Abstract:
:Primary proliferative T cell responses require stimulation with antigen-pulsed dendritic cells (Ag-DC). Here we show that for optimal stimulation, dendritic cells (DC) not exposed directly to antigen are also required. Ag-DC added to DC-depleted T cells caused negligible primary stimulation; adding back DC resulted in stimulation. These effects were seen using the contact sensitizer fluorescein isothiocyanate (FITC), FITC conjugated to ovalbumin (FITC-OVA) or influenza virus as antigens. DC co-cultured with Ag-DC (using FITC or FITC-OVA) acquired antigen indicating that antigen was transferred between DC. DC that acquired antigen secondarily were separated by cell sorting and stimulated primary T cell proliferation directly. DC were also pulsed with FITC, washed thoroughly and incubated overnight. Supernatants contained shed antigen since DC incubated in these supernatants acquired antigen as indicated by flow cytometry. DC acquiring the shed antigen also stimulated T cell proliferation although the stimulation was not as effective as that seen when cell contact between DC and antigen-bearing DC occurred. Thus, in primary stimulation, activation of T cells may occur when there is an antigen gradient between Ag-DC and DC and the mechanisms underlying these effects are now being sought. We propose that this unique interaction between antigen-presenting cells may be a paradigm for self/non-self discrimination.
journal_name
Eur J Immunoljournal_title
European journal of immunologyauthors
Knight SC,Iqball S,Roberts MS,Macatonia S,Bedford PAdoi
10.1002/(SICI)1521-4141(199805)28:05<1636::AID-IMMsubject
Has Abstractpub_date
1998-05-01 00:00:00pages
1636-44issue
5eissn
0014-2980issn
1521-4141pii
10.1002/(SICI)1521-4141(199805)28:05<1636::AID-IMMjournal_volume
28pub_type
杂志文章abstract::Changes in endothelial permeability are crucial in the pathogenesis of many diseases. Adenosine is one of the endogenous mediators controlling endothelial permeability under normal conditions, and an endothelial cell surface enzyme CD73 is a key regulator of adenosine production. Here we report that IFN-beta is a nove...
journal_title:European journal of immunology
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abstract::Co-infection of HCV with HIV has been associated with more rapid progression of HCV-related disease. HCV-specific T-cell immune responses, which are essential for disease control, are attenuated in co-infection with HIV. T-cell exhaustion has recently been implicated in the deficient control of chronic viral infection...
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
pub_type: 评论,杂志文章
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journal_title:European journal of immunology
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doi:10.1002/eji.1830150405
更新日期:1985-04-01 00:00:00
abstract::The number of patients with severe atopic dermatitis (AD) has been on the rise recently. We are therefore urgently in need of a treatment that can suppress Th2 cell-mediated responses in an Ag-specific fashion. Oligodeoxynucleotides (ODN)containing CpG motifs (CpG ODN) have been highlighted as immunomodulators that re...
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journal_title:European journal of immunology
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doi:10.1002/(SICI)1521-4141(199908)29:08<2464::AID-IMM
更新日期:1999-08-01 00:00:00
abstract::The MRC OX-47 monoclonal antibody recognizes a membrane antigen present at low levels on many lymphocytes but whose expression is markedly increased on activation with mitogens. cDNA clones for the OX-47 antigen were isolated from an expression library and the protein sequence deduced. It contains a leader sequence gi...
journal_title:European journal of immunology
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doi:10.1002/eji.1830210320
更新日期:1991-03-01 00:00:00
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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更新日期:2002-10-01 00:00:00
abstract::The cell surface molecule CD44, thought to be a cell surface receptor for hyaluronic acid, is expressed by thymocytes and peripheral T cells. Following T cell activation with mitogens or antigens, surface expression of CD44 increases. This increase in CD44 cell surface expression has been used as a means of identifyin...
journal_title:European journal of immunology
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journal_title:European journal of immunology
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更新日期:1996-05-01 00:00:00
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journal_title:European journal of immunology
pub_type: 评论,杂志文章
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更新日期:2013-04-01 00:00:00
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journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830170305
更新日期:1987-03-01 00:00:00
abstract::Experimental autoimmune encephalomyelitis, an experimental murine model for multiple sclerosis, is induced by stimulation of myelin-specific T lymphocytes. Myelin oligodendrocyte glycoprotein (MOG), a minor component of myelin proteins, is a potent autoantigen which contributes extensively to the anti-myelin response....
journal_title:European journal of immunology
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更新日期:2006-03-01 00:00:00