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  • Title: Familial membranous nephropathy.
    Author: Scolari F, Amoroso A, Savoldi S, Borelli I, Valzorio B, Costantino E, Bracchi M, Usberti M, Prati E, Maiorca R.
    Journal: J Nephrol; 1998; 11(1):35-9. PubMed ID: 9561483.
    Abstract:
    Numerous HLA studies suggest that genetic factors play an important role in the development of membranous nephropathy (MN). We studied seven patients with idiopathic MN, from three unrelated families of Italian ancestry. Complement phenotype analysis and restriction fragment length polymorphism (RFLP) typing of HLA class II and of the switch region genes were done in family members. In the first family, the father, one son, and one daughter had MN; another daughter had clinical glomerulonephritis. The three members with MN shared one HLA haplotype carrying DR beta 11; in the two siblings with the disease, the second HLA haplotype carried the DR beta 3.2 allele. In families 2 and 3, two brothers had MN: in family 2, they differed in at least one haplotype; in family 3, they differed in both haplotypes. Only family 3 was informative with regard to the RFLP of the switch region genes: the two siblings were identical for both Ig heavy chain haplotypes. No clinical, laboratory or morphologic features consistent with a secondary form of the disease were found. Familial clustering of MN suggests a genetically transmitted mechanism.
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