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FEBS Lett. 2007 Oct 2;581(24):4685-90. Epub 2007 Sep 4.

Eye-open at birth phenotype with reduced keratinocyte motility in LGR4 null mice.

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  • 1Laboratory of Molecular Biology, Graduate School of Agricultural Science, Tohoku University, 1-1 Tsutsumidori-Amamiyamachi, Aoba-ku, Sendai 981-8555, Japan.


We observed a consistent eye-open at birth (EOB) phenotype in mouse pups homozygous for a leucine-rich repeat containing G-protein coupled receptor 4 (Lgr4) allele deleting the whole transmembrane domain coding region. An in vitro wound-healing scratch assay showed notably reduced keratinocyte motility in the null mice. Phalloidin staining of F-actin in the eyelid epidermis was also reduced. We also generated keratinocyte-specific Lgr4 deficient mice, circumventing the embryonic/neonatal lethality and kidney abnormalities. Most of the conditional Lgr4 knockout mice showed the EOB phenotype. Thus, Lgr4 might be a novel gene class regulating cell motility.

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