Richardson K.,Nutrition and Genomics Laboratory |
Louie-Gao Q.,Boston University |
Arnett D.K.,University of Alabama at Birmingham |
Parnell L.D.,Nutrition and Genomics Laboratory |
And 9 more authors.
PLoS ONE | Year: 2011
PLIN4 is a member of the PAT family of lipid storage droplet (LSD) proteins. Associations between seven single nucleotide polymorphisms (SNPs) at human PLIN4 with obesity related phenotypes were investigated using meta-analysis followed by a determination if these phenotypes are modulated by interactions between PLIN4 SNPs and dietary PUFA. Samples consisted of subjects from two populations of European ancestry. We demonstrated association of rs8887 with anthropometrics. Meta-analysis demonstrated significant interactions between the rs8887 minor allele with PUFA n3 modulating anthropometrics. rs884164 showed interaction with both n3 and n6 PUFA modulating anthropometric and lipid phenotypes. In silico analysis of the PLIN4 3′UTR sequence surrounding the rs8887 minor A allele predicted a seed site for the human microRNA-522 (miR-522), suggesting a functional mechanism. Our data showed that a PLIN4 3′UTR luciferase reporter carrying the A allele of rs8887 was reduced in response to miR-522 mimics compared to the G allele. These results suggest variation at the PLIN4 locus, and its interaction with PUFA as a modulator of obesity related phenotypes, acts in part through creation of a miR-522 regulatory site. © 2011 Richardson et al.
PubMed | Nutrition and Genomics Laboratory, Nutritional Epidemiology Laboratory and, Tufts University, Harvard University and Madrid Institutes of Advanced Research
Type: Journal Article | Journal: Advances in nutrition (Bethesda, Md.) | Year: 2015
Links between short sleep duration and obesity, type 2 diabetes, hypertension, and cardiovascular disease may be mediated through changes in dietary intake. This review provides an overview of recent epidemiologic studies on the relations between habitual short sleep duration and dietary intake in adults from 16 cross-sectional studies. The studies have observed consistent associations between short sleep duration and higher total energy intake and higher total fat intake, and limited evidence for lower fruit intake, and lower quality diets. Evidence also suggests that short sleepers may have irregular eating behavior deviating from the traditional 3 meals/d to fewer main meals and more frequent, smaller, energy-dense, and highly palatable snacks at night. Although the impact of short sleep duration on dietary intake tends to be small, if chronic, it may contribute to an increased risk of obesity and related chronic disease. Mechanisms mediating the associations between sleep duration and dietary intake are likely to be multifactorial and include differences in the appetite-related hormones leptin and ghrelin, hedonic pathways, extended hours for intake, and altered time of intake. Taking into account these epidemiologic relations and the evidence for causal relations between sleep loss and metabolism and cardiovascular function, health promotion strategies should emphasize improved sleep as an additional factor in health and weight management. Moreover, future sleep interventions in controlled studies and sleep extension trials in chronic short sleepers are imperative for establishing whether there is a causal relation between short sleep duration and changes in dietary intake.
News Article | November 10, 2016
An epidemiological analysis of data from 1,685 adult Americans finds that regular consumption of sugar-sweetened beverages, but not diet soda, is associated with increased risk of prediabetes and increased insulin resistance BOSTON (Nov. 9, 2016) -- Adult Americans who regularly consumed sugar-sweetened beverages (roughly one can of soda per day) had a 46 percent higher risk of developing prediabetes compared to low- or non-consumers over a 14-year period, according to a new epidemiological analysis led by scientists at the Jean Mayer USDA Human Nutrition Research Center on Aging (HNRCA) at Tufts University. Higher sugar-sweetened beverage intake was also associated with increased insulin resistance, a risk factor for type 2 diabetes. No associations between diet soda consumption and risk of prediabetes or increased insulin resistance were found. However, the research team notes that previous studies on associations between diet soda and risk of type 2 diabetes have produced mixed results, and further studies are needed to reveal the long-term health impact of artificially sweetened drinks. The findings were published in the Journal of Nutrition on Nov. 9. "Although our study cannot establish causality, our results suggest that high sugar-sweetened beverage intake increases the chances of developing early warning signs for type 2 diabetes. If lifestyle changes are not made, individuals with prediabetes are on the trajectory to developing diabetes," said senior study author Nicola McKeown, Ph.D., scientist in the Nutritional Epidemiology Program at the USDA HNRCA. "Our findings support recommendations to limit sugar-sweetened beverage intake, which can be achieved by replacing sugary beverages with healthier alternatives such as water or unsweetened coffee or tea," added McKeown, who is also an associate professor at the Friedman School of Nutrition Science and Policy at Tufts. "This is a simple dietary modification that could be of substantial health benefit to people who consume sugary drinks daily and who are at increased risk of diabetes." In the current study, McKeown and her colleagues analyzed longitudinal data on 1,685 middle-aged adults over a period of 14 years, obtained from the Framingham Heart Study's Offspring cohort -- a National Heart, Lung, and Blood Institute-funded program that has monitored multiple generations for lifestyle and clinical characteristics that contribute to cardiovascular disease. Selected participants did not have diabetes or prediabetes during an initial baseline examination and self-reported their long-term sugar-sweetened beverage and diet soda consumption habits through food frequency questionnaires. Sugar-sweetened beverages were defined as colas and other carbonated beverages, and non-carbonated fruit drinks such as lemonade and fruit punch. Fruit juice was not included in the sugar-sweetened beverage category. The team found those who drank the highest amounts of sugar-sweetened beverages -- a median of six 12 fluid ounce servings a week -- had a significantly greater risk of developing prediabetes compared to low- or non-consumers, after adjusting for factors such as age, sex and body mass index. The highest consumers of sugar-sweetened beverages had roughly 8 percent higher insulin resistance scores, compared to low- or non-consumers after follow-up at seven years. Even after accounting for change in weight and other aspects of diet, the relationships between sugar-sweetened beverages and these metabolic risk factors for diabetes persisted. Diet soda intake -- defined as low-calorie cola or other carbonated low-calorie beverages -- had no statistical associations with risk for either prediabetes or insulin resistance. However, previous research on the relationship between diet soda and type 2 diabetes has been mixed, and it is still unclear whether any observed associations are due to direct or indirect factors. More research is needed to determine whether there are real health risks with long-term diet soda consumption, say the study authors. In addition, the authors caution that despite adjusting for multiple factors, residual confounding cannot be ruled out due to the observational nature of the study. Participants who were analyzed in the study were mostly middle-aged and Caucasian, more likely to be women, and had lower body mass index and waist circumference, which may limit the generalizability of the findings. A significant body of research has found associations between regular consumption of sugar-sweetened beverages and increased risk of type 2 diabetes. The new findings now provide evidence of an association with the major predictor of type 2 diabetes. If diagnosed early, prediabetes is reversible through lifestyle changes such as diet and exercise. "Based on our observational study alone, we cannot be certain why we saw the relationships we did. Additional studies are needed to fully understand the health impact of sugar-sweetened beverages and diet sodas," said lead study author Jiantao Ma, Ph.D., who conducted the analysis as part of his doctoral thesis as a student in the Nutrition Epidemiology Program at the USDA HNRCA and the Friedman School. "Nevertheless, our data are consistent with many other studies and clinical trials that support the health benefits of reducing sugar intake, and we encourage the public to look for healthier options," added Ma, who is currently a postdoctoral fellow at the National Heart, Lung, and Blood Institute of the National Institutes of Health. Additional authors of this study are Paul F. Jacques, D.Sc., director and senior scientist in the Nutritional Epidemiology Laboratory at the USDA HNRCA, James B. Meigs, M.D., professor of medicine at Harvard Medical School and physician in the division of general internal medicine at Massachusetts General Hospital, Caroline S. Fox, M.D., M.P.H., of the Framingham Heart Study of the National Heart, Lung, and Blood Institute of the National Institutes of Health, Gail T. Rogers, M.A., senior statistician in the Nutritional Epidemiology Laboratory at the USDA HNRCA, Caren E. Smith, M.S., D.V.M., scientist II in the Nutrition and Genomics Laboratory at the USDA HNRCA, Adela Hruby, Ph.D., M.P.H., scientist II in the Nutritional Epidemiology Laboratory at the USDA HNRCA, and Edward Saltzman, M.D., scientist II in the Energy Metabolism Laboratory at the USDA HNRCA at Tufts University and academic dean for education at the Friedman School. The study was supported by the National Heart, Lung, and Blood Institute of the National Institutes of Health's Framingham Heart Study (award N01HC25195), Boston University School of Medicine and the United States Department of Agriculture's Agricultural Research Service. Ma et al. "Sugar-Sweetened Beverage but Not Diet Soda Consumption Is Positively Associated with Progression of Insulin Resistance and Prediabetes." J. Nutrition 2016; 146:1-7. doi:10.3945/jn.116.234047 About the Jean Mayer USDA Human Nutrition Research Center on Aging and the Friedman School of Nutrition Science and Policy For three decades, the Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University has studied the relationship between good nutrition and good health in aging populations. Tufts research scientists work with federal agencies to establish the USDA Dietary Guidelines for Americans, the Dietary Reference Intakes, and other significant public policies. The Gerald J. and Dorothy R. Friedman School of Nutrition Science and Policy at Tufts University is the only independent school of nutrition in the United States. The school's eight degree programs -- which focus on questions relating to nutrition and chronic diseases, molecular nutrition, agriculture and sustainability, food security, humanitarian assistance, public health nutrition, and food policy and economics -- are renowned for the application of scientific research to national and international policy.
Blanco-Rojo R.,University of Cordoba, Spain |
Blanco-Rojo R.,Institute Salud Carlos III |
Blanco-Rojo R.,Nutrition and Genomics Laboratory |
Delgado-Lista J.,University of Cordoba, Spain |
And 21 more authors.
American Journal of Clinical Nutrition | Year: 2016
S100 calcium-binding protein A9 (S100A9) has previously been identified as a type 2 diabetes (T2D) gene. However, this finding requires independent validation and more in-depth analyses in other populations and ancestries. Objectives: We aimed to replicate the associations between an S100A9 variant and insulin resistance and T2D and to initiate an investigation of potential interactions with the habitual diet in several independent populations. Design: We investigated the association of the S100A9 variant rs3014866 with insulin resistance and T2D risk and its interactions with diet in 3 diverse populations as follows: the CORDIOPREV (Coronary Diet Intervention with Olive Oil and Cardiovascular Prevention; n = 711), which consisted of Spanish white adults; the GOLDN (Genetics of Lipids Lowering Drugs and Diet Network; n = 818), which involved North American non-Hispanic white adults; and Hispanic adults who participated in the BPRHS (Boston Puerto Rican Health Study; n = 1155). Results: Meta-analysis indicated that T carriers presented a lower risk of T2D than CC carriers (pooled OR: 0.714; 95% CI: 0.584, 0.845; P = 0.002). In all 3 populations (CORDIOPREV, GOLDN, and BPRHS), we showed a significant interaction between the rs3014866 single nucleotide polymorphism and dietary SFA:carbohydrate ratio intake for the homeostasis model assessment of insulin resistance (HOMA-IR) (P = 0.028, P = 0.017, and P = 0.026, respectively). CC carriers had a significantly higher HOMA-IR only when SFA:carbohydrate intake was high (P = 0.045 for the CORDIOPREV, P = 0.033 for the GOLDN, and P = 0.046 for the BPRHS) but not when SFA:carbohydrate ratio intake was low. Conclusions: The minor allele (T) of the S100A9 variant rs3014866 is associated with lower T2D risk in 3 populations of different ancestries. Note that individuals with the high-risk CC genotype may be more likely to benefit from a low SFA:carbohydrate ratio intake to improve insulin resistance as evaluated with the use of the HOMA-IR. © 2016 American Society for Nutrition.