| Autor: |
Michaelovsky, Elena, Frisch, Amos, Leor, Shani, Stein, Daniel, Danziger, Yardena, Carel, Cynthia, Fennig, Silvana, Mimouni, Marc, Klauck, Sabine M., Benner, Axel, Poustka, Annemarie, Apter, Alan, Weizman, Abraham |
| Zdroj: |
American Journal of Medical Genetics. Part B, Neuropsychiatric Genetics: The Official Publication of the International Society of Psychiatric Genetics; November 2005, Vol. 139 Issue: 1 p45-50, 6p |
| Abstrakt: |
Anorexia nervosa (AN) is a severe and complex psychiatric disorder with a significant genetic contribution. Previously, we found an association between AN and the 158Val/Met polymorphism of the catechol‐O‐methyltransferase (COMT) gene in a family‐based study of 51 Israeli AN trios. In the present study, we extended the original sample to include 85 family trios [66 AN restricting (AN‐R) and 19 bingeing/purging (AN‐BP) subtype] and performed a family‐based transmission disequilibrium test (TDT) analysis for five SNPs in the COMT and two in the adjacent ARVCF gene. Association was found between AN‐R and several SNPs in the COMT‐ARVCF region including the 158Val/Met polymorphism. TDT analysis of 5‐SNP haplotypes in AN‐R trios revealed an overall statistically significant transmission disequilibrium (P < 0.001). Specifically, haplotype B [COMT‐186C‐408G‐472G(158Val)‐ARVCF‐659C(220Pro)‐524T(175Val)] was preferentially transmitted (P < 0.001) from parents of AN‐R patients to their affected daughters, while haplotype A [COMT‐186T‐408C‐472A(158Met)‐ARVCF‐659T(220Leu)‐524C(175Ala)] was preferentially (P = 0.01) not transmitted. Haplotype B was associated with increased risk (RR 3.38; 0.95CI 1.98–6.43) while haplotype A exhibited a protective effect (RR 0.40; 0.95CI 0.21–0.70) for AN‐R. Preferential transmission of the risk alleles and haplotypes from the parents was mostly contributed by the fathers. No significant transmission disequilibrium of alleles or haplotypes was found for AN‐BP trios. The risk and protective haplotypes may carry molecular variations in the COMT gene or its vicinity that are relevant to the pathophysiology of restrictive anorexia nervosa in the Israeli‐Jewish population. © 2005 Wiley‐Liss, Inc. |
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