Monoclonal antibody-based method for measuring olive pollen major allergen Ole e 1

Area of Science:

• Allergen research
• Immunological assays
• Biotechnology

Background:

• Olive tree pollen is a significant cause of inhalant allergies in Mediterranean regions.
• Ole e 1 is the primary allergen, responsible for reactions in over 80% of olive-sensitive individuals.
• Standardization of allergenic products is vital for reliable allergy diagnosis and immunotherapy.

Purpose of the Study:

• To develop a sensitive and specific two-site enzyme-linked immunosorbent assay (ELISA) for quantifying Ole e 1.
• To establish a reliable method for measuring the major allergen content in olive pollen extracts.

Main Methods:

• Monoclonal antibodies were generated against purified natural Ole e 1.
• A capture antibody (5A3) was selected for the ELISA.
• Biotinylated polyclonal rabbit antibody and streptavidin-peroxidase detected bound Ole e 1.

Main Results:

• The developed ELISA demonstrated high reproducibility and sensitivity, with a detection limit of 0.5 ng/mL.
• Ole e 1 content in Olea europaea pollen extracts varied from 3% to 50% of total protein.
• The assay showed good correlation with scanning densitometry and IgE-binding activity, and detected Ole e 1-like proteins in other Oleaceae pollens.

Conclusions:

• The developed Ole e 1 ELISA is a sensitive, reproducible, specific, and reliable method.
• This assay can significantly aid in the standardization of olive pollen extracts for clinical applications.
• Accurate quantification of Ole e 1 is essential for quality control of diagnostic and therapeutic materials.