Mice lacking the giant protocadherin mFAT1 exhibit renal slit junction abnormalities and a partially penetrant cyclopia and anophthalmia phenotype

Lorenza Ciani, Anjla Patel, Nicholas D. Allen, Charles Ffrench-Constant

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185 Citations (Scopus)

Abstract

While roles in adhesion and morphogenesis have been documented for classical cadherins, the nonclassical cadherins are much less well understood. Here we have examined the functions of the giant protocadherin FAT by generating a transgenic mouse lacking mFAT1. These mice exhibit perinatal lethality, most probably caused by loss of the renal glomerular slit junctions and fusion of glomerular epithelial cell processes (podocytes). In addition, some mFAT1-/- mice show defects in forebrain development (holoprosencephaly) and failure of eye development (anophthalmia). In contrast to Drosophila, where FAT acts as a tumor suppressor gene, we found no evidence for abnormalities of proliferation in two tissues (skin and central nervous system [CNS]) containing stem and precursor cell populations and in which FAT is expressed strongly. Our results confirm a necessary role for FAT1 in the modified adhesion junctions of the renal glomerular epithelial cell and reveal hitherto unsuspected roles for FAT1 in CNS development.

Original languageEnglish
Pages (from-to)3575-3582
Number of pages8
JournalMolecular and Cellular Biology
Volume23
Issue number10
DOIs
Publication statusPublished - 15 May 2003

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