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Spontaneous in vitro IgE synthesis: modifications induced by immunotherapy
M D de las Marinas1, M L Sanz, M Ferrer
1Department of Allergology and Clinical Immunology, Faculty of Medicine, University of Navarra, Pamplona, Spain.
Summary
Immunotherapy (IT) significantly reduces in vitro immunoglobulin E (IgE) production in allergic patients, mirroring in vivo serum IgE levels. This decrease, observed from the second year of IT, parallels symptomatic recovery and indicates long-term treatment effectiveness.
Area of Science:
- Immunology
- Allergology
- Clinical Research
Background:
- Allergic diseases are often associated with elevated immunoglobulin E (IgE) levels.
- Immunotherapy (IT) is a treatment aimed at modifying the immune response to allergens.
- Understanding the in vitro correlates of in vivo immunotherapy response is crucial for optimizing treatment.
Purpose of the Study:
- To investigate the correlation between in vitro IgE synthesis by peripheral mononuclear cells (PBMCs) and in vivo serum IgE levels during immunotherapy.
- To assess changes in IgE production in vitro over the course of IT in allergic patients.
Main Methods:
- Peripheral mononuclear cells (PBMCs) were isolated from healthy subjects and allergic patients undergoing IT.
- In vitro IgE synthesis was measured after 7 days of lymphocyte culture.
- Serum IgE levels were assessed using radioimmunoassay.
- Patients were grouped based on the duration of IT.
Main Results:
- Spontaneous in vitro IgE production was significantly higher in allergic patients compared to healthy controls.
- In vitro IgE production decreased progressively during IT, reaching levels similar to controls by the third year.
- A significant positive correlation was observed between serum IgE and in vitro IgE production.
- Symptomatic recovery in patients was associated with these immunological changes.
Conclusions:
- Immunotherapy induces significant changes in lymphocyte IgE production in vitro.
- The observed decrease in IgE synthesis correlates with clinical improvement and long-term IT efficacy.
- In vitro IgE synthesis serves as a valuable marker for monitoring immunotherapy response in allergic diseases.