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Sökning: (WFRF:(Gaga M)) > (2005-2009)

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  • Gaga, M, et al. (författare)
  • Evaluation and management of severe asthma
  • 2007
  • Ingår i: Current medicinal chemistry. - : Bentham Science Publishers Ltd.. - 0929-8673. ; 14:9, s. 1049-1059
  • Tidskriftsartikel (refereegranskat)
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3.
  • Bossios, Apostolos, 1969, et al. (författare)
  • IL-5 expression and release from human CD34 cells in vitro; ex vivo evidence from cases of asthma and Churg-Strauss syndrome.
  • 2009
  • Ingår i: Allergy. - : Wiley. - 1398-9995 .- 0105-4538. ; :Nov 26
  • Tidskriftsartikel (refereegranskat)abstract
    • To cite this article: Bossios A, Sjöstrand M, Dahlborn A-K, Samitas K, Malmhäll C, Gaga M, Lötvall J. IL-5 expression and release from human CD34 cells in vitro; ex vivo evidence from cases of asthma and Churg-Strauss syndrome. Allergy 2009. DOI: 10.1111/j.1398-9995.2009.02271.x.Abstract Background: Eosinophils develop from hematopoietic CD34(+) progenitor cells in the bone marrow (BM) under the influence of Interleukin-5 (IL-5). The primary source of IL-5 is T-lymphocytes, although other sources may exist. The aims of this study were to determine whether CD34(+) cells from human peripheral blood (PB) and BM have the capacity to produce IL-5 when stimulated in vitro, and secondly, whether an elevated number of IL-5-producing CD34(+) cells can be found in situ in ongoing eosinophilic disease. Methods: CD34(+) cells from PB and BM were stimulated in vitro, and IL-5 production and release was assessed by ELISA, ELISPOT, flow cytometry and immunocytochemistry. Blood and BM from a patient with Churg-Strauss syndrome were analyzed by flow cytometry for CD34(+)/IL-5(+) cells, and immunohistochemical staining of CD34(+)/IL-5(+) cells in bronchial biopsies from an asthmatic patient was performed. Results: Both PB and BM CD34(+) cells can produce and release IL-5 when stimulated in vitro. In the Churg-Strauss patient, IL-5-producing CD34(+) cells were found in PB and BM. Oral glucocorticoid treatment markedly decreased the number of IL-5-positive CD34 cells in the BM. CD34(+)/IL-5(+) cells were present in a patient with asthma. Conclusion: CD34(+) cells in blood and BM are capable of producing IL-5 both in vitro and in vivo in humans, arguing that these cells may have the capacity to contribute to eosinophilic inflammation. Consequently, targeting CD34(+) progenitor cells that produce and release IL-5 may be effective in reducing the mobilization of eosinophil lineage-committed cells in eosinophilic-driven diseases.
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