Sea Urchin Development: Difference between revisions

Revision as of 12:44, 12 October 2010

Sea Urchin- activin B expression

Sea Urchin- early embryo cleavage pattern

Implication of HpEts in gene regulatory networks responsible for specification of sea urchin skeletogenic primary mesenchyme cells^[1] "The large micromeres of the 32-cell stage of sea urchin embryos are autonomously specified and differentiate into primary mesenchyme cells (PMCs), giving rise to the skeletogenic cells. We previously demonstrated that HpEts, an ets-related transcription factor, plays an essential role in the specification of PMCs in sea urchin embryos."

Dynamics of Delta/Notch signaling on endomesoderm segregation in the sea urchin embryo.^[2] "Endomesoderm is the common progenitor of endoderm and mesoderm early in the development of many animals. In the sea urchin embryo, the Delta/Notch pathway is necessary for the diversification of this tissue, as are two early transcription factors, Gcm and FoxA, which are expressed in mesoderm and endoderm, respectively. Here, we provide a detailed lineage analysis of the cleavages leading to endomesoderm segregation, and examine the expression patterns and the regulatory relationships of three known regulators of this cell fate dichotomy in the context of the lineages."

The expression and distribution of Wnt and Wnt receptor mRNAs during early sea urchin development. ^[3] "In this study, we identified all Wnt and Wnt receptor mRNAs that are present in unfertilized sea urchin eggs and early embryos and analyzed their distributions along the primary (AV) axis. Our findings indicate that the asymmetric distribution of a maternal Wnt or Wnt receptor mRNA is unlikely to be a primary determinant of the polarized stabilization of beta-catenin along the AV axis. This contrasts sharply with findings in other organisms and points to remarkable evolutionary flexibility in the molecular mechanisms that underlie this otherwise very highly conserved patterning process."

Sea Urchin-endomesoderm induction^[4]

Figure illustrates gene regulatory networks required for the early developmental process of endomesoderm induction.

Search Pubmed: Sea Urchin Development

Developmental Biology - The Early Development of Sea Urchins
4D Map of the Virtual Sea Urchin Embryo A research project aimed at creating a graphical interface that provides a spatial and temporal context in which to browse the genomic regulatory network of the sea urchin during the early stages of its embryonic development.
Sea urchin embryology lab This document was prepared for a school-teachers' workshop.

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Cite this page: Hill, M.A. (2024, April 19) Embryology Sea Urchin Development. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Sea_Urchin_Development

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+* '''Implication of HpEts in gene regulatory networks responsible for specification of sea urchin skeletogenic primary mesenchyme cells'''<ref><pubmed>20695779</pubmed></ref> "The large micromeres of the 32-cell stage of sea urchin embryos are autonomously specified and differentiate into primary mesenchyme cells (PMCs), giving rise to the skeletogenic cells. We previously demonstrated that HpEts, an ets-related transcription factor, plays an essential role in the specification of PMCs in sea urchin embryos."
 * '''Dynamics of Delta/Notch signaling on endomesoderm segregation in the sea urchin embryo.'''<ref><pubmed>20023163</pubmed></ref> "Endomesoderm is the common progenitor of endoderm and mesoderm early in the development of many animals. In the sea urchin embryo, the Delta/Notch pathway is necessary for the diversification of this tissue, as are two early transcription factors, Gcm and FoxA, which are expressed in mesoderm and endoderm, respectively. Here, we provide a detailed lineage analysis of the cleavages leading to endomesoderm segregation, and examine the expression patterns and the regulatory relationships of three known regulators of this cell fate dichotomy in the context of the lineages."