Cell junctions during the early development of the sea urchin embryo (Paracentrotus lividus)

1987 ◽  
Vol 20 (2-3) ◽  
pp. 137-146 ◽  
Author(s):  
P. Andreuccetti ◽  
M.R. Barone Lumaga ◽  
G. Cafiero ◽  
S. Filosa ◽  
E. Parisi
Keyword(s):  
Early Development ◽  
Sea Urchin ◽  
Paracentrotus Lividus ◽  
Cell Junctions ◽  
Sea Urchin Embryo

The pattern of cell division in the early development of the sea urchin, Paracentrotus lividus

1978 ◽  
Vol 65 (1) ◽  
pp. 38-49 ◽  
Author(s):  
Elio Parisi ◽  
Silvana Filosa ◽  
Benita De Petrocellis ◽  
Alberto Monroy
Keyword(s):  
Cell Division ◽  
Early Development ◽  
Sea Urchin ◽  
Paracentrotus Lividus

Effects of seawater acidification on early development of the intertidal sea urchin Paracentrotus lividus (Lamarck 1816)

2011 ◽  
Vol 62 (1) ◽  
pp. 48-54 ◽  
Author(s):  
Laure Moulin ◽  
Ana Isabel Catarino ◽  
Thomas Claessens ◽  
Philippe Dubois
Keyword(s):  
Early Development ◽  
Sea Urchin ◽  
Paracentrotus Lividus ◽  
Seawater Acidification

scholarly journals Early asymmetric cues triggering the dorsal/ventral gene regulatory network of the sea urchin embryo

eLife ◽  
2014 ◽  
Vol 3 ◽  
Author(s):  
Vincenzo Cavalieri ◽  
Giovanni Spinelli
Keyword(s):  
Gene Regulatory Network ◽  
Sea Urchin ◽  
Regulatory Network ◽  
Ectopic Expression ◽  
Paracentrotus Lividus ◽  
Loss Of Function ◽  
Mapk Activity ◽  
Sea Urchin Embryo ◽  
Gene Regulatory ◽  
Dorsal Cells

Dorsal/ventral (DV) patterning of the sea urchin embryo relies on a ventrally-localized organizer expressing Nodal, a pivotal regulator of the DV gene regulatory network. However, the inceptive mechanisms imposing the symmetry-breaking are incompletely understood. In Paracentrotus lividus, the Hbox12 homeodomain-containing repressor is expressed by prospective dorsal cells, spatially facing and preceding the onset of nodal transcription. We report that Hbox12 misexpression provokes DV abnormalities, attenuating nodal and nodal-dependent transcription. Reciprocally, impairing hbox12 function disrupts DV polarity by allowing ectopic expression of nodal. Clonal loss-of-function, inflicted by blastomere transplantation or gene-transfer assays, highlights that DV polarization requires Hbox12 action in dorsal cells. Remarkably, the localized knock-down of nodal restores DV polarity of embryos lacking hbox12 function. Finally, we show that hbox12 is a dorsal-specific negative modulator of the p38-MAPK activity, which is required for nodal expression. Altogether, our results suggest that Hbox12 function is essential for proper positioning of the DV organizer.

Sperm exposure to carbon-based nanomaterials causes abnormalities in early development of purple sea urchin (Paracentrotus lividus)

2015 ◽  
Vol 163 ◽  
pp. 158-166 ◽  
Author(s):  
Tina Mesarič ◽  
Kristina Sepčić ◽  
Damjana Drobne ◽  
Darko Makovec ◽  
Marco Faimali ◽  
...  
Keyword(s):  
Early Development ◽  
Sea Urchin ◽  
Paracentrotus Lividus ◽  
Purple Sea Urchin ◽  
Carbon Based Nanomaterials ◽  
Carbon Based
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