| 1995 |
GPNMB (nmb) was originally identified as a novel gene encoding a putative transmembrane glycoprotein with homology to the pMEL17 melanocyte-specific protein precursor, preferentially expressed in low-metastatic human melanoma cell lines; transfection of partial nmb cDNA into highly metastatic melanoma cells reduced subcutaneous tumor growth and metastatic potential in nude mice. |
Subtractive cDNA library, transfection/overexpression in vivo xenograft model |
International journal of cancer |
Medium |
7814155
|
| 2007 |
GPNMB (Osteoactivin) acts as a negative regulator of macrophage inflammatory responses: overexpression in RAW264.7 cells reduced LPS-induced IL-6, IL-12p40, and NO production; upon IFN-γ/LPS activation, GPNMB translocated from the Golgi apparatus (where it co-localized with coat protein beta) to peripheral vesicular compartments; DBA mice with an inactivating Gpnmb point mutation exhibited elevated proinflammatory cytokines in response to LPS. |
Epitope-tagged overexpression, co-localization imaging (Golgi marker), cytokine ELISA, DBA mutant mouse model |
Journal of immunology |
High |
17475886
|
| 2007 |
Osteoactivin/GPNMB promotes breast cancer bone metastasis; sustained GPNMB expression is required for invasion, and GPNMB overexpression elevates matrix metalloproteinase-3 (MMP-3) levels, while siRNA depletion of GPNMB reduces MMP-3 expression, identifying MMP-3 as a downstream mediator. |
siRNA knockdown, forced overexpression, in vivo bone metastasis model (4T1 mammary carcinoma), gene expression profiling |
Molecular cancer research : MCR |
High |
17951401
|
| 2008 |
GPNMB expression is directly transcriptionally regulated by microphthalmia transcription factor (MITF) via a conserved M-box binding site in the GPNMB promoter; EMSA identified MITF binding to this site, mutation abolished binding and transactivation, and kinetics of GPNMB induction during osteoclastogenesis paralleled known MITF targets acp5 and clcn7; GPNMB co-localized with lysosomal/endocytic marker MAC-3/LAMP-2 in mature macrophages. |
EMSA, reporter gene assay with promoter mutation, microarray expression profiling, immunofluorescence co-localization |
Gene |
High |
18313864
|
| 2008 |
Gpnmb is a MITF-dependent melanoblast-expressed gene; a conserved enhancer element (GPNMB-MCS3) containing two MITF consensus sites drives expression in melanoblasts in vivo, and deletion of the 5'-most MITF site dramatically reduces enhancer activity. |
Whole-genome MITF binding site annotation, luciferase reporter assay, transgenic in vivo enhancer analysis, Mitf mutant mouse expression studies |
Pigment cell & melanoma research |
High |
18983539
|
| 2010 |
ADAM10 is the sheddase responsible for proteolytic release of the GPNMB ectodomain (ECD) from breast cancer cell surfaces; siRNA-mediated knockdown of ADAM10 specifically blocked GPNMB ECD shedding, and the shed ECD promoted endothelial cell migration in vitro, identifying ectodomain shedding as a mechanism by which GPNMB promotes angiogenesis. |
Transient siRNA knockdown of candidate sheddases, immunoblot, ELISA, endothelial migration assay |
PloS one |
High |
20711474
|
| 2010 |
GPNMB (DC-HIL) expressed on melanoma cells inhibits activation of melanoma-reactive T cells by binding syndecan-4 (SD-4) on activated T cells; siRNA knockdown of GPNMB in B16F10 melanoma markedly reduced in vivo tumor growth in immunocompetent but not immunodeficient mice, and DC-HIL-knocked-down cells showed augmented capacity to activate melanoma-reactive T cells; blocking SD-4 enhanced CD8+ T cell reactivity to melanoma antigens. |
siRNA knockdown, in vivo tumor growth in immunocompetent vs. immunodeficient mice, T cell activation assays, SD-4 blocking experiments |
Cancer research |
High |
20570888
|
| 2010 |
GPNMB is a melanosomal protein enriched in mature (stage III-IV) melanosomes; it is released as a secreted form by ectodomain shedding from the largely Golgi-modified form, and the PKC and Ca2+ intracellular signaling pathways regulate GPNMB shedding. |
Subcellular fractionation, immunofluorescence, kinase inhibitor/signaling pathway pharmacology, ELISA for shed form |
FASEB journal |
High |
20056711
|
| 2012 |
GPNMB silencing by siRNA sharply reduced the total number of melanosomes in melanocytes and attenuated expression of melanosomal proteins tyrosinase, Trp1, Pmel17/gp100, and OA1, demonstrating that GPNMB is critical for melanosome formation; this effect was MITF-independent. UVB radiation upregulated GPNMB expression in melanocytes. |
siRNA knockdown, transmission electron microscopy (melanosome counting), Western blotting, qPCR, immunofluorescence |
PloS one |
High |
22912767
|
| 2012 |
GPNMB glycosylation is inhibited by interaction with mutant SOD1(G93A) in motor neurons, increasing their vulnerability; extracellular fragments of GPNMB secreted from activated astrocytes attenuate neurotoxicity of SOD1(G93A) in neural cells, indicating a neuroprotective paracrine role for secreted GPNMB. |
Co-expression studies in NSC34 cells, glycosylation assays, recombinant GPNMB treatment, neurotoxicity assays |
Scientific reports |
Medium |
22891158
|
| 2013 |
ET-1 (endothelin-1) triggers melanogenesis via the MITF-regulated GPNMB pathway: ET-1 increases MITF and GPNMB expression; siRNA knockdown of GPNMB reduces total melanosomes and melanin synthesis; siRNA knockdown of MITF suppresses GPNMB expression and ET-1-induced pigmentation, establishing GPNMB downstream of MITF in the ET-1 signaling axis. |
siRNA knockdown of GPNMB and MITF, melanin quantification, melanosome counting, Western blotting |
BMB reports |
Medium |
23884103
|
| 2013 |
GPNMB stimulates osteogenesis and angiogenesis via FGFR-1 signaling: recombinant GPNMB dose-dependently induced osteoblast differentiation (ALP, OCN expression) from human bone marrow stromal cells and promoted endothelial proliferation, migration, and tube formation; pretreatment with FGFR-1 siRNA or inhibitor SU5402 abolished these effects; in a rodent cranial defect model, GPNMB-delivering scaffolds increased bone and vessel formation, reversed by combined SU5402. |
Recombinant protein treatment, siRNA knockdown of FGFR-1, FGFR-1 inhibitor, in vitro differentiation assays, in vivo cranial defect model |
Journal of cellular biochemistry |
High |
23794283
|
| 2014 |
In obese adipose tissue macrophages, lysosomal stress (induced by palmitate, chloroquine, or mTORC1 inhibitor Torin1) causes MITF nuclear translocation, which is absolutely required for GPNMB induction; shRNA knockdown of MITF abolished Gpnmb upregulation; in vivo, reduced mTORC1 activity in obese mouse adipose tissue macrophages coincided with increased nuclear MITF and elevated Gpnmb transcription, placing GPNMB downstream of mTORC1-MITF in lysosomal stress response. |
shRNA knockdown of MITF, mTORC1 inhibition, nuclear MITF localization imaging, gene expression in isolated ATMs |
Diabetes |
High |
24789918
|
| 2014 |
GPNMB in LPS-activated microglia upregulates MMP-3 expression, which in turn promotes production of proinflammatory mediators (TNF-α, IL-1β, iNOS, NO); siRNA knockdown of GPNMB or MMP-3 inhibitor treatment suppressed these inflammatory mediators, establishing a GPNMB→MMP-3 axis in microglial inflammation. |
siRNA knockdown, MMP-3 inhibitor, ELISA for cytokines, RT-PCR and Western blotting |
Journal of molecular neuroscience : MN |
Medium |
24682924
|
| 2014 |
GPNMB neuroprotection in cerebral ischemia-reperfusion injury is associated with phosphorylation of ERK1/2 and Akt; GPNMB transgenic mice showed reduced infarct volume and increased p-ERK1/2 and p-Akt by Western blotting; recombinant GPNMB (extracellular sequence) also decreased infarction volume, indicating the neuroprotective effect is mediated by the extracellular domain. |
GPNMB transgenic mouse model, middle cerebral artery occlusion, Western blotting for p-ERK1/2/p-Akt, recombinant GPNMB treatment |
Neuroscience |
Medium |
25010402
|
| 2015 |
GPNMB cooperates with neuropilin-1 (NRP-1) to promote breast cancer tumor growth: GPNMB overexpression increases NRP-1 expression, potentiating VEGF signaling; NRP-1 is required for GPNMB-driven tumor growth but not metastasis. Additionally, GPNMB binds α5β1 integrin through its RGD motif, and this interaction activates Src and FAK signaling; RGD motif mutation impairs lung metastasis formation whereas both RGD motif and cytoplasmic tail are required for primary tumor growth. |
Forced overexpression, RNAseq, RGD motif mutagenesis, Co-IP/integrin complex pulldown, Src/FAK signaling assays, in vivo mammary tumor and metastasis models |
Oncogene |
High |
25772243
|
| 2015 |
GPNMB transcription in dendritic cells is regulated by MITF downstream of PI3K/Akt inhibition: IL-10 and BCR-ABL TKIs (imatinib, nilotinib) inhibit PI3K/Akt, activating GSK3β, which leads to MITF phosphorylation and nuclear translocation; a MITF activity inhibitor reduced GPNMB mRNA and protein; PI3K/Akt inhibition-induced GPNMB overexpression reduced moDC stimulatory capacity in MLRs, rescued by adding the GPNMB T cell ligand syndecan-4. |
Small molecule inhibitors, MITF inhibitor, mRNA/protein quantification, mixed lymphocyte reaction |
Cell communication and signaling : CCS |
Medium |
25889792
|
| 2015 |
Soluble Gpnmb ameliorated fat accumulation and fibrosis in obese liver in transgenic mice; Gpnmb concentrated in hepatic macrophages and stellate cells interacted with calnexin, which resulted in reduction of oxidative stress. |
Gpnmb transgenic mouse model (aP2 promoter), co-localization/interaction studies, oxidative stress assays |
Scientific reports |
Medium |
26581806
|
| 2016 |
Recombinant GPNMB promotes MSC survival, proliferation, and migration via CD44 receptor, activating downstream ERK and AKT signaling pathways; loss-of-function and rescue studies demonstrated that M2 macrophage-secreted GPNMB mediates these MSC responses via CD44. |
Recombinant GPNMB treatment, loss-of-function (siRNA/antibody blocking), rescue studies, Western blotting for ERK/AKT phosphorylation |
Journal of cellular biochemistry |
Medium |
26442636
|
| 2016 |
GPNMB promotes brain glioblastoma progression via interaction with Na+/K+-ATPase α subunits, activating PI3K/Akt and MEK/ERK pathways; the interaction was identified in murine glioma models and human GBM tumors; ouabain (Na+/K+-ATPase inhibitor) suppressed GPNMB-driven glioma growth and blocked GPNMB-induced glioma cell migration. |
Co-immunoprecipitation, transgenic GPNMB overexpression mouse glioma model, pharmacological inhibition with ouabain, migration assays |
Biochemical and biophysical research communications |
Medium |
27836549
|
| 2016 |
Recombinant GPNMB ameliorates motor neuron cell death induced by mutant TDP-43 (M337V, A315T) and serum-free stress via activation of ERK1/2 and Akt pathways; phosphorylated ERK1/2 and Akt were decreased by stress and rescued by recombinant GPNMB treatment in NSC34 motor neuron cells; GPNMB aggregates co-localize with TDP-43 aggregates in MAP-2-positive neurons in ALS spinal cord. |
Mutant TDP-43 plasmid transfection, recombinant GPNMB treatment, Western blotting for p-ERK1/2/p-Akt, immunohistochemistry co-localization in ALS patient tissue |
Journal of neuroscience research |
Medium |
27935101
|
| 2016 |
GPNMB silencing via siRNA inhibits proliferation and metastasis of osteosarcoma cells (MG63, U2OS) by suppressing PI3K/Akt/mTOR signaling; IGF-1 (PI3K/AKT activator) reversed the suppressive effects, placing GPNMB upstream of PI3K/Akt/mTOR. |
siRNA knockdown, IGF-1 rescue, MTT proliferation and Transwell invasion assays, Western blotting for PI3K/Akt/mTOR pathway |
Oncology reports |
Medium |
29620278
|
| 2016 |
BRAF and MEK inhibitor treatment of melanoma cells induces GPNMB expression via MITF in a MITF-dependent manner (siRNA knockdown of MITF blocked treatment-induced GPNMB upregulation); GPNMB is expressed at the cell surface in MAPK inhibitor-treated cells and elevated in on-treatment biopsies from patients; combining MAPK inhibitors with CDX-011 (anti-GPNMB ADC) is more effective than MAPK inhibition alone in preclinical models. |
siRNA knockdown of MITF, RT-qPCR, immunoblot, FACS, serial patient biopsies, in vivo tumor models |
Clinical cancer research |
High |
27515299
|
| 2017 |
GPNMB expression in dendritic cells is regulated by a Takayasu arteritis risk locus (rs2069837) in IL6 through long-range chromatin looping (~520 kb); the risk allele preferentially recruits MEF2-HDAC repressive complex, suppressing GPNMB expression in monocyte-derived macrophages; HDAC inhibition reversed this suppression. |
EMSA, DNA affinity precipitation + mass spectrometry, luciferase reporter assay, chromosome conformation capture (3C), HDAC inhibitor treatment in primary macrophages |
Annals of the rheumatic diseases |
High |
31315839
|
| 2017 |
GPNMB induces BiP expression during ER stress by promoting splicing of BiP pre-mRNA; under ER stress, GPNMB relocates to the nucleus and specifically upregulates BiP mRNA through pre-mRNA splicing, acting independently of the three major ER stress transducers (IRE1, PERK, ATF6); GPNMB transgenic mice showed elevated BiP and reduced infarction after MCAO. |
Thapsigargin-induced ER stress, subcellular fractionation/nuclear localization imaging, mRNA splicing analysis, IRE1/PERK/ATF6 pathway inhibition, GPNMB transgenic mouse MCAO model |
Scientific reports |
Medium |
28939899
|
| 2017 |
Gpnmb promotes M2 macrophage polarization: siRNA knockdown of Gpnmb in bone marrow-derived macrophages inhibited M2 polarization and anti-inflammatory cytokines IL-10 and TGF-β, while promoting M1 polarization and pro-inflammatory cytokines IL-1β and TNF-α; IL-4-STAT6 pathway was identified as mechanistically involved in Gpnmb-promoted M2 polarization. |
siRNA knockdown, macrophage polarization assays, cytokine ELISA, STAT6 pathway analysis |
Cellular immunology |
Medium |
28433199
|
| 2018 |
GPNMB exerts anti-inflammatory effects on astrocytes via CD44: recombinant GPNMB attenuated cytokine-induced iNOS, NO, ROS, and IL-6 in astrocytes; using primary mouse astrocytes from CD44 knockout mice, the anti-inflammatory effects of GPNMB were abolished, demonstrating CD44-mediated signaling. |
CD44 knockout primary astrocytes, recombinant GPNMB treatment, qPCR, NO and ROS measurement, immunofluorescence |
Journal of neuroinflammation |
High |
29519253
|
| 2018 |
GPNMB loss-of-function (truncating alleles) causes autosomal-recessive amyloidosis cutis dyschromica in humans; GPNMB is expressed in all epidermal cells with highest staining in melanocytes, and loss of GPNMB is associated with increased amyloid deposits in the dermis, infiltrating macrophages, and loss of melanocytes, implicating GPNMB in melanosome formation, autophagy, and phagocytosis in skin. |
Human genetics (6 nonsense/frameshift mutations in 9 individuals), immunofluorescence of skin biopsies, histopathology |
American journal of human genetics |
High |
29336782
|
| 2018 |
Cell surface GPNMB on dormant breast cancer cells induces stem cell-like properties; wild-type GPNMB, but not a mutant lacking tumorigenic activity (YF mutant in hemITAM of cytoplasmic tail), induced CSC-like properties in breast epithelial cells and 3D sphere formation, demonstrating that the hemITAM tyrosine in the intracellular domain is required for GPNMB's tumorigenic function. |
3D sphere culture, cell surface protein isolation/flow cytometry, wild-type vs. YF-mutant GPNMB overexpression, sphere-forming frequency assay |
Cancer research |
Medium |
30224376
|
| 2019 |
GPNMB is a direct transcriptional target of TFE3 fusion oncoproteins in translocation renal cell carcinoma; GPNMB was upregulated in a PRCC-TFE3 transgenic mouse kidney tumor model and confirmed as a direct TFE3 transcriptional target; GPNMB was also upregulated following TSC2 loss in a MiT/TFE- and mTORC1-dependent fashion in renal cell lines. |
PRCC-TFE3 transgenic mouse model, CRISPR-Cas9 TSC2/TFE3/TFEB knockout cell lines, IHC, transcriptional target validation |
Molecular cancer research : MCR |
High |
31043488
|
| 2019 |
Hepatic Gpnmb is transcriptionally upregulated when the sterol regulatory element-binding protein (SREBP) pathway is inhibited in the liver; Gpnmb is processed to a secreted form that acts as a liver-WAT cross-talk factor, stimulating lipogenesis in white adipose tissue; Gpnmb inhibition (neutralizing antibody or liver-specific knockdown) improved metabolic parameters and promoted WAT beiging. |
Liver-specific Gpnmb knockdown, neutralizing antibody, secreted form identification, metabolic phenotyping in diet-induced obesity model |
Nature metabolism |
High |
32694855
|
| 2019 |
The kringle-like domain (KLD) in the extracellular domain of GPNMB is essential for its tumorigenic potential: a GPNMB(ΔKLD) deletion mutant lacked sphere and tumor formation activity and lost cell migration-promoting activity, despite retaining normal subcellular localization, Src-induced tyrosine phosphorylation, and homo-oligomerization. |
Domain deletion mutagenesis, 3D sphere/tumor formation assay, migration assay, subcellular localization, Western blotting |
Cancer science |
Medium |
31127873
|
| 2019 |
Host GPNMB interacts with porcine circovirus type 2 (PCV2) ORF5 protein (demonstrated by GST pull-down, Co-IP, and confocal microscopy) and restricts PCV2 replication; GPNMB overexpression increased Cyclin A expression and reduced S phase, while knockdown had opposite effects, suggesting GPNMB modulates cell cycle to restrict viral replication. |
GST pull-down, Co-IP, confocal microscopy, lentiviral overexpression/knockdown, viral replication assays, cell cycle analysis |
Frontiers in microbiology |
Medium |
30671053
|
| 2020 |
Macrophage-derived soluble GPNMB activates tumor cells through the CD44 receptor to express cytokine IL-33 and its receptor IL-1RL1, triggering cancer stem cell sphere formation; recombinant IL-33 alone was sufficient to induce tumor spheroid formation with CSC features, establishing GPNMB→CD44→IL-33/IL-1RL1 paracrine axis. |
Gpnmb-mutant DBA/2J mouse tumor models, CD44 receptor blocking/use, recombinant IL-33 treatment, sphere formation assays |
Cellular & molecular immunology |
High |
32728200
|
| 2021 |
N-glycosylated GPNMB (specifically at Asn134) binds to the C-terminus of mutated EGFR and activates EGFR independently of its ligand, promoting phosphorylation at Y845 and activating downstream STAT3 signaling; mutation of N134 glycosylation abolished GPNMB-EGFR binding and inhibited downstream signaling and cancer metastasis in NSCLC. |
Membrane proteomics, Co-IP (GPNMB-EGFR binding), N134 glycosylation site mutagenesis, phosphorylation assays, metastasis models |
Cancer science |
High |
33706413
|
| 2021 |
GPNMB overexpression in an APP/PS1 Alzheimer's disease mouse model enhanced autophagy and reduced Aβ deposition via suppression of the mTOR signaling pathway; treatment with 3-MA (autophagy inhibitor) abolished the beneficial effect of GPNMB on Aβ clearance, placing GPNMB-mediated autophagy as the mechanistic route for Aβ clearance. |
Transgenic GPNMB overexpression in APP/PS1 mice, transmission electron microscopy for autophagy, immunofluorescence, Western blotting for mTOR/Beclin-1, pharmacological autophagy inhibition with 3-MA |
Neuroscience letters |
Medium |
34695452
|
| 2021 |
Gpnmb is a causal modifier of macrophage lysosome function: Gpnmb siRNA knockdown in AKR/J macrophages decreased lysosome function; CRISPR/Cas9 deletion of Gpnmb in RAW 264.7 macrophages similarly impaired lysosome function; the DBA/2J-Gpnmb+/SjJ substrain (with wild-type Gpnmb) showed recovered lysosome function compared to Gpnmb-nonsense DBA/2J, establishing Gpnmb as the causal gene at the Mlfm1 QTL. |
QTL mapping in AKR/J×DBA/2J intercross, siRNA knockdown, CRISPR/Cas9 knockout, lysosome function assay, congenic substrain comparison |
Scientific reports |
High |
33986446
|
| 2021 |
Extracellular vesicles from GPNMB-overexpressing BMSCs activate Wnt/β-catenin signaling to stimulate osteogenic differentiation of BMSCs; DKK1 (Wnt/β-catenin inhibitor) blocked GPNMB-EV-induced osteogenesis, establishing Wnt/β-catenin as the downstream pathway. |
EV isolation from GPNMB-modified BMSCs, DKK1 inhibition of Wnt/β-catenin pathway, osteogenic differentiation assays, OVX rat model |
Life sciences |
Medium |
33582177
|
| 2022 |
GPNMB directly coimmunoprecipitates and co-localizes with α-synuclein (aSyn) in cells; in iPSC-derived neurons, loss of GPNMB resulted in loss of ability to internalize aSyn fibrils and develop aSyn pathology, linking GPNMB to aSyn fibril internalization as a mechanistic route to Parkinson's disease pathology. |
Co-immunoprecipitation, co-localization imaging, iPSC-derived neuron loss-of-function, aSyn fibril internalization assay |
Science |
High |
35981040
|
| 2022 |
Macrophage-derived GPNMB activates aortic adventitial fibroblasts (AAFs) to produce extracellular matrix (ECM) via integrin αVβ1 receptor and downstream Akt and Erk signaling; Co-IP assay demonstrated GPNMB-integrin αVβ1 interaction, and siRNA or integrin inhibitor intervention confirmed this receptor mediates GPNMB's fibrotic effects on AAFs. |
Co-IP, siRNA knockdown, integrin inhibitor, Western blotting for Akt/Erk, in vitro AAF activation assays, GPNMB overexpression in macrophages |
Translational research : the journal of laboratory and clinical medicine |
Medium |
36566014
|
| 2023 |
Macrophage-derived GPNMB trapped by fibrotic ECM activates resident fibroblasts; the CD44/Serpinb2 pathway is activated in fibroblasts by GPNMB, promoting pulmonary fibrosis progression; GPNMB-neutralizing antibodies or macrophage deletion alleviated fibroblast activation in fibrotic ECM from silica-instilled mice. |
Fibrotic ECM fractionation/proteomics, GPNMB-neutralizing antibody, macrophage depletion, gene expression analysis (Serpinb2, CD44) in fibroblasts, silica-instilled mouse model |
Communications biology |
Medium |
36732560
|
| 2023 |
CCN3 activates Wnt signaling (ligand-dependent or -independent) in TNBC, which increases MITF protein, which in turn transcriptionally induces GPNMB expression; GPNMB then activates the EGFR/MAPK pathway; CCN3 knockdown reduced GPNMB expression and EGFR activity, and GPNMB overexpression rescued the anti-cancer effects of CCN3 knockdown, establishing the CCN3→Wnt→MITF→GPNMB→EGFR/MAPK axis. |
siRNA knockdown, overexpression rescue, transcriptome profiling, Western blotting for pathway components, TCGA dataset validation |
Cell death & disease |
Medium |
36737605
|
| 2023 |
GPNMB ameliorates neuroinflammation after subarachnoid hemorrhage via the AMPK/NFκB signaling pathway: recombinant GPNMB increased p-AMPK and suppressed p-NFκB and pro-inflammatory cytokines (IL-1β, IL-6, TNF-α); AMPK inhibitor (dorsomorphin) reversed the effects of rGPNMB on p-AMPK and p-NFκB, establishing AMPK as the downstream mediator. |
SAH mouse model, intracerebroventricular rGPNMB injection, AMPK inhibitor epistasis, Western blotting, ELISA, BBB integrity and behavior assays |
Journal of neuroimmune pharmacology |
Medium |
37919457
|
| 2024 |
Bone-marrow-derived macrophages are the primary source of GPNMB in injured hearts after myocardial infarction (established by lineage tracing and bone-marrow transplantation); GPNMB deficiency increases mortality and cardiac rupture while viral delivery of circulating GPNMB improves heart function; GPR39 was identified as a receptor for circulating GPNMB, and GPR39 absence negated the beneficial effects of GPNMB on cardiac repair. |
Lineage tracing, bone-marrow transplantation, genetic loss-of-function (GPNMB KO), viral GPNMB delivery, single-cell transcriptomics, GPR39 knockout mice |
Nature cardiovascular research |
High |
39455836
|
| 2025 |
GPNMB functions in microglial phagocytosis by wrapping engulfed pathogenic particles and presenting them to lysosomes through direct interaction with lysosomal vacuolar-type proton ATPase catalytic subunit A (ATP6V1A); genetic ablation of GPNMB impaired both phagocytic engulfment and degradation; activating ATP6V1A rescued GPNMB-deficiency-caused phagocytosis impairment. |
GPNMB genetic ablation, Co-immunoprecipitation (GPNMB-ATP6V1A interaction), phagocytosis assays (multiple substrates), ATP6V1A activation rescue, in vivo seizure/epilepsy model |
Cell reports |
High |
39992792
|