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The chitinase allergens Der p 15 and Der p 18 from Dermatophagoides pteronyssinus

O'Neil, S., Heinrich, T., Hales, B., Hazell, L., Holt, Deborah, Fischer, K. and Thomas, W. (2006). The chitinase allergens Der p 15 and Der p 18 from Dermatophagoides pteronyssinus. Clinical and Experimental Allergy,36(6):831-839.

Document type: Journal Article
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IRMA ID 10239xPUB12
Title The chitinase allergens Der p 15 and Der p 18 from Dermatophagoides pteronyssinus
Author O'Neil, S.
Heinrich, T.
Hales, B.
Hazell, L.
Holt, Deborah
Fischer, K.
Thomas, W.
Journal Name Clinical and Experimental Allergy
Publication Date 2006
Volume Number 36
Issue Number 6
ISSN 0954-7894   (check CDU catalogue  open catalogue search in new window)
Start Page 831
End Page 839
Total Pages 9
Place of Publication UK
Publisher Blackwell Publishing
HERDC Category C1 - Journal Article (DEST)
Abstract House dust mites Dermatophagoides pteronyssinus and Dermatophagoides farinae cause allergic disease in humans as well as in dogs. In geographical regions where the two mite species coexist, they both elicit specific immunoglobulin (Ig E) responses in humans whereas dogs preferentially react to D. farinae extracts. In dogs the main IgE binding is directed to the D. farinae chitinase allergens Der f 15 and Der f 18 and not to the groups 1 and 2 allergens as found for humans. Although the IgE response of humans to Der f 18 has been investigated there is no report on Der f 15-specific IgE in humans. Objective This study aimed to characterize the chitinase allergens Der p 15 and Der p 18 of D. pteronyssinus and to find out whether they are important allergens for humans. Methods cDNA was cloned by a polymerase chain reaction strategy from D. pteronyssinus libraries using primers based on conserved chitinase sequences. IgE binding to the recombinant polypeptides was measured by immunosorbent assay. Mice were immunized with the polypeptides and cross-reactivity examined. Results Two variants of Der p 15 were isolated, encoding mature proteins of 58.8 and 61.4 kDa. The amino acid sequences had 90% identity to Der f 15. The cDNA for Der p 18 encoded a mature protein of 49.2 kDa with 88% sequence identity to Der f 18. Der p 15-specific IgE was detected in 70% and Der p 18-specific IgE in 63% of a panel of 27 human allergic sera. Conclusions The D. pteronyssinus chitinases Der p 15 and Der p 18 show a high frequency of binding to IgE in allergic human sera. They are therefore potentially important allergens for humans as well as dogs.
Keywords Allergens
Dermatophagoides pteronyssinus
DOI http://dx.doi.org/10.1111/j.1365-2222.2006.02497.x   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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