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@ARTICLE{Singh:258698,
author = {Singh, Manvendra and Kondrashkina, Aleksandra M and
Widmann, Thomas J and Cortes, Jose L and Bansal, Vikas and
Wang, Jichang and Römer, Christine and Garcia-Canadas,
Marta and Garcia-Perez, Jose L and Hurst, Laurence D and
Izsvák, Zsuzsanna},
title = {{A} new human embryonic cell type associated with activity
of young transposable elements allows definition of the
inner cell mass.},
journal = {PLoS biology},
volume = {21},
number = {6},
issn = {1544-9173},
address = {Lawrence, KS},
publisher = {PLoS},
reportid = {DZNE-2023-00671},
pages = {e3002162},
year = {2023},
abstract = {There remains much that we do not understand about the
earliest stages of human development. On a gross level,
there is evidence for apoptosis, but the nature of the
affected cell types is unknown. Perhaps most importantly,
the inner cell mass (ICM), from which the foetus is derived
and hence of interest in reproductive health and
regenerative medicine, has proven hard to define. Here, we
provide a multi-method analysis of the early human embryo to
resolve these issues. Single-cell analysis (on multiple
independent datasets), supported by embryo visualisation,
uncovers a common previously uncharacterised class of cells
lacking commitment markers that segregates after embryonic
gene activation (EGA) and shortly after undergo apoptosis.
The discovery of this cell type allows us to clearly define
their viable ontogenetic sisters, these being the cells of
the ICM. While ICM is characterised by the activity of an
Old non-transposing endogenous retrovirus (HERVH) that acts
to suppress Young transposable elements, the new cell type,
by contrast, expresses transpositionally competent Young
elements and DNA-damage response genes. As the Young
elements are RetroElements and the cells are excluded from
the developmental process, we dub these REject cells. With
these and ICM being characterised by differential mobile
element activities, the human embryo may be a 'selection
arena' in which one group of cells selectively die, while
other less damaged cells persist.},
keywords = {Humans / DNA Transposable Elements: genetics / Blastocyst:
metabolism / Embryo, Mammalian / DNA Transposable Elements
(NLM Chemicals)},
cin = {AG Bansal},
ddc = {610},
cid = {I:(DE-2719)1210013},
pnm = {354 - Disease Prevention and Healthy Aging (POF4-354)},
pid = {G:(DE-HGF)POF4-354},
typ = {PUB:(DE-HGF)16},
pmc = {pmc:PMC10281584},
pubmed = {pmid:37339119},
doi = {10.1371/journal.pbio.3002162},
url = {https://pub.dzne.de/record/258698},
}