Abstract:
:Atypical hemolytic uremic syndrome (aHUS) is caused by several susceptibility genes. A registry including analyses of susceptibility genes, familial occurrence and genotype-phenotype correlation should provide classification insights. Registry data of 187 unrelated index patients included age at onset, gender, family history, relapse of aHUS and potentially triggering conditions. Mutation analyses were performed in the genes CFH, CD46 and CFI and in the six potential susceptibility genes, FHR1 to FHR5 and C4BP. Germline mutations were identified in 17% of the index cases; 12% in CFH, 3% in CD46 and 2% in CFI. Twenty-nine patients had heterozygous mutations and one each had a homozygous and compound heterozygous mutation. Mutations were not found in the genes FHR1-5 and C4BP. In 40% of the patients with familial HUS a mutation was found. Penetrance by age 45 was 50% among carriers of any mutation including results of relatives of mutation-positive index cases. The only risk factor for a mutation was family history of HUS (p = 0.02). Penetrance of aHUS in carriers of mutations is not complete. Occurrence of homo- and heterozygous mutations in the same gene suggests that the number of necessary DNA variants remains unclear. Among clinical information only familial occurrence predicts a mutation.
journal_name
Ann Hum Genetjournal_title
Annals of human geneticsauthors
Sullivan M,Erlic Z,Hoffmann MM,Arbeiter K,Patzer L,Budde K,Hoppe B,Zeier M,Lhotta K,Rybicki LA,Bock A,Berisha G,Neumann HPdoi
10.1111/j.1469-1809.2009.00554.xsubject
Has Abstractpub_date
2010-01-01 00:00:00pages
17-26issue
1eissn
0003-4800issn
1469-1809pii
AHG554journal_volume
74pub_type
杂志文章abstract::Haplotype analysis is important for mapping traits. Recently, methods for estimating haplotype frequencies from genotypes of unrelated individuals based on the expectation-maximization (EM) algorithm have been developed. Our program estimates haplotype frequencies in the population and determines the posterior probabi...
journal_title:Annals of human genetics
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