Journal article
ΔNp63 antagonizes p53 to regulate mesoderm induction in Xenopus laevis
Developmental biology, Vol.329(1), pp.130-139
05/01/2009
DOI: 10.1016/j.ydbio.2009.02.036
PMCID: PMC2690611
PMID: 19272371
Abstract
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.
Details
- Title: Subtitle
- ΔNp63 antagonizes p53 to regulate mesoderm induction in Xenopus laevis
- Creators
- Christopher E. Barton - Vanderbilt UniversityEmilios Tahinci - Vanderbilt UniversityChristopher E. Barbieri - Vanderbilt UniversityKimberly N. Johnson - Vanderbilt UniversityAlison J. Hanson - Vanderbilt UniversityKristin K. Jernigan - Vanderbilt UniversityTony W. Chen - Vanderbilt UniversityEthan Lee - Vanderbilt UniversityJennifer A. Pietenpol - Vanderbilt University
- Resource Type
- Journal article
- Publication Details
- Developmental biology, Vol.329(1), pp.130-139
- DOI
- 10.1016/j.ydbio.2009.02.036
- PMID
- 19272371
- PMCID
- PMC2690611
- NLM abbreviation
- Dev Biol
- ISSN
- 0012-1606
- eISSN
- 1095-564X
- Publisher
- Elsevier
- Number of pages
- 10
- Grant note
- P50 CA95103 / National Cancer Institute; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Cancer Institute (NCI) CA70856; CA105436; T32CA078136-08; GM073407; CA009385; 5F30ES016504; ES00267; CA68485; 1 R01 GM081635-01 / National Institutes of Health; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA CA 20305301 / Pew Scholarship in the Biomedical Sciences RSG-05-126-01 / American Cancer Society
- Language
- English
- Date published
- 05/01/2009
- Academic Unit
- Psychiatry
- Record Identifier
- 9984823121502771
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