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Interleukin-10 and interleukin-5 balance in patients with active asthma, those in remission, and healthy controls
Minako Tomiita1, Eduardo Campos-Alberto1, Masayuki Shima2
1Department of Pediatrics, Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan.
Background:
The immunological mechanisms of asthma remission remain unclear although several reports have suggested that balance between T helper (Th) 2 cytokines and regulatory cytokines is related.
Objective:
To study the balance between interleukin (IL) 10 and IL-5 in asthma clinical remission.
Methods:
We measured the numbers of IL-5 and IL-10 producing cells in peripheral blood mononuclear cells stimulated with mite antigen obtained from patients with active asthma (group A, n = 18), patients in clinical remission (group R, n = 15) and nonatopic healthy controls (group H, n = 14).
Results:
The numbers of IL-5 producing cells in groups A and R were significantly higher than in group H. The number of IL-5 producing cells was lower in group R than in group A, although the difference was not statistically significant. The number of IL-10 producing cells was higher in group R than in group A, although again the difference was not statistically significant. There was a significant difference in the number of IL-10 producing cells between groups A and H but not between groups R and H. The ratio of the number of IL-10 to IL-5 producing cells was highest in group H followed by groups R and A, and the differences were statistically significant for each pair of groups.
Conclusion:
Our study suggests that the IL-10/IL-5 balance is related to clinical asthma. The balance differs between patients in clinical remission and healthy controls, suggesting that allergic inflammation may continue even after clinical asthma remission.
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