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  • 1
    Publication Date: 2014-12-20
    Description: Multivalent molecules with repetitive structures including bacterial capsular polysaccharides and viral capsids elicit antibody responses through B cell receptor (BCR) crosslinking in the absence of T cell help. We report that immunization with these T cell-independent type 2 (TI-2) antigens causes up-regulation of endogenous retrovirus (ERV) RNAs in antigen-specific mouse B cells. These RNAs are detected via a mitochondrial antiviral signaling protein (MAVS)-dependent RNA sensing pathway or reverse-transcribed and detected via the cGAS-cGAMP-STING pathway, triggering a second, sustained wave of signaling that promotes specific immunoglobulin M production. Deficiency of both MAVS and cGAS, or treatment of MAVS-deficient mice with reverse transcriptase inhibitors, dramatically inhibits TI-2 antibody responses. These findings suggest that ERV and two innate sensing pathways that detect them are integral components of the TI-2 B cell signaling apparatus.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4391621/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4391621/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zeng, Ming -- Hu, Zeping -- Shi, Xiaolei -- Li, Xiaohong -- Zhan, Xiaoming -- Li, Xiao-Dong -- Wang, Jianhui -- Choi, Jin Huk -- Wang, Kuan-wen -- Purrington, Tiana -- Tang, Miao -- Fina, Maggy -- DeBerardinis, Ralph J -- Moresco, Eva Marie Y -- Pedersen, Gabriel -- McInerney, Gerald M -- Karlsson Hedestam, Gunilla B -- Chen, Zhijian J -- Beutler, Bruce -- P01 AI070167/AI/NIAID NIH HHS/ -- R01 AI093967/AI/NIAID NIH HHS/ -- R01 CA157996/CA/NCI NIH HHS/ -- U19 AI100627/AI/NIAID NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2014 Dec 19;346(6216):1486-92. doi: 10.1126/science.346.6216.1486.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for the Genetics of Host Defense, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-8502, USA. ; Department of Pediatrics and Children's Medical Center Research Institute, and McDermott Center for Human Growth and Development, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-8502, USA. ; Center for the Genetics of Host Defense, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-8502, USA. Howard Hughes Medical Institute, Department of Molecular Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-9148, USA. ; Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Nobels vag 16, SE-171 77 Stockholm, Sweden. ; Center for the Genetics of Host Defense, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-8502, USA. Bruce.Beutler@UTSouthwestern.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25525240" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing/genetics/*immunology ; Animals ; Antibody Formation ; Antigens, T-Independent/*immunology ; B-Lymphocytes/*immunology ; Cytosol/immunology ; DNA/immunology ; Endogenous Retroviruses/genetics/*immunology ; Lymphocyte Activation ; Membrane Proteins/immunology ; Mice ; Mice, Inbred C57BL ; NF-kappa B/metabolism ; Nucleotides, Cyclic/immunology ; Nucleotidyltransferases/genetics/*immunology ; RNA, Viral/genetics/*immunology ; Transcription, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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