Protein microarray analysis as a tool for monitoring cellular autoreactivity in type 1 diabetes patients and their relatives.
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.
Vrabelova
Zuzana
Z
Department of Paediatrics, 2nd Medical Faculty of Charles University, Prague, The Czech Republic.
Kolouskova
Stanislava
S
Böhmova
Kristyna
K
Faresjö
Maria Karlsson
MK
Sumnik
Zdenek
Z
Pechova
Marta
M
Kverka
Miloslav
M
Chudoba
Daniel
D
Zacharovova
Klara
K
Stadlerova
Gabriela
G
Pithova
Pavlina
P
Hladikova
Marie
M
Stechova
Katerina
K
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
D001323:Autoantibodies; D016207:Cytokines; D007378:Interleukins; D005968:Glutamate Decarboxylase; C401141:glutamate decarboxylase 2