| pubmed-article:10540153 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:10540153 | lifeskim:mentions | umls-concept:C0026336 | lld:lifeskim |
| pubmed-article:10540153 | lifeskim:mentions | umls-concept:C0003320 | lld:lifeskim |
| pubmed-article:10540153 | lifeskim:mentions | umls-concept:C0155877 | lld:lifeskim |
| pubmed-article:10540153 | lifeskim:mentions | umls-concept:C0178602 | lld:lifeskim |
| pubmed-article:10540153 | lifeskim:mentions | umls-concept:C1280500 | lld:lifeskim |
| pubmed-article:10540153 | lifeskim:mentions | umls-concept:C0591833 | lld:lifeskim |
| pubmed-article:10540153 | pubmed:issue | 1 | lld:pubmed |
| pubmed-article:10540153 | pubmed:dateCreated | 1999-11-19 | lld:pubmed |
| pubmed-article:10540153 | pubmed:abstractText | The dose of antigen is assumed to be one of the important factors in the polarized development of helper T cell subsets, i.e. Th1 or Th2 cells. We investigated the effect of the sensitizing antigen dose in a murine model of atopic asthma, which involved sensitization with ovalbumin (OVA) followed by repeated exposure to OVA aerosols. BALB/c mice were primed with varying doses of OVA (0, 10, 100 and 1000 microg) plus Al(OH)3 on days 0, 7 and 14, and were challenged with OVA aerosols (50 mg/ml for 20 min) on days 15-20. There were striking antigen dose-related differences in OVA-specific antibodies: high IgE and low IgG2a titres were found in mice sensitized at 10 microg, while low IgE and high IgG2a titres were seen at 1000 microg. The sensitizing dose was inversely correlated with the total cell count and the eosinophil count in bronchoalveolar lavage fluid (BALF), as well as with the extent of histological changes such as goblet cell hyperplasia of the bronchial epithelium and cellular infiltration into bronchovascular bundles. Antigen-induced bronchial hyper-responsiveness (BHR) to methacholine was observed with sensitization at 10 microg but not at 1000 microg. Splenic mononuclear cells (SMNC) obtained from mice sensitized at either dose showed proliferation in response to OVA. Production of IL-4 and IL-5 by OVA-stimulated SMNC was inversely correlated with the dose of sensitizing antigen. High-dose sensitization resulted in general suppression of cytokine production by SMNC, including interferon-gamma (IFN-gamma). The BALF levels of IL-4 and IL-5 were increased by low-dose sensitization, whereas IFN-gamma and IL-12 levels were increased by high-dose sensitization. These results suggest that the dose of sensitizing antigen defines the phenotypic changes in the present murine asthma model, presumably by influencing the pattern of cytokine production. | lld:pubmed |
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| pubmed-article:10540153 | pubmed:language | eng | lld:pubmed |
| pubmed-article:10540153 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:10540153 | pubmed:citationSubset | IM | lld:pubmed |
| pubmed-article:10540153 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
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| pubmed-article:10540153 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:10540153 | pubmed:month | Oct | lld:pubmed |
| pubmed-article:10540153 | pubmed:issn | 0009-9104 | lld:pubmed |
| pubmed-article:10540153 | pubmed:author | pubmed-author:HiwadaKK | lld:pubmed |
| pubmed-article:10540153 | pubmed:author | pubmed-author:YokoyamaAA | lld:pubmed |
| pubmed-article:10540153 | pubmed:author | pubmed-author:SakaiKK | lld:pubmed |
| pubmed-article:10540153 | pubmed:author | pubmed-author:KohnoNN | lld:pubmed |
| pubmed-article:10540153 | pubmed:issnType | Print | lld:pubmed |
| pubmed-article:10540153 | pubmed:volume | 118 | lld:pubmed |
| pubmed-article:10540153 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:10540153 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:10540153 | pubmed:pagination | 9-15 | lld:pubmed |
| pubmed-article:10540153 | pubmed:dateRevised | 2009-11-18 | lld:pubmed |
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| pubmed-article:10540153 | pubmed:year | 1999 | lld:pubmed |
| pubmed-article:10540153 | pubmed:articleTitle | Effect of different sensitizing doses of antigen in a murine model of atopic asthma. | lld:pubmed |
| pubmed-article:10540153 | pubmed:affiliation | 2nd Department of Internal Medicine, Ehime University, Ehime, Japan. | lld:pubmed |
| pubmed-article:10540153 | pubmed:publicationType | Journal Article | lld:pubmed |
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