These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Phenotype of cells expressing mRNA for TH2-type (interleukin 4 and interleukin 5) and TH1-type (interleukin 2 and interferon gamma) cytokines in bronchoalveolar lavage and bronchial biopsies from atopic asthmatic and normal control subjects.
    Author: Ying S, Durham SR, Corrigan CJ, Hamid Q, Kay AB.
    Journal: Am J Respir Cell Mol Biol; 1995 May; 12(5):477-87. PubMed ID: 7742012.
    Abstract:
    We investigated the phenotype of cells expressing messenger RNA encoding interleukin 4 (IL-4), IL-5, IL-2, and interferon gamma (IFN-gamma) in bronchoalveolar lavage (BAL) and bronchial biopsies (BX) from seven mild atopic asthmatic patients and nine nonasthmatic controls. Immunocytochemistry followed by in situ hybridization using either 35S- or digoxigenin-labeled riboprobes was performed on cytospins from BAL and BX, respectively. With BAL or BX, in situ hybridization alone showed significant increases in percentages of IL-2, IL-4, and IL-5 mRNA+ cells when asthmatics were compared to nonasthmatic controls. Double immunocytochemistry-in situ hybridization revealed that > 70% of IL-4 and IL-5 mRNA+ cells were activated T cells (CD3+). The remaining IL-4 and IL-5 mRNA+ signals were colocalized to tryptase+ mast cells, and activated eosinophils (EG2+). Rare IL-4 and IL-5 mRNA+ cells were observed in nonasthmatic controls, the majority being CD3+ cells, as were IL-2 and IFN-gamma mRNA+ cells (in both asthmatics and controls). A few IL-4 (< 8%) and IL-5 (< 5%) mRNA+ signals did not colocalize with any of the cells identified by immunocytochemistry. Thus, we provide further evidence that CD3+ T cells are the most abundant cells expressing IL-4 and IL-5 mRNA in BAL and BX from allergic asthma. Fewer, but detectable, numbers of tryptase+ mast cells and EG2+ eosinophils also expressed these transcripts.
    [Abstract] [Full Text] [Related] [New Search]