Genetic Predisposition to Weight Loss and Regain With Lifestyle Intervention: Analyses From the Diabetes Prevention Program and the Look AHEAD Randomized Controlled Trials

George D Papandonatos, Qing Pan, Nicholas M Pajewski, Linda M Delahanty, Inga Peter, Bahar Erar, Shafqat Ahmad, Maegan Harden, Ling Chen, Pierre Fontanillas, GIANT Consortium, Lynne E Wagenknecht, Steven E Kahn, Rena R Wing, Kathleen A Jablonski, Gordon S Huggins, William C Knowler, Jose C Florez, Jeanne M McCaffery, Paul W Franks, Diabetes Prevention Program and the Look AHEAD Research Groups, George D Papandonatos, Qing Pan, Nicholas M Pajewski, Linda M Delahanty, Inga Peter, Bahar Erar, Shafqat Ahmad, Maegan Harden, Ling Chen, Pierre Fontanillas, GIANT Consortium, Lynne E Wagenknecht, Steven E Kahn, Rena R Wing, Kathleen A Jablonski, Gordon S Huggins, William C Knowler, Jose C Florez, Jeanne M McCaffery, Paul W Franks, Diabetes Prevention Program and the Look AHEAD Research Groups

Abstract

Clinically relevant weight loss is achievable through lifestyle modification, but unintentional weight regain is common. We investigated whether recently discovered genetic variants affect weight loss and/or weight regain during behavioral intervention. Participants at high-risk of type 2 diabetes (Diabetes Prevention Program [DPP]; N = 917/907 intervention/comparison) or with type 2 diabetes (Look AHEAD [Action for Health in Diabetes]; N = 2,014/1,892 intervention/comparison) were from two parallel arm (lifestyle vs. comparison) randomized controlled trials. The associations of 91 established obesity-predisposing loci with weight loss across 4 years and with weight regain across years 2-4 after a minimum of 3% weight loss were tested. Each copy of the minor G allele of MTIF3 rs1885988 was consistently associated with greater weight loss following lifestyle intervention over 4 years across the DPP and Look AHEAD. No such effect was observed across comparison arms, leading to a nominally significant single nucleotide polymorphism×treatment interaction (P = 4.3 × 10(-3)). However, this effect was not significant at a study-wise significance level (Bonferroni threshold P < 5.8 × 10(-4)). Most obesity-predisposing gene variants were not associated with weight loss or regain within the DPP and Look AHEAD trials, directly or via interactions with lifestyle.

Trial registration: ClinicalTrials.gov NCT00004992 NCT00017953.

© 2015 by the American Diabetes Association. Readers may use this article as long as the work is properly cited, the use is educational and not for profit, and the work is not altered.

Figures

Figure 1
Figure 1
Model-based estimates of MTIF3 genotype effects on weight change among 60-year-old participants following lifestyle and control intervention in the Look AHEAD (A) and the DPP (B) trials. Baseline weight chosen to be representative of males and females in each study (see Table 1). Ancestry-informative principal components set at study-specific means.

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