PMID: 7542570Mar 1, 1995Paper

In vivo labelling of L-type Ca2+ channels by fluorescent dihydropyridine: correlation between ontogenesis of the channels and the acquisition of neural competence in ecotderm cells from Pleurodeles waltl embryos

Cell Calcium
Catherine LeclercMarc Moreau

Abstract

The ability of the ectodermal cells to be induced and to differentiate toward neural tissue, called neural competence, is acquired shortly before gastrulation and lost during late gastrula stages in Pleurodeles waltl embryos. We have examined ectodermal cells' neural competence in relation to the evolution of the density of L-type calcium channels using the fluorescent labelled dihydropyridine probe (STBodipy-DHP). We find that the appearance of dihydropyridine sensitive calcium channels (L-type Ca2+ channels) is correlated with the acquisition of neural competence by the ectoderm cells. The highest density of these channels is reached when competence of the ectoderm is optimal. Conversely, the decrease of L-type Ca2+ channel density occurs simultaneously with the normal loss of competence. In addition, we show that these channels are functional since stimulation by S(-)-Bay K 8644 triggered an increase in [Ca2+]i revealed by fluorescence measurements using Fluo-3. This increase in [Ca2+]i is a function of the L-type Ca2+ channels' density. We propose that the molecular basis of the gain and loss of neural competence is linked to the presence of L-type Ca2+ channels in ectodermal cell membranes of Pleurodeles waltl embryos.

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Citations

Apr 12, 2005·Cell Calcium·Sarah E WebbAndrew L Miller
Oct 26, 2001·Current Biology : CB·V PalmaR Mayor
Sep 4, 1998·Development, Growth & Differentiation·H TiedemannH Tiedemann
Sep 29, 2001·Development, Growth & Differentiation·H TiedemannW Knöchel
Sep 28, 1998·The European Journal of Neuroscience·T BuddeH C Pape
Jan 26, 2011·Development, Growth & Differentiation·Kazuhiro TakanoMakoto Asashima
Dec 24, 2005·Physiological Reviews·Michael Whitaker
Dec 13, 2006·Médecine sciences : M/S·Marc MoreauCatherine Leclerc
Oct 2, 2009·Developmental Dynamics : an Official Publication of the American Association of Anatomists·Brittany B LewisMargaret S Saha
Apr 15, 2006·Developmental Dynamics : an Official Publication of the American Association of Anatomists·Alicia E NovakAngeles B Ribera
Nov 28, 2008·Developmental Dynamics : an Official Publication of the American Association of Anatomists·Weibin ZhouJohn Y Kuwada
Sep 22, 2006·Biochimica Et Biophysica Acta·Catherine LeclercMarc Moreau
Jan 13, 2009·Biochimica Et Biophysica Acta·Karen W LeeCatherine Leclerc
May 1, 1999·Development, Growth & Differentiation·C LeclercM Moreau
Jun 28, 2001·FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology·M SavignacL Pelletier
Mar 7, 2021·Biochimica Et Biophysica Acta. Molecular Cell Research·Lucette Pelletier, Marc Moreau

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