Mesoderm induction in Xenopus caused by activation of MAP kinase

Mesoderm induction in Xenopus caused by activation of MAP kinase
复制标题

MAP 激酶激活引起爪蟾中胚层诱导

DOI:
10.1038/376058a0
复制
发表时间:
1995
期刊:
影响因子:
64.8
通讯作者:
James C. Smith
James C. Smith
中科院分区:
综合性期刊1区
文献类型:
--
作者:
M. Umbhauer;C. Marshall;C. Mason;R. Old;James C. Smith

文献摘要

参考文献

被引文献

相似文献

中胚层诱导是脊椎动物发育的关键早期步骤,涉及基因表达和形态发生的变化1。在非洲爪蟾中,正常的中胚层形成取决于通过成纤维细胞生长因子(FGF)酪氨酸激酶受体的信号传导24。来自受体酪氨酸激酶的一个重要信号通路涉及p21 ras(参考文献5)。Ras以GTP依赖的方式与丝氨酸激酶c-Raf-1结合,该复合物磷酸化并激活MAPK/ERK激酶(MEK),这是一种具有双重特异性的蛋白激酶。然后MEK激活p42 mapk和(至少在哺乳动物中)p44 mapk,它们是有丝分裂原活化蛋白(MAP)激酶家族的成员6。FGF在中胚层诱导过程中激活MAP激酶79,并且显性阴性构建体的使用表明FGF诱导中胚层需要Ras和Raf 10,11。然而,这些实验并没有揭示Ras和Raf是否通过MAP激酶诱导中胚层,或者是否涉及另一种途径,如磷脂酰肌醇3-激酶级联12。在这里,我们表明,活性形式的MEK或MAP激酶的表达诱导腹侧中胚层的FGF引起的那种。非洲爪蟾MAP激酶磷酸酶的过表达阻断FGF诱导的中胚层,并导致完整胚胎中中胚层形成的特征缺陷,而抑制P13激酶和p70 S6激酶通路对FGF诱导的中胚层没有影响。FGF以剂量依赖性方式诱导不同类型的中胚层13;引人注目的是,这通过表达不同水平的活化MEK来模拟。总之,这些实验证明MAP激酶的激活对于中胚层形成是必要的和足够的。
MESODERM induction is a critical early step in vertebrate development, involving changes in gene expression and morphogenesis1. In Xenopus, normal mesoderm formation depends on signalling through the fibroblast growth factor (FGF) tyrosine kinase receptor24. One important signalling pathway from receptor tyro-sine kinases involves p21ras (ref. 5). Ras associates with the serine kinase c-Raf-1 in a GTP-dependent manner, and this complex phosphorylates and activates MAPK/ERK kinase (MEK), a protein kinase with dual specificity. MEK then activates p42mapk and (at least in mammals) p44mapk, members of the mitogen-activated protein (MAP) kinase family6. FGF activates MAP kinase during mesoderm induction79, and the use of dominant-negative constructs suggests that mesoderm induction by FGF requires both Ras and Raf10,11. However, these experiments do not reveal whether Ras and Raf do act through MAP kinase to induce mesoderm or whether another pathway, such as the phosphatidylinositol 3-kinase cascade12, is involved. Here we show that expression of active forms of MEK or of MAP kinase induces ventral mesoderm of the kind elicited by FGF. Overexpression of a Xenopus MAP kinase phosphatase blocks mesoderm induction by FGF, and causes characteristic defects in mesoderm formation in intact embryos, whereas inhibition of the P13 kinase and p70 S6 kinase pathways has no effect on mesoderm induction by FGF. FGF induces different types of mesoderm in a dose-dependent manner13; strikingly, this is mimicked by expressing different levels of activated MEK. Together, these experiments demonstrate that activation of MAP kinases is necessary and sufficient for mesoderm formation.
DOI: 10.1126/science.1313186
发表时间: 1992-01-10
期刊: SCIENCE
影响因子: 56.9
作者:
POSADA, J;COOPER, JA
通讯作者: COOPER, JA
成纤维细胞生长因子(但不是激活素)是爪蟾外植体中丝裂原激活蛋白激酶的有效激活剂。
DOI: 10.1073/pnas.91.5.1662
发表时间: 1994
影响因子: 11.1
作者:
Graves,LM;Northrop,JL;Potts,BC;Krebs,EG;Kimelman,D
通讯作者: Kimelman,D
激活素介导的中胚层诱导需要 FGF。
DOI: 10.1242/dev.120.2.453
发表时间: 1994
期刊: Development (Cambridge, England)
影响因子: --
作者:
Cornell,RA;Kimelman,D
通讯作者: Kimelman,D
DOI: 10.1016/0378-1119(89)90358-2
发表时间: 1989-04-15
期刊: GENE
影响因子: 3.5
作者:
HO, SN;HUNT, HD;PEASE, LR
通讯作者: PEASE, LR
非洲爪蟾中胚层诱导和原肠胚形成的控制:纤连蛋白和整合素的作用。
DOI: 10.1242/dev.108.2.229
发表时间: 1990
期刊: Development (Cambridge, England)
影响因子: --
作者:
Smith,JC;Symes,K;Hynes,RO;DeSimone,D
通讯作者: DeSimone,D