Abstract:
:This study was designed to determine seasonal changes in cytokines, soluble CD23 and specific IgE in the serum of patients with seasonal allergic rhinitis, and the effect of immunotherapy on these seasonal changes. Fifty-four patients with seasonal allergic rhinitis caused by Japanese ceder pollens were divided into a medication group and an immunotherapy group. The patients of the medication group were treated with non-sedating antihistamines alone during the pollen season. The patients of the immunotherapy group had been treated for variable periods (mean, 5.0 +/- 3.2 years) with immunotherapy using japanese cedar pollen antigens. Serum samples were collected before and during the pollen season from each patient, to determine specific IgE, interleukin-4 (IL-4), interferon-gamma (IFN-gamma) and soluble CD23 levels in serum. A significant increase in specific IgE and IL-4 and a significant decrease in IFN-gamma were observed during the pollen season in the medication group. In contrast, in the immunotherapy group, none of specific IgE, IL-4 and IFN-gamma was significantly changed following natural exposure to pollens. However, these effects were not significant in patients undergoing immunotherapy for 3 or fewer years. Seasonal rates of increase in specific IgE and IL-4 differed significantly between good responders and poor responders to immunotherapy, but seasonal rates of decrease in IFN-gamma did not. A seasonal rate of increase in soluble CD23 was significantly correlated with a seasonal rate of increase in specific IgE, in both the medication and the immunotherapy groups. The seasonal rate of increase in soluble CD23 was significantly smaller in the good responders than in the poor responders to immunotherapy. In conclusion, pollen immunotherapy reduces the seasonal increase in specific IgE, IL-4 and soluble CD23 in serum, and in addition switches the seasonal preferential activation of Th-2 cells to reciprocal activation of Th-1 cells with treatment over several years. It is likely that the mechanisms responsible for the clinically beneficial effects of immunotherapy principally involve the modulation of Th-2 rather than Th-1 cytokines.
journal_name
Scand J Immunoljournal_title
Scandinavian journal of immunologyauthors
Ohashi Y,Nakai Y,Kakinoki Y,Ohno Y,Tanaka A,Masamoto T,Sakamoto H,Washio Y,Kato Adoi
10.1046/j.1365-3083.1997.d01-87.xsubject
Has Abstractpub_date
1997-07-01 00:00:00pages
67-77issue
1eissn
0300-9475issn
1365-3083journal_volume
46pub_type
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