Mouse model of X-linked Alport syndrome

Michelle N Rheault, Stefan M. Kren, Beth K Thielen, Hector A. Mesa, John T Crosson, William Thomas, Yoshikazu Sado, Clifford Kashtan, Yoav Segal

Research output: Contribution to journalArticlepeer-review

89 Scopus citations

Abstract

X-linked Alport syndrome (XLAS) is a progressive disorder of basement membranes caused by mutations in the COL4A5 gene, encoding the α5 chain of type IV collagen. A mouse model of this disorder was generated by targeting a human nonsense mutation, G5X, to the mouse Col4a5 gene. As predicted for a nonsense mutation, hemizygous mutant male mice are null and heterozygous carrier female mice are mosaic for α5(IV) chain expression. Mutant male mice and carrier female mice are viable through reproductive age and fertile. Mutant male mice died spontaneously at 6 to 34 wk of age, and carrier female mice died at 8 to 45 wk of age, manifesting proteinuria, azotemia, and progressive and manifold histologic abnormalities of the kidney glomerulus and tubulointerstitium. Ultrastructural abnormalities of the glomerular basement membrane, including lamellation and splitting, were characteristic of human XLAS. The mouse model described here recapitulates essential clinical and pathologic findings of human XLAS. With α5(IV) expression reflecting X-inactivation patterns, it will be especially useful in studying determinants of disease variability in the carrier state.

Original languageEnglish (US)
Pages (from-to)1466-1474
Number of pages9
JournalJournal of the American Society of Nephrology
Volume15
Issue number6
DOIs
StatePublished - Jun 2004

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