PMID- 15153312 OWN - NLM STAT- MEDLINE DCOM- 20050127 LR - 20061115 IS - 1079-9907 (Print) IS - 1079-9907 (Linking) VI - 24 IP - 5 DP - 2004 May TI - Differential upregulation of interleukin-18 receptor alpha chain between CD4+ and CD8+ T cells during acute graft-versus-host disease in mice. PG - 291-6 AB - Interleukin-18 (IL-18), a unique cytokine that stimulates both T helper 1 (Th1) and Th2 responses, is associated with acute graft-versus-host disease (aGVHD), the major limiting toxicity following allogeneic stem cell transplantation. Here, we investigated the mechanism underlying the upregulation of IL-18 receptor (IL-18R) expression on T cells in murine aGVHD models. The induction of aGVHD elevated host serum IL-12 levels and increased expression of IL-18Ralpha chain (IL-18Ralpha) on engrafted T cells, in particular on CD8+ T cells. However, IL-18Ralpha expression did not increase on the CD4+ T cells of an IL-12-deficient host, indicating the IL-12-dependent upregulation of IL-18Ralpha expression on CD4+ T cells during aGVHD. Purified donor CD8+ T cells transferred in the host increased IL-18Ralpha expression. In vitro experiments showed that IL-18Ralpha expression upregulated on CD8+ T cells but not on CD4+ T cells on stimulation through the T cell receptor (TCR). These results suggest that IL-18Ralpha expression is differentially upregulated between CD4+ and CD8+ T cells during aGVHD, depending on endogenous IL-12 and TCR engagement, respectively. FAU - Itoi, Hisayuki AU - Itoi H AD - Department of Internal Medicine, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501, Japan. FAU - Fujimori, Yoshihiro AU - Fujimori Y FAU - Tsutsui, Hiroko AU - Tsutsui H FAU - Matsui, Kiyoshi AU - Matsui K FAU - Hada, Toshikazu AU - Hada T FAU - Kakishita, Eizo AU - Kakishita E FAU - Okamura, Haruki AU - Okamura H FAU - Hara, Hiroshi AU - Hara H FAU - Nakanishi, Kenji AU - Nakanishi K LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Interferon Cytokine Res JT - Journal of interferon & cytokine research : the official journal of the International Society for Interferon and Cytokine Research JID - 9507088 RN - 0 (Il18r1 protein, mouse) RN - 0 (Interleukin-18 Receptor alpha Subunit) RN - 0 (Receptors, Antigen, T-Cell) RN - 0 (Receptors, Interleukin) RN - 0 (Receptors, Interleukin-18) RN - 187348-17-0 (Interleukin-12) SB - IM MH - Acute Disease MH - Animals MH - CD4-Positive T-Lymphocytes/*immunology MH - CD8-Positive T-Lymphocytes/*immunology MH - Cell Transplantation MH - Female MH - Gene Expression Regulation/immunology MH - Graft vs Host Disease/*immunology/metabolism MH - Interleukin-12/immunology MH - Interleukin-18 Receptor alpha Subunit MH - Mice MH - Mice, Inbred C57BL MH - Receptors, Antigen, T-Cell/immunology MH - Receptors, Interleukin/biosynthesis/*immunology MH - Receptors, Interleukin-18 MH - Spleen/cytology/transplantation MH - Th1 Cells/immunology MH - Th2 Cells/immunology MH - Transplantation Chimera/immunology MH - Up-Regulation EDAT- 2004/05/22 05:00 MHDA- 2005/01/28 09:00 CRDT- 2004/05/22 05:00 PHST- 2004/05/22 05:00 [pubmed] PHST- 2005/01/28 09:00 [medline] PHST- 2004/05/22 05:00 [entrez] AID - 10.1089/107999004323065075 [doi] PST - ppublish SO - J Interferon Cytokine Res. 2004 May;24(5):291-6. doi: 10.1089/107999004323065075.