Rho-associated protein kinase regulates subcellular localisation of Angiomotin and Hippo-signalling during preimplantation mouse embryo development
Language English Country Netherlands Media print-electronic
Document type Journal Article
PubMed
27430121
DOI
10.1016/j.rbmo.2016.06.028
PII: S1472-6483(16)30404-7
Knihovny.cz E-resources
- Keywords
- Angiomotin, Hippo-signalling, Rho-associated protein kinase (Rock), polarization, preimplantation stage embryo,
- MeSH
- Angiomotins MeSH
- Blastocyst metabolism MeSH
- Embryonic Development * MeSH
- rho-Associated Kinases genetics metabolism physiology MeSH
- Intercellular Signaling Peptides and Proteins analysis metabolism MeSH
- Microfilament Proteins analysis metabolism MeSH
- Mice MeSH
- Protein Serine-Threonine Kinases metabolism MeSH
- Hippo Signaling Pathway MeSH
- Signal Transduction MeSH
- Animals MeSH
- Check Tag
- Mice MeSH
- Animals MeSH
- Publication type
- Journal Article MeSH
- Names of Substances
- Amot protein, mouse MeSH Browser
- Angiomotins MeSH
- rho-Associated Kinases MeSH
- Intercellular Signaling Peptides and Proteins MeSH
- Microfilament Proteins MeSH
- Protein Serine-Threonine Kinases MeSH
The differential activity of the Hippo-signalling pathway between the outer- and inner-cell populations of the developing preimplantation mouse embryo directs appropriate formation of trophectoderm and inner cell mass (ICM) lineages. Such distinct signalling activity is under control of intracellular polarization, whereby Hippo-signalling is either supressed in polarized outer cells or activated in apolar inner cells. The central role of apical-basolateral polarization to such differential Hippo-signalling regulation prompted us to reinvestigate the role of potential upstream molecular regulators affecting apical-basolateral polarity. This study reports that the chemical inhibition of Rho-associated kinase (Rock) is associated with failure to form morphologically distinct blastocysts, indicative of compromised trophectoderm differentiation, and defects in the localization of both apical and basolateral polarity factors associated with malformation of tight junctions. Moreover, Rock-inhibition mediates mislocalization of the Hippo-signalling activator Angiomotin (Amot), to the basolateral regions of outer cells and is concomitant with aberrant activation of the pathway. The Rock-inhibition phenotype is mediated by Amot, as RNAi-based Amot knockdown totally rescues the normal suppression of Hippo-signalling in outer cells. In conclusion, Rock, via regulating appropriate apical-basolateral polarization in outer cells, regulates the appropriate activity of the Hippo-signalling pathway, by ensuring correct subcellular localization of Amot protein in outer cells.
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