| pubmed-article:10948105 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:10948105 | lifeskim:mentions | umls-concept:C0021027 | lld:lifeskim |
| pubmed-article:10948105 | lifeskim:mentions | umls-concept:C1704632 | lld:lifeskim |
| pubmed-article:10948105 | lifeskim:mentions | umls-concept:C0871261 | lld:lifeskim |
| pubmed-article:10948105 | lifeskim:mentions | umls-concept:C2911692 | lld:lifeskim |
| pubmed-article:10948105 | lifeskim:mentions | umls-concept:C1706817 | lld:lifeskim |
| pubmed-article:10948105 | lifeskim:mentions | umls-concept:C0456387 | lld:lifeskim |
| pubmed-article:10948105 | lifeskim:mentions | umls-concept:C0205263 | lld:lifeskim |
| pubmed-article:10948105 | lifeskim:mentions | umls-concept:C1707719 | lld:lifeskim |
| pubmed-article:10948105 | lifeskim:mentions | umls-concept:C2828366 | lld:lifeskim |
| pubmed-article:10948105 | lifeskim:mentions | umls-concept:C1705851 | lld:lifeskim |
| pubmed-article:10948105 | lifeskim:mentions | umls-concept:C1515568 | lld:lifeskim |
| pubmed-article:10948105 | lifeskim:mentions | umls-concept:C1555707 | lld:lifeskim |
| pubmed-article:10948105 | lifeskim:mentions | umls-concept:C2752151 | lld:lifeskim |
| pubmed-article:10948105 | lifeskim:mentions | umls-concept:C0321331 | lld:lifeskim |
| pubmed-article:10948105 | pubmed:issue | 9 | lld:pubmed |
| pubmed-article:10948105 | pubmed:dateCreated | 2000-9-8 | lld:pubmed |
| pubmed-article:10948105 | pubmed:abstractText | Infection with the nematode parasite Nippostrongylus brasiliensis induces a pronounced type-2 T-cell response that is associated with marked polyclonal immunoglobulin E (IgE) and IgG1 production in mice. To examine the differential roles of the infection and products produced by nematodes, we investigated a soluble extract of N. brasiliensis for the ability to mediate this type-2 response. We found that the extract induced a marked increase in IgE and IgG1 levels, similar to that induced by the infection. The extract did not affect the level of IgG2a in serum, showing that the effect was specific to IgE and IgG1 (type-2-associated immunoglobulin) rather than inducing a nonspecific increase in all immunoglobulin isotypes. This response was also associated with increased interleukin-4 production in vitro. These results confirm that the extract, like infection, is a strong inducer of polyclonal type-2 responses and a reliable model for investigating the regulation of nematode-induced responses. The extract induced the production of IgG1 when added to in vitro cultures of lipopolysaccharide-stimulated B cells. This provides evidence for the induction of class switch. It did not induce upregulation of IgG1 in naive (unstimulated) B cells or expand B cells in in vitro cultures. Analysis of DNA from the spleens of mice treated with the extract by digestion-circularization PCR demonstrated a marked increase in the occurrence of gamma1 switch region gene recombination in the cells in vivo. These results provide strong evidence that soluble worm products are able to mediate the marked polyclonal gamma1/epsilon response and that infection is not required to mediate this response. Furthermore, these data provide evidence that the soluble nematode extract induces this effect by causing de novo class switch of B cells and not by an expansion of IgG1 B cells or an increase in antibody production by IgG1 plasma cells. | lld:pubmed |
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| pubmed-article:10948105 | pubmed:language | eng | lld:pubmed |
| pubmed-article:10948105 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:10948105 | pubmed:citationSubset | IM | lld:pubmed |
| pubmed-article:10948105 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:10948105 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
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| pubmed-article:10948105 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:10948105 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:10948105 | pubmed:month | Sep | lld:pubmed |
| pubmed-article:10948105 | pubmed:issn | 0019-9567 | lld:pubmed |
