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Uez, N. ; Lickert, H. ; Kohlhase, J.* ; Hrabě de Angelis, M. ; Kühn, R. ; Wurst, W. ; Floß, T.

Sall4 isoforms act during proximal-distal and anterior-posterior axis formation in the mouse embryo.

Genesis 46, 463-477 (2008)
DOI
Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.
Reciprocal signals from embryonic and extra-embryonic tissues pattern the embryo in proximal-distal (PD) and anterior-posterior (AP) fashion. Here we have analyzed three gene trap mutations of Sall4, of which one (Sall4-1a) led to a hypomorphic and recessive phenotype, demonstrating that Sall4-1a has yet undescribed extra-embryonic and embryonic functions in regulating PD and AP axis formation. In Sall4-1a mutants the self-maintaining autoregulatory interaction between Bmp4, Nodal and Wnt, which determines the PD axis was disrupted because of defects in the extra-embryonic visceral endoderm. More severely, two distinct Sall4 gene-trap mutants (Sall4-1a,b), resembling null mutants, failed to initiate Bmp4 expression in the extra-embryonic ectoderm and Nodal in the epiblast and were therefore unable to initiate PD axis formation. Tetraploid rescue underlined the extra-embryonic nature of the Sall4-1a phenotype and revealed a further embryonic function in Wnt/beta-catenin signaling to elongate the AP axis during gastrulation. This observation was supported through genetic interaction with beta-catenin mutants, since compound heterozygous mutants recapitulated the defects of Wnt3a mutants in posterior development.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter Sall4; spalt; gene trap; axis formation; axis elongation
Sprache
Veröffentlichungsjahr 2008
HGF-Berichtsjahr 2008
ISSN (print) / ISBN 1526-954X
e-ISSN 1526-968X
Zeitschrift Genesis : The Journal of Genetics and Development
Quellenangaben Band: 46, Heft: 9, Seiten: 463-477 Artikelnummer: , Supplement: ,
Verlag Wiley
Begutachtungsstatus Peer reviewed
Institut(e) Institute of Experimental Genetics (IEG)
Institute of Developmental Genetics (IDG)
Institute of Stem Cell Research (ISF)
POF Topic(s) 30201 - Metabolic Health
30204 - Cell Programming and Repair
Forschungsfeld(er) Genetics and Epidemiology
PSP-Element(e) G-500600-003
G-500500-001
G-550100-001
DOI 10.1002/dvg.20421
Scopus ID 58049116138
Erfassungsdatum 2008-10-02
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