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Med."],"published-print":{"date-parts":[[2013,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Aims<\/jats:title><jats:p>The aim was to evaluate the impact of family history of diabetes on the phenotype of patients diagnosed with Type\u00a02 diabetes and the frequency of susceptibility genotypes.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Patients with Type\u00a02 diabetes with family history for both Type\u00a01 and Type\u00a02 diabetes (<jats:styled-content style=\"fixed-case\">FH<jats:sub>MIX<\/jats:sub><\/jats:styled-content>,<jats:italic> n<\/jats:italic>\u00a0=\u00a0196) or Type\u00a02 diabetes only (<jats:styled-content style=\"fixed-case\">FH<jats:sub>T<\/jats:sub><\/jats:styled-content><jats:sub>2<\/jats:sub>, <jats:italic>n<\/jats:italic>\u00a0=\u00a0139) matched for age, sex, <jats:styled-content style=\"fixed-case\">BMI<\/jats:styled-content> and age at diagnosis, underwent an oral glucose tolerance test and a combined glucagon test and insulin tolerance test. Glutamic acid decarboxylase (<jats:styled-content style=\"fixed-case\">GAD<\/jats:styled-content>) antibodies and major Type\u00a01 and Type\u00a02 diabetes susceptibility gene variants were analysed. Patients were stratified into groups according to family history or <jats:styled-content style=\"fixed-case\">GAD<\/jats:styled-content> antibody positivity (<jats:styled-content style=\"fixed-case\">GADA<\/jats:styled-content>+, <jats:styled-content style=\"fixed-case\">GADA<\/jats:styled-content>\u2013) or a combination of these (<jats:styled-content style=\"fixed-case\">GADA<\/jats:styled-content>+\/<jats:styled-content style=\"fixed-case\">FH<jats:sub>MIX<\/jats:sub><\/jats:styled-content><jats:sub>,<\/jats:sub> <jats:styled-content style=\"fixed-case\">GADA<\/jats:styled-content>+\/<jats:styled-content style=\"fixed-case\">FH<jats:sub>T<\/jats:sub><\/jats:styled-content><jats:sub>2,<\/jats:sub> <jats:styled-content style=\"fixed-case\">GADA<\/jats:styled-content>\u2013\/<jats:styled-content style=\"fixed-case\">FH<jats:sub>MIX<\/jats:sub><\/jats:styled-content><jats:sub>,<\/jats:sub> <jats:styled-content style=\"fixed-case\">GADA<\/jats:styled-content>\u2013\/<jats:styled-content style=\"fixed-case\">FH<jats:sub>T<\/jats:sub><\/jats:styled-content><jats:sub>2<\/jats:sub>).<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Compared with other patients, those with <jats:styled-content style=\"fixed-case\">FH<jats:sub>MIX<\/jats:sub><\/jats:styled-content> more often had <jats:styled-content style=\"fixed-case\">GAD<\/jats:styled-content> antibodies (14.3 vs. 4.3%, <jats:italic>P<\/jats:italic>\u00a0=\u00a00.003), and those with both <jats:styled-content style=\"fixed-case\">FH<jats:sub>MIX<\/jats:sub><\/jats:styled-content> and <jats:styled-content style=\"fixed-case\">GAD<\/jats:styled-content> antibodies had the highest frequency of insulin deficiency (stimulated serum C\u2010peptide &lt;\u00a00.7\u00a0nmol\/l, <jats:styled-content style=\"fixed-case\">GADA<\/jats:styled-content>+\/<jats:styled-content style=\"fixed-case\">FH<jats:sub>MIX<\/jats:sub><\/jats:styled-content> 46.4% vs. <jats:styled-content style=\"fixed-case\">GADA<\/jats:styled-content>\u2013\/<jats:styled-content style=\"fixed-case\">FH<jats:sub>MIX<\/jats:sub><\/jats:styled-content> 9.5% (<jats:italic>P<\/jats:italic>\u00a0&lt;\u00a00.00001), <jats:styled-content style=\"fixed-case\">GADA<\/jats:styled-content>\u2013\/<jats:styled-content style=\"fixed-case\">FH<jats:sub>T<\/jats:sub><\/jats:styled-content><jats:sub>2<\/jats:sub> 4.5% (<jats:italic>P<\/jats:italic>\u00a0&lt;\u00a00.00001), <jats:styled-content style=\"fixed-case\">GADA<\/jats:styled-content>+\/<jats:styled-content style=\"fixed-case\">FH<jats:sub>T<\/jats:sub><\/jats:styled-content><jats:sub>2<\/jats:sub> 0%). Patients with <jats:styled-content style=\"fixed-case\">GADA<\/jats:styled-content>+\/<jats:styled-content style=\"fixed-case\">FH<jats:sub>MIX<\/jats:sub><\/jats:styled-content> more often had <jats:italic><jats:styled-content style=\"fixed-case\">HLA<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">DQB<\/jats:styled-content>1<\/jats:italic> risk genotypes compared with patients with <jats:styled-content style=\"fixed-case\">GADA<\/jats:styled-content>\u2013\/<jats:styled-content style=\"fixed-case\">FH<jats:sub>MIX<\/jats:sub><\/jats:styled-content> or <jats:styled-content style=\"fixed-case\">GADA<\/jats:styled-content>\u2013\/<jats:styled-content style=\"fixed-case\">FH<jats:sub>T<\/jats:sub><\/jats:styled-content><jats:sub>2D<\/jats:sub> (47 vs. 23 or 14%, <jats:italic>P<\/jats:italic>\u00a0=\u00a00.05 and <jats:italic>P<\/jats:italic>\u00a0&lt;\u00a00.00001, respectively). In logistic regression analyses, <jats:styled-content style=\"fixed-case\">FH<jats:sub>MIX<\/jats:sub><\/jats:styled-content>,<jats:styled-content style=\"fixed-case\"> GAD<\/jats:styled-content> antibody positivity and <jats:italic><jats:styled-content style=\"fixed-case\">HLA<\/jats:styled-content><\/jats:italic> risk genotypes were independently associated with insulin deficiency.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>A family history for both type 1 and type 2 diabetes was associated with higher prevalence of <jats:styled-content style=\"fixed-case\">GAD<\/jats:styled-content> antibodies and <jats:italic><jats:styled-content style=\"fixed-case\">HLA<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">DQB<\/jats:styled-content>1<\/jats:italic> risk genotypes than a family history of type 2 diabetes only, and was associated with earlier and more severe development of insulin deficiency, which was only partially explained by <jats:styled-content style=\"fixed-case\">GAD<\/jats:styled-content> antibodies and <jats:italic><jats:styled-content style=\"fixed-case\">HLA<\/jats:styled-content><\/jats:italic>.<\/jats:p><\/jats:sec>","DOI":"10.1111\/dme.12069","type":"journal-article","created":{"date-parts":[[2012,11,16]],"date-time":"2012-11-16T12:46:45Z","timestamp":1353070005000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Family history of Type\u00a01 diabetes affects insulin secretion in patients with \u2018Type\u00a02\u2019 diabetes"],"prefix":"10.1111","volume":"30","author":[{"given":"V. 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