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@ARTICLE{Bhattacharya:281843,
author = {Bhattacharya, Debjani and da Silva-Buttkus, Patricia and
Nalbach, Karsten and Cheng, Lizhen and Garrett, Lillian and
Irmler, Martin and Kislinger, Georg and Werner, Georg and
Rodde, Ramona and Lengger, Christoph and Beckers, Johannes
and Zimprich, Annemarie and Hölter, Sabine M and
Gailus-Durner, Valerie and Fuchs, Helmut and Hrabe de
Angelis, Martin and Wefers, Benedikt and Wurst, Wolfgang and
Brill, Monika S and Schifferer, Martina and Lichtenthaler,
Stefan F and Behrends, Christian},
title = {{N}europathy-associated {T}ecpr2 mutation knock-in mice
reveal endolysosomal loss of function phenotypes in neurons
and microglia.},
journal = {Cell death $\&$ disease},
volume = {16},
number = {1},
issn = {2041-4889},
address = {London [u.a.]},
publisher = {Nature Publishing Group},
reportid = {DZNE-2025-01222},
pages = {775},
year = {2025},
abstract = {Mutations in the gene encoding Tectonic β-propeller
repeat-containing repeat protein 2 (TECPR2) cause hereditary
sensory and autonomic neuropathy subtype 9 (HSAN9) which is
a fatal neurodevelopmental and neurodegenerative disorder
involving the sensory and peripheral nervous system. TECPR2
is ubiquitously expressed and linked to trafficking and
sorting within the cell, however, its functional role
remains poorly defined. Moreover, molecular insights into
pathogenic mechanisms underlying HSAN9 are lacking. Here, we
report a novel mouse model which harbors a HSAN9-associated
nonsense mutation that causes loss of TECPR2 expression.
Mice show altered gait, highly region-specific axonal
dystrophy, and extensive local gliosis. The affected medulla
area prominently features swollen axons filled with
amorphous protein aggregates, glycogen granules, single and
double membrane vesicles as well as aberrant organelles
including ER and mitochondria whose proteome is distinctly
altered. Despite the locally restricted pathology the
neuronal demise is detectable in the cerebrospinal fluid and
responded to by damage-associated microglia. However, their
capacity to clear neuronal debris seems attenuated. Overall,
neuronal and microglia phenotypes point to a dysfunctional
endolysosomal system when TECPR2 is missing. This was
confirmed in TECPR2 knockout cells and linked to TECPR2's
interaction with the homotypic fusion and protein sorting
(HOPS)-tethering complex. Collectively, we uncovered a role
of TECPR2 in endolysosome maintenance which seems relevant
for healthy neurons in a particular brain region.},
keywords = {Animals / Microglia: metabolism / Microglia: pathology /
Neurons: metabolism / Neurons: pathology / Mice / Phenotype
/ Lysosomes: metabolism / Gene Knock-In Techniques /
Endosomes: metabolism / Nerve Tissue Proteins: genetics /
Nerve Tissue Proteins: metabolism / Disease Models, Animal /
Mutation: genetics / Nerve Tissue Proteins (NLM Chemicals)},
cin = {AG Lichtenthaler / AG Wurst / AG Misgeld},
ddc = {570},
cid = {I:(DE-2719)1110006 / I:(DE-2719)1140001 /
I:(DE-2719)1110000-4},
pnm = {352 - Disease Mechanisms (POF4-352) / 351 - Brain Function
(POF4-351)},
pid = {G:(DE-HGF)POF4-352 / G:(DE-HGF)POF4-351},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:41173829},
pmc = {pmc:PMC12578842},
doi = {10.1038/s41419-025-08168-w},
url = {https://pub.dzne.de/record/281843},
}