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Journal ArticleDOI

Predominant TH2-like bronchoalveolar T-lymphocyte population in atopic asthma

TLDR
Atopic asthma is associated with activation in the bronchi of the interleukin-3, 4, and 5 and GM-CSF gene cluster, a pattern compatible with predominant activation of the TH2-like T-cell population.
Abstract
Background. In atopic asthma, activated T helper lymphocytes are present in bronchial-biopsy specimens and bronchoalveolar-lavage (BAL) fluid, and their production of cytokines may be important in the pathogenesis of this disorder. Different patterns of cytokine release are characteristic of certain subgroups of T helper cells, termed TH1 and TH2, the former mediating delayed-type hypersensitivity and the latter mediating IgE synthesis and eosinophilia. The pattern of cytokine production in atopic asthma is unknown. Methods. We assessed cells obtained by BAL in subjects with mild atopic asthma and in normal control subjects for the expression of messenger RNA (mRNA) for interleukin-2, 3, 4, and 5, granulocytemacrophage colony-stimulating factor (GM-CSF), and interferon gamma by in situ hybridization with 32P-labeled complementary RNA. Localization of mRNA to BAL T cells was assessed by simultaneous in situ hybridization and immunofluorescence and by in situ hybridization after immunomagnetic enrichment or...

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Immunotherapy with Fel d 1 peptides decreases IL-4 release by peripheral blood T cells of patients allergic to cats

TL;DR: The data suggest that peptide immunotherapy may act by shifting the Fel d 1-induced response of PBMCs in vitro from the T(H2)-like to the T (H0)-like phenotype.
Journal ArticleDOI

Airway exposure to bacterial superantigen (SEB) induces lymphocyte-dependent airway inflammation associated with increased airway responsiveness--a model for non-allergic asthma.

TL;DR: The results suggest that the local immune response following mucosal superantigen administration triggers a unique inflammatory response in the airways resembling many features of “intrinsic asthma”.
Journal ArticleDOI

Eotaxin and monocyte chemotactic protein-4 mRNA expression in small airways of asthmatic and nonasthmatic individuals.

TL;DR: There is an increased expression of eotaxin and MCP-4 mRNA within the peripheral airways of lungs of asthmatic subjects, suggesting that these chemokines contribute to the small airways and peripheral lung inflammation in asthma.
Journal Article

Increased bronchoalveolar granulocytes and granulocyte/macrophage colony-stimulating factor during exacerbations of chronic bronchitis

TL;DR: Investigation of airways inflammation in patients with and without an exacerbation of bronchitis found changes in the cell populations in bronchoalveolar lavage of patients consistent with a recruitment of polymorphonuclear leucocytes in the airway lumen might suggest a role for this cytokine in the inflammatory processes of chronic Bronchitis.
References
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Journal ArticleDOI

TH1 and TH2 cells: different patterns of lymphokine secretion lead to different functional properties.

TL;DR: Two types of cloned helper T cells are described, defined primarily by differences in the pattern of lymphokines ynthesized, and the different functions of the two types of cells and their lymphokine synthesis are discussed.
Journal Article

Two types of murine helper T cell clone. I. Definition according to profiles of lymphokine activities and secreted proteins.

TL;DR: A panel of antigen-specific mouse helper T cell clones was characterized according to patterns of lymphokine activity production, and two types of T cell were distinguished.
Journal Article

IL-4 directs the development of Th2-like helper effectors.

TL;DR: The concept that different subsets of helper cells, which correspond roughly to Th1 and Th2 subsets, can develop rapidly in short term culture with respectively low vs high levels of IL-4 support the concept that such distinct phenotypes arise from alternate pathways of differentiation.
Journal ArticleDOI

Homology of cytokine synthesis inhibitory factor (IL-10) to the Epstein-Barr virus gene BCRFI.

TL;DR: The predicted protein sequence shows extensive homology with an uncharacterized open reading frame, BCRFI, in the Epstein-Barr virus genome, suggesting the possibility that this herpes virus exploits the biological activity of a captured cytokine gene to enhance its survival in the host.
Journal ArticleDOI

Mast cell lines produce lymphokines in response to cross-linkage of Fc epsilon RI or to calcium ionophores.

TL;DR: It is shown that cross-linkage of FcεRI on a series of non-transformed murine mast cell lines, or treatment of these cells with calcium ionophores, stimulates increased messenger RNA levels and secretion of a group of lymphokines classically produced by a subset of murine T cell lines (TH2cells).
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