RT Journal Article SR Electronic T1 Biallelic Inactivation of BRCA2 in Fanconi Anemia JF Science JO Science FD American Association for the Advancement of Science SP 606 OP 609 DO 10.1126/science.1073834 VO 297 IS 5581 A1 Howlett, Niall G. A1 Taniguchi, Toshiyasu A1 Olson, Susan A1 Cox, Barbara A1 Waisfisz, Quinten A1 de Die-Smulders, Christine A1 Persky, Nicole A1 Grompe, Markus A1 Joenje, Hans A1 Pals, Gerard A1 Ikeda, Hideyuki A1 Fox, Edward A. A1 D'Andrea, Alan D. YR 2002 UL http://science.sciencemag.org/content/297/5581/606.abstract AB Fanconi anemia (FA) is a rare autosomal recessive cancer susceptibility disorder characterized by cellular hypersensitivity to mitomycin C (MMC). Six FA genes have been cloned, but the gene or genes corresponding to FA subtypes B and D1 remain unidentified. Here we show that cell lines derived from FA-B and FA-D1 patients have biallelic mutations in BRCA2 and express truncated BRCA2 proteins. Functional complementation of FA-D1 fibroblasts with wild-typeBRCA2 complementary DNA restores MMC resistance. Our results link the six cloned FA genes with BRCA1 and BRCA2in a common pathway. Germ-line mutation of genes in this pathway may result in cancer risks similar to those observed in families withBRCA1 or BRCA2 mutations.