1
|
Meijer I, Willems S, Ni X, Heering J, Chaikuad A, Merk D. Chemical Starting Matter for HNF4α Ligand Discovery and Chemogenomics. Int J Mol Sci 2020; 21:E7895. [PMID: 33114319 PMCID: PMC7660650 DOI: 10.3390/ijms21217895] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 10/16/2020] [Accepted: 10/21/2020] [Indexed: 12/11/2022] Open
Abstract
Hepatocyte nuclear factor 4α (HNF4α) is a ligand-sensing transcription factor and presents as a potential drug target in metabolic diseases and cancer. In humans, mutations in the HNF4α gene cause maturity-onset diabetes of the young (MODY), and the elevated activity of this protein has been associated with gastrointestinal cancers. Despite the high therapeutic potential, available ligands and structure-activity relationship knowledge for this nuclear receptor are scarce. Here, we disclose a chemically diverse collection of orthogonally validated fragment-like activators as well as inverse agonists, which modulate HNF4α activity in a low micromolar range. These compounds demonstrate the druggability of HNF4α and thus provide a starting point for medicinal chemistry as well as an early tool for chemogenomics.
Collapse
Affiliation(s)
- Isabelle Meijer
- Institute of Pharmaceutical Chemistry, Goethe University Frankfurt, Max-von-Laue-Str. 9, 60438 Frankfurt, Germany; (I.M.); (S.W.); (X.N.); (A.C.)
| | - Sabine Willems
- Institute of Pharmaceutical Chemistry, Goethe University Frankfurt, Max-von-Laue-Str. 9, 60438 Frankfurt, Germany; (I.M.); (S.W.); (X.N.); (A.C.)
| | - Xiaomin Ni
- Institute of Pharmaceutical Chemistry, Goethe University Frankfurt, Max-von-Laue-Str. 9, 60438 Frankfurt, Germany; (I.M.); (S.W.); (X.N.); (A.C.)
- Structural Genomics Consortium, BMLS, Goethe-University Frankfurt, Max-von-Laue-Str. 15, 60438 Frankfurt, Germany
| | - Jan Heering
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Branch for Translational Medicine and Pharmacology TMP, Theodor-Stern-Kai 7, 60596 Frankfurt, Germany;
| | - Apirat Chaikuad
- Institute of Pharmaceutical Chemistry, Goethe University Frankfurt, Max-von-Laue-Str. 9, 60438 Frankfurt, Germany; (I.M.); (S.W.); (X.N.); (A.C.)
- Structural Genomics Consortium, BMLS, Goethe-University Frankfurt, Max-von-Laue-Str. 15, 60438 Frankfurt, Germany
| | - Daniel Merk
- Institute of Pharmaceutical Chemistry, Goethe University Frankfurt, Max-von-Laue-Str. 9, 60438 Frankfurt, Germany; (I.M.); (S.W.); (X.N.); (A.C.)
| |
Collapse
|
2
|
Piskacek M, Havelka M, Jendruchova K, Knight A. Nuclear hormone receptors: Ancient 9aaTAD and evolutionally gained NCoA activation pathways. J Steroid Biochem Mol Biol 2019; 187:118-123. [PMID: 30468856 DOI: 10.1016/j.jsbmb.2018.11.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 11/18/2018] [Accepted: 11/18/2018] [Indexed: 12/12/2022]
Abstract
In higher metazoans, the nuclear hormone receptors activate transcription trough their specific adaptors, nuclear hormone receptor adaptors NCoA, which are absent in lower metazoans. The Nine amino acid TransActivation Domain, 9aaTAD, was reported for a large number of the transcription activators that recruit general mediators of transcription. In this study, we demonstrated that the 9aaTAD from NHR-49 receptor of nematode C.elegans activates transcription as a small peptide. We showed that the ancient 9aaTAD domains are conserved in the nuclear hormone receptors including human HNF4, RARa, VDR and PPARg. Also their small 9aaTAD peptides effectively activated transcription in absence of the NCoA adaptors. We also showed that adjacent H11 domains in ancient and modern hormone receptors have an inhibitory effect on their 9aaTAD function.
Collapse
Affiliation(s)
- Martin Piskacek
- Department of Pathological Physiology, Faculty of Medicine, Masaryk University Brno, Czech Republic; Laboratory of Cancer Biology and Genetics, Czech Republic; Gamma Delta T Cell Laboratory, Czech Republic.
| | - Marek Havelka
- Department of Pathological Physiology, Faculty of Medicine, Masaryk University Brno, Czech Republic; Laboratory of Cancer Biology and Genetics, Czech Republic; Gamma Delta T Cell Laboratory, Czech Republic
| | - Kristina Jendruchova
- Department of Pathological Physiology, Faculty of Medicine, Masaryk University Brno, Czech Republic; Laboratory of Cancer Biology and Genetics, Czech Republic; Gamma Delta T Cell Laboratory, Czech Republic
| | - Andrea Knight
- Department of Pathological Physiology, Faculty of Medicine, Masaryk University Brno, Czech Republic; Laboratory of Cancer Biology and Genetics, Czech Republic; Gamma Delta T Cell Laboratory, Czech Republic
| |
Collapse
|
3
|
Huang W, Ravikumar KM, Parisien M, Yang S. Theoretical modeling of multiprotein complexes by iSPOT: Integration of small-angle X-ray scattering, hydroxyl radical footprinting, and computational docking. J Struct Biol 2016; 196:340-349. [PMID: 27496803 DOI: 10.1016/j.jsb.2016.08.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Revised: 07/18/2016] [Accepted: 08/01/2016] [Indexed: 11/19/2022]
Abstract
Structural determination of protein-protein complexes such as multidomain nuclear receptors has been challenging for high-resolution structural techniques. Here, we present a combined use of multiple biophysical methods, termed iSPOT, an integration of shape information from small-angle X-ray scattering (SAXS), protection factors probed by hydroxyl radical footprinting, and a large series of computationally docked conformations from rigid-body or molecular dynamics (MD) simulations. Specifically tested on two model systems, the power of iSPOT is demonstrated to accurately predict the structures of a large protein-protein complex (TGFβ-FKBP12) and a multidomain nuclear receptor homodimer (HNF-4α), based on the structures of individual components of the complexes. Although neither SAXS nor footprinting alone can yield an unambiguous picture for each complex, the combination of both, seamlessly integrated in iSPOT, narrows down the best-fit structures that are about 3.2Å and 4.2Å in RMSD from their corresponding crystal structures, respectively. Furthermore, this proof-of-principle study based on the data synthetically derived from available crystal structures shows that the iSPOT-using either rigid-body or MD-based flexible docking-is capable of overcoming the shortcomings of standalone computational methods, especially for HNF-4α. By taking advantage of the integration of SAXS-based shape information and footprinting-based protection/accessibility as well as computational docking, this iSPOT platform is set to be a powerful approach towards accurate integrated modeling of many challenging multiprotein complexes.
Collapse
Affiliation(s)
- Wei Huang
- Center for Proteomics and Department of Nutrition, Case Western Reserve University, Cleveland, OH, USA
| | - Krishnakumar M Ravikumar
- Center for Proteomics and Department of Nutrition, Case Western Reserve University, Cleveland, OH, USA
| | - Marc Parisien
- Alan Edwards Centre for Research on Pain, McGill University, Montreal, Quebec, Canada
| | - Sichun Yang
- Center for Proteomics and Department of Nutrition, Case Western Reserve University, Cleveland, OH, USA.
| |
Collapse
|
4
|
Yang Y, Zhou TC, Liu YY, Li X, Wang WX, Irwin DM, Zhang YP. Identification of HNF4A Mutation p.T130I and HNF1A Mutations p.I27L and p.S487N in a Han Chinese Family with Early-Onset Maternally Inherited Type 2 Diabetes. J Diabetes Res 2016; 2016:3582616. [PMID: 26981542 PMCID: PMC4766352 DOI: 10.1155/2016/3582616] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Revised: 12/17/2015] [Accepted: 01/14/2016] [Indexed: 12/03/2022] Open
Abstract
Maturity-onset diabetes of the young (MODY) is characterized by the onset of diabetes before the age of 25 years, positive family history, high genetic predisposition, monogenic mutations, and an autosomal dominant mode of inheritance. Here, we aimed to investigate the mutations and to characterize the phenotypes of a Han Chinese family with early-onset maternally inherited type 2 diabetes. Detailed clinical assessments and genetic screening for mutations in the HNF4α, GCK, HNF-1α, IPF-1, HNF1β, and NEUROD1 genes were carried out in this family. One HNF4A mutation (p.T130I) and two HNF1A polymorphisms (p.I27L and p.S487N) were identified. Mutation p.T130I was associated with both early-onset and late-onset diabetes and caused downregulated HNF4A expression, whereas HNF1A polymorphisms p.I27L and p.S487N were associated with the age of diagnosis of diabetes. We demonstrated that mutation p.T130I in HNF4A was pathogenic as were the predicted polymorphisms p.I27L and p.S487N in HNF1A by genetic and functional analysis. Our results show that mutations in HNF4A and HNF1A genes might account for this early-onset inherited type 2 diabetes.
Collapse
Affiliation(s)
- Ying Yang
- Department of Endocrinology, The Second People's Hospital of Yunnan Province, Kunming, Yunnan 650021, China
- Laboratory for Conservation and Utilization of Bio-Resources, Yunnan University, Kunming, Yunnan 650091, China
| | - Tai-Cheng Zhou
- Department of Endocrinology, The Second People's Hospital of Yunnan Province, Kunming, Yunnan 650021, China
- Laboratory for Conservation and Utilization of Bio-Resources, Yunnan University, Kunming, Yunnan 650091, China
- The Central Laboratory of the Second People's Hospital of Yunnan Province, Kunming, Yunnan 650021, China
| | - Yong-Ying Liu
- Department of Endocrinology, The Second People's Hospital of Yunnan Province, Kunming, Yunnan 650021, China
| | - Xiao Li
- The Central Laboratory of the Second People's Hospital of Yunnan Province, Kunming, Yunnan 650021, China
| | - Wen-Xue Wang
- Laboratory of Biochemistry and Molecular Biology, Yunnan University, Kunming, Yunnan 650091, China
| | - David M. Irwin
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada M5S 2E8
| | - Ya-Ping Zhang
- Laboratory for Conservation and Utilization of Bio-Resources, Yunnan University, Kunming, Yunnan 650091, China
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
| |
Collapse
|
5
|
Suravajhala P, Singh TR. Is HNF4A a candidate to study zinc finger protein slug? Int J Bioinform Res Appl 2015; 11:366-373. [PMID: 26561320 DOI: 10.1504/ijbra.2015.070141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Protein-Protein Interactions (PPI) play a crucial role in deciphering function besides identifying candidates. While the experimental analysis is often time consuming involving number of experiments like pulldown assays, they are not necessarily limiting the ability to detect novel protein interactors. In this work, we discuss the role and putative interactors of SNAI2, a slug protein which is involved in the development of cancer progression. The protein interactions have been deciphered by domain pair exclusion method which gives confidence to already precluded interaction pairs. Additionally, conservation patterns of the slug protein have also been analysed by estimating site-specific evolutionary rates at structural level. Based upon the computational analysis, we consider HNF4A could be a putative candidate to study zinc finger protein slug. We believe, this candidate study augmented with structural conservation will definitely provide novel insights into the design and discovery of new interactions for zinc finger class of proteins besides providing possible clues for discovery of various cancer types associated with this class of proteins.
Collapse
Affiliation(s)
| | - Tiratha Raj Singh
- 2 Bioclues Organization, Kukatpally, Hyderabad 500072, Telangana, India; Department of Biotechnology and Bioinformatics, Jaypee University of Information Technology, Waknaghat, Solan, HP, India
| |
Collapse
|
6
|
Abstract
Epidemiological studies have shown that plasma SHBG levels correlate with plasma adiponectin levels, both in men and women. There are no reports describing any molecular mechanism by which adiponectin regulates hepatic SHBG production. The aim of the present study is to explore whether adiponectin regulates SHBG production by increasing HNF-4α levels through reducing hepatic lipid content. For this purpose, in vitro studies using human HepG2 cells, as well as human liver biopsies, were performed. Our results show that adiponectin treatment increased SHBG production via AMPK activation in HepG2 cells. Adiponectin treatment decreased the mRNA and protein levels of enzymes related to hepatic lipogenesis (ACC) and increased those related to fatty acid oxidation (ACOX and CPTI). These adiponectin-induced changes in hepatic enzymes resulted in a reduction of total TG and FFA and an increase of HNF-4α. When HNF-4α expression was silenced by using siRNA, adiponectin-induced SHBG overexpression was blocked. Furthermore, adiponectin-induced upregulation of SHBG production via HNF-4α overexpression was abrogated by the inhibition of fatty acid oxidation or by the induction of lipogenesis with a 30mM glucose treatment in HepG2 cells. Finally, adiponectin levels correlated positively and significantly with both HNF-4α and SHBG mRNA levels in human liver biopsies. Our results suggest for the first time that adiponectin increases SHBG production by activating AMPK, which reduces hepatic lipid content and increases HNF-4α levels.
Collapse
Affiliation(s)
- Rafael Simó
- Diabetes and Metabolism Research Unit (R.S., C.S.-L., C.H., D.M.S.), Vall d'Hebron Institut de Recerca, 08035 Barcelona, Universitat Autónoma de Barcelona, 08193 Barcelona, Centro de Investigación Biomédica en Red, 28029 Madrid, Spain Endocrinology and Nutrition Unit (A.L.), Hospital Universitari Arnau de Vilanova, 25198 Lleida, Spain; Endocrine, Metabolic and Bariatric Unit (J.M.F.), General Surgery Department, Hospital Universitari Vall d'Hebron, 08035 Barcelona, Spain
| | | | | | | | | | | |
Collapse
|
7
|
Han EH, Rha GB, Chi YI. MED25 is a mediator component of HNF4α-driven transcription leading to insulin secretion in pancreatic beta-cells. PLoS One 2012; 7:e44007. [PMID: 22952853 PMCID: PMC3431373 DOI: 10.1371/journal.pone.0044007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2012] [Accepted: 07/27/2012] [Indexed: 11/19/2022] Open
Abstract
Unique nuclear receptor Hepatocyte Nuclear Factor 4α (HNF4α) is an essential transcriptional regulator for early development and proper function of pancreatic ß-cells, and its mutations are monogenic causes of a dominant inherited form of diabetes referred to as Maturity Onset Diabetes of the Young 1 (MODY1). As a gene-specific transcription factor, HNF4α exerts its function through various molecular interactions, but its protein recruiting network has not been fully characterized. Here we report the identification of MED25 as one of the HNF4α binding partners in pancreatic ß-cells leading to insulin secretion which is impaired in MODY patients. MED25 is one of the subunits of the Mediator complex that is required for induction of RNA polymerase II transcription by various transcription factors including nuclear receptors. This HNF4α-MED25 interaction was initially identified by a yeast-two-hybrid method, confirmed by in vivo and in vitro analyses, and proven to be mediated through the MED25-LXXLL motif in a ligand-independent manner. Reporter-gene based transcription assays and siRNA/shRNA-based gene silencing approaches revealed that this interaction is crucial for full activation of HNF4α-mediated transcription, especially expression of target genes implicated in glucose-stimulated insulin secretion. Selected MODY mutations at the LXXLL motif binding pocket disrupt these interactions and cause impaired insulin secretion through a 'loss-of-function' mechanism.
Collapse
Affiliation(s)
- Eun Hee Han
- Section of Structural Biology, Hormel Institute, University of Minnesota, Austin, Minnesota, United States of America
| | - Geun Bae Rha
- Section of Structural Biology, Hormel Institute, University of Minnesota, Austin, Minnesota, United States of America
| | - Young-In Chi
- Section of Structural Biology, Hormel Institute, University of Minnesota, Austin, Minnesota, United States of America
- * E-mail:
| |
Collapse
|
8
|
Thanabalasingham G, Shah N, Vaxillaire M, Hansen T, Tuomi T, Gašperíková D, Szopa M, Tjora E, James TJ, Kokko P, Loiseleur F, Andersson E, Gaget S, Isomaa B, Nowak N, Raeder H, Stanik J, Njolstad PR, Malecki MT, Klimes I, Groop L, Pedersen O, Froguel P, McCarthy MI, Gloyn AL, Owen KR. A large multi-centre European study validates high-sensitivity C-reactive protein (hsCRP) as a clinical biomarker for the diagnosis of diabetes subtypes. Diabetologia 2011; 54:2801-10. [PMID: 21814873 DOI: 10.1007/s00125-011-2261-y] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2011] [Accepted: 06/30/2011] [Indexed: 12/21/2022]
Abstract
AIMS/HYPOTHESIS An accurate molecular diagnosis of diabetes subtype confers clinical benefits; however, many individuals with monogenic diabetes remain undiagnosed. Biomarkers could help to prioritise patients for genetic investigation. We recently demonstrated that high-sensitivity C-reactive protein (hsCRP) levels are lower in UK patients with hepatocyte nuclear factor 1 alpha (HNF1A)-MODY than in other diabetes subtypes. In this large multi-centre study we aimed to assess the clinical validity of hsCRP as a diagnostic biomarker, examine the genotype-phenotype relationship and compare different hsCRP assays. METHODS High-sensitivity CRP levels were analysed in individuals with HNF1A-MODY (n = 457), glucokinase (GCK)-MODY (n = 404), hepatocyte nuclear factor 4 alpha (HNF4A)-MODY (n = 54) and type 2 diabetes (n = 582) from seven European centres. Three common assays for hsCRP analysis were evaluated. We excluded 121 participants (8.1%) with hsCRP values >10 mg/l. The discriminative power of hsCRP with respect to diabetes aetiology was assessed by receiver operating characteristic curve-derived C-statistic. RESULTS In all centres and irrespective of the assay method, meta-analysis confirmed significantly lower hsCRP levels in those with HNF1A-MODY than in those with other aetiologies (z score -21.8, p < 5 × 10(-105)). HNF1A-MODY cases with missense mutations had lower hsCRP levels than those with truncating mutations (0.03 vs 0.08 mg/l, p < 5 × 10(-5)). High-sensitivity CRP values between assays were strongly correlated (r (2) ≥ 0.91, p ≤ 1 × 10(-5)). Across the seven centres, the C-statistic for distinguishing HNF1A-MODY from young adult-onset type 2 diabetes ranged from 0.79 to 0.97, indicating high discriminative accuracy. CONCLUSIONS/INTERPRETATION In the largest study to date, we have established that hsCRP is a clinically valid biomarker for HNF1A-MODY in European populations. Given the modest costs and wide availability, hsCRP could translate rapidly into clinical practice, considerably improving diagnosis rates in monogenic diabetes.
Collapse
Affiliation(s)
- G Thanabalasingham
- Oxford Centre for Diabetes Endocrinology and Metabolism, University of Oxford, Churchill Hospital, Headington, Oxford, OX3 7LJ, UK
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
9
|
Daigo K, Kawamura T, Ohta Y, Ohashi R, Katayose S, Tanaka T, Aburatani H, Naito M, Kodama T, Ihara S, Hamakubo T. Proteomic analysis of native hepatocyte nuclear factor-4α (HNF4α) isoforms, phosphorylation status, and interactive cofactors. J Biol Chem 2011; 286:674-86. [PMID: 21047794 PMCID: PMC3013027 DOI: 10.1074/jbc.m110.154732] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Hepatocyte nuclear factor-4α (HNF4α, NR2A1) is a nuclear receptor that has a critical role in hepatocyte differentiation and the maintenance of homeostasis in the adult liver. However, a detailed understanding of native HNF4α in the steady-state remains to be elucidated. Here we report the native HNF4α isoform, phosphorylation status, and complexes in the steady-state, as shown by shotgun proteomics in HepG2 hepatocarcinoma cells. Shotgun proteomic analysis revealed the complexity of native HNF4α, including multiple phosphorylation sites and inter-isoform heterodimerization. The associating complexes identified by label-free semiquantitative proteomic analysis include the following: the DNA-dependent protein kinase catalytic subunit, histone acetyltransferase complexes, mRNA splicing complex, other nuclear receptor coactivator complexes, the chromatin remodeling complex, and the nucleosome remodeling and histone deacetylation complex. Among the associating proteins, GRB10 interacting GYF protein 2 (GIGYF2, PERQ2) is a new candidate cofactor in metabolic regulation. Moreover, an unexpected heterodimerization of HNF4α and hepatocyte nuclear factor-4γ was found. A biochemical and genomewide analysis of transcriptional regulation showed that this heterodimerization activates gene transcription. The genes thus transcribed include the cell death-inducing DEF45-like effector b (CIDEB) gene, which is an important regulator of lipid metabolism in the liver. This suggests that the analysis of the distinctive stoichiometric balance of native HNF4α and its cofactor complexes described here are important for an accurate understanding of transcriptional regulation.
Collapse
Affiliation(s)
- Kenji Daigo
- From the Research Center for Advanced Science and Technology, University of Tokyo, Tokyo 153-8904
| | - Takeshi Kawamura
- From the Research Center for Advanced Science and Technology, University of Tokyo, Tokyo 153-8904
| | - Yoshihiro Ohta
- From the Research Center for Advanced Science and Technology, University of Tokyo, Tokyo 153-8904
| | - Riuko Ohashi
- the Division of Cellular and Molecular Pathology, Niigata University Graduate School of Medical and Dental Sciences, Niigata 951-8510, and
| | - Satoshi Katayose
- the Tsukuba Research Laboratories, JSR Corporation, Ibaraki 305-0841, Japan
| | - Toshiya Tanaka
- From the Research Center for Advanced Science and Technology, University of Tokyo, Tokyo 153-8904
| | - Hiroyuki Aburatani
- From the Research Center for Advanced Science and Technology, University of Tokyo, Tokyo 153-8904
| | - Makoto Naito
- the Division of Cellular and Molecular Pathology, Niigata University Graduate School of Medical and Dental Sciences, Niigata 951-8510, and
| | - Tatsuhiko Kodama
- From the Research Center for Advanced Science and Technology, University of Tokyo, Tokyo 153-8904
| | - Sigeo Ihara
- From the Research Center for Advanced Science and Technology, University of Tokyo, Tokyo 153-8904
| | - Takao Hamakubo
- From the Research Center for Advanced Science and Technology, University of Tokyo, Tokyo 153-8904
- To whom correspondence should be addressed: Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo 153-8904, Japan. Tel./Fax: 81-3-5452-5231; E-mail:
| |
Collapse
|
10
|
Abstract
The members of the nuclear receptor superfamily act as transcriptional regulatory factors and exhibit a multidomain structure characterized as domains A-E/F. This review focuses on a small, relatively understudied region at the extreme carboxy-terminus of the estrogen receptor (ER) alpha, the F domain. The F domain contributes to differences in the activity of ER alpha and beta subtypes; it is required for tamoxifen's agonist activity on an estrogen response element, and it modifies the receptor's interactions with coregulators including steroid receptor coactivator-1. The differences between the F domains of the ER alpha and beta subtypes and among the other members of the nuclear hormone receptor superfamily may offer opportunities for selective control of the activity of these proteins.
Collapse
Affiliation(s)
- Debra F Skafar
- Department of Physiology, Wayne State University School of Medicine, 540 E. Canfield, Detroit, MI, 48201, USA.
| | | |
Collapse
|
11
|
Leng S, Lu S, Yao Y, Kan Z, Morris GS, Stair BR, Cherny MA, Black DD. Hepatocyte nuclear factor-4 mediates apolipoprotein A-IV transcriptional regulation by fatty acid in newborn swine enterocytes. Am J Physiol Gastrointest Liver Physiol 2007; 293:G475-83. [PMID: 17556588 DOI: 10.1152/ajpgi.00072.2007] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Hepatocyte nuclear factor-4alpha (HNF-4alpha) regulates transcription of several genes involved in lipid metabolism, including that of apolipoprotein (apo) A-IV, which is tightly regulated by lipid absorption and enhances enterocyte chylomicron secretion. Studies were performed to define the role of HNF-4alpha in the regulation of apo A-IV gene transcription by dietary fatty acid in neonatal swine small intestine. HNF-4alpha mRNA was expressed in liver > intestine > kidney in suckling, weanling, and weaned pigs. Jejunal HNF-4alpha mRNA and protein and apo A-IV and swine microsomal triglyceride transfer protein (MTP) large subunit mRNA expression were induced in parallel in 2-day-old swine by a 24-h high-fat intraduodenal infusion. In IPEC-1 cells, incubation with oleic acid (OA) resulted in coordinate induction of both HNF-4alpha, apo A-IV, and MTP mRNA, similar to that observed in vivo. When HNF-4alpha expression was driven by doxycycline by using the TET-On system in the absence of OA to observe the effect of HNF-4alpha directly on apo A-IV and MTP mRNA levels in the absence of other factors that might be concomitantly induced by fatty acid absorption, apo A-IV and MTP expression were increased. In luciferase reporter gene assays in IPEC-1 cells using apo A-IV/C-III intergenic region constructs, TET-On-regulated HNF-4alpha expression without OA increased luciferase activity, and incubation with OA did not further increase activity. These data suggest that acute induction of the apo A-IV and MTP genes by dietary lipid in newborn intestine occurs, at least in part, via ligand-independent transactivation by HNF-4alpha that is itself induced by a lipid-mediated mechanism.
Collapse
Affiliation(s)
- Shuangying Leng
- Children's Foundation Research Center of Memphis, Le Bonheur Children's Medical Center, Department of Pediatrics, University of Tennessee Health Science Center, Memphis, TN 38103, USA
| | | | | | | | | | | | | | | |
Collapse
|
12
|
Sumi K, Tanaka T, Uchida A, Magoori K, Urashima Y, Ohashi R, Ohguchi H, Okamura M, Kudo H, Daigo K, Maejima T, Kojima N, Sakakibara I, Jiang S, Hasegawa G, Kim I, Osborne TF, Naito M, Gonzalez FJ, Hamakubo T, Kodama T, Sakai J. Cooperative interaction between hepatocyte nuclear factor 4 alpha and GATA transcription factors regulates ATP-binding cassette sterol transporters ABCG5 and ABCG8. Mol Cell Biol 2007; 27:4248-60. [PMID: 17403900 PMCID: PMC1900057 DOI: 10.1128/mcb.01894-06] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Cholesterol homeostasis is maintained by coordinate regulation of cholesterol synthesis and its conversion to bile acids in the liver. The excretion of cholesterol from liver and intestine is regulated by ATP-binding cassette half-transporters ABCG5 and ABCG8. The genes for these two proteins are closely linked and divergently transcribed from a common intergenic promoter region. Here, we identified a binding site for hepatocyte nuclear factor 4alpha (HNF4alpha) in the ABCG5/ABCG8 intergenic promoter, through which HNF4alpha strongly activated the expression of a reporter gene in both directions. The HNF4alpha-responsive element is flanked by two conserved GATA boxes that were also required for stimulation by HNF4alpha. GATA4 and GATA6 bind to the GATA boxes, coexpression of GATA4 and HNF4alpha leads to a striking synergistic activation of both the ABCG5 and the ABCG8 promoters, and binding sites for HNF4alpha and GATA were essential for maximal synergism. We also show that HNF4alpha, GATA4, and GATA6 colocalize in the nuclei of HepG2 cells and that a physical interaction between HNF4alpha and GATA4 is critical for the synergistic response. This is the first demonstration that HNF4alpha acts synergistically with GATA factors to activate gene expression in a bidirectional fashion.
Collapse
MESH Headings
- ATP Binding Cassette Transporter, Subfamily G, Member 5
- ATP Binding Cassette Transporter, Subfamily G, Member 8
- ATP-Binding Cassette Transporters/genetics
- ATP-Binding Cassette Transporters/metabolism
- Adenoviridae/genetics
- Amino Acid Motifs
- Amino Acid Sequence
- Base Sequence
- Binding Sites
- Carcinoma, Hepatocellular/metabolism
- Carcinoma, Hepatocellular/pathology
- Cell Line
- Cell Line, Tumor
- Consensus Sequence
- Conserved Sequence
- GATA4 Transcription Factor/genetics
- GATA4 Transcription Factor/metabolism
- GATA6 Transcription Factor/genetics
- GATA6 Transcription Factor/metabolism
- Gene Deletion
- Genes, Reporter
- Hepatocyte Nuclear Factor 4/chemistry
- Hepatocyte Nuclear Factor 4/metabolism
- Humans
- Lipoproteins/genetics
- Lipoproteins/metabolism
- Liver Neoplasms/metabolism
- Liver Neoplasms/pathology
- Luciferases/metabolism
- Molecular Sequence Data
- Oligonucleotide Array Sequence Analysis
- Promoter Regions, Genetic
- Protein Binding
- Protein Structure, Tertiary
- RNA Interference
- Sequence Homology, Amino Acid
- Sequence Homology, Nucleic Acid
Collapse
Affiliation(s)
- Koichi Sumi
- Laboratory of Systems Biology and Medicine, Research Center for Advanced Science and Technology, University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Ellard S, Colclough K. Mutations in the genes encoding the transcription factors hepatocyte nuclear factor 1 alpha (HNF1A) and 4 alpha (HNF4A) in maturity-onset diabetes of the young. Hum Mutat 2006; 27:854-69. [PMID: 16917892 DOI: 10.1002/humu.20357] [Citation(s) in RCA: 140] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Maturity-onset diabetes of the young (MODY) is a monogenic form of diabetes mellitus characterized by autosomal dominant inheritance, early age of onset (often <25 years of age), and pancreatic beta-cell dysfunction. MODY is both clinically and genetically heterogeneous, with six different genes identified to date; glucokinase (GCK), hepatocyte nuclear factor-1 alpha (HNF1A, or TCF1), hepatocyte nuclear factor-4 alpha (HNF4A), insulin promoter factor-1 (IPF1 or PDX1), hepatocyte nuclear factor-1 beta (HNF1B or TCF2), and neurogenic differentiation 1 (NEUROD1). Mutations in the HNF1A gene are a common cause of MODY in the majority of populations studied. A total of 193 different mutations have been described in 373 families. The most common mutation is Pro291fs (P291fsinsC) in the polycytosine (poly C) tract of exon 4, which has been reported in 65 families. HNF4A mutations are rarer; 31 mutations reported in 40 families. Sensitivity to treatment with sulfonylurea tablets is a feature of both HNF1A and HNF4A mutations. The identification of an HNF1A or 4A gene mutation confirms a diagnosis of MODY and has important implications for clinical management.
Collapse
Affiliation(s)
- Sian Ellard
- Department of Molecular Genetics, Royal Devon & Exeter NHS Foundation Trust, Exeter, United Kingdom.
| | | |
Collapse
|
14
|
Gerdin AK, Surve VV, Jönsson M, Bjursell M, Björkman M, Edenro A, Schuelke M, Saad A, Bjurström S, Lundgren EJ, Snaith M, Fransson-Steen R, Törnell J, Berg AL, Bohlooly-Y M. Phenotypic screening of hepatocyte nuclear factor (HNF) 4-gamma receptor knockout mice. Biochem Biophys Res Commun 2006; 349:825-32. [PMID: 16945327 DOI: 10.1016/j.bbrc.2006.08.103] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2006] [Accepted: 08/18/2006] [Indexed: 12/21/2022]
Abstract
Using the mouse as a model organism in pharmaceutical research presents unique advantages as its physiology in many ways resembles the human physiology, it also has a relatively short generation time, low breeding and maintenance costs, and is available in a wide variety of inbred strains. The ability to genetically modify mouse embryonic stem cells to generate mouse models that better mimic human disease is another advantage. In the present study, a comprehensive phenotypic screening protocol is applied to elucidate the phenotype of a novel mouse knockout model of hepatocyte nuclear factor (HNF) 4-gamma. HNF4-gamma is expressed in the kidneys, gut, pancreas, and testis. The first level of the screen is aimed at general health, morphologic appearance, normal cage behaviour, and gross neurological functions. The second level of the screen looks at metabolic characteristics and lung function. The third level of the screen investigates behaviour more in-depth and the fourth level consists of a thorough pathological characterisation, blood chemistry, haematology, and bone marrow analysis. When compared with littermate wild-type mice (HNF4-gamma(+/+)), the HNF4-gamma knockout (HNF4-gamma(-/-)) mice had lowered energy expenditure and locomotor activity during night time that resulted in a higher body weight despite having reduced intake of food and water. HNF4-gamma(-/-) mice were less inclined to build nest and were found to spend more time in a passive state during the forced swim test.
Collapse
Affiliation(s)
- Anna Karin Gerdin
- AstraZeneca Transgenic and Comparative Genomics, AstraZeneca R&D, Mölndal, Sweden
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Aggelidou E, Iordanidou P, Demetriades C, Piltsi O, Hadzopoulou-Cladaras M. Functional characterization of hepatocyte nuclear factor-4 alpha dimerization interface mutants. FEBS J 2006; 273:1948-58. [PMID: 16640558 DOI: 10.1111/j.1742-4658.2006.05208.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Hepatocyte nuclear factor-4 (HNF-4alpha), a member of the nuclear receptor superfamily, binds DNA exclusively as a homodimer. Dimerization controls important aspects of receptor function, such as DNA binding, protein stability, ligand binding and interaction with coactivators. Crystallographic data of the HNF-4alpha ligand-binding domain (LBD) demonstrated that the homodimer interface is composed of residues in helices 7, 9 and 10 with intermolecular salt bridges, hydrogen bonds and hydrophobic interactions contributing to the stability of the interface. To investigate the importance of the proposed ionic interactions for HNF-4alpha dimerization, interactions critical for formation of the LBD homodimer interface were disrupted by introducing point mutations in residues D261N (H7), E269Q (H7), Q307L (H9), D312N (H9) and Q336L (H10). Mutants were analysed for transactivation, coactivator interaction, DNA binding and dimerization. EMSA analysis showed that the mutants are able to bind DNA as dimers and coimmunoprecipitation assays confirmed dimerization in solution. Furthermore, the mutations do not compromise HNF-4alpha activity and are responsive to PPAR-gamma coactivator-1 (PGC-1). Finally, residue R324, located in the H9/H10 loop, which was suspected to be involved in dimer stabilization via an ionic interaction with residue E276, was studied. In contrast to the conservative substitution R324H the mutation R324L abolishes HNF-4alpha transcriptional activity and coactivator recruitment, revealing that the nature of substitution may play an important role in HNF-4alpha function.
Collapse
Affiliation(s)
- Eleni Aggelidou
- Department of Genetics, Development and Molecular Biology, Laboratory of Developmental Biology, School of Biology, Aristotle University of Thessaloniki, Greece
| | | | | | | | | |
Collapse
|
16
|
Guo H, Gao C, Mi Z, Wai P, Kuo P. Phosphorylation of Ser158 regulates inflammatory redox-dependent hepatocyte nuclear factor-4alpha transcriptional activity. Biochem J 2006; 394:379-87. [PMID: 16351573 PMCID: PMC1482807 DOI: 10.1042/bj20051730] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
In IL-1beta (interleukin 1beta)-stimulated rat hepatocytes exposed to superoxide, we have previously identified an IRX (inflammatory redox)-sensitive DR1 [direct repeat of RG(G/T)TCA with one base spacing] cis-acting activator element (nt -1327 to -1315) in the iNOS (inducible nitric oxide synthase) promoter: AGGTCAGGGGACA. The corresponding transcription factor was identified to be HNF4alpha (hepatocyte nuclear factor-4alpha). HNF4alpha DNA binding activity and transactivation potential are tightly regulated by its state of phosphorylation. However, the functional consequences of IRX-mediated post-translational phosphorylation of HNF4alpha have not been well characterized. In the setting of IL-1beta+H2O2, HNF4alpha functional activity is associated with a unique serine/threonine phosphorylation pattern. This indicates that an IRX-sensitive serine/threonine kinase pathway targets HNF4alpha to augment hepatocyte iNOS transcription. In the present study, following identification of phosphorylated residues in HNF4alpha, serial mutations were performed to render the target residues phosphorylation-resistant. Electrophoretic mobility-shift assays and transient transfection studies utilizing the iNOS promoter showed that the S158A mutation ablates IRX-mediated HNF4alpha DNA binding and transactivation. Gain-of-function mutation with the S158D phosphomimetic HNF4alpha vector supports a critical role for Ser158 phosphorylation. In vitro phosphorylation and kinase inhibitor studies implicate p38 kinase activity. Our results indicate that p38 kinase-mediated Ser158 phosphorylation is essential for augmentation of the DNA binding and transactivation potential of HNF4alpha in the presence of IL-1beta+H2O2. This pathway results in enhanced iNOS expression in hepatocytes exposed to pro-inflammatory cytokines and oxidative stress.
Collapse
Affiliation(s)
- Hongtao Guo
- Department of Surgery, Duke University Medical Center, Durham, NC 27514, U.S.A
| | - Chengjiang Gao
- Department of Surgery, Duke University Medical Center, Durham, NC 27514, U.S.A
| | - Zhiyong Mi
- Department of Surgery, Duke University Medical Center, Durham, NC 27514, U.S.A
| | - Philip Y. Wai
- Department of Surgery, Duke University Medical Center, Durham, NC 27514, U.S.A
| | - Paul C. Kuo
- Department of Surgery, Duke University Medical Center, Durham, NC 27514, U.S.A
- To whom correspondence should be addressed, at 110 Bell Bldg, DUMC Box 3522, Durham, NC 27710, U.S.A. (email )
| |
Collapse
|