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Hum Genet. 2011 Nov;130(5):685-99. doi: 10.1007/s00439-011-1003-z. Epub 2011 May 20.

Haplotype structure in Ashkenazi Jewish BRCA1 and BRCA2 mutation carriers.

Collaborators (217)

Stoppa-Lyonnet D, Gauthier-Villars M, Houdayer C, Moncoutier V, Belotti M, de Pauw A, Bressac-de-Paillerets B, Remenieras A, Byrde V, Caron O, Lenoir G, Bignon YJ, Uhrhammer N, Lasset C, Bonadona V, Hardouin A, Berthet P, Sobol H, Bourdon V, Noguchi T, Eisinger F, Coulet F, Colas C, Soubrier F, Coupier I, Peyrat JP, Fournier J, Révillion F, Vennin P, Adenis C, Rouleau E, Lidereau R, Demange L, Nogues C, Muller D, Fricker JP, Longy M, Sevenet N, Toulas C, Guimbaud R, Gladieff L, Feillel V, Leroux D, Dreyfus H, Rebischung C, Cassini C, Faivre L, Prieur F, Ferrer SF, Frénay M, Vénat-Bouvet L, Lynch HT, Thorne H, Niedermayr E, Pierotti M, Manoukian S, Zaffaroni D, Ripamonti CB, Radice P, Barile M, Bernard L, Karlsson P, Nordling M, Bergman A, Einbeigi Z, Stenmark-Askmalm M, Liedgren S, Borg Å, Loman N, Olsson H, Kristoffersson U, Jernström H, Harbst K, Henriksson K, Lindblom A, Arver B, von Wachenfeldt A, Liljegren A, Barbany-Bustinza G, Rantala J, Melin B, Grönberg H, Stattin EL, Emanuelsson M, Ehrencrona H, Brandell RR, Dahl N, Hogervorst FB, Verhoef S, Verheus M, van 't Veer LJ, van Leeuwen FE, Rookus MA, Collée M, van den Ouweland AM, Jager A, Hooning MJ, Tilanus-Linthorst MM, Seynaeve C, van Asperen CJ, Wijnen JT, Vreeswijk MP, Tollenaar RA, Devilee P, Ligtenberg MJ, Hoogerbrugge N, Ausems MG, van der Luijt RB, Aalfs CM, van Os TA, Gille JJ, Waisfisz Q, Meijers-Heijboer HE, Gomez-Garcia EB, van Roozendaal CE, Blok MJ, Caanen B, Oosterwijk JC, van der Hout AH, Mourits MJ, Vasen HF, Easton DF, Peock S, Cook M, Oliver CT, Frost D, Platte R, Miedzybrodzka Z, Gregory H, Morrison P, Jeffers L, Cole T, Ong KR, Hoffman J, Donaldson A, James M, Paterson J, Downing S, Taylor A, Murray A, Rogers MT, McCann E, Kennedy MJ, Barton D, Porteous M, Drummond S, Brewer C, Kivuva E, Searle A, Goodman S, Hill K, Davidson R, Murday V, Bradshaw N, Snadden L, Longmuir M, Watt C, Gibson S, Haque E, Tobias E, Duncan A, Izatt L, Jacobs C, Langman C, Whaite A, Dorkins H, Randhawa K, Barwell J, Patel N, Adlard J, Chu C, Miller J, Ellis I, Houghton C, Evans DG, Lalloo F, Taylor J, Side L, Male A, Berlin C, Eason J, Collier R, Douglas F, Claber O, Jobson I, Walker L, McLeod D, Halliday D, Durell S, Stayner B, Eeles R, Shanley S, Rahman N, Houlston R, Bancroft E, D'Mello L, Page E, Ardern-Jones A, Kohut K, Wiggins J, Castro E, Mitra A, Robertson L, Cook J, Quarrell O, Bardsley C, Hodgson S, Brice G, Winchester L, Eddy C, Tripathi V, Attard V, Eccles D, Lucassen A, Crawford G, McBride D, Smalley S.

Author information

  • 1Center for Cancer Research, Cancer Inflammation Program, Human Genetics Section, National Cancer Institute, Frederick, MD, USA.


Three founder mutations in BRCA1 and BRCA2 contribute to the risk of hereditary breast and ovarian cancer in Ashkenazi Jews (AJ). They are observed at increased frequency in the AJ compared to other BRCA mutations in Caucasian non-Jews (CNJ). Several authors have proposed that elevated allele frequencies in the surrounding genomic regions reflect adaptive or balancing selection. Such proposals predict long-range linkage disequilibrium (LD) resulting from a selective sweep, although genetic drift in a founder population may also act to create long-distance LD. To date, few studies have used the tools of statistical genomics to examine the likelihood of long-range LD at a deleterious locus in a population that faced a genetic bottleneck. We studied the genotypes of hundreds of women from a large international consortium of BRCA1 and BRCA2 mutation carriers and found that AJ women exhibited long-range haplotypes compared to CNJ women. More than 50% of the AJ chromosomes with the BRCA1 185delAG mutation share an identical 2.1 Mb haplotype and nearly 16% of AJ chromosomes carrying the BRCA2 6174delT mutation share a 1.4 Mb haplotype. Simulations based on the best inference of Ashkenazi population demography indicate that long-range haplotypes are expected in the context of a genome-wide survey. Our results are consistent with the hypothesis that a local bottleneck effect from population size constriction events could by chance have resulted in the large haplotype blocks observed at high frequency in the BRCA1 and BRCA2 regions of Ashkenazi Jews.

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