Family history of type 1 and type 2 diabetes and risk of latent autoimmune diabetes in adults (LADA)Show others and affiliations
2017 (English)In: Diabetes & Metabolism, ISSN 1262-3636, E-ISSN 1878-1780, Vol. 43, no 6, p. 536-542Article in journal (Refereed) Published
Abstract [en]
Background. - A family history of diabetes (FHD) is a strong predictor of diabetes risk, yet has rarely been investigated in latent autoimmune diabetes in adults (LADA). This study therefore investigated the risk of LADA and type 2 diabetes (T2D) in relation to FHD, taking into account the type of diabetes in relatives. Methods. - Data from a population-based study were used, including incident cases of LADA [glutamic acid decarboxylase antibody (GADA)-positive, n = 378] and T2D (GADA-negative, n = 1199), and their matched controls (n = 1484). First-degree relatives with disease onset at age < 40 years and taking insulin treatment were classified as type 1 diabetes (T1D) or, if otherwise, as T2D. Odds ratios (ORs) were adjusted for age, gender, BMI, education and smoking. Cases were genotyped for high- and low-risk HLA genotypes. Results. - Both FHD-T1D (OR: 5.8; 95% CI: 3.2-10.3) and FHD-T2D (OR: 1.9; 95% CI: 1.5-2.5) were associated with an increased risk of LADA, whereas the risk of T2D was associated with FHD-T2D (OR: 2.7; 95% CI: 2.2-3.3), but not FHD-Tl D. In LADA patients, FHD-T1D vs FHD-T2D was associated with higher GADA but lower C-peptide levels, lower prevalence of low-risk HLA genotypes (5.0% vs 28.6%, respectively; P = 0.038) and a tendency for higher prevalence of high-risk genotypes (90.0% vs 69.1%, respectively; P = 0.0576). Conclusion. - The risk of LADA is substantially increased with FHD-Tl D but also, albeit significantly less so, with FHD-T2D. This supports the idea of LADA as a mix of both T1D and T2D, but suggests that the genes related to T1D have greater impact. LADA patients with FHD-Tl D had more T1D-like features, emphasizing the heterogeneity of LADA. (C) 2017 Elsevier Masson SAS. All rights reserved.
Place, publisher, year, edition, pages
MASSON EDITEUR , 2017. Vol. 43, no 6, p. 536-542
Keywords [en]
Autoimmune diabetes, Case-control study, Family history of diabetes, Heredity, Latent autoimmune diabetes in adults, Type 2 diabetes
National Category
Endocrinology and Diabetes
Identifiers
URN: urn:nbn:se:uu:diva-340480DOI: 10.1016/j.diabet.2017.05.010ISI: 000419260000006OAI: oai:DiVA.org:uu-340480DiVA, id: diva2:1178909
2018-01-312018-01-312018-01-31Bibliographically approved