'Neighbourhood watch' model: embryonic epiblast cells assess positional information in relation to their neighbours.
'Neighbourhood watch' model: embryonic epiblast cells assess positional information in relation to their neighbours.
复制标题
“邻里守望”模型:胚胎外胚层细胞评估与其邻居相关的位置信息。
DOI:
10.1242/dev.200295
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发表时间:
2022-05-15
期刊:
影响因子:
--
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中科院分区:
文献类型:
--
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In many developing and regenerating systems, tissue pattern is established through gradients of informative morphogens, but we know little about how cells interpret these. Using experimental manipulation of early chick embryos, including misexpression of an inducer (VG1 or ACTIVIN) and an inhibitor (BMP4), we test two alternative models for their ability to explain how the site of primitive streak formation is positioned relative to the rest of the embryo. In one model, cells read morphogen concentrations cell-autonomously. In the other, cells sense changes in morphogen status relative to their neighbourhood. We find that only the latter model can account for the experimental results, including some counter-intuitive predictions. This mechanism (which we name the ‘neighbourhood watch’ model) illuminates the classic ‘French Flag Problem’ and how positional information is interpreted by a sheet of cells in a large developing system. Summary: In a large developing system, the chick embryo before gastrulation, cells may interpret gradients of positional signals relative to their neighbours to position the primitive streak, establishing bilateral symmetry.
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DOI:
10.1242/dev.081901
发表时间:
2012-11
期刊:
Development (Cambridge, England)
影响因子:
--
作者:
Bertocchini F;Stern CD
通讯作者:
Stern CD
影响因子:
9.8
作者:
Dessaud E;Ribes V;Balaskas N;Yang LL;Pierani A;Kicheva A;Novitch BG;Briscoe J;Sasai N
通讯作者:
Sasai N
影响因子:
5.4
作者:
Laloy, Eric;Vrugt, Jasper A.
通讯作者:
Vrugt, Jasper A.
影响因子:
4
作者:
Cohen, Michael;Briscoe, James;Blassberg, Robert
通讯作者:
Blassberg, Robert
影响因子:
4.4
作者:
DICKINSON, ME;KOBRIN, MS;JENKINS, NA
通讯作者:
JENKINS, NA