PMID- 10051633 OWN - NLM STAT- MEDLINE DCOM- 19990415 LR - 20190501 IS - 0027-8424 (Print) IS - 0027-8424 (Linking) VI - 96 IP - 5 DP - 1999 Mar 2 TI - Activation of target-tissue immune-recognition molecules by double-stranded polynucleotides. PG - 2285-90 AB - Abnormal expression of major histocompatibility complex (MHC) class I and class II in various tissues is associated with autoimmune disease. Autoimmune responses can be triggered by viral infections or tissue injuries. We show that the ability of a virus or a tissue injury to increase MHC gene expression is duplicated by any fragment of double-stranded (ds) DNA or dsRNA introduced into the cytoplasm of nonimmune cells. Activation is sequence-independent, is induced by ds polynucleotides as small as 25 bp in length, and is not duplicated by single-stranded polynucleotides. In addition to causing abnormal MHC expression, the ds nucleic acids increase the expression of genes necessary for antigen processing and presentation: proteasome proteins (e.g., LMP2), transporters of antigen peptides; invariant chain, HLA-DM, and the costimulatory molecule B7.1. The mechanism is different from and additive to that of gamma-interferon (gammaIFN), i.e., ds polynucleotides increase class I much more than class II, whereas gammaIFN increases class II more than class I. The ds nucleic acids also induce or activate Stat1, Stat3, mitogen-activated protein kinase, NF-kappaB, the class II transactivator, RFX5, and the IFN regulatory factor 1 differently from gammaIFN. CpG residues are not responsible for this effect, and the action of the ds polynucleotides could be shown in a variety of cell types in addition to thyrocytes. We suggest that this phenomenon is a plausible mechanism that might explain how viral infection of tissues or tissue injury triggers autoimmune disease; it is potentially relevant to host immune responses induced during gene therapy. FAU - Suzuki, K AU - Suzuki K AD - Cell Regulation Section, Metabolic Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA. FAU - Mori, A AU - Mori A FAU - Ishii, K J AU - Ishii KJ FAU - Saito, J AU - Saito J FAU - Singer, D S AU - Singer DS FAU - Klinman, D M AU - Klinman DM FAU - Krause, P R AU - Krause PR FAU - Kohn, L D AU - Kohn LD LA - eng PT - Journal Article PL - United States TA - Proc Natl Acad Sci U S A JT - Proceedings of the National Academy of Sciences of the United States of America JID - 7505876 RN - 0 (DNA, Viral) RN - 0 (DNA-Binding Proteins) RN - 0 (EBV-associated membrane antigen, Epstein-Barr virus) RN - 0 (NF-kappa B) RN - 0 (RNA, Double-Stranded) RN - 0 (STAT1 Transcription Factor) RN - 0 (STAT3 Transcription Factor) RN - 0 (Stat1 protein, mouse) RN - 0 (Stat1 protein, rat) RN - 0 (Stat3 protein, mouse) RN - 0 (Stat3 protein, rat) RN - 0 (Trans-Activators) RN - 0 (Viral Matrix Proteins) RN - 82115-62-6 (Interferon-gamma) RN - EC 2.7.11.17 (Calcium-Calmodulin-Dependent Protein Kinases) SB - IM MH - 3T3 Cells MH - Animals MH - Calcium-Calmodulin-Dependent Protein Kinases/metabolism MH - Cell Line MH - DNA, Viral/*immunology MH - DNA-Binding Proteins/metabolism MH - Gene Expression Regulation/*immunology MH - Genes, MHC Class I MH - Genes, MHC Class II MH - Interferon-gamma/immunology MH - *Major Histocompatibility Complex MH - Mice MH - NF-kappa B/metabolism MH - RNA, Double-Stranded/immunology MH - Rats MH - Reverse Transcriptase Polymerase Chain Reaction MH - STAT1 Transcription Factor MH - STAT3 Transcription Factor MH - Simplexvirus/*immunology MH - Thyroid Gland MH - Trans-Activators/metabolism MH - Transfection MH - Viral Matrix Proteins/immunology PMC - PMC26775 EDAT- 1999/03/03 00:00 MHDA- 1999/03/03 00:01 CRDT- 1999/03/03 00:00 PHST- 1999/03/03 00:00 [pubmed] PHST- 1999/03/03 00:01 [medline] PHST- 1999/03/03 00:00 [entrez] AID - 10.1073/pnas.96.5.2285 [doi] PST - ppublish SO - Proc Natl Acad Sci U S A. 1999 Mar 2;96(5):2285-90. doi: 10.1073/pnas.96.5.2285.