Abstract:
:In general, exogenous proteins are processed by antigen-presenting cells in the endosomes for major histocompatibility complex (MHC) class II presentation to CD4+ T cells, while proteins synthesized endogenously are processed in the cytoplasm for MHC class I presentation to CD8+ T cells. However, it is recognized that exogenous proteins can be processed for MHC class I presentation also, and evidence in favour of alternatives to the conventional MHC class I processing and presentation pathway is accumulating. Here, we show that exogenous recombinant influenza A virus nucleoprotein (rNP) is processed for MHC class I presentation to CD8+ cytotoxic T lymphocytes (CTL) by EBV-transformed, B-lymphoblastoid cell lines (B-LCL). Processing of rNP for HLA-B27-associated presentation seemed to follow the conventional MHC class I pathway predominantly, as presentation was diminished in the presence of lactacystin and brefeldin A, but was less sensitive to chloroquine and NH4Cl. HLA-B27-associated presentation was also observed using cells lacking a functional transporter associated with antigen processing, suggesting that alternative pathways may be exploited for processing of rNP.
journal_name
Clin Exp Immunoljournal_title
Clinical and experimental immunologyauthors
Voeten JT,Rimmelzwaan GF,Nieuwkoop NJ,Fouchier RA,Osterhaus ADdoi
10.1046/j.1365-2249.2001.01613.xsubject
Has Abstractpub_date
2001-09-01 00:00:00pages
423-31issue
3eissn
0009-9104issn
1365-2249pii
cei1613journal_volume
125pub_type
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