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  • Title: [High mobility group box-1 protein activates Janus kinase-signal transducer and activator of transcription pathway in rat peritoneal macrophages].
    Author: Liu H, Yao YM, Dong YQ, Yu Y, Sheng ZY.
    Journal: Zhongguo Wei Zhong Bing Ji Jiu Yi Xue; 2004 Oct; 16(10):592-5. PubMed ID: 15461833.
    Abstract:
    OBJECTIVE: To investigate the potential signal transduction mechanism in high mobility group box-1 protein (HMGB1)-induced inflammatory response in rat peritoneal macrophages. METHODS: Peritoneal macrophages obtained from male Wistar rats were incubated for 3 days before they were stimulated by HMGB1 (10 microg/ml). At various time points after HMGB1 stimulation, macrophages were denatured directly in cell culture flasks to detect activation of Janus kinase-2 (JAK2), signal transducer and activator of transcription-1 (STAT1) and STAT3 by immunoprecipitation, Western blotting and electrophoretic mobility shift assay, respectively. RESULTS: HMGB1 stimulation could activate STAT1 and STAT3 in peritoneal macrophages in 2 hours, among them the activation of STAT3 appeared to be the quickest, peaking as early as 10 minutes after stimulation. But no marked change in JAK2 activity was observed within 2 hours following HMGB1 stimulation. CONCLUSION: These data suggest that Janus kinase-signal transducer and activator of transcription pathway might be involved in regulation of HMGB1-induced inflammatory response in peritoneal macrophages.
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