PMID- 20560354 OWN - NLM STAT- MEDLINE DCOM- 20100707 LR - 20181201 IS - 0001-6209 (Print) IS - 0001-6209 (Linking) VI - 50 IP - 4 DP - 2010 Apr TI - [Recombinant cIL-18-binding protein as an antagonist to cIL-18 enhanced PBMCs secreting IFN-gamma]. PG - 506-11 AB - OBJECTIVE: Interleukin-18 (IL-18) is a proinflammatory cytokines that plays a key role of immune regulation through activating the Th 1 cell and NK cell secreting interferon-gamma (IFN-gamma). IL-18-binding proteins(IL-18BP) secreted in human and mouse can antagonise the activity of IL-18. The homologue gene of IL-18BP from fowlpox virus genome was predicted and identified of its expressed protein, to use as an antagonist to IL-18 guiding disease. METHODS: The cIL-18BP gene was isolated from the genome of fowlpox vaccine virus by PCR through a pair of special primers and cloned into vectors pPICZalphaA, then expressed in yeast GS115. The biologic activity of recombinant proteins binding with cIL-18 was measured, inhibiting the activity of cIL-18 enhancing relative cells secreting IFN-gamma was confirmed through ELISA. RESULTS: The cIL-18BP gene was cloned from fowlpox virus and acquired high performance expression in yeast systems induced with methanol identified by SDS-PAGE. Recombinant cIL-18BP purified can bind specifically with recombinant cIL-18 determined by ELISA test. cIL-18BP can antagonise the activity of cIL-18 with determining the IFN-gamma concentration secreting in PBMCs and MSB1 cells stimulated by cIL-18 respectively. CONCLUSION: The experiment indicates that recombinant cIL-18BP can inhibit the activity of cIL-18 stimulating related immune cells secreting IFN-gamma. Deletion of the cIL-18BP from virus may improve the safety and immunogenicity of fowlpox virus vaccine. FAU - Liu, Wenqiang AU - Liu W AD - Agricultural College of Liaocheng University, Prevention and Control Technology Institute of Animal Disease in Liaocheng University, Liaocheng 252059, China. liuwqsky@sina.com FAU - Liu, Guiqin AU - Liu G FAU - Qin, Xuling AU - Qin X FAU - Wang, Guiying AU - Wang G LA - chi PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - China TA - Wei Sheng Wu Xue Bao JT - Wei sheng wu xue bao = Acta microbiologica Sinica JID - 21610860R RN - 0 (CD59 Antigens) RN - 0 (Carrier Proteins) RN - 0 (Intercellular Signaling Peptides and Proteins) RN - 0 (Interleukin-18) RN - 0 (Recombinant Proteins) RN - 0 (interleukin-18 binding protein) RN - 82115-62-6 (Interferon-gamma) RN - U202363UOS (Fenofibrate) SB - IM MH - Animals MH - CD59 Antigens/*immunology MH - Carrier Proteins MH - Fenofibrate/*antagonists & inhibitors MH - Humans MH - Intercellular Signaling Peptides and Proteins/metabolism/*pharmacology MH - Interferon-gamma/*antagonists & inhibitors MH - Interleukin-18/metabolism/*physiology MH - Mice MH - Recombinant Proteins/genetics/metabolism EDAT- 2010/06/22 06:00 MHDA- 2010/07/08 06:00 CRDT- 2010/06/22 06:00 PHST- 2010/06/22 06:00 [entrez] PHST- 2010/06/22 06:00 [pubmed] PHST- 2010/07/08 06:00 [medline] PST - ppublish SO - Wei Sheng Wu Xue Bao. 2010 Apr;50(4):506-11.