Abstract:
:Targeting exogenous antigen into the MHC class I-restricted presentation pathway is a prerequisite for the induction of cytotoxic T lymphocytes (CTL) which have been shown to represent an important component of the protective and therapeutic immune response to viral infections and tumors. In this study, we produced recombinant proteins composed of the receptor-binding non-toxic B-fragment of bacterial Shiga toxin derived from Shigella dysenteriae associated with an epitope from a model tumor antigen, Mage 1. We show that Shiga B-Mage 1 fusion proteins carrying an active or inactive endoplasmic reticulum retrieval signal (the C-terminal peptides KDEL or KDELGL, respectively) could be presented by peripheral blood mononuclear cells in an MHC class I-restricted manner to Mage 1-specific CTL. After pulsing B lymphoblastoid cells or dendritic cells with Shiga B-Mage 1 fusion protein, activation of the MHC class I-restricted Mage 1-specific CTL was also demonstrated. In further analysis, we showed that treatment with brefeldin A or paraformaldehyde fixation of Epstein-Barr virus-transformed B cells prevented the presentation of the Mage 1 T cell epitope, which excluded extracellular processing of the antigen. Immunofluorescence analysis also revealed that the Shiga B-Mage 1 fusion protein was largely excluded from Lamp-2-positive lysosomal structures. Therefore, the ability of Shiga toxin B-fragment to target dendritic cells and B cells and to direct antigen into the exogenous class I-restricted pathway makes it an attractive non-living and non-toxic vaccine vector.
journal_name
Eur J Immunoljournal_title
European journal of immunologyauthors
Lee RS,Tartour E,van der Bruggen P,Vantomme V,Joyeux I,Goud B,Fridman WH,Johannes Ldoi
10.1002/(SICI)1521-4141(199809)28:09<2726::AID-IMMsubject
Has Abstractpub_date
1998-09-01 00:00:00pages
2726-37issue
9eissn
0014-2980issn
1521-4141pii
10.1002/(SICI)1521-4141(199809)28:09<2726::AID-IMMjournal_volume
28pub_type
杂志文章abstract::Atopic dermatitis (AD) or eczema is the most common chronic inflammatory skin disease. It is a multifactorial disease with local and systemic immune changes. Current therapies focus on restoring the local skin barrier or inhibiting immune responses. In this issue of the European Journal of Immunology, Sehra et al. [Eu...
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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journal_title:European journal of immunology
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journal_title:European journal of immunology
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doi:10.1002/eji.1830051002
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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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abstract::The role of redox regulation in immune-mediated arthritis has been previously described. However, the relationship between innate immune cells, including innate lymphoid cells (ILCs) and phagocyte-derived ROS, in this process remains unclear. Here, we characterize ILCs and measure the IL-1 family cytokines along with ...
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abstract::It is widely believed that DC, but not macrophages, prime naïve T cells in vivo. Here, we investigated the ability of CD68-expressing cells (commonly defined as macrophages) in priming autoreactive T cells and initiating collagen-induced arthritis (CIA) in the mouse. For this purpose, a transgenic mouse was developed ...
journal_title:European journal of immunology
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abstract::Here we demonstrate that components of the entire complement cascade are fixed on the surface of erythrocytes infected with the human malarial parasite Plasmodium falciparum. Despite the activation of lytic complement factors, no complement-mediated lysis of P. falciparum-infected erythrocytes occurred only in the abs...
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journal_title:European journal of immunology
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abstract::Dendritic cells (DC) play the dual task of initiating cellular immunity against potentially harmful foreign antigens (Ag), while maintaining immunological tolerance to self-Ag and environmental Ag. As an approach to induce Ag-specific suppression, we and others introduced CD95 ligand (L) cDNA into DC. The resulting "k...
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