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Martinand-Mari C, Debiais-Thibaud M, Potier E, Gasset E, Dutto G, Leurs N, Lallement S, Farcy E. Estradiol-17β and bisphenol A affect growth and mineralization in early life stages of seabass. Comp Biochem Physiol C Toxicol Pharmacol 2024; 281:109921. [PMID: 38609061 DOI: 10.1016/j.cbpc.2024.109921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 03/22/2024] [Accepted: 04/07/2024] [Indexed: 04/14/2024]
Abstract
Natural and synthetic estrogens are contaminants present in aquatic ecosystems. They can have significant consequences on the estrogen-sensitive functions of organisms, including skeletal development and growth of vertebrate larvae. Synthetic polyphenols represent a group of environmental xenoestrogens capable of binding the receptors for the natural hormone estradiol-17β (E2). To better understand how (xeno-)estrogens can affect the skeleton in fish species with high ecological and commercial interest, 16 days post-hatch larvae of the seabass were experimentally exposed for 7 days to E2 and Bisphenol A (BPA), both used at the regulatory concentration of surface water quality (E2: 0.4 ng.L-1, BPA: 1.6 μg.L-1) or at a concentration 100 times higher. Skeletal mineralization levels were evaluated using Alizarin red staining, and expression of several genes playing key roles in growth, skeletogenesis and estrogen signaling pathways was assessed by qPCR. Our results show that E2 exerts an overall negative effect on skeletal mineralization at the environmental concentration of 0.4 ng.L-1, correlated with an increase in the expression of genes associated only with osteoblast bone cells. Both BPA exposures inhibited mineralization with less severe effects and modified bone homeostasis by regulating the expression of gene encoding osteoblasts and osteoclasts markers. Our results demonstrate that environmental E2 exposure inhibits larval growth and has an additional inhibitory effect on skeleton mineralization while both BPA exposures have marginal inhibitory effect on skeletal mineralization. All exposures have significant effects on transcriptional levels of genes involved in the skeletal development of seabass larvae.
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Affiliation(s)
- Camille Martinand-Mari
- Institut des Sciences de l'Evolution de Montpellier, ISEM, Univ. Montpellier, CNRS, IRD, France.
| | - Melanie Debiais-Thibaud
- Institut des Sciences de l'Evolution de Montpellier, ISEM, Univ. Montpellier, CNRS, IRD, France
| | - Eric Potier
- Marine Biodiversity, Exploitation and Conservation, MARBEC, Univ. Montpellier, Ifremer, CNRS, IRD, France
| | - Eric Gasset
- Marine Biodiversity, Exploitation and Conservation, MARBEC, Univ. Montpellier, Ifremer, CNRS, IRD, France
| | - Gilbert Dutto
- Marine Biodiversity, Exploitation and Conservation, MARBEC, Univ. Montpellier, Ifremer, CNRS, IRD, France
| | - Nicolas Leurs
- Institut des Sciences de l'Evolution de Montpellier, ISEM, Univ. Montpellier, CNRS, IRD, France
| | - Stéphane Lallement
- Marine Biodiversity, Exploitation and Conservation, MARBEC, Univ. Montpellier, Ifremer, CNRS, IRD, France
| | - Emilie Farcy
- Marine Biodiversity, Exploitation and Conservation, MARBEC, Univ. Montpellier, Ifremer, CNRS, IRD, France.
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2
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Desmet SJ, Thommis J, Vanderhaeghen T, Vandenboorn EMF, Clarisse D, Li Y, Timmermans S, Fijalkowska D, Ratman D, Van Hamme E, De Cauwer L, Staels B, Brunsveld L, Peelman F, Libert C, Tavernier J, De Bosscher K. Crosstalk interactions between transcription factors ERRα and PPARα assist PPARα-mediated gene expression. Mol Metab 2024; 84:101938. [PMID: 38631478 PMCID: PMC11059514 DOI: 10.1016/j.molmet.2024.101938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 03/10/2024] [Accepted: 04/09/2024] [Indexed: 04/19/2024] Open
Abstract
OBJECTIVE The peroxisome proliferator-activated receptor α (PPARα) is a transcription factor driving target genes involved in fatty acid β-oxidation. To what extent various PPARα interacting proteins may assist its function as a transcription factor is incompletely understood. An ORFeome-wide unbiased mammalian protein-protein interaction trap (MAPPIT) using PPARα as bait revealed a PPARα-ligand-dependent interaction with the orphan nuclear receptor estrogen-related receptor α (ERRα). The goal of this study was to characterize the nature of the interaction in depth and to explore whether it was of physiological relevance. METHODS We used orthogonal protein-protein interaction assays and pharmacological inhibitors of ERRα in various systems to confirm a functional interaction and study the impact of crosstalk mechanisms. To characterize the interaction surfaces and contact points we applied a random mutagenesis screen and structural overlays. We pinpointed the extent of reciprocal ligand effects of both nuclear receptors via coregulator peptide recruitment assays. On PPARα targets revealed from a genome-wide transcriptome analysis, we performed an ERRα chromatin immunoprecipitation analysis on both fast and fed mouse livers. RESULTS Random mutagenesis scanning of PPARα's ligand-binding domain and coregulator profiling experiments supported the involvement of (a) bridging coregulator(s), while recapitulation of the interaction in vitro indicated the possibility of a trimeric interaction with RXRα. The PPARα·ERRα interaction depends on 3 C-terminal residues within helix 12 of ERRα and is strengthened by both PGC1α and serum deprivation. Pharmacological inhibition of ERRα decreased the interaction of ERRα to ligand-activated PPARα and revealed a transcriptome in line with enhanced mRNA expression of prototypical PPARα target genes, suggesting a role for ERRα as a transcriptional repressor. Strikingly, on other PPARα targets, including the isolated PDK4 enhancer, ERRα behaved oppositely. Chromatin immunoprecipitation analyses demonstrate a PPARα ligand-dependent ERRα recruitment onto chromatin at PPARα-binding regions, which is lost following ERRα inhibition in fed mouse livers. CONCLUSIONS Our data support the coexistence of multiple layers of transcriptional crosstalk mechanisms between PPARα and ERRα, which may serve to finetune the activity of PPARα as a nutrient-sensing transcription factor.
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Affiliation(s)
- Sofie J Desmet
- VIB Center for Medical Biotechnology, Belgium; Department of Biomolecular Medicine, Ghent University, 9000 Ghent, Belgium
| | - Jonathan Thommis
- VIB Center for Medical Biotechnology, Belgium; Department of Biomolecular Medicine, Ghent University, 9000 Ghent, Belgium
| | - Tineke Vanderhaeghen
- VIB Center for Inflammation Research, Belgium; Department of Biomedical Molecular Biology, Ghent University, 9000 Ghent, Belgium
| | - Edmee M F Vandenboorn
- Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, 5612AZ Eindhoven, the Netherlands
| | - Dorien Clarisse
- VIB Center for Medical Biotechnology, Belgium; Department of Biomolecular Medicine, Ghent University, 9000 Ghent, Belgium
| | - Yunkun Li
- VIB Center for Medical Biotechnology, Belgium; Department of Biomolecular Medicine, Ghent University, 9000 Ghent, Belgium
| | - Steven Timmermans
- VIB Center for Inflammation Research, Belgium; Department of Biomedical Molecular Biology, Ghent University, 9000 Ghent, Belgium
| | - Daria Fijalkowska
- VIB Center for Medical Biotechnology, Belgium; Department of Biomolecular Medicine, Ghent University, 9000 Ghent, Belgium
| | - Dariusz Ratman
- VIB Center for Medical Biotechnology, Belgium; Department of Biomolecular Medicine, Ghent University, 9000 Ghent, Belgium
| | | | - Lode De Cauwer
- VIB Center for Medical Biotechnology, Belgium; Department of Biomolecular Medicine, Ghent University, 9000 Ghent, Belgium
| | - Bart Staels
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, F-59000 Lille, France
| | - Luc Brunsveld
- Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, 5612AZ Eindhoven, the Netherlands
| | - Frank Peelman
- VIB Center for Medical Biotechnology, Belgium; Department of Biomolecular Medicine, Ghent University, 9000 Ghent, Belgium
| | - Claude Libert
- VIB Center for Inflammation Research, Belgium; Department of Biomedical Molecular Biology, Ghent University, 9000 Ghent, Belgium
| | - Jan Tavernier
- VIB Center for Medical Biotechnology, Belgium; Department of Biomolecular Medicine, Ghent University, 9000 Ghent, Belgium
| | - Karolien De Bosscher
- VIB Center for Medical Biotechnology, Belgium; Department of Biomolecular Medicine, Ghent University, 9000 Ghent, Belgium.
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3
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Geng DQ, Wang XL, Lyu XY, Raikhel AS, Zou Z. Ecdysone-controlled nuclear receptor ERR regulates metabolic homeostasis in the disease vector mosquito Aedes aegypti. PLoS Genet 2024; 20:e1011196. [PMID: 38466721 PMCID: PMC10957079 DOI: 10.1371/journal.pgen.1011196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 03/21/2024] [Accepted: 02/20/2024] [Indexed: 03/13/2024] Open
Abstract
Hematophagous mosquitoes require vertebrate blood for their reproductive cycles, making them effective vectors for transmitting dangerous human diseases. Thus, high-intensity metabolism is needed to support reproductive events of female mosquitoes. However, the regulatory mechanism linking metabolism and reproduction in mosquitoes remains largely unclear. In this study, we found that the expression of estrogen-related receptor (ERR), a nuclear receptor, is activated by the direct binding of 20-hydroxyecdysone (20E) and ecdysone receptor (EcR) to the ecdysone response element (EcRE) in the ERR promoter region during the gonadotropic cycle of Aedes aegypti (named AaERR). RNA interference (RNAi) of AaERR in female mosquitoes led to delayed development of ovaries. mRNA abundance of genes encoding key enzymes involved in carbohydrate metabolism (CM)-glucose-6-phosphate isomerase (GPI) and pyruvate kinase (PYK)-was significantly decreased in AaERR knockdown mosquitoes, while the levels of metabolites, such as glycogen, glucose, and trehalose, were elevated. The expression of fatty acid synthase (FAS) was notably downregulated, and lipid accumulation was reduced in response to AaERR depletion. Dual luciferase reporter assays and electrophoretic mobility shift assays (EMSA) determined that AaERR directly activated the expression of metabolic genes, such as GPI, PYK, and FAS, by binding to the corresponding AaERR-responsive motif in the promoter region of these genes. Our results have revealed an important role of AaERR in the regulation of metabolism during mosquito reproduction and offer a novel target for mosquito control.
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Affiliation(s)
- Dan-Qian Geng
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing, China
| | - Xue-Li Wang
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing, China
| | - Xiang-Yang Lyu
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing, China
| | - Alexander S. Raikhel
- Department of Entomology, University of California, Riverside, California, United States of America
- Institute for Integrative Genome Biology, University of California, Riverside, California, United States of America
| | - Zhen Zou
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing, China
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4
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Vanacker JM, Forcet C. ERRα: unraveling its role as a key player in cell migration. Oncogene 2024; 43:379-387. [PMID: 38129506 DOI: 10.1038/s41388-023-02899-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 10/31/2023] [Accepted: 11/14/2023] [Indexed: 12/23/2023]
Abstract
Cell migration is essential throughout the life of multicellular organisms, and largely depends on the spatial and temporal regulation of cytoskeletal dynamics, cell adhesion and signal transduction. Interestingly, Estrogen-related receptor alpha (ERRα) has been identified as a major regulator of cell migration in both physiological and pathological conditions. ERRα is an orphan member of the nuclear hormone receptor superfamily of transcription factors and displays many biological functions. ERRα is a global regulator of energy metabolism, and it is also highly involved in bone homeostasis, development, differentiation, immunity and cancer progression. Importantly, in some instances, the regulation of these biological processes relies on the ability to orchestrate cell movements. Therefore, this review describes how ERRα-mediated cell migration contributes not only to tissue homeostasis but also to tumorigenesis and metastasis, and highlights the molecular and cellular mechanisms by which ERRα finely controls the cell migratory potential.
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Affiliation(s)
- Jean-Marc Vanacker
- Centre de Recherche en Cancérologie de Lyon, CNRS UMR5286, Inserm U1052, Université de Lyon, Lyon, France
| | - Christelle Forcet
- Institut de Génomique Fonctionnelle de Lyon, UMR5242, Ecole Normale Supérieure de Lyon, Centre National de la Recherche Scientifique, Université Claude Bernard-Lyon 1, Lyon, France.
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5
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Hampton CS, Sitaula S, Billon C, Haynes K, Avdagic A, Wanninayake U, Adeyemi CM, Chatterjee A, Griffett K, Banerjee S, Burris SL, Schoepke E, Boehm T, Bess A, de Vera IMS, Burris TP, Walker JK. Development and pharmacological evaluation of a new chemical series of potent pan-ERR agonists, identification of SLU-PP-915. Eur J Med Chem 2023; 258:115582. [PMID: 37421886 PMCID: PMC10399613 DOI: 10.1016/j.ejmech.2023.115582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 06/13/2023] [Accepted: 06/17/2023] [Indexed: 07/10/2023]
Abstract
Estrogen-related receptors (ERR) are an orphan nuclear receptor sub-family that play a critical role in regulating gene transcription for several physiological processes including mitochondrial function, cellular energy utilization and homeostasis. They have also been implicated to play a role in several pathological conditions. Herein, we report the identification, synthesis, structure-activity relationships and pharmacological evaluation of a new chemical series of potent pan-ERR agonists. This template was designed for ERRγ starting from the known acyl hydrazide template and compounds such as agonist GSK-4716 employing a structure-based drug design approach. This led to the preparation of a series of 2,5-disubstituted thiophenes from which several were found to be potent agonists of ERRγ in cell-based co-transfection assays. Additionally, direct binding to ERRγ was established through 1H NMR protein-ligand binding experiments. Compound optimization revealed that the phenolic or aniline groups could be replaced with a boronic acid moiety, which was able to maintain activity and demonstrated improved metabolic stability in microsomal in vitro assays. Further pharmacological evaluation of these compounds showed that they had roughly equivalent agonist activity on ERR isoforms α and β representing an ERR pan-agonist profile. One potent agonist, SLU-PP-915 (10s), which contained a boronic acid moiety was profiled in gene expression assays and found to significantly upregulate the expression of ERR target genes such as peroxisome-proliferator activated receptor γ co-activators-1α, lactate dehydrogenase A, DNA damage inducible transcript 4 and pyruvate dehydrogenase kinase 4 both in vitro and in vivo.
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Affiliation(s)
- Carissa S Hampton
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, Missouri, 63104, United States
| | - Sadichha Sitaula
- Center for Clinical Pharmacology, St. Louis College of Pharmacy, Saint Louis, Missouri, 63110, United States
| | - Cyrielle Billon
- Center for Clinical Pharmacology, St. Louis College of Pharmacy, Saint Louis, Missouri, 63110, United States
| | - Keith Haynes
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, Missouri, 63104, United States
| | - Amer Avdagic
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, Missouri, 63104, United States
| | - Udayanga Wanninayake
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, Missouri, 63104, United States
| | - Christiana M Adeyemi
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, Missouri, 63104, United States
| | - Arindam Chatterjee
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, Missouri, 63104, United States
| | - Kristine Griffett
- Center for Clinical Pharmacology, St. Louis College of Pharmacy, Saint Louis, Missouri, 63110, United States
| | - Subhashis Banerjee
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, Missouri, 63104, United States
| | - Sheryl L Burris
- Center for Clinical Pharmacology, St. Louis College of Pharmacy, Saint Louis, Missouri, 63110, United States
| | - Emmalie Schoepke
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, Missouri, 63104, United States
| | - Terri Boehm
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, Missouri, 63104, United States
| | - Alex Bess
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, Missouri, 63104, United States
| | - Ian Mitchelle S de Vera
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, Missouri, 63104, United States
| | - Thomas P Burris
- University of Florida Genetics Institute, Gainesville, FL, 32310, USA
| | - John K Walker
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, Missouri, 63104, United States; Institute for Translational Neuroscience, Saint Louis University, St. Louis MO, 63110, United States.
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6
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Schüler-Toprak S, Skrzypczak M, Gründker C, Ortmann O, Treeck O. Role of Estrogen Receptor β, G-Protein Coupled Estrogen Receptor and Estrogen-Related Receptors in Endometrial and Ovarian Cancer. Cancers (Basel) 2023; 15:2845. [PMID: 37345182 DOI: 10.3390/cancers15102845] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 05/08/2023] [Accepted: 05/16/2023] [Indexed: 06/23/2023] Open
Abstract
Ovarian and endometrial cancers are affected by estrogens and their receptors. It has been long known that in different types of cancers, estrogens activate tumor cell proliferation via estrogen receptor α (ERα). In contrast, the role of ERs discovered later, including ERβ and G-protein-coupled ER (GPER1), in cancer is less well understood, but the current state of knowledge indicates them to have a considerable impact on both cancer development and progression. Moreover, estrogen related receptors (ERRs) have been reported to affect pathobiology of many tumor types. This article provides a summary and update of the current findings on the role of ERβ, GPER1, and ERRs in ovarian and endometrial cancer. For this purpose, original research articles on the role of ERβ, GPER1, and ERRs in ovarian and endometrial cancers listed in the PubMed database have been reviewed.
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Affiliation(s)
- Susanne Schüler-Toprak
- Department of Obstetrics and Gynecology, University Medical Center Regensburg, Caritas-Hospital St. Josef, 93053 Regensburg, Germany
| | - Maciej Skrzypczak
- Second Department of Gynecology, Medical University of Lublin, 20-954 Lublin, Poland
| | - Carsten Gründker
- Department of Gynecology and Obstetrics, University Medical Center Göttingen, 37075 Göttingen, Germany
| | - Olaf Ortmann
- Department of Obstetrics and Gynecology, University Medical Center Regensburg, Caritas-Hospital St. Josef, 93053 Regensburg, Germany
| | - Oliver Treeck
- Department of Obstetrics and Gynecology, University Medical Center Regensburg, Caritas-Hospital St. Josef, 93053 Regensburg, Germany
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7
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Gu W, Thitiphuree T, Otoki Y, Marquez EC, Kitano T, Itoh N, Nagasawa K, Osada M. Expression and functional analyses for estrogen receptor and estrogen related receptor of Yesso scallop, Patinopecten yessoensis. J Steroid Biochem Mol Biol 2023; 231:106302. [PMID: 36990165 DOI: 10.1016/j.jsbmb.2023.106302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 03/06/2023] [Accepted: 03/26/2023] [Indexed: 03/29/2023]
Abstract
Estrogen receptors (ERs) were known as estrogen-activated transcription factors and function as major reproduction regulators in vertebrates. The presence of er genes had been reported in Molluscan cephalopods and gastropods. However, they were considered as constitutive activators with unknown biological functions since reporter assays for these ERs did not show a specific response to estrogens. In this study, we tried characterization of ER orthologues from the Yesso scallop, Patinopecten yessoensis, in which estrogens had been proven to be produced in the gonads and involved in the spermatogenesis and vitellogenesis. Identified ER and estrogen related receptor (ERR) of Yesso scallops, designated as py-ER and py-ERR, conserved specific domain structures for a nuclear receptor. Their DNA binding domains showed high similarities to those of vertebrate ER orthologues, while ligand binding domains had low similarities with them. Both the py-er and py-err expression levels decreased in the ovary at the mature stage while py-vitellogenin expression increased in the ovary by quantitative real-time RT-PCR. Also, the py-er and py-err showed higher expressions in the testis than ovary during the developing and mature period, suggesting both genes might function in the spermatogenesis and testis development. The py-ER showed binding affinities to vertebrate estradiol-17β (E2). However, the intensity was weaker than the vertebrate ER, indicating scallops might exist endogenous estrogens with a different structure. On the other hand, the binding property of py-ERR to E2 was not confirmed in this assay, speculating that py-ERR was a constitutive activator as other vertebrate ERRs. Further, the py-er was localized in the spermatogonia in the testis and in the auxiliary cells in the ovary by in situ hybridization, indicating its potential roles in promoting spermatogenesis and vitellogenesis. Taken together, the present study demonstrated that py-ER was an authentic E2 receptor in the Yesso scallop and might have functions for the spermatogonia proliferation and vitellogenesis, while py-ERR was involved in the reproduction by undiscovered manners.
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Affiliation(s)
- Wenbin Gu
- Laboratory of Aquaculture Biology, Graduate School of Agricultural Science, Tohoku University, 468-1Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-0845, Japan
| | - Tongchai Thitiphuree
- Laboratory of Aquaculture Biology, Graduate School of Agricultural Science, Tohoku University, 468-1Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-0845, Japan
| | - Yurika Otoki
- Laboratory of Aquaculture Biology, Graduate School of Agricultural Science, Tohoku University, 468-1Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-0845, Japan
| | - Emily C Marquez
- Pesticide Action Network of North America, 1611 Telegraph Ave, Suite 1200, Oakland, CA 94612, USA
| | - Takeshi Kitano
- Department of Biological Sciences, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
| | - Naoki Itoh
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Kazue Nagasawa
- Laboratory of Aquaculture Biology, Graduate School of Agricultural Science, Tohoku University, 468-1Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-0845, Japan
| | - Makoto Osada
- Laboratory of Aquaculture Biology, Graduate School of Agricultural Science, Tohoku University, 468-1Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-0845, Japan.
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8
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Chang X, Liu J, Wang Y, Guan X, Liu R. Mitochondrial disorder and treatment of ischemic cardiomyopathy: Potential and advantages of Chinese herbal medicine. Biomed Pharmacother 2023; 159:114171. [PMID: 36641924 DOI: 10.1016/j.biopha.2022.114171] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 12/22/2022] [Accepted: 12/28/2022] [Indexed: 01/14/2023] Open
Abstract
Mitochondrial dysfunction is the main cause of damage to the pathological mechanism of ischemic cardiomyopathy. In addition, mitochondrial dysfunction can also affect the homeostasis of cardiomyocytes or endothelial cell dysfunction, leading to a vicious cycle of mitochondrial oxidative stress. And mitochondrial dysfunction is also an important pathological basis for ischemic cardiomyopathy and reperfusion injury after myocardial infarction or end-stage coronary heart disease. Therefore, mitochondria can be used as therapeutic targets against myocardial ischemia injury, and the regulation of mitochondrial morphology, function and structure is a key and important way of targeting mitochondrial quality control therapeutic mechanisms. Mitochondrial quality control includes mechanisms such as mitophagy, mitochondrial dynamics (mitochondrial fusion/fission), mitochondrial biosynthesis, and mitochondrial unfolded protein responses. Among them, the increase of mitochondrial fragmentation caused by mitochondrial pathological fission is the initial factor. The protective mitochondrial fusion can strengthen the interaction and synthesis of paired mitochondria and promote mitochondrial biosynthesis. In ischemia or hypoxia, pathological mitochondrial fission can promote the formation of mitochondrial fragments, fragmented mitochondria can lead to damaged mitochondrial DNA production, which can lead to mitochondrial biosynthesis dysfunction, insufficient mitochondrial ATP production, and mitochondrial ROS. Burst growth or loss of mitochondrial membrane potential. This eventually leads to the accumulation of damaged mitochondria. Then, under the leadership of mitophagy, damaged mitochondria can complete the mitochondrial degradation process through mitophagy, and transport the morphologically and structurally damaged mitochondria to lysosomes for degradation. But once the pathological mitochondrial fission increases, the damaged mitochondria increases, which may activate the pathway of cardiomyocyte death. Although laboratory studies have found that a variety of mitochondrial-targeted drugs can reduce myocardial ischemia and protect cardiomyocytes, there are still few drugs that have successfully passed clinical trials. In this review, we describe the role of MQS in ischemia/hypoxia-induced cardiomyocyte physiopathology and elucidate the relevant mechanisms of mitochondrial dysfunction in ischemic cardiomyopathy. In addition, we also further explained the advantages of natural products in improving mitochondrial dysfunction and protecting myocardial cells from the perspective of pharmacological mechanism, and explained its related mechanisms. Potential targeted therapies that can be used to improve MQS under ischemia/hypoxia are discussed, aiming to accelerate the development of cardioprotective drugs targeting mitochondrial dysfunction.
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Affiliation(s)
- Xing Chang
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, 100053, China
| | - Jinfeng Liu
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, 100053, China
| | - Yanli Wang
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, 100053, China
| | - Xuanke Guan
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, 100053, China
| | - Ruxiu Liu
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, 100053, China.
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9
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Cerutti C, Shi JR, Vanacker JM. Multifaceted Transcriptional Network of Estrogen-Related Receptor Alpha in Health and Disease. Int J Mol Sci 2023; 24:ijms24054265. [PMID: 36901694 PMCID: PMC10002233 DOI: 10.3390/ijms24054265] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 02/15/2023] [Accepted: 02/18/2023] [Indexed: 02/23/2023] Open
Abstract
Estrogen-related receptors (ERRα, β and γ in mammals) are orphan members of the nuclear receptor superfamily acting as transcription factors. ERRs are expressed in several cell types and they display various functions in normal and pathological contexts. Amongst others, they are notably involved in bone homeostasis, energy metabolism and cancer progression. In contrast to other nuclear receptors, the activities of the ERRs are apparently not controlled by a natural ligand but they rely on other means such as the availability of transcriptional co-regulators. Here we focus on ERRα and review the variety of co-regulators that have been identified by various means for this receptor and their reported target genes. ERRα cooperates with distinct co-regulators to control the expression of distinct sets of target genes. This exemplifies the combinatorial specificity of transcriptional regulation that induces discrete cellular phenotypes depending on the selected coregulator. We finally propose an integrated view of the ERRα transcriptional network.
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10
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Na SY, Kim KS, Jung YS, Kim DK, Kim J, Cho SJ, Lee IK, Chung J, Kim JS, Choi HS. An Inverse Agonist GSK5182 Increases Protein Stability of the Orphan Nuclear Receptor ERRγ via Inhibition of Ubiquitination. Int J Mol Sci 2022; 24:ijms24010096. [PMID: 36613556 PMCID: PMC9820335 DOI: 10.3390/ijms24010096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 12/13/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022] Open
Abstract
The orphan nuclear receptor, estrogen-related receptor γ (ERRγ) is a constitutively active transcription factor involved in mitochondrial metabolism and energy homeostasis. GSK5182, a specific inverse agonist of ERRγ that inhibits transcriptional activity, induces a conformational change in ERRγ, resulting in a loss of coactivator binding. However, the molecular mechanism underlying the stabilization of the ERRγ protein by its inverse agonist remains largely unknown. In this study, we found that GSK5182 inhibited ubiquitination of ERRγ, thereby stabilizing the ERRγ protein, using cell-based assays and confocal image analysis. Y326 of ERRγ was essential for stabilization by GSK5182, as ligand-induced stabilization of ERRγ was not observed with the ERRγ-Y326A mutant. GSK5182 suppressed ubiquitination of ERRγ by the E3 ligase Parkin and subsequent degradation. The inhibitory activity of GSK5182 was strong even when the ERRγ protein level was elevated, as ERRγ bound to GSK5182 recruited a corepressor, small heterodimer partner-interacting leucine zipper (SMILE), through the activation function 2 (AF-2) domain, without alteration of the nuclear localization or DNA-binding ability of ERRγ. In addition, the AF-2 domain of ERRγ was critical for the regulation of protein stability. Mutants in the AF-2 domain were present at higher levels than the wild type in the absence of GSK5182. Furthermore, the ERRγ-L449A/L451A mutant was no longer susceptible to GSK5182. Thus, the AF-2 domain of ERRγ is responsible for the regulation of transcriptional activity and protein stability by GSK5182. These findings suggest that GSK5182 regulates ERRγ by a unique molecular mechanism, increasing the inactive form of ERRγ via inhibition of ubiquitination.
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Affiliation(s)
- Soon-Young Na
- School of Biological Sciences and Technology, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Ki-Sun Kim
- School of Biological Sciences and Technology, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Yoon Seok Jung
- School of Biological Sciences and Technology, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Don-Kyu Kim
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Jina Kim
- New Drug Development Center, Daegu Gyeongbuk Medical Innovation Foundation, Daegu 41061, Republic of Korea
| | - Sung Jin Cho
- Center for Brain Disorders, Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - In-Kyu Lee
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu 41944, Republic of Korea
- Research Institute of Aging and Metabolism, Kyungpook National University, Daegu 41940, Republic of Korea
| | - Jongkyeong Chung
- SRC Center for Systems Geroscience, Institute of Molecular Biology and Genetics, School of Biological Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Jeong-Sun Kim
- Department of Chemistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Hueng-Sik Choi
- School of Biological Sciences and Technology, Chonnam National University, Gwangju 61186, Republic of Korea
- Correspondence: ; Tel.: +82-62-530-0503
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11
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Feng C, Xu Z, Tang X, Cao H, Zhang G, Tan J. Estrogen-Related Receptor α: A Significant Regulator and Promising Target in Bone Homeostasis and Bone Metastasis. Molecules 2022; 27:3976. [PMID: 35807221 PMCID: PMC9268386 DOI: 10.3390/molecules27133976] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 06/11/2022] [Accepted: 06/20/2022] [Indexed: 01/23/2023] Open
Abstract
Bone homeostasis is maintained with the balance between bone formation and bone resorption, which is involved in the functional performance of osteoblast and osteoclast. Disruption of this equilibrium usually causes bone disorders including osteoporosis, osteoarthritis, and osteosclerosis. In addition, aberrant activity of bone also contributes to the bone metastasis that frequently occurs in the late stage of aggressive cancers. Orphan nuclear receptor estrogen-related receptor (ERRα) has been demonstrated to control the bone cell fate and the progression of tumor cells in bone through crosstalk with various molecules and signaling pathways. However, the defined function of this receptor in bone is inconsistent and controversial. Therefore, we summarized the latest research and conducted an overview to reveal the regulatory effect of ERRα on bone homeostasis and bone metastasis, this review may broaden the present understanding of the cellular and molecular model of ERRα and highlight its potential implication in clinical therapy.
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Affiliation(s)
- Chun Feng
- School of Pharmacy, Shandong Technology Innovation Center of Molecular Targeting and Intelligent Diagnosis and Treatment, Binzhou Medical University, Yantai 264003, China; (C.F.); (Z.X.)
| | - Zhaowei Xu
- School of Pharmacy, Shandong Technology Innovation Center of Molecular Targeting and Intelligent Diagnosis and Treatment, Binzhou Medical University, Yantai 264003, China; (C.F.); (Z.X.)
| | - Xiaojie Tang
- Department of Spinal Surgery, Yantai Affiliated Hospital of Binzhou Medical University, Yantai 264100, China; (X.T.); (H.C.)
| | - Haifei Cao
- Department of Spinal Surgery, Yantai Affiliated Hospital of Binzhou Medical University, Yantai 264100, China; (X.T.); (H.C.)
| | - Guilong Zhang
- School of Pharmacy, Shandong Technology Innovation Center of Molecular Targeting and Intelligent Diagnosis and Treatment, Binzhou Medical University, Yantai 264003, China; (C.F.); (Z.X.)
| | - Jiangwei Tan
- Department of Spinal Surgery, Yantai Affiliated Hospital of Binzhou Medical University, Yantai 264100, China; (X.T.); (H.C.)
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12
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Kalinkovich A, Livshits G. Biased and allosteric modulation of bone cell-expressing G protein-coupled receptors as a novel approach to osteoporosis therapy. Pharmacol Res 2021; 171:105794. [PMID: 34329703 DOI: 10.1016/j.phrs.2021.105794] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 07/20/2021] [Accepted: 07/25/2021] [Indexed: 12/16/2022]
Abstract
On the cellular level, osteoporosis (OP) is a result of imbalanced bone remodeling, in which osteoclastic bone resorption outcompetes osteoblastic bone formation. Currently available OP medications include both antiresorptive and bone-forming drugs. However, their long-term use in OP patients, mainly in postmenopausal women, is accompanied by severe side effects. Notably, the fundamental coupling between bone resorption and formation processes underlies the existence of an undesirable secondary outcome that bone anabolic or anti-resorptive drugs also reduce bone formation. This drawback requires the development of anti-OP drugs capable of selectively stimulating osteoblastogenesis and concomitantly reducing osteoclastogenesis. We propose that the application of small synthetic biased and allosteric modulators of bone cell receptors, which belong to the G-protein coupled receptors (GPCR) family, could be the key to resolving the undesired anti-OP drug selectivity. This approach is based on the capacity of these GPCR modulators, unlike the natural ligands, to trigger signaling pathways that promote beneficial effects on bone remodeling while blocking potentially deleterious effects. Under the settings of OP, an optimal anti-OP drug should provide fine-tuned regulation of downstream effects, for example, intermittent cyclic AMP (cAMP) elevation, preservation of Ca2+ balance, stimulation of osteoprotegerin (OPG) and estrogen production, suppression of sclerostin secretion, and/or preserved/enhanced canonical β-catenin/Wnt signaling pathway. As such, selective modulation of GPCRs involved in bone remodeling presents a promising approach in OP treatment. This review focuses on the evidence for the validity of our hypothesis.
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Affiliation(s)
- Alexander Kalinkovich
- Department of Anatomy and Anthropology, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv 6905126, Israel
| | - Gregory Livshits
- Department of Anatomy and Anthropology, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv 6905126, Israel; Adelson School of Medicine, Ariel University, Ariel 4077625, Israel.
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13
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Scholtes C, Giguère V. Transcriptional Regulation of ROS Homeostasis by the ERR Subfamily of Nuclear Receptors. Antioxidants (Basel) 2021; 10:antiox10030437. [PMID: 33809291 PMCID: PMC7999130 DOI: 10.3390/antiox10030437] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 03/09/2021] [Accepted: 03/10/2021] [Indexed: 01/08/2023] Open
Abstract
Reactive oxygen species (ROS) such as superoxide anion (O2•-) and hydrogen peroxide (H2O2) are generated endogenously by processes such as mitochondrial oxidative phosphorylation, or they may arise from exogenous sources like bacterial invasion. ROS can be beneficial (oxidative eustress) as signaling molecules but also harmful (oxidative distress) to cells when ROS levels become unregulated in response to physiological, pathological or pharmacological insults. Indeed, abnormal ROS levels have been shown to contribute to the etiology of a wide variety of diseases. Transcriptional control of metabolic genes is a crucial mechanism to coordinate ROS homeostasis. Therefore, a better understanding of how ROS metabolism is regulated by specific transcription factors can contribute to uncovering new therapeutic strategies. A large body of work has positioned the estrogen-related receptors (ERRs), transcription factors belonging to the nuclear receptor superfamily, as not only master regulators of cellular energy metabolism but, most recently, of ROS metabolism. Herein, we will review the role played by the ERRs as transcriptional regulators of ROS generation and antioxidant mechanisms and also as ROS sensors. We will assess how the control of ROS homeostasis by the ERRs can be linked to physiology and disease and the possible contribution of manipulating ERR activity in redox medicine.
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Affiliation(s)
- Charlotte Scholtes
- Rosalind and Morris Goodman Cancer Research Centre, McGill University, Montréal, QC H3A 1A3, Canada;
| | - Vincent Giguère
- Rosalind and Morris Goodman Cancer Research Centre, McGill University, Montréal, QC H3A 1A3, Canada;
- Department of Biochemistry, McGill University, Montréal, QC H3G 1Y6, Canada
- Correspondence:
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14
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Miglioli A, Canesi L, Gomes IDL, Schubert M, Dumollard R. Nuclear Receptors and Development of Marine Invertebrates. Genes (Basel) 2021; 12:genes12010083. [PMID: 33440651 PMCID: PMC7827873 DOI: 10.3390/genes12010083] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 12/31/2020] [Accepted: 01/04/2021] [Indexed: 12/12/2022] Open
Abstract
Nuclear Receptors (NRs) are a superfamily of transcription factors specific to metazoans that have the unique ability to directly translate the message of a signaling molecule into a transcriptional response. In vertebrates, NRs are pivotal players in countless processes of both embryonic and adult physiology, with embryonic development being one of the most dynamic periods of NR activity. Accumulating evidence suggests that NR signaling is also a major regulator of development in marine invertebrates, although ligands and transactivation dynamics are not necessarily conserved with respect to vertebrates. The explosion of genome sequencing projects and the interpretation of the resulting data in a phylogenetic context allowed significant progress toward an understanding of NR superfamily evolution, both in terms of molecular activities and developmental functions. In this context, marine invertebrates have been crucial for characterizing the ancestral states of NR-ligand interactions, further strengthening the importance of these organisms in the field of evolutionary developmental biology.
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Affiliation(s)
- Angelica Miglioli
- Laboratoire de Biologie du Développement de Villefranche-sur-Mer (LBDV), Institut de la Mer de Villefranche, Sorbonne Université, CNRS, 181 Chemin du Lazaret, 06230 Villefranche-sur-Mer, France; (A.M.); (I.D.L.G.); (M.S.)
- Dipartimento di Scienze della Terra, dell’Ambiente e della Vita (DISTAV), Università degli Studi di Genova, Corso Europa 26, 16132 Genova, Italy;
| | - Laura Canesi
- Dipartimento di Scienze della Terra, dell’Ambiente e della Vita (DISTAV), Università degli Studi di Genova, Corso Europa 26, 16132 Genova, Italy;
| | - Isa D. L. Gomes
- Laboratoire de Biologie du Développement de Villefranche-sur-Mer (LBDV), Institut de la Mer de Villefranche, Sorbonne Université, CNRS, 181 Chemin du Lazaret, 06230 Villefranche-sur-Mer, France; (A.M.); (I.D.L.G.); (M.S.)
| | - Michael Schubert
- Laboratoire de Biologie du Développement de Villefranche-sur-Mer (LBDV), Institut de la Mer de Villefranche, Sorbonne Université, CNRS, 181 Chemin du Lazaret, 06230 Villefranche-sur-Mer, France; (A.M.); (I.D.L.G.); (M.S.)
| | - Rémi Dumollard
- Laboratoire de Biologie du Développement de Villefranche-sur-Mer (LBDV), Institut de la Mer de Villefranche, Sorbonne Université, CNRS, 181 Chemin du Lazaret, 06230 Villefranche-sur-Mer, France; (A.M.); (I.D.L.G.); (M.S.)
- Correspondence:
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15
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Huang X, Ruan G, Liu G, Gao Y, Sun P. Immunohistochemical Analysis of PGC-1α and ERRα Expression Reveals Their Clinical Significance in Human Ovarian Cancer. Onco Targets Ther 2020; 13:13055-13062. [PMID: 33376354 PMCID: PMC7764629 DOI: 10.2147/ott.s288332] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 12/03/2020] [Indexed: 12/18/2022] Open
Abstract
Purpose Peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α) and estrogen-related receptor alpha (ERRα) play a vital role in various human cancers. The purpose of this study was to investigate whether the PGC-1α/ERRα axis could serve as an effective prognostic marker in ovarian cancer (OC). Patients and Methods We investigated the expression of both PGC-1α and ERRα in 42 ovarian cancer and 31 noncancerous ovarian samples by immunohistochemistry (IHC). The relationship between the expression of PGC-1α and ERRα in OC and the clinical characteristics of patients was evaluated. In addition, data from the Human Protein Atlas (HPA) database were collected to validate the prognostic significance of PGC-1α and ERRα mRNA expression in OC. Results PGC-1α and ERRα showed notably higher expression in OC tissues than in noncancerous tissues (P=0.0059, P=0.002). Moreover, in patients with OC, high ERRα and PGC-1α/ERRα expression significantly correlated with tumor differentiation (P=0.027; P=0.04), lymph node status (P=0.023; P=0.021), CA125 (P=0.036; P=0.021), and HE4 (P=0.021; P=0.05), while high PGC-1α expression was only significantly associated with tumor differentiation (P=0.029). The combined analysis of high PGC-1α and ERRα expression revealed a tendency towards poor cancer-specific survival (P=0.1276). Conclusion PGC-1α and ERRα are overexpressed in OC and might be significant prognostic factors for this cancer.
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Affiliation(s)
- Xiqi Huang
- Laboratory of Gynecologic Oncology, Fujian Provincial Maternity and Children's Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, People's Republic of China
| | - Guanyu Ruan
- Laboratory of Gynecologic Oncology, Fujian Provincial Maternity and Children's Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, People's Republic of China.,Key Laboratory of Women and Children's Critical Diseases Research, Fujian Provincial Maternity and Children's Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, People's Republic of China
| | - Guifen Liu
- Laboratory of Gynecologic Oncology, Fujian Provincial Maternity and Children's Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, People's Republic of China
| | - Yuqin Gao
- Laboratory of Gynecologic Oncology, Fujian Provincial Maternity and Children's Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, People's Republic of China
| | - Pengming Sun
- Laboratory of Gynecologic Oncology, Fujian Provincial Maternity and Children's Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, People's Republic of China.,Key Laboratory of Women and Children's Critical Diseases Research, Fujian Provincial Maternity and Children's Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, People's Republic of China
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