POU domain, class 4, transcription factor 2 · UniProt Q12837
POU4F2/Brn3b is a class IV POU-domain transcription factor that serves as a master regulator of retinal ganglion cell (RGC) differentiation, axon polarization, and fate specification (PMID:8632990, PMID:7691107, PMID:10357904). It functions downstream of Atoh7/Math5 and is activated by the upstream factors DLX1/2, FEZF2, and WT1, and its expression is facilitated by the SWI/SNF ATPase Brm (PMID:28356311, PMID:26861874, PMID:12609742, PMID:17855369). Brn3b acts in parallel with Isl1 within the RGC gene regulatory network: the two proteins form a direct complex through their respective POU and LIM-HD domains and synergistically transactivate a shared set of RGC-specific genes, and their co-expression constitutes a minimally sufficient core that imposes RGC fate even in the Atoh7-null retina (PMID:18434421, PMID:24643061, PMID:25775587). Brn3b also imposes projection-neuron identity by repressing competing retinogenic factor networks and antagonizing DLX1 activity through a homeodomain interaction, thereby biasing precursors toward RGC and away from amacrine fates (PMID:18367606, PMID:21875655). Loss of Brn3b does not block initial fate commitment but causes failed differentiation, mispolarized neurites that acquire dendritic rather than axonal character, and apoptotic RGC loss (PMID:10357904, PMID:10924257). Direct target genes include Eomes, which mediates RGC differentiation and optic nerve myelination (PMID:18077589). Beyond the retina, Brn3b regulates apoptosis via a physical interaction with p53 that selectively enhances Bax transactivation (PMID:17145718), and it directly controls promoters of cyclin D1, HSP-27, and GLUT4 (PMID:17637757, PMID:15833836, PMID:26670484); through these targets it participates in metabolic glucose handling, cardiac hypertrophic responses, vascular smooth muscle integrity, and midbrain fear-circuit organization via Tac2 (PMID:26670484, PMID:31413277, PMID:38007517, PMID:37983249). The transactivation function maps to an N-terminal activation domain, while a single POU-homeodomain residue distinguishes Brn3b's regulatory polarity from its paralog Brn3a (PMID:15733064, PMID:8995448, PMID:9448000).
Establishing where Brn3b is expressed was the first step in assigning it a cell-type-specific developmental role.
Evidence cDNA cloning and immunohistochemistry across multiple species
Early biochemistry asked how Brn3 isoforms regulate DNA binding and target promoters, showing Brn3b can heterodimerize and selectively activate distinct promoters from its paralogs.
Evidence GST pulldown, EMSA, and reporter assays of Brn3b isoforms and the nicotinic acetylcholine receptor alpha2 promoter
Whether Brn3b is functionally required was answered by knockout, which revealed selective loss of most RGCs and established it as essential for RGC development.
Evidence Targeted gene disruption in mouse with histology
Mutagenesis pinpointed the molecular determinant of Brn3b's regulatory polarity, showing a single POU-homeodomain residue toggles it between activating and inhibitory.
Evidence Overexpression in ND7 neuronal cells with site-directed mutagenesis and reporter assay
Brn3b was shown to engage nuclear-receptor and tumor-suppressor partners, broadening its regulatory repertoire beyond simple octamer binding.
Evidence GST pulldown, yeast two-hybrid, reporter assays, and mutagenesis defining Brn3b–estrogen receptor interaction; BRCA-1 promoter repression assays
Knock-in fate mapping resolved that Brn3b acts after fate commitment, controlling differentiation and axon formation rather than RGC birth.
Evidence KO with lacZ/AP fate mapping, retinal explants, and ultrastructure
The axon defect was characterized at the polarity level, showing Brn3b-null neurites adopt dendritic rather than axonal identity.
Evidence Retinal explant culture with MAP-2/tau-1 immunostaining and electron microscopy in KO mice
Paralog compensation was tested, showing Brn3c can partially substitute for Brn3b in neurite outgrowth while retaining unique chiasm functions.
Evidence Double-knockout mice, explant rescue by forced Brn3c expression, and axon tracing
Upstream regulation was addressed with WT1 identified as an activator of Pou4f2 transcription.
Evidence Reporter assay with cis-element mutagenesis, immunofluorescence, and WT1-null retina analysis
Genome-wide profiling defined the Brn3b-dependent RGC transcriptome, moving from phenotype to molecular output.
Evidence Microarray of Brn3b-null retinas with qPCR and in situ validation
The transactivation architecture of Brn3b was mapped, localizing the activation function to the N-terminus and demonstrating direct, ChIP-confirmed control of HSP-27.
Evidence Gal4-DBD fusion truncation reporter assays; ChIP, siRNA, and mutagenesis at the HSP-27 promoter
A pro-apoptotic mechanism was defined through a Brn3b–p53 interaction that selectively enhances Bax transactivation.
Evidence Co-IP, reporter assay, mutagenesis, and KO mouse neurons
Direct downstream and upstream nodes were resolved: Eomes as a cis-regulated RGC differentiation target, cyclin D1 as a directly bound target, and Brm as a chromatin facilitator of Brn3b.
Evidence Conditional KO with cis-regulatory reporter analysis (Eomes); EMSA/ChIP/mutagenesis (cyclin D1); progenitor perturbation assays (Brm)
PMID:17637757 PMID:17855369 PMID:18077589
The core RGC gene regulatory network was assembled, placing Pou4f2 and Isl1 as intersecting branches downstream of Math5 that form a synergistic complex and repress non-RGC fates.
Evidence Co-IP, ChIP, transactivation assays, conditional and double-null epistasis, microarray, and gain-of-function misexpression across three studies
PMID:18367606 PMID:18434421 PMID:18460603
The fate-biasing mechanism was refined, showing Brn3b binds and represses DLX1 to steer precursors toward RGC over amacrine fate.
Evidence Co-IP, retroviral misexpression, and KO analysis
The Isl1–Brn3b complex was dissected biochemically, mapping interacting domains and showing quantitative contributions to RGC gene expression.
Evidence GST pulldown, co-IP, EMSA, luciferase, and RNA-seq
Sufficiency was established: ectopic Pou4f2 plus Isl1 specifies functional RGCs in the Atoh7-null retina, defining a minimal regulatory core.
Evidence Binary knockin-transgenic ectopic expression with gene expression analysis and electrophysiology
Functional conservation and additional upstream input were shown by sea-urchin orthologue rescue and FEZF2 activation of Brn3b.
Evidence Genomic replacement with SpPou4f1/2 plus ERG; FEZF2 KO, electroporation, and reporter assay
DLX1/2 were placed as direct upstream activators of Brn3b, with triple-KO epistasis revealing cooperative network architecture.
Evidence Triple-KO, in utero electroporation gain-of-function, and primary culture knockdown
Non-retinal roles emerged with Brn3b required for cardiac adaptive hypertrophy through MAPK/calcineurin induction and staged activation of cyclin D1, GLUT4, and Bax.
Evidence KO mouse, primary cardiomyocyte culture, reporter assays, and echocardiography
PMID:25356872 PMID:26670484 PMID:31413277
Additional systemic roles were defined in vascular smooth muscle Ca2+/ECM regulation and in midbrain fear circuitry via Tac2.
Evidence KO with RNA-seq, contractility and Ca2+ imaging (aorta); midbrain conditional KO with behavioral and Tac2 rescue (fear circuit)
Further roles in spermatogenesis and standalone sufficiency for projection-neuron identity in late retinal progenitors were demonstrated.
Evidence KO with RNA-seq and ultrastructure (spermatogenesis, preprint); in vivo ectopic overexpression with axon tracing (late RPCs)
| Year | Finding | Method | Journal | Conf | PMIDs |
|---|---|---|---|---|---|
| 1996 | Targeted disruption of Brn3b in mice leads to selective loss of ~70% of retinal ganglion cells, demonstrating that Brn3b is required for the development of a large set of RGCs. | Targeted gene disruption (knockout mouse), histology | Proceedings of the National Academy of Sciences of the United States of America | High | 8632990 |
| 1993 | Brn3b (POU4F2) is a class IV POU domain transcription factor expressed exclusively within a subpopulation of retinal ganglion cells, and also in deep layers of the superior colliculus and dorsal periaqueductal gray, as shown by immunohistochemistry across multiple species. | Immunohistochemistry, cDNA cloning | Neuron | High | 7691107 |
| 1999 | Brn3b is not required for initial RGC fate commitment or migration to the ganglion cell layer, but is essential for RGC differentiation; without it, cells undergo apoptosis and extend dendrite-like processes instead of axons, suggesting Brn3b regulates genes required for axon formation. | Targeted gene disruption (knockout mouse), lacZ/alkaline phosphatase knock-in fate mapping, retinal explant culture, ultrastructural analysis | Developmental biology | High | 10357904 |
| 2008 | ISL1 and BRN3B are co-expressed in nascent post-mitotic RGCs and form a complex that synergistically regulates a common set of RGC-specific target genes; whole-retina ChIP and in vitro transactivation assays show concurrent binding and synergistic transcriptional activation. | Co-immunoprecipitation, chromatin immunoprecipitation (ChIP), in vitro transactivation assay, double-null mouse genetic epistasis | Development (Cambridge, England) | High | 18434421 |
| 2008 | Microarray analysis and genetic epistasis show that Pou4f2 and Isl1 define two distinct but intersecting branches of the RGC gene regulatory network downstream of Math5, with Isl1 also required for sustained Pou4f2 expression after Math5 levels diminish. | Conditional knockout mouse, microarray gene expression profiling, genetic epistasis | Proceedings of the National Academy of Sciences of the United States of America | High | 18460603 |
| 2008 | Loss of Brn3b function causes misspecification of RGC precursors into late-born RGC, amacrine, and horizontal cells, while ectopic Brn3b suppresses non-RGC fates and promotes RGC fate; Brn3b represses a network of retinogenic factor genes in RGC precursors. | Knockout mouse, gain-of-function misexpression, microarray profiling, in situ hybridization | The Journal of neuroscience | High | 18367606 |
| 2004 | Microarray analysis of Brn3b-null embryonic retinas identifies 87 Brn3b-dependent genes, including transcription factors, neuron integrity/function proteins, and secreted signaling molecules (e.g., sonic hedgehog, myostatin/Gdf8), establishing a Brn3b-dependent transcriptome in RGCs. | Knockout mouse, microarray hybridization (18,816-element retina cDNA array), real-time PCR, in situ hybridization | Development (Cambridge, England) | High | 14973295 |
| 2007 | Eomesodermin (Eomes) is a direct target gene of Pou4f2; Pou4f2 regulates Eomes expression through a cis-regulatory element within a conserved retinal enhancer, and Eomes deletion causes RGC differentiation defects and impaired optic nerve myelination similar to Pou4f2-null retinas. | Conditional knockout mouse, reporter assay (cis-regulatory element analysis), genetic epistasis | Development (Cambridge, England) | High | 18077589 |
| 2015 | Ectopic co-expression of Pou4f2 and Isl1 in the Atoh7-null retina is sufficient to specify the RGC fate, produce largely normal RGCs that survive to postnatal stages and are physiologically functional, demonstrating that these two factors compose a minimally sufficient regulatory core for RGC fate. | Binary knockin-transgenic system (ectopic expression in Atoh7-null background), gene expression analysis, electrophysiology | Proceedings of the National Academy of Sciences of the United States of America | High | 25775587 |
| 2014 | Isl1 and Pou4f2 form a direct protein complex in vitro and in vivo; GST pulldown, co-immunoprecipitation, and EMSA identify interacting domains; luciferase and RNA-seq demonstrate that both factors contribute quantitatively to RGC gene expression and that Pou4f2 can interact with other POU factors while Isl1 interacts with other LIM-HD factors. | GST pulldown, co-immunoprecipitation, electrophoretic mobility shift assay (EMSA), luciferase reporter assay, RNA-seq | PloS one | High | 24643061 |
| 2000 | Brn3b-deficient RGCs fail to polarize correctly; retinal explants show shorter, non-fasciculated neurites that accumulate microtubules and neurofilaments characteristic of dendrites (MAP-2+) rather than axons, while tau-1 accumulates in cell bodies, indicating a defect in axon transport and polarity establishment downstream of Brn3b. | Retinal explant culture, immunostaining (MAP-2, tau-1), electron microscopy, KO mouse | Molecular and cellular neurosciences | High | 10924257 |
| 2002 | Genetic analysis of Brn3b/Brn3c double-knockout mice reveals that Brn3c partially compensates for Brn3b loss; forced expression of Brn3c in Brn3b-null retinal explants restores neurite outgrowth; Brn3c uniquely controls ipsilateral axon production at the optic chiasm. | Double-knockout mouse, retinal explant rescue by forced Brn3c expression, axon tracing | Development (Cambridge, England) | High | 11807038 |
| 1998 | Brn3b and Brn3a interact with the estrogen receptor (ER) independently of ligand binding; the POU domain of each factor interacts with the ER DNA-binding domain as shown by pulldown and yeast two-hybrid; Brn3b strongly activates an ERE-containing promoter in estradiol-stimulated cells while Brn3a mildly inhibits it; a single amino acid difference in the POU homeodomain helix 1 determines this functional divergence. | GST pulldown assay, yeast two-hybrid, co-transfection reporter assay, site-directed mutagenesis | Molecular and cellular biology | High | 9448000 |
| 1999 | Brn3b strongly represses the BRCA-1 promoter approximately 20-fold in mammary tumour cells, while Brn3a does not; this correlates with elevated Brn3b expression in tumours with reduced BRCA-1 levels. | Co-transfection reporter assay, immunohistochemistry, Western blot | Oncogene | Medium | 10597274 |
| 2005 | Brn3b directly transactivates the HSP-27 promoter and cooperates with the estrogen receptor to achieve maximal stimulation; ChIP confirms Brn3b association with the HSP-27 promoter in intact cells; siRNA knockdown and site-directed mutagenesis of the Brn3b binding site reduce transactivation. | Co-transfection reporter assay, chromatin immunoprecipitation (ChIP), RNA interference (siRNA), site-directed mutagenesis | Cancer research | High | 15833836 |
| 2006 | Brn3b physically interacts with p53 and, unlike Brn3a, co-expression of Brn3b with p53 increases Bax promoter transactivation but not p21cip1/waf1, resulting in enhanced apoptosis; neurons from Brn3b-KO mice show reduced Bax expression upon p53 induction and are resistant to apoptosis. | Co-immunoprecipitation, co-transfection reporter assay, site-directed mutagenesis, KO mouse neurons | Nucleic acids research | High | 17145718 |
| 2007 | Brn3b directly transactivates the cyclin D1 (CD1) promoter; EMSA and ChIP demonstrate Brn3b protein binding to an octamer sequence in the proximal CD1 promoter; site-directed mutagenesis of this sequence abolishes transactivation. | Co-transfection reporter assay, EMSA, chromatin immunoprecipitation (ChIP), site-directed mutagenesis | Oncogene | High | 17637757 |
| 2003 | WT1 (Wilms' tumor gene product) is a transcriptional activator of Pou4f2; WT1 activates the Pou4f2 promoter ~4-fold through a WT1-binding consensus element; Pou4f2 immunoreactivity is absent in retinas of Wt1-null embryos; both proteins co-localize in glomerular podocytes and developing RGCs. | Co-transfection reporter assay, site-directed mutagenesis of cis-element, immunofluorescence, WT1-knockout mouse | Gene | Medium | 12609742 |
| 1995 | The neuronal nicotinic acetylcholine receptor alpha 2 subunit gene promoter (containing multiple CCCCATGCAAT octamer-related sequences) is specifically activated by Brn3b but not by Brn3a or Brn3c; this activation requires both the POU domain and N-terminal sequences of Brn3b and depends on the full regulatory context (truncated derivatives are not activated by Brn3b). | Co-transfection reporter assay with truncation mutants | The Journal of biological chemistry | Medium | 7797498 |
| 1997 | Overexpression of Brn3b in ND7 neuronal cells inhibits neurite process outgrowth and synaptic vesicle gene expression following differentiation stimulus; a single amino acid change in the Brn3b POU homeodomain to its Brn3a equivalent converts Brn3b from inhibitory to activating, demonstrating that this residue determines functional polarity. | Overexpression in neuronal cell line (ND7), site-directed mutagenesis, morphological analysis, reporter assay | The Journal of biological chemistry | Medium | 8995448 |
| 1995 | The short isoform of Brn3b (Brn3b(s)) forms a heterodimer with Brn3a(l) that is inactive for DNA binding; Brn3b(s) inhibits Brn3a(l) binding to octamer-related DNA sequences and disrupts preformed Brn3a-DNA complexes via direct protein-protein interaction in solution as shown by GST fusion protein binding studies. | GST fusion protein pulldown, electrophoretic mobility shift assay (EMSA), co-transfection reporter assay | The Journal of biological chemistry | High | 8537352 |
| 2005 | A strong transcriptional activation domain in Brn3b/POU4f2 maps to the N-terminal region (approximately amino acids 100–239); the C-terminal POU domain does not have transactivation activity and causes fortuitous transrepression at high expression; full-length Brn3b increases transcription >25-fold at Brn3 DNA-binding sites. | Co-transfection reporter assay with Gal4-DBD fusion truncation/deletion constructs, site-directed mutagenesis | Differentiation; research in biological diversity | Medium | 15733064 |
| 1999 | Brn3b activates the quail Pax-6 intragenic neuroretina-specific enhancer (EP enhancer) in neuroretina cells but not in other cell types, while closely related Brn3a and Brn3c do not activate it, identifying Pax-6 as a downstream effector of Brn3b in the retina. | Co-transfection reporter assay | Journal of neurobiology | Low | 10526314 |
| 2009 | Deletion of Brn3b leads to RGC transdifferentiation and loss, axon defects in the eye and brain, and defects in central projections that differentially compromise visually driven behaviors; conditional alleles with individual cell visualization reveal Brn3b controls dendritic stratification and projection patterns in RGC subtypes. | Conditional knockout mouse (Cre-lox), sparse cell labeling for morphological analysis, behavioral testing | Neuron | High | 19323995 |
| 2017 | DLX1 and DLX2 function as direct transcriptional activators of Brn3b expression upstream of Brn3b; Dlx2 gain-of-function in utero is sufficient for Brn3b expression in vivo; Dlx1/Dlx2/Brn3b triple-KO causes near total RGC loss worse than any single or double mutant, demonstrating cooperative pathway placement. | Triple-knockout mouse, in utero electroporation gain-of-function, primary retinal culture Dlx2 knockdown, genetic epistasis | Development (Cambridge, England) | High | 28356311 |
| 2011 | Brn3b interacts with DLX1 through its homeodomain, repressing DLX1 transcriptional activity; this interaction biases multipotent precursors toward RGC fates and away from amacrine cell fates; combined ectopic expression of Brn3b with DLX1/2 promotes RGC production while inhibiting amacrine differentiation. | Co-immunoprecipitation, retroviral misexpression in retina, KO mouse analysis | Neuroscience | Medium | 21875655 |
| 2016 | Substituting mouse Pou4f2 with a sea urchin orthologue (SpPou4f1/2) by genomic replacement restores RGC development in Pou4f2-null mice, including activation of RGC-specific genes and functionally active RGCs, demonstrating conserved intrinsic transcriptional function of the Pou4f domain. | Genomic replacement (knock-in of sea urchin cDNA into Pou4f2 locus), electroretinography, gene expression analysis | Proceedings. Biological sciences | High | 26962139 |
| 2007 | The SWI/SNF chromatin remodeling ATPase Brm promotes RGC differentiation by facilitating Brn3b expression and function, and by inhibiting Notch signaling; Brm also promotes cell cycle exit during RGC differentiation. | Perturbation of expression/function assays in retinal progenitors, reporter assay | The Journal of biological chemistry | Medium | 17855369 |
| 2015 | Loss of Brn3b in KO mice causes profound hyperglycemia and insulin resistance; Brn3b directly transactivates the GLUT4 promoter (confirmed by co-transfection and ChIP), and GLUT4 is reduced in skeletal muscle of KO mice; Brn3b expression is induced by glucose but inhibited by insulin in C2C12 myocytes. | Knockout mouse, co-transfection reporter assay, chromatin immunoprecipitation (ChIP), glucose/insulin treatment of C2C12 cells | American journal of physiology. Endocrinology and metabolism | High | 26670484 |
| 2019 | Brn3b (POU4F2) is required for adaptive hypertrophic response to angiotensin II in the heart; Brn3b is induced in cardiomyocytes by AngII via MAPK/ERK1/2 and calcineurin/NFAT pathways; male Brn3b KO mice show baseline contractile dysfunction and attenuated hypertrophic response to AngII with extensive fibrosis; Brn3b target genes cyclin D1, GLUT4, and Bax are induced at different stages of the response. | Knockout mouse, primary cardiomyocyte culture, reporter assay for promoter activation, echocardiography | Cell death & disease | Medium | 31413277 |
| 2017 | Brn3a directly represses the Brn3b promoter in cardiomyocytes; Brn3a KO hearts show increased Brn3b mRNA linked to elevated cyclin D1 and hyperplastic growth; Brn3b then cooperates with p53 to enhance Bax transcription during late gestation causing apoptotic defects; double-KO causes early embryonic lethality. | Knockout mouse (single and double KO), reporter assay, morpholino knockdown in zebrafish | Cell death & disease | Medium | 28594399 |
| 2014 | Co-expression of Brn3b with p53 in cardiomyocytes following ischaemia/hypoxia correlates with upregulation of pro-apoptotic genes Bax, Noxa, and PUMA; targeted shRNA reduction of Brn3b reduces Bax and Noxa protein even when p53 remains intact, demonstrating Brn3b is required for p53-mediated pro-apoptotic gene expression in injured cardiomyocytes. | shRNA knockdown, immunostaining in mouse infarct model, simulated ischaemia/reoxygenation in NRVM | Cell death & disease | Medium | 25356872 |
| 2023 | Loss of Brn3b in aortic vascular smooth muscle cells (VSMCs) causes extensive ECM remodelling, elastin fibre disruption, and attenuated vascular contractility; RNA-seq of KO aortas identifies deregulation of Ca2+ signalling genes (increased Cacna1d, RyR2, PLN; reduced ATP2a1/SERCA1), confirmed by abnormal Ca2+ signalling in KO-derived VSMCs after ATP stimulation. | Knockout mouse, RNA sequencing, immunostaining, vascular ring contractility assay, Ca2+ imaging in VSMCs | Cell death & disease | Medium | 38007517 |
| 2016 | Transient expression of FEZF2 in developing retina at E16.5 modulates Brn3b transcription; FEZF2 binds to a 5' regulatory fragment in the Brn3b genomic locus (confirmed by reporter assay) and increases Brn3b mRNA; Fezf2 knockout reduces BRN3B+ cells selectively (not ISL1 or BRN3A), identifying FEZF2 as an upstream transcriptional activator of Brn3b. | Knockout mouse, in utero electroporation (knockdown), reporter assay with genomic regulatory fragment, in situ hybridization | The Journal of biological chemistry | Medium | 26861874 |
| 2023 | Midbrain-specific deletion of Brn3b causes loss of neurons projecting to the lateral posterior thalamic nucleus and down-regulates neuropeptide tachykinin 2 (Tac2) expression; Tac2 overexpression ameliorates the impaired defensive freezing response to visual threat in Brn3b mutants, placing Tac2 genetically downstream of Brn3b in regulating fear-related midbrain visual circuits. | Conditional knockout mouse (midbrain-specific), behavioral assay (defensive freezing), Tac2 overexpression rescue, neuroanatomical tracing | PLoS biology | Medium | 37983249 |
| 2021 | POU4F2 promotes colorectal cancer cell migration and invasion through activation of the Hedgehog signaling pathway (SHH, PTCH1, SMO, GLI1); knockdown reduces EMT marker expression and lung metastases in nude mice; SMO agonist SAG reverses POU4F2 knockdown effects, placing POU4F2 upstream of Hedgehog/EMT axis. | siRNA knockdown, overexpression, in vivo xenograft/metastasis model, Western blot, RT-PCR, SMO agonist rescue | Cancer science | Medium | 34327778 |
| 1999 | Brn3b activates the herpes simplex virus (HSV) IE1 promoter (at TAATGARAT motifs) and activates the full-length VZV immediate-early promoter in sensory ganglion cells; in contrast to Brn3a which activates HSV IE1, Brn3b represses it; both factors activate VZV IE promoter, but through different mechanisms as the Brn3b response to VZV requires the full-length promoter context and not individual TAATGARAT elements. | Co-transfection reporter assay with promoter truncation constructs | The international journal of biochemistry & cell biology | Low | 10224669 |
| 2025 | Brn3b (POU4F2) is essential for spermatogenesis; constitutive male Brn3b-KO mice are infertile with reduced sperm counts, impaired motility, disrupted acrosomes, and mitochondrial/flagellar defects; RNA-seq reveals Brn3b-dependent regulation of genes for sperm development, mitochondrial function, and microtubule-based movement. | Knockout mouse, RNA-seq, qRT-PCR, electron microscopy (ultrastructural analysis), sperm motility assay | Research square (preprint)preprint | Medium | 41282076 |
| 2025 | Overexpression of Pou4f2 alone in late retinal progenitor cells in vivo is sufficient to generate RGC-like cells that share morphological and transcriptional features with early-born RGCs and extend axonal projections to the brain, demonstrating Pou4f2 is sufficient to impose projection neuron identity on late progenitors. | In vivo ectopic overexpression in late RPCs, immunostaining, transcriptomic analysis, axon tracing | Development (Cambridge, England) | Medium | 39946314 |
| Year | Title | Journal | Citations | PMID |
|---|---|---|---|---|
| 1996 | POU domain factor Brn-3b is required for the development of a large set of retinal ganglion cells. | Proceedings of the National Academy of Sciences of the United States of America | 293 | 8632990 |
| 2009 | Distinct roles of transcription factors brn3a and brn3b in controlling the development, morphology, and function of retinal ganglion cells. | Neuron | 220 | 19323995 |
| 1993 | Brn-3b: a POU domain gene expressed in a subset of retinal ganglion cells. | Neuron | 193 | 7691107 |
| 1999 | POU domain factor Brn-3b is essential for retinal ganglion cell differentiation and survival but not for initial cell fate specification. | Developmental biology | 162 | 10357904 |
| 2008 | ISL1 and BRN3B co-regulate the differentiation of murine retinal ganglion cells. | Development (Cambridge, England) | 157 | 18434421 |
| 2008 | Gene regulation logic in retinal ganglion cell development: Isl1 defines a critical branch distinct from but overlapping with Pou4f2. | Proceedings of the National Academy of Sciences of the United States of America | 129 | 18460603 |
| 2002 | Brn3b/Brn3c double knockout mice reveal an unsuspected role for Brn3c in retinal ganglion cell axon outgrowth. | Development (Cambridge, England) | 117 | 11807038 |
| 1998 | Requirement for Brn-3b in early differentiation of postmitotic retinal ganglion cell precursors. | Developmental biology | 115 | 9630743 |
| 2004 | Discrete gene sets depend on POU domain transcription factor Brn3b/Brn-3.2/POU4f2 for their expression in the mouse embryonic retina. | Development (Cambridge, England) | 107 | 14973295 |
| 2012 | Diagnosis of bladder cancer recurrence based on urinary levels of EOMES, HOXA9, POU4F2, TWIST1, VIM, and ZNF154 hypermethylation. | PloS one | 97 | 23056278 |
| 2015 | Two transcription factors, Pou4f2 and Isl1, are sufficient to specify the retinal ganglion cell fate. | Proceedings of the National Academy of Sciences of the United States of America | 91 | 25775587 |
| 2010 | Morphologies of mouse retinal ganglion cells expressing transcription factors Brn3a, Brn3b, and Brn3c: analysis of wild type and mutant cells using genetically-directed sparse labeling. | Vision research | 79 | 20826176 |
| 2008 | A comprehensive negative regulatory program controlled by Brn3b to ensure ganglion cell specification from multipotential retinal precursors. | The Journal of neuroscience : the official journal of the Society for Neuroscience | 78 | 18367606 |
| 2007 | Eomesodermin, a target gene of Pou4f2, is required for retinal ganglion cell and optic nerve development in the mouse. | Development (Cambridge, England) | 69 | 18077589 |
| 2000 | Abnormal polarization and axon outgrowth in retinal ganglion cells lacking the POU-domain transcription factor Brn-3b. | Molecular and cellular neurosciences | 69 | 10924257 |
| 2008 | Near complete loss of retinal ganglion cells in the math5/brn3b double knockout elicits severe reductions of other cell types during retinal development. | Developmental biology | 65 | 18321480 |
| 1999 | The Brn-3b POU family transcription factor represses expression of the BRCA-1 anti-oncogene in breast cancer cells. | Oncogene | 60 | 10597274 |
| 1998 | POU transcription factors Brn-3a and Brn-3b interact with the estrogen receptor and differentially regulate transcriptional activity via an estrogen response element. | Molecular and cellular biology | 54 | 9448000 |
| 2018 | HOXA9, PCDH17, POU4F2, and ONECUT2 as a Urinary Biomarker Combination for the Detection of Bladder Cancer in Chinese Patients with Hematuria. | European urology focus | 45 | 30309818 |
| 2016 | An epigenetic biomarker combination of PCDH17 and POU4F2 detects bladder cancer accurately by methylation analyses of urine sediment DNA in Han Chinese. | Oncotarget | 45 | 26700620 |
| 2005 | Expression of the Brn-3b transcription factor correlates with expression of HSP-27 in breast cancer biopsies and is required for maximal activation of the HSP-27 promoter. | Cancer research | 40 | 15833836 |
| 2007 | SWI/SNF chromatin remodeling ATPase Brm regulates the differentiation of early retinal stem cells/progenitors by influencing Brn3b expression and Notch signaling. | The Journal of biological chemistry | 37 | 17855369 |
| 2014 | Isl1 and Pou4f2 form a complex to regulate target genes in developing retinal ganglion cells. | PloS one | 36 | 24643061 |
| 2005 | Axotomy-induced early down-regulation of POU-IV class transcription factors Brn-3a and Brn-3b in retinal ganglion cells. | Journal of molecular neuroscience : MN | 35 | 15968082 |
| 2015 | Neuroprotective effects of transcription factor Brn3b in an ocular hypertension rat model of glaucoma. | Investigative ophthalmology & visual science | 34 | 25587060 |
| 2014 | Comparative expression analysis of POU4F1, POU4F2 and ISL1 in developing mouse cochleovestibular ganglion neurons. | Gene expression patterns : GEP | 33 | 24709358 |
| 2006 | Brn-3b enhances the pro-apoptotic effects of p53 but not its induction of cell cycle arrest by cooperating in trans-activation of bax expression. | Nucleic acids research | 33 | 17145718 |
| 2004 | The Brn-3b transcription factor regulates the growth, behavior, and invasiveness of human neuroblastoma cells in vitro and in vivo. | The Journal of biological chemistry | 30 | 14970234 |
| 2001 | The closely related POU family transcription factors Brn-3a and Brn-3b are expressed in distinct cell types in the testis. | The international journal of biochemistry & cell biology | 30 | 11470235 |
| 2003 | The Wilms' tumor suppressor Wt1 encodes a transcriptional activator of the class IV POU-domain factor Pou4f2 (Brn-3b). | Gene | 29 | 12609742 |
| 1995 | The neuronal nicotinic acetylcholine receptor alpha 2 subunit gene promoter is activated by the Brn-3b POU family transcription factor and not by Brn-3a or Brn-3c. | The Journal of biological chemistry | 29 | 7797498 |
| 2021 | CRISPR Generated SIX6 and POU4F2 Reporters Allow Identification of Brain and Optic Transcriptional Differences in Human PSC-Derived Organoids. | Frontiers in cell and developmental biology | 28 | 34869356 |
| 2017 | Regulation of Brn3b by DLX1 and DLX2 is required for retinal ganglion cell differentiation in the vertebrate retina. | Development (Cambridge, England) | 28 | 28356311 |
| 2004 | Developmental expression of the POU domain transcription factor Brn-3b (Pou4f2) in the lateral line and visual system of zebrafish. | Developmental dynamics : an official publication of the American Association of Anatomists | 28 | 15042710 |
| 1996 | Alternative splicing of the Brn-3a and Brn-3b transcription factor RNAs is regulated in neuronal cells. | Journal of molecular neuroscience : MN | 28 | 8835784 |
| 2004 | Quantitative ex vivo detection of rodent retinal ganglion cells by immunolabeling Brn-3b. | Experimental eye research | 26 | 15183108 |
| 1997 | Inhibition of neuronal process outgrowth and neuronal specific gene activation by the Brn-3b transcription factor. | The Journal of biological chemistry | 26 | 8995448 |
| 2001 | The Brn-3b POU family transcription factor regulates the cellular growth, proliferation, and anchorage dependence of MCF7 human breast cancer cells. | Oncogene | 25 | 11526481 |
| 2016 | Bcl-2, Bcl-xL, and p-AKT are involved in neuroprotective effects of transcription factor Brn3b in an ocular hypertension rat model of glaucoma. | Molecular vision | 24 | 27587945 |
| 2011 | Structural correlation between the nerve fiber layer and retinal ganglion cell loss in mice with targeted disruption of the Brn3b gene. | Investigative ophthalmology & visual science | 23 | 21622702 |
| 2014 | Pou4f1 and pou4f2 are dispensable for the long-term survival of adult retinal ganglion cells in mice. | PloS one | 22 | 24736625 |
| 2009 | Epitope-tagging Math5 and Pou4f2: new tools to study retinal ganglion cell development in the mouse. | Developmental dynamics : an official publication of the American Association of Anatomists | 22 | 19459208 |
| 2014 | Developmental wave of Brn3b expression leading to RGC fate specification is synergistically maintained by miR-23a and miR-374. | Developmental neurobiology | 19 | 24838392 |
| 2014 | Co-expression of POU4F2/Brn-3b with p53 may be important for controlling expression of pro-apoptotic genes in cardiomyocytes following ischaemic/hypoxic insults. | Cell death & disease | 19 | 25356872 |
| 2007 | Proliferation-associated Brn-3b transcription factor can activate cyclin D1 expression in neuroblastoma and breast cancer cells. | Oncogene | 19 | 17637757 |
| 2011 | Hsp-27 induction requires POU4F2/Brn-3b TF in doxorubicin-treated breast cancer cells, whereas phosphorylation alters its cellular localisation following drug treatment. | Cell stress & chaperones | 16 | 21279488 |
| 1998 | NT-3 regulates expression of Brn3a but not Brn3b in developing mouse trigeminal sensory neurons. | Brain research. Molecular brain research | 16 | 9582431 |
| 1995 | The levels of the antagonistic POU family transcription factors Brn-3a and Brn-3b in neuronal cells are regulated in opposite directions by serum growth factors. | Neuroscience letters | 16 | 7731552 |
| 1995 | Short isoform of POU factor Brn-3b can form a heterodimer with Brn-3a that is inactive for octamer motif binding. | The Journal of biological chemistry | 16 | 8537352 |
| 1996 | Similarities and differences among inner retinal neurons revealed by the expression of reporter transgenes controlled by Brn-3a, Brn-3b, and Brn-3c promotor sequences. | Visual neuroscience | 15 | 8903036 |
| 2021 | Transcription factor POU4F2 promotes colorectal cancer cell migration and invasion through hedgehog-mediated epithelial-mesenchymal transition. | Cancer science | 14 | 34327778 |
| 2016 | Brn3a and Brn3b knockout mice display unvaried retinal fine structure despite major morphological and numerical alterations of ganglion cells. | The Journal of comparative neurology | 14 | 27391320 |
| 2015 | Dynamic expression of transcription factor Brn3b during mouse cranial nerve development. | The Journal of comparative neurology | 14 | 26356988 |
| 2011 | Proliferation-associated POU4F2/Brn-3b transcription factor expression is regulated by oestrogen through ERα and growth factors via MAPK pathway. | Breast cancer research : BCR | 14 | 21241485 |
| 1996 | The functionally antagonistic POU family transcription factors Brn-3a and Brn-3b show opposite changes in expression during the growth arrest and differentiation of human neuroblastoma cells. | International journal of cancer | 13 | 8782654 |
| 2017 | Essential but partially redundant roles for POU4F1/Brn-3a and POU4F2/Brn-3b transcription factors in the developing heart. | Cell death & disease | 12 | 28594399 |
| 2019 | The POU4F2/Brn-3b transcription factor is required for the hypertrophic response to angiotensin II in the heart. | Cell death & disease | 11 | 31413277 |
| 2016 | Pou4f2 knock-in Cre mouse: A multifaceted genetic tool for vision researchers. | Molecular vision | 10 | 27390513 |
| 2011 | Brn-3b inhibits generation of amacrine cells by binding to and negatively regulating DLX1/2 in developing retina. | Neuroscience | 10 | 21875655 |
| 2021 | Linking metabolic dysfunction with cardiovascular diseases: Brn-3b/POU4F2 transcription factor in cardiometabolic tissues in health and disease. | Cell death & disease | 9 | 33712567 |
| 2019 | A Novel Reporter Mouse Uncovers Endogenous Brn3b Expression. | International journal of molecular sciences | 9 | 31197108 |
| 2015 | Profound hyperglycemia in knockout mutant mice identifies novel function for POU4F2/Brn-3b in regulating metabolic processes. | American journal of physiology. Endocrinology and metabolism | 9 | 26670484 |
| 2010 | Cell-specific regulation of the pro-survival Brn-3b transcription factor by microRNAs. | Molecular and cellular neurosciences | 9 | 20609388 |
| 1999 | Evidence that POU factor Brn-3B regulates expression of Pax-6 in neuroretina cells. | Journal of neurobiology | 9 | 10526314 |
| 2005 | Elevated expression of the Brn-3a and Brn-3b transcription factors in systemic lupus erythematosus correlates with antibodies to Brn-3 and overexpression of Hsp90. | Arthritis and rheumatism | 8 | 15818685 |
| 2004 | Doppel expression is regulated by the Brn-3a and Brn-3b transcription factors. | Neuroreport | 8 | 15094508 |
| 2020 | nGnG Amacrine Cells and Brn3b-negative M1 ipRGCs are Specifically Labeled in the ChAT-ChR2-EYFP Mouse. | Investigative ophthalmology & visual science | 7 | 32049344 |
| 2016 | Substituting mouse transcription factor Pou4f2 with a sea urchin orthologue restores retinal ganglion cell development. | Proceedings. Biological sciences | 6 | 26962139 |
| 2005 | Identification of an N-terminal transcriptional activation domain within Brn3b/POU4f2. | Differentiation; research in biological diversity | 6 | 15733064 |
| 2018 | POU4F2/Brn-3b transcription factor is associated with survival and drug resistance in human ovarian cancer cells. | Oncotarget | 5 | 30613365 |
| 1997 | Regulation of neuroblastoma growth and differentiation by the POU family transcription factors Brn-3a and Brn-3b (Review). | International journal of oncology | 5 | 21533495 |
| 2016 | Pou4f2-GFP knock-in mouse line: A model for studying retinal ganglion cell development. | Genesis (New York, N.Y. : 2000) | 4 | 27532212 |
| 2003 | Sensory neurons from mice lacking the Brn-3b POU family transcription factor are resistant to death-inducing stimuli both in vitro and in vivo. | Brain research. Molecular brain research | 4 | 14559155 |
| 2024 | Intervention of epithelial mesenchymal transition against colon cancer cell growth and metastasis based on SOX21/POU4F2/Hedgehog signaling axis. | Life sciences | 3 | 38992573 |
| 2023 | Vascular dysfunction caused by loss of Brn-3b/POU4F2 transcription factor in aortic vascular smooth muscle cells is linked to deregulation of calcium signalling pathways. | Cell death & disease | 3 | 38007517 |
| 2016 | Promotion on the differentiation of retinal Müller cells into retinal ganglion cells by Brn-3b. | International journal of ophthalmology | 3 | 27500099 |
| 2023 | Brn3b regulates the formation of fear-related midbrain circuits and defensive responses to visual threat. | PLoS biology | 2 | 37983249 |
| 2020 | No association between POU4F1, POU4F2, ISL1 polymorphisms and normal-tension glaucoma. | Ophthalmic genetics | 2 | 32597291 |
| 2015 | Transcription Factor Brn-3b Overexpression Enhances Neurite Outgrowth in PC12 Cells Under Condition of Hypoxia. | Cellular and molecular neurobiology | 2 | 25786379 |
| 2025 | POU4F2 overexpression promotes the genesis of retinal ganglion cell-like projection neurons from late progenitors. | Development (Cambridge, England) | 1 | 39946314 |
| 2024 | Environmental Light Controls the Daily Organization of Breathing by Activating Brn3b-expressing Intrinsically Photosensitive Retinal Ganglion Cells in Mice. | Journal of biological rhythms | 1 | 39264015 |
| 2016 | Transient Expression of Fez Family Zinc Finger 2 Protein Regulates the Brn3b Gene in Developing Retinal Ganglion Cells. | The Journal of biological chemistry | 1 | 26861874 |
| 2026 | Methylation and Expression Analysis of POU4F2, HOXA9, RBM46, and TSGA10 Genes in Bladder Cancer Using Methyl-Sensitive Restriction Enzyme PCR (MSRE-PCR). | Cancer management and research | 0 | 41836594 |
| 2025 | The diagnostic performance of a noninvasive urine-based methylation biomarkers Vimentin/POU4F2 to detect bladder carcinoma. | BMC cancer | 0 | 41029537 |
| 2025 | Jiedu Sangen Decoction inhibits Epithelial-mesenchymal transition of colon adenocarcinoma via POU4F2/Hedgehog pathway. | Journal of ethnopharmacology | 0 | 41106566 |
| 2025 | POU4F2/Brn-3b is Essential for Spermatogenesis and its Disruption is Linked to Male Infertility in Mice and Humans. | Research square | 0 | 41282076 |
| 1999 | Distinct responses of the herpes simplex virus and varicella zoster virus immediate early promoters to the cellular transcription factors Brn-3a and Brn-3b. | The international journal of biochemistry & cell biology | 0 | 10224669 |
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