Polarisation des oeufs et des embryons : principes communs

作者: Christian Sardet , Francois Prodon , Gerard Pruliere , Janet Chenevert

DOI: 10.1051/MEDSCI/2004204414

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摘要: Le developpement d’un embryon depend de l’etablissement polarites definissant plusieurs axes embryonnaires le long desquels s’organisent les futures parties l’individu. Dans un petit nombre cas, comme chez la mouche drosophile, sont etablis avant fecondation ; dans d’autres organismes, ver nematode C. elegans, ces ne se mettent en place qu’une fois l’oeuf feconde. plupart des presente deja une polarite primaire A-V (animal-vegetatif) etablie pendant l’ovogenese et maturation meiotique qui participe a embryonnaire. Les embryons differentes especes acquierent ainsi arriere (axe antero-posterieur, A-P, tete-queue ou tete-pied), ventre dos dorso-ventral, D-V, derriere-devant, egalement appele axe aboral-oral, A-O) puis cotes droit gauche droite-gauche, D-G).

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