Abstract
Purpose
Obesity is a heterogeneous condition and distinct adiposity subtypes may differentially affect type 2 diabetes risk. We assessed relations between genetically determined subtypes of adiposity and changes in glycemic traits in a dietary intervention trial.
Methods
The four genetic subtypes of adiposity including waist–hip ratio-increase only (WHRonly+), body mass index-increase only (BMIonly+), WHR-increase and BMI-increase (BMI+WHR+), and WHR-decrease and BMI-increase (BMI+WHR−) were assessed by polygenetic scores (PGSs), calculated based on 159 single nucleotide polymorphisms related to BMI and/or WHR. We examined the associations between the four PGSs and changes in fasting glucose, insulin, β-cell function (HOMA-B) and insulin resistance (HOMA-IR) in 692 overweight participants (84% white Americans) who were randomly assigned to one of four weight-loss diets in a 2-year intervention trial.
Results
Higher BMI+WHR−PGS was associated with a greater decrease in 2-year changes in waist circumference in white participants (P = 0.002). We also found significant interactions between WHRonly+PGS and dietary protein in 2-year changes in fasting glucose and HOMA-B (P = 0.0007 and < 0.0001, respectively). When consuming an average-protein diet, participants with higher WHRonly+PGS showed less increased fasting glucose (β = − 0.46, P = 0.006) and less reduction in HOMA-B (β = 0.02, P = 0.005) compared with lower WHRonly+PGS. Conversely, eating high-protein diet was associated with less decreased HOMA-B among individuals with lower than higher WHRonly+PGS (β = − 0.02, P = 0.006).
Conclusions
Distinct genetically determined adiposity subtypes may differentially modify the effects of weight-loss diets on improving glucose metabolism in white Americans. This trial was registered at clinicaltrials.gov as NCT00072995.
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Acknowledgements
We thank all of the participants in the trial for their dedication and contribution to the research.
Funding
The work was supported by the National Heart, Lung, and Blood Institute [grant numbers HL071981, HL034594, HL126024]; the National Institute of Diabetes and Digestive and Kidney Diseases [grant numbers DK091718, DK100383, DK078616, DK115679]; the Boston Obesity Nutrition Research Center [grant number DK46200]; and United States – Israel Binational Science Foundation [grant number 2011036]. Dr. Qi was a recipient of the American Heart Association Scientist Development Award (0730094N). Yuhang Chen is a recipient of a scholarship under the China Scholarship Council to pursue her study in the United States of America (201706240060). The funders had no role in the design or conduct of the study; collection, management, analysis, or interpretation of the data; or preparation, review, or approval of the manuscript.
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The authors’ responsibilities were as follows: YC and LQ contributed to conception and design. YC performed the statistical analyses, interpretation of data and drafted the manuscript. TZ, DS, XL, HM, ZL, YH contributed to analysis and interpretation of data, and manuscript revision. XP contributed to manuscript revision. GAB, FMS and LQ contributed to conception and design, acquisition and interpretation of the data, and manuscript revision. All authors contributed to critical revisions and have read and approved the final manuscript. LQ is the guarantor of this work.
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Chen, Y., Zhou, T., Sun, D. et al. Distinct genetic subtypes of adiposity and glycemic changes in response to weight-loss diet intervention: the POUNDS Lost trial. Eur J Nutr 60, 249–258 (2021). https://doi.org/10.1007/s00394-020-02244-x
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DOI: https://doi.org/10.1007/s00394-020-02244-x