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Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs

Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs

Asthma is a chronic respiratory condition for which new therapeutic avenues, including anti-inflammatory drugs like mast cell stabilizers and anti-IgE treatments, continue to be developed.
Mast cell stabilizers, such as cromolyn (also known as sodium cromoglycate) and nedocromil (Tilade), are effective drugs in asthma management. These stabilizers hinder histamine release by skillfully obstructing the activation of mast cells and other cellular entities. Notably, they navigate this task without...

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A Component-resolved Diagnostic Approach for a Study on Grass Pollen Allergens in Chinese Southerners with Allergic Rhinitis and/or Asthma

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Polyethylene glycol-modified ragweed pollen extract in rhinoconjunctivitis.

E F Juniper, R S Roberts, L K Kennedy

The Journal of Allergy and Clinical Immunology

|May 1, 1985

Summary

Polyethylene glycol (PEG)-modified ragweed extract immunotherapy safely increased IgG antibodies in adults with ragweed-induced rhinoconjunctivitis over two years, indicating a potential treatment for hay fever.

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Area of Science:

Immunology
Allergy and Clinical Immunology
Pharmacology

Background:

Ragweed pollen-induced rhinoconjunctivitis is a common allergic condition.
Current treatments for hay fever may have limitations.
Polyethylene glycol (PEG)-modified ragweed extract offers a novel therapeutic approach.

Purpose of the Study:

To evaluate the efficacy and safety of PEG-modified ragweed extract in adults with ragweed-induced rhinoconjunctivitis.
To assess the immunologic response to PEG-modified ragweed extract immunotherapy.

Main Methods:

A 2-year, placebo-controlled study involving 62 ragweed-sensitive adults.
Subjects received weekly injections of PEG-modified ragweed extract or placebo, with stratified dosing based on sensitivity.
Immunological markers, including specific IgG and IgE antibodies, were measured.

Main Results:

PEG-modified ragweed extract stimulated significant increases in ragweed-specific IgG antibodies in both years of the study.
Elevated IgG levels persisted at the start of the second year.
Most injections were well-tolerated, with mild local reactions being most common; systemic symptoms occurred in 4% of injections.

Conclusions:

PEG-modified ragweed extract immunotherapy is safe and immunogenic in adults with ragweed-induced rhinoconjunctivitis.
The treatment effectively increases ragweed-specific IgG antibody levels, suggesting a potential mechanism for allergy desensitization.
Further research may explore long-term efficacy and optimal dosing strategies.