| 1992 |
ICAM-3 (ICAM-R/CD50) is a member of the immunoglobulin superfamily with five extracellular Ig-like domains that binds LFA-1 (CD11a/CD18), functioning as a third ligand for LFA-1; it is constitutively expressed on all resting leukocytes but not on resting or cytokine-activated endothelial cells. |
Expression cloning of cDNA, cell adhesion assays, antibody blocking experiments |
Nature |
High |
1448173 1448174
|
| 1992 |
ICAM-3 (CDw50) becomes phosphorylated on serine residues upon stimulation with protein kinase C activators (phorbol esters, mezerein) and by lymphocyte activation agents (ConA, PHA, anti-CD3 cross-linking); this phosphorylation is rapid, dose-dependent, and inhibited by PKC inhibitors staurosporine and H-7, but does not alter surface expression levels. |
Radiolabeling with 32P-orthophosphate, phosphoamino acid analysis, PKC inhibitor assays, flow cytometry |
European journal of biochemistry |
Medium |
1730238
|
| 1993 |
ICAM-3 regulates the LFA-1/ICAM-1 adhesion pathway: engagement of ICAM-3 by activating anti-ICAM-3 mAb (HP2/19, epitope A) triggers LFA-1/ICAM-1-dependent T lymphoblast homotypic aggregation, increases T cell attachment to ICAM-1, and co-stimulates T lymphocyte proliferation with anti-CD3. ICAM-3 localizes to cellular uropods during aggregation, distinct from LFA-1 and ICAM-1 at intercellular boundaries. |
T cell adhesion assays on purified ICAM-3 surfaces, mAb blocking with anti-LFA-1 and anti-ICAM-1, immunofluorescence microscopy, proliferation assays |
The Journal of cell biology |
High |
7901223
|
| 1993 |
CDw50 and ICAM-3 are the same glycoprotein (120 kDa surface molecule); identity established by immunochemical, functional, and protein sequencing studies. |
Protein sequencing, immunochemical cross-reactivity, functional adhesion assays |
European journal of immunology |
High |
8325327
|
| 1994 |
The LFA-1 binding site on ICAM-3 resides in Ig-like domain 1, which is necessary and sufficient for LFA-1 binding; domain deletion and chimera analysis identified five residues (Asn23, Ser25, Glu37, Phe54, Gln75) that contribute to the binding site, predicted to cluster on the BED face and C/E strands of domain 1 by molecular modeling. |
Domain deletion mutants, ICAM-3/CD21 chimeras, site-directed mutagenesis (45 point mutants), LFA-1 adhesion assays, epitope mapping with 17 mAbs |
The Journal of biological chemistry |
High |
8798624
|
| 1994 |
ICAM-3 engagement activates ICAM-3-independent (LFA-1/ICAM-1-independent) cell aggregation in JM T cells and HAFSA B cells; this aggregation involves tyrosine phosphorylation and is regulated by the CD45 tyrosine phosphatase — anti-CD45 mAbs and tyrosine kinase inhibitors abolish ICAM-3-induced aggregation. Tyrosine-phosphorylated proteins (125, 70, 38 kDa) accumulate at intercellular boundaries upon ICAM-3 or LFA-1 engagement. |
mAb blocking assays, tyrosine kinase inhibitors (herbimycin A), CD45 inhibitors, immunofluorescence, Western blot of phosphotyrosine |
The Journal of cell biology |
High |
7520448
|
| 1994 |
ICAM-3 engagement by activating mAb (HP2/19) enhances T lymphoblast adhesion to ICAM-1, VCAM-1, fibronectin fragments (FN40, FN80) via increased LFA-1 and VLA-4/VLA-5 avidity, and induces a dramatic uropod-like morphological change with exclusive redistribution of ICAM-3 to the distal uropod tip, while LFA-1 and VLA-β1 remain distributed over the contact area. |
Cell adhesion assays, mAb blocking, immunofluorescence microscopy, phorbol ester controls |
The Journal of cell biology |
High |
7525599
|
| 1994 |
Purified ICAM-3 supports LFA-1-dependent T cell adhesion in a temperature- and cation-dependent manner. Combined mAbs to ICAM-1, ICAM-2, and ICAM-3 achieve near-complete inhibition of LFA-1-dependent lymphocyte proliferative responses (PHA, allogeneic cells, specific antigen), suggesting these three molecules account for most or all functional LFA-1 ligands. ICAM-3 also provides a co-stimulatory signal for resting T lymphocyte proliferation. |
Adhesion assays on purified ICAM-3, mAb blocking of PBL proliferation (PHA, MLR, antigen), T cell co-stimulation assays |
The Journal of experimental medicine |
High |
7905020
|
| 1994 |
ICAM-3 is a ligand for αdβ2 (CD11d/CD18), a novel fourth β2 integrin that shows preferential binding to ICAM-3 over ICAM-1. |
cDNA cloning of αd chain, transfection, cell adhesion assays comparing ICAM-3 vs ICAM-1 binding |
Immunity |
High |
8777714
|
| 1994 |
Cross-linking CD50 (ICAM-3) on Jurkat T cells induces calcium mobilization (primarily via extracellular Ca2+ influx) and tyrosine phosphorylation; p56lck and p59fyn protein tyrosine kinases are found in CD50 immunoprecipitates, implicating these Src-family kinases in CD50 signal transduction. |
Anti-CD50 cross-linking, intracellular Ca2+ measurement, phosphotyrosine immunoprecipitation, in vitro kinase assays, specific antisera co-immunoprecipitation |
The Journal of experimental medicine |
High |
7515097
|
| 1994 |
Signaling through CD50 (ICAM-3) increases T lymphocyte adhesion to TNF-stimulated endothelial cells and extracellular matrix proteins by increasing β1 and β2 integrin avidity, without altering surface integrin expression levels. |
Anti-CD50 mAb stimulation, adhesion to HUVEC and ECM proteins, mAb blocking of β1 and β2 integrins, ICAM-1 transfectant binding, flow cytometry for integrin surface expression |
European journal of immunology |
Medium |
7515813
|
| 1994 |
The I domain of LFA-1's α subunit contains the binding site for both ICAM-1 and ICAM-3; two I domain mAbs (YTH81.5 and 122.2A5) selectively block ICAM-3 but not ICAM-1 binding, and one I domain mAb (MEM-83) activates binding to ICAM-1 but not ICAM-3, demonstrating that LFA-1 can selectively engage these two highly homologous ligands through the I domain. |
T cell binding assays to ICAM-1 or ICAM-3-coated plastic, LFA-1 transfected COS cell adhesion assays, mAb epitope mapping to I domain |
The Journal of cell biology |
High |
7518468
|
| 1994 |
ICAM-3 is a co-stimulatory molecule for both resting and activated T lymphocytes: soluble ICAM-3 or anti-ICAM-3 mAbs co-immobilized with sub-optimal anti-CD3 stimulate CD25 and CD69 expression; this activation is blocked by anti-CD18 mAb, implicating LFA-1 (via its β2 chain) as the mediating integrin. Anti-ICAM-3 (but not anti-ICAM-1) co-stimulates resting cord blood T cells. |
Co-stimulation assays with immobilized ICAM-3 and anti-CD3, flow cytometry for activation markers (CD25, CD69), mAb blocking with anti-CD18 |
European journal of immunology |
Medium |
8223855
|
| 1994 |
The LFA-1 binding site in ICAM-3 is in the amino-terminal (domain 1) IgSF domain; electron microscopy shows ICAM-3 is a 15 nm straight rod with head-to-tail domain arrangement; residues E37/T38 form a conserved integrin binding site motif also found in ICAM-1 and VCAM-1, while Q75 may confer LFA-1 binding specificity. |
Electron microscopy, domain deletion mutants, site-directed mutagenesis, mAb blocking adhesion assays |
Cell adhesion and communication |
High |
7531103
|
| 1994 |
ICAM-3 surface expression on activated neutrophils is rapidly downregulated by a proteolytic shedding mechanism (not internalization): protease inhibitors block PMA-induced downregulation, and ICAM-3 is detected in cell-free supernatants and in plasma (0-296 ng/ml). The remaining ICAM-3 on the neutrophil surface still supports anti-ICAM-3-triggered homotypic aggregation. |
Immunofluorescence flow cytometry, 125I-labeled mAb internalization assay, immunoprecipitation of supernatants, radioimmunoassay of plasma, protease inhibitor studies |
European journal of immunology |
High |
7525295
|
| 1994 |
ICAM-3 is not a ligand for Mac-1 (CD11b/CD18) or p150,95 (CD11c/CD18): purified ICAM-3 from lymphoid cells and neutrophils does not support adhesion of Mac-1- or p150,95-expressing CHO transfectants, and purified Mac-1 does not support adhesion of ICAM-3-expressing L cell transfectants, despite ICAM-3 being well expressed on neutrophils where Mac-1 is abundant. |
Cell adhesion assays with CHO and L cell transfectants expressing specific integrins, homotypic aggregation assays |
European journal of immunology |
High |
7737271
|
| 1995 |
CD50 (ICAM-3) is phosphorylated on tyrosine in human neutrophils (predominantly phosphotyrosine by phosphoamino acid analysis); phosphorylation increases transiently (peak ~1 min) after stimulation with FMLP, PAF, PMA, or calcium ionophore. Tyrosine kinase activity is detected in CD50 immunoprecipitates from solubilized neutrophils. |
Radiolabeling ecto-kinase assay, phosphoamino acid analysis, immunoprecipitation in vitro kinase assay |
Journal of immunology |
Medium |
7876557
|
| 1995 |
A circulating/soluble form of ICAM-3 (sCD50) is produced by lymphocytes upon activation (particularly CD3 triggering), is proteolytically cleaved from the cell membrane (apparent MW ~95 kDa vs membrane ~120 kDa by immunoblot), and is detectable in normal human serum; sCD50 levels are elevated in SLE patients and correlate positively with sCD27 levels. |
Sandwich ELISA, immunoblot of culture supernatants, Northern blot kinetics, flow cytometry for surface expression |
Journal of immunology |
Medium |
7876564
|
| 1996 |
Stimulation through CD50 (ICAM-3) on human thymocytes by mAb cross-linking induces calcium mobilization and CD69 (but not CD25) expression; co-cross-linking with CD45 inhibits calcium mobilization, implicating tyrosine phosphorylation in CD50 signaling. CD50 cross-linking also increases activation-induced cell death of thymocytes. |
mAb cross-linking, intracellular Ca2+ measurement, co-cross-linking with anti-CD45, flow cytometry for activation markers, apoptosis assays |
Tissue antigens |
Medium |
9008304
|
| 1997 |
The LFA-1 I domain alone (expressed as GPI-anchored) is sufficient to mediate transient, Mg2+-dependent rolling adhesion on ICAM-1 and ICAM-3 in hydrodynamic flow. MEM-83 (activating I domain mAb) decreased rolling velocity on ICAM-1 but blocked rolling on ICAM-3, demonstrating that ICAM-3 interaction with the I domain is blocked by this conformational change. |
Stable GPI-anchored I domain expression, flow cell rolling assays on lipid bilayers with purified ICAM-1 or ICAM-3, activating mAb (MEM-83) treatment, divalent cation substitution |
The Journal of experimental medicine |
High |
9271587
|
| 1998 |
The LFA-1 binding site on ICAM-3 domain 1 is more extensive than that of ICAM-1, involving residues on both the ABED face and GFC face; point mutagenesis of 18 residues identified 7 that reduce or abolish LFA-1 adhesion, including 3 on the A strand of the ABED face — a surface not used by ICAM-1 for LFA-1 binding. |
18-point mutagenesis of domain 1, LFA-1 adhesion assays, functional blocking mAb binding studies |
Journal of immunology |
High |
9686599
|
| 1998 |
ICAM-3 engagement on monocytes and neutrophils by domain 1-directed triggering mAbs induces outside-in signaling: monocytes secrete chemokines MIP-1α, IL-8, and MCP-1; neutrophils secrete IL-8; monocytes show dramatic spreading via Fab/F(ab')2 fragments (excluding Fc-mediated effects). Co-engagement of ICAM-3 and Fc receptors (FcγRI or FcγRII) is required for maximal chemokine secretion by monocytes. |
Immobilized mAb engagement, ELISA for chemokines, Fab/F(ab')2 fragment controls, microscopy of cell spreading |
Journal of immunology |
High |
9605163
|
| 1998 |
ICAM-3 engagement on PMN (by CAL3.10 mAb binding in the αLβ2 integrin-binding region) activates PMN homotypic aggregation and adhesion via outside-in signaling: β2 integrin-dependent mechanism, activates tyrosine and PKC kinases, and reorganizes the cytoskeleton without causing degranulation or increasing surface β2 integrin expression. A different anti-ICAM-3 mAb (HP2/19) does not activate PMN, demonstrating epitope-specificity. |
PMN aggregation assays, F(ab')2 fragment controls, anti-β2 integrin blocking, kinase activity assays, cytoskeleton reorganization assays, degranulation assays (elastase release), flow cytometry for β2 integrin expression |
Journal of immunology |
High |
9834117
|
| 1999 |
ICAM-3 on the surface of apoptotic leukocytes acquires altered receptor-binding activity: during apoptosis, the first Ig-like domain of ICAM-3 participates in macrophage recognition and phagocytosis of apoptotic cells. ICAM-3 on apoptotic cells switches binding preference from LFA-1 to an alternative macrophage receptor; mAb blockade of macrophage CD14 (but not αvβ3 or αdβ2) inhibited ICAM-3-dependent recognition of apoptotic cells. |
mAb blocking of macrophage-apoptotic cell interactions, ICAM-3 transfection into non-leukocytes, multiple apoptosis stimuli, domain 1-specific mAb characterization |
Journal of immunology |
High |
10352301
|
| 2000 |
DC-SIGN, a novel dendritic cell-specific C-type lectin, binds ICAM-3 expressed on resting T cells with high affinity and mediates transient DC-T cell adhesion required for initiation of primary immune responses; antibodies against DC-SIGN inhibit DC-induced proliferation of resting T cells. |
Identification of DC-SIGN by expression, binding assays, anti-DC-SIGN mAb inhibition of DC-T cell adhesion and T cell proliferation |
Cell |
High |
10721994
|
| 2000 |
LFA-1 binding to ICAM-3 (vs ICAM-1 or ICAM-2) produces distinct cytokine profiles in T cells: ICAM-2 and ICAM-3 co-stimulation induces stronger TNF-α secretion, whereas ICAM-1 co-stimulation induces higher IL-10 production, demonstrating that the specific ICAM ligand engaged by LFA-1 differentially shapes the Th1/Th2 cytokine output. |
T cell co-stimulation assays on immobilized ICAM-1, -2, or -3, cytokine ELISA (GM-CSF, IFN-γ, IL-2, IL-4, IL-5, IL-10, TNF-α), proliferation assays |
European journal of immunology |
Medium |
10427988
|
| 2000 |
LFA-1 binds ICAM-3 as its primary ligand supporting neutrophil homotypic adhesion at high shear rates (≥800 s-1), while Mac-1 predominates at low shear rates (~100 s-1); ICAM-3 supports LFA-1-mediated homotypic neutrophil aggregation with efficiency varying with shear rate and time post-stimulation. |
Cone-plate viscometer shear assay, flow cytometry aggregate quantification, mAb blocking of LFA-1, Mac-1, and ICAM-3, collision efficiency modeling |
Journal of immunology |
Medium |
10725740
|
| 2001 |
ICAM-3 N-linked oligosaccharides are predominantly tri- and tetra-antennary complex-type (~6 mol/mol protein) with poly-N-acetyllactosamine chains; a small amount of high-mannose oligosaccharide (6 α-mannose residues) is present, which can serve as a ligand for DC-SIGN. |
Hydrazinolysis, paper electrophoresis, lectin column chromatography, sequential glycosidase digestion, methylation analysis, structural characterization |
European journal of biochemistry |
High |
11179968
|
| 2002 |
ICAM-3 is specifically clustered at the region of the T lymphocyte surface that initiates contact with APCs before antigen recognition (as shown by time-lapse live imaging), and plays a role in T cell-APC conjugate formation, early intracellular signaling, and cytoskeletal rearrangement in the initial APC-scanning phase. |
Time-lapse live-cell imaging, antibody blocking of T cell-APC conjugate formation, early signaling assays, cytoskeletal rearrangement assays |
Nature immunology |
High |
11812993
|
| 2004 |
DC-SIGN binds to gp120 in a distinct but overlapping manner compared to ICAM-2 and ICAM-3: recombinant soluble DC-SIGN binds gp120 >100-fold and >50-fold better than ICAM-2-Fc and ICAM-3-Fc, respectively; Asp-367 mutation enhances gp120 binding but diminishes ICAM-2 and ICAM-3 binding, while Gly-346 mutation abrogates gp120 binding but enhances ICAM-2/ICAM-3 binding. |
Recombinant protein binding assays (ICAM-2-Fc, ICAM-3-Fc, gp120-Fc), alanine-scanning mutagenesis of DC-SIGN, monosaccharide/disaccharide competition, glycan chip analysis |
The Journal of biological chemistry |
High |
14970226
|
| 2006 |
DC-SIGN binds native ICAM-3 isolated from peripheral leukocytes via Lewis x (Lex) carbohydrate residues; ICAM-3 from granulocytes (not lymphocytes) bears Lex residues mediating DC-SIGN binding; FUT IX is the primary fucosyltransferase mediating Lex synthesis on ICAM-3 in myeloid cells, with minor contribution from FUT IV. |
DC-SIGN binding assays with native ICAM-3, Lewis x mAb staining, MALDI-TOF mass spectrometry for Lex confirmation, cotransfection of FUT isoforms (FUT III, IV, VII, IX) with ICAM-3, flow cytometry |
Glycobiology |
High |
17145745
|
| 2011 |
Apoptotic cell-derived microparticles bearing ICAM-3 potently attract macrophages (chemoattraction) to sites of leukocyte cell death; ICAM-3 on apoptotic cells mediates domain 1-2-dependent tethering to phagocytes. Apoptosis causes reduction in cell-surface ICAM-3 via release within microparticles. Blocking mAb (MA4) that inhibits domain 1-2 of ICAM-3 blocks apoptotic cell clearance. |
Novel anti-ICAM-3 mAb blocking studies, ICAM-3-deficient apoptotic leukocytes, macrophage chemotaxis assays, microparticle isolation and characterization, phagocytosis assays |
Cell death and differentiation |
High |
22117198
|
| 2012 |
ICAM-3 gene promoter activity is leukocyte-restricted and is negatively regulated by RUNX transcription factors: RUNX cognate sequences are required for promoter activity and RUNX3/Ets/C-EBP cooperative regulation; siRNA-mediated reduction of RUNX3 increases ICAM-3 mRNA levels. ICAM-3 protein levels decrease during monocyte-to-macrophage differentiation and monocyte transendothelial migration, correlating with RUNX3 increase. |
ICAM-3 promoter-reporter assays, chromatin immunoprecipitation (in vivo occupancy), RUNX-binding site mutagenesis, siRNA knockdown of RUNX3, protein analysis during differentiation/migration |
PloS one |
High |
22479382
|
| 2013 |
ICAM-3 expressed on macrophages functions as a recognition receptor for apoptotic neutrophils: siRNA silencing and antibody blockade of ICAM-3 on macrophages (but not neutrophils) reduces phagocytosis; blocking ICAM-3 on apoptotic neutrophil surface also reduces uptake. ICAM-3 and LFA-1 (αL/β2) co-localize at phagocytic portals on macrophages; simultaneous knockdown causes marked phagocytosis deficiency. |
Gene silencing (siRNA), blocking antibodies, confocal microscopy of phagocytic portals, apoptotic neutrophil phagocytosis assay |
Apoptosis |
High |
23775590
|
| 2010 |
ICAM-3 overexpression in NSCLC cells increases cell migration and invasion by upregulating MMP-2 and MMP-9 expression and activity through a signaling pathway: ICAM-3 → Akt phosphorylation → CREB activation → MMP upregulation. Blocking the Akt pathway attenuates CREB activation and reduces MMP activity and migration/invasion, regardless of p53 or PTEN status. |
Stable ICAM-3-overexpressing transfectants, migration/invasion assays, MMP-2/9 activity assays, Akt phosphorylation Western blot, CREB activation assays, Akt pathway inhibitors, CREB siRNA |
International journal of oncology |
Medium |
19956847
|
| 2018 |
ICAM-3 promotes cancer cell stemness by recruiting and binding Src kinase via a YLPL motif in its intracellular domain, thereby activating PI3K-AKT signaling that enhances SOX2 and OCT4 activity; activated p-AKT also facilitates p50 nuclear translocation enhancing ICAM-3 promoter activity creating a positive feedback loop. ICAM-3 knockdown reduces side population, sphere formation, chemo-resistance, and tumor growth in vivo. |
siRNA screen, shRNA knockdown, Src co-immunoprecipitation with intracellular domain, Src/PI3K inhibitors, in vivo tumor xenograft, ALDH assay, sphere formation, p50 nuclear translocation assay, ICAM-3 promoter ChIP |
Cancer letters |
Medium |
29477378
|
| 2018 |
ICAM-3 promotes tumor metastasis through a LFA-1-ICAM-3-ERM-lamellipodia mechanism: ICAM-3 binds LFA-1 via its extracellular domain and ERM proteins via its intracellular domain, creating mechanical tension that facilitates cell separation (metastasis). ICAM-3 extracellular or intracellular domain mutants abolish ICAM-3-mediated metastasis in vitro and in vivo; blocking LFA-1/ICAM-3 interaction with LFA-1 antibody or Lifitegrast reduces metastasis. |
Co-IP of LFA-1 and ERM with ICAM-3, extracellular/intracellular domain mutants, in vitro and in vivo metastasis assays, LFA-1 blocking antibody and Lifitegrast treatment |
Biochimica et biophysica acta. Molecular basis of disease |
Medium |
29729315
|
| 2011 |
Kidins220/ARMS (a neuronal scaffold protein also expressed in T cells) co-localizes with and co-immunoprecipitates with ICAM-3 at the uropod of polarized T cells; this association requires cell polarity and is regulated by PKC. Kidins220/ARMS knockdown promotes basal and SDF-1α-induced T cell directed migration. |
Co-immunoprecipitation, confocal immunofluorescence colocalization, cell polarity disruption, PKC inhibition, siRNA knockdown, chemotaxis assays |
European journal of immunology |
Medium |
21381019
|
| 2004 |
Activation of ICAM-3 on human bone marrow endothelial cells by antibody cross-linking reduces electrical resistance of endothelial monolayers and causes loss of cell-cell contacts; cross-linking induces association of moesin (and later ezrin) with ICAM-3, and stimulates production of reactive oxygen species (ROS) that mediate control of endothelial integrity. |
Electrical resistance measurements, immunocytochemistry, biochemical pull-down/co-IP of moesin and ezrin, ROS detection |
Journal of vascular research |
Medium |
14726630
|