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Am J Clin Nutr. 2014 May;99(5):1126-30. doi: 10.3945/ajcn.113.082164. Epub 2014 Mar 12.

FTO genotype, dietary protein, and change in appetite: the Preventing Overweight Using Novel Dietary Strategies trial.

Author information

1
Departments of Nutrition (TH, QQ, FBH, FMS, and LQ) and Epidemiology (FBH), Harvard School of Public Health, Boston, MA; the Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (YL, FBH, and LQ); and the Pennington Biomedical Research Center of the Louisiana State University System, Baton Rouge, LA (GAB and DAW).

Abstract

BACKGROUND:

A common obesity-risk variant rs9939609 in the fat mass- and obesity-associated (FTO) gene was recently shown to affect appetite, and the gene is sensitive to the regulation of amino acids.

OBJECTIVE:

We examined the interaction between FTO genotype and protein intake on the long-term changes in appetite in a randomized controlled trial.

DESIGN:

We genotyped FTO rs9939609 in 737 overweight adults in the 2-y Preventing Overweight Using Novel Dietary Strategies trial and assessed 4 appetite-related traits including cravings, fullness, hunger, and prospective consumption.

RESULTS:

We showed that dietary protein significantly modified genetic effects on changes in food cravings and appetite scores at 6 mo after adjustment for age, sex, ethnicity, baseline body mass index, weight change, and baseline value for respective outcomes (P-interaction = 0.027 and 0.048, respectively). The A allele was associated with a greater decrease in food cravings and appetite scores in participants with high-protein-diet intake (P = 0.027 and 0.047, respectively) but not in subjects in the low-protein-diet group (P = 0.384 and 0.078, respectively). The weight regain from 6 to 24 mo attenuated gene-protein interactions. Protein intakes did not modify FTO genotype effects on other appetite measures.

CONCLUSION:

Our data suggest that individuals with the FTO rs9939609 A allele might obtain more benefits in a reduction of food cravings and appetite by choosing a hypocaloric and higher-protein weight-loss diet. This trial was registered at clinicaltrials.gov as NCT00072995.

PMID:
24622803
PMCID:
PMC3985215
DOI:
10.3945/ajcn.113.082164
[Indexed for MEDLINE]
Free PMC Article

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