavirayani, Anoop and Korenke,
Georg Christoph and Kozieradzki, Ivona and Nitsch, Roberto
and Cicvaric, Ana and Monje Quiroga, Francisco J and
Deardorff, Matthew A and Bedoukian, Emma C and Li, Yun and
Yigit, Gökhan and Menche, Jörg and Perçin, E Ferda and
Wollnik, Bernd and Henneberger, Christian and Kaiser, Frank
J and Penninger, Josef M},
title = {{HACE}1 deficiency leads to structural and functional
neurodevelopmental defects.},
journal = {Neurology / Genetics},
volume = {5},
number = {3},
issn = {2376-7839},
address = {Minneapolis, Minn.},
reportid = {DZNE-2020-07225},
pages = {e330},
year = {2019},
abstract = {We aim to characterize the causality and molecular and
functional underpinnings of HACE1 deficiency in a mouse
model of a recessive neurodevelopmental syndrome called
spastic paraplegia and psychomotor retardation with or
without seizures (SPPRS).By exome sequencing, we identified
2 novel homozygous truncating mutations in HACE1 in 3
patients from 2 families, p.Q209* and p.R332*. Furthermore,
we performed detailed molecular and phenotypic analyses of
Hace1 knock-out (KO) mice and SPPRS patient fibroblasts.We
show that Hace1 KO mice display many clinical features of
SPPRS including enlarged ventricles, hypoplastic corpus
callosum, as well as locomotion and learning deficiencies.
Mechanistically, loss of HACE1 results in altered levels and
activity of the small guanosine triphosphate (GTP)ase, RAC1.
In addition, HACE1 deficiency results in reduction in
synaptic puncta number and long-term potentiation in the
hippocampus. Similarly, in SPPRS patient-derived
fibroblasts, carrying a disruptive HACE1 mutation resembling
loss of HACE1 in KO mice, we observed marked upregulation of
the total and active, GTP-bound, form of RAC1, along with an
induction of RAC1-regulated downstream pathways.Our results
provide a first animal model to dissect this complex human
disease syndrome, establishing the first causal proof that a
HACE1 deficiency results in decreased synapse number and
structural and behavioral neuropathologic features that
resemble SPPRS patients.},
cin = {U Preclinical Researchers - Bonn},
ddc = {610},
cid = {I:(DE-2719)7000005},
pnm = {342 - Disease Mechanisms and Model Systems (POF3-342)},
pid = {G:(DE-HGF)POF3-342},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:31321300},
pmc = {pmc:PMC6561753},
doi = {10.1212/NXG.0000000000000330},
url = {https://pub.dzne.de/record/140903},
}