| Autor: |
Zweiman, B., Valenzano, M., Atkins, P.C., Tanus, T., Getsy, J.A. |
| Zdroj: |
The Journal of Allergy and Clinical Immunology; July 1996, Vol. 98 Issue: 1 p89-98, 10p |
| Abstrakt: |
Background: The serum histamine-releasing activity (HRA) found in a sizable percentage of patients with chronic idiopathic urticaria (CIU) has been partially characterized. However, the variable effect of individual HRA^+ sera in basophils of different donors and the relationship of HRA to the clinical course require further investigation. Objective: The study was performed to characterize the HRA found in sera of some members of a sizable group of carefully evaluated patients with CIU. Methods: Sera of 70 patients with CIU, evaluated with a standard protocol, were screened for increased HRA. HRA^+ sera were fractionated, heated, and tested on unaltered and altered basophils obtained from a panel of normal donors. HRA levels were compared with concomitant clinical manifestations. Results: HRA^+ sera were found in 30% of our patients with CIU. HRA was predominantly in the IgG fraction, sensitive to 56^o C heating for 4 hours, and generally reacted more with IgE-stripped basophils. Considerable variation in the degree of response to HRA^+ sera in the basophils of different normal subjects did not correlate with the degree of response of these cells to heterologous anti-IgE antiserum. Serum HRA levels were generally much lower when symptoms decreased in these patients with CIU. Conclusion: Serum HRA from patients with CIU appears to bind most commonly to the IgE receptor and may be a marker of clinical disease activity. HRA appears in an IgG-containing fraction of the serum and may contain IgE in some cases. (J ALLERGY CLIN IMMUNOL 1996;98:89-98.) |
| Databáze: |
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