Endogenous MHC class II processing of a viral nuclear antigen after autophagy - PubMed (original) (raw)
. 2005 Jan 28;307(5709):593-6.
doi: 10.1126/science.1104904. Epub 2004 Dec 9.
Affiliations
- PMID: 15591165
- DOI: 10.1126/science.1104904
Endogenous MHC class II processing of a viral nuclear antigen after autophagy
Casper Paludan et al. Science. 2005.
Abstract
CD4+ T cells classically recognize antigens that are endocytosed and processed in lysosomes for presentation on major histocompatibility complex (MHC) class II molecules. Here, endogenous Epstein-Barr virus nuclear antigen 1 (EBNA1) was found to gain access to this pathway by autophagy. On inhibition of lysosomal acidification, EBNA1, the dominant CD4+ T cell antigen of latent Epstein-Barr virus infection, slowly accumulated in cytosolic autophagosomes. In addition, inhibition of autophagy decreased recognition by EBNA1-specific CD4+ T cell clones. Thus, lysosomal processing after autophagy may contribute to MHC class II-restricted surveillance of long-lived endogenous antigens including nuclear proteins relevant to disease.
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