CFTR haplotype analysis reveals genetic heterogeneity in the etiology of congenital bilateral aplasia of the vas deferens.

Abstract:

:Congenital bilateral aplasia of the vas deferens (CBAVD) was suggested to be a mild form of cystic fibrosis (CF). Mutation analysis of the cystic fibrosis transmembrane conductance regulator (CFTR) gene in males with CBAVD revealed that in some males CBAVD is caused by two defective CFTR alleles. The genetic basis of CBAVD in the other males and its association with CF remained unclear. We undertook this study to test the hypothesis of commonality of CBAVD and CF by haplotype analysis, in the CFTR locus, of males suffering from CBAVD and of their families. According to the hypothesis of commonality of CBAVD and CF, two brothers with CBAVD are expected to carry the same two CFTR alleles, while their fertile brothers are expected to carry at least one different allele. Eleven families were studied, of which two families, with unidentified CFTR mutations, did not support this hypothesis. In these families two brothers with CBAVD inherited different CFTR alleles. Their fertile brothers inherited the same CFTR alleles as their brothers with CBAVD. These results provide evidence for genetic heterogeneity in CBAVD. Though in some families CBAVD is associated with two CFTR mutations, we suggest that in others it is caused by other mechanisms, such as mutations at other loci or homozygosity or heterozygosity for partially penetrant CFTR mutations.

journal_name

Am J Hum Genet

authors

Rave-Harel N,Madgar I,Goshen R,Nissim-Rafinia M,Ziadni A,Rahat A,Chiba O,Kalman YM,Brautbar C,Levinson D

subject

Has Abstract,Author List Incomplete

pub_date

1995-06-01 00:00:00

pages

1359-66

issue

6

eissn

0002-9297

issn

1537-6605

journal_volume

56

pub_type

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