L-type calcium channel activation controls the in vivo transduction of the neuralizing signal in the amphibian embryos
| Autor: | Marie-Thérèse Nicolas, Marc Moreau, Claude Chabret, Anne-Marie Duprat, Christiane Daguzan, Catherine Leclerc |
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| Rok vydání: | 1997 |
| Předmět: |
Pleurodeles
medicine.medical_specialty Dihydropyridines Embryology animal structures Calcium Channels L-Type chemistry.chemical_element Ectoderm Biology Calcium Nervous System Aequorin Internal medicine medicine Animals L-type calcium channel Noggin Ion Transport Voltage-dependent calcium channel Proteins Gastrula biology.organism_classification Calcium Channel Blockers Cell biology Gastrulation Endocrinology medicine.anatomical_structure chemistry embryonic structures Nimodipine Calcium Channels Carrier Proteins Neural development Signal Transduction Developmental Biology |
| Zdroj: | Mechanisms of Development. 64(1-2):105-110 |
| ISSN: | 0925-4773 |
| DOI: | 10.1016/s0925-4773(97)00054-3 |
| Popis: | We have analyzed the transduction pathways involved in the triggering of neural induction, in amphibian embryos, in vivo. Using a plasmid construction, we have targetted the bioluminescent calcium probe aequorin to the plasma membrane of ectoderm cells of the amphibian Pleurodeles waltl before gastrulation. We have demonstrated that the in vivo triggering of neural induction depends on the activation of calcium-dependent pathways and involves L-type calcium channels. Furthermore, on excised ectoderm taken at the gastrula stage, we show that noggin, a protein currently considered as one of the natural inducers, also activates L-type calcium channels. This activation represents the first necessary event to determine cells of the dorsal ectoderm toward the neural pathway. |
| Databáze: | OpenAIRE |
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