TY - JOUR
T1 - Involvement of interleukin-4 and -10 in inflammatory bowel disease
AU - Nielsen, O H
AU - Køppen, T
AU - Rüdiger, N
AU - Horn, T
AU - Eriksen, J
AU - Kirman, I
PY - 1996/9
Y1 - 1996/9
N2 - The pathogenesis of ulcerative colitis (UC) and Crohn's disease (CD) may be associated with a decreased production of cytokines suppressing macrophage and T-cell functions: interleukins (IL) -4 and IL-10. Serum concentrations of IL-4 and IL-10 were measured using an ELISA technique, and intestinal IL-4 and IL-10 mRNA was detected by a reverse transcriptase polymerase chain reaction (RT-PCR) in 34 patients with inflammatory bowel disease (IBD) (20 with UC and 14 with CD) and compared to 12 control subjects. The superoxide production was measured spectrophotometrically in activated PMNs initially incubated in the presence of IL-4 or IL-10. No differences were found in numbers of cells that might be potential IL-4 or IL-10 producers (T cells, macrophages, B cells, and mast cells) in biopsy specimens using immuno- and histochemistry. IL-4 mRNA was detectable in specimens from 77.8% of the UC patients (P > 0.05) and 0% of the CD patients (P < 0.05), as compared to 81.8 in controls, and was significantly different (P < 0.0001) between UC and CD patients. The IL-10 amplification product was detectable in specimens from 30.0% UC patients (P < 0.003), but not in CD patients (78.6%, P > 0.05) as compared to controls (91.7%). The circulating protein levels of IL-4 were below the detection limit in all groups (detection limit 4 pg/ml), while the median IL-10 concentration was 12.5 pg/ml in UC, 18.1 pg/ml in CD, and 19.5 pg/ml among controls (detection limit 3 pg/ml), which did not differ in any of the three groups (P > 0.05). Finally, the superoxide production was inhibited and delayed by the addition of IL-10 (P < 0.01), whereas IL-4 only delayed this parameter. In conclusion, apart from the well-known suppressive effect on proinflammatory cytokine production, IL-4 delays and IL-10 inhibits superoxide generation. IL-4 mRNA expression is decreased in intestinal tissue from CD patients, while IL-10 mRNA expression is decreased in majority of UC patients, suggesting different immunopathogenesis of the two diseases.
AB - The pathogenesis of ulcerative colitis (UC) and Crohn's disease (CD) may be associated with a decreased production of cytokines suppressing macrophage and T-cell functions: interleukins (IL) -4 and IL-10. Serum concentrations of IL-4 and IL-10 were measured using an ELISA technique, and intestinal IL-4 and IL-10 mRNA was detected by a reverse transcriptase polymerase chain reaction (RT-PCR) in 34 patients with inflammatory bowel disease (IBD) (20 with UC and 14 with CD) and compared to 12 control subjects. The superoxide production was measured spectrophotometrically in activated PMNs initially incubated in the presence of IL-4 or IL-10. No differences were found in numbers of cells that might be potential IL-4 or IL-10 producers (T cells, macrophages, B cells, and mast cells) in biopsy specimens using immuno- and histochemistry. IL-4 mRNA was detectable in specimens from 77.8% of the UC patients (P > 0.05) and 0% of the CD patients (P < 0.05), as compared to 81.8 in controls, and was significantly different (P < 0.0001) between UC and CD patients. The IL-10 amplification product was detectable in specimens from 30.0% UC patients (P < 0.003), but not in CD patients (78.6%, P > 0.05) as compared to controls (91.7%). The circulating protein levels of IL-4 were below the detection limit in all groups (detection limit 4 pg/ml), while the median IL-10 concentration was 12.5 pg/ml in UC, 18.1 pg/ml in CD, and 19.5 pg/ml among controls (detection limit 3 pg/ml), which did not differ in any of the three groups (P > 0.05). Finally, the superoxide production was inhibited and delayed by the addition of IL-10 (P < 0.01), whereas IL-4 only delayed this parameter. In conclusion, apart from the well-known suppressive effect on proinflammatory cytokine production, IL-4 delays and IL-10 inhibits superoxide generation. IL-4 mRNA expression is decreased in intestinal tissue from CD patients, while IL-10 mRNA expression is decreased in majority of UC patients, suggesting different immunopathogenesis of the two diseases.
KW - Adult
KW - Aged
KW - Base Sequence
KW - Biopsy
KW - Case-Control Studies
KW - Colitis, Ulcerative/immunology
KW - Colon/immunology
KW - Colonic Diseases, Functional/immunology
KW - Crohn Disease/immunology
KW - Female
KW - Humans
KW - Interleukin-10/analysis
KW - Interleukin-4/analysis
KW - Male
KW - Middle Aged
KW - Molecular Sequence Data
KW - Neutrophils/metabolism
KW - RNA, Messenger/analysis
KW - Superoxides/metabolism
M3 - Journal article
C2 - 8794795
SN - 0163-2116
VL - 41
SP - 1786
EP - 1793
JO - Digestive Diseases and Sciences
JF - Digestive Diseases and Sciences
IS - 9
ER -