1. Genotypes of HLA, TCF7L2, and FTO as potential modifiers of the association between sweetened beverage consumption and risk of LADA and type 2 diabetes
- Author
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Tomas Andersson, Tiinamaija Tuomi, Lars Alfredsson, Alicja Wolk, Mozhgan Dorkhan, Leif Groop, Sofia Carlsson, Emma Ahlqvist, and Josefin E. Löfvenborg
- Subjects
Male ,0301 basic medicine ,Mediation (statistics) ,medicine.medical_specialty ,endocrine system diseases ,Genotype ,Population ,Alpha-Ketoglutarate-Dependent Dioxygenase FTO ,Medicine (miscellaneous) ,030209 endocrinology & metabolism ,Type 2 diabetes ,Body Mass Index ,Autoimmune diabetes ,BMI ,03 medical and health sciences ,Sweetened beverage ,0302 clinical medicine ,Insulin resistance ,HLA Antigens ,Internal medicine ,Diabetes mellitus ,Genetic predisposition ,Humans ,Medicine ,T2D ,education ,Sugar-Sweetened Beverages ,Sweden ,Latent autoimmune diabetes in adults ,education.field_of_study ,030109 nutrition & dietetics ,Nutrition and Dietetics ,business.industry ,Incidence ,nutritional and metabolic diseases ,Original Contribution ,Middle Aged ,medicine.disease ,Diabetes Mellitus, Type 2 ,Case-Control Studies ,Female ,medicine.symptom ,business ,Transcription Factor 7-Like 2 Protein ,TCF7L2 ,Weight gain - Abstract
Purpose Sweetened beverage consumption is associated with type 2 diabetes (T2D) and LADA. We investigated to what extent this association is mediated by BMI and whether it is modified by genotypes of HLA, TCF7L2 rs7903146, or FTO rs9939609. Methods Swedish case–control data including incident cases of LADA (n = 386) and T2D (n = 1253) with matched population-based controls (n = 1545) was used. We estimated adjusted ORs of diabetes (95% CI) in relation to sweetened beverage intake (per daily 200 mL serving) and genotypes. The impact of BMI was estimated using causal mediation methodology. Associations with HOMA-IR and HOMA-B were explored through linear regression. Results Sweetened beverage intake was associated with increased risk of LADA (OR 1.15, 95% CI 1.03–1.29) and T2D (OR 1.21, 1.11–1.32). BMI was estimated to mediate 17% (LADA) and 56% (T2D) of the total risk. LADA was associated with risk variants of HLA (3.44, 2.63–4.50) and TCF7L2 (1.27, 1.00–1.61) but not FTO. Only among non-carriers of high-risk HLA genotypes was sweetened beverage intake associated with risk of LADA (OR 1.32, 1.06–1.56) and HOMA-IR (beta = 0.162, p = 0.0047). T2D was associated with TCF7L2 and FTO but not HLA, and the risk conferred by sweetened beverages appeared modified by FTO (OR 1.45, 95% CI 1.21–1.73 in non-carriers). Conclusions Our findings suggest that sweetened beverages are associated with LADA and T2D partly through mediation by excess weight, but possibly also through other mechanisms including adverse effects on insulin sensitivity. These effects seem more pronounced in individuals without genetic susceptibility.
- Published
- 2019
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