Induction of neural cell adhesion molecule (NCAM) in Xenopus embryos.

Induction of neural cell adhesion molecule (NCAM) in Xenopus embryos.
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非洲爪蟾胚胎中神经细胞粘附分子(NCAM)的诱导。

DOI:
10.1016/0012-1606(86)90153-3
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发表时间:
1986
影响因子:
2.7
通讯作者:
Rutishauser,U
Rutishauser,U
中科院分区:
生物学3区
文献类型:
--
作者:
Jacobson,M;Rutishauser,U

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使用经典的神经诱导方案(H. Spemann和H. Mangold(1924).Roux'Arch. Entwicklungsmech. Org.123,389 -517),已经证明,通过免疫组织化学检测,NCAM在异种胚胎中的持续存在局限于实验诱导的神经系统和原代宿主神经系统。此外,在体外NCAM表达的背侧囊胚唇和动物极组织检测只有当这两个组织培养接触。这些和其他结果表明,Xenopus中容易检测到且持续的NCAM表达水平可用作神经组织的标记物和神经诱导已发生的早期阳性指标。这表明观察到的NCAM水平是诱导的结果,而不是诱导的先决条件。用体外NCAM表达来确定体内发生这种诱导所需的最短时间,发现NCAM首先在培养的动物极中检测到,所述培养的动物极在10.75或更晚时被去除。因此,在原肠胚形成的第一个2至2.5小时之前,刺激动物极组织中NCAM表达所必需和足够的诱导步骤尚未发生或可逆。
Using a classical neural induction protocol (H. Spemann and H. Mangold (1924).Roux' Arch. Entwicklungsmech. Org.123,389–517), it has been demonstrated that the sustained presence of NCAM inXenopusembryos, as detected by immunohistochemistry, was confined to the experimentally induced nervous system and the primary host nervous system. Furthermore,in vitroNCAM expression by dorsal blastopore lip and animal pole tissue was detected only when the two tissues were cultured in contact. These and other results show that readily detected and sustained levels of NCAM expression inXenopuscan be used as a marker for neural tissue and an early positive indicator that neural induction has occurred. They suggest that the observed levels of NCAM are a consequence of and not a prerequisite for induction. Using NCAM expressionin vitroto determine the minimum time necessary for this induction to occurin vivo, it was found that NCAM was first detected in cultured animal pole that had been removed at stage 10.75 or later. Thus, an inductive step necessary and sufficient for stimulation of NCAM expression in animal pole tissues had not occurred or was reversible prior to the first 2 to 2.5 hr of gastrulation.
影响因子: 11.1
作者:
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通讯作者: G. Clark
DOI: 10.1021/bi00312a011
发表时间: 1984
期刊: Biochemistry
影响因子: 2.9
作者:
Yang,H;Frey,PA
通讯作者: Frey,PA
DOI: 10.1021/bi00312a009
发表时间: 1984
期刊: Biochemistry
影响因子: 2.9
作者:
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通讯作者: Frey,PA
DOI: 10.1021/bi00312a010
发表时间: 1984
期刊: Biochemistry
影响因子: 2.9
作者:
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在扫描透射电子显微镜中可视化聚合物库甲烷标记的噬菌体。
DOI: 10.1126/science.92053
发表时间: 1979
期刊: Science
影响因子: 56.9
作者:
J. Lipka;S. Lippard;J. Wall
通讯作者: J. Wall