alexa House dust mite-specific T cells in the skin of subjects with atopic dermatitis: frequency and lymphokine profile in the allergen patch test.


Journal of Allergy & Therapy

Author(s): Sager N, Feldmann A, Schilling G, Kreitsch P, Neumann C

Abstract Share this page

Abstract The mechanism underlying positive patch tests with house dust mite-allergen, Dermatophagoides pteronyssinus (Der p), in patients with atopic dermatitis was investigated by isolating T cells from the test sites of two patients. Eighty-five T cell clones (TCC) were established from the epidermis and dermis of lesional skin by the limiting-dilution method with Der p and interleukin (IL)-2. With restimulation assays, 29 of 60 TCCs tested demonstrated specific proliferation; 85\% were of the CD3+, CD2+, and CD4+ phenotype. Der p-specific T cells constituted 0.4\% to 2.7\% of lesional T cells, and they were more frequent in the skin than in the blood of the patients by one order of magnitude. The mitogen-stimulated lymphokine profile of 55 TCCs was assessed; 42\% (11/26) of the allergen-specific TCCs secreted IL-4 but almost no interferon-gamma, as described for the Th2 subset of the mouse. Also, six selected TCCs supported IgE secretion by autologous lymphocytes. Only three of 26 allergen-specific, skin-derived TCCs demonstrated a Th1-like lymphokine profile. These results support the specific nature of Der p-induced patch test lesions in patients with atopic dermatitis, and the results demonstrate also that a considerable proportion of lesional T cells are allergen-specific, IL-4-producing T cells that are capable of enhancing IgE production.
This article was published in J Allergy Clin Immunol and referenced in Journal of Allergy & Therapy

Relevant Expert PPTs

Relevant Speaker PPTs

Recommended Conferences

Relevant Topics

Peer Reviewed Journals
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version