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Fang X, Hu H, Xie J, Zhu H, Zhang D, Mo W, Zhang R, Yu M. An involvement of neurokinin-1 receptor in FcεRΙ-mediated RBL-2H3 mast cell activation. Inflamm Res 2012; 61:1257-63. [PMID: 22820943 PMCID: PMC3472057 DOI: 10.1007/s00011-012-0523-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2012] [Revised: 06/02/2012] [Accepted: 06/28/2012] [Indexed: 12/29/2022] Open
Abstract
OBJECTIVE AND DESIGN To determine whether the neurokinin-1 receptor (NK1R) plays a role in the activation of RBL-2H3 mast cells after FcεRΙ aggregation. MATERIALS AND METHODS NK1R expression in RBL-2H3 cells was inhibited by small hairpin RNA (shRNA) against NK1R, and determined by western blotting. For activation, both NK1R knockdown and control RBL-2H3 cells were sensitized by dinitrophenol (DNP)-specific IgE and stimulated with the antigen DNP-bovine serum albumin (BSA). Following the activation of RBL-2H3 cells, monocyte chemoattractant protein (MCP-1) production and intracellular calcium flux were monitored by ELISA and confocal microscopy assay, respectively. For investigation of the signaling mechanism, phosphorylation of mitogen-activated protein kinases (MAPKs) after RBL-2H3 cell activation was assessed by western blotting. RESULTS shRNA-NK1R mediated an effective inhibition of NK1R expression in RBL-2H3 cells. Protein production of MCP-1 was reduced by more than 55 % in NK1R knockdown RBL-2H3 cells compared with control RBL-2H3 cells. In addition, both calcium mobilization and phosphorylation levels of MAPKs (Erk1/2, JNK, and p38) after DNP-BSA stimulation (via FcεRΙ) were decreased due to the inhibition of NK1R expression. CONCLUSION NK1R is required for the activation of RBL-2H3 cells following FcεRΙ engagement and involved in the regulation of MAPK signaling pathways.
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Affiliation(s)
- Xiaoyun Fang
- The Key Laboratory of Molecular Medicine, Ministry of Education, Shanghai, 200032 People’s Republic of China
- Department of Biochemistry and Molecular Biology, Shanghai Medical College, Fudan University, Shanghai, 200032 People’s Republic of China
| | - Hua Hu
- Department of Otolaryngology, Huadong Hospital of Shanghai Medical College, Fudan University, Shanghai, 200032 People’s Republic of China
- Department of Otolaryngology, EENT Hospital of Shanghai Medical College, Fudan University, Shanghai, 200032 People’s Republic of China
| | - Jianhui Xie
- Department of Biochemistry and Molecular Biology, Shanghai Medical College, Fudan University, Shanghai, 200032 People’s Republic of China
| | - Haiyan Zhu
- Department of Biochemistry and Molecular Biology, Shanghai Medical College, Fudan University, Shanghai, 200032 People’s Republic of China
| | - Dongmei Zhang
- Department of Biochemistry and Molecular Biology, Shanghai Medical College, Fudan University, Shanghai, 200032 People’s Republic of China
| | - Wei Mo
- The Key Laboratory of Molecular Medicine, Ministry of Education, Shanghai, 200032 People’s Republic of China
- Department of Biochemistry and Molecular Biology, Shanghai Medical College, Fudan University, Shanghai, 200032 People’s Republic of China
| | - Ruxin Zhang
- Department of Otolaryngology, Huadong Hospital of Shanghai Medical College, Fudan University, Shanghai, 200032 People’s Republic of China
| | - Min Yu
- The Key Laboratory of Molecular Medicine, Ministry of Education, Shanghai, 200032 People’s Republic of China
- Department of Biochemistry and Molecular Biology, Shanghai Medical College, Fudan University, Shanghai, 200032 People’s Republic of China
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