| 2010 |
ORMDL3 overexpression increases resting cytosolic Ca2+ levels and reduces ER-mediated Ca2+ signaling; co-expression with SERCA (sarco-endoplasmic reticulum Ca2+ pump) reverses this effect, supporting a model in which ORMDL3 binds and inhibits SERCA. siRNA knockdown of ORMDL3 potentiates ER Ca2+ release and attenuates the UPR. |
Heterologous overexpression, siRNA knockdown, Ca2+ measurements, co-expression rescue assay in mammalian cells |
Human molecular genetics |
Medium |
19819884
|
| 2012 |
ORMDL3 negatively modulates Ca2+-release-activated Ca2+ currents (ICRAC), store-operated calcium entry (SOCE), NFAT nuclear translocation, and IL-2 production in T lymphocytes. Mechanistically, ORMDL3 inhibits Ca2+ influx at the outer mitochondrial membrane, leading to Ca2+-dependent inhibition of ICRAC; the effect is mimicked by reducing mitochondrial Ca2+ uptake and reversed by cytosolic Ca2+ buffering. |
Patch-clamp electrophysiology (ICRAC measurement), SOCE assays, NFAT reporter, IL-2 ELISA, mitochondrial Ca2+ manipulation, overexpression and knockdown in T lymphocytes |
Human molecular genetics |
High |
23100328
|
| 2012 |
Transfection of ORMDL3 in human bronchial epithelial cells induces expression of metalloproteases (MMP-9, ADAM-8), chemokines (CCL-20, IL-8, CXCL-10, CXCL-11), OAS genes, and selectively activates the ATF6 branch of the UPR. siRNA knockdown of ATF6α inhibits SERCA2b expression; conversely, ORMDL3 transfection activates ATF6α and induces SERCA2b. In mice, allergen challenge induces ORMDL3 in bronchial epithelium in a STAT-6-dependent manner. |
Transfection (overexpression), siRNA knockdown, qPCR, immunoblot; STAT-6 KO mice for in vivo pathway placement |
Proceedings of the National Academy of Sciences of the United States of America |
High |
23011799
|
| 2013 |
ORMDL3 expression in eosinophils is localized to the endoplasmic reticulum and is induced by IL-3 and eotaxin-1. Overexpression of ORMDL3 increases eosinophil rolling, ERK1/2 phosphorylation, NF-κB nuclear translocation, and CD48-mediated degranulation. Knockdown of ORMDL3 inhibits activation-induced cell shape changes, adhesion, in vivo recruitment, and reduces expression of integrins CD49d and CD18. |
Overexpression, siRNA knockdown, flow cytometry, ERK/NF-κB immunoblot, intravital microscopy, in vivo recruitment assay, ER localization by confocal |
Nature communications |
High |
24056518
|
| 2014 |
Mice universally overexpressing human ORMDL3 (hORMDL3zp3-Cre) develop increased airway remodeling (smooth muscle, fibrosis, mucus), spontaneous airway hyperresponsiveness, and elevated IgE. This is associated with selective activation of ATF6 (but not IRE1 or PERK) and strong induction of SERCA2b and TGF-β1/ADAM8; airway remodeling precedes inflammation. |
Transgenic mouse model (hORMDL3zp3-Cre), lung function measurement, histology, qPCR, immunoblot; UPR pathway-specific readouts |
Journal of immunology |
High |
24623133
|
| 2015 |
ORMDL3 forms stable complexes with serine palmitoyltransferase (SPT) that are not increased by elevated ORMDL3 expression, suggesting ORMDL is expressed in functional excess relative to SPT. Elevated ORMDL3 expression does not suppress de novo sphingolipid biosynthesis in human bronchial epithelial cells or HeLa cells, though steady-state sphingolipid mass levels are marginally decreased at low overexpression levels. |
Co-immunoprecipitation (ORMDL3-SPT complex), isotope-labeling sphingolipid biosynthesis assay, overexpression in HBECs and HeLa cells, mass spectrometry lipidomics |
Journal of lipid research |
Medium |
25691431
|
| 2015 |
Higher levels of ORMDL3 expression in lung epithelial cells and macrophages increase ceramide production (in vitro and in vivo), promoting chronic inflammation, airway hyperresponsiveness, and mucus production. Small increases in ORMDL3 decrease ceramide levels, while high overexpression increases them, indicating complex dose-dependent regulation of ceramide homeostasis. |
Overexpression and KD in epithelial cells and macrophages, house-dust-mite mouse model, mass spectrometry lipidomics, FTY720 pharmacological rescue |
The Journal of allergy and clinical immunology |
Medium |
25842287
|
| 2015 |
ORMDL3 negatively regulates FcεRI-triggered NF-κB signaling in mast cells: reduced ORMDL3 expression enhances AKT (Ser473) phosphorylation, IκBα phosphorylation/degradation, NF-κB p65 nuclear translocation, and upregulates TNF-α, IL-6, IL-13, CCL3, CCL4, and COX-2-dependent prostaglandin D2. Reduced ORMDL3 also enhances antigen-mediated chemotaxis but decreases fibronectin spreading. In vivo, locally silenced ORMDL3 increases IgE-dependent passive cutaneous anaphylaxis. |
siRNA knockdown and overexpression in murine mast cells, immunoblotting, ELISA, in vivo PCA model |
Cellular and molecular life sciences |
Medium |
26407610
|
| 2016 |
Ormdl3 knockout mice are protected from Alternaria-induced allergic airways disease (reduced airway function impairment and eosinophilia). ORMDL3 drives the ATF6-mediated UPR arm through XBP1 and downstream ER-associated degradation pathway activation. ORMDL3 also mediates uric acid release (a cellular stress marker). Reconstitution of ORMDL3 specifically in bronchial epithelium of knockout mice reinstates susceptibility to allergen-induced disease. |
Ormdl3 knockout mouse, adeno-associated viral reconstitution in airway epithelium, lung function measurement, histology, eosinophil counts, UPR gene expression |
The Journal of allergy and clinical immunology |
High |
27623174
|
| 2017 |
Epithelial-selective ORMDL3 knockout mice (Ormdl3 epithelial-specific KO) challenged with OVA show unexpectedly increased airway hyperresponsiveness compared to wild-type. Sphingosine-1-phosphate (S1P) levels are significantly elevated in these mice and in airway epithelial cells after ORMDL3 siRNA knockdown. S1P directly increases airway smooth muscle contractility. This reveals that ORMDL3 in airway epithelium normally suppresses S1P generation. |
Cre-lox epithelial-specific KO mouse, OVA challenge, airway responsiveness measurement, S1P mass spectrometry, siRNA in vitro, smooth muscle contractility assay with exogenous S1P |
Journal of immunology |
High |
28275141
|
| 2017 |
ORMDL3 expression in airway smooth muscle (ASM) increases ASM proliferation and contractility in vitro. In precision-cut lung slices from hORMDL3Zp3-Cre mice (without airway inflammation), increased ORMDL3 increases ASM Ca2+ oscillations and airway contractility. Increased ORMDL3 in ASM elevates SERCA2b, which mediates the proliferation and contractility effects. |
In vitro ASM transfection, ORMDL3 transgenic mouse PCLS assay, Ca2+ imaging, BrdU proliferation assay, SERCA2b knockdown/overexpression |
The Journal of allergy and clinical immunology |
Medium |
28889952
|
| 2017 |
ORMDL3 facilitates B cell survival via an ATF6α-ER stress-Beclin1 autophagy pathway. Ormdl3-/- mice have decreased mature B lymphocytes, transitional 2B cells, B1a cells, reduced IgG/IgM secretion, and Baff expression; increased apoptosis of splenic CD19+ B cells. In vitro and in vivo experiments show ORMDL3 promotes autophagy through ATF6-Beclin1, suppressing apoptosis. |
Ormdl3 knockout mouse, flow cytometry, Annexin V apoptosis assay, autophagy markers (Beclin1), ATF6 pathway knockdown/overexpression |
Journal of immunology |
Medium |
28747345
|
| 2018 |
AhR ligands promote ORMDL3-dependent S1P generation by inhibiting S1P lyase (S1PL). Mechanistically, AhR-mediated oxidation of S1PL at residue C317 inactivates S1PL; ORMDL3 knockdown prevents this AhR-mediated effect. A time-dependent increase in the ORMDL3-S1PL protein complex was detected, confirmed by FRET analysis. Cells expressing C317A S1PL mutant are resistant to AhR-mediated S1PL inhibition. |
FRET, co-immunoprecipitation, site-directed mutagenesis (C317A S1PL), S1PL activity assay, ORMDL3 siRNA knockdown, mast cell degranulation assay |
Cellular & molecular immunology |
High |
29572542
|
| 2019 |
ORMDL3 knockdown reduces IL-6 and IL-8 release and ER stress after IL-1B stimulation in A549 cells; overexpression and myriocin (SPT inhibitor) augment cytokine release. ORMDL3 knockdown strongly reduces ICAM1 expression (the rhinovirus receptor), and alters glycolytic transcripts and metabolites, ceramide, and sphingosine-1-phosphate levels. |
siRNA knockdown, overexpression, cytokine ELISA, transcriptomics, metabolomics (ceramide/S1P), myriocin pharmacology; replicated in normal human bronchial epithelial cells |
American journal of respiratory and critical care medicine |
High |
30339462
|
| 2019 |
ORMDL3 overexpression in mice reduces allergen-induced lung ceramide increases (while ORMDL3 deficiency increases systemic ceramide and sphingolipid levels in liver and serum), establishing that ORMDL3 regulates systemic ceramide homeostasis in vivo. Despite these ceramide changes, all hallmark asthma features are identical between wild-type, ORMDL3 transgenic, and ORMDL3 KO mice across multiple allergen models. |
Ormdl3-/- KO and Ormdl3Tg/wt transgenic mice; HDM and Alternaria asthma models; mass spectrometry sphingolipidomics, airway eosinophilia, AHR measurement |
The Journal of allergy and clinical immunology |
High |
31330218
|
| 2019 |
ORMDL3 overexpression impairs airway barrier function: it increases epithelial permeability, reduces TEER, downregulates junctional proteins (Claudin-18, E-cadherin), and induces SPHK1 activity and distribution. SPHK1 inhibition rescues TEER loss caused by ORMDL3 overexpression. ERK activation occurs downstream of SPHK1 in this pathway. |
Overexpression/inhibition in 16HBE cells and in vivo OVA-RSV mouse model, TEER measurement, permeability assay, SPHK1 inhibitor rescue, ERK immunoblot |
International journal of molecular medicine |
Medium |
31173170
|
| 2021 |
ORMDL3 expression in airway smooth muscle induces ASM hypertrophy, hyperplasia (BrdU incorporation), and increased contractility. Overexpression elevates tropomyosin TPM1 and TPM4; siRNA knockdown of TPM1 or TPM4 demonstrates their requirement for ORMDL3-mediated ASM proliferation (but not hypertrophy). Increased contractility is associated with elevated intracellular Ca2+, increased Orai1 Ca2+ channels on cell surface, and upregulation of SERCA2b and smooth muscle 22. |
Smooth muscle-selective ORMDL3 transgenic mice (hORMDL3Myh11eGFP-cre), FACS, BrdU, Ca2+ imaging, contractility assay, siRNA TPM1/4 knockdown |
JCI insight |
High |
33661765
|
| 2021 |
ORMDL3 suppresses antigen-mediated mast cell activation via an ATF6-UPR-autophagy pathway: ORMDL3 overexpression inhibits degranulation and cytokine/chemokine production; knockdown has opposite effects. ORMDL3 overexpression upregulates SERCA2b, ATF6, Beclin1, and LC3BII. Knockdown of ATF6 or inhibition of autophagy reverses the suppression conferred by ORMDL3 overexpression. In vivo ORMDL3 and ATF6 knockdown enhances passive cutaneous anaphylaxis. |
Overexpression and siRNA knockdown in MC/9 cells, ATF6 siRNA epistasis, autophagy inhibitors, in vivo PCA mouse model |
Frontiers in immunology |
Medium |
33679742
|
| 2021 |
ORMDL3 physically interacts with 5-lipoxygenase (5-LO) in ER domains of human mast cells; both also interact with the SPTLC1 subunit of SPT. ORMDL3 KO mast cells show increased leukotriene production (LTB4, LTC4, etc.) in addition to increased sphingolipids, establishing functional crosstalk between sphingolipid and eicosanoid (leukotriene) metabolic pathways. |
Co-immunoprecipitation (ORMDL3-5-LO and 5-LO-SPTLC1), ORMDL3/5-LO KO peritoneal mast cells, lipidomics (sphingolipids and LTs), siRNA knockdown of 5-LO and SPTLC1 |
Journal of lipid research |
Medium |
34560079
|
| 2021 |
Ormdl3-/- mice have impaired BAT thermogenesis and WAT browning, with elevated ceramide levels in adipose tissue. The reduction in UCP1-mediated thermogenesis and increased weight caused by Ormdl3 deficiency is rescued by pharmacological inhibition of ceramide production, placing ORMDL3 upstream of ceramide in regulating adipose thermogenesis. |
Ormdl3-/- knockout mice, cold exposure, β3 adrenergic agonist challenge, primary adipocyte cultures, mass spectrometry lipidomics, ceramide synthesis inhibitor rescue |
Molecular metabolism |
Medium |
34954108
|
| 2022 |
ORMDL3 overexpression in bronchial epithelial cells promotes autophagy (increased autophagosomes, elevated LC3B, ATG3, ATG7, ATG16L1) and subsequent cell death by impairing intracellular calcium mobilization through interaction with SERCA2. Immunoprecipitation confirms the ORMDL3-SERCA2 interaction. |
ORMDL3 overexpression in 16HBE and primary HBECs, electron microscopy (autophagosome detection), RFP-GFP-LC3B autophagic flux assay, immunoprecipitation (ORMDL3-SERCA2), intracellular Ca2+ assay, cell viability, coexpression analysis in 44 donors |
American journal of respiratory cell and molecular biology |
High |
35353673
|
| 2024 |
ORMDL3 regulates NLRP3 inflammasome activation in human macrophages by modulating mitochondrial morphology and ER-mitochondria contacts. ORMDL3 overexpression increases mitochondrial fragmentation and ER-mitochondria contacts, enabling efficient NLRP3 inflammasome activation and IL-1β release; knockdown reduces IL-1β. Under inflammatory conditions, ORMDL3 localizes to mitochondria-associated membranes and mitochondria (in addition to ER) and interacts with the mitochondrial fission protein Fis-1. |
ORMDL3 knockdown in human monocyte-derived macrophages, co-immunoprecipitation (ORMDL3-Fis-1), subcellular fractionation/localization, mitochondrial morphology imaging, NLRP3 inflammasome activity assay (IL-1β release), DSS colitis mouse model |
The Journal of biological chemistry |
High |
38417794
|
| 2025 |
ORMDL3 negatively regulates type I IFN signaling by interacting with MAVS and promoting proteasome-mediated degradation of RIG-I. IP-MS reveals ORMDL3 binds USP10, a deubiquitinase that stabilizes RIG-I by reducing K48-linked ubiquitination; ORMDL3 disrupts the USP10-RIG-I interaction, leading to RIG-I degradation. In vivo, ORMDL3 inhibition in syngeneic tumor models augments CD8+ T cells and IFN production in the tumor microenvironment. |
Co-immunoprecipitation, IP coupled with mass spectrometry (IP-MS), ubiquitination assays (K48-linked), proteasome inhibitor rescue, overexpression/knockdown, syngeneic subcutaneous tumor model in C57BL/6 mice |
eLife |
High |
40126553
|
| 2012 |
The ORMDL3 gene promoter is cooperatively regulated by transcription factors Ets-1, p300, and CREB, which bind the proximal minimal promoter (-84/+58). Chromatin immunoprecipitation and sequential ChIP confirm co-occupancy; siRNA knockdown of each factor reduces ORMDL3 expression. |
5'-RACE, 5' deletion luciferase reporter assays, mutagenesis, EMSA, ChIP/Re-ChIP, RNA interference |
The international journal of biochemistry & cell biology |
Medium |
22546552
|
| 2013 |
STAT6 directly regulates ORMDL3 transcription by binding a -64 to -56 bp motif in the minimal promoter. EMSA and ChIP confirm STAT6 binding; IL-4 and IL-13 treatment increase ORMDL3 promoter activity and endogenous expression. STAT6 and p300 co-occupy the ORMDL3 promoter as a complex (confirmed by IP and ChIP/Re-ChIP). |
Luciferase reporter (deletion/mutation analysis), EMSA, ChIP, co-immunoprecipitation (STAT6-p300 complex), siRNA knockdown and overexpression, cytokine stimulation |
The FEBS journal |
Medium |
23461825
|
| 2013 |
The cAMP/PKA/CREB pathway regulates basal ORMDL3 transcription through a CRE element (-27/-20) in the core promoter. CREB binding is confirmed by EMSA and ChIP; CREB knockdown reduces ORMDL3 expression, overexpression increases it. Forskolin (PKA activator) increases CREB phosphorylation and ORMDL3 expression; H-89 (PKA inhibitor) reduces it. |
Luciferase reporter (deletion/mutation), EMSA, ChIP, siRNA and overexpression, forskolin/H-89 pharmacology in NIH3T3 cells |
PloS one |
Medium |
23577138
|
| 2015 |
Cbl-b (E3 ubiquitin ligase) suppresses ORMDL3 expression by reducing STAT6 phosphorylation, thereby decreasing STAT6 binding to the ORMDL3 promoter. ChIP and promoter assays confirm that IL-4-induced STAT6 phosphorylation drives ORMDL3 transcription, and Cbl-b counteracts this. |
Luciferase reporter, ChIP, immunoblot (STAT6 phosphorylation), Cbl-b siRNA and overexpression |
FEBS letters |
Medium |
26112603
|
| 2017 |
IRF-3 directly binds the ORMDL3 promoter at a proximal IRF-3 binding site following RSV infection, driving ORMDL3 transcription. Mutational analysis of the binding site, overexpression, siRNA knockdown of IRF-3, EMSA, and ChIP confirm IRF-3 as a direct transcriptional regulator of ORMDL3 after RSV infection. |
Luciferase reporter (mutation analysis), EMSA, ChIP, IRF-3 siRNA and overexpression in bronchial epithelial cells and lung fibroblasts, clinical sample correlation |
The international journal of biochemistry & cell biology |
Medium |
28336364
|
| 2018 |
STING positively regulates ORMDL3 expression through a TBK1-IRF3-STAT6 complex: STING activation enhances TBK1-mediated phosphorylation of both IRF3 and STAT6, which then bind the ORMDL3 promoter cooperatively to upregulate expression. |
Luciferase reporter, immunoprecipitation (STING-TBK1-IRF3-STAT6 complex), ChIP, siRNA knockdown, STING overexpression |
Experimental cell research |
Medium |
30009792
|
| 2019 |
p300-mediated histone acetylation of the ORMDL3 promoter (H3 acetylation) activates ORMDL3 transcription in asthma. In asthmatic mice, p300 and acetylated H3 are enriched at the ORMDL3 promoter (by ChIP). HAT-dead p300 mutant fails to activate ORMDL3. C646 (p300 inhibitor) reduces ORMDL3 expression and airway remodeling. |
ChIP (p300, aceH3 at ORMDL3 promoter), luciferase reporter with WT and HAT-deletion p300 mutants, C646 pharmacology in OVA-asthma mouse model, immunohistochemistry, qPCR/Western blot |
International immunopharmacology |
Medium |
31536903
|
| 2021 |
ORMDL3 overexpression facilitates FcεRI-mediated transcription of IL-4, TNF-α, and MCP-1 in RBL-2H3 mast cells (without affecting degranulation or MAPK phosphorylation), and this enhancement is suppressed by the S1P agonist FTY720. ORMDL3 overexpression also accelerates TG (thapsigargin)-induced PERK phosphorylation, selectively affecting the PERK branch of the UPR. |
Stable ORMDL3 overexpressing RBL-2H3 cells, FcεRI crosslinking, cytokine qPCR, degranulation assay, MAPK and PERK phosphorylation immunoblot, FTY720 pharmacology |
Immunity, inflammation and disease |
Medium |
34288557
|
| 2021 |
ORMDL3 knockdown in human airway smooth muscle cells reduces CSM (cigarette smoke medium)-induced ER stress (inhibiting ATF6 and PERK UPR pathways), and attenuates CSM-induced inflammation, cell proliferation, and apoptosis. ORMDL3 is also involved in CSM-induced mitochondrial dysfunction via the mitochondrial fission process. |
siRNA knockdown of ORMDL3 in primary HASMCs, CSM treatment, UPR pathway immunoblot (ATF6, PERK), inflammation/proliferation/apoptosis assays, mitochondrial morphology assessment |
The Journal of allergy and clinical immunology |
Medium |
34624393
|
| 2023 |
ORMDL3 overexpression activates NLRP3 inflammasome expression in bronchial epithelial cells; RSV infection induces ORMDL3 overexpression through histone hyperacetylation (p300-mediated), which in turn drives NLRP3 inflammasome upregulation. p300 and acetylated H3 bind the ORMDL3 promoter (ChIP). C646 (p300 inhibitor) reduces ORMDL3 and NLRP3 expression and alleviates lung inflammation in rRSV+OVA asthma mice. |
BEAS-2B cells, RSV infection, ORMDL3 siRNA and overexpression, NLRP3 immunoblot/qPCR, ChIP (p300, aceH3 at ORMDL3 promoter), C646 pharmacology, in vivo rRSV+OVA mouse model |
Journal of cellular physiology |
Medium |
37877592
|