PMID- 31402118 OWN - NLM STAT- MEDLINE DCOM- 20200601 LR - 20200601 IS - 1090-2104 (Electronic) IS - 0006-291X (Linking) VI - 518 IP - 1 DP - 2019 Oct 8 TI - Rab GTPase 21 mediates caerulin-induced TRAF3-MKK3-p38 activation and acute pancreatitis response. PG - 50-58 LID - S0006-291X(19)31509-8 [pii] LID - 10.1016/j.bbrc.2019.08.007 [doi] AB - Acute pancreatitis (AP) is a severe inflammatory disease. Caerulin induces significant pro-inflammatory responses in macrophages, causing serve damage to pancreatic acinar cells. The potential role of Rab GTPase 21 (Rab21) in this process was tested in this study. In murine bone marrow-derived macrophages (BMDMs), caerulin induced Rab21-TRAF3-MKK3 complex association. Rab21 silencing (by targeted shRNAs) or knockout (by CRISPR/Cas9 method) largely inhibited caerulin-induced MKK3-TRAF3 association, downstream MKK3-p38 activation and production of several pro-inflammatory cytokines (IL-1beta, TNF-alpha and IL-17). Conversely, ectopic Rab21 overexpression in BMDMs potentiated caerulin-induced MKK3-TRAF3 association and pro-inflammatory cytokines production. The cytotoxicity of caerulin-activated BMDMs to co-cultured pancreatic acinar cells was alleviated by Rab21 knockdown or knockout, but exacerbated with Rab21 overexpression. In vivo, administration of Rab21 shRNA lentivirus significantly attenuated pancreatic and systemic inflammations in caerulin-injected AP mice. Collectively, our results suggest that Rab21 mediates caerulin-induced MKK3-p38 activation and pro-inflammatory responses. CI - Copyright (c) 2019 Elsevier Inc. All rights reserved. FAU - Wang, Na AU - Wang N AD - Department of Gastroenterology, Shanghai Tongren Hospital, Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China. FAU - Meng, Wenying AU - Meng W AD - Department of Gastroenterology, Shanghai Tongren Hospital, Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China. FAU - Jia, Rongrong AU - Jia R AD - Department of Gastroenterology, Shanghai Tongren Hospital, Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China. Electronic address: jiaronghh@163.com. FAU - Xiang, Shihao AU - Xiang S AD - Department of Gastroenterology, Shanghai Tongren Hospital, Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China. Electronic address: drxiangshtj@163.com. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20190808 PL - United States TA - Biochem Biophys Res Commun JT - Biochemical and biophysical research communications JID - 0372516 RN - 0 (Cytokines) RN - 0 (Inflammation Mediators) RN - 0 (RNA, Small Interfering) RN - 0 (TNF Receptor-Associated Factor 3) RN - 888Y08971B (Ceruletide) RN - EC 2.7.11.24 (p38 Mitogen-Activated Protein Kinases) RN - EC 2.7.12.2 (MAP Kinase Kinase 3) RN - EC 3.6.1.- (rab21 protein, mouse) RN - EC 3.6.5.2 (rab GTP-Binding Proteins) SB - IM MH - Acinar Cells/metabolism/pathology MH - Acute Disease MH - Animals MH - Cell Death MH - Ceruletide MH - Cytokines/metabolism MH - Enzyme Activation MH - Inflammation/metabolism/pathology MH - Inflammation Mediators/metabolism MH - MAP Kinase Kinase 3/*metabolism MH - Macrophages/metabolism MH - Mice, Inbred C57BL MH - Mice, Knockout MH - Pancreas/pathology MH - Pancreatitis/*metabolism/pathology MH - RNA, Small Interfering/metabolism MH - TNF Receptor-Associated Factor 3/*metabolism MH - p38 Mitogen-Activated Protein Kinases/*metabolism MH - rab GTP-Binding Proteins/*metabolism OTO - NOTNLM OT - Acute pancreatitis OT - Caerulin OT - Pro-inflammatory response OT - Rab21 OT - TRAF3-MKK3-p38 cascade EDAT- 2019/08/14 06:00 MHDA- 2020/06/02 06:00 CRDT- 2019/08/13 06:00 PHST- 2019/07/25 00:00 [received] PHST- 2019/08/02 00:00 [accepted] PHST- 2019/08/14 06:00 [pubmed] PHST- 2020/06/02 06:00 [medline] PHST- 2019/08/13 06:00 [entrez] AID - S0006-291X(19)31509-8 [pii] AID - 10.1016/j.bbrc.2019.08.007 [doi] PST - ppublish SO - Biochem Biophys Res Commun. 2019 Oct 8;518(1):50-58. doi: 10.1016/j.bbrc.2019.08.007. Epub 2019 Aug 8.