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@ARTICLE{Dahlstroem:636039,
author = {Dahlstroem, Christian and Barezani, Johanna and Li, Jing
and Sopelniak, Kostiantyn and Muhs, Stefanie and Schneider,
Carola and Thünauer, Roland and Reimer, Rudolph and
Windhorst, Sabine},
title = {{M}echanism of {C}entrosomal {P}rotein 55 ({CEP}55)
{L}oading {I}nto {E}xosomes},
journal = {Journal of extracellular vesicles},
volume = {14},
number = {2},
issn = {2001-3078},
address = {Hoboken, NJ},
publisher = {Wiley},
reportid = {PUBDB-2025-03594},
pages = {e70046},
year = {2025},
abstract = {Up-regulation of Centrosomal Protein 55 (CEP55) in cancer
cells increases malignancy, and the protein can be
transferred via exosomes. However, the mechanism of how
CEP55 is delivered to exosomes is unknown. In this study, we
addressed this issue and analysed trafficking of EGFP-CEP55
from early to late endosomes by using high-resolution
microscopy. Our data show that endogenous as well as
EGFP-CEP55 appeared as dot-like structures in cancer cells.
However, we did not find an internalization of CEP55 into
early Rab5- and late Rab7-positive endosomes but only into
secretory late CD63-positive endosomes. In addition, an
association of the CEP55 dots with the endoplasmic reticulum
and with ALG-2-interacting protein X (Alix) dots was
detected. Moreover, mutation of the CEP55-Alix interaction
site strongly reduced the formation of CEP55 dots as well as
CEP55 localization in extracellular vesicles. In summary,
our data indicate that delivery of CEP55 into exosomes does
not occur by the canonical early-to-late endosome pathway
but by Alix-mediated recruitment to secretory late secretory
CD63 endosomes.},
cin = {CSSB-CF-ALFM},
ddc = {570},
cid = {I:(DE-H253)CSSB-CF-ALFM-20210629},
pnm = {899 - ohne Topic (POF4-899)},
pid = {G:(DE-HGF)POF4-899},
experiment = {EXP:(DE-H253)ALFM-20250101},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:39976236},
doi = {10.1002/jev2.70046},
url = {https://bib-pubdb1.desy.de/record/636039},
}