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Jacquot Y, de Cremoux P, Harvey BJ, Wehling M. Editorial: 13th International Meeting on Rapid Responses to Steroid Hormones, Paris, 20-23 September 2022 - In Memoriam Anthony W. Norman (1938-2019). Steroids 2024; 202:109353. [PMID: 38135013 DOI: 10.1016/j.steroids.2023.109353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2023]
Affiliation(s)
| | | | - Brian J Harvey
- Royal College of Surgeons in Ireland (RCSI), Dublin, Ireland
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2
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Jouffre B, Acramel A, Jacquot Y, Daulhac L, Mallet C. GPER involvement in inflammatory pain. Steroids 2023; 200:109311. [PMID: 37734514 DOI: 10.1016/j.steroids.2023.109311] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 09/11/2023] [Accepted: 09/18/2023] [Indexed: 09/23/2023]
Abstract
Chronic pain is a worldwide refractory health disease that causes major financial and emotional burdens and that is devastating for individuals and society. One primary source of pain is inflammation. Current treatments for inflammatory pain are weakly effective, although they usually replace analgesics, such as opioids and non-steroidal anti-inflammatory drugs, which display serious side effects. Emerging evidence indicates that the membrane G protein-coupled estrogen receptor (GPER) may play an important role in the regulation of inflammation and pain. Herein, we focus on the consequences of pharmacological and genetic GPER modulation in different animal models of inflammatory pain. We also provide a brief overview of the putative mechanisms including the direct action of GPER on pain transmission and inflammation.
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Affiliation(s)
- Baptiste Jouffre
- Université Clermont Auvergne, Inserm U1107 Neuro-Dol, Pharmacologie Fondamentale et Clinique de la Douleur, Clermont-Ferrand, France; ANALGESIA Institute, Faculty of Medicine, 63000 Clermont-Ferrand, France
| | - Alexandre Acramel
- CiTCoM, CNRS - UMR 8038, INSERM U1268, Faculty of Pharmacy of Paris, University Paris Cité, 75270 Paris Cedex 06, France; Department of Pharmacy, Institut Curie, 75248 Paris Cedex 06, France
| | - Yves Jacquot
- CiTCoM, CNRS - UMR 8038, INSERM U1268, Faculty of Pharmacy of Paris, University Paris Cité, 75270 Paris Cedex 06, France
| | - Laurence Daulhac
- Université Clermont Auvergne, Inserm U1107 Neuro-Dol, Pharmacologie Fondamentale et Clinique de la Douleur, Clermont-Ferrand, France; ANALGESIA Institute, Faculty of Medicine, 63000 Clermont-Ferrand, France
| | - Christophe Mallet
- Université Clermont Auvergne, Inserm U1107 Neuro-Dol, Pharmacologie Fondamentale et Clinique de la Douleur, Clermont-Ferrand, France; ANALGESIA Institute, Faculty of Medicine, 63000 Clermont-Ferrand, France.
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3
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Jacquot Y, de Cremoux P, Harvey BJ, Wehling M. The Rapid Responses to Steroid Hormones meetings: An important event for steroid science. Ann Endocrinol (Paris) 2023; 84:235-237. [PMID: 36822474 DOI: 10.1016/j.ando.2023.02.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 02/06/2023] [Accepted: 02/13/2023] [Indexed: 02/23/2023]
Affiliation(s)
- Yves Jacquot
- CiTCoM Laboratory, CNRS UMR 8038, INSERM Unit 1268, Faculté de Pharmacie de Paris, Université Paris Cité, 75252 Paris cedex 06, France.
| | | | - Brian J Harvey
- Faculty of Medicine and Health Sciences, Royal College of Surgeons in Ireland (RCSI), St Stephen's Green, Dublin 2, Ireland
| | - Martin Wehling
- University of Heidelberg, Medical Faculty, Mannheim, Germany
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Terrien A, Rahgoshay K, Renaglia E, Lensen N, Jacquot Y, Marquant R, Brigaud T, Loison C, Chaume G, Miclet E. Inviting C5-Trifluoromethylated Pseudoprolines into Collagen Mimetic Peptides. Biomacromolecules 2023; 24:1555-1562. [PMID: 36786736 DOI: 10.1021/acs.biomac.2c01242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
Numerous collagen mimetic peptides (CMPs) have been engineered using proline derivatives substituted at their C(3) and/or C(4) position in order to stabilize or functionalize collagen triple-helix mimics. However, no example has been reported so far with C(5) substitutions. Here, we introduce a fluorinated CMP incorporating trifluoromethyl groups at the C(5) position of pseudoproline residues. In tripeptide models, our CD, NMR, and molecular dynamics (MD) studies have shown that, when properly arranged, these residues meet the structural requirements for a triple-helix assembly. Two host-guest CMPs were synthesized and analyzed by CD spectroscopy. The NMR analysis in solution of the most stable confirmed the presence of structured homotrimers that we interpret as triple helices. MD calculations showed that the triple-helix model remained stable throughout the simulation with all six trifluoromethyl groups pointing outward from the triple helix. Pseudoprolines substituted at the C(5) positions appeared as valuable tools for the design of new fluorinated collagen mimetic peptides.
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Affiliation(s)
- Anaïs Terrien
- Laboratoire des Biomolécules, Sorbonne Université, Ecole Normale Supérieure, PSL University, CNRS, 4 place Jussieu, 75252 Paris Cedex 05, France
| | - Keyvan Rahgoshay
- CY Cergy Paris Université, CNRS, BioCIS, 95000 Cergy-Pontoise, France
| | - Emelyne Renaglia
- CY Cergy Paris Université, CNRS, BioCIS, 95000 Cergy-Pontoise, France
| | - Nathalie Lensen
- CY Cergy Paris Université, CNRS, BioCIS, 95000 Cergy-Pontoise, France
| | - Yves Jacquot
- CiTCoM, CNRS UMR 8038, INSERM U1268, Faculty of Pharmacy of Paris, University Paris Cité, 75270 Paris Cedex 06, France
| | - Rodrigue Marquant
- Laboratoire des Biomolécules, Sorbonne Université, Ecole Normale Supérieure, PSL University, CNRS, 4 place Jussieu, 75252 Paris Cedex 05, France
| | - Thierry Brigaud
- CY Cergy Paris Université, CNRS, BioCIS, 95000 Cergy-Pontoise, France
| | - Claire Loison
- Institut Lumière Matière, University of Lyon, Université Claude Bernard Lyon 1, CNRS, F-69622 Villeurbanne, France
| | - Grégory Chaume
- Laboratoire des Biomolécules, Sorbonne Université, Ecole Normale Supérieure, PSL University, CNRS, 4 place Jussieu, 75252 Paris Cedex 05, France.,CY Cergy Paris Université, CNRS, BioCIS, 95000 Cergy-Pontoise, France
| | - Emeric Miclet
- Laboratoire des Biomolécules, Sorbonne Université, Ecole Normale Supérieure, PSL University, CNRS, 4 place Jussieu, 75252 Paris Cedex 05, France
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Acramel A, Jacquot Y. Deciphering of a Putative GPER Recognition Domain in ERα and ERα36. Front Endocrinol (Lausanne) 2022; 13:943343. [PMID: 35846328 PMCID: PMC9279910 DOI: 10.3389/fendo.2022.943343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 06/06/2022] [Indexed: 11/25/2022] Open
Affiliation(s)
- Alexandre Acramel
- CiTCoM laboratory, Centre National de la Recherche Scientifique (CNRS) Unité Mixte de Recherche (UMR) 8038, Institut National de la Santé et de la Recherche Médicale (INSERM) U1268, Faculty of Pharmacy of Paris, Université Paris Cité, Paris, France
- Department of Pharmacy, Institut Curie, Paris, France
| | - Yves Jacquot
- CiTCoM laboratory, Centre National de la Recherche Scientifique (CNRS) Unité Mixte de Recherche (UMR) 8038, Institut National de la Santé et de la Recherche Médicale (INSERM) U1268, Faculty of Pharmacy of Paris, Université Paris Cité, Paris, France
- *Correspondence: Yves Jacquot,
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Jacquot Y, Kampa M, Lindsey SH. Editorial: GPER: Control and Functions. Front Endocrinol (Lausanne) 2021; 12:794344. [PMID: 34912301 PMCID: PMC8666656 DOI: 10.3389/fendo.2021.794344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 10/22/2021] [Indexed: 11/13/2022] Open
Affiliation(s)
- Yves Jacquot
- CiTCoM, CNRS UMR 8038, INSERM U1268, Faculté de Pharmacie de Paris, Université de Paris, Paris, France
| | - Marilena Kampa
- Laboratory of Experimental Endocrinology, School of Medicine, University of Crete, Heraklion, Greece
| | - Sarah H. Lindsey
- Department of Pharmacology, Tulane University, New Orleans, LA, United States
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Jacquot Y, Kampa M, Lindsey SH. Editorial: GPER and Human Pathologies. Front Endocrinol (Lausanne) 2021; 12:794332. [PMID: 34858355 PMCID: PMC8631492 DOI: 10.3389/fendo.2021.794332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 10/15/2021] [Indexed: 11/13/2022] Open
Affiliation(s)
- Yves Jacquot
- CiTCoM, CNRS UMR 8038, INSERM U1268, Faculté de Pharmacie de Paris, Université de Paris, Paris, France
- *Correspondence: Yves Jacquot,
| | - Marilena Kampa
- Laboratory of Experimental Endocrinology, School of Medicine, University of Crete, Heraklion, Greece
| | - Sarah H. Lindsey
- Department of Pharmacology, Tulane University, New Orleans, LA, United States
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Mallet C, Boudieu L, Lamoine S, Coudert C, Jacquot Y, Eschalier A. The Antitumor Peptide ERα17p Exerts Anti-Hyperalgesic and Anti-Inflammatory Actions Through GPER in Mice. Front Endocrinol (Lausanne) 2021; 12:578250. [PMID: 33815268 PMCID: PMC8011567 DOI: 10.3389/fendo.2021.578250] [Citation(s) in RCA: 3] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 02/08/2021] [Indexed: 12/12/2022] Open
Abstract
Persistent inflammation and persistent pain are major medical, social and economic burdens. As such, related pharmacotherapy needs to be continuously improved. The peptide ERα17p, which originates from a part of the hinge region/AF2 domain of the human estrogen receptor α (ERα), exerts anti-proliferative effects in breast cancer cells through a mechanism involving the hepta-transmembrane G protein-coupled estrogen receptor (GPER). It is able to decrease the size of xenografted human breast tumors, in mice. As GPER has been reported to participate in pain and inflammation, we were interested in exploring the potential of ERα17p in this respect. We observed that the peptide promoted anti-hyperalgesic effects from 2.5 mg/kg in a chronic mice model of paw inflammation induced by the pro-inflammatory complete Freund's adjuvant (CFA). This action was abrogated by the specific GPER antagonist G-15, leading to the conclusion that a GPER-dependent mechanism was involved. A systemic administration of a Cy5-labeled version of the peptide allowed its detection in both, the spinal cord and brain. However, ERα17p-induced anti-hyperalgesia was detected at the supraspinal level, exclusively. In the second part of the study, we have assessed the anti-inflammatory action of ERα17p in mice using a carrageenan-evoked hind-paw inflammation model. A systemic administration of ERα17p at a dose of 2.5 mg/kg was responsible for reduced paw swelling. Overall, our work strongly suggests that GPER inverse agonists, including ERα17p, could be used to control hyperalgesia and inflammation.
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Affiliation(s)
- Christophe Mallet
- Université Clermont Auvergne, INSERM, NEURO-DOL Basics & Clinical Pharmacology of Pain, Clermont-Ferrand, France
- ANALGESIA Institute, Faculty of Medicine, Clermont-Ferrand, France
- *Correspondence: Christophe Mallet,
| | - Ludivine Boudieu
- Université Clermont Auvergne, INSERM, NEURO-DOL Basics & Clinical Pharmacology of Pain, Clermont-Ferrand, France
- ANALGESIA Institute, Faculty of Medicine, Clermont-Ferrand, France
| | - Sylvain Lamoine
- Université Clermont Auvergne, INSERM, NEURO-DOL Basics & Clinical Pharmacology of Pain, Clermont-Ferrand, France
- ANALGESIA Institute, Faculty of Medicine, Clermont-Ferrand, France
| | - Catherine Coudert
- Université Clermont Auvergne, INSERM, NEURO-DOL Basics & Clinical Pharmacology of Pain, Clermont-Ferrand, France
- ANALGESIA Institute, Faculty of Medicine, Clermont-Ferrand, France
| | - Yves Jacquot
- Université de Paris, Faculté de Pharmacie de Paris, CiTCoM, CNRS UMR 8038, INSERM U1268, Paris, France
| | - Alain Eschalier
- Université Clermont Auvergne, INSERM, NEURO-DOL Basics & Clinical Pharmacology of Pain, Clermont-Ferrand, France
- ANALGESIA Institute, Faculty of Medicine, Clermont-Ferrand, France
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de la Sierra-Gallay IL, Belnou M, Chambraud B, Genet M, van Tilbeurgh H, Aumont-Nicaise M, Desmadril M, Baulieu EE, Jacquot Y, Byrne C. Bioinspired Hybrid Fluorescent Ligands for the FK1 Domain of FKBP52. J Med Chem 2020; 63:10330-10338. [PMID: 32866001 DOI: 10.1021/acs.jmedchem.0c00825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The protein FKBP52 is a steroid hormone receptor coactivator likely involved in neurodegenerative disease. A series of small, water-soluble, bioinspired, pseudopeptidic fluorescent ligands for the FK1 domain of this protein are described. The design is such that engulfing of the ligand in the pocket of this domain is accompanied by hydrogen-bonding of the dansyl chromophore which functions as both an integral part of the ligand and a fluorescent reporter. Binding is concomitant with a significant wavelength shift and an enhancement of the ligand fluorescence signal. Excitation of FK1 domain native tryptophan residues in the presence of bound ligand results in Förster resonance energy transfer. Variation of key ligand residues within the short sequence was undertaken, and the interaction of the resulting library with the protein was measured by techniques including isothermal calorimetry analysis, fluorescence, and FRET quenching, and a range of Kd values were determined. Cocrystallization of a protein ligand complex at 2.30 Å resolution provided detailed information at the atomic scale, while also providing insight into native substrate binding.
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Affiliation(s)
- Inès Li de la Sierra-Gallay
- Institut de Biologie Intégrative de la Cellule (I2BC), CNRS UMR9198, Université Paris-Saclay, Université Paris-Sud, 91405 Orsay, France
| | - Mathilde Belnou
- Sorbonne Université, École normale supérieure, PSL University, CNRS, Laboratoire des biomolécules, LBM, 75005 Paris, France
| | | | - Melanie Genet
- Institut Baulieu, INSERM UMR 1195, Neuroprotection et Neurorégénération, Université Paris-Saclay, 94270Le Kremlin Bicêtre, France
| | - Herman van Tilbeurgh
- Institut de Biologie Intégrative de la Cellule (I2BC), CNRS UMR9198, Université Paris-Saclay, Université Paris-Sud, 91405 Orsay, France
| | - Magali Aumont-Nicaise
- Institut de Biologie Intégrative de la Cellule (I2BC), CNRS UMR9198, Université Paris-Saclay, Université Paris-Sud, 91405 Orsay, France
| | - Michel Desmadril
- Institut de Biologie Intégrative de la Cellule (I2BC), CNRS UMR9198, Université Paris-Saclay, Université Paris-Sud, 91405 Orsay, France
| | - Etienne-Emile Baulieu
- Institut Baulieu, INSERM UMR 1195, Neuroprotection et Neurorégénération, Université Paris-Saclay, 94270Le Kremlin Bicêtre, France
| | - Yves Jacquot
- Cibles Thérapeutiques et Conception de Médicaments (CiTCoM), CNRS UMR 8038, INSERM U1268, Faculté des Sciences Pharmaceutiques et Biologiques, Université Paris Descartes, 75270 Paris Cedex 06, France
| | - Cillian Byrne
- Sorbonne Université, École normale supérieure, PSL University, CNRS, Laboratoire des biomolécules, LBM, 75005 Paris, France.,Institut Baulieu, INSERM UMR 1195, Neuroprotection et Neurorégénération, Université Paris-Saclay, 94270Le Kremlin Bicêtre, France
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Grande F, Occhiuzzi MA, Lappano R, Cirillo F, Guzzi R, Garofalo A, Jacquot Y, Maggiolini M, Rizzuti B. Computational Approaches for the Discovery of GPER Targeting Compounds. Front Endocrinol (Lausanne) 2020; 11:517. [PMID: 32849301 PMCID: PMC7417359 DOI: 10.3389/fendo.2020.00517] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 06/26/2020] [Indexed: 12/12/2022] Open
Abstract
Estrogens exert a panel of biological activities mainly through the estrogen receptors α and β, which belong to the nuclear receptor superfamily. Diverse studies have shown that the G protein-coupled estrogen receptor 1 (GPER, previously known as GPR30) also mediates the multifaceted effects of estrogens in numerous pathophysiological events, including neurodegenerative, immune, metabolic, and cardiovascular disorders and the progression of different types of cancer. In particular, GPER is implicated in hormone-sensitive tumors, albeit diverse issues remain to be deeply investigated. As such, this receptor may represent an appealing target for therapeutics in different diseases. The yet unavailable complete GPER crystallographic structure, and its relatively low sequence similarity with the other members of the G protein-coupled receptor (GPCR) family, hamper the possibility to discover compounds able to modulate GPER activity. Consequently, a reliable molecular model of this receptor is required for the design of suitable ligands. To date, convergent approaches involving structure-based drug design and virtual ligand screening have led to the identification of several GPER selective ligands, thus providing important information regarding its mode of action and function. In this survey, we summarize results obtained through computer-aided techniques devoted to the assessment of GPER ligands toward their usefulness in innovative treatments of different diseases.
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Affiliation(s)
- Fedora Grande
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Maria A. Occhiuzzi
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Rosamaria Lappano
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Francesca Cirillo
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
- Department of Physics, University of Calabria, Rende, Italy
| | - Rita Guzzi
- Department of Physics, University of Calabria, Rende, Italy
- CNR-NANOTEC, Licryl-UOS Cosenza and CEMIF.Cal, Department of Physics, University of Calabria, Rende, Italy
| | - Antonio Garofalo
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Yves Jacquot
- Cibles Thérapeutiques et Conception de Médicaments (CiTCoM), CNRS UMR 8038, INSERM U1268, Faculté de Pharmacie de Paris, Université de Paris, Paris, France
| | - Marcello Maggiolini
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Bruno Rizzuti
- CNR-NANOTEC, Licryl-UOS Cosenza and CEMIF.Cal, Department of Physics, University of Calabria, Rende, Italy
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Lappano R, Mallet C, Rizzuti B, Grande F, Galli GR, Byrne C, Broutin I, Boudieu L, Eschalier A, Jacquot Y, Maggiolini M. The Peptide ERα17p Is a GPER Inverse Agonist that Exerts Antiproliferative Effects in Breast Cancer Cells. Cells 2019; 8:cells8060590. [PMID: 31207943 PMCID: PMC6627388 DOI: 10.3390/cells8060590] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [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] [Received: 06/04/2019] [Accepted: 06/13/2019] [Indexed: 12/18/2022] Open
Abstract
The inhibition of the G protein-coupled estrogen receptor (GPER) offers promising perspectives for the treatment of breast tumors. A peptide corresponding to part of the hinge region/AF2 domain of the human estrogen receptor α (ERα17p, residues 295–311) exerts anti-proliferative effects in various breast cancer cells including those used as triple negative breast cancer (TNBC) models. As preliminary investigations have evoked a role for the GPER in the mechanism of action of this peptide, we focused our studies on this protein using SkBr3 breast cancer cells, which are ideal for GPER evaluation. ERα17p inhibits cell growth by targeting membrane signaling. Identified as a GPER inverse agonist, it co-localizes with GPER and induces the proteasome-dependent downregulation of GPER. It also decreases the level of pEGFR (phosphorylation of epidermal growth factor receptor), pERK1/2 (phosphorylation of extracellular signal-regulated kinase), and c-fos. ERα17p is rapidly distributed in mice after intra-peritoneal injection and is found primarily in the mammary glands. The N-terminal PLMI motif, which presents analogies with the GPER antagonist PBX1, reproduces the effect of the whole ERα17p. Thus, this motif seems to direct the action of the entire peptide, as highlighted by docking and molecular dynamics studies. Consequently, the tetrapeptide PLMI, which can be claimed as the first peptidic GPER disruptor, could open new avenues for specific GPER modulators.
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Affiliation(s)
- Rosamaria Lappano
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy.
| | - Christophe Mallet
- NEURO-DOL Basics & Clinical Pharmacology of Pain, INSERM, CHU, Université Clermont Auvergne, F-63000 Clermont-Ferrand, France.
- ANALGESIA Institute, Université Clermont Auvergne, F-63000 Clermont-Ferrand, France.
| | - Bruno Rizzuti
- CNR-NANOTEC, Licryl-UOS Cosenza and CEMIF.Cal, Department of Physics, University of Calabria, 87036 Rende, Italy.
| | - Fedora Grande
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy.
| | - Giulia Raffaella Galli
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy.
| | - Cillian Byrne
- Laboratoire des Biomolécules (LBM), CNRS-UMR 7203, Sorbonne University, Ecole Normale Supérieure, 75252 Paris Cedex 05, France.
| | - Isabelle Broutin
- Cibles Thérapeutiques et Conception de Médicaments (CiTCoM), CNRS-UMR 8038, Faculté des Sciences Pharmaceutiques et Biologiques, Université Paris Descartes, 75270 Paris Cedex 06, France.
| | - Ludivine Boudieu
- NEURO-DOL Basics & Clinical Pharmacology of Pain, INSERM, CHU, Université Clermont Auvergne, F-63000 Clermont-Ferrand, France.
- ANALGESIA Institute, Université Clermont Auvergne, F-63000 Clermont-Ferrand, France.
| | - Alain Eschalier
- NEURO-DOL Basics & Clinical Pharmacology of Pain, INSERM, CHU, Université Clermont Auvergne, F-63000 Clermont-Ferrand, France.
- ANALGESIA Institute, Université Clermont Auvergne, F-63000 Clermont-Ferrand, France.
| | - Yves Jacquot
- Laboratoire des Biomolécules (LBM), CNRS-UMR 7203, Sorbonne University, Ecole Normale Supérieure, 75252 Paris Cedex 05, France.
| | - Marcello Maggiolini
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy.
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Byrne C, Belnou M, Baulieu E, Lequin O, Jacquot Y. Electronic circular dichroism and nuclear magnetic resonance studies of peptides derived from the FKBP52‐interacting β‐turn of the hERα ligand‐binding domain. Pept Sci (Hoboken) 2019. [DOI: 10.1002/pep2.24113] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Cillian Byrne
- Sorbonne Université, Ecole Normale SupérieurePSL University, CNRS UMR 7203, Laboratoire des Biomolécules Paris France
- Institut Baulieu, Université Paris‐SaclayINSERM UMR 1195, Neuroprotection and Neuroregeneration Le Kremlin Bicêtre France
| | - Mathilde Belnou
- Sorbonne Université, Ecole Normale SupérieurePSL University, CNRS UMR 7203, Laboratoire des Biomolécules Paris France
| | - Etienne‐Emile Baulieu
- Institut Baulieu, Université Paris‐SaclayINSERM UMR 1195, Neuroprotection and Neuroregeneration Le Kremlin Bicêtre France
| | - Olivier Lequin
- Sorbonne Université, Ecole Normale SupérieurePSL University, CNRS UMR 7203, Laboratoire des Biomolécules Paris France
| | - Yves Jacquot
- Sorbonne Université, Ecole Normale SupérieurePSL University, CNRS UMR 7203, Laboratoire des Biomolécules Paris France
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13
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Jacquot Y, Spaggiari D, Schappler J, Lesniewska E, Rudaz S, Leclercq G. ERE-dependent transcription and cell proliferation: Independency of these two processes mediated by the introduction of a sulfone function into the weak estrogen estrothiazine. Eur J Pharm Sci 2017; 109:169-181. [PMID: 28754571 DOI: 10.1016/j.ejps.2017.07.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 07/18/2017] [Accepted: 07/24/2017] [Indexed: 02/07/2023]
Abstract
The synthetic coumestrol derivative 6,12-dihydro-3-methoxy-1-benzopyrano[3,4-b][1,4]benzothiazin-6-one (estrothiazine, ESTZ) has been identified as a weak estrogen receptor α (ERα) ligand unable to compete with tritiated estradiol. The biological activity of this compound, supported by a methoxy group in position 3, seems mainly to result from its capacity to activate ERα dimerization without any participation of coactivators. In support of this view and referring to conventional estrogens, an ESTZ metabolism study conducted with hepatic human microsomes failed to provide any argument in favour of an estrogenic activity dependent on a metabolic conversion of the compound into hydroxylated metabolites with strong receptor activation ability. Interestingly, we failed to detect any oxidation of the sulfur atom of the compound. In the light of pharmacological literature data concerning sulfonylation, we assessed ERα-mediated activities generated by two sulfonylated ESTZ derivatives in which the methoxy group that plays a key role in its mechanism of action was maintained or removed. Sulfonylated ESTZ, even in its demethoxylated form, induced ERE-mediated transcriptions in MCF-7 breast cancer cells, without affecting the ERα turnover rate. In contrast to ESTZ, this compound failed to enhance the proliferation of ERα-positive breast cancer cells, suggesting that its sulfone function confers upon the receptor a capacity to elicit some of the known characteristics associated with estrogenic responses. Moreover, we demonstrated that this sulfone may contribute to ERα dimerization without any requirement of the methoxy group. Nevertheless, it seems to cooperate with this group, as reflected by a weak ability of the sulfonylated form of ESTZ to compete with tritiated estradiol for ERα-binding. Assessment of the docking of this compound within the ligand-binding domain of the receptor by molecular dynamics provided an explanation for this observation since the sulfone is engulfed in a small hydrophobic pocket involving the residues Leu-346, Leu-349, Ala-350 and Leu-384, also known to recruit coactivators. This work not only reports the sulfone functional group as a pharmacophore for estrogenic activity, but also opens new perspectives for the development of estrogenic molecules with therapeutic purpose and devoid of proliferative side effects.
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Affiliation(s)
- Yves Jacquot
- Sorbonne University - UPMC Univ Paris 06, Ecole Normale Supérieure, PSL Research University, Département de Chimie, CNRS UMR 7203 LBM, 4 Place Jussieu, 75005 Paris, France.
| | - Dany Spaggiari
- Section des Sciences Pharmaceutiques (EPGL), University of Geneva, University of Lausanne, rue Michel Servet 1, 1211 Geneva 4, Switzerland
| | - Julie Schappler
- Section des Sciences Pharmaceutiques (EPGL), University of Geneva, University of Lausanne, rue Michel Servet 1, 1211 Geneva 4, Switzerland
| | - Eric Lesniewska
- ICB, CNRS UMR 6303, University de Bourgogne Franche-Comté, 9, avenue Savary, 21078 Dijon, France
| | - Serge Rudaz
- Section des Sciences Pharmaceutiques (EPGL), University of Geneva, University of Lausanne, rue Michel Servet 1, 1211 Geneva 4, Switzerland
| | - Guy Leclercq
- Laboratory J.C. Heuson de Cancérologie Mammaire, Institut Jules Bordet, 1, rue Héger Bordet, Brussels 1000, Belgium.
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14
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Byrne C, Henen MA, Belnou M, Cantrelle FX, Kamah A, Qi H, Giustiniani J, Chambraud B, Baulieu EE, Lippens G, Landrieu I, Jacquot Y. A β-Turn Motif in the Steroid Hormone Receptor’s Ligand-Binding Domains Interacts with the Peptidyl-prolyl Isomerase (PPIase) Catalytic Site of the Immunophilin FKBP52. Biochemistry 2016; 55:5366-76. [DOI: 10.1021/acs.biochem.6b00506] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Cillian Byrne
- Sorbonne Universités, UPMC Univ Paris 06, Ecole Normale Supérieure,
PSL Research University, CNRS UMR 7203, Laboratoire des Biomolécules, 4, place Jussieu, 75252 Paris Cedex 05, France
- Institut Baulieu, INSERM UMR 1195, Neuroprotection
and Neuroregeneration,
Université Paris-Saclay, Bât. Gregory Pincus, 80, rue du Général Leclerc, 94276 Le Kremlin Bicêtre Cedex, France
| | - Morkos A. Henen
- CNRS, UMR 8576,
Glycobiologie Structurale et Fonctionnelle, Université des
Sciences et Technologies de Lille 1, 59655 Villeneuve d’Ascq Cedex, France
| | - Mathilde Belnou
- Sorbonne Universités, UPMC Univ Paris 06, Ecole Normale Supérieure,
PSL Research University, CNRS UMR 7203, Laboratoire des Biomolécules, 4, place Jussieu, 75252 Paris Cedex 05, France
| | - François-Xavier Cantrelle
- CNRS, UMR 8576,
Glycobiologie Structurale et Fonctionnelle, Université des
Sciences et Technologies de Lille 1, 59655 Villeneuve d’Ascq Cedex, France
| | - Amina Kamah
- CNRS, UMR 8576,
Glycobiologie Structurale et Fonctionnelle, Université des
Sciences et Technologies de Lille 1, 59655 Villeneuve d’Ascq Cedex, France
| | - Haoling Qi
- CNRS, UMR 8576,
Glycobiologie Structurale et Fonctionnelle, Université des
Sciences et Technologies de Lille 1, 59655 Villeneuve d’Ascq Cedex, France
| | - Julien Giustiniani
- Institut Baulieu, INSERM UMR 1195, Neuroprotection
and Neuroregeneration,
Université Paris-Saclay, Bât. Gregory Pincus, 80, rue du Général Leclerc, 94276 Le Kremlin Bicêtre Cedex, France
| | - Béatrice Chambraud
- Institut Baulieu, INSERM UMR 1195, Neuroprotection
and Neuroregeneration,
Université Paris-Saclay, Bât. Gregory Pincus, 80, rue du Général Leclerc, 94276 Le Kremlin Bicêtre Cedex, France
| | - Etienne-Emile Baulieu
- Institut Baulieu, INSERM UMR 1195, Neuroprotection
and Neuroregeneration,
Université Paris-Saclay, Bât. Gregory Pincus, 80, rue du Général Leclerc, 94276 Le Kremlin Bicêtre Cedex, France
| | - Guy Lippens
- CNRS, UMR 8576,
Glycobiologie Structurale et Fonctionnelle, Université des
Sciences et Technologies de Lille 1, 59655 Villeneuve d’Ascq Cedex, France
- LISBP,
Université
de Toulouse, CNRS, INRA, INSA, Toulouse, France
| | - Isabelle Landrieu
- CNRS, UMR 8576,
Glycobiologie Structurale et Fonctionnelle, Université des
Sciences et Technologies de Lille 1, 59655 Villeneuve d’Ascq Cedex, France
| | - Yves Jacquot
- Sorbonne Universités, UPMC Univ Paris 06, Ecole Normale Supérieure,
PSL Research University, CNRS UMR 7203, Laboratoire des Biomolécules, 4, place Jussieu, 75252 Paris Cedex 05, France
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15
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Leclercq G, Laïos I, Elie-Caille C, Leiber D, Laurent G, Lesniewska E, Tanfin Z, Jacquot Y. ERα dimerization: a key factor for the weak estrogenic activity of an ERα modulator unable to compete with estradiol in binding assays. J Recept Signal Transduct Res 2016; 37:149-166. [PMID: 27400858 DOI: 10.1080/10799893.2016.1203940] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Estrothiazine (ESTZ) is a weak estrogen sharing structural similarities with coumestrol. ESTZ failed to compete with [3H]17β-estradiol ([3H]17β-E2) for binding to the estrogen receptor α (ERα), questioning its ability to interact with the receptor. However, detection by atomic force spectroscopy (AFS) of an ESTZ-induced ERα dimerization has eliminated any remaining doubts. The effect of the compound on the proliferation of ERα-positive and negative breast cancer cells confirmed the requirement of the receptor. The efficiency of ESTZ in MCF-7 cells was weak without any potency to modify the proliferation profile of estradiol and coumestrol. Growth enhancement was associated with a proteasomal degradation of ERα without substantial recruitment of LxxLL coactivators. This may be related to an unusual delay between the acquisition by the receptor of an ERE-binding capacity and the subsequent estrogen-dependent transcription. A complementary ability to enhance TPA-induced AP-1 transcription was observed, even at concentrations insufficient to activate the ERα, suggesting a partly independent mechanism. ESTZ also rapidly and transiently activated ERK1/2 likely through membrane estrogenic pathways provoking a reorganization of the actin network. Finally, the systematic absence of biological responses with an ESTZ derivative unable to induce ERα dimerization stresses the importance of this step in the action of the compound, as reported for conventional estrogens. In view of the existence of many other ERα modulators (endocrine disruptors such as, for example, pesticides, environmental contaminants or phytoestrogens) with extremely weak or similar apparent lack of binding ability, our work may appear as pilot investigation for assessing their mechanism of action.
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Affiliation(s)
- Guy Leclercq
- a Laboratoire J.-C. Heuson de Cancérologie Mammaire , Université Libre de Bruxelles (U.L.B.), Institut Jules Bordet , Brussels , Belgium
| | - Ioanna Laïos
- a Laboratoire J.-C. Heuson de Cancérologie Mammaire , Université Libre de Bruxelles (U.L.B.), Institut Jules Bordet , Brussels , Belgium
| | - Céline Elie-Caille
- b Institut FEMTO-ST, CNRS UMR 6174, Université de Bourgogne Franche-Comté , Besançon , France
| | - Denis Leiber
- c Laboratoire Signalisation et Régulations Cellulaires , Institut de Biochimie et de Biologie Moléculaire et Cellulaire, CNRS UMR 8619, Université Paris-Sud , Orsay Cedex , France.,d INSERM U1063, Stress Oxydant et Pathologies Métaboliques, Université d'Angers , Angers , France
| | - Guy Laurent
- e Service d'Histologie et de Cytologie Expérimentale, Faculté de Médecine et de Pharmacie , Université de Mons-Hainaut , Mons , Belgium
| | - Eric Lesniewska
- f ICB, CNRS UMR 6303, Université de Bourgogne Franche-Comté , Dijon , France
| | - Zahra Tanfin
- c Laboratoire Signalisation et Régulations Cellulaires , Institut de Biochimie et de Biologie Moléculaire et Cellulaire, CNRS UMR 8619, Université Paris-Sud , Orsay Cedex , France
| | - Yves Jacquot
- g Département de Chimie, CNRS UMR 7203 LBM , Sorbonne Universités - UPMC Univ Paris 06, Ecole Normale Supérieure, PSL Research University , Paris , France
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16
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Kamah A, Cantrelle FX, Huvent I, Giustiniani J, Guillemeau K, Byrne C, Jacquot Y, Landrieu I, Baulieu EE, Smet C, Chambraud B, Lippens G. Isomerization and Oligomerization of Truncated and Mutated Tau Forms by FKBP52 are Independent Processes. J Mol Biol 2016; 428:1080-1090. [PMID: 26903089 DOI: 10.1016/j.jmb.2016.02.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 12/23/2015] [Accepted: 02/13/2016] [Indexed: 10/22/2022]
Abstract
The aggregation of the neuronal Tau protein is one molecular hallmark of Alzheimer's disease and other related tauopathies, but the precise molecular mechanisms of the aggregation process remain unclear. The FK506 binding protein FKBP52 is able to induce oligomers in the pathogenic Tau P301L mutant and in a truncated form of the wild-type human Tau protein. Here, we investigate whether FKBP52's capacity to induce Tau oligomers depends on its prolyl cis/trans isomerase activity. We find that FKBP52 indeed can isomerize selected prolyl bonds in the different Tau proteins, and that this activity is carried solely by its first FK506 binding domain. Its capacity to oligomerize Tau is, however, not linked to this peptidyl-prolyl isomerase activity. In addition, we identified a novel molecular interaction implying the PHF6 peptide of Tau and the FK1/FK2 domains of FKBP52 independent of FK506 binding; these data point toward a non-catalytic molecular interaction that might govern the effect of FKBP52 on Tau.
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Affiliation(s)
- A Kamah
- University of Lille, CNRS, UMR 8576, UGSF, Unité de Glycobiologie Structurale et Fonctionnelle, F 59 000 Lille, France
| | - F X Cantrelle
- University of Lille, CNRS, UMR 8576, UGSF, Unité de Glycobiologie Structurale et Fonctionnelle, F 59 000 Lille, France
| | - I Huvent
- University of Lille, CNRS, UMR 8576, UGSF, Unité de Glycobiologie Structurale et Fonctionnelle, F 59 000 Lille, France
| | - J Giustiniani
- Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1195, Université Paris XI, Le Kremlin Bicêtre, France
| | - K Guillemeau
- Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1195, Université Paris XI, Le Kremlin Bicêtre, France
| | - C Byrne
- Sorbonne Universités, UPMC Univ Paris06, Ecole Normale Supérieure-PSL Research University, CNRS UMR 7203, Laboratoire des Biomolécules, 4, Place Jussieu, 75252 Paris Cedex 05, France
| | - Y Jacquot
- Sorbonne Universités, UPMC Univ Paris06, Ecole Normale Supérieure-PSL Research University, CNRS UMR 7203, Laboratoire des Biomolécules, 4, Place Jussieu, 75252 Paris Cedex 05, France
| | - I Landrieu
- University of Lille, CNRS, UMR 8576, UGSF, Unité de Glycobiologie Structurale et Fonctionnelle, F 59 000 Lille, France
| | - E E Baulieu
- Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1195, Université Paris XI, Le Kremlin Bicêtre, France
| | - C Smet
- University of Lille, CNRS, UMR 8576, UGSF, Unité de Glycobiologie Structurale et Fonctionnelle, F 59 000 Lille, France
| | - B Chambraud
- Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1195, Université Paris XI, Le Kremlin Bicêtre, France
| | - G Lippens
- University of Lille, CNRS, UMR 8576, UGSF, Unité de Glycobiologie Structurale et Fonctionnelle, F 59 000 Lille, France; CNRS, INSA-Université Paul Sabatier, LISBP UMR5504, Toulouse, France.
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17
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Gandhi NS, Landrieu I, Byrne C, Kukic P, Amniai L, Cantrelle FX, Wieruszeski JM, Mancera RL, Jacquot Y, Lippens G. A Phosphorylation-Induced Turn Defines the Alzheimer’s Disease AT8 Antibody Epitope on the Tau Protein. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201501898] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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18
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Gandhi NS, Landrieu I, Byrne C, Kukic P, Amniai L, Cantrelle FX, Wieruszeski JM, Mancera RL, Jacquot Y, Lippens G. A Phosphorylation-Induced Turn Defines the Alzheimer's Disease AT8 Antibody Epitope on the Tau Protein. Angew Chem Int Ed Engl 2015; 54:6819-23. [PMID: 25881502 DOI: 10.1002/anie.201501898] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Indexed: 11/08/2022]
Abstract
Post mortem biochemical staging of Alzheimer's disease is currently based on immunochemical analysis of brain slices with the AT8 antibody. The epitope of AT8 is described around the pSer202/pThr205 region of the hyperphosphorylated form of the neuronal protein tau. In this study, NMR spectroscopy was used to precisely map the AT8 epitope on phosphorylated tau, and derive its defining structural features by a combination of NMR analyses and molecular dynamics. A particular turn conformation is stabilized by a hydrogen bond of the phosphorylated Thr205 residue to the amide proton of Gly207, and is further stabilized by the two Arg residues opposing the pSer202/pThr205.
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Affiliation(s)
- Neha S Gandhi
- School of Biomedical Sciences, CHIRI Biosciences, Curtin University, Perth (Australia)
| | | | - Cillian Byrne
- CNRS UMR 7203, Université Pierre et Marie Curie, Ecole Normale Supérieure, Paris (France).,Institut Baulieu, Kremlin-Bicêtre (France)
| | - Predrag Kukic
- Department of Chemistry, Cambridge University, Cambridge (UK)
| | | | | | | | - Ricardo L Mancera
- School of Biomedical Sciences, CHIRI Biosciences, Curtin University, Perth (Australia)
| | - Yves Jacquot
- CNRS UMR 7203, Université Pierre et Marie Curie, Ecole Normale Supérieure, Paris (France)
| | - Guy Lippens
- CNRS UMR 8576, University of Lille 1 (France).
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19
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Ruggeri FS, Byrne C, Khemtemourian L, Ducouret G, Dietler G, Jacquot Y. Concentration-dependent and surface-assisted self-assembly properties of a bioactive estrogen receptor α-derived peptide. J Pept Sci 2014; 21:95-104. [PMID: 25530026 DOI: 10.1002/psc.2730] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Revised: 11/25/2014] [Accepted: 11/28/2014] [Indexed: 11/10/2022]
Abstract
We have synthesized a 17-mer peptide (ERα17p) that is issued from the hinge region of the estrogen receptor α and which activates the proliferation of breast carcinoma cells in steroid-deprived conditions. In the present paper, we show that at a concentration of ~50 μM, it rapidly forms amyloid-like fibrils with the assistance of electrostatic interactions and that at higher concentrations, it spontaneously forms a hydrogel. By using biophysical, spectral and rheological techniques, we have explored the structural, biophysical and mechanical characteristics of ERα17p with respect to fibril formation and gelation.
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Affiliation(s)
- Francesco Simone Ruggeri
- Laboratoire de Physique de la Matière Vivante, Institut de Physique des Systèmes Biologiques, Ecole Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland
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20
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Leclercq G, Jacquot Y. Interactions of isoflavones and other plant derived estrogens with estrogen receptors for prevention and treatment of breast cancer-considerations concerning related efficacy and safety. J Steroid Biochem Mol Biol 2014; 139:237-44. [PMID: 23274118 DOI: 10.1016/j.jsbmb.2012.12.010] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [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: 09/19/2012] [Revised: 12/07/2012] [Accepted: 12/18/2012] [Indexed: 12/20/2022]
Abstract
Phytoestrogens are natural endocrine disruptors that interfere with estrogenic pathways. They insert directly within the hormone-binding domain of ERα and β, with a preference for the β isoform of which the concentration predominates in the normal mammary epithelium. Since ERβ antagonizes the growth promoting effect of ERα, which is mainly expressed in estrogen-sensitive tumor cells, a potential protective action against breast cancer incidence has been ascribed to phytoestrogens. The fact that Asian women living in far-east countries who consume isoflavone-rich food are less subjected to breast cancer emergence than their congeners in the USA as well as Caucasian women has been advocated to justify such a concept. Overview of data concerning the mechanism of action phytoestrogens reveals that such a view is an oversimplification: Such compounds interfere with a huge panel of regulatory proteins, giving rise to both promoting and antagonizing carcinogenic effects. Moreover, various physiological and pathological factors able to amplify these effects are not often sufficiently taken into account, which increases the difficulty to interpret data. Nevertheless, this overview of data established that chemical structures and concentrations modulate such effects: at the micromolar level, isoflavones activate ERα-mediated transcription and breast cancer cell proliferation while flavones fail to induce any significant promoting effects. At higher doses, both classes of compounds may display an antitumor activity. Reasons for such distinct behaviors as well as their potential impact in therapeutic applications are analyzed here. Ability of isoflavones and flavones to antagonize the association of calmodulin to ERα, which is required for its enhanced transcriptional activity is evoked to justify the antitumor activity ascribed to some flavones. Finally, a suspicion that peculiar classes of phytoestrogens may adopt a SERM-like conformation is addressed in a context of selection and synthesis of compounds with non-equivocal therapeutic value. This article is part of a Special Issue entitled "Phytoestrogens".
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Affiliation(s)
- Guy Leclercq
- Laboratoire J.-C. Heuson de Cancérologie Mammaire, Université Libre de Bruxelles (U.L.B.), Institut Jules Bordet, 1, rue Héger Bordet, Brussels, B-1000, Belgium.
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21
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Byrne C, Miclet E, Broutin I, Gallo D, Pelekanou V, Kampa M, Castanas E, Leclercq G, Jacquot Y. Identification of polyproline II regions derived from the proline-rich nuclear receptor coactivators PNRC and PNRC2: new insights for ERα coactivator interactions. Chirality 2013; 25:628-42. [PMID: 23925889 DOI: 10.1002/chir.22188] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Accepted: 04/12/2013] [Indexed: 11/07/2022]
Abstract
Protein-protein interactions are crucial for signal transductions required for cell differentiation and proliferation. Their modulation is therefore key to the development of therapeutic alternatives, particularly in the context of cancer. According to literature data, the polyproline-rich nuclear receptor coactivators PNRC and PNRC2 interact with estrogen receptor (ERα) through their PxxP SH3-binding motifs. In a search to identify the molecular features governing this interaction, we explored using electronic circular dichroism (ECD) spectroscopy and molecular dynamics (MD) calculations, the capacity of a range of putative biologically active peptides derived from these proteins and containing this PxxP motif(s) to form polyproline II (PPII) domains. An additional more exhaustive structural study on a lead PPII peptide was also performed using 2D nuclear magnetic resonance (NMR) spectroscopy. With the exception of one of all the investigated peptides (PNRC-D), binding assays failed to detect any affinity for Grb2 SH3 domains, suggesting that PPII motifs issued from Grb2 antagonists have a binding mode distinct from those derived from Grb2 agonists. Instead, the peptides revealed a competitive binding ability against a synthetic peptide (ERα17p) with a putative PPII-cognate domain located within a coregulator recruitment region of ERα (AF-2 site). Our work, which constitutes the first structure-related interaction study concerning PNRC and PNRC2, supports not only the existence of PxxP-induced PPII sequences in these coregulators, but also confirms the presence of a PPII recognition site in the AF-2 of the steroid receptor ERα, a region important for transcription regulation.
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Affiliation(s)
- C Byrne
- Laboratoire des BioMolécules (LBM), CNRS - UMR 7203, Ecole Normale Supérieure / Université Pierre et Marie Curie 24, rue Lhomond, 75231, Paris Cedex 05, France; Fondation Pierre-Gilles de Gennes pour la Recherche, 29, rue d'Ulm, 75005, Paris, France
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22
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Frankiewicz L, Betti C, Guillemyn K, Tourwé D, Jacquot Y, Ballet S. Stabilisation of a short α
-helical VIP fragment by side chain to side chain cyclisation: a comparison of common cyclisation motifs by circular dichroism. J Pept Sci 2013; 19:423-32. [DOI: 10.1002/psc.2515] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Revised: 03/15/2013] [Accepted: 04/08/2013] [Indexed: 12/11/2022]
Affiliation(s)
- Lukasz Frankiewicz
- Department of Organic Chemistry; Vrije Universiteit Brussel; Pleinlaan 2 B-1050 Brussels Belgium
| | - Cecilia Betti
- Department of Organic Chemistry; Vrije Universiteit Brussel; Pleinlaan 2 B-1050 Brussels Belgium
| | - Karel Guillemyn
- Department of Organic Chemistry; Vrije Universiteit Brussel; Pleinlaan 2 B-1050 Brussels Belgium
| | - Dirk Tourwé
- Department of Organic Chemistry; Vrije Universiteit Brussel; Pleinlaan 2 B-1050 Brussels Belgium
| | - Yves Jacquot
- Laboratory of the BioMolécules (LBM), Department of Chemistry, CNRS - UMR 7203; Ecole Normale Supérieure/Université Pierre et Marie Curie Paris 6; 24, rue Lhomond 75231 Paris Cedex 05 France
| | - Steven Ballet
- Department of Organic Chemistry; Vrije Universiteit Brussel; Pleinlaan 2 B-1050 Brussels Belgium
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23
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Notas G, Kampa M, Pelekanou V, Troullinaki M, Jacquot Y, Leclercq G, Castanas E. Whole transcriptome analysis of the ERα synthetic fragment P295-T311 (ERα17p) identifies specific ERα-isoform (ERα, ERα36)-dependent and -independent actions in breast cancer cells. Mol Oncol 2013; 7:595-610. [PMID: 23474223 DOI: 10.1016/j.molonc.2013.02.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2012] [Revised: 02/06/2013] [Accepted: 02/07/2013] [Indexed: 02/07/2023] Open
Abstract
ERα17p is a peptide corresponding to the sequence P295LMIKRSKKNSLALSLT311 of the estrogen receptor alpha (ERα) and initially found to interfere with ERα-related calmodulin binding. ERα17p was subsequently found to elicit estrogenic responses in E2-deprived ERα-positive breast cancer cells, increasing proliferation and ERE-dependent gene transcription. Surprisingly, in E2-supplemented media, ERα17p-induced apoptosis and modified the actin network, influencing cell motility. Here, we report that ERα17p internalizes in breast cancer cells (T47D, MDA-MB-231, SKBR3) and induces a massive early (3 h) transcriptional activity. Remarkably, about 75% of significantly modified transcripts were also modified by E2, confirming the pro-estrogenic profile of ERα17p. The different ER spectra of the used cell lines allowed us to identify a specific ERα17p signature related to ERα as well as its variant ERα36. With respect to ERα, the peptide activates nuclear (cell cycle, cell proliferation, nucleic acid and protein synthesis) and extranuclear signaling pathways. In contrast, through ERα36, it mainly triggers inhibitory actions on inflammation. This is the first work reporting a detailed ERα36-specific transcriptional signature. In addition, we report that ERα17p-induced transcripts related to apoptosis and actin modifying effects of the peptide are independent from its estrogen receptor(s)-related actions. We discuss our findings in view of the potential use of ERα17p as a selective peptidomimetic estrogen receptor modulator (PERM).
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Affiliation(s)
- George Notas
- Laboratory of Experimental Endocrinology, University of Crete, School of Medicine, P.O. Box 2208, Heraklion 71003, Greece
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Bourgoin-Voillard S, Fournier F, Afonso C, Zins EL, Jacquot Y, Pèpe C, Leclercq G, Tabet JC. Electronic effects of 11β substituted 17β-estradiol derivatives and instrumental effects on the relative gas phase acidity. J Am Soc Mass Spectrom 2012; 23:2167-2177. [PMID: 23055074 DOI: 10.1007/s13361-012-0486-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Revised: 08/05/2012] [Accepted: 08/06/2012] [Indexed: 06/01/2023]
Abstract
Numerous studies have highlighted the role of the proton donor characteristics of the phenol group of 17β-estradiol (E(2)) in its association with the estrogen receptor alpha (ERα). Since the substitutions at position C((11)) have been reported to modulate this association, we hypothesized that such substitutions may modify the phenol acidity. Hence, phenol gas-phase acidity of nine C((11))-substituted E(2)-derivatives were evaluated using the extended Cooks' kinetic method, which is a method widely used to determine thermochemical properties by mass spectrometry. To enhance accuracy in data collection we recorded data from several instruments, including quadrupole ion trap, triple quadrupole, and hybrid QqTOF. Indeed, we report for the first time the use of the QqTOF instrument to provide a novel means to improve data accuracy by giving access to an intermediate effective temperature range. All experimental gas-phase acidity values were supported by theoretical calculations. Our results confirmed the ability of distant substituents at C((11)) to modulate the phenol acidity through electrostatic interactions, electron withdrawing inductive effects, and mesomeric effects. However, no relationship was found between the phenol gas-phase acidity of investigated steroids and their binding affinity for ERα assessed in solution. Thus, our results highlight that the intrinsic properties of the hormone do not influence sufficiently the stabilization of the hormone/ERα complex. It is more likely that such stabilization would be more related to factors depending on the environment within the binding pocket such as hydrophobic, steric as well as direct intermolecular electrostatic effects between ERα residues and the substituted steroidal estrogens.
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Affiliation(s)
- Sandrine Bourgoin-Voillard
- Equipe de Spectrométrie de masse, Institut Parisien de Chimie Moléculaire, UMR 7201, Université Pierre et Marie Curie-Paris 6, 4 Place Jussieu, 75252, Paris Cedex 05, France
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25
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Byrne C, Khemtémourian L, Pelekanou V, Kampa M, Leclercq G, Sagan S, Castanas E, Burlina F, Jacquot Y. ERα17p, a peptide reproducing the hinge region of the estrogen receptor α associates to biological membranes: A biophysical approach. Steroids 2012; 77:979-87. [PMID: 22426414 DOI: 10.1016/j.steroids.2012.02.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2011] [Revised: 12/22/2011] [Accepted: 02/29/2012] [Indexed: 10/28/2022]
Abstract
Recently, we identified a peptide (ERα17p, P(295)LMIKRSKKNSLALSLT(311)) that corresponds to the 295-311 sequence of the estrogen receptor α (ERα, hinge region) and which exerts a panel of pharmacological effects in breast cancer cells. Remarkably, these effects can result from the interaction of ERα17p with the plasma membrane. Herein, we show that ERα17p adopts a β-sheet secondary structure when in contact with anionic phospholipids and that it is engulfed within the lipid bilayer. While ERα17p increases the fluidity of membrane mimics, it weakly internalizes in living cells. In light of the above, one may evoke one important role of the 295-311 region of the ERα: the corresponding peptide could be secreted/delivered to the extracellular medium to interact with neighboring cells, both intracellularly and at the membrane level. Finally, the 295-311 region of ERα being in proximity to the cystein-447, the palmitoylation site of the ERα raises the question of its involvement in the interaction/stabilization of the protein with the membrane.
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Affiliation(s)
- Cillian Byrne
- Laboratoire des BioMolécules, CNRS-UMR 7203, 24 rue Lhomond, Ecole Normale Supérieure/UPMC Univ Paris 06, 75253 Paris Cedex 05, France
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Jacquot Y, Byrne C, Xicluna A, Leclercq G. Synthesis, structure, and estrogenic activity of 2- and 3-substituted 2,3-dihydro-4H-1-benzopyran-4-ones. Med Chem Res 2012. [DOI: 10.1007/s00044-012-0058-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Kampa M, Pelekanou V, Gallo D, Notas G, Troullinaki M, Pediaditakis I, Charalampopoulos I, Jacquot Y, Leclercq G, Castanas E. ERα17p, an ERα P295 -T311 fragment, modifies the migration of breast cancer cells, through actin cytoskeleton rearrangements. J Cell Biochem 2012; 112:3786-96. [PMID: 21826705 DOI: 10.1002/jcb.23309] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Recently, our knowledge on estrogen receptor alpha (ERα) functions and fate has progressed: ERα enters in repeated transcription-modulating cycles (nucleus/cytoplasm/membrane trafficking processes and proteasomal degradation) that are governed by specific protein-protein interactions. Receptor fragments, especially those resulting from the proteolysis of its ligand binding domain, as well as corresponding synthetic peptides, have been studied with respect to their estrogenic/antiestrogenic potency. A peptide, corresponding to the human ERα P(295) -T(311) sequence (ERα17p) has been shown to alter breast cancer cell fate, triggering proliferation, or apoptosis. The aim of this work was to explore the effect of ERα17p on breast cancer cell migration and actin cytoskeleton dynamics and further analyze the mechanism of its membrane action. We show that ERα17p increases (MCF-7 and SK-BR-3 cells) or decreases (T47D and MDA-MB-231 cells) migration of breast cancer cells, in an ERα-independent manner, by mechanism(s) depending on Rho/ROCK and PI3K/Akt signaling pathways. Moreover, the peptide enhances the association of both estrogens and androgens to membranes and modifies cell migration, induced by E(2) -BSA. Additionally, initial evidence of a possible agonistic action of the peptide on GPR30 is also provided. ERα17p can be considered as a cell migration-modulator and could therefore constitute a therapeutic challenge, even in anti-estrogen-resistant tumors.
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Affiliation(s)
- Marilena Kampa
- Laboratory of Experimental Endocrinology, School of Medicine University of Crete, Heraklion, Greece
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Leclercq G, Gallo D, Cossy J, Laïos I, Larsimont D, Laurent G, Jacquot Y. Peptides targeting estrogen receptor alpha-potential applications for breast cancer treatment. Curr Pharm Des 2012; 17:2632-53. [PMID: 21728983 DOI: 10.2174/138161211797416048] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2010] [Accepted: 01/11/2011] [Indexed: 11/22/2022]
Abstract
Activation of the estrogen receptor alpha (ERα) is of prime importance for the development of hormone-dependent breast cancers. Hence, drugs able to impede the emergence of an active folding of ERα have been used for a long time as a first line therapeutic strategy. Aromatase inhibitors that block estradiol synthesis and / or antiestrogens that compete with hormone binding to the receptor are routinely prescribed. Unfortunately, emergence of tumor resistance almost invariably results from currently used antihormonal approaches. One may anticipate that a "multi-target" strategy affecting key regulatory domains distinct from ligand binding pocket of ERα may help to circumvent this problem. To reach this goal, the synthesis of peptides that may specifically inhibit intra- or inter-molecular interactions has been proposed. This paper describes functional motifs potentially suitable for the design of such antagonists. Activity of available peptidic and non-peptidic mimics of these motifs is also reviewed.
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Affiliation(s)
- Guy Leclercq
- Laboratoire J-C Heuson de Cancérologie Mammaire - Université Libre de Bruxelles, Institut Jules Bordet, 1 rue Héger-Bordet, B-1000 Brussels, Belgium.
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Carlier L, Byrne C, Miclet E, Bourgoin-Voillard S, Nicaise M, Tabet JC, Desmadril M, Leclercq G, Lequin O, Jacquot Y. Biophysical studies of the interaction between calmodulin and the R287-T311 region of human estrogen receptor α reveals an atypical binding process. Biochem Biophys Res Commun 2012; 419:356-61. [DOI: 10.1016/j.bbrc.2012.02.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Accepted: 02/03/2012] [Indexed: 10/14/2022]
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This P, de Cremoux P, Leclercq G, Jacquot Y. A critical view of the effects of phytoestrogens on hot flashes and breast cancer risk. Maturitas 2011; 70:222-6. [PMID: 21813250 DOI: 10.1016/j.maturitas.2011.07.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2011] [Revised: 06/07/2011] [Accepted: 07/03/2011] [Indexed: 01/26/2023]
Abstract
The increased risk of breast cancer recently observed with some specific estro-progestin associations has raised concerns about the harmful effects of menopausal hormone replacement therapy (HRT). It has been proposed that phytoestrogens (PEs), which have a similar chemical structure to estrogens, could be used as HRT. The main selling points of these preparations concern the management of hot flashes and their potential beneficial effects on breast tissue. In this review, we will address the effects of PE on hot flashes and breast cancer risk as well as the questions raised on a chemical point of view. We conclude that the efficacy of a PE rich diet or nutritional supplements is not clearly established. The use of PE as an alternative for HRT cannot be advocated for now, due to insufficient and conflicting data on efficacy and safety. Moreover, due to the hormone dependence of breast cancer, PE use must be contraindicated in breast cancer survivors.
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Affiliation(s)
- Pascale This
- Pole de Sénologie, Service d'Oncogénétique, Institut Curie, 26, rue d'Ulm, 75248 Paris Cedex 05, France.
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Leclercq G, de Cremoux P, This P, Jacquot Y. Lack of sufficient information on the specificity and selectivity of commercial phytoestrogens preparations for therapeutic purposes. Maturitas 2011; 68:56-64. [DOI: 10.1016/j.maturitas.2010.10.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2010] [Revised: 10/11/2010] [Accepted: 10/12/2010] [Indexed: 12/16/2022]
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de Cremoux P, This P, Leclercq G, Jacquot Y. Controversies concerning the use of phytoestrogens in menopause management: bioavailability and metabolism. Maturitas 2010; 65:334-9. [PMID: 20080366 DOI: 10.1016/j.maturitas.2009.12.019] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2009] [Revised: 12/18/2009] [Accepted: 12/18/2009] [Indexed: 12/20/2022]
Abstract
It has been proposed that the use of phytoestrogens (PE) in menopausal therapy could be beneficial to woman health, particularly with respect to hot flushes. Indeed, PE may compensate the lack of endogenous 17beta-estradiol occurring during menopause. However, therapeutic benefits remain questionable, as highlighted by recent publications. Indeed, data are often subjected to controversy since a number of exogenous and endogenous factors influencing the responsiveness of patients are not sufficiently taken into account. In the present paper, we will discuss the role of bioavailability and metabolism in the instability of individual response to PE.
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Affiliation(s)
- Patricia de Cremoux
- Unité de Pharmacologie Moléculaire, Institut Curie, 26 rue d'Ulm, 75248 Paris Cedex 05, France
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Bourgoin-Voillard S, Zins EL, Fournier F, Jacquot Y, Afonso C, Pèpe C, Leclercq G, Tabet JC. Stereochemical effects during [M-H]- dissociations of epimeric 11-OH-17beta-estradiols and distant electronic effects of substituents at C(11) position on gas phase acidity. J Am Soc Mass Spectrom 2009; 20:2318-2333. [PMID: 19818644 DOI: 10.1016/j.jasms.2009.08.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2009] [Revised: 08/21/2009] [Accepted: 08/21/2009] [Indexed: 05/28/2023]
Abstract
The affinity of estradiol derivatives for the estrogen receptor (ER) depends strongly on nature and stereochemistry of substituents in C(11) position of the 17beta-estradiol (I). In this work, the stereochemistry effects of the 11alpha-OH-17beta-estradiol (III(alpha)) and 11beta-OH-17beta-estradiol (III(beta)) were investigated using CID experiments and gas-phase acidity (DeltaH degrees (acid)) determination. The CID experiments showed that the steroids decompose via different pathways involving competitive dissociations with rate constants depending upon the alpha/beta C(11) stereochemistry. It was shown that the fragmentations of both deprotonated [III(alpha)-H]- and [III(beta)-H]- epimers were initiated by the deprotonation of the most acidic site, i.e. the phenolic hydroxyl at C(3). This view was confirmed by H/D exchange and double resonance experiments. Furthermore, the DeltaH degrees (acid) of both epimers (III(alpha) and III(beta)), 17beta-estradiol (I), and 17-desoxyestradiol (II) was determined using the extended Cooks' kinetic method. The resulting values allowed us to classify steroids as a function of their gas-phase acidity as follows: (III(beta)) >> (II) > (I) > (III(alpha)). Interestingly, the alpha/beta C(11) stereochemistry appeared to influence strongly the gas-phase acidity. This phenomenon could be explained through stereospecific proton interaction with pi-orbital cloud of A ring, which was confirmed by theoretical calculation.
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Sachon E, Clodic G, Blasco T, Jacquot Y, Bolbach G. In-Source Fragmentation of Very Labile Peptides in Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry. Anal Chem 2009; 81:8986-92. [DOI: 10.1021/ac901449d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Emmanuelle Sachon
- Laboratoire des Biomolécules, Ecole Normale Supérieure (ENS), Université P. et M. Curie, UMR-CNRS 7203, 4 Place Jussieu, Case Courrier 182, 75005 Paris, France, and Plateforme de Spectrométrie de Masse et Protéomique, IFR83, Université P. et M. Curie, 7-9 Quai Saint Bernard, Case Courrier 41, 75005 Paris, France
| | - Gilles Clodic
- Laboratoire des Biomolécules, Ecole Normale Supérieure (ENS), Université P. et M. Curie, UMR-CNRS 7203, 4 Place Jussieu, Case Courrier 182, 75005 Paris, France, and Plateforme de Spectrométrie de Masse et Protéomique, IFR83, Université P. et M. Curie, 7-9 Quai Saint Bernard, Case Courrier 41, 75005 Paris, France
| | - Thierry Blasco
- Laboratoire des Biomolécules, Ecole Normale Supérieure (ENS), Université P. et M. Curie, UMR-CNRS 7203, 4 Place Jussieu, Case Courrier 182, 75005 Paris, France, and Plateforme de Spectrométrie de Masse et Protéomique, IFR83, Université P. et M. Curie, 7-9 Quai Saint Bernard, Case Courrier 41, 75005 Paris, France
| | - Yves Jacquot
- Laboratoire des Biomolécules, Ecole Normale Supérieure (ENS), Université P. et M. Curie, UMR-CNRS 7203, 4 Place Jussieu, Case Courrier 182, 75005 Paris, France, and Plateforme de Spectrométrie de Masse et Protéomique, IFR83, Université P. et M. Curie, 7-9 Quai Saint Bernard, Case Courrier 41, 75005 Paris, France
| | - Gérard Bolbach
- Laboratoire des Biomolécules, Ecole Normale Supérieure (ENS), Université P. et M. Curie, UMR-CNRS 7203, 4 Place Jussieu, Case Courrier 182, 75005 Paris, France, and Plateforme de Spectrométrie de Masse et Protéomique, IFR83, Université P. et M. Curie, 7-9 Quai Saint Bernard, Case Courrier 41, 75005 Paris, France
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Kapitán J, Gallo D, Goasdoué N, Nicaise M, Desmadril M, Hecht L, Leclercq G, Barron LD, Jacquot Y. Identification of a human estrogen receptor α-derived antiestrogenic peptide that adopts a polyproline II conformation. J Pept Sci 2009; 15:455-64. [DOI: 10.1002/psc.1136] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Gallo D, Jacquot Y, Laurent G, Leclercq G. Calmodulin, a regulatory partner of the estrogen receptor alpha in breast cancer cells. Mol Cell Endocrinol 2008; 291:20-6. [PMID: 18524472 DOI: 10.1016/j.mce.2008.04.011] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2008] [Revised: 04/14/2008] [Accepted: 04/15/2008] [Indexed: 02/07/2023]
Abstract
Although calmodulin (CaM) interaction with estrogen receptor alpha (ERalpha) has been known for more than two decades, it is only recently that the molecular mechanism of CaM-mediated regulation of ERalpha is beginning to emerge. Others and we have identified a putative calmodulin binding site (P(295)LMIKRSKKNSLALSTADQMVS(317)) in ERalpha, at the boundary between the hinge and the ligand binding domain. ERalpha mutations affecting its association with CaM have been reported to generate high basal, estrogen-independent transactivation activity, indicating that the P(295)-T(317) sequence has an inhibitory function. Moreover, we found that a synthetic peptide (ERalpha17p: P(295)-T(311)) containing residues crucial for CaM binding exerts estrogenic effects on breast carcinoma cells. Finally, computer-aided conformational studies revealed that the CaM binding site might associate with a region located downstream in ERalpha (the beta turn/H4 region), this association likely resulting in an auto-inhibitory folding of the receptor. Thus, we propose as a hypothesis that CaM acts as a positive regulator by relieving this ERalpha auto-inhibition.
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Affiliation(s)
- Dominique Gallo
- Laboratoire J.-C. Heuson de Cancérologie Mammaire, Université Libre de Bruxelles, Institut Jules Bordet, 1 rue Héger-Bordet, B-1000 Brussels, Belgium
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37
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Gallo D, Haddad I, Laurent G, Vinh J, Jacquemotte F, Jacquot Y, Leclercq G. Regulatory function of the P295-T311 motif of the estrogen receptor alpha - does proteasomal degradation of the receptor induce emergence of peptides implicated in estrogenic responses? Nucl Recept Signal 2008; 6:e007. [PMID: 18432312 PMCID: PMC2329824 DOI: 10.1621/nrs.06007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2007] [Accepted: 04/01/2008] [Indexed: 11/29/2022]
Abstract
The way in which estrogen receptor α (ERα) mediates gene transcription and hormone-dependent cancer cell proliferation is now being largely reconsidered in view of several recent discoveries. ERα-mediated transcription appears to be a cyclic and transient process where the proteasome - and thus receptor degradation - plays a pivotal role. In view of our recent investigations, which demonstrate the estrogenic activity of a synthetic peptide corresponding to a regulatory motif of the receptor (ERα17p), we propose that ERα proteasomal degradation could induce the emergence of regulatory peptide(s). The latter would function as a signal and contribute to the ERα activation process, amplifying the initial hormonal stimulation and giving rise to sustained estrogenic response.
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Affiliation(s)
- Dominique Gallo
- Laboratoire J.-C. Heuson de Cancérologie Mammaire, Université Libre de Bruxelles (ULB), Institut Jules Bordet, Brussels, Belgium
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38
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Gallo D, Haddad I, Duvillier H, Jacquemotte F, Laïos I, Laurent G, Jacquot Y, Vinh J, Leclercq G. Trophic effect in MCF-7 cells of ERalpha17p, a peptide corresponding to a platform regulatory motif of the estrogen receptor alpha--underlying mechanisms. J Steroid Biochem Mol Biol 2008; 109:138-49. [PMID: 18262408 DOI: 10.1016/j.jsbmb.2007.12.012] [Citation(s) in RCA: 22] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2007] [Revised: 11/28/2007] [Accepted: 12/20/2007] [Indexed: 12/31/2022]
Abstract
As yet, estrogen receptor alpha (ERalpha) inhibitors used in clinical practice target a unique site, i.e. the hormone-binding pocket. With the aim of discovering other potential therapeutic targets in the receptor, we studied its AF-2a domain, a site that proves to be critical for ligand-independent ERalpha activity. Previous studies from our laboratory highlighted an auto-inhibitory action associated with a site included in this domain, i.e. the P295-T311 sequence. Accordingly, a deletion of this sequence produces a constitutively activated receptor mutant. More interestingly, a synthetic peptide with the P295-T311 sequence (ERalpha17p) elicits in breast cancer cell lines estrogenic responses that may be ascribed to a competitive mechanism towards the P295-T311-associated auto-inhibition of ERalpha. In the present study, we show that ERalpha17p sustains MCF-7 cell growth in estrogen-depleted culture medium by inducing molecular events promoting G1/S phase transition. We demonstrate, moreover, that this proliferative activity is associated with receptor down regulation (acceleration of ERalpha degradation and repression of ESR1 gene transcription), similar to that induced by estrogen agonists. Complementary studies suggest that our observations may be, at least in part, relevant to a competitive inhibition affecting ERalpha-Hsp70 association. Hence, the design of drugs able to stabilize ERalpha-Hsp70 complexes - where the receptor is in an inactive conformation - may be of therapeutic value.
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Affiliation(s)
- Dominique Gallo
- Laboratoire J.-C. Heuson de Cancérologie Mammaire, Université Libre de Bruxelles, Institut Jules Bordet, 1 rue Héger-Bordet, B-1000 Brussels, Belgium
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Gallo D, Jacquot Y, Cleeren A, Jacquemotte F, Laios I, Laurent G, Leclercq G. Molecular Basis of Agonistic Activity of ERα17p, a Synthetic Peptide Corresponding to a Sequence Located at the N-Terminal Part of the Estrogen Receptor αLigand Binding Domain. LETT DRUG DES DISCOV 2007. [DOI: 10.2174/157018007780867807] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Jacquot Y, Gallo D, Leclercq G. Estrogen receptor alpha--identification by a modeling approach of a potential polyproline II recognizing domain within the AF-2 region of the receptor that would play a role of prime importance in its mechanism of action. J Steroid Biochem Mol Biol 2007; 104:1-10. [PMID: 17258904 DOI: 10.1016/j.jsbmb.2006.10.008] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2006] [Accepted: 10/02/2006] [Indexed: 11/16/2022]
Abstract
Estrogen receptors (ERs) behave not only as ligand-dependent transcriptional factors; they can also trigger non-genomic responses involving mitogen activated protein kinases (MAPKs), reported to be crucial in transduction cascades. MAPKs are partially activated by proteins with domains able to interact with polyproline II (PPII) regions. Recent studies have brought up the direct interaction of PPII-containing proteins with the alpha subtype human ER (ERalpha). Such observations suggest that ERalpha may contain a "PPII recognizing domain" (PRD). By sequence alignment, we identified such a potential PRD within the AF-2 region of ERalpha (residues 351-414). According to our modeling studies based on X-ray structural data, this PRD appears to be divided in two sub-regions known to interact with alpha-helix containing coactivators. Our data also reveal the potential existence of intramolecular interactions of this domain with a large PPII-rich region of the receptor (residues 301-330). Implication of these regulatory structural elements in both genomic and non-genomic responses seems likely.
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Affiliation(s)
- Yves Jacquot
- Université Pierre et Marie Curie-Paris 6, CNRS, UMR 7613, Synthèse, Structure et Fonction de Molécules Bioactives, FR 2769, Case courrier 45, 4, place Jussieu, 75005 Paris, France.
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Gallo D, Jacquemotte F, Cleeren A, Laïos I, Hadiy S, Rowlands MG, Caille O, Nonclercq D, Laurent G, Jacquot Y, Leclercq G. Calmodulin-independent, agonistic properties of a peptide containing the calmodulin binding site of estrogen receptor alpha. Mol Cell Endocrinol 2007; 268:37-49. [PMID: 17316976 DOI: 10.1016/j.mce.2007.01.012] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2006] [Revised: 01/15/2007] [Accepted: 01/18/2007] [Indexed: 11/23/2022]
Abstract
Calmodulin (CaM) contributes to estrogen receptor alpha (ER)-mediated transcription. In order to study the underlying mechanisms, we synthesized a peptide including the CaM binding site: ERalpha17p (P(295)-T(311)). This peptide inhibited ER-CaM association, unlike two analogs in which two amino acids required for CaM binding were substituted. Exposure of MCF-7 cells to ERalpha17p down regulated ER, stimulated ER-dependent transcription and enhanced the proliferation of ER-positive breast cancer cell lines. Interestingly, ERalpha17p analogs unable to bind to CaM induced similar responses, demonstrating that ERalpha17p-mediated effects are mainly relevant to mechanisms independent of ER-CaM dissociation. The P(295)-T(311) motif is indeed a platform for multiple post-translational modifications not necessarily CaM-dependent. The additional finding that deletion of the P(295)-T(311) sequence in ER produced a constitutive transcriptional activity revealed that this platform motif has autorepressive functions. With regard to cell function, association of CaM to ER would counteract this autorepression, leading thereby to enhanced ER-mediated transactivation.
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Affiliation(s)
- Dominique Gallo
- Laboratoire J.-C. Heuson de Cancérologie Mammaire, Université Libre de Bruxelles, Institut Jules Bordet, 1 rue Héger-Bordet, B-1000 Brussels, Belgium
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Jacquot Y, Laïos I, Cleeren A, Nonclercq D, Bermont L, Refouvelet B, Boubekeur K, Xicluna A, Leclercq G, Laurent G. Synthesis, structure, and estrogenic activity of 4-amino-3-(2-methylbenzyl)coumarins on human breast carcinoma cells. Bioorg Med Chem 2007; 15:2269-82. [PMID: 17275315 DOI: 10.1016/j.bmc.2007.01.025] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [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: 11/14/2006] [Revised: 01/09/2007] [Accepted: 01/17/2007] [Indexed: 11/28/2022]
Abstract
A number of coumarins exhibit interesting pharmacological activities and are therefore of therapeutic use. We report here the synthesis and the structural analysis of new N-substituted 4-amino-3-(2-methylbenzyl)coumarins (compounds 8a-8e) that present structural analogies with estrothiazine and 11- or 7-substituted 17beta-estradiol. These derivatives were tested with respect to estrogenic activity on the estrogen receptor positive (ER+) human MCF-7 breast cancer cell line. Two of the reported compounds (8a and 8b) stimulated specifically the proliferation of MCF-7 cells, but not that of estrogen receptor negative (ER-) human MDA-MB-231 breast cancer cells, suggesting that their mitogenic activity is mediated by ER. Accordingly, the stimulating effect of 8a and 8b was suppressed by the pure antiestrogen fulvestrant. Besides, 8a and 8b induced ER down-regulation similar to that produced by classical ER agonists or pure antagonists. The effects of the compounds under study on ER-mediated transcription were assessed on (ER+) MVLN cells, that is, MCF-7 cells stably transfected with a pVit-tk-Luc reporter plasmid. Derivatives 8a and 8b, and surprisingly compound 8c, enhanced ER-mediated gene transactivation in that model. Finally, no coumarin was able to compete with tritiated 17beta-estradiol ([(3)H]E(2)) for ER binding, suggesting unconventional interactions with the receptor, such as interactions with the second binding pocket or with the coactivator-binding region. To conclude, observations performed in this study on compound 8c reveal that estrogenic activity can be dissociated from enhancement of cell proliferation. Furthermore, ERE-driven transactivation of transcription seems to be a condition necessary, but not sufficient, for estrogen-induced stimulation of cell growth.
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Affiliation(s)
- Yves Jacquot
- Equipe de Chimie Thérapeutique, Faculté de Médecine et de Pharmacie, Place Saint-Jacques, 25030 Besançon, France.
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Jacquot Y, Broutin I, Miclet E, Nicaise M, Lequin O, Goasdoué N, Joss C, Karoyan P, Desmadril M, Ducruix A, Lavielle S. High affinity Grb2-SH3 domain ligand incorporating Cbeta-substituted prolines in a Sos-derived decapeptide. Bioorg Med Chem 2006; 15:1439-47. [PMID: 17113302 DOI: 10.1016/j.bmc.2006.11.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2006] [Revised: 10/30/2006] [Accepted: 11/02/2006] [Indexed: 10/23/2022]
Abstract
Peptide ligands that disrupt MAPK pathways are of great interest for a better understanding of these signalling cascades and represent therefore an attractive target to control cell degenerative processes. In that context, selective disruption of the upstream Grb2/Sos complex in the Ras/MAPK cascade has focused extensive work. The Sos PPII decapeptide, which interacts with the Grb2-SH3 domains, has been modified in various positions and the best inhibitors designed so far are either dimeric ligands or peptoid analogues of the VPPPVPPRRR sequence. We report the synthesis of new Grb2 ligands in which the key Val5 residue has been replaced by a cis C(beta)-substituted proline. Both fluorescence and ITC assays have been employed to measure the affinity of these substituted peptides for a recombinant Grb2 protein. Whereas proline in position 5 completely abolished the binding potency, a cis C(beta)-methyl-L-proline restored the affinity. Other cis C(beta)-proline substituents led to a complete loss of binding potency. Combining the best modifications: a cis C(beta)-methylproline 5, N-acetylation, C-carboxamide and dimerization yielded a 560-fold affinity enhancement compared to the wild-type VPPPVPPRRR sequence. This study shows that C(beta)-substituted prolines may constitute a new alternative for PPII ligands, combining entropy and enthalpy beneficial effects.
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Affiliation(s)
- Yves Jacquot
- Université Pierre et Marie Curie-Paris 6, UMR 7613, Paris, France; CNRS, UMR 7613, Synthèse, Structure et Fonction de Molécules Bioactives, Paris, France.
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Seo HS, DeNardo DG, Jacquot Y, Laïos I, Vidal DS, Zambrana CR, Leclercq G, Brown PH. Stimulatory effect of genistein and apigenin on the growth of breast cancer cells correlates with their ability to activate ER alpha. Breast Cancer Res Treat 2006; 99:121-34. [PMID: 16541309 DOI: 10.1007/s10549-006-9191-2] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.7] [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] [Received: 01/30/2006] [Accepted: 02/07/2006] [Indexed: 02/06/2023]
Abstract
Genistein and apigenin are phytoestrogens present in commercial preparations used for the treatment of postmenopausal symptoms. In this study, we assessed the influence of these compounds on mammary tumor growth. Both compounds stimulate the proliferation of MCF-7 and T47D cells [estrogen receptor alpha (ERalpha-positive)], but do not stimulate the proliferation of an ERalpha-negative cell line (MDA-MB-435 cells). Genistein appeared more efficient in this regard due to its higher binding affinity for ERalpha, a property explained by a structural analysis of the binding of these compounds to the ERalpha's ligand binding domain. As previously described for estradiol (E(2)), genistein and apigenin down regulated ERalpha and enhanced estrogen response element (ERE)-dependent gene expression. The additional finding that genistein antagonizes the anti-proliferative effect of hydroxytamoxifen suggests phytoestrogens may be detrimental in women with breast cancer who are being treated with tamoxifen. In addition, because of their ability to stimulate breast cell growth, the widespread use of phytoestrogens in postmenopausal women could be detrimental.
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Affiliation(s)
- Hye-Sook Seo
- Department of Medicine, Breast Center, Baylor College of Medicine, Houston, TX 77030, USA
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Abstract
Bone scintigraphy allows the diagnostic of many pathologies related to bone through the intravenous administration of a phosphonate bone marker complexed to 99 metastable technetium (99mTc). The instability of these injectable solutions on contact with air can lead to a mixture of pertechnetate VII (99mTcO4-) and technetium IV (99mTcO2-, xH2O), technetium IV being the only derivative to fix bone. A qualitative control of the purity of these solutions proved to be consequently important before administration. We report here the perfecting of a new chromatographic test based on reverse phase high performance thin layer chromatography (HPTLC). This test, simple, rapid and reproductive allows without ambiguity the detection of 99mTcO4-(VII) and 99mTcO2-(IV), xH2O in hydroxymethylene diphosphonate (HMDP) injectable solutions ready to use.
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Affiliation(s)
- Y Jacquot
- Service de médecine nucléaire, Chu Jean-Minjoz, 3, boulevard Fleming, F25000 Besançon.
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Laïos I, Cleeren A, Xicluna A, Jacquot Y, Leclercq G. [Lack of implication of estrogen receptors in ovarian toxicity induced by psoralens]. Ann Dermatol Venereol 2004; 131:994-6. [PMID: 15602390 DOI: 10.1016/s0151-9638(04)93813-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- I Laïos
- Laboratoire J.-C. Heuson de Cancérologie Mammaire, Institut Jules Bordet, Bruxelles, Belgique
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Refouvelet B, Guyon C, Jacquot Y, Girard C, Fein H, Bévalot F, Robert JF, Heyd B, Mantion G, Richert L, Xicluna A. Synthesis of 4-hydroxycoumarin and 2,4-quinolinediol derivatives and evaluation of their effects on the viability of HepG2 cells and human hepatocytes culture. Eur J Med Chem 2004; 39:931-7. [PMID: 15501542 DOI: 10.1016/j.ejmech.2004.07.006] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.9] [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: 02/24/2003] [Revised: 07/08/2004] [Accepted: 07/12/2004] [Indexed: 10/26/2022]
Abstract
We report here the synthesis of aromatic coumarins and aromatic alpha-quinolones which were evaluated in vitro for their protective potentialities against tert-butyl hydroperoxide (t-BHP)-induced oxidative damage on human liver cell death, i.e., human hepatoma HepG2 cell line and human hepatocytes in primary culture. We found that the presence of a benzylidene at the 3-position or a heterocycle with N and S heteroatoms on the benzopyrone or quinolone system was essential for the protective effect of these compounds against t-BHP-induced decrease in viability of cells. We found also that a methoxy group on the aromatic ring systems decreased this potential. t-BHP-induced cytotoxicity in primary cultures of human hepatocytes could be therefore prevented by these compounds suggesting that they could display hepatoprotective effects in humans.
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Affiliation(s)
- Bernard Refouvelet
- Laboratoire de chimie organique et thérapeutique, faculté de médecine et de pharmacie, université de Franche-Comté, 25030 Besançon cedex, France
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Quancard J, Labonne A, Jacquot Y, Chassaing G, Lavielle S, Karoyan P. Asymmetric Synthesis of 3-Substituted Proline Chimeras Bearing Polar Side Chains of Proteinogenic Amino Acids. J Org Chem 2004; 69:7940-8. [PMID: 15527274 DOI: 10.1021/jo048762q] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [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: 11/30/2022]
Abstract
The amino-zinc-ene-enolate cyclization reaction is a straightforward route to the synthesis of 3-substituted prolines. Herein we report the application of this reaction to the syntheses of proline chimeras of lysine, glutamic acid, glutamine, arginine, and serine. All these compounds were obtained in enantiomerically pure form and suitably protected for peptide synthesis.
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Affiliation(s)
- Jean Quancard
- Synthèse, Structure et Fonction de Molécules Bioactives, CNRS/UMR 7613, Université Pierre et Marie Curie, 4 Place Jussieu, 75252 Paris Cedex 05, France
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André C, Jacquot Y, Truong TT, Thomassin M, Robert JF, Guillaume YC. Analysis of the progesterone displacement of its human serum albumin binding site by beta-estradiol using biochromatographic approaches: effect of two salt modifiers. J Chromatogr B Analyt Technol Biomed Life Sci 2004; 796:267-81. [PMID: 14581067 DOI: 10.1016/s1570-0232(03)00563-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [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: 11/23/2022]
Abstract
The mechanisms of (i) the binding of two sex-hormones (i.e. progesterone and beta-estradiol) to human serum albumin (HSA) and (ii) the progesterone displacement of its HSA binding cavity by beta-estradiol were studied by biochromatography using three different methods. In the first time, zonal elution method was used to prove the direct competition effect between the two sex-hormone. In the second time, the competition effect between beta-estradiol and progesterone to bound on the same HSA site was analysed by the competitive bi-Langmuir approach. Finally, the thermodynamic data of these two binding processes were studied. The Gibbs free energy value (Delta(approximately)G degrees) of the displacement equilibrium was negative demonstrating that beta-estradiol displaced progesterone of its HSA binding cavity. Moreover, the effect of two chloride modifiers (i.e. Na(+), Mg(2+)) on these two binding processes were analysed. Results showed that in the salt biological concentration ranges, the Mg(2+) cation enhanced strongly the bioavailable progesterone, whereas the Na(+) cation interacted slowly on the progesterone displacement of its HSA binding site by beta-estradiol. This study showed that it must be useful to carry out more in vivo test on the magnesium supplementation effect for women who suffer from estrogen dominance syndrome.
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Affiliation(s)
- C André
- Equipe des Sciences Séparatives et Biopharmaceutiques (2SB), Laboratoire de Chimie Analytique, Place Saint-Jacques, 25030 Besançon Cedex, France
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Jacquot Y, Rojas C, Refouvelet B, Robert JF, Leclercq G, Xicluna A. Recent advances in the development of phytoestrogens and derivatives: an update of the promising perspectives in the prevention of postmenopausal diseases. Mini Rev Med Chem 2003; 3:387-400. [PMID: 12769692 DOI: 10.2174/1389557033488006] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [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: 11/22/2022]
Abstract
Phytoestrogens constitute a promising alternative in the treatment of diseases associated with menopause. Nevertheless, the lack of data concerning their pharmacology and their toxicology requires use precautions. After reminding the pharmacology of estrogen receptors, this review outlines the estrogenicity and the therapeutic potentialities of phytoestrogens according to their structure.
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Affiliation(s)
- Y Jacquot
- Equipe de Chimie Thérapeutique, Faculté de Médecine et de Pharmacie, Place Saint-Jacques, 25030 Besançon, France
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