PMID- 19744714 OWN - NLM STAT- MEDLINE DCOM- 20091020 LR - 20101118 IS - 1872-9142 (Electronic) IS - 0161-5890 (Linking) VI - 46 IP - 16 DP - 2009 Oct TI - Role of Cybr, a cytohesin binder and regulator, in CD4(+) T-cell function and host immunity. PG - 3218-23 LID - 10.1016/j.molimm.2009.08.014 [doi] AB - Cytohesin binder and regulator (Cybr) is known to regulate leukocyte adhesion and migration. However, its function in T-cells is poorly understood. Here, we investigated the role of Cybr in CD4(+) T-cell function and host immunity. Cybr inhibited p38 phosphorylation following CD4(+) T-cell stimulation. Since p38 regulates the expression of T-box expressed in T-cells (T-bet) but not GATA binding protein 3 (GATA-3) in T-cells, Cybr decreased the expression of T-bet and IFN-gamma in CD4(+) T-cells. Moreover, we found that host immunity against Listeria infection and IFN-gamma production in blood were significantly compromised in Cybr-overexpressing transgenic mice. In summary, our data suggest that Cybr represses the expression of T-bet and IFN-gamma via an inhibition of p38 in T-cells and consequently reduces host resistance to bacterial infection in mice. FAU - Chang, Shu-Lin AU - Chang SL AD - Agricultural Biotechnology Research Center, Academia Sinica, Nankang, Taipei, Taiwan. FAU - Chang, C Lee-Tian AU - Chang CL FAU - Huang, Pei-Ing AU - Huang PI FAU - Tao, Mi-Hua AU - Tao MH FAU - Yang, Wen-Chin AU - Yang WC LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20090909 PL - England TA - Mol Immunol JT - Molecular immunology JID - 7905289 RN - 0 (Carrier Proteins) RN - 0 (Cybr protein, mouse) RN - 0 (GATA3 Transcription Factor) RN - 0 (Gata3 protein, mouse) RN - 0 (Membrane Proteins) RN - 0 (T-Box Domain Proteins) RN - 0 (T-box transcription factor TBX21) RN - 82115-62-6 (Interferon-gamma) RN - EC 2.7.11.24 (p38 Mitogen-Activated Protein Kinases) SB - IM MH - Animals MH - CD4-Positive T-Lymphocytes/*immunology/metabolism MH - Carrier Proteins/*immunology/metabolism MH - GATA3 Transcription Factor/biosynthesis/immunology MH - Gene Expression Regulation/*immunology MH - Interferon-gamma/biosynthesis/*immunology MH - Listeria monocytogenes/*immunology MH - Listeriosis/blood/*immunology MH - Membrane Proteins/*immunology/metabolism MH - Mice MH - Phosphorylation/immunology MH - T-Box Domain Proteins/biosynthesis/immunology MH - p38 Mitogen-Activated Protein Kinases/immunology/metabolism EDAT- 2009/09/12 06:00 MHDA- 2009/10/21 06:00 CRDT- 2009/09/12 06:00 PHST- 2009/03/21 00:00 [received] PHST- 2009/08/11 00:00 [revised] PHST- 2009/08/12 00:00 [accepted] PHST- 2009/09/12 06:00 [entrez] PHST- 2009/09/12 06:00 [pubmed] PHST- 2009/10/21 06:00 [medline] AID - S0161-5890(09)00680-4 [pii] AID - 10.1016/j.molimm.2009.08.014 [doi] PST - ppublish SO - Mol Immunol. 2009 Oct;46(16):3218-23. doi: 10.1016/j.molimm.2009.08.014. Epub 2009 Sep 9.