| 1990 |
ITGA3 (Gap-B3) was identified as a member of the integrin superfamily by cDNA cloning and amino acid sequencing. The protein consists of two polypeptide chains (Mr=110,000 and 30,000) connected by disulfide bonds, derived from a precursor by proteolytic cleavage, and contains metal-binding sequences, a transmembrane domain near C-terminus, and matched cysteine residue positions characteristic of integrin alpha subunits. |
cDNA cloning, protein purification, partial amino acid sequencing, Southern/Northern hybridization |
The Journal of biological chemistry |
High |
1691184
|
| 2013 |
Exosomal ITGA3 from prostate cancer cells promotes migration and invasion of non-cancerous prostate epithelial cells (prEC); inhibition of exosomal ITGA3 almost completely abolished this effect, establishing a paracrine/exosomal mechanism by which ITGA3 remodels surrounding non-cancerous cells. |
Exosome isolation by ultracentrifugation, transwell migration/invasion assay, LC-MS/MS proteomics, Western blotting, FACS uptake assay, ITGA3 inhibition |
Journal of extracellular vesicles |
Medium |
24371517
|
| 2015 |
ITGA3 and ITGB1 are direct targets of miR-223 in prostate cancer cells; knockdown of ITGA3 and ITGB1 significantly inhibited cancer cell migration and invasion, placing ITGA3 downstream of miR-223 in a signaling axis controlling cell motility. |
miRNA restoration, siRNA knockdown, in silico database analysis, genome-wide gene expression, transwell migration/invasion assays |
Cancer science |
Medium |
26509963
|
| 2017 |
ITGA3 is a direct target of all members of the miR-199 family (miR-199a-5p, miR-199a-3p, miR-199b-5p, miR-199b-3p) in head and neck squamous cell carcinoma; knockdown of ITGA3 significantly inhibited cancer cell migration and invasion. |
Ectopic miRNA expression, in silico database and genome-wide gene expression analyses, siRNA knockdown, transwell migration/invasion assays |
Cancer science |
Medium |
28612520
|
| 2017 |
ITGA3 is a validated target of miR-101 in nasopharyngeal carcinoma; ITGA3 restoration rescued the suppressive effects of miR-101 on migration, invasion, and angiogenesis in vitro and metastasis in vivo using the chicken chorioallantoic membrane model. |
Ectopic miRNA expression, ITGA3 rescue experiment, in vitro migration/invasion assays, in vivo chorioallantoic membrane angiogenesis/metastasis model |
Cell death & disease |
Medium |
28102841
|
| 2017 |
In the developing inner ear, miR-183 directly represses ItgA3; this miR-183/ItgA3 axis controls cell proliferation in the developing cochlea, and loss of Dicer (impairing miRNA biogenesis) leads to failure of cochlear progenitors to exit the cell cycle, a phenotype linked to ItgA3 accumulation. |
Conditional Dicer knockout in otocyst, miRNA target identification, unbiased genomic approach |
Cell death and differentiation |
Medium |
28777373
|
| 2018 |
ITGA3 and ITGB1 are directly regulated by miR-124-3p in pancreatic ductal adenocarcinoma cells (validated by luciferase reporter assay); knockdown of ITGA3/ITGB1 suppressed migration and invasion and inhibited phosphorylation of FAK, AKT, and ERK, placing ITGA3 upstream of these oncogenic signaling pathways. |
Luciferase reporter assay, siRNA knockdown, transwell migration/invasion assays, Western blot for phospho-FAK/AKT/ERK |
Oncotarget |
Medium |
29988949
|
| 2018 |
ITGA3 is a direct target of miR-124 in colorectal cancer (experimentally validated); ITGA3 plays a critical role in regulating anoikis sensitivity of CRC cells, with ITGA3 expression promoting anoikis resistance and facilitating metastasis in vivo. |
In silico analysis, experimental target validation, overexpression/knockdown functional assays, in vivo anoikis/metastasis assays |
Biochemical and biophysical research communications |
Medium |
29758195
|
| 2019 |
miR-124-3p directly targets ITGA3 in bladder cancer (confirmed by luciferase reporter assay); ITGA3 knockdown inhibited tumor cell migration and invasion, and ITGA3 mediates its effects through FAK/PI3K/AKT and FAK/Src signaling pathways and modulation of EMT markers (N- and E-cadherin). |
Luciferase reporter assay, siRNA knockdown, wound healing and transwell assays, Western blot for FAK/PI3K/AKT/Src pathway proteins and EMT markers |
Cancer biomarkers |
Medium |
30614803
|
| 2019 |
miR-524-5p directly targets ITGA3 in papillary thyroid cancer (experimentally validated); downregulation of ITGA3 by miR-524-5p disturbs the autophagy pathway, inhibiting cancer cell viability, migration, invasion, and apoptosis. |
Direct target validation, functional cell viability/migration/invasion assays, pathway analysis |
Journal of cellular physiology |
Medium |
30941771
|
| 2020 |
ITGA3 interacts with VASP in breast cancer cells (confirmed by co-immunoprecipitation and immunofluorescence); ITGA3 regulates VASP expression, and the ITGA3-VASP complex modulates breast cancer cell stemness, EMT, and PI3K-AKT pathway activity. |
Co-immunoprecipitation, immunofluorescence, Western blot, sphere formation assay, transwell and wound healing assays |
Gene |
Medium |
31987909
|
| 2021 |
CD9 and ITGA3 are upregulated in macrophages upon HIV-1 infection; downregulation of these genes decreased HIV-1 replication in macrophages, suggesting ITGA3 supports viral production most likely at the level of viral budding and release. |
Gene expression profiling, siRNA knockdown, viral replication assays in macrophages |
Virology |
Medium |
34242748
|
| 2022 |
Transcription factor YY1 directly binds to the promoter region of ITGA3 and regulates its mRNA and protein expression in trophoblastic cells; both YY1 and ITGA3 accelerate phosphorylation of focal adhesion kinase (FAK) and affect cytoskeleton formation, modulating trophoblast invasion ability. |
ChIP-seq, RNA-seq, ChIP experiment, RT-PCR, dual-luciferase reporter gene assay, gene silencing, Western blot, immunofluorescence |
Journal of reproductive immunology |
Medium |
35970081
|
| 2024 |
Collagen I (Col1) secreted by pancreatic cancer cells acts as a ligand for ITGA3 in an autocrine manner, activating the FAK/PI3K/AKT/mTOR signaling pathway and thereby increasing expression of HIF1α and c-Myc to drive glycolysis; blockade of Col1 by siRNA or ITGA3 by a blocking antibody inactivated this pathway and impaired malignant tumor behaviors. |
Functional assays (growth, metastasis), siRNA knockdown of Col1, blocking antibody against ITGA3, Western blot for FAK/PI3K/AKT/mTOR/HIF1α/c-Myc, glycolysis assays |
Cancer gene therapy |
Medium |
39690180
|
| 2024 |
ITGA3 interacts with the MET receptor tyrosine kinase in papillary thyroid cancer (confirmed by co-immunoprecipitation and immunofluorescence); ITGA3-MET cooperation leads to MET phosphorylation at Tyr1234/1235 and activation of ERK and PI3K/AKT signaling pathways, promoting PTC proliferation and migration in vitro and in vivo. |
Co-immunoprecipitation, immunofluorescence, Western blot for MET phosphorylation and downstream pathway activation, cell functional assays, xenograft models |
Annals of medicine |
Medium |
40138447
|
| 2024 |
Iron accumulation elevates reactive oxygen species (ROS) which downregulates Itga3 expression in hippocampal neural stem cells (NSCs); reduced Itga3 leads to excessive NSC activation, depletion of the NSC pool, diminished neurogenesis, and cognitive dysfunction after intracerebral hemorrhage. Conditional overexpression of Itga3 in NSCs attenuated these defects. |
Mouse ICH model, iron chelation, ROS scavenging, conditional Itga3 overexpression in NSCs, neurogenesis assays, cognitive behavioral tests |
Redox biology |
Medium |
38367510
|
| 2024 |
ITGA3 knockdown in trophoblast cells suppresses ULK1 expression, impairing autophagy initiation and inhibiting trophoblast cell invasion and migration, contributing to recurrent spontaneous abortion pathology; ITGA3 regulates ULK1-mediated autophagy to influence trophoblast function. |
ITGA3 knockdown, RNA sequencing, ULK1 expression assays, autophagy assays, migration/invasion assays, mouse RSA model |
American journal of physiology. Cell physiology |
Medium |
39437445
|
| 2024 |
S100A16 binds to MOV10 (confirmed by co-immunoprecipitation) and positively modulates MOV10 expression in lung adenocarcinoma cells; MOV10 in turn stabilizes ITGA3 mRNA (confirmed by RNA immunoprecipitation and actinomycin D assay), regulating ECM-receptor interactions and promoting malignant progression. |
Co-immunoprecipitation (S100A16-MOV10), RNA immunoprecipitation (MOV10-ITGA3 mRNA), actinomycin D mRNA stability assay, knockdown/overexpression functional assays |
Molecular medicine reports |
Medium |
39450567
|
| 2024 |
ITGA3 regulates AT2 cell self-renewal through the FAK/YAP axis in COPD; cigarette smoke-induced ROS accumulation suppresses ITGA3, leading to impaired FAK/YAP signaling and AT2 progenitor dysfunction; ROS scavenging with NAC restored ITGA3 expression, reactivated FAK/YAP signaling, and ameliorated emphysematous pathology. |
scRNA-seq, chronic CS-exposed murine model, alveolar organoids, ITGA3 genetic manipulation, pharmacological NAC intervention, immunostaining |
Journal of advanced research |
Medium |
41270956
|
| 2024 |
ITGA3 is identified as a driver of early-stage lung adenocarcinoma in a KRAS-mutant AT2 injury/plasticity state; ITGA3 is co-expressed with SRC in AT2KRAS cells, and combined KRASG12D and SRC inhibitors impaired AT2KRAS organoid growth, placing ITGA3 in a KRAS-ITGA3-SRC signaling axis. |
scRNA-seq from organoids, mice, and stage-IA LUAD patients; KRASG12D and SRC inhibitor treatment of AT2 organoids |
The EMBO journal |
Medium |
38755258
|
| 2025 |
NPNT (nephronectin) interacts with ITGA3 and through this interaction inhibits LATS1/MOB1 hyperactivation, facilitates YAP1 nuclear translocation, and suppresses YAP1 ubiquitination and degradation, thereby regulating cellular senescence in alveolar epithelial cells and modulating pulmonary fibrosis. |
NPNT-ITGA3 interaction assays, YAP1 nuclear translocation imaging, ubiquitination assays, LATS1/MOB1 phosphorylation Western blot, NPNT overexpression/knockout mouse models, pharmacological Escin treatment |
Advanced science |
Medium |
40444575
|
| 2025 |
ITGA3 is identified as a proximal interactor of the RPARPAR CendR peptide/NRP-1 receptor system; mass spectrometry of proximity-labeled membrane proteins from NRP-1-positive cells showed ~20-fold enrichment of ITGA3 (along with ITGAV and ITGB1), suggesting ITGA3 is in spatial proximity to the NRP-1 receptor complex at the cell surface. |
Proximity labeling with VHP-HRP conjugates, biotin-tyramide covalent labeling of nearby membrane proteins, affinity purification, mass spectrometry |
bioRxivpreprint |
Low |
|
| 2025 |
Integrin α3β1 (ITGA3/ITGB1) on pancreatic cancer cells is identified as a sialylated glycoprotein ligand for Siglec-10, an inhibitory glyco-immune checkpoint on tumor-associated macrophages; the Siglec-10/α3β1 interaction suppresses macrophage-mediated phagocytosis, and anti-Siglec-10 monoclonal antibodies disrupted this interaction and enhanced anti-tumor immunity in vitro and in mouse models. |
Ligand identification, monoclonal antibody blockade, macrophage phagocytosis assays, T cell proliferation assays, PDAC xenograft and human Siglec-10 transgenic mouse models |
bioRxivpreprint |
Medium |
|
| 2025 |
SOX10 knockdown in melanoma upregulates ITGA3 (via IRF1 as an upstream regulator); ITGA3 is essential for cell adhesion and contributes to melanoma metastasis, acting downstream of SOX10-IRF1 in the SOX10-IRF1-ITGA3/EphA2-FAK pathway; FAK inhibitor defactinib significantly reduced metastasis in vivo. |
siRNA knockdown of SOX10, in silico and in vitro identification of ITGA3/EphA2 as downstream effectors, IRF1 identification as upstream regulator, FAK inhibitor treatment, in vivo metastasis assays |
Cancer science |
Medium |
40808260
|
| 2025 |
Rab3A directly targets and positively regulates ITGA3 expression (confirmed by dual luciferase assay); ITGA3 stabilization by Rab3A mediates protection against H2O2-induced oxidative stress and mitochondrial dysfunction in inner ear HEI-OC1 cells, as silencing ITGA3 reversed the protective effects of Rab3A. |
Dual luciferase assay, CCK-8 viability, flow cytometry apoptosis, immunofluorescence mitochondrial membrane potential, oxidative stress and mitochondrial function assays, siRNA knockdown of ITGA3 |
Journal of bioenergetics and biomembranes |
Medium |
41085878
|
| 2026 |
ITGA3 on PDAC cells acts as a receptor for laminin-332 (LAM332) secreted by cancer-associated fibroblasts (CAFs); CAF-derived LAM332-ITGA3 engagement promotes PDAC cell proliferation, invasion, homotypic CTC clustering, and suppresses apoptosis; neutralization of LAM332 reduced hepatic/pulmonary metastasis and prolonged survival in mouse models. |
Proteomic and transcriptomic analyses, clinical specimen validation, LAM332 neutralization, CTC clustering assays, apoptosis assays, in vivo mouse metastasis models |
Cell death & disease |
Medium |
41881953
|
| 2026 |
H. pylori infection induces p-STAT3 activation, which transcriptionally upregulates ITGA3; elevated ITGA3 then activates the NF-κB/mTOR signaling axis and enhances TGF-β-related signaling, promoting gastric cancer cell proliferation, EMT, and migration. |
H. pylori infection of GC cells, p-STAT3 pathway analysis, ITGA3 expression assays, NF-κB/mTOR and TGF-β pathway Western blots, functional proliferation/migration/EMT assays, in vivo tumor growth |
Molecular and cellular biochemistry |
Medium |
42240927
|