Comparison of enzyme immunoassay-based assays for environmental Alternaria alternata.
Document Type
Article
Publication Date
9-2006
Identifier
DOI: 10.1016/S1081-1206(10)60800-9; PMCID: PMC1876741
Abstract
BACKGROUND: Alternaria alternata-derived allergenic materials are causes of human disease. Several immunoassays exist to quantify these materials.
OBJECTIVE: To compare methods for evaluating Alternaria content.
METHODS: Four methods, including 1 monoclonal antibody (MAb)-based assay specific for recombinant Alt a 1, 1 MAb-based assay for chromatographically purified Alt a 1, 1 polyclonal antibody (PAb)-based assay for chromatographically purified Alt a 1, and 1 PAb-based assay for whole Alternaria extract, were evaluated. Environmental samples collected as part of the National Survey of Lead and Allergens in Housing were examined. Alternaria spore counts were determined in dust by observation.
RESULTS: The MAb-based assay for recombinant Alt a 1 detected Alternaria in few samples (25%); the PAb-based assay for whole Alternaria proteins detected antigen in 97% of the samples. The PAb- and MAb-based assays for purified Alt a 1 detected antigen in 100% of the samples. There was a significant positive correlation between the 2 assays directed against purified Alt a 1. There was a positive correlation between the PAb-based assay for whole Alternaria and the PAb-based assay for Alt a 1. Nearly all the dust samples contained Alternaria spores, and there was a strong positive correlation between counts and all assays.
CONCLUSION: Because of the multifaceted nature of Alternaria, the disparities between methods for quantifying Alternaria, the cross-reactivity between fungal allergens, and the documented genetic promiscuity of this fungus, enzyme immunoassays using PAbs against a range of Alternaria proteins will probably produce the most reliable estimation of overall Alternaria exposure in house dust.
Journal Title
Annals of allergy, asthma & immunology : official publication of the American College of Allergy, Asthma, & Immunology
Volume
97
Issue
3
First Page
350
Last Page
356
MeSH Keywords
Air Pollutants; Allergens; Alternaria; Antibodies, Monoclonal; Antigens, Fungal; Cross Reactions; Humans; Immunoenzyme Techniques; Spores
Keywords
Air Pollutants; Allergens; Alternaria; Antibodies, Monoclonal; Antigens, Fungal; Cross Reactions; Humans; Immunoenzyme Techniques; Spores
Recommended Citation
Barnes C, Portnoy J, Sever M, Arbes S Jr, Vaughn B, Zeldin DC. Comparison of enzyme immunoassay-based assays for environmental Alternaria alternata. Ann Allergy Asthma Immunol. 2006;97(3):350-356. doi:10.1016/S1081-1206(10)60800-9
COinS
Comments
Grant support