title: Protein microarray analysis as a tool for monitoring cellular autoreactivity in type 1 diabetes patients and their relatives.
abstract: BACKGROUND
  Autoreactive T cells have a crucial role in type 1 diabetes (T1D) pathogenesis.
  
  
  OBJECTIVE
  The aim of our study was to monitor the in vitro production of cytokines by peripheral blood mononuclear cells (PBMCs) after stimulation with diabetogenic autoantigens.
  
  
  METHODS
  Ten T1D patients (tested at the time of diagnosis and 6 and 12 months later), 10 first-degree relatives of the T1D patients, and 10 controls underwent the study.
  
  
  METHODS
  PBMCs were stimulated with glutamic acid decarboxylase 65 (GAD65) amino acids (a.a.) 247-279, 509-528, and 524-543; proinsulin a.a. 9-23; and tyrosine phosphatase (islet antigen-2)/R2 a.a. 853-872. Interleukin (IL)-2, IL-4, IL-5, IL-6, IL-10, IL-13, interferon (IFN)-gamma, tumor necrosis factor beta, transforming growth factor beta1, and granulocyte colony-stimulating factor (GCSF) were analyzed by protein microarray.
  
  
  RESULTS
  Differences in cytokine(s) poststimulatory and mainly in basal production were observed in all groups. The most prominent findings were in controls, the higher basal levels of IL-2, IL-4, IL-5, IL-13, and GCSF were observed when compared with relatives (p < 0.05, for all). After stimulation in controls, there was a significant decrease in IL-2, IL-13, GCSF, and IFN-gamma (p < 0.05, for all). The group of relatives was the most variable in poststimulatory production. A strong correlation between cytokines production was found but groups differed in this aspect.
  
  
  CONCLUSIONS
  By multiplex analysis, it may be possible, for example, to define the risk immunological response pattern among relatives or to monitor the immune response in patients on immune modulation therapy.
authors.affiliation: Department of Paediatrics, 2nd Medical Faculty of Charles University, Prague, The Czech Republic.
authors.forename: Zuzana
authors.initials: Z
authors.lastname: Vrabelova
authors.forename: Stanislava
authors.initials: S
authors.lastname: Kolouskova
authors.forename: Kristyna
authors.initials: K
authors.lastname: Böhmova
authors.forename: Maria Karlsson
authors.initials: MK
authors.lastname: Faresjö
authors.forename: Zdenek
authors.initials: Z
authors.lastname: Sumnik
authors.forename: Marta
authors.initials: M
authors.lastname: Pechova
authors.forename: Miloslav
authors.initials: M
authors.lastname: Kverka
authors.forename: Daniel
authors.initials: D
authors.lastname: Chudoba
authors.forename: Klara
authors.initials: K
authors.lastname: Zacharovova
authors.forename: Gabriela
authors.initials: G
authors.lastname: Stadlerova
authors.forename: Pavlina
authors.initials: P
authors.lastname: Pithova
authors.forename: Marie
authors.initials: M
authors.lastname: Hladikova
authors.forename: Katerina
authors.initials: K
authors.lastname: Stechova
mesh_terms: D000293:Adolescent; D000595:Amino Acid Sequence; D001323:Autoantibodies / Q000235:genetics; D002648:Child; D002675:Child, Preschool; D016207:Cytokines / Q000235:genetics*; D003922:Diabetes Mellitus, Type 1 / Q000235:genetics* / Q000276:immunology*; D005190:Family; D005260:Female; D005968:Glutamate Decarboxylase / Q000737:chemistry / Q000235:genetics; D006801:Humans; D007378:Interleukins / Q000235:genetics; D008297:Male; D008969:Molecular Sequence Data; D040081:Protein Array Analysis
chemical_list: D001323:Autoantibodies; D016207:Cytokines; D007378:Interleukins; D005968:Glutamate Decarboxylase; C401141:glutamate decarboxylase 2