Affinage

CD69

Early activation antigen CD69 · UniProt Q07108

Length
199 aa
Mass
22.6 kDa
Annotated
2026-06-09
100 papers in source corpus 30 papers cited in narrative 30 extracted findings
Cross-family judge vs UniProt: Affinage preferred faithfulness: 7/7 claims corpus-supported (100%)

Mechanistic narrative

Synthesis pass · prose summary of the discoveries below

CD69 is a type II transmembrane C-type lectin glycoprotein, expressed as a phosphorylated disulfide-linked homodimer, that functions as an early activation antigen and cis-acting regulator of lymphocyte migration and effector programs across multiple leukocyte lineages (PMID:8340758, PMID:2388032). Its best-defined molecular role is as a cis protein agonist of the egress receptor S1PR1: CD69 physically complexes with S1PR1 (but not S1PR3) through an integral-membrane interaction in which the CD69 transmembrane helix contacts S1PR1-TM4, allosterically activating the receptor, driving Gi-dependent internalization and degradation, and abolishing S1P gradient sensing to retain lymphocytes in lymphoid organs and peripheral tissues (PMID:37039481, PMID:16525420, PMID:20463015, PMID:25624457). Acting downstream of type I interferon signaling, this CD69–S1PR1 axis governs thymocyte export and tissue-resident memory T cell formation (PMID:16525420, PMID:12039905, PMID:25624457). Beyond S1PR1, CD69 associates with additional membrane partners to shape T cell fate: it binds the LAT1-CD98 amino acid transporter to control L-tryptophan uptake and AhR-dependent IL-22 secretion, and its cytoplasmic tail engages the Jak3/Stat5 pathway to restrain RORγt-driven Th17 differentiation (PMID:27376471, PMID:20696842). CD69 recognizes natural extracellular ligands—galectin-1 and the S100A8/S100A9 complex—in a carbohydrate- and glycosylation-dependent manner, linking ligand engagement to Th17 suppression and Treg generation (PMID:24752896, PMID:26296369). Upon antibody crosslinking CD69 transduces an activating signal through a Src-family/Syk–PLCγ2–Vav1 cascade that activates ERK and Ca2+ influx to drive NK cell degranulation and cytotoxicity, and—together with PKC co-stimulation—IL-2/IFN-γ gene expression and T cell proliferation (PMID:2501389, PMID:12077230, PMID:10671222). Functionally, CD69 negatively regulates antitumor T cell effector function and exhaustion via TOX, modulates Treg suppression through AhR-dependent CD39, and downregulates endothelial VWF expression to limit thrombosis (PMID:30085193, PMID:37216576, PMID:36066993, PMID:30582456).

Mechanistic history

Synthesis pass · year-by-year structured walk · 15 steps
  1. 1989 High

    Established that CD69 is not merely an activation marker but a signaling receptor by showing that its crosslinking transduces a defined activating signal in T cells.

    Evidence Anti-CD69 mAb crosslinking with Ca2+, cytokine gene expression, and proliferation readouts in T cells

    PMID:2501389

    Open questions at the time
    • Did not identify the proximal kinases or adaptors
    • PKC co-stimulation requirement left the autonomous signaling capacity undefined
  2. 1990 High

    Defined the physical nature of CD69 as a phosphorylated disulfide-linked homodimer and showed its signaling extends beyond lymphocytes to platelet activation.

    Evidence Biochemical characterization and anti-CD69 crosslinking aggregation/degranulation assays in human platelets

    PMID:2388032

    Open questions at the time
    • No molecular receptor or downstream pathway resolved
    • Physiological ligand on platelets unknown
  3. 1993 High

    Provided the foundational molecular identity—cloning revealed CD69 as a type II C-type lectin glycoprotein related to NK receptor families, framing all later structure-function work.

    Evidence cDNA cloning, functional COS-7 expression, chromosomal mapping, homology analysis

    PMID:8340758

    Open questions at the time
    • No natural ligand identified at this stage
    • Lectin domain glycan specificity unresolved
  4. 1994 High

    Connected CD69 induction to TCR signaling biochemistry by placing p21ras activation upstream of CD69 surface expression.

    Evidence Constitutively active and dominant-negative Ras constructs with GTP-Ras IP and AP-1 reporter in Jurkat cells

    PMID:7907294

    Open questions at the time
    • Transcription factors directly driving the CD69 promoter not defined here
    • Relationship of Ras pathway to lineage-specific expression unclear
  5. 2002 High

    Dissected the CD69 outgoing signaling cascade in NK cells, identifying Src→Syk→PLCγ2/Vav1 as the effector axis for cytotoxicity.

    Evidence Anti-CD69 crosslinking with IP/kinase assays, Src/Syk inhibitors, and cytotoxicity readouts in IL-2-activated NK cells

    PMID:12077230

    Open questions at the time
    • Direct cytoplasmic adaptor linking CD69 to Src/Syk not identified
    • How the short cytoplasmic tail nucleates kinase recruitment unresolved
  6. 2002 High

    Demonstrated genetically that CD69 controls thymocyte egress, separating its retention function from any role in maturation or selection.

    Evidence Dose-dependent CD69 transgenic mouse with thymic export quantification and selection/signaling controls

    PMID:12039905

    Open questions at the time
    • Molecular mechanism of retention not yet identified (pre-S1PR1 discovery)
  7. 2006 High

    Identified the central mechanistic partner—CD69 physically complexes with S1PR1 to downmodulate it, explaining lymphocyte retention downstream of type I IFN.

    Evidence Co-IP, coexpression chemotaxis assays, CD69-/- mice with poly(I:C)/LCMV, CD69-CD3ζ chimera reporter

    PMID:16525420

    Open questions at the time
    • Interface residues and structural basis unknown
    • Whether interaction is direct or requires accessory proteins unresolved
  8. 2010 High

    Mapped the CD69–S1PR1 interaction to transmembrane/membrane-proximal domains and S1PR1-TM4, and linked it to S1PR1 degradation and a ligand-bound-like conformation.

    Evidence CD69/NKRp1A domain swaps, S1PR1 mutagenesis, radioligand binding, T cell egress assays

    PMID:20463015

    Open questions at the time
    • Atomic structure of the complex not yet resolved
    • Mechanism of CD69-induced degradation not defined
  9. 2010 High

    Revealed a cytoplasmic-tail signaling function: CD69 engages Jak3/Stat5 to restrain Th17 differentiation, broadening its role from migration to T cell fate.

    Evidence Co-IP of CD69 tail with Jak3/Stat5, in vitro Th17 differentiation of CD69-/- cells, Jak3 inhibition, IL-2 rescue, in vivo models

    PMID:20696842

    Open questions at the time
    • Direct binding interface between cytoplasmic tail and Jak3 not mapped
    • Whether association is constitutive or ligand-induced unclear
  10. 2014 High

    Identified galectin-1 as a bona fide carbohydrate-dependent ligand of CD69, providing a physiological trigger for its Th17-suppressive function.

    Evidence CD69-ECD pulldown + MS, surface plasmon resonance, blocking antibodies, Th17 assays

    PMID:24752896

    Open questions at the time
    • Downstream signaling triggered by galectin-1 engagement not dissected
    • Affinity in physiological membrane context uncertain
  11. 2015 Medium

    Identified the S100A8/S100A9 complex as a second natural ligand and showed CD69 N-glycan sialylation gates ligand-driven Treg generation via SOCS3/STAT3.

    Evidence IP-MS, in vitro binding/competition, glycomics, CD69 RNAi, STAT3 signaling readouts in human PBMCs

    PMID:26296369

    Open questions at the time
    • Single-lab findings without independent replication
    • How glycan editing is regulated in vivo unknown
  12. 2015 High

    Tied CD69 surface expression to tissue-resident memory formation by linking it to S1PR1 transcriptional downregulation and prolonged peripheral retention.

    Evidence Flow/gene expression of skin CD8 T cells, CD69-/- mice, type I IFNR manipulation, retention/memory assays

    PMID:25624457

    Open questions at the time
    • Mechanism coupling CD69 to S1PR1 transcriptional repression not defined
    • Generality across non-skin tissues not addressed
  13. 2016 High

    Discovered a metabolic regulatory function: CD69 associates with LAT1-CD98 to control tryptophan uptake and AhR-dependent IL-22, linking it to psoriasis.

    Evidence Co-IP, transporter surface flow cytometry, metabolite measurement, CD69-/- psoriasis model with in vivo rescue

    PMID:27376471

    Open questions at the time
    • Stoichiometry and structural basis of the CD69–LAT1-CD98 interaction unknown
    • Whether the same complex operates in other T cell subsets unclear
  14. 2023 High

    Provided the atomic mechanism: cryo-EM showed CD69-TM contacts S1PR1-TM4 to allosterically activate the receptor and engage Gi, establishing CD69 as a cis protein agonist.

    Evidence Cryo-EM of CD69–S1PR1–Gi, interface mutagenesis, receptor internalization assays

    PMID:37039481

    Open questions at the time
    • Structure does not capture the degradation/trafficking step
    • How CD69 dimer asymmetry is regulated in cells unresolved
  15. 2023 Medium

    Connected CD69 to tumor T cell differentiation by showing it controls TOX expression, defining a checkpoint-combinable target.

    Evidence CD69-/- tumor model, TOX expression analysis in tumor-draining lymph nodes, anti-CD69 + anti-PD-1 therapy

    PMID:37216576

    Open questions at the time
    • Single-lab study without independent replication
    • Molecular link between CD69 signaling and TOX transcription not defined

Open questions

Synthesis pass · forward-looking unresolved questions
  • How CD69's multiple cis membrane interactions (S1PR1, LAT1-CD98), its glycan-dependent ligand engagements, and its cytoplasmic Jak3/Stat5 coupling are integrated and switched within a single cell remains unresolved.
  • No unified model of how one CD69 dimer partitions among distinct partner complexes
  • Cytoplasmic tail adaptor(s) coupling CD69 to Src/Syk and Jak3 not biochemically identified
  • Quantitative rules governing glycosylation-dependent ligand selectivity unknown

Mechanism profile

Synthesis pass · controlled-vocabulary classification · explore literature graph →
Molecular activity
GO:0060089 molecular transducer activity 3 GO:0098772 molecular function regulator activity 3 GO:0008092 cytoskeletal protein binding 2
Localization
GO:0005886 plasma membrane 4 GO:0005794 Golgi apparatus 1
Pathway
R-HSA-162582 Signal Transduction 4 R-HSA-168256 Immune System 4 R-HSA-9609507 Protein localization 3
Partners
JAK3LGALS1S100A8S100A9S1PR1SLC3A2SLC7A5STAT5

Evidence

Reading pass · 30 per-paper findings extracted from the source corpus
Year Finding Method Journal Conf PMIDs
2023 Cryo-EM structure of CD69-bound S1PR1 coupled to heterotrimeric Gi complex revealed that the transmembrane helix (TM) of one protomer of the CD69 homodimer contacts S1PR1-TM4, allosterically inducing movement of S1PR1-TMs 5-6 to directly activate the receptor and engage Gi. Mutations at the interface reduced CD69-S1PR1 interactions and receptor internalization. CD69 thus acts in cis as a protein agonist of S1PR1, promoting Gi-dependent S1PR1 internalization, loss of S1P gradient sensing, and inhibition of lymphocyte egress. Cryo-EM structure determination, mutagenesis of interface residues, receptor internalization assays eLife High 37039481
2006 CD69 forms a physical complex with S1PR1 (but not the related receptor S1PR3), inhibits S1PR1 chemotactic function, and leads to downmodulation of S1PR1 surface expression. This mechanism operates downstream of IFN-α/β signaling to promote lymphocyte retention in lymphoid organs. CD69-/- cells retained S1PR1 function after IFN-α/β exposure, and S1PR1 crosslinking co-activated a CD69-CD3ζ chimera. Co-immunoprecipitation, coexpression chemotaxis assays, CD69-/- mouse model with poly(I:C) and LCMV infection, reporter assay with CD69-CD3ζ chimera Nature High 16525420
2010 CD69 suppresses S1PR1 function through an integral membrane interaction requiring the transmembrane and membrane-proximal domains of CD69 and transmembrane helix 4 of S1PR1. N-linked glycosylation, tyrosine sulfation, and desensitization motifs of S1PR1 are not required. CD69 expression leads to reduction of S1PR1 in cell lysates (likely degradation), and the S1PR1-CD69 complex exhibits a longer S1P binding half-life than S1PR1 alone, suggesting CD69 induces a ligand-bound-like S1PR1 conformation that facilitates internalization. A non-S1PR1-binding CD69 mutant failed to inhibit T cell egress. Domain-swapping between CD69 and NKRp1A, S1PR1 mutagenesis, radioligand binding assays, T cell egress assays with CD69 mutants The Journal of biological chemistry High 20463015
2016 CD69 associates with the aromatic-amino-acid transporter complex LAT1-CD98 (SLC7A5-SLC3A2), regulating its surface expression and uptake of L-tryptophan. This controls intracellular L-Trp-derived AhR activators, thereby governing AhR-dependent IL-22 secretion by γδ T cells and contributing to psoriasis pathogenesis. In vivo administration of L-Trp, an AhR inhibitor, or IL-22 neutralization abrogated differences between CD69-deficient and wild-type mice in skin inflammation. Co-immunoprecipitation of CD69 with LAT1-CD98, flow cytometry of transporter surface expression, metabolite measurement, CD69-/- mouse model with IL-23-induced psoriasis, in vivo rescue experiments Nature immunology High 27376471
2010 CD69 limits Th17 cell differentiation through association of its cytoplasmic tail with the Jak3/Stat5 signaling pathway. CD69 deficiency in CD4+ T cells leads to enhanced RORγt transcription and IL-17 production. Selective Jak3 inhibition enhanced RORγt transcription, and exogenous IL-2 restored Stat5 phosphorylation and inhibited the enhanced Th17 differentiation in CD69-deficient cells. Biochemical co-association of CD69 cytoplasmic tail with Jak3/Stat5 (immunoprecipitation), in vitro Th17 differentiation of CD69-/- T cells, Jak3 inhibition, IL-2 rescue experiments, in vivo OVA-specific TCR transgenic and collagen immunization models Molecular and cellular biology High 20696842
2014 Galectin-1 was identified as a natural ligand for CD69 on dendritic cells. The interaction is direct, specific, and carbohydrate-dependent, as shown by surface plasmon resonance and anti-CD69 blocking. CD69-galectin-1 interaction mediates the negative effect of galectin-1 on Th17 cell differentiation in both human and mouse T cells. Pulldown with CD69-extracellular domain fusion protein followed by mass spectrometry, surface plasmon resonance, blocking antibodies, Th17 differentiation functional assays Molecular and cellular biology High 24752896
2015 The S100A8/S100A9 complex was identified as a natural ligand for CD69 in human PBMCs. The interaction is glycosylation-dependent: removal of N-linked glycans from CD69 (peptide-N-glycosidase treatment) abolished the association, and removal of sialic acid from CD69 N-glycans reversed Treg cell generation. CD69-S100A8/S100A9 interaction upregulates SOCS3, inhibiting STAT3 signaling and supporting TGF-β secretion, thereby promoting Treg differentiation. Immunoprecipitation and mass spectrometry, in vitro binding and competition assay, glycomics analysis of CD69, CD69 RNAi knockdown, STAT3 signaling measurement FASEB journal Medium 26296369
1989 Cross-linking of CD69 by monoclonal antibody induces prolonged elevation of intracellular Ca2+ primarily through extracellular Ca2+ influx. When combined with PKC activation (by PMA), CD69 stimulation induces IL-2 and IFN-γ gene expression, CD25 upregulation, and IL-2-dependent T cell proliferation. CD69-mediated Ca2+ signal alone cannot activate PKC and cannot trigger cytotoxicity programs. Anti-CD69 mAb crosslinking, intracellular Ca2+ measurement, cytokine gene expression assay, proliferation assay, cyclosporin A inhibition Journal of immunology High 2501389
1990 CD69 is constitutively expressed on human platelets as a phosphorylated disulfide-linked homodimer. Anti-CD69 mAb crosslinking induces platelet aggregation in a dose-dependent manner, associated with Ca2+ influx, platelet degranulation (ATP release), and production of thromboxane B2 and PGE2, indicating activation of arachidonic acid metabolism via cyclooxygenase. Flow cytometry and biochemical characterization of platelet CD69, anti-CD69 mAb crosslinking aggregation assay, Ca2+ influx measurement, ATP release assay, thromboxane/prostaglandin ELISA The Journal of experimental medicine High 2388032
2002 CD69 engagement in IL-2-activated human NK cells leads to rapid and selective activation of the tyrosine kinase Syk (but not ZAP70). Src family kinases (including Lck) are required upstream of Syk activation. Syk and Src kinases control CD69-triggered tyrosine phosphorylation and activation of PLCγ2 and the Rho-family GEF Vav1, which are responsible for CD69-triggered NK cell cytotoxicity. Anti-CD69 mAb crosslinking in IL-2-activated NK cells and RBL transfectants, immunoprecipitation and kinase activity assays, Src/Syk inhibitors, cytotoxicity assays Journal of immunology High 12077230
2000 CD69 engagement activates extracellular signal-regulated kinases (ERK/MAPK), and this ERK activation is required for CD69-mediated cell degranulation. Co-engagement of the CD94/NKG2-A inhibitory receptor suppresses CD69-triggered ERK activation and thereby inhibits CD69-mediated degranulation in RBL transfectants and NK cell cytotoxicity. RBL transfectants expressing CD69 ± CD94/NKG2-A, ERK activation assay, degranulation assay, NK cytotoxicity assay with inhibitory receptor co-crosslinking European journal of immunology Medium 10671222
1993 CD69 cDNA encodes a 199-amino-acid type II membrane glycoprotein with extracellular C-type lectin domain, transmembrane, and intracellular domains. Transient expression of the CD69 cDNA in COS-7 cells recapitulated native CD69 properties. The gene maps to chromosome 12p13-p12 and is a member of the Ca2+-dependent (C-type) lectin superfamily, structurally related to NKG2, NKR-P1, and Ly49 family NK receptors. PCR-based cDNA cloning from peptide sequences, transient expression in COS-7 cells, somatic cell hybrid DNA analysis, fluorescence in situ hybridization, protein sequence homology analysis The Journal of experimental medicine High 8340758
1994 Constitutively active v-Ha-ras induced CD69 surface expression in Jurkat T cells, and a dominant-negative c-Ha-ras-N17 mutant markedly reduced TCR/CD3-mediated CD69 induction, demonstrating a central role for p21ras activation in TCR/CD3-mediated CD69 expression. Transfection of constitutively active and dominant-negative Ras constructs in Jurkat cells, GTP-bound Ras immunoprecipitation, AP-1-CAT reporter assay, flow cytometry of CD69 expression European journal of immunology High 7907294
2002 Constitutive surface expression of CD69 in transgenic mice caused accumulation of phenotypically and functionally mature thymocytes in the thymic medulla with failure of export to the periphery, correlating with transgene dose and CD69 surface levels. CD69 did not affect T cell maturation, TCR signaling, or thymocyte selection, indicating a specific role in controlling thymocyte egress from the thymus. CD69 transgenic mouse generation and characterization, flow cytometry of thymic subsets, functional assays for TCR signaling and selection, thymic export quantification International immunology High 12039905
2000 CD69-/- mice showed largely normal T cell development, selection, NK and CTL cytotoxic activity, but B cell development was affected: the B220hi IgMneg bone marrow pre-B cell compartment was augmented, and CD69 deficiency led to slightly increased IgG2a and IgM responses to immunization. Gene-targeted CD69-/- mice, flow cytometry of hematopoietic subsets, TCR transgenic selection model, NK and CTL cytotoxicity assays, immunization and antibody measurement Blood High 10733501
1992 In neutrophils, CD69 molecules are stored intracellularly (likely in a trans-Golgi structure, based on brefeldin A insensitivity) and are rapidly mobilized to the cell surface upon activation by PMA or fMLP independently of new protein synthesis. CD69 stimulation in neutrophils induces Ca2+ influx and enhances lysozyme release, suggesting a role in granule exocytosis via a Ca2+-dependent mechanism. Flow cytometry of surface vs. intracellular CD69, cycloheximide and brefeldin A treatment, immunoprecipitation, Ca2+ flux measurement, lysozyme release assay Cellular immunology Medium 1586955
2000 Chimeric domain-swap analysis between CD69 and CD23 showed that the neck region (Cys68) is important for CD69 dimerization. The cytoplasmic domain of CD69 independently determines the type of signal transduced (Ca2+-dependent extracellular Ca2+ uptake and TNF-α synthesis), regardless of receptor oligomerization state. CD69 cytoplasmic domain-mediated TNF-α production was additive to FcεRI-mediated TNF-α in mast cells. CD69/CD23 chimeric receptor construction and functional expression in RBL-2H3 and Jurkat cells, Ca2+ flux measurement, serotonin release assay, TNF-α synthesis assay Journal of immunology Medium 11034393
2015 CD69 surface expression on skin-infiltrating CD8 T cells (regulated by local antigen stimulation and type I IFNR signaling) coincides with transcriptional downregulation of S1PR1 and is a critical determinant of prolonged T cell retention and local memory T cell formation in peripheral tissues. Flow cytometry and gene expression analysis of CD8 T cells in skin, CD69-/- mouse model, type I IFNR signaling manipulation, tissue retention and memory formation assays Journal of immunology High 25624457
2018 Anti-CD69 mAb treatment attenuated T cell exhaustion and tumor progression in murine breast cancer. CD69 deficiency in tumor-bearing mice showed reduced tumor growth with increased tumor-infiltrating lymphocytes, less T cell exhaustion, and enhanced IFNγ production, indicating CD69 negatively regulates effector function of intratumoral T cells and promotes T cell exhaustion. CD69-/- mouse tumor model (4T1-luc2 breast cancer), anti-CD69 mAb treatment, flow cytometry of tumor-infiltrating lymphocytes, exhaustion marker analysis, IFNγ production measurement International immunology Medium 30085193
2023 CD69 expression on tumor-specific CD8+ T cells in tumor-draining lymph nodes controls their differentiation by regulating TOX transcription factor expression. CD69 deficiency diminished TOX expression in tumor-specific CD8+ T cells, promoting generation of functional terminally differentiated CD8+ T cells. Anti-CD69 administration combined with anti-PD-1 showed enhanced antitumor effect. CD69-/- mouse tumor model, flow cytometry and gene expression analysis in tumor-draining lymph nodes, TOX expression measurement, anti-CD69 + anti-PD-1 combination therapy Cancer immunology research Medium 37216576
2018 CD69 targeting with anti-CD69 mAb induced rapid and massive mobilization of bone marrow leukocytes and hematopoietic stem and progenitor cells (HSPCs). This mobilization was inhibited by S1P desensitization with FTY720, and was accompanied by increased S1PR1 and CXCR4 expression. mTOR pathway activation (increased p70S6K, S6, 4E-BP1 phosphorylation) was detected after anti-CD69 treatment, and rapamycin inhibited anti-CD69-induced HSPC mobilization. Anti-CD69 mAb in vivo treatment, flow cytometry of mobilized BM cells, FTY720 and rapamycin pharmacological inhibition, phosphoprotein analysis by Western blot Leukemia Medium 29483712
2009 CD69 expressed on CD4 T cells is required for their migration into asthmatic lung, and for Th2 response induction. CD69 deficiency compromised CD4 T cell migration into the asthmatic lung and reduced VCAM-1 expression, suggesting VCAM-1 involvement in CD69-dependent Th2 cell migration. CD69-/- mouse OVA-induced airway inflammation model, adoptive transfer of antigen-primed CD4 T cells, lung CD4 T cell migration analysis, VCAM-1 expression measurement, anti-CD69 mAb treatment Journal of immunology Medium 19923457
2013 CD69 deficiency in CD4 T cells increases expression of chemokines CCL-1, CXCL-10, and CCL-19, and increases expression/affinity of chemokine receptors, resulting in enhanced in vitro migration toward chemokine stimuli. In vivo, CD69-/- CD4 T cells accumulate in greater numbers in intestinal colonic lamina propria during colitis, and neutralization of these chemokines significantly decreased histopathological signs of colitis in CD69-/- mice. CD69-/- mouse competitive homing assay, DSS-induced colitis and antigen-specific transfer colitis, chemokine/receptor expression analysis, chemokine neutralization in vivo, in vitro migration assay PloS one Medium 23776480
2013 CD69 mRNA expression in monocytes is induced by TGF-β and 1α,25-dihydroxyvitamin D3 as a primary target gene. Upregulation depends on Smad3 (shown by Smad3 knockdown) and on TAK1-mediated p38 MAPK activation. TGF-β and 1α,25(OH)2D3 do not influence CD69 mRNA stability; the effect is specific to monocytes and not observed in T or B cell lines. qPCR kinetics, mRNA stability assay with transcription inhibitor and 3'UTR reporter, Smad3 functional knockdown, MAPK inhibitor panel, promoter reporter assays PloS one Medium 23696902
2022 CD69 expression on Tregs increases survival after myocardial infarction in mice. CD69+ Tregs, by induction of AhR-dependent CD39 ectonucleotidase activity, induced apoptosis and decreased IL-17A production in γδT cells. Adoptive transfer of CD69+ Tregs into Cd69-/- mice after coronary ligation reduced IL-17+ γδT cell recruitment and increased survival. CD69-/- mouse coronary ligation model, adoptive transfer of CD69+ Tregs, AhR inhibition, CD39 ectonucleotidase activity assay, flow cytometry of γδT cells The Journal of clinical investigation Medium 36066993
1996 CD69 ligation induces apoptosis in GM-CSF-cultured eosinophils in a crosslinking-dependent manner, independent of TGF-β1. This apoptosis requires molecular crosslinking and does not correlate with eosinophil peroxidase release. Anti-CD69 mAb and F(ab)2 fragments applied to GM-CSF-cultured eosinophils, apoptosis measurement by morphology, DNA laddering, and flow cytometry, TGF-β1 neutralization, EPO release assay Blood Medium 8639899
1996 LPS/anti-CD69 co-stimulation-induced monocyte apoptosis involves at least three independent, non-redundant signaling pathways: (i) phospholipase A2 and lipoxygenase-mediated arachidonic acid metabolism, (ii) NO generation, and (iii) pertussis toxin-sensitive (ADP-ribosylation-dependent) G-protein events. Each pathway is necessary but insufficient alone to induce apoptosis. Inhibitors of PLA2, lipoxygenase, NO synthesis, pertussis toxin (wild-type vs. ADP-ribosylation-deficient mutant), TNF production and NO generation assays Cellular immunology Medium 8964080
1997 In murine macrophages, CD69 expression is not constitutive but is induced by IFN-γ plus LPS, TNF-α, or LPS alone, and is inhibited by PGE2 or dibutyryl-cAMP. Anti-CD69 mAb stimulation of macrophages in the presence of IFN-γ induces nitric oxide production and TNF-α release, and triggers elimination of intracellular Leishmania parasites. Flow cytometry of CD69 expression under various stimuli, pharmacological inhibition (PGE2, cAMP), anti-CD69 mAb stimulation, NO and TNF-α assays, Leishmania elimination assay Journal of leukocyte biology Medium 9307073
2009 The CD69 gene is differentially regulated in T and B cells by evolutionarily conserved promoter-distal noncoding sequences (CNS1-4). CNS2 and CNS4 function as inducible enhancers in T cells. The CD69 promoter alone supports positive selection-dependent thymic expression but not mature lymphocyte expression. CNS1-4 elements interact both positively (CNS3, CNS4) and negatively (CNS1, CNS2 together) with the promoter to confer developmental-stage and lineage-specific regulation. DNase I hypersensitivity mapping, chromatin immunoprecipitation for epigenetic modifications, transient transfection reporter assays, transgenic mouse analysis with CNS combinations Journal of immunology Medium 19841192
2019 CD69 deficiency in mice promotes a prothrombotic phenotype with increased plasma VWF content and activity, increased VWF expression in brain vessels, and greater fibrinogen accumulation in ischemic brain tissue after stroke. Ischemia upregulated Cd69 mRNA in brain endothelial cells. This worsening effect was not attributable to lymphocytes or other hematopoietic cells (shown by chimeric mice). Blocking VWF reduced infarct volume and reversed the detrimental effect of CD69 deficiency, indicating CD69 acts as a downregulator of endothelial activation. CD69-/- and chimeric mice with MCAO stroke model, endothelial cell sorting and mRNA analysis, VWF ELISA and activity assay, fibrin(ogen) immunostaining, VWF-blocking antibody treatment Circulation research Medium 30582456

Source papers

Stage 0 corpus · 100 papers · ranked by NIH iCite citations
Year Title Journal Citations PMID
2006 CD69 acts downstream of interferon-alpha/beta to inhibit S1P1 and lymphocyte egress from lymphoid organs. Nature 983 16525420
2017 CD69: from activation marker to metabolic gatekeeper. European journal of immunology 747 28475283
1994 The activation antigen CD69. Stem cells (Dayton, Ohio) 453 7804122
2015 Cutting edge: CD69 interference with sphingosine-1-phosphate receptor function regulates peripheral T cell retention. Journal of immunology (Baltimore, Md. : 1950) 434 25624457
1994 The CD69 receptor: a multipurpose cell-surface trigger for hematopoietic cells. Immunology today 396 7945773
1989 T cell activation via Leu-23 (CD69). Journal of immunology (Baltimore, Md. : 1950) 266 2501389
1993 Molecular cloning, expression, and chromosomal localization of the human earliest lymphocyte activation antigen AIM/CD69, a new member of the C-type animal lectin superfamily of signal-transmitting receptors. The Journal of experimental medicine 263 8340758
2010 CD69 suppresses sphingosine 1-phosophate receptor-1 (S1P1) function through interaction with membrane helix 4. The Journal of biological chemistry 254 20463015
1993 CD69 expression during selection and maturation of CD4+8+ thymocytes. European journal of immunology 251 8095460
1993 CD69 cell surface expression identifies developing thymocytes which audition for T cell antigen receptor-mediated positive selection. International immunology 206 7902130
1999 CD69 and regulation of the immune function. Immunopharmacology and immunotoxicology 188 10466080
1999 Early CD69 expression on peripheral blood lymphocytes from children with dengue hemorrhagic fever. The Journal of infectious diseases 161 10515800
2013 Is CD69 an effective brake to control inflammatory diseases? Trends in molecular medicine 153 23954168
1994 Involvement of p21ras activation in T cell CD69 expression. European journal of immunology 127 7907294
2002 A potential role for CD69 in thymocyte emigration. International immunology 125 12039905
1994 The mouse CD69 gene. Structure, expression, and mapping to the NK gene complex. Journal of immunology (Baltimore, Md. : 1950) 115 8301128
2010 CD69 association with Jak3/Stat5 proteins regulates Th17 cell differentiation. Molecular and cellular biology 111 20696842
1994 Regulation of RAG-1 and CD69 expression in the thymus during positive and negative selection. European journal of immunology 105 8020549
1990 CD69 is expressed on platelets and mediates platelet activation and aggregation. The Journal of experimental medicine 104 2388032
2016 CD69 controls the uptake of L-tryptophan through LAT1-CD98 and AhR-dependent secretion of IL-22 in psoriasis. Nature immunology 101 27376471
2018 CD69 enhances immunosuppressive function of regulatory T-cells and attenuates colitis by prompting IL-10 production. Cell death & disease 94 30185773
2000 Phenotypic and functional characteristics of hematopoietic cell lineages in CD69-deficient mice. Blood 88 10733501
2014 The leukocyte activation receptor CD69 controls T cell differentiation through its interaction with galectin-1. Molecular and cellular biology 84 24752896
1997 Temporal dynamics of CD69 expression on lymphoid cells. Journal of immunological methods 83 9448032
1998 CD44 and CD69 represent different types of cell-surface activation markers for human eosinophils. American journal of respiratory cell and molecular biology 81 9618391
2014 Maintenance of immune tolerance by Foxp3+ regulatory T cells requires CD69 expression. Journal of autoimmunity 80 24934597
2016 Human Lymphoid Tissues Harbor a Distinct CD69+CXCR6+ NK Cell Population. Journal of immunology (Baltimore, Md. : 1950) 79 27226093
2018 Crucial role of CD69 in anti-tumor immunity through regulating the exhaustion of tumor-infiltrating T cells. International immunology 78 30085193
1996 Ligation of CD69 induces apoptosis and cell death in human eosinophils cultured with granulocyte-macrophage colony-stimulating factor. Blood 72 8639899
2009 CD69 controls the pathogenesis of allergic airway inflammation. Journal of immunology (Baltimore, Md. : 1950) 70 19923457
2015 Glycosylation-dependent interaction between CD69 and S100A8/S100A9 complex is required for regulatory T-cell differentiation. FASEB journal : official publication of the Federation of American Societies for Experimental Biology 66 26296369
2021 The Clinical Significance of Hepatic CD69+ CD103+ CD8+ Resident-Memory T Cells in Autoimmune Hepatitis. Hepatology (Baltimore, Md.) 65 33554350
2010 The leukocyte activation antigen CD69 limits allergic asthma and skin contact hypersensitivity. The Journal of allergy and clinical immunology 64 20621339
1992 CD69 molecule in human neutrophils: its expression and role in signal-transducing mechanisms. Cellular immunology 64 1586955
2000 CD69-triggered ERK activation and functions are negatively regulated by CD94 / NKG2-A inhibitory receptor. European journal of immunology 59 10671222
2019 Expression of Tmem119/Sall1 and Ccr2/CD69 in FACS-Sorted Microglia- and Monocyte/Macrophage-Enriched Cell Populations After Intracerebral Hemorrhage. Frontiers in cellular neuroscience 58 30687011
2002 Activation markers of human basophils: CD69 expression is strongly and preferentially induced by IL-3. The Journal of allergy and clinical immunology 55 11994706
2005 Induction of tumor NK-cell immunity by anti-CD69 antibody therapy. Blood 53 15692061
2013 The early activation marker CD69 regulates the expression of chemokines and CD4 T cell accumulation in intestine. PloS one 52 23776480
2011 CD69: an unexpected regulator of TH17 cell-driven inflammatory responses. Science signaling 49 21427408
2006 CD69 down-modulation and inhibition of thymic egress by short- and long-term selective chemical agonism of sphingosine 1-phosphate receptors. European journal of immunology 47 16342326
2009 CD69 gene is differentially regulated in T and B cells by evolutionarily conserved promoter-distal elements. Journal of immunology (Baltimore, Md. : 1950) 46 19841192
1997 Expression and function of the early activation antigen CD69 in murine macrophages. Journal of leukocyte biology 46 9307073
2022 CD69 expression on regulatory T cells protects from immune damage after myocardial infarction. The Journal of clinical investigation 45 36066993
2007 CD69 expression as an index of T-cell function: assay standardization, validation and use in monitoring immune recovery. Cytotherapy 44 17453964
1992 Constitutive expression of CD69 in interspecies T-cell hybrids and locus assignment to human chromosome 12. Immunogenetics 44 1612643
2019 Adipose Tissue in Persons With HIV Is Enriched for CD4+ T Effector Memory and T Effector Memory RA+ Cells, Which Show Higher CD69 Expression and CD57, CX3CR1, GPR56 Co-expression With Increasing Glucose Intolerance. Frontiers in immunology 43 30941121
1995 CD69+ and HLA-DR+ activation antigens on peripheral blood lymphocyte populations in metastatic breast and ovarian cancer patients: correlations with survival following active specific immunotherapy. International journal of cancer 41 7538976
1997 Abnormalities in CD69 expression, cytosolic pH and Ca2+ during activation of lymphocytes from patients with systemic lupus erythematosus. Lupus 40 9116719
2020 Increased CD69 expression on activated eosinophils in eosinophilic chronic rhinosinusitis correlates with clinical findings. Allergology international : official journal of the Japanese Society of Allergology 39 31928947
2000 Functional analysis of ligand-binding and signal transduction domains of CD69 and CD23 C-type lectin leukocyte receptors. Journal of immunology (Baltimore, Md. : 1950) 37 11034393
2021 Implication of CD69+ CD103+ tissue-resident-like CD8+ T cells as a potential immunotherapeutic target for cholangiocarcinoma. Liver international : official journal of the International Association for the Study of the Liver 36 33548061
2013 Dendritic cell activation, phagocytosis and CD69 expression on cognate T cells are suppressed by n-3 long-chain polyunsaturated fatty acids. Immunology 36 23373457
2002 Src-dependent Syk activation controls CD69-mediated signaling and function on human NK cells. Journal of immunology (Baltimore, Md. : 1950) 35 12077230
2022 The cellular and molecular basis of CD69 function in anti-tumor immunity. International immunology 33 35689672
2016 Immune-Regulatory Molecule CD69 Controls Peritoneal Fibrosis. Journal of the American Society of Nephrology : JASN 32 27151919
2014 Human hepatocellular carcinoma-infiltrating CD4⁺CD69⁺Foxp3⁻ regulatory T cell suppresses T cell response via membrane-bound TGF-β1. Journal of molecular medicine (Berlin, Germany) 32 24668348
2013 Curcumin inhibits CD4(+) T cell activation, but augments CD69 expression and TGF-β1-mediated generation of regulatory T cells at late phase. PloS one 32 23658623
2007 CLEC2A: a novel, alternatively spliced and skin-associated member of the NKC-encoded AICL-CD69-LLT1 family. Immunogenetics 32 18046548
1999 CD69 surface expression on human lung eosinophils after segmental allergen provocation. The European respiratory journal 32 10445598
2023 The Expression of Activation Markers CD25 and CD69 Increases during Biologic Treatment of Psoriasis. Journal of clinical medicine 31 37892710
2007 Chicken CD69 and CD94/NKG2-like genes in a chromosomal region syntenic to mammalian natural killer gene complex. Immunogenetics 31 17505822
1995 Characterization and regulation of CD69 expression on rheumatoid arthritis synovial fluid T cells. The Journal of rheumatology 31 7783055
2023 Transmembrane protein CD69 acts as an S1PR1 agonist. eLife 30 37039481
2023 Lung-resident CD69+ST2+ TH2 cells mediate long-term type 2 memory to inhaled antigen in mice. The Journal of allergy and clinical immunology 29 36720287
2018 Combined CD25, CD64, and CD69 biomarker panel for flow cytometry diagnosis of sepsis. Talanta 29 30262053
2023 The roles of toll-like receptor 4, CD33, CD68, CD69, or CD147/EMMPRIN for monocyte activation by the DAMP S100A8/S100A9. Frontiers in immunology 28 37056775
2020 Synovial fluid CD69+CD8+ T cells with tissue-resident phenotype mediate perforin-dependent citrullination in rheumatoid arthritis. Clinical & translational immunology 28 32528679
2022 Using CD69 PET Imaging to Monitor Immunotherapy-Induced Immune Activation. Cancer immunology research 27 35862229
2021 CD4+ and CD8+ T cells in sentinel nodes exhibit distinct pattern of PD-1, CD69, and HLA-DR expression compared to tumor tissue in oral squamous cell carcinoma. Cancer science 27 33462898
2022 CD69 and SBK1 as potential predictors of responses to PD-1/PD-L1 blockade cancer immunotherapy in lung cancer and melanoma. Frontiers in immunology 24 36045683
2019 CD4+CD69+ T cells and CD4+CD25+FoxP3+ Treg cells imbalance in peripheral blood, spleen and peritoneal lavage from pristane-induced systemic lupus erythematosus (SLE) mice. Advances in rheumatology (London, England) 24 31340848
2018 Multiparameter Affinity Microchip for Early Sepsis Diagnosis Based on CD64 and CD69 Expression and Cell Capture. Analytical chemistry 24 29799723
2020 Inverse relationship between oligoclonal expanded CD69- TTE and CD69+ TTE cells in bone marrow of multiple myeloma patients. Blood advances 23 32986791
2024 Personalized neoantigen hydrogel vaccine combined with PD-1 and CTLA-4 double blockade elicits antitumor response in liver metastases by activating intratumoral CD8+CD69+ T cells. Journal for immunotherapy of cancer 22 39694701
2020 Decreased Expression of CD69 on T Cells in Tuberculosis Infection Resisters. Frontiers in microbiology 22 32849474
2019 CD69 Plays a Beneficial Role in Ischemic Stroke by Dampening Endothelial Activation. Circulation research 22 30582456
2023 Unraveling CD69 signaling pathways, ligands and laterally associated molecules. EXCLI journal 21 37223078
2018 Anti-CD69 therapy induces rapid mobilization and high proliferation of HSPCs through S1P and mTOR. Leukemia 21 29483712
2012 CD69 does not affect the extent of T cell priming. PloS one 21 23119065
2003 CD69 expression induced by thapsigargin, phorbol ester and ouabain on thymocytes is dependent on external Ca2+ entry. Life sciences 21 12818356
1996 CD69-induced monocyte apoptosis involves multiple nonredundant signaling pathways. Cellular immunology 21 8964080
2002 CD69 expression on lymphocytes and interleukin-15 levels in synovial fluids from different inflammatory arthropathies. Rheumatology international 20 11958434
2024 Integrative analysis discovers Imidurea as dual multitargeted inhibitor of CD69, CD40, SHP2, lysozyme, GATA3, cCBL, and S-cysteinase from SARS-CoV-2 and M. tuberculosis. International journal of biological macromolecules 19 38768914
2016 CD69 expression potentially predicts response to bendamustine and its modulation by ibrutinib or idelalisib enhances cytotoxic effect in chronic lymphocytic leukemia. Oncotarget 19 26701728
2002 CD69 expression correlates with expression of other markers of Th1 T cell differentiation in peripheral T cell lymphomas. Human pathology 19 11979374
2021 Discovery, optimization and biodistribution of an Affibody molecule for imaging of CD69. Scientific reports 18 34580321
2005 Enhanced expression of CD69 and CD25 antigen on human peripheral blood mononuclear cells by prolactin. Endocrine journal 18 16284445
2001 Anti-CD69 autoantibodies cross-react with low density lipoprotein receptor-related protein 2 in systemic autoimmune diseases. Journal of immunology (Baltimore, Md. : 1950) 18 11145721
2016 Distinct recirculation potential of CD69+CD103- and CD103+ thymic memory CD8+ T cells. Immunology and cell biology 17 27328704
2014 Increase of CD69, CD161 and CD94 on NK cells in women with recurrent spontaneous abortion and in vitro fertilization failure. Iranian journal of immunology : IJI 17 24975965
2023 CD69 Imposes Tumor-Specific CD8+ T-cell Fate in Tumor-Draining Lymph Nodes. Cancer immunology research 16 37216576
2023 Immuno-PET Imaging of CD69 Visualizes T-Cell Activation and Predicts Survival Following Immunotherapy in Murine Glioblastoma. Cancer research communications 16 37426447
2021 Evaluating the Timeliness and Specificity of CD69, CD64, and CD25 as Biomarkers of Sepsis in Mice. Shock (Augusta, Ga.) 16 32890312
2016 Increased CD69 Expression on Peripheral Eosinophils from Patients with Food Protein-Induced Enterocolitis Syndrome. International archives of allergy and immunology 16 27595267
2013 CD69 is a TGF-β/1α,25-dihydroxyvitamin D3 target gene in monocytes. PloS one 16 23696902
2012 Differential effect of CD69 targeting on bystander and antigen-specific T cell proliferation. Journal of leukocyte biology 16 22544938
2006 The role of CD69 in acute neutrophil-mediated inflammation. European journal of immunology 16 16983725
2004 CD69 expression on neutrophils from patients with rheumatoid arthritis. Clinical and experimental rheumatology 16 15144128
2003 Intracellular expression of CD69 in endometrial and peripheral T cells represents a useful marker in women with recurrent miscarriage: modulation after allogeneic leukocyte immunotherapy. American journal of reproductive immunology (New York, N.Y. : 1989) 16 12797521

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