Publication
Title
Contribution of antibodies against IA-2and zinc transporter 8 to classification of diabetes diagnosed under 40 years of age
Author
Abstract
OBJECTIVE We investigated whether measuring autoantibodies against zinc transporter 8 (ZnT8A) and IA-2β (IA-2βA) may improve classification of new-onset type 1 diabetic patients based on detection of autoantibodies against insulin (IAA), GAD (GADA), and IA-2 (IA-2A). In addition, we studied the correlation of IA-2βA and ZnT8A with other biological and demographic variables. RESEARCH DESIGN AND METHODS Circulating autoantibodies were determined by liquid-phase radiobinding assays from 761 healthy control subjects and 655 new-onset (<1 week insulin) diabetic patients (aged 039 years) with clinical type 1 diabetes phenotype consecutively recruited by the Belgian Diabetes Registry. RESULTS At diagnosis, IA-2βA and ZnT8A prevalences were 41 and 58%, respectively. In IAA-negative, GADA-negative, and IA-2Anegative patients, one IA-2βApositive and eleven ZnT8A-positive individuals were identified at the expense of eight and seven additional positive control subjects (1%), respectively, for each test. ZnT8A or IA-2βA screening increased (P < 0.001; McNemar) the number of patients with ≥2 antibodies both under (from 78 to 87% for ZnT8A and 82% for IA-2βA) and above age 15 (from 51 to 63% for ZnT8A and 56% for IA-2βA) versus 0% in control subjects. IA-2βA and ZnT8A were preferentially associated with IA-2A, and with younger age at diagnosis. Unlike ZnT8A, IA-2βA levels were positively correlated with HLA-DQ8 and negatively with HLA-DQ2. ZnT8A could replace IAA for classification of patients above age 10 without loss of sensitivity or specificity. CONCLUSIONS ZnT8A, and to a lesser degree IA-2βA, may usefully complement GADA, IA-2A, and IAA for classifying insulin-treated diabetes under age 40 years.
Language
English
Source (journal)
Diabetes care. - Alexandria, Va, 1978, currens
Publication
Alexandria, Va : 2011
ISSN
0149-5992 [print]
1935-5548 [online]
Volume/pages
34:8(2011), p. 1760-1765
ISI
000294035400015
Full text (Publisher's DOI)
UAntwerpen
Faculty/Department
Research group
[E?say:metaLocaldata.cgzprojectinf]
BETACELLTHERAPY: Beta Cell Therapy in Diabetes
Prevention of betacelldestruction in type 1 diabetic patients and their high-risk relatives.
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 25.11.2011
Last edited 04.10.2017
To cite this reference