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Am J Hum Genet ; 67(5): 1174-85, 2000 11.
Artigo em Inglês | MEDLINE | ID: mdl-11032783

RESUMO

We performed a genome scan at an average resolution of 8 cM in 719 Finnish sib pairs with type 2 diabetes. Our strongest results are for chromosome 20, where we observe a weighted maximum LOD score (MLS) of 2.15 at map position 69.5 cM from pter and secondary weighted LOD-score peaks of 2.04 at 56.5 cM and 1.99 at 17.5 cM. Our next largest MLS is for chromosome 11 (MLS = 1.75 at 84.0 cM), followed by chromosomes 2 (MLS = 0.87 at 5.5 cM), 10 (MLS = 0.77 at 75.0 cM), and 6 (MLS = 0.61 at 112.5 cM), all under an additive model. When we condition on chromosome 2 at 8.5 cM, the MLS for chromosome 20 increases to 5.50 at 69.0 cM (P=.0014). An ordered-subsets analysis based on families with high or low diabetes-related quantitative traits yielded results that support the possible existence of disease-predisposing genes on chromosomes 6 and 10. Genomewide linkage-disequilibrium analysis using microsatellite marker data revealed strong evidence of association for D22S423 (P=.00007). Further analyses are being carried out to confirm and to refine the location of these putative diabetes-predisposing genes.


Assuntos
Cromossomos Humanos/genética , Diabetes Mellitus Tipo 2/genética , Predisposição Genética para Doença/genética , Idoso , Mapeamento Cromossômico , Diabetes Mellitus Tipo 2/sangue , Jejum , Feminino , Finlândia , Genoma Humano , Humanos , Desequilíbrio de Ligação/genética , Escore Lod , Masculino , Análise por Pareamento , Repetições de Microssatélites/genética , Pessoa de Meia-Idade , Núcleo Familiar , Característica Quantitativa Herdável , Estados Unidos
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