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- W56090422 abstract "Male infertility due to congenital aplasia of the vas deference (CBAVD) is present in almost all CF male patients. It is also found in 1-2% of infertile otherwise healthy males. Several studies have found that about 10% of males with CBAVD carry 2 CF mutations, 40% carry one mutation and 50% have no mutations. These results indicate that in some males CBAVD is caused by two mutated CF alleles. However, in cases of males with one or no identified CF mutations, the association between CBAVD and CF is unclear. We therefore performed, in addition to CF mutation analysis, an extended haplotype analysis in 7 families of CBAVD males (2 had 2 brothers with CBAVD). Our results show that in 6 of the families, the infertile males inherited different CF alleles than their fertile brothers. However, in 2 families, in which no CF mutations were as of yet identified, different results were found. In one family, 2 infertile brothers differed in their haplotypes: both inherited from their mother the same CF allele, while from their father they inherited different alleles. Furthermore, their fertile brother inherited the same CF alleles as one of his fertile brothers. In another family, 2 brothers, onemore » with CBAVD and the other fertile, inherited the same 2 CFTR alleles. These results provide genetic evidence for heterogeneity in the etiology of CBAVD. In some families the CBAVD is caused by 2 CF mutations, in others it is caused by other mechanism(s): heterozygosity for a CF mutation influenced by different threshold levels, mutations in other gene(s), or interaction between the two.« less" @default.
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- W56090422 date "1994-09-01" @default.
- W56090422 modified "2023-09-26" @default.
- W56090422 title "Genetic evidence for heterogeneity in the etiology of CBAVD: Haplotype analysis in families" @default.
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