ΔNp63 antagonizes p53 to regulate mesoderm induction in Xenopus laevis

被引:11
作者
Barton, Christopher E. [2 ,3 ]
Tahinci, Emilios [1 ,3 ]
Barbieri, Christopher E. [2 ,3 ]
Johnson, Kimberly N. [2 ,3 ]
Hanson, Alison J. [1 ,3 ]
Jernigan, Kristin K. [1 ,3 ]
Chen, Tony W. [1 ,3 ]
Lee, Ethan [1 ,3 ]
Pietenpol, Jennifer A. [2 ,3 ]
机构
[1] Vanderbilt Univ, Med Ctr, Dept Cell & Dev Biol, Nashville, TN 37232 USA
[2] Vanderbilt Univ, Med Ctr, Ctr Mol Toxicol, Dept Biochem, Nashville, TN 37232 USA
[3] Vanderbilt Univ, Med Ctr, Vanderbilt Ingram Canc Ctr, Nashville, TN 37232 USA
基金
美国国家卫生研究院;
关键词
Activin A; p53; p63; Mesoderm; Differentiation; EMT; Xenopus; NODAL-RELATED SIGNALS; P63; EXPRESSION; DIRECT TARGET; DNA-BINDING; IN-VIVO; HOMOLOG; ACTIVIN; GENE; DIFFERENTIATION; PROLIFERATION;
D O I
10.1016/j.ydbio.2009.02.036
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
p63, a homolog of the tumor suppressor p53, is critical for the development and maintenance of complex epithelia. The developmentally regulated p63 isoform, Delta Np63, can act as a transcriptional repressor, but the link between the transcriptional functions of p63 and its biological roles is unclear. Based on our initial finding that the mesoderm-inducing factor activin A is suppressed by Delta Np63 in human keratinocytes, we investigated the role of Delta Np63 in regulating mesoderm induction during early Xenopus laevis development. We find that down-regulation of Delta Np63 by morpholino injection in the early Xenopus embryo potentiates mesoderm formation whereas ectopic expression of Delta Np63 inhibits mesoderm formation. Furthermore, we show that mesodermal induction after down-regulation of Delta Np63 is dependent on p53. We propose that a key function for p63 in defining a squamous epithelial phenotype is to actively suppress mesodermal cell fates during early development. Collectively, we show that there is a distinct requirement for different p53 family members during the development of both mesodermal and ectodermal tissues. These findings have implications for the role of p63 and p53 in both development and tumorigenesis of human epithelia. (C) 2009 Elsevier Inc. All rights reserved.
引用
收藏
页码:130 / 139
页数:10
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