Abstract:
:Two cationic proteins, a neutral phosphatase (NP-tase) and a 70-kD protein (p70) were isolated from Staphylococcus aureus by ion exchange chromatography. We compared their properties to those of the well established B cell mitogen of whole, fixed Staph. aureus strain Cowan I cells (SAC). Both purified proteins were able to induce immunoglobulin synthesis in PBMC cultures of healthy donors. NP-tase and p70 also induced immunoglobulin synthesis of PBMC from those patients with CVID who were also responsive to SAC plus IL-2 stimulation. Immunoglobulin synthesis in response to NP-tase and to p70 was time- and dose-dependent and could be inhibited by addition of specific antibodies against the proteins. In contrast to SAC, no addition of exogenous IL-2 was necessary to obtain maximal immunoglobulin synthesis induced by NP-tase or p70. However, neither protein was able to induce immunoglobulin synthesis in B cell-enriched cultures. High amounts of IL-2 were found in supernatants of PBMC from healthy donors following stimulation with low concentrations of NP-tase or p70, and this was associated with vigorous lymphocyte proliferation. Both proteins behave like typical antigens, and not like lectins or superantigens, since an NP-tase-stimulated T cell line showed an antigen-specific, MHC-restricted secondary response. In addition, no preferential T cell receptor V beta chain usage was found with eight V beta-specific MoAb. It is likely that the two proteins induce antigen-specific T cell activation, which is then followed by polyclonal activation of B cells via CD40 receptors and cytokine release.
journal_name
Clin Exp Immunoljournal_title
Clinical and experimental immunologyauthors
Jahreis A,Yousif Y,Rump JA,Dräger R,Vogt A,Peter HH,Schlesier Mdoi
10.1111/j.1365-2249.1995.tb03714.xsubject
Has Abstractpub_date
1995-06-01 00:00:00pages
406-11issue
3eissn
0009-9104issn
1365-2249journal_volume
100pub_type
杂志文章abstract::We have isolated tumour-infiltrating lymphocytes (TIL) clones from a patient with renal cell cancer. The cloning frequency and the effector function were measured. No difference in cloning frequency (r2 = 0.97, frequency = 1:13) was observed between TIL expanded with allogeneic versus autologous feeder cells. Sixty-fo...
journal_title:Clinical and experimental immunology
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journal_title:Clinical and experimental immunology
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journal_title:Clinical and experimental immunology
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journal_title:Clinical and experimental immunology
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journal_title:Clinical and experimental immunology
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journal_title:Clinical and experimental immunology
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journal_title:Clinical and experimental immunology
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doi:
更新日期:1989-04-01 00:00:00
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journal_title:Clinical and experimental immunology
pub_type: 杂志文章
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journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1046/j.1365-2249.2003.02189.x
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journal_title:Clinical and experimental immunology
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doi:
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journal_title:Clinical and experimental immunology
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doi:
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journal_title:Clinical and experimental immunology
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doi:10.1111/j.1365-2249.1992.tb07947.x
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journal_title:Clinical and experimental immunology
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journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
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journal_title:Clinical and experimental immunology
pub_type: 杂志文章
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更新日期:2015-07-01 00:00:00
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journal_title:Clinical and experimental immunology
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journal_title:Clinical and experimental immunology
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journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1983-07-01 00:00:00