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Myosin-II-mediated cell shape changes and cell intercalation contribute to primitive streak formation. 2015

Emil Rozbicki, and Manli Chuai, and Antti I Karjalainen, and Feifei Song, and Helen M Sang, and René Martin, and Hans-Joachim Knölker, and Michael P MacDonald, and Cornelis J Weijer
Division of Cell and Developmental Biology, College of Life Sciences, University of Dundee, Dundee, DD1 5EH, Scotland, UK.

Primitive streak formation in the chick embryo involves large-scale highly coordinated flows of more than 100,000 cells in the epiblast. These large-scale tissue flows and deformations can be correlated with specific anisotropic cell behaviours in the forming mesendoderm through a combination of light-sheet microscopy and computational analysis. Relevant behaviours include apical contraction, elongation along the apical-basal axis followed by ingression, and asynchronous directional cell intercalation of small groups of mesendoderm cells. Cell intercalation is associated with sequential, directional contraction of apical junctions, the onset, localization and direction of which correlate strongly with the appearance of active myosin II cables in aligned apical junctions in neighbouring cells. Use of class specific myosin inhibitors and gene-specific knockdown shows that apical contraction and intercalation are myosin II dependent and also reveal critical roles for myosin I and myosin V family members in the assembly of junctional myosin II cables.

UI MeSH Term Description Entries
D010766 Phosphorylation The introduction of a phosphoryl group into a compound through the formation of an ester bond between the compound and a phosphorus moiety. Phosphorylations
D011758 Pyrroles Azoles of one NITROGEN and two double bonds that have aromatic chemical properties. Pyrrole
D002460 Cell Line Established cell cultures that have the potential to propagate indefinitely. Cell Lines,Line, Cell,Lines, Cell
D002465 Cell Movement The movement of cells from one location to another. Distinguish from CYTOKINESIS which is the process of dividing the CYTOPLASM of a cell. Cell Migration,Locomotion, Cell,Migration, Cell,Motility, Cell,Movement, Cell,Cell Locomotion,Cell Motility,Cell Movements,Movements, Cell
D002642 Chick Embryo The developmental entity of a fertilized chicken egg (ZYGOTE). The developmental process begins about 24 h before the egg is laid at the BLASTODISC, a small whitish spot on the surface of the EGG YOLK. After 21 days of incubation, the embryo is fully developed before hatching. Embryo, Chick,Chick Embryos,Embryos, Chick
D002645 Chickens Common name for the species Gallus gallus, the domestic fowl, in the family Phasianidae, order GALLIFORMES. It is descended from the red jungle fowl of SOUTHEAST ASIA. Gallus gallus,Gallus domesticus,Gallus gallus domesticus,Chicken
D006576 Heterocyclic Compounds, 4 or More Rings A class of heterocyclic compounds that include four or more fused rings. Both aromatic or non-aromatic ring structures are included in this category. Heterocyclic Compounds with 4 or More Rings,Five Ring Heterocyclic Compounds,Four Ring Heterocyclic Compounds,Fused Heterocyclic Compounds, Five-Ring,Fused Heterocyclic Compounds, Four-Ring,Heterocyclic Compounds with Four or More Rings,Heterocyclic Compounds, 4-Ring,Heterocyclic Compounds, 5-Ring,Heterocyclic Cpds, 4 Ring,Heterocyclic Cpds, 4 or More Rings,Heterocyclic Cpds, 5 Ring,4-Ring Heterocyclic Compounds,5-Ring Heterocyclic Compounds,Fused Heterocyclic Compounds, Five Ring,Fused Heterocyclic Compounds, Four Ring,Heterocyclic Compounds, 4 Ring,Heterocyclic Compounds, 5 Ring
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D006843 Hydrocarbons, Chlorinated Hydrocarbon compounds with one or more of the hydrogens replaced by CHLORINE. Chlorinated Hydrocarbon,Chlorinated Hydrocarbons,Organochlorine Compound,Chlorine Compounds, Organic,Organochlorine Compounds,Compound, Organochlorine,Compounds, Organic Chlorine,Compounds, Organochlorine,Hydrocarbon, Chlorinated,Organic Chlorine Compounds
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia

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