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Dynamics in cytokine responses during the development of occupational sensitization to rats

To cite this article: Krop EJM, van de Pol MA, Lutter R, Heederik DJJ, Aalberse RC, van der Zee JS. Dynamics in cytokine responses during the development of occupational sensitization to rats. Allergy 2010; 65: 1227-1233. Occupational allergy forms an attractive model to study the development of all...

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Published in:Allergy (Copenhagen) 2010-10, Vol.65 (10), p.1227-1233
Main Authors: Krop, E.J.M, van de Pol, M.A, Lutter, R, Heederik, D.J.J, Aalberse, R.C, van der Zee, J.S
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Language:English
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Summary:To cite this article: Krop EJM, van de Pol MA, Lutter R, Heederik DJJ, Aalberse RC, van der Zee JS. Dynamics in cytokine responses during the development of occupational sensitization to rats. Allergy 2010; 65: 1227-1233. Occupational allergy forms an attractive model to study the development of allergic responses, as in some occupations it has a high incidence and develops quickly. In a cohort of starting laboratory animal workers, we previously found 20% sensitization to animal allergens within 2 years. We compared cellular responses of incident laboratory animal workers who developed rat-specific sensitization (cases, n = 18) during 2 years of follow-up to control animal workers matched for atopic status but without sensitization after follow-up (controls, n = 18). Practically, this is a case-control study, nested within the cohort. Rat-specific IgE antibodies were measured in sera, and allergen-specific and nonspecific cytokine responses were measured in whole blood and in isolated peripheral blood mononuclear cells. Self-reported allergic symptoms were related to the presence of rat-specific IgE (P [less-than or equal to] 0.01). Cases developed a rat allergen-specific interleukin (IL)-4 response during sensitization, while controls did not show an increased IL-4 response (at visit D: 33 vs 5 IL-4 producing cells/10⁶ cells, P < 0.001). The IL-4 response was related to the levels of rat-specific IgE in cases (visit D: rho = 0.706, P < 0.001). By contrast, allergen-specific IL-10 and interferon γ (IFNγ) responses as well as nonspecific cytokine responses were comparable between cases and controls. This study is the first to show the development of an allergen-specific IL-4 response in adult human subjects during allergen-specific sensitization. This IL-4 response was quantitatively associated with the development of the specific IgE antibodies. Allergen-specific or nonspecific IL-10 and IFNγ responses showed no protective effect on the development of allergic sensitization.
ISSN:0105-4538
1398-9995
DOI:10.1111/j.1398-9995.2009.02323.x