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  • Title: De-novo COL4A5 gene mutations in Alport's syndrome.
    Author: Massella L, Rizzoni G, De Blasis R, Barsotti P, Faraggiana T, Renieri A, Seri M, Galli L, De Marchi M.
    Journal: Nephrol Dial Transplant; 1994; 9(10):1408-11. PubMed ID: 7816253.
    Abstract:
    Before the advent of direct molecular gene analysis the diagnosis of Alport syndrome was operationally based on three of the four classical clinical criteria. Recently, mutations have been identified in the COL4A5 gene, which is involved in X-linked Alport syndrome. Here we describe two de-novo mutations in two unrelated children, a male and a female, both with early onset of the nephropathy, but with only one of the diagnostic criteria, i.e. electron-microscopy alterations. Because of the significant estimated proportion of de-novo mutations this diagnosis should be considered in children with early signs of nephropathy, even without a suggestive family history or clinical picture (ocular or audiologic abnormalities). In the future the diagnosis of Alport syndrome will probably be made on the basis of both clinical findings and molecular analysis. Now Alport syndrome is clearly underdiagnosed.
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