title: Autoantibodies against IA-2, GAD, and topoisomerase II in type 1 diabetic patients.
abstract: Prevalence of autoantibodies against IA-2 (IA-2A), glutamic acid decarboxylase (GADA), and type II DNA topoisomerase (TopIIA) of Taiwanese type 1 diabetes mellitus (T1DM) patients was investigated. Correlations of these autoantibodies with patients' clinical manifestations were also analyzed. Prevalence of IA-2A, GADA, and TopIIA in our patients was 23.6%, 47.1%, and 55.2%, respectively. Eighty percent of the IA-2A recognized the carboxyl terminus of the IA-2 protein tyrosine phosphatase-like domain. Average disease duration of IA-2A+ patients was significantly shorter than that of IA-2A- patients [3.76+/-0.42 vs. 4.98+/-0.34 years, p = 0.028]. Presence of GADA was correlated with the mean age of onset [10.82+/-0.76 vs. 8.38+/-0.77 years for GADA+ and GADA- patients, p = 0.026]. Patients with adolescent onset have higher GADA prevalence and better residual beta-cell functions. TopIIA and GADA are suggested to be better markers for Taiwanese T1DM patients because of their higher prevalence and persistence.
authors.affiliation: School of Medical Technology, Chung Shan Medical University, Taichung, Taiwan, ROC. cyh@csmu.edu.tw
authors.forename: Yih-Hsin
authors.initials: YH
authors.lastname: Chang
authors.forename: Ming-Yuh
authors.initials: MY
authors.lastname: Shiau
authors.forename: Shih-Tzer
authors.initials: ST
authors.lastname: Tsai
authors.forename: Michael S
authors.initials: MS
authors.lastname: Lan
mesh_terms: D000293:Adolescent; D000328:Adult; D044466:Asian People / Q000706:statistics & numerical data; D001323:Autoantibodies / Q000097:blood* / Q000276:immunology*; D015415:Biomarkers / Q000097:blood; D002648:Child; D002675:Child, Preschool; D004250:DNA Topoisomerases, Type II / Q000097:blood / Q000276:immunology*; D003922:Diabetes Mellitus, Type 1 / Q000097:blood / Q000453:epidemiology* / Q000208:ethnology / Q000276:immunology*; D005260:Female; D005968:Glutamate Decarboxylase / Q000097:blood / Q000276:immunology*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D018570:Risk Assessment / Q000379:methods; D012307:Risk Factors; D013624:Taiwan / Q000453:epidemiology
chemical_list: D001323:Autoantibodies; D015415:Biomarkers; C096322:ICA512 autoantibody; D005968:Glutamate Decarboxylase; D004250:DNA Topoisomerases, Type II