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Type 2 diabetes susceptibility gene variants predispose to adult-onset autoimmune diabetes
Vise andre og tillknytning
2014 (engelsk)Inngår i: Diabetologia, ISSN 0012-186X, E-ISSN 1432-0428, Vol. 57, nr 9, s. 1859-1868Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Aims/hypothesis Latent autoimmune diabetes in adults (LADA) is phenotypically a hybrid of type 1 and type 2 diabetes. Genetically LADA is poorly characterised but does share genetic predisposition with type 1 diabetes. We aimed to improve the genetic characterisation of LADA and hypothesised that type 2 diabetes-associated gene variants also predispose to LADA, and that the associations would be strongest in LADA patients with low levels of GAD autoantibodies (GADA). Methods We assessed 41 type 2 diabetes-associated gene variants in Finnish (phase I) and Swedish (phase II) patients with LADA (n=911) or type 1 diabetes (n=406), all diagnosed after the age of 35 years, as well as in non-diabetic control individuals 40 years or older (n=4,002). Results Variants in the ZMIZ1 (rs12571751, p=4.1 x 10(-5)) and TCF7L2 (rs7903146, p=5.8 x 10(-4)) loci were strongly associated with LADA. Variants in the KCNQ1 (rs2237895, p=0.0012), HHEX (rs1111875, p=0.0024 in Finns) and MTNR1B (rs10830963, p=0.0039) loci showed the strongest association in patients with low GADA, supporting the hypothesis that the disease in these patients is more like type 2 diabetes. In contrast, variants in the KLHDC5 (rs10842994, p=9.5 x 10(-4) in Finns), TP53INP1 (rs896854, p=0.005), CDKAL1 (rs7756992, p=7.0 x 10(-4); rs7754840, p=8.8 x 10(-4)) and PROX1 (rs340874, p=0.003) loci showed the strongest association in patients with high GADA. For type 1 diabetes, a strong association was seen for MTNR1B (rs10830963, p=3.2 x 10(-6)) and HNF1A (rs2650000, p=0.0012). Conclusions/interpretation LADA and adult-onset type 1 diabetes share genetic risk variants with type 2 diabetes, supporting the idea of a hybrid form of diabetes and distinguishing them from patients with classical young-onset type 1 diabetes.

sted, utgiver, år, opplag, sider
Springer, 2014. Vol. 57, nr 9, s. 1859-1868
Emneord [en]
Adult-onset type 1 diabetes, GADA, GAD autoantibodies, Genetics, HNF1A, LADA, Latent autoimmune diabetes in adults, MTNR1B, TCF7L2, ZMIZ1
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Identifikatorer
URN: urn:nbn:se:umu:diva-92900DOI: 10.1007/s00125-014-3287-8ISI: 000340050800016OAI: oai:DiVA.org:umu-92900DiVA, id: diva2:748203
Tilgjengelig fra: 2014-09-18 Laget: 2014-09-09 Sist oppdatert: 2018-06-07bibliografisk kontrollert

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