| 2003 |
FoxO6 is a novel FoxO transcription factor that, unlike FoxO1/3/4, remains predominantly nuclear after growth factor stimulation due to lack of a conserved C-terminal PKB phosphorylation motif; PI3K/PKB signaling mediates its nuclear export, and a chimeric approach restoring the missing region fully restores shuttling between nucleus and cytosol. |
GFP-fusion transfection, chimeric protein analysis, PI3K/PKB pathway inhibition/stimulation, subcellular localization imaging |
The Journal of biological chemistry |
High |
12857750
|
| 2005 |
FoxO6 transcriptional activity is regulated by PI3K/PKB signaling via two phosphorylation sites, Thr26 (N-terminal PKB motif, acts as growth factor sensor) and Ser184 (forkhead domain PKB site, regulates DNA-binding), independent of nucleo-cytoplasmic shuttling; FoxO6 lacks the C-terminal PKB motif responsible for shuttling impairment and is not constitutively active. |
Site-directed mutagenesis of Thr26 and Ser184, transcriptional reporter assays, DNA-binding assays, growth factor stimulation in transfected cells |
The Biochemical journal |
High |
15987244
|
| 2011 |
FoxO6 integrates insulin signaling with hepatic gluconeogenesis; insulin inhibits FoxO6 activity by inducing its phosphorylation and disabling its transcriptional activity without altering its subcellular distribution, a mechanism distinct from other FoxO members; elevated FoxO6 activity augments gluconeogenesis and raises fasting blood glucose, while hepatic FoxO6 depletion suppresses gluconeogenesis. |
Gain- and loss-of-function transgenic/KO mice, adenoviral FoxO6 overexpression in liver, primary hepatocyte glucose production assays, insulin stimulation phosphorylation assays |
Diabetes |
High |
21940782
|
| 2012 |
FoxO6 activity in the adult hippocampus is required for memory consolidation (contextual fear conditioning, novel object recognition); FoxO6 deficiency results in decreased dendritic spine density in hippocampal neurons in vitro and in vivo, and genome-wide approaches showed FoxO6 regulates synaptic function genes upon learning. |
FoxO6 knockout mice, stereotactic viral injection into hippocampus, contextual fear conditioning, novel object recognition, dendritic spine density analysis, genome-wide transcriptomics |
Genes & development |
High |
23222102
|
| 2013 |
FOXO6 physically interacts with transcription factor HNF4 in gastric cancer cells and induces C-myc expression by associating with HNF4, mediating histone acetylation and dissociation of HDAC3 from the C-myc promoter. |
Co-immunoprecipitation, chromatin immunoprecipitation (ChIP), overexpression/knockdown experiments, reporter assays |
FEBS letters |
Medium |
23714368
|
| 2013 |
FoxO6 and PGC-1α form a regulatory loop in myogenic cells: PGC-1α enhances FoxO6 promoter activity and expression, while FoxO6 represses PGC-1α expression via direct binding to an upstream A/T-rich element (AAGATATCAAAACA, −2228 to −2215) in the PGC-1α promoter. |
Promoter reporter assays, ChIP assay, overexpression/knockdown in myogenic cells, exercise model in mice |
Bioscience reports |
Medium |
23639108
|
| 2014 |
FoxO6 stimulates hepatic VLDL-TG production by directly binding to the MTP promoter and stimulating MTP (microsomal triglyceride transfer protein) expression; insulin inhibits this by promoting FoxO6 phosphorylation and disabling its DNA-binding activity; mutations of the FoxO6 target site in the MTP promoter abolish this induction. |
Chromatin immunoprecipitation, promoter reporter assays with target-site mutagenesis, transgenic mice, HepG2 cells and human primary hepatocytes, VLDL-TG secretion assays |
Endocrinology |
High |
24437489
|
| 2015 |
FoxO6 depletion in knockout mice attenuates hepatic gluconeogenesis, lowers fasting glycemia, and reduces macrophage infiltration into liver and adipose tissues by diminishing CCR2 expression, protecting against diet-induced glucose intolerance. |
FoxO6 knockout mice, high-fat diet feeding, glucose tolerance tests, primary hepatocyte glucose production assays, macrophage infiltration analysis |
The Journal of biological chemistry |
High |
25944898
|
| 2015 |
Erlotinib treatment of EGFR-mutant lung cancer cells relieves EGFR-dependent suppression of FOXO6, which then induces SOX2 expression; SOX2 in turn represses pro-apoptotic BH3-only genes BIM and BMF, constituting a survival feedback loop attenuating oncogene-addiction cell death. |
Knockdown and ectopic expression of SOX2 and FOXO6, erlotinib treatment, apoptosis assays, in vitro and in vivo drug resistance models |
eLife |
Medium |
25686219
|
| 2015 |
FoxO6 promotes cell cycle arrest and inhibits proliferation in lung cancer cells by inducing USP7 expression, which elevates p53 protein levels. |
Overexpression and knockdown of FOXO6, western blot for USP7 and p53, cell proliferation assays |
Molecular medicine reports |
Low |
25695151
|
| 2016 |
FoxO6 binds to DAF-16-binding elements in the Plexin A4 (Plxna4) promoter region, activates Plxna4 expression, and is required for correct radial neuronal migration in the developing neocortex; ectopic Plxna4 expression rescues migration defects in FoxO6-deficient models. |
FoxO6+/- and FoxO6-/- mice, siRNA knockdown, ChIP for FoxO6 binding to Plxna4 promoter, genome-wide transcriptomics, rescue by ectopic Plxna4 expression |
Proceedings of the National Academy of Sciences of the United States of America |
High |
27791111
|
| 2018 |
FoxO6 activates Lats1 expression, thereby increasing Yap phosphorylation and activating Hippo signaling to control craniofacial growth; FoxO6-/- mice show reduced Lats1, decreased Hippo signaling, and expanded facial/skull growth; PITX2 activates FoxO6 expression upstream. |
FoxO6 knockout mice, in vitro reporter assays, in vivo cell proliferation analysis, craniofacial morphometry, MRI, in vitro Lats1 promoter and Hippo reporter assays |
PLoS genetics |
High |
30286078
|
| 2018 |
FOXO6 transcriptionally regulates Sirt6 expression in breast cancer cells, as shown by ChIP and luciferase reporter assays; FOXO6 suppresses EMT and acts as a tumor suppressor partly through this regulation. |
ChIP-qPCR, luciferase reporter assay, siRNA knockdown, invasion and migration assays |
Cancer management and research |
Medium |
30464613
|
| 2019 |
FoxO6 directly binds to and elevates IL-1β expression in hepatocytes; IL-1β in turn elevates PAR2 protein levels, decreasing hepatic insulin signaling (TF/PAR2 pathway); FoxO6-KO mice show reduced PAR2 signaling and decreased inflammatory cytokine expression. |
Virus-mediated FoxO6 activation/KO mice, siRNA knockdown in hepatocytes, IL-1β treatment, PAR2-siRNA, ChIP/binding assays implied by direct binding statement |
Redox biology |
Medium |
30974318
|
| 2019 |
5-HT1D stabilizes PIK3R1 by inhibiting its ubiquitin-mediated degradation; the 5-HT1D/PIK3R1 interaction enhances FoxO6 expression through PI3K/Akt signaling; FoxO6 can also be directly transcriptionally activated by 5-HT1D in an Akt-independent manner. |
Co-IP for PIK3R1 interaction, ubiquitination assay, overexpression/knockdown, PI3K/Akt pathway inhibition, luciferase reporter assays |
Hepatology (Baltimore, Md.) |
Medium |
30561038
|
| 2020 |
FoxO6 transcription factor interacts with C/EBP homologous protein (CHOP), an ER stress-inducible transcription factor; this physical interaction between CHOP and FoxO6 drives PPARγ expression and promotes hepatic lipid accumulation during ER stress. |
Co-immunoprecipitation (FoxO6–CHOP interaction), constitutively active FoxO6 transgenic and FoxO6-KO mice, palmitate treatment of HepG2 cells, lipid staining |
Liver international |
Medium |
32639626
|
| 2020 |
FOXO6 interacts with METTL3 to trigger transcription of GPR161, which subsequently regulates β-defensin expression in response to ETEC K88 infection; m6A methylation via METTL3 controls GPR161-dependent defensin induction. |
MeRIP-seq, Co-IP (FOXO6–METTL3 interaction), METTL3 rescue experiments, GPR161 reporter analysis |
RNA biology |
Medium |
32914682
|
| 2020 |
FoxO6 activates antioxidant gene expression (MnSOD, catalase) and its knockdown markedly increases melanin content in melanocytes; FoxO6 phosphorylation by Akt is essential for this activity; adenoviral FoxO6 activation reduces melanogenesis in UVB-exposed cells by decreasing oxidative stress. |
siRNA knockdown, adenoviral overexpression, B16F10 cells, UVB exposure model, ROS/melanin measurements, PI3K/AKT inhibition |
Redox biology |
Medium |
32863230
|
| 2020 |
FoxO6 overexpression promotes preadipocyte cell-cycle arrest (G1 phase) and apoptosis; FoxO6 directly targets and induces expression of CCNG2 (cyclin G2) as confirmed by ChIP assay; FoxO6 also suppresses early adipogenic regulators PPARγ and C/EBPα. |
ChIP assay for CCNG2 promoter binding, overexpression/knockdown in preadipocytes, cell cycle analysis, Oil-Red-O staining |
Life sciences |
Medium |
33290791
|
| 2020 |
FOXO6 directly interacts with the USP7 gene promoter and enhances its transcriptional activity, suppressing cancer cell apoptosis; USP7 in turn enhances ubiquitination of JMJD3, leading to JMJD3-mediated transcriptional activation of CLU via H3K27me3 demethylation. |
ChIP-qPCR, luciferase reporter assay, immunoprecipitation, ubiquitination assays, in vivo xenograft with USP7/JMJD3 inhibitors |
Molecular therapy oncolytics |
Medium |
33768140
|
| 2021 |
FoxO6 phosphorylation by LPS leads to NF-κB activation via Akt and Pak1 pathways in the liver; LPS-induced FoxO6 phosphorylation and inactivation are Pak1-dependent in nuclear fractions, and Pak1 activation by LPS occurs in a PI3K-independent manner; Pak1 phosphorylation permits interaction between FoxO6 and Akt. |
Transfection with FoxO6-wt virus and FoxO6-siRNA in HepG2 cells, Pak1 pathway inhibition, nuclear fractionation, aged rat liver model |
Oncotarget |
Medium |
26506521
|
| 2021 |
FoxO6 directly binds to the RAD51 promoter and activates its expression, promoting DNA damage repair in nucleus pulposus cells; FoxO6 upregulation reduces γH2AX foci formation, indicating reduced DNA damage. |
ChIP assay, luciferase reporter assay, FoxO6 overexpression, γH2AX immunofluorescence, flow cytometry |
European review for medical and pharmacological sciences |
Medium |
34533813
|
| 2021 |
PAR2 Akt-mediated phosphorylation of FoxO6 at Ser184 suppresses FoxO6 activity and contributes to ROS-mediated inflammation during skin photoaging; PAR2 knockdown suppresses Akt/NF-κB and increases FoxO6, while PAR2 overexpression decreases FoxO6. |
PAR2 KO mice, PAR2 antagonist (GB83), si-PAR2 knockdown and PAR2 overexpression in UVB-irradiated HaCaT cells, UVB-irradiated hairless mice, phospho-FoxO6 (Ser184) detection |
Redox biology |
High |
34082382
|
| 2023 |
FoxO6 promotes pathological cardiac hypertrophy and dysfunction downstream of angiotensin-II by transcriptionally activating Kif15; Kif15 in turn elevates TGF-β1 secretion from cardiomyocytes, promoting fibroblast proliferation and differentiation. |
FoxO6 KO and overexpressing mice, Ang-II infusion model, Kif15 inhibition, in vitro cardiomyocyte/fibroblast co-culture experiments, cardiac function measurements |
MedComm |
Medium |
37799807
|
| 2023 |
FOXO6 transcriptionally inhibits CTRP3 expression by binding to the CTRP3 promoter (JASPAR-predicted binding, validated by ChIP and luciferase reporter assay); FOXO6-mediated CTRP3 suppression promotes OGD/R-triggered cardiac microvascular endothelial barrier disruption via SIRT1/Nrf2 signaling. |
ChIP, luciferase reporter assay, co-transfection of CTRP3 and FOXO6 overexpression plasmids, OGD/R model, permeability assays |
Folia morphologica |
Medium |
36688407
|
| 2024 |
FoxO6 induces TXNIP expression in the liver; TXNIP acts as a key regulator upstream of the NLRP3 inflammasome, and FoxO6-driven TXNIP upregulation activates the NLRP3 inflammasome complex (including ASC and pro-caspase-1), leading to IL-1β production and lipid accumulation. |
Constitutively active FoxO6 transgenic and FoxO6-null mice, palmitate-treated HepG2 cells, inflammasome component western blot, TXNIP overexpression/knockdown |
Endocrinology and metabolism (Seoul, Korea) |
Medium |
38417829
|
| 2024 |
FoxO6 transcriptionally activates ApoC3 expression in the liver, driving lipid accumulation, hepatic steatosis, hyperlipidemia, and hyperglycemia; high glucose upregulates FoxO6, which upregulates ApoC3 and gluconeogenic genes; FoxO6-KO mice show attenuated hepatic lipid accumulation. |
FoxO6 transgenic (FoxO6-Tg) and KO mice, aged rat HFD model, liver cell cultures, ApoC3 promoter and gene expression analysis |
Aging |
Medium |
38441531
|
| 2024 |
FoxO6 physically interacts with PPARγ, and this interaction promotes hepatic lipid accumulation; betaine inhibits the FoxO6–PPARγ interaction and suppresses lipogenic gene transcription. In a separate study, FoxO6 also interacts with PPARα to suppress β-oxidation, promoting hepatic steatosis. |
Co-immunoprecipitation (FoxO6–PPARγ and FoxO6–PPARα interactions), FoxO6 transgenic/KO mice, db/db mice with betaine treatment, HepG2 cells with high glucose and FoxO6 overexpression |
Journal of medicinal food; Journal of molecular medicine (Berlin, Germany) |
Medium |
39198274 39263959
|
| 2024 |
FOXG1 upregulation in neural stem cells increases FoxO6 expression; FoxO6-null NSCs cannot efficiently exit quiescence following FOXG1 elevation; Pak1 expression is upregulated by FOXG1 and downregulated upon FOXO6 loss, suggesting FOXO6 acts downstream of FOXG1 to control quiescence exit partly via Pak1-regulated macropinocytosis. |
Foxo6 genetic knockout in NSCs, FOXG1 overexpression, cell cycle analysis, quiescence entry/exit assays, vacuole formation analysis, Pak1 expression measurement |
Disease models & mechanisms |
Medium |
39499086
|
| 2025 |
METTL3-mediated m6A modification stabilizes FOXO6 mRNA; FOXO6 transcriptionally activates TXNIP by directly binding to its promoter, promoting mitochondrial dysfunction and apoptosis in granulosa cells; TXNIP knockdown reverses effects of FOXO6 overexpression, confirming the METTL3/FOXO6/TXNIP axis in PCOS pathology. |
mRNA sequencing, MeRIP-qPCR for m6A on FOXO6 mRNA, actinomycin D mRNA stability assay, luciferase reporter assay for TXNIP promoter, siRNA knockdown and overexpression, flow cytometry for apoptosis |
FASEB journal |
Medium |
41091548
|
| 2026 |
WNT10B signals through FOXO6 to mediate metabolic reprogramming from fatty acid oxidation to glycolysis in renal tubular cells; FOXO6 transcriptionally modulates PPARA and PKM to control this metabolic reprogramming and regulate tubular senescence fate transition; ChIP-seq, bulk and single-nucleus RNA-seq confirm FOXO6 as the transcriptional mediator of the WNT10B signal. |
Wnt10b KO and transgenic CKD mouse models, ChIP-seq, bulk RNA-seq, single-nucleus RNA-seq, ChIP-qPCR for PPARA and PKM promoters, FOXO6 overexpression/knockdown |
Nature communications |
High |
41963348
|