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Selective COX-2 Inhibition Exerts No Negative Effects on Peripheral Blood Lymphocytes in Allergic Asthmatics

Gafvelin, G (author)
Karolinska Institutet
Grundstrom, J (author)
Karolinska Institutet
Grimheden, ME (author)
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Vidaurre, SS (author)
Daham, K (author)
Dahlen, SE (author)
Karolinska Institutet
Dahlen, B (author)
Karolinska Institutet
van Hage, M (author)
Karolinska Institutet
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 (creator_code:org_t)
2016-07-02
2016
English.
In: International archives of allergy and immunology. - : S. Karger AG. - 1423-0097 .- 1018-2438. ; 170:1, s. 57-61
  • Journal article (peer-reviewed)
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  • <b><i>Background:</i></b> Selective inhibition of cyclooxygenase-2 (COX-2) reduces the production of prostaglandin E<sub>2</sub> (PGE<sub>2</sub>), which can have both pro- and anti-inflammatory effects on allergic inflammation. Moreover, in vitro PGE<sub>2</sub> has been shown to affect inflammation through the modulation of lymphocyte responses. <b><i>Methods:</i></b> Sixteen subjects with mild allergic asthma were recruited to a two-period cross-over study: one treatment period with the selective COX-2 inhibitor etoricoxib and one without. Each treatment period ended with an airway challenge with the patient's relevant allergen. Antigen-specific proliferation with the major cat allergen, Fel d 1, was analysed in PBMCs. CD4+ T cells were phenotyped using flow cytometry, and mRNA expression of FOXP3 in anti-CD3-stimulated CD4+ cells were analysed. <b><i>Results:</i></b> No significant impact of in vivo inhibition of COX-2 was detected on the proportion of Th1, Th2, or Treg cells in peripheral blood. Likewise, the treatment had minor effects on the stimulated expression of FOXP3 mRNA in CD4+ T cells. Proliferation of PBMCs to the major cat allergen Fel d 1 was slightly reduced by etoricoxib treatment in cat-allergic patients. <b><i>Conclusions:</i></b> Short-term treatment with the COX-2 inhibitor etoricoxib had a minor impact on T-cell responses, supporting its safe use also in subjects exposed to triggers of lymphocyte activation.

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