PMID- 34288557 OWN - NLM STAT- MEDLINE DCOM- 20211203 LR - 20220531 IS - 2050-4527 (Electronic) IS - 2050-4527 (Linking) VI - 9 IP - 4 DP - 2021 Dec TI - ORMDL3 overexpression facilitates FcepsilonRI-mediated transcription of proinflammatory cytokines and thapsigargin-mediated PERK phosphorylation in RBL-2H3 cells. PG - 1394-1405 LID - 10.1002/iid3.489 [doi] AB - INTRODUCTION: The chromosomal region 17q21 harbors the human orosomucoid-like 3 (ORMDL3) gene and has been linked to asthma and other inflammatory diseases. ORMDL3 is involved in the unfolded protein response (UPR), lipid metabolism, and inflammatory reactions. We investigated the effects of ORMDL3 overexpression in RBL-2H3 cells to determine the contribution of ORMDL3 to inflammatory disease development. METHODS: We generated ORMDL3 stably overexpressing RBL-2H3 cells to assess degranulation, transcriptional upregulation of interleukin-4 (IL-4), tumor necrosis factor-alpha (TNF-alpha), monocyte chemoattractant protein-1 (MCP-1), and mitogen-activated protein kinase (MAPK) phosphorylation via FcepsilonRI. In addition, we examined the effects of ORMDL3 overexpression on thapsigargin (TG)-mediated proinflammatory cytokine transcription and UPR by monitoring MAPK, protein kinase-like endoplasmic reticulum kinase (PERK), and inositol-requiring enzyme 1 (IRE1) phosphorylation. RESULTS: Overexpression of ORMDL3 enhanced IL-4, TNF-alpha, and MCP-1 expression after FcepsilonRI cross-linking, whereas the sphingosine-1-phosphate (S1P) agonist FTY720 suppressed this enhancement. There was no significant difference in degranulation and MAPK phosphorylation via FcepsilonRI-mediated activation between vector-transfected and ORMDL3-overexpressing cells. ORMDL3 overexpression accelerated TG-mediated PERK phosphorylation, while MAPK phosphorylation and proinflammatory cytokine expression showed no significant changes in ORMDL3-overexpressing cells. CONCLUSIONS: Our findings suggest that ORMDL3 plays an important role in regulating proinflammatory cytokine expression via the S1P pathway and selectively affects the UPR pathway in mast cells. CI - (c) 2021 The Authors. Immunity, Inflammation and Disease published by John Wiley & Sons Ltd. FAU - Ogi, Kazuhiro AU - Ogi K AUID- ORCID: 0000-0002-7358-7784 AD - Division of Otorhinolaryngology Head and Neck Surgery, Department of Sensory and Locomotor Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan. FAU - Takabayashi, Tetsuji AU - Takabayashi T AD - Division of Otorhinolaryngology Head and Neck Surgery, Department of Sensory and Locomotor Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan. FAU - Tomita, Kaori AU - Tomita K AD - Division of Otorhinolaryngology Head and Neck Surgery, Department of Sensory and Locomotor Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan. FAU - Sakashita, Masafumi AU - Sakashita M AD - Division of Otorhinolaryngology Head and Neck Surgery, Department of Sensory and Locomotor Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan. FAU - Morikawa, Taiyo AU - Morikawa T AD - Division of Otorhinolaryngology Head and Neck Surgery, Department of Sensory and Locomotor Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan. FAU - Ninomiya, Takahiro AU - Ninomiya T AD - Division of Otorhinolaryngology Head and Neck Surgery, Department of Sensory and Locomotor Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan. FAU - Okamoto, Masayuki AU - Okamoto M AD - Division of Otorhinolaryngology Head and Neck Surgery, Department of Sensory and Locomotor Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan. FAU - Narita, Norihiko AU - Narita N AD - Division of Otorhinolaryngology Head and Neck Surgery, Department of Sensory and Locomotor Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan. FAU - Fujieda, Shigeharu AU - Fujieda S AD - Division of Otorhinolaryngology Head and Neck Surgery, Department of Sensory and Locomotor Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20210719 PL - England TA - Immun Inflamm Dis JT - Immunity, inflammation and disease JID - 101635460 RN - 0 (Cytokines) RN - 0 (Membrane Proteins) RN - 0 (ORMDL3 protein, human) RN - 0 (Orosomucoid) RN - 0 (Receptors, IgE) RN - 67526-95-8 (Thapsigargin) SB - IM MH - Cell Degranulation MH - *Cytokines/metabolism MH - Endoplasmic Reticulum/metabolism MH - Humans MH - Membrane Proteins/genetics/metabolism MH - Orosomucoid MH - Phosphorylation MH - *Receptors, IgE/genetics MH - Thapsigargin/pharmacology PMC - PMC8589398 OTO - NOTNLM OT - FTY720 OT - ORMDL3 OT - S1P OT - UPR OT - mast cell COIS- The authors declare that there are no conflict of interests. EDAT- 2021/07/22 06:00 MHDA- 2021/12/15 06:00 PMCR- 2021/07/19 CRDT- 2021/07/21 13:53 PHST- 2021/07/01 00:00 [revised] PHST- 2021/02/12 00:00 [received] PHST- 2021/07/05 00:00 [accepted] PHST- 2021/07/22 06:00 [pubmed] PHST- 2021/12/15 06:00 [medline] PHST- 2021/07/21 13:53 [entrez] PHST- 2021/07/19 00:00 [pmc-release] AID - IID3489 [pii] AID - 10.1002/iid3.489 [doi] PST - ppublish SO - Immun Inflamm Dis. 2021 Dec;9(4):1394-1405. doi: 10.1002/iid3.489. Epub 2021 Jul 19.