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- W1969141812 abstract "IL-12 is secreted by kidney tubular epithelial cells in autoimmune MRL-Fas(lpr) mice before renal injury and increases with advancing disease. Because IL-12 is a potent inducer of IFN-gamma, the purpose of this study was to determine whether local provision of IL-12 elicits IFN-gamma-secreting T cells within the kidney, which, in turn, incites injury in MRL-Fas(lpr) mice. We used an ex vivo retroviral gene transfer strategy to construct IL-12-secreting MRL-Fas(lpr) tubular epithelial cells (IL-12 carrier cells), which were implanted under the kidney capsule of MRL-Fas(lpr) mice before renal disease for a sustained period (28 days). IL-12 carrier cells generated intrarenal and systemic IL-12. IL-12 fostered a marked, well-demarcated accumulation of CD4, CD8, and double negative (CD4-CD8- B220+) T cells adjacent to the implant site. We detected more IFN-gamma-producing T cells (CD4 > CD8 > CD4-CD8- B220+) at 28 days (73 +/- 14%) as compared with 7 days (20 +/- 8%) after implanting the IL-12 carrier cells; the majority of these cells were proliferating (60-70%). By comparison, an increase in systemic IL-12 resulted in a diffuse acceleration of pathology in the contralateral (unimplanted) kidney. IFN-gamma was required for IL-12-incited renal injury, because IL-12 carrier cells failed to elicit injury in MRL-Fas(lpr) kidneys genetically deficient in IFN-gamma receptors. Furthermore, IFN-gamma carrier cells elicited kidney injury in wild-type MRL-Fas(lpr) mice. Taken together, IL-12 elicits autoimmune injury by fostering the accumulation of IFN-gamma-secreting CD4, CD8, and CD4-CD8- B220+ T cells within the kidney, which, in turn, promote a cascade of events culminating in autoimmune kidney disease in MRL-Fas(lpr) mice." @default.
- W1969141812 created "2016-06-24" @default.
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- W1969141812 date "1999-12-15" @default.
- W1969141812 modified "2023-09-23" @default.
- W1969141812 title "IL-12 drives IFN-gamma-dependent autoimmune kidney disease in MRL-Fas(lpr) mice." @default.
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