PMID- 26365345 OWN - NLM STAT- MEDLINE DCOM- 20160111 LR - 20151005 IS - 1090-2104 (Electronic) IS - 0006-291X (Linking) VI - 466 IP - 3 DP - 2015 Oct 23 TI - Amphiregulin may be a new biomarker of classically activated macrophages. PG - 393-9 LID - S0006-291X(15)30554-4 [pii] LID - 10.1016/j.bbrc.2015.09.037 [doi] AB - Amphiregulin (Areg) participates in tissue repair and inflammation regulation. As important effector cells in inflammation, macrophages can be polarized to classically (M1) or alternatively (M2) activated phenotype with diverse functions in immunity. However, the relationship between Areg expression and macrophage activation is poorly understood. Here we report that Areg was significantly expressed in M1 but not in M2 macrophages. This was confirmed by analyses of RT-PCR and ELISA in peritoneal macrophages, and by evaluating protein expression in alveolar macrophages and RAW264.7 cells. Selective inhibitors of TLR4 (CLI-095) and MAP kinase, including Erk1/2 (PD98059), JNK (SP600125) and p38 (SB203580), significantly reduced Areg expression in M1 macrophages, suggesting that M1 macrophages produce Areg mainly through the TLR4-MAPK pathway, which is involved in the mechanism of M1 activation. When compared with productions of classical biomarkers of M1 macrophages, Areg expression was highly consistent in time series. Taken together, Areg may be an effective new biomarker of M1 macrophages. CI - Copyright (c) 2015 Elsevier Inc. All rights reserved. FAU - Meng, Chen AU - Meng C AD - Department of Anesthesiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. Electronic address: 27739865@qq.com. FAU - Liu, Guilin AU - Liu G AD - Department of Anesthesiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. Electronic address: 524397325@qq.com. FAU - Mu, Honglan AU - Mu H AD - Department of Internal Medicine, Tongji Medical College Hospital, Huazhong University of Science and Technology, Wuhan, China. Electronic address: 126071497@qq.com. FAU - Zhou, Miaomiao AU - Zhou M AD - Department of Anesthesiology, Zhongnan Hospital, Wuhan University, Wuhan, China. Electronic address: zhoumiaomiao09@aliyun.com. FAU - Zhang, Shihai AU - Zhang S AD - Department of Anesthesiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. Electronic address: zhangshihai@vip.163.com. FAU - Xu, Younian AU - Xu Y AD - Department of Anesthesiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. Electronic address: xyn0103@126.com. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20150910 PL - United States TA - Biochem Biophys Res Commun JT - Biochemical and biophysical research communications JID - 0372516 RN - 0 (Amphiregulin) RN - 0 (Biomarkers) RN - 0 (Cytokines) RN - 0 (Tlr4 protein, mouse) RN - 0 (Toll-Like Receptor 4) RN - 62229-50-9 (Epidermal Growth Factor) SB - IM MH - Amphiregulin/*metabolism MH - Animals MH - Biomarkers/metabolism MH - Cell Differentiation MH - Cell Line MH - Cytokines/metabolism MH - Epidermal Growth Factor/metabolism MH - Gene Expression Regulation MH - Inflammation/metabolism MH - Macrophage Activation MH - Macrophages/*metabolism MH - Macrophages, Alveolar/*metabolism MH - Macrophages, Peritoneal/*metabolism MH - Male MH - Mice MH - Mice, Inbred C57BL MH - Phenotype MH - Signal Transduction MH - Th2 Cells/cytology MH - Time Factors MH - Toll-Like Receptor 4/*metabolism OTO - NOTNLM OT - Amphiregulin OT - Epidermal growth factor OT - Macrophage activation OT - Macrophages OT - Receptor EDAT- 2015/09/15 06:00 MHDA- 2016/01/12 06:00 CRDT- 2015/09/15 06:00 PHST- 2015/09/01 00:00 [received] PHST- 2015/09/07 00:00 [accepted] PHST- 2015/09/15 06:00 [entrez] PHST- 2015/09/15 06:00 [pubmed] PHST- 2016/01/12 06:00 [medline] AID - S0006-291X(15)30554-4 [pii] AID - 10.1016/j.bbrc.2015.09.037 [doi] PST - ppublish SO - Biochem Biophys Res Commun. 2015 Oct 23;466(3):393-9. doi: 10.1016/j.bbrc.2015.09.037. Epub 2015 Sep 10.