The Effect of Broccoli Sprout Extract on Seasonal Grass Pollen-Induced Allergic Rhinitis

Area of Science:

• Environmental Health
• Immunology
• Nutritional Science

Background:

• Exposure to environmental pollutants exacerbates allergic rhinitis.
• Antioxidant treatments show potential for managing allergic rhinitis symptoms.

Purpose of the Study:

• To investigate the efficacy of broccoli sprout extract (BSE) supplementation in patients with grass-induced allergic rhinitis.
• To evaluate the combined effects of BSE and nasal corticosteroid therapy on allergic rhinitis outcomes.

Main Methods:

• 47 patients with grass-induced allergic rhinitis were randomized into four groups receiving nasal steroid spray or saline spray with either BSE or placebo.
• Intervention lasted 3 weeks, with assessments including Peak Nasal Inspiratory Flow (PNIF), Total Nasal Symptoms Scores (TNSS), and nasal mucus cytokine levels.
• Objective and subjective measures were compared before and after the intervention period.

Main Results:

• Combining nasal corticosteroid with BSE demonstrated the most significant improvement in objective measures like PNIF.
• PNIF showed significant improvement at multiple time points post-nasal challenge in groups receiving nasal steroid spray compared to placebo.
• While TNSS showed some statistical significance, cytokine levels did not exhibit significant changes post-intervention.

Conclusions:

• Broccoli sprout extract (BSE) in conjunction with nasal corticosteroids offers significant benefits for objective measures in grass-induced allergic rhinitis.
• The study highlights the potential of BSE as an adjunctive therapy for allergic rhinitis.
• Further research into cytokine modulation by BSE may be warranted.