| 1991 |
HNF1B (vHNF1/LFB3) forms heterodimers with HNF1 (HNF1α) both in vitro and in nuclear extracts of kidney, liver, and cell lines; it also transactivates the albumin promoter in transfection experiments, establishing it as a transcriptional activator. |
In vitro heterodimerization assay, nuclear extract biochemical characterization, transfection/transactivation assay |
The EMBO journal |
High |
1673925 1673926
|
| 1991 |
LFB3/HNF1B binds DNA as a dimer and forms heterodimers with LFB1 (HNF1α) both in vitro and in vivo; it acts as a transcriptional activator. |
DNA binding assays, in vitro and in vivo heterodimerization, transcriptional activation assay |
The EMBO journal |
High |
1673925
|
| 1996 |
The vHNF1 promoter is transactivated by orphan receptors COUP-TF1/Ear3 and COUP-TFII/Arp1 via an indirect mechanism involving an interaction between COUP-TFI/Ear3 and octamer-binding proteins; a proximal octamer site (not the DR-1 site) is required for this transactivation. HNF4 has virtually no effect on the vHNF1 promoter, unlike the HNF1α promoter. |
Promoter deletion analysis, DNA-protein interaction (gel shift/footprinting), transfection/transactivation assays, mammalian two-hybrid interaction assay |
Molecular and cellular biology |
High |
8622679
|
| 1997 |
HNF1B (vHNF1) protein exists in vivo as two isoforms of ~65 and ~68 kDa, revealing differential post-translational modification compared to HNF1α, which appears as a heterogeneous mixture of 92–98 kDa polypeptides (higher than predicted from sequence). |
Polyclonal and monoclonal antibody characterization of liver and kidney extracts (western blot/immunoprecipitation) |
Biochimie |
Medium |
9523012
|
| 1998 |
LFB3/HNF1B binds to the C domain of a cAMP-responsive enhancer of the urokinase-type plasminogen activator gene in LLC-PK1 kidney cells and cooperates with CREB/ATF1 proteins to mediate cAMP induction; the region of LFB3 between amino acids 400–450 mediates interaction with CREB/ATF1, and deletion of this region abolishes cAMP induction but not basal transactivation on the albumin promoter. |
Mutation analysis, transfection assay, mammalian two-hybrid system, domain deletion analysis |
Molecular and cellular biology |
High |
9671480
|
| 1999 |
Homozygous inactivation of vHNF1/HNF1B in mice results in embryonic lethality by day 7.5 with disorganized visceral endoderm; vHNF1 expression is essential for visceral endoderm differentiation and is part of a genetic network directing HNF4 and downstream endodermal gene expression. The lethal phenotype is cell-autonomous to the visceral endoderm. |
Homologous recombination knockout mouse, ES cell differentiation, tetraploid morula aggregation (complementation), in situ hybridization of marker genes |
Development (Cambridge, England) |
High |
10518495
|
| 2001 |
In zebrafish, vhnf1 loss-of-function causes kidney cysts, underdevelopment of pancreas and liver, and otic vesicle defects by disrupting regional patterning; vhnf1 directly regulates expression of pdx1 and shh in gut endoderm, pax2 and wt1 in pronephric primordia, and valentino (val) in hindbrain. Overexpression of vhnf1 expands the val expression domain, demonstrating direct epistatic control. |
Insertional mutagenesis screen (zebrafish), mRNA overexpression, in situ hybridization of target genes, genetic epistasis |
Genes & development |
High |
11731484
|
| 2002 |
Hepatocyte/bile-duct-specific deletion of HNF1B in mice causes failure of intrahepatic bile duct morphogenesis, gallbladder abnormalities, and loss of hepatocyte-specific target genes involved in bile acid sensing and fatty acid oxidation, establishing an essential role of HNF1B in bile system morphogenesis and hepatocyte metabolic gene regulation. |
Cre/loxP conditional knockout (hepatocyte/bile duct-specific), histology, gene expression analysis |
Development (Cambridge, England) |
High |
11934849
|
| 2003 |
vHNF1/HNF1B directly binds the Kreisler (MafB/val) regulatory element S5 in rhombomere 5/6, and this binding site is essential (but not sufficient) for r5/r6-specific Kreisler expression in early embryos; vHNF1 acts with additional transcription factors to initiate Kreisler expression, establishing direct transcriptional control of hindbrain segmentation. |
Transgenic reporter (S5 regulatory element), site-directed mutagenesis of vHNF1-binding site, evolutionary sequence conservation analysis |
Mechanisms of development |
Medium |
16274963
|
| 2003 |
vHNF1 (zebrafish) promotes r5+r6 identity through obligate synergy with FGF signals to activate valentino and krox20, and independently represses hoxb1a expression; these are two functionally separable activities of vhnf1 in subdividing the caudal hindbrain. |
Zebrafish genetic analysis, FGF pathway inhibition, in situ hybridization, epistasis experiments |
Development (Cambridge, England) |
High |
12835397
|
| 2003 |
In embryonic pancreas, Hnf1beta+ cells (ductal cells) are the immediate precursors of Ngn3+ endocrine precursor cells; Hnf1beta expression is markedly reduced in early pancreatic epithelium of Hnf6-deficient mice (in which Ngn3+ cell formation is defective), placing Hnf1b downstream of Hnf6 in a genetic hierarchy controlling endocrine cell generation. |
Immunohistochemistry, genetic epistasis (Hnf6 KO mice), co-localization/lineage analysis |
Human molecular genetics |
Medium |
14570708
|
| 2004 |
HNF1B/TCF2 mutations causing MODY5 impair transactivation through two distinct mechanisms: (1) loss of DNA-binding capacity, or (2) retention of DNA binding but loss of association with histone acetyltransferases CBP and PCAF. Wild-type HNF1β transactivation depends on synergistic action of CBP and PCAF; truncation mutations causing defective nuclear localization show weak dominant-negative activity; the C-terminal QSP-rich domain is required for full transactivation. |
In vitro mutagenesis, transfection/reporter assay, co-immunoprecipitation with CBP/PCAF, nuclear localization studies, HDAC inhibitor (TSA) treatment |
Human molecular genetics |
High |
15509593
|
| 2004 |
vHNF1/HNF1B integrates retinoic acid (RA) signals and FGF signals in hindbrain patterning: RA induces val expression via activation of vhnf1; FGF signals from r4 (through MAPK pathway) then cooperate with Vhnf1 to activate val and specify r5/r6. vhnf1 acts largely independently of val to repress r4 identity in the posterior hindbrain. |
Zebrafish genetic analysis, RA treatment, FGF pathway manipulation, MAPK pathway analysis, in situ hybridization, epistasis experiments |
Development (Cambridge, England) |
High |
15342476
|
| 2005 |
Tcf2/vHNF1 is essential for early pancreas development; Tcf2-null mice (rescued from early lethality by tetraploid aggregation) exhibit pancreas agenesis by E13.5. The dorsal bud rudiment that forms transiently expresses Ipf1 and Hlxb9 but lacks Ptf1a and endocrine precursor cells. Tcf2 also controls regional specification of gut (ectopic Shh, loss of Ihh/Ipf1 in posterior stomach/duodenum), establishing epistatic control of Ptf1a and gut patterning genes. |
Tetraploid embryo aggregation rescue of null embryos, in situ hybridization of key transcription factors, immunohistochemistry |
Proceedings of the National Academy of Sciences of the United States of America |
High |
15668393
|
| 2005 |
HNF1B directly regulates the Pkhd1 promoter in kidney; HNF1B mutant mice show decreased Pkhd1 expression and develop renal cysts, linking MODY5/HNF1B-associated cystic kidney disease to downregulation of the ARPKD gene PKHD1. |
Transgenic mice with kidney-specific mutant HNF1B, Cre/loxP kidney-specific deletion, promoter binding/ChIP for Pkhd1, gene expression analysis |
Kidney international |
High |
16221171
|
| 2005 |
HNF1β target genes identified in HEK293 kidney cells include DPP4, ACE2, and osteopontin (SPP1), which contain functional HNF1 binding sites in their promoters and are directly regulated; nine of 25 identified target genes are deregulated in ovarian clear cell carcinoma. |
Conditional HNF1B expression system (Flp recombinase, tetracycline-inducible), oligonucleotide microarray, promoter analysis for HNF1 binding sites |
Biochimica et biophysica acta |
Medium |
16297991
|
| 2006 |
In zebrafish, Bmp signaling is required for vhnf1 expression in endoderm (Bmp pathway activation expands, Bmp pathway loss reduces vhnf1); Fgf signaling regulates pancreas development through the vhnf1 pathway; vhnf1 acts downstream of RA, Bmp, and Fgf signals to regulate endocrine beta cell development. RA cannot rescue vhnf1 mutant insulin defects, but vhnf1 overexpression restores insulin expression blocked by RA receptor inhibition. |
Morpholino knockdown (chordin, alk8), FGF pathway inhibition, RA receptor inhibitor, mRNA overexpression rescue, in situ hybridization, genetic epistasis |
Developmental biology |
High |
17217944
|
| 2006 |
vHNF1/TCF2 (acting upstream) activates HNF6 expression through a functional HNF1-binding site in an intronic enhancer of Hnf6; this establishes a vHNF1→HNF6→Pdx1 sequential cascade controlling generation of pancreatic precursor cells in the endoderm. |
In vitro protein-DNA interaction, endoderm electroporation reporter assay, transgenesis, gene inactivation, Hnf6 KO mice, Tcf2 KO mice |
Diabetes |
High |
16380477
|
| 2007 |
HNF1β directly binds the SOCS3 promoter and represses SOCS3 transcription in kidney epithelial cells. In HNF1β knockout mice and cells expressing dominant-negative HNF1β, increased SOCS3 inhibits HGF-induced tubulogenesis by decreasing phosphorylation of ERK and STAT3. Knockdown of SOCS3 in dominant-negative HNF1β-expressing cells rescues tubulogenesis by restoring ERK and STAT3 phosphorylation. |
Genome-wide ChIP-chip (chromatin immunoprecipitation + microarray), mRNA microarray, HNF1β knockout mouse, dominant-negative HNF1β cell line, SOCS3 knockdown rescue, tubulogenesis assay |
Proceedings of the National Academy of Sciences of the United States of America |
High |
18077349
|
| 2007 |
A conserved 800-bp enhancer in intron 4 of vHnf1 recapitulates its neural expression pattern in transgenic mice; functional analysis identifies two essential motif types: a retinoic acid response element and two half T-MARE sites, demonstrating direct integration of RA signaling and MAF-related factor inputs into vHnf1 expression. MAFB, itself regulated by vHNF1, acts as a positive modulator of vHnf1 in r5/r6 (feedback loop). |
Transgenic enhancer reporter mice, site-directed mutagenesis of RARE and T-MARE sites |
Developmental biology |
High |
17669392
|
| 2008 |
HNF1β interacts physically with five novel protein partners (including E4F1 and ZFP36L1) identified by bacterial two-hybrid screen using the N-terminal region of HNF1B, with four confirmed by GST pull-down. ZFP36L1, predominantly cytoplasmic, can reduce HNF1β transactivation in a luciferase reporter system. E4F1 co-localizes with HNF1β in the nucleus. |
Bacterial two-hybrid screen, GST pull-down confirmation, luciferase reporter assay, co-localization by immunofluorescence, Xenopus overexpression for phenotypic validation |
Kidney international |
Medium |
18418350
|
| 2008 |
vHNF1 (HNF1B) is required cell-autonomously for hepatic specification; loss of vHnf1 in mouse ventral endoderm blocks thickening, expression of hepatic genes, and responsiveness to inductive FGF signals in vitro. In zebrafish, the same conserved role is confirmed, establishing vHNF1 as required for endoderm competence and hepatic specification. |
Tetraploid complementation (vHnf1 KO mouse), in vitro culture of mutant ventral endoderm with FGF, zebrafish knockdown, in situ hybridization of hepatic specification markers (albumin, transthyretin) |
Development (Cambridge, England) |
High |
18635606
|
| 2009 |
HNF1B directly transactivates the FXYD2 promoter (shown by luciferase reporter assay), and HNF1B mutations associate with hypomagnesemia and renal magnesium wasting, establishing that HNF1B regulates FXYD2 transcription to control tubular Mg2+ handling. |
Luciferase reporter assay with HNF1 recognition site in FXYD2 promoter, clinical cohort analysis with plasma magnesium measurements |
Journal of the American Society of Nephrology : JASN |
Medium |
19389850
|
| 2010 |
vHNF1 (HNF1B) controls early kidney development through two distinct regulatory circuits: (1) it regulates ureteric bud (UB) outgrowth and branching morphogenesis in a cell-autonomous manner; (2) it maintains nephric duct epithelium, controls Müllerian duct formation, and regulates early nephrogenesis. vHNF1 directly controls Wnt9b, which acts upstream of mesenchymal-epithelial transitions initiating nephrogenesis. |
Conditional (Cre/loxP) and mosaic inactivation of vHnf1 in mouse kidney, in situ hybridization and expression analysis of Wnt9b and other target genes, ChIP for direct target confirmation |
Development (Cambridge, England) |
High |
20040500
|
| 2012 |
Compound heterozygous inactivation of Hnf1b and Pax2 in mice produces severe CAKUT phenotypes beyond those of either single heterozygote, revealing Hnf1b as a modifier of Pax2 haploinsufficiency. Compound mutants show delayed nephron segmentation, increased apoptosis, reduced Lim1/Wnt4 expression, and perturbation of ureter smooth muscle differentiation with downregulation of Bmp4 and Tbx18, establishing cooperative roles in kidney and ureter morphogenesis. |
Compound heterozygous mouse genetics, in situ hybridization, expression analysis of molecular markers |
Human molecular genetics |
High |
22511595
|
| 2015 |
Conditional inactivation of Hnf1b in mouse pancreas causes: (1) reduced pancreatic multipotent progenitor cell pool due to decreased proliferation and increased apoptosis; (2) cystic ducts with aberrant cell polarity and decreased expression of cystic disease genes; (3) loss/abnormal differentiation of acinar cells; and (4) absence of Ngn3+ endocrine precursors throughout embryogenesis. HNF1B directly occupies putative Ngn3 regulatory sequences in vivo. Glis3 is identified as a novel HNF1B downstream target controlling duct morphogenesis and endocrine development. |
Constitutive and inducible conditional Cre/loxP inactivation of Hnf1b at different developmental stages, ChIP (HNF1B occupancy at Ngn3 regulatory sequences), expression analysis, cell proliferation/apoptosis assays |
Development (Cambridge, England) |
High |
25715395
|
| 2017 |
Specific removal of Hnf1b from the ureteric bud causes defective cell-cell contacts, loss of apicobasal polarity, and decreased cell rearrangements during mitosis-associated cell dispersal, leading to severe epithelial disorganization, mispatterned ureteric tree, and cystogenesis. HNF1B acts both upstream and downstream of Ret signaling by directly regulating Gfra1 and Etv5. |
Ureteric bud-specific Cre/loxP conditional KO, high-resolution ex vivo live imaging with membranous fluorescent reporter, mRNA-seq, promoter/binding analysis for Gfra1/Etv5 |
Development (Cambridge, England) |
High |
29158444
|
| 2018 |
HNF1β directly represses Twist2 transcription in renal epithelial cells. Loss of HNF1β activates a Twist2-dependent transcriptional network including Snail1, Snail2, and Zeb2 (EMT transcription factors). HNF1β-deficient epithelial cells secrete high levels of TGF-β ligands that activate Smad transcription factors in renal interstitial cells, causing fibrosis through a cell-non-autonomous mechanism (not by direct epithelial-to-myofibroblast transdifferentiation, as shown by lineage tracing). |
HNF1β-deficient mIMCD3 cells, RNA-seq, ChIP (direct Twist2 repression), Twist2 knockdown rescue, cell lineage analysis in HNF1β mutant mice |
Journal of the American Society of Nephrology : JASN |
High |
30097458
|
| 2018 |
ERRγ and HNF1β cooperate to control renal reabsorption through convergent genomic binding; ERRγ directly regulates mitochondrial metabolism and cooperatively controls renal reabsorption via convergent binding with HNF1β. Deletion of ERRγ in renal epithelial cells phenocopies HNF1β loss-of-function, producing overlapping renal transcriptional signatures. |
Conditional renal epithelial ERRγ KO mouse, ChIP-seq showing co-occupancy, transcriptomic comparison to HNF1β mutant phenotype |
Proceedings of the National Academy of Sciences of the United States of America |
Medium |
29735694
|
| 2018 |
HNF1β is a transcriptional activator of the calcium-sensing receptor (CaSR) gene in the thick ascending limb (TAL) of the kidney; a conserved HNF1β binding site in CaSR intron 2 mediates this activation. A DNA-binding-deficient HNF1β mutant (p.Lys156Glu) abolishes CaSR expression. Hnf1β knockdown in TAL cells reduces CaSR and Cldn14 expression and upregulates Cldn10b; kidney-specific HNF1β KO mice show 81% downregulation of Casr. |
HNF1β ChIP-seq (binding site identification), luciferase-promoter assay, DNA-binding mutant (p.Lys156Glu), Hnf1β siRNA knockdown in MKTAL cells, kidney-specific HNF1β KO mouse, qRT-PCR |
American journal of physiology. Renal physiology |
High |
29561186
|
| 2019 |
HNF1B transcriptionally represses SLUG (SNAI2) expression through interaction with RBBP7/RbAP46, and this repression suppresses EMT. EZH2 directly binds the HNF1B locus and suppresses HNF1B expression in prostate cancer cells, establishing an EZH2→HNF1B→SLUG axis regulating EMT. |
ChIP-seq (HNF1B promoter binding by EZH2; HNF1B target gene binding), RNA-seq, Co-IP (HNF1B–RBBP7 interaction), luciferase reporter for SLUG, overexpression/knockdown cell assays, clinical correlation |
Oncogene |
Medium |
31636385
|
| 2021 |
MafA, NeuroD1, and HNF1β synergistically activate the Slc2a2 (Glut2) gene in β-cells through simultaneous binding to both the proximal promoter and a distal enhancer (ECR3') ~40 kb downstream. Co-immunoprecipitation suggests MafA, NeuroD1, and HNF1β physically interact with each other; simultaneous HNF1β binding to both regulatory elements is indispensable for transcriptional activation. |
Luciferase reporter assay, co-immunoprecipitation (MafA–NeuroD1–HNF1β complex), ChIP-seq data re-analysis, mutagenesis of binding sites |
Journal of molecular endocrinology |
Medium |
34223824
|
| 2022 |
HNF1B is essential for reprogramming mouse fibroblasts to induced renal tubular epithelial cells (iRECs) and for inducing ectopic pronephric tissue in Xenopus ectodermal organoids. The patient mutation R295C retains overall reprogramming capacity but selectively alters expression of specific downstream target gene sets rather than globally reducing HNF1β transcriptional activity. Cross-species conserved HNF1B transcriptional targets are dysregulated in hnf1b CRISPR-depleted Xenopus embryos. |
Direct reprogramming of mouse fibroblasts, Xenopus ectodermal explant assay, bulk RNA-seq (wild-type vs. R295C mutant), CRISPR/Cas9 in Xenopus |
Journal of the American Society of Nephrology : JASN |
High |
36522156
|
| 2022 |
The HNF1αp291fsinsC truncation (MODY3) interacts with HNF1β and inhibits its function in pancreatic progenitor differentiation; disrupting the HNF1α–HNF1β interaction partially rescues HNF1β-dependent transcription. HNF1β overexpression in the HNF1αp291fsinsC background increases PDX1+ progenitors and partially rescues β cell differentiation. |
hiPSC-derived 3D organoids, CRISPR/Cas9 engineering, Co-IP (HNF1αp291fsinsC–HNF1β interaction), HNF1β overexpression rescue, flow cytometry for progenitor markers |
Cell reports |
High |
35235779
|
| 2023 |
Müllerian duct-specific ablation of Hnf1b in mice causes hypoplastic uterine development and kidney anomalies, mirroring Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome type II. Single-cell RNA sequencing of uterine tissue from Hnf1b-ablated embryos reveals dysregulation of cell proliferation, migration, and differentiation pathways downstream of Hnf1b. |
Müllerian duct epithelium-specific Cre/loxP conditional KO, single-cell RNA sequencing, microarray analysis of patient material |
Human molecular genetics |
High |
36282544
|