PMID- 23999049 OWN - NLM STAT- MEDLINE DCOM- 20140623 LR - 20220311 IS - 1879-0089 (Electronic) IS - 0145-305X (Linking) VI - 41 IP - 4 DP - 2013 Dec TI - Molecular and functional characterization of IL-1 receptor type 2 in grass carp: a potent inhibitor of IL-1beta signaling in head kidney leukocytes. PG - 738-45 LID - S0145-305X(13)00250-4 [pii] LID - 10.1016/j.dci.2013.08.023 [doi] AB - IL-1 receptor type 2 (IL-1R2) is known as one of natural IL-1beta singling inhibitors in mammals. However, the functional role of IL-1R2 in fish remains largely unknown. In this study, grass carp (Ctenopharyngodon idellus) IL-1R2 (gcIL-1R2) was identified and functionally characterized. Similar to its fish homologs, the deduced protein of gcIL-1R2 possessed two Ig-like domains in its extracellular region but lacked an intracellular signaling domain. The involvement of gcIL-1R2 in immune response was demonstrated by investigating its expression profiles in head kidney and head kidney leukocytes (HKLs) following in vivo bacterial infection and in vitro LPS treatment, respectively. Moreover, recombinant grass carp IL-1beta (rgcIL-1beta) was able to stimulate gcIL-1R2 mRNA expression with a rapid kinetics. This stimulation was possibly dependent on p38, JNK, p42/44 and NF-kappaB pathways in grass carp HKLs, revealing a new regulatory point of IL-1beta signaling at receptor level in fish. Furthermore, recombinant protein of the gcIL-1R2 extracellular region (rgcIL-1R2) was demonstrated to interact with rgcIL-1beta by using ELISA, elucidating the binding specificity of gcIL-1R2. Importantly, the stimulatory effect of rgcIL-1beta on its own mRNA expression was blocked by rgcIL-1R2 in a dose-dependent manner in grass carp HKLs, providing the evidence for a functional role of IL-1R2 in IL-1beta signaling in teleost. These findings suggested that teleost IL-1R2 may serve as a local naturally occurring inhibitor involving in IL-1beta signaling as seen in mammals. CI - Copyright (c) 2013 Elsevier Ltd. All rights reserved. FAU - Yang, Xiao AU - Yang X AD - School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 610054, People's Republic of China. FAU - Wang, Shangnian AU - Wang S FAU - Du, Linyong AU - Du L FAU - Yang, Kun AU - Yang K FAU - Wang, Xinyan AU - Wang X FAU - Zhang, Anying AU - Zhang A FAU - Zhou, Hong AU - Zhou H LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20130830 PL - United States TA - Dev Comp Immunol JT - Developmental and comparative immunology JID - 7708205 RN - 0 (DNA, Complementary) RN - 0 (Interleukin-1beta) RN - 0 (RNA, Messenger) RN - 0 (Receptors, Interleukin-1 Type II) RN - 0 (Recombinant Proteins) SB - IM MH - Amino Acid Sequence MH - Animals MH - Bacterial Infections/genetics/immunology/metabolism/microbiology MH - Base Sequence MH - Carps/genetics/immunology/*metabolism/microbiology MH - Cloning, Molecular/methods MH - DNA, Complementary/genetics MH - Head Kidney/immunology/*metabolism/microbiology MH - Interleukin-1beta/genetics/immunology/*metabolism MH - Leukocytes/immunology/*metabolism MH - Molecular Sequence Data MH - Phylogeny MH - RNA, Messenger/genetics MH - Receptors, Interleukin-1 Type II/genetics/immunology/*metabolism MH - Recombinant Proteins/genetics/immunology/metabolism MH - Signal Transduction OTO - NOTNLM OT - Grass carp OT - IL-1 receptor type 2 OT - IL-1beta OT - Natural IL-1beta singling inhibitor OT - Receptor binding EDAT- 2013/09/04 06:00 MHDA- 2014/06/24 06:00 CRDT- 2013/09/04 06:00 PHST- 2013/07/09 00:00 [received] PHST- 2013/08/23 00:00 [revised] PHST- 2013/08/24 00:00 [accepted] PHST- 2013/09/04 06:00 [entrez] PHST- 2013/09/04 06:00 [pubmed] PHST- 2014/06/24 06:00 [medline] AID - S0145-305X(13)00250-4 [pii] AID - 10.1016/j.dci.2013.08.023 [doi] PST - ppublish SO - Dev Comp Immunol. 2013 Dec;41(4):738-45. doi: 10.1016/j.dci.2013.08.023. Epub 2013 Aug 30.