PMID- 29110610 OWN - NLM STAT- MEDLINE DCOM- 20180718 LR - 20180718 IS - 1875-5666 (Electronic) IS - 1566-5240 (Linking) VI - 17 IP - 4 DP - 2017 Dec 7 TI - VEGFR1 Signaling Regulates IL-4-Mediated Arginase 1 Expression in Macrophages. PG - 304-311 LID - 10.2174/1566524017666171106114537 [doi] AB - BACKGROUND: Macrophages undergo polarization or activation in response to environmental stimuli, an essential process for proper immune response. Meanwhile, excessive activation of macrophages causes autoimmune diseases. It is therefore crucial to prevent over-activation of macrophage in order to maintain the proper immune response. Arginase 1 (Arg-1) plays a critical role in coordinating the immune response by regulating availability of arginine. OBJECTIVE: To understand the mechanism of Arg-1 regulation. METHODS: Real-time PCR and Western Blot analysis were utilized to examine the Arg-1 levels expressed from the VEGFR1-deleted and VEGFR1-TK-deficient bone marrowderived macrophages (BMDMs). RESULTS: The VEGFR1-mediated signaling suppressed IL-4-induced Arg-1 expression. Deletion of VEGFR1 resulted in elevated Arg-1 expression and the tyrosine kinase domain of VEGFR1 was required for the suppression. Each of three ligands of VEGFR1, VEGF-A, VEGF-B and PIGF, mediated the inhibition to the similar degree. CONCLUSION: Our findings identified a novel function of the VEGFR1 signaling in avoiding over-expression of Arginase 1 potentially to maintain the proper innate immune response. CI - Copyright(c) Bentham Science Publishers; For any queries, please email at epub@benthamscience.org. FAU - Zou, Y AU - Zou Y AD - The State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China. FAU - Chen, Q AU - Chen Q AD - The State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China. FAU - Ye, Z AU - Ye Z AD - The State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China. FAU - Li, X AU - Li X AD - The State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China. FAU - Ju, R AU - Ju R AD - The State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China. LA - eng PT - Journal Article PL - Netherlands TA - Curr Mol Med JT - Current molecular medicine JID - 101093076 RN - 207137-56-2 (Interleukin-4) RN - EC 2.7.10.1 (Vascular Endothelial Growth Factor Receptor-1) RN - EC 3.5.3.1 (Arg1 protein, mouse) RN - EC 3.5.3.1 (Arginase) SB - IM MH - Animals MH - Arginase/genetics/*immunology MH - Gene Deletion MH - Gene Expression Regulation, Enzymologic/*immunology MH - Immunity, Innate MH - Interleukin-4/genetics/*immunology MH - Macrophages/cytology/*metabolism MH - Mice MH - Mice, Transgenic MH - Signal Transduction/genetics/*immunology MH - Vascular Endothelial Growth Factor Receptor-1/genetics/*immunology OTO - NOTNLM OT - Vascular endothelial growth factor receptor 1 (VEGFR1) OT - arginase 1 (Arg-1) OT - immune response OT - interleukin 4 (IL-4) OT - macrophage EDAT- 2017/11/08 06:00 MHDA- 2018/07/19 06:00 CRDT- 2017/11/08 06:00 PHST- 2017/03/18 00:00 [received] PHST- 2017/10/14 00:00 [revised] PHST- 2017/10/30 00:00 [accepted] PHST- 2017/11/08 06:00 [pubmed] PHST- 2018/07/19 06:00 [medline] PHST- 2017/11/08 06:00 [entrez] AID - CMM-EPUB-86690 [pii] AID - 10.2174/1566524017666171106114537 [doi] PST - ppublish SO - Curr Mol Med. 2017 Dec 7;17(4):304-311. doi: 10.2174/1566524017666171106114537.