Blockade of IL-6-signaling inhibits the pathogenesis of CD4+ T cell-mediated lethal graft-versus-host reaction against minor histocompatibility antigen.
Graft-versus-host reaction (GVHR) is considered as a problem in hematopoietic cell transplantation. We found that CD45RB(high) CD62L(+) naïve CD4(+) T cells from wild-type B10D2 (H-2d MMTV6(-)) mice immediately differentiated into effector T cells producing high-levels of various cytokines after the transfer into BALB/c RAG2(-/-) (H-2d MMTV6(+)) mice. The expanded CD4(+) T cells, which have almost TCR Vβ3 chain, recognized the minor antigen of recipient mice and brought typical severe GVHR symptoms such as eyelid irritation, diarrhea, and liver failure. Eventually, all of the recipient mice transferred CD4(+) T cells was dead within 10 days. We demonstrated here that blockade of IL-6 signaling by administration of anti-IL-6 receptor (IL-6R) monoclonal antibody (mAb) remarkably inhibited the CD4(+) T cell-mediated lethal GVHR. In addition, we confirmed that the in vivo injection of anti-IL-6R mAb prevented the generation of effector CD4(+) T cells which produce the inflammatory cytokines such as IFN-γ, TNF-α, and IL-17. These findings indicated that IL-6 was a critical factor in the CD4(+) T cell-dependent acute GVHR induced by a minor-antigen, suggesting that IL-6-mediated signaling pathway would be a strong therapeutic target in T cell-mediated GVHR as well as other diseases including autoimmune and inflammation.
Division of Immunoregulation, Section of Disease Control, Institute for Genetic Medicine, Hokkaido University, Kita-ku, Sapporo, Japan.
Daisuke
D
Noguchi
Daiko
D
Wakita
Takayuki
T
Ohkuri
Masaki
M
Tajima
Kenji
K
Chamoto
Hidemitsu
H
Kitamura
Takashi
T
Nishimura
D019264:Adoptive Transfer; D000818:Animals; D000911:Antibodies, Monoclonal / Q000494:pharmacology; D015496:CD4-Positive T-Lymphocytes / Q000187:drug effects / Q000276:immunology*; D049109:Cell Proliferation / Q000187:drug effects; D005260:Female; D006086:Graft vs Host Disease / Q000276:immunology* / Q000401:mortality; D006087:Graft vs Host Reaction / Q000187:drug effects / Q000276:immunology*; D008231:Lymphopenia / Q000276:immunology; D051379:Mice; D008807:Mice, Inbred BALB C; D018345:Mice, Knockout; D015778:Minor Histocompatibility Antigens / Q000276:immunology*; D009102:Multiple Organ Failure / Q000276:immunology / Q000473:pathology; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000276:immunology; D019947:Receptors, Interleukin-6 / Q000037:antagonists & inhibitors*; D015398:Signal Transduction / Q000187:drug effects / Q000276:immunology*; D050378:T-Lymphocytes, Regulatory / Q000187:drug effects / Q000276:immunology; D058504:Th17 Cells / Q000187:drug effects / Q000276:immunology
D000911:Antibodies, Monoclonal; D015778:Minor Histocompatibility Antigens; D016693:Receptors, Antigen, T-Cell, alpha-beta; D019947:Receptors, Interleukin-6