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- W4313360050 abstract "Abstract DNaseII is a lysosomal DNase that plays a critical role in immune homeostasis. DNaseII deficiency in mice causes embryonic lethality, due to severe anemia associated with excessive production of type I interferon (IFN), and can be rescued by IFN receptor knockout (IFNaR). The DNaseII/IFNaR double knockout (DKO) mice develop a late-onset inflammatory arthritis, dependent on the cytosolic DNA sensor STING (Stimulator of Interferon Genes). They also develop early-onset clinical manifestations of systemic autoimmunity including disrupted hematopoiesis and B cell lymphopoiesis, splenomegaly (due to increased accumulation of Ter119+ cells), and the production of anti-nuclear antibodies (ANA), through a mechanism that is STING-independent, Unc93B1-dependent and likely to result from endosomal RNA-sensing TLRs. Bone marrow (BM) chimera studies have shown that the DNaseII deficiency is essential in both radioresistant host cells and hematopoietic donor cells for all disease manifestations. Development of arthritis requires the presence of STING in both host and donor. The TLR-dependent defects require TLR expression in only the hematopoietic compartment but still need DNaseII−/− recipients. Remarkably transplantation of DKO spleen fragments or injection of DKO spleen cells alone into DNaseII-sufficient Rag−/− mice leads to splenomegaly and disrupted hematopoiesis and lymphopoiesis. Moreover DKO T cells are sufficient to transfer these TLR-associated defects to the Rag−/− mice. As activated T cells are known to be radioresistant, T cells activated in a DKO environment may account for the radioresistant host component required to precipitate the TLR-dependent disease manifestations." @default.
- W4313360050 created "2023-01-06" @default.
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- W4313360050 date "2017-05-01" @default.
- W4313360050 modified "2023-10-03" @default.
- W4313360050 title "Endosomal RNA-sensing toll-like receptor stimulated T cells play a unique role in autoimmune manifestations in murine model of DNA accrual." @default.
- W4313360050 doi "https://doi.org/10.4049/jimmunol.198.supp.75.9" @default.
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