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Lawrence JM, Divers J, Isom S, Saydah S, Imperatore G, Pihoker C, Marcovina SM, Mayer-Davis EJ, Hamman RF, Dolan L, Dabelea D, Pettitt DJ, Liese AD. Trends in Prevalence of Type 1 and Type 2 Diabetes in Children and Adolescents in the US, 2001-2017. JAMA 2021; 326:717-727. [PMID: 34427600 PMCID: PMC8385600 DOI: 10.1001/jama.2021.11165] [Citation(s) in RCA: 253] [Impact Index Per Article: 84.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
IMPORTANCE Changes in the prevalence of youth-onset diabetes have previously been observed. OBJECTIVE To estimate changes in prevalence of type 1 and type 2 diabetes in youths in the US from 2001 to 2017. DESIGN, SETTING, AND PARTICIPANTS In this cross-sectional observational study, individuals younger than 20 years with physician-diagnosed diabetes were enumerated from 6 areas in the US (4 geographic areas, 1 health plan, and select American Indian reservations) for 2001, 2009, and 2017. EXPOSURES Calendar year. MAIN OUTCOMES AND MEASURES Estimated prevalence of physician-diagnosed type 1 and type 2 diabetes overall and by race and ethnicity, age, and sex. RESULTS Among youths 19 years or younger, 4958 of 3.35 million had type 1 diabetes in 2001, 6672 of 3.46 million had type 1 diabetes in 2009, and 7759 of 3.61 million had type 1 diabetes in 2017; among those aged 10 to 19 years, 588 of 1.73 million had type 2 diabetes in 2001, 814 of 1.85 million had type 2 diabetes in 2009, and 1230 of 1.85 million had type 2 diabetes in 2017. The estimated type 1 diabetes prevalence per 1000 youths for those 19 years or younger increased significantly from 1.48 (95% CI, 1.44-1.52) in 2001 to 1.93 (95% CI, 1.88-1.98) in 2009 to 2.15 (95% CI, 2.10-2.20) in 2017, an absolute increase of 0.67 per 1000 youths (95%, CI, 0.64-0.70) and a 45.1% (95% CI, 40.0%-50.4%) relative increase over 16 years. The greatest absolute increases were observed among non-Hispanic White (0.93 per 1000 youths [95% CI, 0.88-0.98]) and non-Hispanic Black (0.89 per 1000 youths [95% CI, 0.88-0.98]) youths. The estimated type 2 diabetes prevalence per 1000 youths aged 10 to 19 years increased significantly from 0.34 (95% CI, 0.31-0.37) in 2001 to 0.46 (95% CI, 0.43-0.49) in 2009 to 0.67 (95% CI, 0.63-0.70) in 2017, an absolute increase of 0.32 per 1000 youths (95% CI, 0.30-0.35) and a 95.3% (95% CI, 77.0%-115.4%) relative increase over 16 years. The greatest absolute increases were observed among non-Hispanic Black (0.85 per 1000 youths [95% CI, 0.74-0.97]) and Hispanic (0.57 per 1000 youths [95% CI, 0.51-0.64]) youths. CONCLUSIONS AND RELEVANCE In 6 areas of the US from 2001 to 2017, the estimated prevalence of diabetes among children and adolescents increased for both type 1 and type 2 diabetes.
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Affiliation(s)
- Jean M. Lawrence
- Division of Epidemiologic Research, Department of Research & Evaluation, Kaiser Permanente Southern California, Pasadena
- Division of Diabetes, Endocrinology and Metabolic Diseases, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland
| | - Jasmin Divers
- Division of Health Services Research, Department of Foundations of Medicine, New York University Langone School of Medicine, Mineola
| | - Scott Isom
- Department of Biostatistics and Data Science, Wake Forest School of Medicine, Winston-Salem, North Carolina
| | - Sharon Saydah
- Division of Diabetes Translation, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Hyattsville, Maryland
| | - Giuseppina Imperatore
- Division of Diabetes Translation, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia
| | | | - Santica M. Marcovina
- Division of Metabolism, Endocrinology and Nutrition, Department of Medicine, University of Washington, Seattle
| | | | - Richard F. Hamman
- Department of Epidemiology, Colorado School of Public Health, Anschutz Medical Campus, Aurora
| | - Lawrence Dolan
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio
| | - Dana Dabelea
- Department of Epidemiology, Colorado School of Public Health, Anschutz Medical Campus, Aurora
- Lifecourse Epidemiology of Adiposity and Diabetes (LEAD) Center, University of Colorado, Aurora
- Department of Pediatrics, University of Colorado School of Medicine, Aurora
| | | | - Angela D. Liese
- Department of Epidemiology and Biostatistics, University of South Carolina Arnold School of Public Health, Columbia
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Nagel EM, Jacobs D, Johnson KE, Foster L, Duncan K, Kharbanda EO, Gregg B, Harnack L, Fields DA, Demerath EW. Maternal Dietary Intake of Total Fat, Saturated Fat, and Added Sugar Is Associated with Infant Adiposity and Weight Status at 6 mo of Age. J Nutr 2021; 151:2353-2360. [PMID: 33982119 PMCID: PMC8435996 DOI: 10.1093/jn/nxab101] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 02/25/2021] [Accepted: 03/16/2021] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Whether current dietary guidelines are appropriate for pregnancy and lactation has not been well studied. Many women of reproductive age are not meeting recommendations for dietary components such as fat, added sugar, and fiber. OBJECTIVES To assess associations between maternal dietary components during pregnancy and lactation and infant growth and adiposity at 6 mo of age. METHODS Mother-infant dyads (n = 349) from the prospective, observational Mothers and Infants Linked for Healthy Growth study were included (100% fully breastfed for 1 mo; 75% to 6 mo). Daily intake of fat, fiber, and added sugar was obtained using the National Cancer Institute Diet History Questionnaire II during the third trimester of pregnancy and at 1 and 3 mo postpartum. Furthermore, intakes were categorized as meeting/exceeding 2015-2020 Dietary Guidelines for Americans. Multiple linear regression models adjusted for numerous potential confounders tested relations between dietary components and infant adiposity (via DXA) and growth parameters. Regression coefficients (β) for continuous variables were expressed per SD to allow for comparison of effect sizes. RESULTS Maternal intake of total fat and saturated fat was positively associated with infant percent body fat (%BF) (β: 0.84 per SD, P = 0.04; β: 0.96 per SD, P = 0.01, respectively). Added sugar intake was positively associated with infant weight-for-length z score (β: 0.16 per SD, P = 0.02), and excessive added sugar intake was positively associated with %BF at 6 mo (β: 0.75 per SD, P = 0.05). CONCLUSIONS In a predominantly fully breastfeeding cohort of women, maternal intake of fat and added sugar during pregnancy and lactation were associated with small increases in infant adiposity and relative weight at 6 mo. Additional research is needed to determine if these relations persist later in infancy and if such elevations in adiposity are important for long-term obesity risk.
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Affiliation(s)
- Emily M Nagel
- School of Public Health, University of Minnesota–Twin Cities, Minneapolis, MN, USA
| | - David Jacobs
- School of Public Health, University of Minnesota–Twin Cities, Minneapolis, MN, USA
| | - Kelsey E Johnson
- Department of Genetics, Cell Biology, and Development, University of Minnesota–Twin Cities, Minneapolis, MN, USA
| | - Laurie Foster
- School of Public Health, University of Minnesota–Twin Cities, Minneapolis, MN, USA
| | - Katy Duncan
- Department of Pediatrics, University of Oklahoma College of Medicine, Oklahoma City, OK, USA
| | | | - Brigid Gregg
- Division of Pediatric Endocrinology, University of Michigan, Ann Arbor, MI, USA
| | - Lisa Harnack
- School of Public Health, University of Minnesota–Twin Cities, Minneapolis, MN, USA
| | - David A Fields
- Department of Pediatrics, University of Oklahoma College of Medicine, Oklahoma City, OK, USA
| | - Ellen W Demerath
- School of Public Health, University of Minnesota–Twin Cities, Minneapolis, MN, USA
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Lipidomic profiling of plasma free fatty acids in type-1 diabetes highlights specific changes in lipid metabolism. Biochim Biophys Acta Mol Cell Biol Lipids 2020; 1866:158823. [PMID: 33010452 PMCID: PMC7695620 DOI: 10.1016/j.bbalip.2020.158823] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 08/31/2020] [Accepted: 09/23/2020] [Indexed: 02/06/2023]
Abstract
Type-1 diabetes mellitus (T1DM) is associated with metabolic changes leading to alterations in glucose and lipid handling. While T1DM-associated effects on many major plasma lipids have been characterised, such effects on plasma free fatty acids (FFA) have not been fully examined. Using gas chromatography–mass spectrometry, we measured the plasma concentrations of FFA species in individuals with T1DM (n = 44) and age/sex-matched healthy controls (n = 44). Relationships between FFA species and various parameters were evaluated. Plasma concentrations of myristate (14:0), palmitoleate (16:1), palmitate (16:0), linoleate (18:2), oleate (18:1c9), cis-vaccenate (18:1c11), eicosapentaenoate (20:5), arachidonate (20:4) and docosahexanoate (22:6) were reduced in the T1DM group (p < 0.0001 for all, except p = 0.0020 for eicosapentaenoate and p = 0.0068 for arachidonate); α-linolenate (18:3) and dihomo-γ-linolenate (20:3) concentrations were unchanged. The saturated/unsaturated FFA ratio, n-3/n-6 ratio, de novo lipogenesis index (palmitate (main lipogenesis product)/linoleate (only found in diet)) and elongase index (oleate/palmitoleate) were increased in the T1DM group (p = 0.0166, p = 0.0089, p < 0.0001 and p = 0.0008 respectively). The stearoyl-CoA desaturase 1 (SCD1) index 1 (palmitoleate/palmitate) and index 2 (oleate/stearate) were reduced in T1DM (p < 0.0001 for both). The delta-(5)-desaturase (D5D) index (arachidonate/dihomo-γ-linolenate) was unchanged. Age and sex had no effect on plasma FFA concentrations in T1DM, while SCD1 index 1 was positively correlated (p = 0.098) and elongase index negatively correlated with age (p = 0.0363). HbA1c was negatively correlated with all plasma FFA concentrations measured except α-linolenate and dihomo-γ-linolenate. Correlations were observed between plasma FFA concentrations and cholesterol and HDL concentrations, but not LDL concentration or diabetes duration. Collectively, these results aid our understanding of T1DM and its effects on lipid metabolism. Plasma concentrations of major FFA species are lower in T1DM compared to controls. Plasma FFA concentrations negatively correlates with HbA1c in T1DM. The SCD1 index is reduced in T1DM. Lipogenesis, elongase, n3/n6, saturated/unsaturated indices are increased in T1DM. Collectively, the data highlight specific changes in lipid metabolism in T1DM
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Corsello A, Pugliese D, Gasbarrini A, Armuzzi A. Diet and Nutrients in Gastrointestinal Chronic Diseases. Nutrients 2020; 12:nu12092693. [PMID: 32899273 PMCID: PMC7551310 DOI: 10.3390/nu12092693] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 08/27/2020] [Accepted: 09/01/2020] [Indexed: 02/07/2023] Open
Abstract
Diet and nutrition are known to play key roles in many chronic gastrointestinal diseases, regarding both pathogenesis and therapeutic possibilities. A strong correlation between symptomatology, disease activity and eating habits has been observed in many common diseases, both organic and functional, such as inflammatory bowel disease and irritable bowel syndrome. New different dietary approaches have been evaluated in order improve patients’ symptoms, modulating the type of sugars ingested, the daily amount of fats or the kind of metabolites produced in gut. Even if many clinical studies have been conducted to fully understand the impact of nutrition on the progression of disease, more studies are needed to test the most promising approaches for different diseases, in order to define useful guidelines for patients.
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Affiliation(s)
- Antonio Corsello
- OU Internal Medicine and Gastroenterology, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy; (D.P.); (A.G.); (A.A.)
- Correspondence: ; Tel.: +39-380-381-0206
| | - Daniela Pugliese
- OU Internal Medicine and Gastroenterology, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy; (D.P.); (A.G.); (A.A.)
| | - Antonio Gasbarrini
- OU Internal Medicine and Gastroenterology, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy; (D.P.); (A.G.); (A.A.)
- Istituto di Patologia Speciale Medica, Università Cattolica del Sacro Cuore, Largo F. Vito 1, 00168 Rome, Italy
| | - Alessandro Armuzzi
- OU Internal Medicine and Gastroenterology, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy; (D.P.); (A.G.); (A.A.)
- Istituto di Patologia Speciale Medica, Università Cattolica del Sacro Cuore, Largo F. Vito 1, 00168 Rome, Italy
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Johnson RK, Vanderlinden LA, Dong F, Carry PM, Seifert J, Waugh K, Shorrosh H, Fingerlin T, Frohnert BI, Yang IV, Kechris K, Rewers M, Norris JM. Longitudinal DNA methylation differences precede type 1 diabetes. Sci Rep 2020; 10:3721. [PMID: 32111940 PMCID: PMC7048736 DOI: 10.1038/s41598-020-60758-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 02/14/2020] [Indexed: 12/26/2022] Open
Abstract
DNA methylation may be involved in development of type 1 diabetes (T1D), but previous epigenome-wide association studies were conducted among cases with clinically diagnosed diabetes. Using multiple pre-disease peripheral blood samples on the Illumina 450 K and EPIC platforms, we investigated longitudinal methylation differences between 87 T1D cases and 87 controls from the prospective Diabetes Autoimmunity Study in the Young (DAISY) cohort. Change in methylation with age differed between cases and controls in 10 regions. Average longitudinal methylation differed between cases and controls at two genomic positions and 28 regions. Some methylation differences were detectable and consistent as early as birth, including before and after the onset of preclinical islet autoimmunity. Results map to transcription factors, other protein coding genes, and non-coding regions of the genome with regulatory potential. The identification of methylation differences that predate islet autoimmunity and clinical diagnosis may suggest a role for epigenetics in T1D pathogenesis; however, functional validation is warranted.
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Affiliation(s)
- Randi K Johnson
- University of Colorado Anschutz Medical Campus, Division of Biomedical Informatics and Personalized Medicine, Aurora, CO, USA
| | - Lauren A Vanderlinden
- Colorado School of Public Health, Department of Biostatistics and Informatics, Aurora, CO, USA
| | - Fran Dong
- Barbara Davis Center for Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Patrick M Carry
- Colorado School of Public Health, Department of Epidemiology, Aurora, CO, USA
| | - Jennifer Seifert
- Colorado School of Public Health, Department of Epidemiology, Aurora, CO, USA
| | - Kathleen Waugh
- Barbara Davis Center for Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Hanan Shorrosh
- Barbara Davis Center for Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | | | - Brigitte I Frohnert
- Barbara Davis Center for Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Ivana V Yang
- University of Colorado Anschutz Medical Campus, Division of Biomedical Informatics and Personalized Medicine, Aurora, CO, USA
| | - Katerina Kechris
- Colorado School of Public Health, Department of Biostatistics and Informatics, Aurora, CO, USA
| | - Marian Rewers
- Barbara Davis Center for Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Jill M Norris
- Colorado School of Public Health, Department of Epidemiology, Aurora, CO, USA.
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Joslowski G, Yang J, Aronsson CA, Ahonen S, Butterworth M, Rautanen J, Norris JM, Virtanen SM, Uusitalo U. Development of a harmonized food grouping system for between-country comparisons in the TEDDY Study. J Food Compost Anal 2017; 63:79-88. [PMID: 29151672 PMCID: PMC5690566 DOI: 10.1016/j.jfca.2017.07.037] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The Environmental Determinants of Diabetes in the Young (TEDDY) is an international study aiming to investigate associations between dietary and other environmental factors and the risk of developing islet autoimmunity and type 1 diabetes. Dietary intake was assessed using a 24-hour recall and repeated 3-day food records and analyzed using country-specific food composition databases (FCDBs) in Finland, Germany, Sweden, and the U.S. with respective in-house calculation programs. A food grouping harmonization process between four country-specific FCDBs was conducted to evaluate and achieve comparability on food group definitions and quantification of food consumption across the countries. Systematic review revealed that the majority of existing food groups of the TEDDY FCDBs were not comparable. Therefore, a completely new classification system of 15 mutually exclusive main food groups (e.g. vegetables) and 89 subgroups (e.g. root vegetables, leafy vegetables) was developed. Foods and beverages were categorized into basic foods (single ingredient) and composite dishes (multiple ingredients). Composite dishes were broken down to ingredients using food composition data available in the FCDBs or generic recipes created for the harmonization effort. The daily consumption of every food group across FCDBs was quantified consistently as either raw or prepared weight depending on the food group to achieve maximal comparability.
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Affiliation(s)
- Gesa Joslowski
- Institute of Diabetes Research, Helmholtz Zentrum München and Forschergruppe Diabetes, Klinikum rechts der Isar, Technische Universität München and Forschergruppe Diabetes e.V., Koelner Platz 1, Munich, 80804, Germany
| | - Jimin Yang
- Health Informatics Institute, Department of Pediatrics, Morsani College of Medicine, University of South Florida, 3650 Spectrum Blvd, Tampa, FL, 33612, USA
| | - Carin Andrén Aronsson
- Department of Clinical Sciences, Lund University, CRC 60:11, Jan Waldenstroms gata 35, Malmö, SE-20502, Sweden
| | - Suvi Ahonen
- National Institute for Health and Welfare, Department of Public Health Solutions, Nutrition Unit. University of Tampere, Faculty of Social Sciences. Science Centre, Tampere University Hospital. Mannerheimintie 166, Helsinki, 00300, Finland
| | - Martha Butterworth
- Health Informatics Institute, Department of Pediatrics, Morsani College of Medicine, University of South Florida, 3650 Spectrum Blvd, Tampa, FL, 33612, USA
| | - Jenna Rautanen
- National Institute for Health and Welfare, Department of Public Health Solutions, Nutrition Unit. Mannerheimintie 166, Helsinki, 00300, Finland
| | - Jill M. Norris
- Department of Epidemiology, University of Colorado Denver, Colorado School of Public Health, 13001 East 17th Place, Aurora, CO, 80045, USA
| | - Suvi M. Virtanen
- National Institute for Health and Welfare, Department of Public Health Solutions, Nutrition Unit. University of Tampere, Faculty of Social Sciences. Science Centre, Tampere University Hospital. Center for Child Health Research, University of Tampere and Tampere University Hospital. Mannerheimintie 166, Helsinki, 00300, Finland
| | - Ulla Uusitalo
- Health Informatics Institute, Department of Pediatrics, Morsani College of Medicine, University of South Florida, 3650 Spectrum Blvd, Tampa, FL, 33612, USA
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Frohnert BI, Ide L, Dong F, Barón AE, Steck AK, Norris JM, Rewers MJ. Late-onset islet autoimmunity in childhood: the Diabetes Autoimmunity Study in the Young (DAISY). Diabetologia 2017; 60:998-1006. [PMID: 28314946 PMCID: PMC5504909 DOI: 10.1007/s00125-017-4256-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Accepted: 02/08/2017] [Indexed: 01/13/2023]
Abstract
AIMS/HYPOTHESIS We sought to assess the frequency, determinants and prognosis for future diabetes in individuals with islet autoimmunity and whether these factors differ depending on the age of onset of islet autoimmunity. METHODS A prospective cohort (n = 2547) of children from the general population who had a high-risk HLA genotype and children who had a first-degree relative with type 1 diabetes were followed for up to 21 years. Those with the persistent presence of one or more islet autoantibodies were categorised as early-onset (<8 years of age, n = 143, median 3.3 years) or late-onset (≥8 years of age, n = 64, median 11.1 years), and were followed for a median of 7.4 and 4.7 years, respectively. Progression to diabetes was evaluated by Kaplan-Meier analysis with logrank test. Factors associated with progression to diabetes were analysed using the parametric accelerated failure time model. RESULTS Children with late-onset islet autoimmunity were more likely to be Hispanic or African-American than non-Hispanic white (p = 0.004), and less likely to be siblings of individuals with type 1 diabetes (p = 0.04). The frequencies of the HLA-DR3/4 genotype and non-HLA gene variants associated with type 1 diabetes did not differ between the two groups. However, age and HLA-DR3/4 were important predictors of rate of progression to both the presence of additional autoantibodies and type 1 diabetes. Late-onset islet autoimmunity was more likely to present with a single islet autoantibody (p = 0.01) and revert to an antibody-negative state (p = 0.01). Progression to diabetes was significantly slower in children with late-onset islet autoimmunity (p < 0.001). CONCLUSIONS/INTERPRETATION A late onset of islet autoimmunity is more common in African-American and Hispanic individuals. About half of those with late-onset islet autoimmunity progress to show multiple islet autoantibodies and develop diabetes in adolescence or early adulthood. Further investigation of environmental determinants of late-onset autoimmunity may lead to an understanding of and ability to prevent adolescent and adult-onset type 1 diabetes.
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Affiliation(s)
- Brigitte I Frohnert
- Barbara Davis Center for Childhood Diabetes, School of Medicine, University of Colorado, 1775 Aurora Court, A140, Aurora, CO, 80045, USA.
| | - Lisa Ide
- Barbara Davis Center for Childhood Diabetes, School of Medicine, University of Colorado, 1775 Aurora Court, A140, Aurora, CO, 80045, USA
| | - Fran Dong
- Barbara Davis Center for Childhood Diabetes, School of Medicine, University of Colorado, 1775 Aurora Court, A140, Aurora, CO, 80045, USA
| | - Anna E Barón
- Department of Biostatistics and Informatics, Colorado School of Public Health, University of Colorado, Aurora, CO, USA
| | - Andrea K Steck
- Barbara Davis Center for Childhood Diabetes, School of Medicine, University of Colorado, 1775 Aurora Court, A140, Aurora, CO, 80045, USA
| | - Jill M Norris
- Department of Epidemiology, Colorado School of Public Health, University of Colorado, Aurora, CO, USA
| | - Marian J Rewers
- Barbara Davis Center for Childhood Diabetes, School of Medicine, University of Colorado, 1775 Aurora Court, A140, Aurora, CO, 80045, USA
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Virtanen SM. Dietary factors in the development of type 1 diabetes. Pediatr Diabetes 2016; 17 Suppl 22:49-55. [PMID: 27411437 DOI: 10.1111/pedi.12341] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 11/02/2015] [Accepted: 11/06/2015] [Indexed: 12/13/2022] Open
Abstract
There are several indicators concerning the putative importance of dietary factors during the fetal period lactation, infancy and childhood in the etiology of type 1 diabetes. Among foods, cow's milk consumption has been associated with an increased risk of preclinical and/or clinical type 1 diabetes and sugars with a progression from preclinical to clinical disease. Breast milk, on the other hand, may be protective. Processed foods may be related to a greater risk of type 1 diabetes because they contain higher amounts of advanced glycation end-products. Nitrites or N-nitroso compounds in processed meat products could increase the risk of this disease. Among nutrients, n-3 fatty acids, vitamins D and E, and zinc may protect from preclinical and/or clinical type 1 diabetes. The microbial composition of foods or food's other effects on gut microbiota are receiving increasing attention, also due to their putative role in the development of type 1 diabetes. Still the number of prospective studies in this research field is limited and most of the findings remain to be replicated.
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Affiliation(s)
- Suvi M Virtanen
- Unit of Nutrition, Department of Health, National Institute for Health and Welfare, Helsinki, Finland.,School of Health Sciences, University of Tampere, Tampere, Finland.,Science Center of Pirkanmaa Hospital District, Tampere, Finland.,Center for Child Health Research, University of Tampere and University Hospital of Tampere, Tampere, Finland
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9
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Davis-Richardson AG, Triplett EW. A model for the role of gut bacteria in the development of autoimmunity for type 1 diabetes. Diabetologia 2015; 58:1386-93. [PMID: 25957231 PMCID: PMC4473028 DOI: 10.1007/s00125-015-3614-8] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Accepted: 03/27/2015] [Indexed: 01/05/2023]
Abstract
Several lines of evidence suggest a role for the gut microbiome in type 1 diabetes. Treating diabetes-prone rodents with probiotics or antibiotics prevents the development of the disorder. Diabetes-prone rodents also have a distinctly different gut microbiome compared with healthy rodents. Recent studies in children with a high genetic risk for type 1 diabetes demonstrate significant differences in the gut microbiome between children who develop autoimmunity for the disease and those who remain healthy. However, the differences in microbiome composition between autoimmune and healthy children are not consistent across all studies because of the strong environmental influences on microbiome composition, particularly diet and geography. Controlling confounding factors of microbiome composition uncovers bacterial associations with disease. For example, in a human cohort from a single Finnish city where geography is confined, a strong association between one dominant bacterial species, Bacteroides dorei, and type 1 diabetes was discovered (Davis-Richardson et al. Front Microbiol 2014;5:678). Beyond this, recent DNA methylation analyses suggest that a thorough epigenetic analysis of the gut microbiome may be warranted. These studies suggest a testable model whereby a diet high in fat and gluten and low in resistant starch may be the primary driver of gut dysbiosis. This dysbiosis may cause a lack of butyrate production by gut bacteria, which, in turn, leads to the development of a permeable gut followed by autoimmunity. The bacterial community responsible for these changes in butyrate production may vary around the world, but bacteria of the genus Bacteroides are thought to play a key role.
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Affiliation(s)
- Austin G. Davis-Richardson
- Microbiology and Cell Science Department, Institute of Food and Agricultural Sciences, 1355 Museum Road, PO Box 110700, Gainesville, FL 32611-0700 USA
| | - Eric W. Triplett
- Microbiology and Cell Science Department, Institute of Food and Agricultural Sciences, 1355 Museum Road, PO Box 110700, Gainesville, FL 32611-0700 USA
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Role of nutritional factors at the early life stages in the pathogenesis and clinical course of type 1 diabetes. BIOMED RESEARCH INTERNATIONAL 2015; 2015:382165. [PMID: 25883958 PMCID: PMC4391527 DOI: 10.1155/2015/382165] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Revised: 11/02/2014] [Accepted: 11/03/2014] [Indexed: 02/06/2023]
Abstract
Nutrition has been suggested as an important environmental factor other than viruses and chemicals in the pathogenesis of type 1 diabetes (T1D). Whereas various maternal dietary nutritional elements have been suggested and examined in T1D of both humans and experimental animals, the results largely remain controversial. In a series of studies using T1D model nonobese diabetic (NOD) mice, maternal dietary n-6/n-3 essential fatty acid ratio during pregnancy and lactation period, that is, early life stages of the offspring, has been shown to affect pathogenesis of insulitis and strongly prevent overt T1D of the offspring, which is consistent with its preventive effects on other allergic diseases.
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11
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Luminex and other multiplex high throughput technologies for the identification of, and host response to, environmental triggers of type 1 diabetes. BIOMED RESEARCH INTERNATIONAL 2015; 2015:326918. [PMID: 25883955 PMCID: PMC4389818 DOI: 10.1155/2015/326918] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Accepted: 09/07/2014] [Indexed: 12/16/2022]
Abstract
Complex interactions between a series of environmental factors and genes result in progression to clinical type 1 diabetes in genetically susceptible individuals. Despite several decades of research in the area, these interactions remain poorly understood. Several studies have yielded associations of certain foods, infections, and immunizations with the onset and progression of diabetes autoimmunity, but most findings are still inconclusive. Environmental triggers are difficult to identify mainly due to (i) large number and complex nature of environmental exposures, including bacteria, viruses, dietary factors, and environmental pollutants, (ii) reliance on low throughput technology, (iii) less efforts in quantifying host response, (iv) long silent period between the exposure and clinical onset of T1D which may lead to loss of the exposure fingerprints, and (v) limited sample sets. Recent development in multiplex technologies has enabled systematic evaluation of different classes of molecules or macroparticles in a high throughput manner. However, the use of multiplex assays in type 1 diabetes research is limited to cytokine assays. In this review, we will discuss the potential use of multiplex high throughput technologies in identification of environmental triggers and host response in type 1 diabetes.
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Salonen KM, Ryhänen SJ, Forbes JM, Härkönen T, Ilonen J, Laine AP, Groop PH, Knip M. Circulating concentrations of soluble receptor for AGE are associated with age and AGER gene polymorphisms in children with newly diagnosed type 1 diabetes. Diabetes Care 2014; 37:1975-81. [PMID: 24742661 DOI: 10.2337/dc13-3049] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
OBJECTIVE We analyzed the relationship among soluble receptor for advanced glycation end products (sRAGEs), the clinical phenotype, HLA genotype, and risk-associated single nucleotide polymorphisms (SNPs) in the AGER gene in a large population of Finnish children with newly diagnosed type 1 diabetes. RESEARCH DESIGN AND METHODS Samples from 2,115 clinically phenotyped children <15 years of age in whom type 1 diabetes was diagnosed and 316 control subjects were analyzed for sRAGEs. Three SNPs of AGER, previously associated with HLA-DR/DQ haplotype independent diabetes risk (rs2070600, rs9469089, and rs17493811), were analyzed in 1,390 affected subjects. RESULTS Children with type 1 diabetes and control subjects had similar sRAGE concentrations (1,171 vs. 1,153 pg/mL, P = 0.48). There was a correlation between age at diagnosis and serum sRAGE concentrations (r = 0.10, P < 0.001) among the patients but not among the control subjects. Children <2 years of age had the lowest concentrations in the diabetic population (1,027 vs. 1,181 pg/mL, P < 0.001) and the highest among the control subjects (1,329 vs. 1,140 pg/mL, P = 0.04). Ketoacidosis at diagnosis was associated with reduced concentrations (1,086 vs. 1,190 pg/mL, P < 0.001). HLA DR3/DR4 heterozygosity and the DR3 allele were associated with reduced sRAGE concentrations. The predisposing AA genotype of rs2070600 was associated with decreased sRAGE concentrations, while the protective CC genotype of rs9469089 was linked to increased concentrations. CONCLUSIONS Age and AGER polymorphisms are associated with the circulating sRAGE concentration among children with type 1 diabetes. The observations of reduced sRAGE concentrations in young children, in those with ketoacidosis, and in carriers of the high-risk HLA DR3/DR4 genotype suggest that decreased sRAGE concentration reflects a more aggressive disease phenotype.
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Affiliation(s)
- Kirsi M Salonen
- Children's Hospital, University of Helsinki and Helsinki University Central Hospital, Helsinki, FinlandDiabetes and Obesity Research Program, University of Helsinki, Helsinki, Finland
| | - Samppa J Ryhänen
- Children's Hospital, University of Helsinki and Helsinki University Central Hospital, Helsinki, FinlandDiabetes and Obesity Research Program, University of Helsinki, Helsinki, Finland
| | - Josephine M Forbes
- Mater Research, Diamantina Institute, Translational Research Institute, University of Queensland, Brisbane, Queensland, Australia
| | - Taina Härkönen
- Children's Hospital, University of Helsinki and Helsinki University Central Hospital, Helsinki, FinlandDiabetes and Obesity Research Program, University of Helsinki, Helsinki, Finland
| | - Jorma Ilonen
- Immunogenetics Laboratory, University of Turku, Turku, FinlandDepartment of Clinical Microbiology, University of Eastern Finland, Kuopio, Finland
| | | | - Per-Henrik Groop
- Diabetes and Obesity Research Program, University of Helsinki, Helsinki, FinlandFolkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, FinlandDivision of Nephrology, Department of Medicine, Helsinki University Central Hospital, Biomedicum Helsinki, Helsinki, FinlandBaker IDI Heart & Diabetes Institute, Melbourne, Victoria, Australia
| | - Mikael Knip
- Children's Hospital, University of Helsinki and Helsinki University Central Hospital, Helsinki, FinlandDiabetes and Obesity Research Program, University of Helsinki, Helsinki, FinlandFolkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, FinlandDepartment of Pediatrics, Tampere University Hospital, Tampere, Finland
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Frederiksen B, Kroehl M, Lamb MM, Seifert J, Barriga K, Eisenbarth GS, Rewers M, Norris JM. Infant exposures and development of type 1 diabetes mellitus: The Diabetes Autoimmunity Study in the Young (DAISY). JAMA Pediatr 2013; 167:808-15. [PMID: 23836309 PMCID: PMC4038357 DOI: 10.1001/jamapediatrics.2013.317] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
IMPORTANCE The incidence of type 1 diabetes mellitus (T1DM) is increasing worldwide, with the most rapid increase among children younger than 5 years of age. OBJECTIVE To examine the associations between perinatal and infant exposures, especially early infant diet, and the development of T1DM. DESIGN The Diabetes Autoimmunity Study in the Young (DAISY) is a longitudinal, observational study. SETTING Newborn screening for human leukocyte antigen (HLA) was done at St. Joseph's Hospital in Denver, Colorado. First-degree relatives of individuals with T1DM were recruited from the Denver metropolitan area. PARTICIPANTS A total of 1835 children at increased genetic risk for T1DM followed up from birth with complete prospective assessment of infant diet. Fifty-three children developed T1DM. EXPOSURES Early (<4 months of age) and late (≥6 months of age) first exposure to solid foods compared with first exposures at 4 to 5 months of age (referent). MAIN OUTCOME AND MEASURE Risk for T1DM diagnosed by a physician. RESULTS Both early and late first exposure to any solid food predicted development of T1DM (hazard ratio [HR], 1.91; 95% CI, 1.04-3.51, and HR, 3.02; 95% CI, 1.26-7.24, respectively), adjusting for the HLA-DR genotype, first-degree relative with T1DM, maternal education, and delivery type. Specifically, early exposure to fruit and late exposure to rice/oat predicted T1DM (HR, 2.23; 95% CI, 1.14-4.39, and HR, 2.88; 95% CI, 1.36-6.11, respectively), while breastfeeding at the time of introduction to wheat/barley conferred protection (HR, 0.47; 95% CI, 0.26-0.86). Complicated vaginal delivery was also a predictor of T1DM (HR, 1.93; 95% CI, 1.03-3.61). CONCLUSIONS AND RELEVANCE These results suggest the safest age to introduce solid foods in children at increased genetic risk for T1DM is between 4 and 5 months of age. Breastfeeding while introducing new foods may reduce T1DM risk.
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Nokoff N, Rewers M. Pathogenesis of type 1 diabetes: lessons from natural history studies of high-risk individuals. Ann N Y Acad Sci 2013; 1281:1-15. [PMID: 23360422 PMCID: PMC3715099 DOI: 10.1111/nyas.12021] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Type 1 diabetes (T1D) is an autoimmune disease characterized by known genetic risk factors with T cell-mediated infiltration and destruction of the beta cells within pancreatic islets. Autoantibodies are the most significant preclinical marker of T1D, and birth cohort studies have provided important insights into the natural history of autoimmunity and T1D. While HLA remains the strongest genetic risk factor, a number of novel gene variants associated with T1D have been found through genome-wide studies, some of which have been linked to suspected environmental risk factors. Multiple environmental factors that have been suggested to play a role in the development of T1D await confirmation. Current risk-stratification models for T1D take into account genetic risk factors and autoantibodies. In the future, metabolic profiles, epigenetics, as well as environmental risk factors may be included in such models.
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Affiliation(s)
- Natalie Nokoff
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO 80045, USA.
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Zhang Q, Fillmore TL, Schepmoes AA, Clauss TRW, Gritsenko MA, Mueller PW, Rewers M, Atkinson MA, Smith RD, Metz TO. Serum proteomics reveals systemic dysregulation of innate immunity in type 1 diabetes. ACTA ACUST UNITED AC 2012; 210:191-203. [PMID: 23277452 PMCID: PMC3549705 DOI: 10.1084/jem.20111843] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Proteomics analysis identifies human serum proteins involved with innate immune responses, complement activation, and blood coagulation that are diagnostic for type 1 diabetes. Using global liquid chromatography-mass spectrometry (LC-MS)–based proteomics analyses, we identified 24 serum proteins that were significantly variant between those with type 1 diabetes (T1D) and healthy controls. Functionally, these proteins represent innate immune responses, the activation cascade of complement, inflammatory responses, and blood coagulation. Targeted verification analyses were performed on 52 surrogate peptides representing these proteins, with serum samples from an antibody standardization program cohort of 100 healthy control and 50 type 1 diabetic subjects. 16 peptides were verified as having very good discriminating power, with areas under the receiver operating characteristic curve ≥0.8. Further validation with blinded serum samples from an independent cohort (10 healthy control and 10 type 1 diabetics) demonstrated that peptides from platelet basic protein and C1 inhibitor achieved both 100% sensitivity and 100% specificity for classification of samples. The disease specificity of these proteins was assessed using sera from 50 age-matched type 2 diabetic individuals, and a subset of proteins, C1 inhibitor in particular, were exceptionally good discriminators between these two forms of diabetes. The panel of biomarkers distinguishing those with T1D from healthy controls and those with type 2 diabetes suggests that dysregulated innate immune responses may be associated with the development of this disorder.
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Affiliation(s)
- Qibin Zhang
- Biological Sciences Division and the 2 Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA 99354, USA.
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Eizirik DL, Sammeth M, Bouckenooghe T, Bottu G, Sisino G, Igoillo-Esteve M, Ortis F, Santin I, Colli ML, Barthson J, Bouwens L, Hughes L, Gregory L, Lunter G, Marselli L, Marchetti P, McCarthy MI, Cnop M. The human pancreatic islet transcriptome: expression of candidate genes for type 1 diabetes and the impact of pro-inflammatory cytokines. PLoS Genet 2012; 8:e1002552. [PMID: 22412385 PMCID: PMC3297576 DOI: 10.1371/journal.pgen.1002552] [Citation(s) in RCA: 358] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2011] [Accepted: 01/10/2012] [Indexed: 01/06/2023] Open
Abstract
Type 1 diabetes (T1D) is an autoimmune disease in which pancreatic beta cells are killed by infiltrating immune cells and by cytokines released by these cells. Signaling events occurring in the pancreatic beta cells are decisive for their survival or death in diabetes. We have used RNA sequencing (RNA–seq) to identify transcripts, including splice variants, expressed in human islets of Langerhans under control conditions or following exposure to the pro-inflammatory cytokines interleukin-1β (IL-1β) and interferon-γ (IFN-γ). Based on this unique dataset, we examined whether putative candidate genes for T1D, previously identified by GWAS, are expressed in human islets. A total of 29,776 transcripts were identified as expressed in human islets. Expression of around 20% of these transcripts was modified by pro-inflammatory cytokines, including apoptosis- and inflammation-related genes. Chemokines were among the transcripts most modified by cytokines, a finding confirmed at the protein level by ELISA. Interestingly, 35% of the genes expressed in human islets undergo alternative splicing as annotated in RefSeq, and cytokines caused substantial changes in spliced transcripts. Nova1, previously considered a brain-specific regulator of mRNA splicing, is expressed in islets and its knockdown modified splicing. 25/41 of the candidate genes for T1D are expressed in islets, and cytokines modified expression of several of these transcripts. The present study doubles the number of known genes expressed in human islets and shows that cytokines modify alternative splicing in human islet cells. Importantly, it indicates that more than half of the known T1D candidate genes are expressed in human islets. This, and the production of a large number of chemokines and cytokines by cytokine-exposed islets, reinforces the concept of a dialog between pancreatic islets and the immune system in T1D. This dialog is modulated by candidate genes for the disease at both the immune system and beta cell level. Pancreatic beta cells are destroyed by the immune system in type 1 diabetes mellitus, causing insulin dependence for life. Candidate genes for diabetes contribute to this process by acting both at the immune system and, as we suggest here, at the pancreatic beta cell level. We have utilized a novel technology, RNA sequencing, to define all transcripts expressed in human pancreatic islets under basal conditions and following exposure to cytokines, pro-inflammatory mediators that contribute to trigger diabetes. Our observations double the number of known genes present in human islets and indicate that >60% of the candidate genes for type 1 diabetes are expressed in beta cells. The data also show that pro-inflammatory cytokines modify alternative splicing in human islets, a process that may generate novel RNAs and proteins recognizable by the immune system. This, taken together with the findings that pancreatic beta cells themselves express and release many cytokines and chemokines (proteins that attract immune cells), indicates that early type 1 diabetes is characterized by a dialog between beta cells and the immune system. We suggest that candidate genes for diabetes function at least in part as “writers” for the beta cell words in this dialog.
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Affiliation(s)
- Décio L. Eizirik
- Laboratory of Experimental Medicine, Université Libre de Bruxelles (ULB), Brussels, Belgium
- * E-mail: (DLE); (MC)
| | - Michael Sammeth
- Functional Bioinformatics (FBI), Centre Nacional d'Anàlisi Genòmica (CNAG), Barcelona, Spain
| | - Thomas Bouckenooghe
- Laboratory of Experimental Medicine, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Guy Bottu
- Laboratory of Experimental Medicine, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Giorgia Sisino
- Laboratory of Experimental Medicine, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Mariana Igoillo-Esteve
- Laboratory of Experimental Medicine, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Fernanda Ortis
- Laboratory of Experimental Medicine, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Izortze Santin
- Laboratory of Experimental Medicine, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Maikel L. Colli
- Laboratory of Experimental Medicine, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Jenny Barthson
- Laboratory of Experimental Medicine, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Luc Bouwens
- Cell Differentiation Unit, Diabetes Research Centre, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Linda Hughes
- Oxford Centre for Diabetes, Endocrinology, and Metabolism (OCDEM), Churchill Hospital, Oxford, United Kingdom
| | - Lorna Gregory
- Oxford Centre for Diabetes, Endocrinology, and Metabolism (OCDEM), Churchill Hospital, Oxford, United Kingdom
| | - Gerton Lunter
- Oxford Centre for Diabetes, Endocrinology, and Metabolism (OCDEM), Churchill Hospital, Oxford, United Kingdom
| | - Lorella Marselli
- Department of Endocrinology and Metabolism, University of Pisa, Pisa, Italy
| | - Piero Marchetti
- Department of Endocrinology and Metabolism, University of Pisa, Pisa, Italy
| | - Mark I. McCarthy
- Oxford Centre for Diabetes, Endocrinology, and Metabolism (OCDEM), Churchill Hospital, Oxford, United Kingdom
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
- Oxford NIHR Biomedical Research Centre, Churchill Hospital, Oxford, United Kingdom
| | - Miriam Cnop
- Laboratory of Experimental Medicine, Université Libre de Bruxelles (ULB), Brussels, Belgium
- Division of Endocrinology, Erasmus Hospital, Université Libre de Bruxelles (ULB), Brussels, Belgium
- * E-mail: (DLE); (MC)
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Puett RC, Lamichhane AP, D Nichols M, Lawson AB, A Standiford D, Liu L, Dabelea D, Liese AD. Neighborhood context and incidence of type 1 diabetes: the SEARCH for Diabetes in Youth study. Health Place 2012; 18:911-6. [PMID: 22464158 DOI: 10.1016/j.healthplace.2012.02.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Revised: 02/12/2012] [Accepted: 02/15/2012] [Indexed: 12/21/2022]
Abstract
Findings regarding type 1 diabetes mellitus (T1DM) and neighborhood-level characteristics are mixed, with few US studies examining the influence of race/ethnicity. We conducted an ecologic study using SEARCH for Diabetes in Youth Study data to explore the association of neighborhood characteristics and T1DM incidence. 2002-2003 incident cases among youth at four SEARCH centers were included. Residential addresses were geocoded to US Census Tract. Standardized incidence ratios tended to increase with increasing education and median household income. Results from Poisson regression mixed models were similar and stable across race/ethnic groups and population density. Our study suggests a relationship of T1DM incidence with neighborhood-level socioeconomic status, independent of individual-level race/ethnic differences.
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Affiliation(s)
- Robin C Puett
- Maryland Institute for Applied Environmental Health, University of Maryland School of Public Health, College Park, MD 20742, USA.
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Nokoff NJ, Rewers M, Cree Green M. The interplay of autoimmunity and insulin resistance in type 1 diabetes. DISCOVERY MEDICINE 2012; 13:115-22. [PMID: 22369970 PMCID: PMC5074679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Type 1 diabetes (T1D) is a common chronic disease characterized by selective autoimmune destruction of the pancreatic islet beta cells and subsequent dependence on exogenous insulin. Certain alleles including the high-risk HLA genotype, HLA-DR3-DQ2/DR4-DQ8, place individuals at increased risk of developing T1D. Autoantibodies to beta cell antigens are used in the diagnosis of T1D, and studies have shown that they can be used to predict risk of developing T1D in first degree relatives of probands. The annual global incidence of T1D is increasing by 3-5% per year. Many environmental factors have been implicated in the rising incidence of T1D. Proponents of the accelerator hypothesis argue that T1D and type 2 diabetes (T2D) are the same disorder of insulin resistance, although with different genetic backgrounds. While insulin resistance is a recognized hallmark of T2D, it also appears to play a significant role in the pathogenesis of T1D and its vascular complications. In this article, we will review: 1) immunogenetics of T1D, 2) risk factors for the development of islet autoimmunity and T1D, 3) mechanisms of insulin resistance in T1D, and 4) links between insulin resistance and complications in T1D. Further studies are needed to define environmental factors causing T1D as well as the role of insulin resistance in the pathogenesis of T1D and its complications.
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Affiliation(s)
- Natalie J Nokoff
- Department of Pediatrics and Barbara Davis Center for Childhood Diabetes, University of Colorado School of Medicine, Aurora, Colorado 80045, USA
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