BMP2 Is Required for Cephalic Neural Tube Closure in the Mouse

被引:31
作者
Castranio, Trisha [1 ]
Mishina, Yuji [2 ]
机构
[1] Natl Inst Environm Hlth Sci, Mol Dev Biol Grp, Lab Reproduct & Dev Toxicol, NIH, Res Triangle Pk, NC 27709 USA
[2] Univ Michigan, Sch Dent, Ann Arbor, MI 48109 USA
关键词
BMP2; neural tube defects; neurulation; neural tube closure; NTD; chimera; BONE MORPHOGENETIC PROTEINS; DEVELOPING SPINAL-CORD; TGF-BETA SUPERFAMILY; EMBRYONIC-DEVELOPMENT; SONIC-HEDGEHOG; CREST CELLS; PAX-3; GENE; STEM-CELLS; DEFECTS; EXPRESSION;
D O I
10.1002/dvdy.21829
中图分类号
R602 [外科病理学、解剖学]; R32 [人体形态学];
学科分类号
100123 [人体微生态学]; 100210 [外科学];
摘要
BMPs have been shown to play a role in neural tube development particularly as dorsalizing factors. To explore the possibility that BMP2 could play a role in the developing neural tube (NT) beyond the lethality of Bmp2 null embryos, we created Bmp2 chimeras from Bmp2 null ES cells and WT blastocysts. Analysis of Bmp2 chimeras reveals NT defects at day 9.5 (E9.5). We found that exclusion of Bmp2 null ES cells from the dorsal NT did not always prevent defects. For further comparison, we used a Bmp2 mutant line in a mixed background. Phenotypes observed were similar to chimeras including open NT defects, postneurulation defects, and abnormal neural ectoderm in heterozygous and homozygous null embryos demonstrating a pattern of dose-dependent signaling. Our data exposes BMP2 as a unique player in the developing NT for dorsal patterning and identity, and normal cephalic neural tube closure in a dose-dependent manner. Developmental Dynamics 238:110-122, 2009. Published 2008 Wiley-Liss, Inc.dagger
引用
收藏
页码:110 / 122
页数:13
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