Document Detail


Genetic variation in TAS1R2 (Ile191Val) is associated with consumption of sugars in overweight and obese individuals in 2 distinct populations.
MedLine Citation:
PMID:  20943793     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Taste is an important determinant of food consumption, and genetic variations in the sweet taste receptor subunit TAS1R2 may contribute to interindividual variations in sugar consumption.
OBJECTIVE: We determined whether Ser9Cys and Ile191Val variations in TAS1R2 were associated with differences in the consumption of sugars in 2 populations.
DESIGN: Population 1 included 1037 diabetes-free young adults in whom we assessed dietary intake by using a 1-mo, 196-item food-frequency questionnaire. Population 2 consisted of 100 individuals with type 2 diabetes with dietary intakes assessed by using 2 sets of 3-d food records administered 2 wk apart. Dietary counseling was provided between food records 1 and 2. Dietary intakes between genotypes were compared by using analysis of covariance adjusted for potential confounders.
RESULTS: In population 1, a significant Ile191Val × body mass index (BMI; in kg/m²) interaction was detected for the consumption of sugars, and the effect of genotype was significant only in individuals with a BMI ≥ 25 (n = 205). In comparison with individuals homozygous for the Ile allele, Val carriers consumed fewer sugars (122 ± 6 compared with 103 ± 6 g sugar/d, respectively; P = 0.01). Regression estimates that associated BMI with total sugar consumption by Ile/Ile and Val-carrier genotype intersected at a BMI of 23.5. In population 2, Val carriers also consumed less sugar than did individuals with the Ile/Ile genotype (99 ± 6 compared with 83 ± 6 g sugar/d, respectively; P = 0.04) on food record 2, and sugar was the only macronutrient that decreased significantly (-9 ± 4 g sugar/d, P = 0.02) in Val carriers who received dietary counseling.
CONCLUSION: Our findings show that a genetic variation in TAS1R2 affects habitual consumption of sugars and may contribute to interindividual differences in changing behaviors in response to dietary counseling.
Authors:
Karen M Eny; Thomas Ms Wolever; Paul N Corey; Ahmed El-Sohemy
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-10-13
Journal Detail:
Title:  The American journal of clinical nutrition     Volume:  92     ISSN:  1938-3207     ISO Abbreviation:  Am. J. Clin. Nutr.     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2010-11-24     Completed Date:  2010-12-23     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0376027     Medline TA:  Am J Clin Nutr     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1501-10     Citation Subset:  AIM; IM    
Affiliation:
Department of Nutritional Sciences and the Dalla Lana School of Public Health, University of Toronto, Toronto, Canada.
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MeSH Terms
Descriptor/Qualifier:
Alleles
Amino Acids / genetics
Analysis of Variance
Body Mass Index
Diabetes Mellitus, Type 2 / genetics*
Diet Records
Dietary Sucrose / administration & dosage*
Female
Food Habits*
Genotype
Homozygote
Humans
Male
Obesity / genetics*
Overweight / genetics*
Patient Education as Topic
Polymorphism, Genetic*
Questionnaires
Receptors, G-Protein-Coupled / genetics*
Reference Values
Regression Analysis
Young Adult
Chemical
Reg. No./Substance:
0/Amino Acids; 0/Dietary Sucrose; 0/Receptors, G-Protein-Coupled; 0/taste receptors, type 1

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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