Abstract
Chemokines are cytokines with chemotactic properties on leukocyte subsets whose modulation plays a key role in allergic inflammatory processes. To better understand the possible anti-inflammatory effects of histamine-1 receptor antagonists in allergic asthma, we studied the mRNA expression of a set of chemokines known to be involved in the eosinophils-basophils activation as well as recruitment and T-cell signaling events, before and after corticosteroid or antihistamine treatment in PBMCs from allergic-asthmatic patients ex vivo. Twelve patients were enrolled, all of whom were allergic to Parietaria judaica and suffering for mild persistent asthma: six were treated with desloratadine (10 mg/day), and six with deflazacort (12 mg/day). Before and after the treatment, PBMC samples were collected from each patient and analyzed for the expression of encoding mRNAs for several chemokines, I-309 (CCL1), MCP-1 (CCL2), MIP1-alpha (CCL3), MIP1-beta (CCL4), RANTES (CCL5), IL-8 (CXCL8), IP-10 (CXCL10), Lymphotactin (XCL1). Clinical and functional improvements were seen after 3 weeks of therapy; this was associated with a reduced expression in the mRNA levels for the chemokines RANTES, MIP1-alpha and MIP1-beta with either the corticosteroi...Continue Reading
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