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2016 ; 7
(ä): 13391
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Vital staining for cell death identifies Atg9a-dependent necrosis in
developmental bone formation in mouse
#MMPMID27811852
Imagawa Y
; Saitoh T
; Tsujimoto Y
Nat Commun
2016[Nov]; 7
(ä): 13391
PMID27811852
show ga
Programmed cell death has a crucial role in various biological events, including
developmental morphogenesis. Recent evidence indicates that necrosis contributes
to programmed cell death in addition to apoptosis, but it is unclear whether
necrosis acts as a compensatory mechanism for failure of apoptosis or has an
intrinsic role during development. In contrast to apoptosis, there have been no
techniques for imaging physiological necrosis in vivo. Here we employ vital
staining using propidium iodide to identify cells with plasma membrane disruption
(necrotic cells) in mouse embryos. We discover a form of necrosis at the bone
surface, which does not occur in embryos with deficiency of the autophagy-related
gene Atg9a, although it is unaffected by Atg5 knockout. We also find
abnormalities of the bone surface in Atg9a knockout mice, suggesting an important
role of Atg9a-dependent necrosis in bone surface formation. These findings
suggest that necrosis has an active role in developmental morphogenesis.
|Animals
[MESH]
|Autophagy-Related Protein 5/genetics/metabolism
[MESH]