Abstract
The locus D7S23 includes a CpG-enriched methylation-free island that maps midway between the markers J3.11 and met and is genetically very close to the mutation causing cystic fibrosis (CF). We have studied the linkage disequilibrium between four polymorphic markers from this locus (KM.19, CS.7, XV-2c, and PT-3) and the CF mutation (CF) in 127 Italian families. Strong linkage disequilibrium is found between KM.19, CS.7, and CF, and weaker but significant disequilibrium is found between XV-2c, PT-3, and CF. The disequilibrium between markers and CF for the Italian population provides additional information on the origin and homogeneity of the CF defect. This panel of probes is sufficiently informative to permit accurate prenatal diagnosis of CF in most families with an affected person, and the disequilibrium also allows indirect carrier detection/exclusion in some cases.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Bird A. P. CpG-rich islands and the function of DNA methylation. Nature. 1986 May 15;321(6067):209–213. doi: 10.1038/321209a0. [DOI] [PubMed] [Google Scholar]
- Chakraborty R., Lidsky A. S., Daiger S. P., Güttler F., Sullivan S., Dilella A. G., Woo S. L. Polymorphic DNA haplotypes at the human phenylalanine hydroxylase locus and their relationship with phenylketonuria. Hum Genet. 1987 May;76(1):40–46. doi: 10.1007/BF00283048. [DOI] [PubMed] [Google Scholar]
- Estivill X., Farrall M., Scambler P. J., Bell G. M., Hawley K. M., Lench N. J., Bates G. P., Kruyer H. C., Frederick P. A., Stanier P. A candidate for the cystic fibrosis locus isolated by selection for methylation-free islands. 1987 Apr 30-May 6Nature. 326(6116):840–845. doi: 10.1038/326840a0. [DOI] [PubMed] [Google Scholar]
- Estivill X., Scambler P. J., Wainwright B. J., Hawley K., Frederick P., Schwartz M., Baiget M., Kere J., Williamson R., Farrall M. Patterns of polymorphism and linkage disequilibrium for cystic fibrosis. Genomics. 1987 Nov;1(3):257–263. doi: 10.1016/0888-7543(87)90052-8. [DOI] [PubMed] [Google Scholar]
- Farrall M., Estivill X., Williamson R. Indirect cystic fibrosis carrier detection. Lancet. 1987 Jul 18;2(8551):156–157. doi: 10.1016/s0140-6736(87)92354-3. [DOI] [PubMed] [Google Scholar]
- Feinberg A. P., Vogelstein B. "A technique for radiolabeling DNA restriction endonuclease fragments to high specific activity". Addendum. Anal Biochem. 1984 Feb;137(1):266–267. doi: 10.1016/0003-2697(84)90381-6. [DOI] [PubMed] [Google Scholar]
- Scambler P. J., Wainwright B. J., Watson E., Bates G., Bell G., Williamson R., Farrall M. Isolation of a further anonymous informative DNA sequence from chromosome seven closely linked to cystic fibrosis. Nucleic Acids Res. 1986 Mar 11;14(5):1951–1956. doi: 10.1093/nar/14.5.1951. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Wainwright B. J., Scambler P. J., Schmidtke J., Watson E. A., Law H. Y., Farrall M., Cooke H. J., Eiberg H., Williamson R. Localization of cystic fibrosis locus to human chromosome 7cen-q22. 1985 Nov 28-Dec 4Nature. 318(6044):384–385. doi: 10.1038/318384a0. [DOI] [PubMed] [Google Scholar]
- White R., Woodward S., Leppert M., O'Connell P., Hoff M., Herbst J., Lalouel J. M., Dean M., Vande Woude G. A closely linked genetic marker for cystic fibrosis. 1985 Nov 28-Dec 4Nature. 318(6044):382–384. doi: 10.1038/318382a0. [DOI] [PubMed] [Google Scholar]