Abstract:
:Morphological constancy is universal in developing systems. It is unclear whether precise morphogenesis stems from faithful mechanical interpretation of gene expression patterns. We investigate the formation of the cephalic furrow, an epithelial fold that is precisely positioned with a linear morphology. Fold initiation is specified by a precise genetic code with single-cell row resolution. This positional code activates and spatially confines lateral myosin contractility to induce folding. However, 20% of initiating cells are mis-specified because of fluctuating myosin intensities at the cellular level. Nevertheless, the furrow remains linearly aligned. We find that lateral myosin is planar polarized, integrating contractile membrane interfaces into supracellular "ribbons." Local reduction of mechanical coupling at the "ribbons" using optogenetics decreases furrow linearity. Furthermore, 3D vertex modeling indicates that polarized, interconnected contractility confers morphological robustness against noise. Thus, tissue-scale mechanical coupling functions as a denoising mechanism to ensure morphogenetic precision despite noisy decoding of positional information.
journal_name
Dev Celljournal_title
Developmental cellauthors
Eritano AS,Bromley CL,Bolea Albero A,Schütz L,Wen FL,Takeda M,Fukaya T,Sami MM,Shibata T,Lemke S,Wang YCdoi
10.1016/j.devcel.2020.02.012subject
Has Abstractpub_date
2020-04-20 00:00:00pages
212-228.e12issue
2eissn
1534-5807issn
1878-1551pii
S1534-5807(20)30108-8journal_volume
53pub_type
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