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Cell 1989 Sep 22;586:1075-84.
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Ectopic expression of the proto-oncogene int-1 in Xenopus embryos leads to duplication of the embryonic axis.

McMahon AP , Moon RT .

While there is convincing evidence implicating Drosophila int-1 in pattern regulation, the normal role of int-1 in vertebrate development is unclear. We have injected Xenopus eggs with mouse int-1 RNA and monitored subsequent development. Injected RNA is translated and the protein widely distributed. Embryos develop into apparently normal gastrulae, but almost all surviving neurulae have a bifurcated anterior and expanded posterior neural plate. Bifurcation of the neural plate was abolished by substitution of a single, conserved cysteine residue and was dependent on the presence of a signal peptide sequence in the int-1 protein. Histological examination indicates that underlying axial mesodermal structures were duplicated. This result suggests that ectopic int-1 expression leads to dual axis formation and points to a role for int-1 in patterning processes in vertebrate development.

PubMed ID: 2673541
Article link: Cell
Grant support: [+]

Species referenced: Xenopus laevis
Genes referenced: fubp1 myc wnt1
GO keywords: axis specification
Antibodies: Myc Ab3 Somite Ab1

Phenotypes: Xla Wt + Mmu.wnt1{del284} (Fig. 3d) [+]

Article Images: [+] show captions