• PMID: 9736775
• Gene Name: CFTR
• Condition: congenital bilateral absence of the vas deferens (CBAVD)
• Association: Results from histological analysis also suggest an involvement of the alternative transcript in the spermatogenic status of patients, leading to a decreased number of mature sperm forms in the tubule.
• Mutation: IVS8-6(T) n
• Sex: Male
• Infertility type: Male infertility
• Other associated phenotypes: congenital bilateral absence of the vas deferens (CBAVD)

Testicular CFTR splice variants in patients with congenital absence of the vas deferens

Larriba S, Bassas L, Gimenez J, Ramos MD, Segura A, Nunes V, Estivill X, Casals T.

The involvement of the five thymidine (5T) variant in intron 8 of the cystic fibrosis membrane regulator (CFTR) gene in congenital bilateral absence of the vas deferens (CBAVD) phenotype has been extensively demonstrated. This variant leads to alternative splicing of the CFTR gene which results in a wild-type transcript and one without exon 9. Little is known about expression of the CFTR gene in the testis. We analysed the level of the aberrantly spliced transcripts in testicular biopsies and correlated it with disease expression. Quantitative RT-PCR analysis in testicular biopsies from control and CBAVD patients showed a correlation between the length of the IVS8-6(T) n tract and the level of alternatively spliced transcripts. Results from histological analysis also suggest an involvement of the alternative transcript in the spermatogenic status of patients, leading to a decreased number of mature sperm forms in the tubule. FAU - Larriba, S AU - Larriba S AD - Medical and Molecular Genetics Center-IRO, Hospital Duran i Reynals, l'Hospitalet de Llobregat, 08907 Barcelona, Spain. FAU - Bassas, L AU - Bassas L FAU - Gimenez, J AU - Gimenez J FAU - Ramos, M D AU - Ramos MD FAU - Segura, A AU - Segura A FAU - Nunes, V AU - Nunes V FAU - Estivill, X AU - Estivill X