start-ver=1.4 cd-journal=joma no-vol=144 cd-vols= no-issue=3 article-no= start-page=272 end-page=282 dt-received= dt-revised= dt-accepted= dt-pub-year=2012 dt-pub=201209 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Spred-2 deficiency exacerbates acetaminophen-induced hepatotoxicity in mice en-subtitle= kn-subtitle= en-abstract= kn-abstract=MAPKs are involved in acetaminophen (APAP)-hepatotoxicity, but the regulatory mechanism remains unknown. Here, we explored the role of Spred-2 that negatively regulates Ras/ERK pathway in APAP-hepatotoxicity. Spred-2 knockout (KO) mice demonstrated exacerbated liver injury, an event that was associated with increased numbers of CD4(+) T, CD8(+) T and NK cells in the liver compared to the control. Levels of CXCL9/CXCL10 that attract and activate these cells were increased in Spred-2 KO-liver. Kupffer cells isolated from Spred-2 KO mice after APAP challenge expressed higher levels of CXCL9/CXCL10 than those from the control. Upon stimulation with APAP or IFN gamma, naive Kupffer cells from Spred-2 KO mice expressed higher levels of CXCL9/CXCL10. NK cell-depletion attenuated APAP-hepatotoxicity with lowered hepatic IFN gamma and decreased numbers of not only NK cells but also CD4(+) T and CD8(+) T cells in the liver. These results suggest that Spred-2 negatively regulates APAP-hepatotoxicity under the control of Kupffer cells and NK cells. en-copyright= kn-copyright= en-aut-name=WakabayashiHiroshi en-aut-sei=Wakabayashi en-aut-mei=Hiroshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=ItoToshihiro en-aut-sei=Ito en-aut-mei=Toshihiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=FushimiSoichiro en-aut-sei=Fushimi en-aut-mei=Soichiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=NakashimaYuki en-aut-sei=Nakashima en-aut-mei=Yuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=ItakuraJyunya en-aut-sei=Itakura en-aut-mei=Jyunya kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=LiuQiuying en-aut-sei=Liu en-aut-mei=Qiuying kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= en-aut-name=WinMin Min en-aut-sei=Win en-aut-mei=Min Min kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=7 ORCID= en-aut-name=SunCuiming en-aut-sei=Sun en-aut-mei=Cuiming kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=8 ORCID= en-aut-name=ChenCao en-aut-sei=Chen en-aut-mei=Cao kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=9 ORCID= en-aut-name=SatoMiwa en-aut-sei=Sato en-aut-mei=Miwa kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=10 ORCID= en-aut-name=MinoMegumi en-aut-sei=Mino en-aut-mei=Megumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=11 ORCID= en-aut-name=OginoTetsuya en-aut-sei=Ogino en-aut-mei=Tetsuya kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=12 ORCID= en-aut-name=MakinoHirofumi en-aut-sei=Makino en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=13 ORCID= en-aut-name=YoshimuraAkihiko en-aut-sei=Yoshimura en-aut-mei=Akihiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=14 ORCID= en-aut-name=MatsukawaAkihiro en-aut-sei=Matsukawa en-aut-mei=Akihiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=15 ORCID= affil-num=1 en-affil= kn-affil=Okayama Univ, Dept Pathol & Expt Med, Grad Sch Med Dent & Pharmaceut Sci affil-num=2 en-affil= kn-affil=Okayama Univ, Dept Pathol & Expt Med, Grad Sch Med Dent & Pharmaceut Sci affil-num=3 en-affil= kn-affil=Okayama Univ, Dept Pathol & Expt Med, Grad Sch Med Dent & Pharmaceut Sci affil-num=4 en-affil= kn-affil=Okayama Univ, Dept Pathol & Expt Med, Grad Sch Med Dent & Pharmaceut Sci affil-num=5 en-affil= kn-affil=Okayama Univ, Dept Pathol & Expt Med, Grad Sch Med Dent & Pharmaceut Sci affil-num=6 en-affil= kn-affil=Okayama Univ, Dept Pathol & Expt Med, Grad Sch Med Dent & Pharmaceut Sci affil-num=7 en-affil= kn-affil=Okayama Univ, Dept Pathol & Expt Med, Grad Sch Med Dent & Pharmaceut Sci affil-num=8 en-affil= kn-affil=Okayama Univ, Dept Pathol & Expt Med, Grad Sch Med Dent & Pharmaceut Sci affil-num=9 en-affil= kn-affil=Okayama Univ, Dept Pathol & Expt Med, Grad Sch Med Dent & Pharmaceut Sci affil-num=10 en-affil= kn-affil=Okayama Univ, Dept Pathol & Expt Med, Grad Sch Med Dent & Pharmaceut Sci affil-num=11 en-affil= kn-affil=Okayama Univ, Dept Pathol & Expt Med, Grad Sch Med Dent & Pharmaceut Sci affil-num=12 en-affil= kn-affil=Okayama Univ, Dept Pathol & Expt Med, Grad Sch Med Dent & Pharmaceut Sci affil-num=13 en-affil= kn-affil=Okayama Univ, Dept Med & Clin Sci, Grad Sch Med Dent & Pharmaceut Sci affil-num=14 en-affil= kn-affil=Keio Univ, Sch Med, Dept Microbiol & Immunol affil-num=15 en-affil= kn-affil=Okayama Univ, Dept Pathol & Expt Med, Grad Sch Med Dent & Pharmaceut Sci en-keyword=Acetaminophen kn-keyword=Acetaminophen en-keyword=Hepatotoxicity kn-keyword=Hepatotoxicity en-keyword=Liver immunology kn-keyword=Liver immunology en-keyword=Signaling pathway kn-keyword=Signaling pathway en-keyword=Toxicology kn-keyword=Toxicology END