PMID- 16354681 OWN - NLM STAT- MEDLINE DCOM- 20060329 LR - 20211203 IS - 0270-7306 (Print) IS - 1098-5549 (Electronic) IS - 0270-7306 (Linking) VI - 26 IP - 1 DP - 2006 Jan TI - Defects in yolk sac vasculogenesis, chorioallantoic fusion, and embryonic axis elongation in mice with targeted disruption of Yap65. PG - 77-87 AB - YAP is a multifunctional adapter protein and transcriptional coactivator with several binding partners well described in vitro and in cell culture. To explore in vivo requirements for YAP, we generated mice carrying a targeted disruption of the Yap gene. Homozygosity for the Yap(tm1Smil) allele (Yap-/-) caused developmental arrest around E8.5. Phenotypic characterization revealed a requirement for YAP in yolk sac vasculogenesis. Yolk sac endothelial and erythrocyte precursors were specified as shown by histology, PECAM1 immunostaining, and alpha globin expression. Nonetheless, development of an organized yolk sac vascular plexus failed in Yap-/- embryos. In striking contrast, vasculogenesis proceeded in both the allantois and the embryo proper. Mutant embryos showed patterned gene expression domains along the anteroposterior neuraxis, midline, and streak/tailbud. Despite this evidence of proper patterning and tissue specification, Yap-/- embryos showed developmental perturbations that included a notably shortened body axis, convoluted anterior neuroepithelium, caudal dysgenesis, and failure of chorioallantoic fusion. These results reveal a vital requirement for YAP in the developmental processes of yolk sac vasculogenesis, chorioallantoic attachment, and embryonic axis elongation. FAU - Morin-Kensicki, Elizabeth M AU - Morin-Kensicki EM AD - Department of Cell and Developmental Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7090, USA. emkunc@med.unc.edu FAU - Boone, Brian N AU - Boone BN FAU - Howell, Michael AU - Howell M FAU - Stonebraker, Jaclyn R AU - Stonebraker JR FAU - Teed, Jeremy AU - Teed J FAU - Alb, James G AU - Alb JG FAU - Magnuson, Terry R AU - Magnuson TR FAU - O'Neal, Wanda AU - O'Neal W FAU - Milgram, Sharon L AU - Milgram SL LA - eng GR - R01 HL063755/HL/NHLBI NIH HHS/United States GR - HL63755/HL/NHLBI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PL - United States TA - Mol Cell Biol JT - Molecular and cellular biology JID - 8109087 RN - 0 (Adaptor Proteins, Signal Transducing) RN - 0 (Cell Cycle Proteins) RN - 0 (Phosphoproteins) RN - 0 (Proteins) RN - 0 (Transcription Factors) RN - 0 (YAP-Signaling Proteins) RN - 0 (Yap1 protein, mouse) RN - EC 2.3.- (Acyltransferases) RN - EC 2.3.- (tafazzin protein, mouse) SB - IM MH - Acyltransferases MH - Adaptor Proteins, Signal Transducing/*genetics/metabolism MH - Animals MH - Cell Cycle Proteins MH - Chorioallantoic Membrane/*abnormalities/*blood supply MH - Embryo, Mammalian/abnormalities/blood supply/cytology MH - Embryonic Development/genetics MH - Gene Expression MH - Gene Targeting MH - Genes, Lethal MH - Homozygote MH - Mice MH - Mice, Mutant Strains MH - Mutation MH - Neovascularization, Physiologic/*genetics MH - Phosphoproteins/*genetics/metabolism MH - Proteins/genetics/metabolism MH - Transcription Factors/genetics/metabolism MH - YAP-Signaling Proteins MH - Yolk Sac/*abnormalities/*blood supply/cytology PMC - PMC1317614 EDAT- 2005/12/16 09:00 MHDA- 2006/03/30 09:00 PMCR- 2006/05/01 CRDT- 2005/12/16 09:00 PHST- 2005/12/16 09:00 [pubmed] PHST- 2006/03/30 09:00 [medline] PHST- 2005/12/16 09:00 [entrez] PHST- 2006/05/01 00:00 [pmc-release] AID - 26/1/77 [pii] AID - 0843-05 [pii] AID - 10.1128/MCB.26.1.77-87.2006 [doi] PST - ppublish SO - Mol Cell Biol. 2006 Jan;26(1):77-87. doi: 10.1128/MCB.26.1.77-87.2006.