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- Rissanen, A, et al.
(författare)
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Acquired preference especially for dietary fat and obesity: a study of weight-discordant monozygotic twin pairs
- 2002
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Ingår i: International Journal of Obesity. ; 26, s. 973-977
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Tidskriftsartikel (refereegranskat)abstract
- Department of Psychiatry, University of Helsinki, Finland. OBJECTIVE: To determine the independent associations of dietary preference for fat with obesity without the confounding by genetic effects. DESIGN: Descriptive comparison of the responses of monozygotic twins discordant for obesity to questions concerning current and past preference for dietary fat, current overconsumption of fatty items and recalled food consumption compared to the co-twin. SETTING: The Research and Development Centre of the Social Insurance Institution, Finland. SUBJECTS: Twenty-three healthy monozygotic twin pairs who were discordant for obesity (BMI difference at least 3 kg/m(2)). MAIN OUTCOME MEASURES: Obesity status of the twin, as a function of the current and recalled dietary preferences and selected psychosocial variables. RESULTS: The obese twins reported current preference for fatty foods three times more frequently than the lean co-twin. Moreover, when comparing recalled taste for fat at the time the twins left their parental homes, both the obese and lean co-twins consistently recalled that the obese twin had greater preference for fatty foods in young adulthood, and that the lean twin had less. Psychological characteristics of lean and obese co-twins did not differ. CONCLUSION: Acquired preference for fatty foods is associated with obesity, independent of genetic background. Modification of fat preferences may be an important step in the prevention of obesity in the general population. PMID: 12080452 [PubMed - indexed for MEDLINE]
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- Saarni, SE, et al.
(författare)
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Intentional weight loss and smoking in young adults
- 2004
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Ingår i: International journal of obesity and related metabolic disorders : journal of the International Association for the Study of Obesity. - 0307-0565. ; 28:6, s. 796-802
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Tidskriftsartikel (refereegranskat)
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- Suviolahti, E, et al.
(författare)
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The SLC6A14 gene shows evidence of association with obesity
- 2003
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Ingår i: Journal of Clinical Investigation. - 0021-9738. ; 112:11, s. 1762-1772
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Tidskriftsartikel (refereegranskat)abstract
- In our previous genome-wide scan of Finnish nuclear families, obesity was linked to chromosome Xq24. Here we analyzed this 15-Mb region by genotyping 9 microsatellite markers and 36 single nucleotide polyp morphisms (SNPs) for 11 positional and functional candidate genes in an extended sample of 218 obese Finnish sibling pairs (sibpairs) (BMI > 30 kg/m(2)). Evidence of linkage emerged mainly from the obese male sibpairs, suggesting a gender-specific effect for the underlying gene. By constructing haplotypes among the obese male sibpairs, we restricted the region from 15 Mb to 4 Mb, between markers DXS8088 and DXS8067. Regional functional candidate genes were tested for association in an initial sample of 117 cases and 182 controls. Significant evidence was observed for association for an SNP in the 3'-untranslated region of the solute carrier family 6 member 14 (SLC6A14) gene (P = 0.0002) and for SNP haplotypes of the SLC6A14 gene (P = 0.0007-0.006). Furthermore, an independent replication study sample of 837 cases and 968 controls from Finland and Sweden also showed significant differences in allele frequencies between obese and non-obese individuals (P = 0.003). The SLC6A14 gene is an interesting novel candidate for obesity because it encodes an amino acid transporter, which potentially regulates tryptophan availability for serotonin synthesis and thus possibly affects appetite control.
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