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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Molecular characterization of three novel Fanconi anemia mutations in Israeli Arabs.

OBJECTIVES: In a previous study, we investigated the molecular basis of Fanconi anemia (FA) in 13 unrelated Israeli Jewish FA patients and identified four ethnicity specific mutations. In the present study we extended our study to Israeli Arab patients. METHODS: We studied three consanguineous families with nine FA patients and an additional unrelated patient. DNA single-strand conformation polymorphism of each exon of the FANCA and FANCG genes was followed by sequence analysis of the aberrantly migrating fragments and by reverse transcriptase-polymerase chain reaction (RT-PCR) analysis of the splice-site mutations identified. RESULTS: Three unique disease-causing mutations were identified: (i) FANCA gross deletion of exons 6-31; (ii) FANCA splice-site mutation IVS 42-2A>C; (iii) FANCG splice-site mutation IVS4+3A>G. Sequence analysis of the FANCA gross deletion revealed recombination between two highly homologous Alu elements. cDNA analysis of the two splice mutations suggested intron 42 retention in FANCA IVS 42-2A>C and exon 4 skipping in FANCG IVS4+3A>G. The clinical condition of eight patients with FANCA mutations was severe. CONCLUSIONS: Two unique FANCA mutations and one FANCG mutation were identified in Israeli Arab FA patients. Deletion of FANCA exon 6-31 as in previously described gross deletions was within introns rich in Alu repeats. To the best of our knowledge, the FANCA IVS 42-2A>C mutation is the first in this gene to result in intron retention. Further analysis of FA mutations will enable prenatal diagnosis and a rational therapeutic approach including frequent monitoring and early bone marrow transplantation.[1]


  1. Molecular characterization of three novel Fanconi anemia mutations in Israeli Arabs. Tamary, H., Dgany, O., Toledano, H., Shalev, Z., Krasnov, T., Shalmon, L., Schechter, T., Bercovich, D., Attias, D., Laor, R., Koren, A., Yaniv, I. Eur. J. Haematol. (2004) [Pubmed]
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