Immune system alterations in patients with inflammatory bowel disease during remission.
OBJECTIVE
Perturbed immune homeostasis elicited by misbalanced production of proinflammatory and anti-inflammatory cytokines is characteristic of inflammatory bowel disease. The aim of this study was to evaluate cytokine profile in patients with different forms of inflammatory bowel disease - ulcerative colitis and Crohn's disease - during clinical remission phase.


METHODS
Production of proinflammatory Th1 cytokines (tumor necrosis factor-alpha (TNF-alpha), interferon-gamma (IFN-gamma)) and anti-inflammatory Th2 cytokines (interleukin-10 (IL-10) and interleukin-13 (IL-13)) was analyzed in peripheral blood mononuclear cells of patients with inflammatory bowel disease (9 with ulcerative colitis and 9 with Crohn's disease) and control subjects (n=11) by enzyme-linked immunosorbent assay (two-site ELISA).


RESULTS
The results of the study revealed that the level of TNF-alpha after stimulation with phytohemagglutinin in patients with Crohn's disease was significantly higher in comparison to both patients with ulcerative colitis and controls (P<0.001 and P<0.01, respectively). The secretion of IFN-gamma both in patients with Crohn's disease and ulcerative colitis was lower than that in controls (P=0.05 and P<0.01, respectively), but it normalized after stimulation with phytohemagglutinin. The levels of IL-10 and IL-13 were significantly (P<0.01) higher in patients with Crohn's disease than in patients with ulcerative colitis and control group before and after stimulation with phytohemagglutinin.


CONCLUSIONS
The results of our study provide evidence that in patients with inflammatory bowel disease, the imbalance between production of proinflammatory Th1 and anti-inflammatory Th2 cytokines persists even during remission of the disease, and disturbances of immune homeostasis are significantly more expressed in patients with Crohn's disease than in patients with ulcerative colitis.
Sventoraityte
Jurgita
J
Department of Gastroenterology, Kaunas University of Medicine, Kaunas, Lithuania.
Zvirbliene
Aida
A
Kiudelis
Gediminas
G
Zalinkevicius
Rimantas
R
Zvirbliene
Aurelija
A
Praskevicius
Antanas
A
Kupcinskas
Limas
L
Tamosiūnas
Vytas
V
D000328:Adult; D000368:Aged; D002478:Cells, Cultured / Q000276:immunology; D003093:Colitis, Ulcerative / Q000276:immunology; D003424:Crohn Disease / Q000276:immunology; D016207:Cytokines / Q000276:immunology*; D003627:Data Interpretation, Statistical; D005260:Female; D006706:Homeostasis; D006801:Humans; D015212:Inflammatory Bowel Diseases / Q000276:immunology*; D007371:Interferon-gamma / Q000276:immunology; D016753:Interleukin-10 / Q000276:immunology; D008297:Male; D008875:Middle Aged; D012074:Remission Induction; D018417:Th1 Cells / Q000276:immunology; D018418:Th2 Cells / Q000276:immunology; D014409:Tumor Necrosis Factor-alpha / Q000276:immunology
D016207:Cytokines; D014409:Tumor Necrosis Factor-alpha; D016753:Interleukin-10; D007371:Interferon-gamma