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Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Science 2022 ; 376 (6590): eabi9591 Nephropedia Template TP
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KIR(+)CD8(+) T cells suppress pathogenic T cells and are active in autoimmune diseases and COVID-19 #MMPMID35258337
Li J; Zaslavsky M; Su Y; Guo J; Sikora MJ; van Unen V; Christophersen A; Chiou SH; Chen L; Li J; Ji X; Wilhelmy J; McSween AM; Palanski BA; Mallajosyula VVA; Bracey NA; Dhondalay GKR; Bhamidipati K; Pai J; Kipp LB; Dunn JE; Hauser SL; Oksenberg JR; Satpathy AT; Robinson WH; Dekker CL; Steinmetz LM; Khosla C; Utz PJ; Sollid LM; Chien YH; Heath JR; Fernandez-Becker NQ; Nadeau KC; Saligrama N; Davis MM
Science 2022[Apr]; 376 (6590): eabi9591 PMID35258337show ga
In this work, we find that CD8(+) T cells expressing inhibitory killer cell immunoglobulin-like receptors (KIRs) are the human equivalent of Ly49(+)CD8(+) regulatory T cells in mice and are increased in the blood and inflamed tissues of patients with a variety of autoimmune diseases. Moreover, these CD8(+) T cells efficiently eliminated pathogenic gliadin-specific CD4(+) T cells from the leukocytes of celiac disease patients in vitro. We also find elevated levels of KIR(+)CD8(+) T cells, but not CD4(+) regulatory T cells, in COVID-19 patients, correlating with disease severity and vasculitis. Selective ablation of Ly49(+)CD8(+) T cells in virus-infected mice led to autoimmunity after infection. Our results indicate that in both species, these regulatory CD8(+) T cells act specifically to suppress pathogenic T cells in autoimmune and infectious diseases.