生物
中胚层
斑马鱼
爪蟾
细胞生物学
脊椎动物
节的
细胞命运测定
胚胎
FGF与中胚层形成
解剖
原肠化
胚胎干细胞
胚胎发生
遗传学
转录因子
基因
作者
Edward M. De Robertis,Juan Larraı́n,Michael Oelgeschläger,Oliver Wessely
摘要
Molecular studies have begun to unravel the sequential cell-cell signalling events that establish the dorsal-ventral, or 'back-to-belly', axis of vertebrate animals. In Xenopus and zebrafish, these events start with the movement of membrane vesicles associated with dorsal determinants. This mediates the induction of mesoderm by generating gradients of growth factors. Dorsal mesoderm then becomes a signalling centre, the Spemann's organizer, which secretes several antagonists of growth-factor signalling. Recent studies have led to new models for the regulation of cell-cell signalling during development, which may also apply to the homeostasis of adult tissues.
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