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Related Experiment Videos

Sublingual immunotherapy in Parietaria pollen-induced rhinitis: a double-blind study

C Troise1, S Voltolini, A Canessa

  • 1Department of Allergology, Ospedale San Martino, Genova, Italy.

Journal of Investigational Allergology & Clinical Immunology
|January 1, 1995
PubMed
Summary

High-dose sublingual immunotherapy using Parietaria pollen extract effectively reduced allergic rhinitis symptoms and nasal reactivity in patients. This treatment showed significant improvements with minimal side effects over a 10-month period.

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Area of Science:

  • Allergy and Immunology
  • Otolaryngology
  • Pharmacology

Background:

  • Allergic rhinitis caused by Parietaria pollen affects numerous individuals.
  • Current treatments for allergic rhinitis have limitations.
  • Sublingual immunotherapy (SLIT) offers a potential alternative for allergen desensitization.

Purpose of the Study:

  • To evaluate the efficacy and safety of high-dose sublingual immunotherapy with Parietaria pollen extract.
  • To assess clinical and immunological parameters in patients with Parietaria pollen-induced allergic rhinitis.
  • To investigate the mechanisms underlying sublingual immunotherapy.

Main Methods:

  • A double-blind, placebo-controlled study involving 31 patients.
  • Treatment duration of 10 months with high-dose Parietaria extract (105 BU cumulative dose) via sublingual route.

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  • Assessment of clinical outcomes (symptom-medication scores, nasal reactivity) and immunological markers (IgE, IgG, IgG4).

    • Main Results:

    • Actively treated patients showed significantly lower medication scores during peak pollen season (p < 0.05).
    • Significant reduction in nasal reactivity was observed in the treatment group (p < 0.02).
    • A significant increase in serum specific IgG4 antibodies was noted in treated patients (p = 0.02), with negligible side effects.

    Conclusions:

    • High-dose sublingual immunotherapy with Parietaria pollen extract is effective and safe for treating allergic rhinitis.
    • SLIT may induce tolerance by modulating the immune response, evidenced by increased specific IgG4.
    • Further research into the immunological mechanisms of SLIT is warranted.