Allergy Methods and Protocols pp 217-225

Part of the Methods in Molecular Medicine book series (MIMM, volume 138)

Assay of Air Sample Eluates

  • Anne Renström
  • Susan Gordon


After air sampling and elution, the air sample eluate contains an unknown amount of allergens together with other materials. The proteins of interest can be quantified using immunoassays, which are sensitive, economical, and can be used for high throughput. However, the amount of antigen or allergen in an air sample may be very low and consequently the assays must be very sensitive and specific. Immunoassays use antibodies both to capture and visualize the chosen antigen. High specificity and sensitivity can best be achieved by the use of purified, characterized, and specific antibodies.

It is possible to choose between a wide variety of assay setups and reagents. The method described here has been developed for the measurement of airborne rodent allergens. It is a noncompetitive, two-site (sandwich) EIA that utilizes polyclonal antibodies. The detection system uses biotin and streptavidin for increased sensitivity and horseradish peroxidase as the substrate with 3,3′,5,5′-tetramethylbenzidine (TMB) for rapid color development and high sensitivity.

Key Words

Air sampling aeroallergen immunoassay sandwich ELISA streptavidin horseradish peroxidase 

Copyright information

© Humana Press Inc., Totowa, NJ 2008

Authors and Affiliations

  • Anne Renström
    • 1
  • Susan Gordon
    • 2
  1. 1.Lung-och allergiforskningKarolinska InstitutetStockholmSweden
  2. 2.Institute of Occupational MedicineRiccarton, DinburghScotland

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