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Schioppa L, Fall F, Ortiz S, Poupaert JH, Quetin-Leclercq J. A Validated HPLC-PDA-HRMS Method to Investigate the Biological Stability and Metabolism of Antiparasitic Triterpenic Esters. Molecules 2021; 26:molecules26237154. [PMID: 34885738 PMCID: PMC8659078 DOI: 10.3390/molecules26237154] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 11/20/2021] [Accepted: 11/22/2021] [Indexed: 11/16/2022] Open
Abstract
Pentacyclic triterpenes (PTs) are commonly found in medicinal plants with well-known antiparasitic effects. Previous research on C-3 and C-27 triterpenic esters showed effective and selective in vitro antiparasitic activities and in vivo effectiveness by parenteral routes. The aim of this study was to determine triterpenic esters' stability in different biological-like media and the main microsomal degradation products. An HPLC-PDA method was developed and validated to simultaneously analyze and quantify bioactive triterpenic esters in methanol (LOQ: 2.5 and 1.25-100 µg/mL) and plasma (LOQ: 5-125 µg/mL). Overall, both triterpenic esters showed a stable profile in aqueous and buffered solutions as well as in entire plasma, suggesting gaining access to the ester function is difficult for plasma enzymes. Conversely, after 1 h, 30% esters degradation in acidic media was observed with potential different hydrolysis mechanisms. C-3 (15 and 150 µM) and C-27 esters (150 µM) showed a relatively low hepatic microsomal metabolism (<23%) after 1 h, which was significantly higher in the lowest concentration of C-27 esters (15 µM) (>40% degradation). Metabolic HPLC-PDA-HRMS studies suggested hydrolysis, hydroxylation, dehydration, O-methylation, hydroxylation and/or the reduction of hydrolyzed derivatives, depending on the concentration and the position of the ester link. Further permeability and absorption studies are required to better define triterpenic esters pharmacokinetic and specific formulations designed to increase their oral bioavailability.
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Affiliation(s)
- Laura Schioppa
- Pharmacognosy Laboratory, Louvain Drug Research Institute (LDRI), Université Catholique de Louvain (UCLouvain), Avenue E. Mounier, B1 72.03, B-1200 Brussels, Belgium; (F.F.); (S.O.); (J.Q.-L.)
- Correspondence:
| | - Fanta Fall
- Pharmacognosy Laboratory, Louvain Drug Research Institute (LDRI), Université Catholique de Louvain (UCLouvain), Avenue E. Mounier, B1 72.03, B-1200 Brussels, Belgium; (F.F.); (S.O.); (J.Q.-L.)
| | - Sergio Ortiz
- Pharmacognosy Laboratory, Louvain Drug Research Institute (LDRI), Université Catholique de Louvain (UCLouvain), Avenue E. Mounier, B1 72.03, B-1200 Brussels, Belgium; (F.F.); (S.O.); (J.Q.-L.)
| | - Jacques H. Poupaert
- Medicinal Chemistry Research Group (CMFA), Louvain Drug Research Institute (LDRI), Université Catholique de Louvain (UCLouvain), Avenue E. Mounier, B1 72.04, B-1200 Brussels, Belgium;
| | - Joelle Quetin-Leclercq
- Pharmacognosy Laboratory, Louvain Drug Research Institute (LDRI), Université Catholique de Louvain (UCLouvain), Avenue E. Mounier, B1 72.03, B-1200 Brussels, Belgium; (F.F.); (S.O.); (J.Q.-L.)
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Hountondji C, Poupaert JH, Aguida B, Saga FKA, Pothier J, Créchet JB, Cocks C, Barty L, Kassehin UC, Gbaguidi FA. COVID-19: Mechanisms of the Antiviral Activities of Selective Antibiotics Targeting the Human 80S Ribosome. Open Biochem J 2021. [DOI: 10.2174/1874091x02115010038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Background:
The majority of scientists, physicians, and healthcare professionals were trained with the paradigm: “antibiotics are for bacteria only !”, because they misunderstood the definition of the ribosome targeting antibiotics. In the context of the current worldwide COVID-19 pandemic, it might be useful to recall as precisely as possible the definition of the word antibiotic and provide evidence that some classes of antibiotics could offer excellent means to counteract viral infections via specific mechanisms.
Methods:
Molecular modeling and docking studies were used, as well as the tRNAox labeling reaction of the ribosomal protein eL42 in situ on human 80S ribosomes to demonstrate that cycloheximide and its thiosemicarbazone analogues bind to the catalytic Lys-53 residue of the human large subunit ribosomal protein eL42.
Results:
Comparison of the binding sites for Cycloheximide (CHX) and Sparsomycin (SPS) on the evolutionarily conserved E. coli bL12 and S. cerevisiae eL42 by means of molecular modeling and docking studies showed that: (i) SPS binds in proximity to the catalytic Lys-65 residue of the GANK motif of rp bL12 and to the catalytic Lys-55 residue of the GGQTKP motif of rp eL42; (ii) CHX failed to bind to the GANK motif, while the glutarimide moiety of SPS and CHX was found to make contact with Lys-55 of the GGQTKP motif of rp eL42.
Conclusion:
In this report, we demonstrate that cycloheximide and its thiosemicarbazone analogues are capable of inhibiting the human 80S ribosomes selectively through their binding to the ε-amino group of the side chain of Lys-53. As a consequence, these small-molecule inhibitors of translation are susceptible to exhibit antiviral activities by preventing the human ribosomes of the SARS-CoV-2 infected cells from synthesizing the viral proteins and enzymes.
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Schioppa L, Beaufay C, Bonneau N, Sanchez M, Girardi C, Leverrier A, Ortiz S, Palermo J, Poupaert JH, Quetin‐Leclercq J. Design, Synthesis and Biological Activity of C3 Hemisynthetic Triterpenic Esters as Novel Antitrypanosomal Hits. ChemistryOpen 2021; 10:896-903. [PMID: 34499412 PMCID: PMC8428374 DOI: 10.1002/open.202100159] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 08/17/2021] [Indexed: 11/07/2022] Open
Abstract
Research for innovative drugs is crucial to contribute to parasitic infections control and eradication. Inspired by natural antiprotozoal triterpenes, a library of 12 hemisynthetic 3-O-arylalkyl esters was derived from ursolic and oleanolic acids through one-step synthesis. Compounds were tested on Trypanosoma, Leishmania and the WI38 cell line alongside with a set of triterpenic acids. Results showed that the triterpenic C3 esterification keeps the antitrypanosomal activity (IC50 ≈1.6-5.5 μm) while reducing the cytotoxicity compared to parent acids. Unsaturation of the ester alkyl chain leads to an activity loss interestingly kept when a sterically hindered group replaces the double bond or shields the ester group. An ursane/oleanane C3 hydroxylation was the only important feature for antileishmanial activity. Two candidates, dihydrocinnamoyl and 2-fluorophenylpropionyl ursolic acids, were tested on an acute mouse model of African trypanosomiasis with significant parasitemia reduction at day 5 post-infection for the dihydrocinnamoyl derivative. Further evaluation on other alkyl/protective groups should be investigated both in vitro and in vivo.
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Affiliation(s)
- Laura Schioppa
- Pharmacognosy Research GroupLouvain Drug Research Institute (LDRI)UCLouvainAvenue E. Mounier B1.72.03LouvainB-1200Belgium
| | - Claire Beaufay
- Pharmacognosy Research GroupLouvain Drug Research Institute (LDRI)UCLouvainAvenue E. Mounier B1.72.03LouvainB-1200Belgium
| | - Natacha Bonneau
- Pharmacognosy Research GroupLouvain Drug Research Institute (LDRI)UCLouvainAvenue E. Mounier B1.72.03LouvainB-1200Belgium
| | - Marianela Sanchez
- Departamento de Química OrgánicaFacultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresCiudad Universitaria, Pab. 21428Buenos AiresArgentina
| | - Cynthia Girardi
- Pharmacognosy Research GroupLouvain Drug Research Institute (LDRI)UCLouvainAvenue E. Mounier B1.72.03LouvainB-1200Belgium
| | - Aurélie Leverrier
- Departamento de Química OrgánicaFacultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresCiudad Universitaria, Pab. 21428Buenos AiresArgentina
| | - Sergio Ortiz
- Pharmacognosy Research GroupLouvain Drug Research Institute (LDRI)UCLouvainAvenue E. Mounier B1.72.03LouvainB-1200Belgium
| | - Jorge Palermo
- Departamento de Química OrgánicaFacultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresCiudad Universitaria, Pab. 21428Buenos AiresArgentina
| | - Jacques H. Poupaert
- Medicinal Chemistry Research GroupLouvain Drug Research Institute (LDRI)UCLouvainAvenue E. Mounier B1.72.04LouvainB-1200Belgium
| | - Joëlle Quetin‐Leclercq
- Pharmacognosy Research GroupLouvain Drug Research Institute (LDRI)UCLouvainAvenue E. Mounier B1.72.03LouvainB-1200Belgium
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Hountondji C, Besnaïnou G, Gaudet E, Poupaert JH. Repositioning Adequate Antibiotics to Treat/Cure the Coronavirus Disease 2019 (COVID-19): Current Treatments and Future Directions. Open Biochem J 2021. [DOI: 10.2174/1874091x02115010001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Aims:
Rational use of antibiotics against the betacoronavirus SARS-CoV-2 responsible for the COVID-19 pandemic.
Objective:
Repositioning and repurposing adequate antibiotics to cure the Coronavirus Disease 2019 (COVID-19).
Background:
It is widely accepted that viral infections such as the SARS-CoV-2 cannot be cured by antibiotics, whereas bacterial infections can. It is because the SARS-CoV-2 virus has no protein synthesis machinery (usually targeted by antibiotics) to produce from its RNA genome, the viral proteins and enzymes essential for its replication and/or for the assembly of viral particles. However, the antibiotics must be capable of inhibiting the ribosomes of the protein synthesis machinery of the SARS-CoV-2-infected human host cells, in order to prevent them from synthesizing new proteins that they do not need, but are needed for the virus to spread. Unfortunately, the only antibiotic capable of selectively inhibiting the human 80S ribosomes, namely cycloheximide, was found to be a poisonous drug for the mammals. Therefore, the only possibility is to search for the antibiotics that are capable of inhibiting both bacterial and eukaryal ribosomes, in order to prevent at the same time the ribosomes of the infected human host cells from synthesizing the proteins and enzymes for the SARS-CoV-2 virus, and those of the eventual opportunistic pathogenic bacteria from developing pneumonia.
Methods:
First, we have used a molecular modeling study involving the tools of the semi-empirical quantum mechanics PM3 method to study the interaction between the cation Zn++ and all the molecules considered as zinc transporters in this report. By this approach, the niche in which Zn++ is located was determined. Such an interaction serves as a shuttle and allows zinc cation to invade endocellular structures in the SARS-CoV-2-infected human host cells. Second, we have measured the poly (U)-dependent poly (Phe) synthesis activity of human 80S ribosomes in the presence of increasing concentrations of four antibiotics of the class of the macrolides, namely erythromycin, azithromycin, clarithromycin and telithromycin. This experiment led us to determine for each macrolide, the half-inhibitory concentration (IC50) that is the concentration of antibiotic corresponding to 50% inhibition of the activity of the human 80S ribosomes. Finally, we have analyzed previously published data from the group of Nierhaus (Berlin) on the competition between the incoming aminoacyl-tRNA and the antibiotic tetracycline for the binding to the ribosomal A-site on the E. coli 70S or rabbit liver 80S ribosomes. This led to the conclusion by the authors that tetracycline most likely binds to corresponding sites in 70S and 80S ribosomes with comparable affinity.
Results:
We propose to reposition the macrolides (azithromycin or erythromycin or others) and tetracyclines for the treatment of COVID-19 patients, on account of the following data gathered in this report. First, these antibiotics are already currently successfully used in medicine in humans and animals. Second, the binding sites of these antibiotics at the upper part of the protein exit tunnel (for the macrolides) and the ribosomal A-site (for tetracyclines) are universally conserved features of the ribosomes in all kingdoms of life. So, these classes of antibiotics are expected to bind to all kinds of ribosomes, the 70S as well as the 80S type, with comparable affinity. Therefore, they are capable of preventing at the same time the ribosomes of the infected human host cells from synthesizing the proteins and enzymes for the SARS-CoV-2 virus, and those of the eventual opportunistic pathogenic bacteria from developing pneumonia. Third, the efficacy assessment of these antibiotics in clinical application consisted of comparing their affinity constants of binding to the human ribosomes with their blood concentration.
For example, in the case of azithromycin, the amount of antibiotic administered to COVID-19 patients was 100 μg/ml of circulating blood, which is 43 times superior to the half-inhibitory concentration (IC50 or KIa of 2.3 μg/ml), the concentration of azithromycin corresponding to 50% inhibition of the activity of the human 80S ribosomes. Fourth, zinc cations were previously shown to be a strong antiviral agent, while all the macrolides and tetracyclines that we propose for repurposing or repositioning to cure the COVID-19 are shown in the present report to form Zn++-antibiotic complex and behave as efficient zinc transporters into the SARS-CoV-2-infected host cells.
Conclusion:
The macrolides (azithromycin or erythromycin or others) and tetracyclines selected for repositioning and repurposing to cure COVID-19 are candidates as specific and effective therapeutic drugs available for the coronavirus disease. We propose to combat the current COVID-19 pandemic with azithromycin or erythromycin (or equivalent) alone or in combination with tetracycline (or equivalent) in the presence of Zn++(SO4--). Taking into account the fact that azithromycin had been shown to be effective in treating viral infections such as papillomaviruses in humans and dogs, we conclude that the statement “no antibiotic for viral infections !” is not relevant for all the clinically approved classes of antibiotics, because selective antibiotics such as the universal antibiotics described in the present report are capable of exhibiting antiviral activities through specific interactions with the human 80S ribosomes of infected host cells. As a conclusion, even though the clinical and experimental data presented here do not suggest virucidal activity of azithromycin-zinc or tetracycline-zinc complexes, they do indicate that when administered simultaneously at the onset of first signs of COVID-19, the most common symptoms being fatigue, fever, dry cough, headache, sore throat, muscle pain or shortness of breath, azithromycin (or tetracycline) and zinc cations are capable of inhibiting ribosomal activity of SARS-CoV-2-infected human cells. This results in blocking protein and enzyme synthesis vital for viral RNA replication and for assembly of viral particles. Early treatment allows both reductions of viremia as well as stabilizing symptoms. The major advantage of this therapeutic strategy is avoiding prolonged clinical COVID-19 disease with contingent worsening of illness and subsequent need for intensive care. Prolonged COVID-19 illness is the major downfall of the present pandemic, returning to normal being long, difficult, and sometimes impossible.
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Poupaert JH, Aguida B, Hountondji C. Study of the Interaction of Zinc Cation with Azithromycin and its Significance in the COVID-19 Treatment: A Molecular Approach. Open Biochem J 2020. [DOI: 10.2174/1874091x02014010033] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Introduction:
On account of the current COVID-19 pandemic, we have explored the importance of azithromycin and zinc in the treatment of the coronavirus disease by studying the interaction between the cation Zn++ and azithromycin with the tools of the semi-empirical quantum mechanics PM3 method.
Methods:
By this approach, the niche in which Zn++ is located was determined. Zn++ creates a strong clastic binding between an amine and a hydroxyl group located on the amino-hexose side-chain. Such an interaction serves as a shuttle and allows zinc cation to invade endocellular structures.
Results:
In this triple collaborative association, the role of hydroxychloroquine would be more that of a chaotropic agent at plasmic membranes, which facilitates access to the azithromycin-Zn++ equipage into key internal compartments.
Conclusion:
Finally, we show that both azithromycin and Zn++ are susceptible to play a direct role against the replication and the assembly of SARS-CoV-2 particles.
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Ameryckx A, Thabault L, Pochet L, Leimanis S, Poupaert JH, Wouters J, Joris B, Van Bambeke F, Frédérick R. 1-(2-Hydroxybenzoyl)-thiosemicarbazides are promising antimicrobial agents targeting d-alanine-d-alanine ligase in bacterio. Eur J Med Chem 2018; 159:324-338. [DOI: 10.1016/j.ejmech.2018.09.067] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 08/09/2018] [Accepted: 09/26/2018] [Indexed: 12/21/2022]
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Kapanda CN, Poupaert JH, Lambert DM. Insight into the medicinal chemistry of the endocannabinoid hydrolase inhibitors. Curr Med Chem 2014; 20:1824-46. [PMID: 23410152 DOI: 10.2174/09298673113209990108] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2012] [Revised: 01/07/2013] [Accepted: 02/13/2013] [Indexed: 11/22/2022]
Abstract
Endocannabinoid hydrolases are nowadays increasingly considered as potential therapeutic targets for treating several pathological states. So far, numerous classes of endocannabinoid hydrolase inhibitors have been described. We herein review the medicinal chemistry of these inhibitors with a particular emphasis on the basis of their design, chemical structure, structure-activity relationships, and inhibition mechanisms.
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Affiliation(s)
- C N Kapanda
- Medicinal Chemistry, Cannabinoid and Endocannabinoid Research Group, B1.73.10, Louvain Drug Research Institute (LDRI), Université catholique de Louvain, 73 avenue E. Mounier B-1200 Bruxelles, Belgium
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8
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Lepeltier E, Bourgaux C, Rosilio V, Poupaert JH, Meneau F, Zouhiri F, Lepêtre-Mouelhi S, Desmaële D, Couvreur P. Self-assembly of squalene-based nucleolipids: relating the chemical structure of the bioconjugates to the architecture of the nanoparticles. Langmuir 2013; 29:14795-803. [PMID: 24219056 DOI: 10.1021/la403338y] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Squalene-based nucleolipids, including anticancer or antiviral prodrugs, gave rise to nanoparticles displaying a diversity of structures upon nanoprecipitation in water. Synchrotron small-angle X-ray scattering and cryo-TEM imaging revealed that both the nature of the nucleoside and the position of the squalene moiety relative to the nucleobase determined the self-assembly of the corresponding bioconjugates. It was found that small chemical differences resulted in major differences in the self-organization of nucleolipids when squalene was grafted onto the nucleobase whereas only lamellar phases were observed when squalene was linked to the sugar moiety. The key role of hydrogen bonds between nucleobases in the formation of the lamellar phases was suggested, in agreement with molecular simulations. These findings provide a way to fine tune the supramolecular organization of squalene-based prodrugs, with the aim of improving their pharmacological activity.
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Affiliation(s)
- Elise Lepeltier
- Univ. Paris-Sud XI, Faculté de Pharmacie, UMR CNRS 8612-Institut Galien Paris-Sud , 92296 Châtenay-Malabry Cedex, France
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9
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Bhat R, Fishback JA, Matsumoto RR, Poupaert JH, McCurdy CR. Structure activity relationship study of benzo[d]thiazol-2(3H)one based σ receptor ligands. Bioorg Med Chem Lett 2013; 23:5011-3. [PMID: 23867168 PMCID: PMC3762478 DOI: 10.1016/j.bmcl.2013.06.032] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 06/06/2013] [Accepted: 06/11/2013] [Indexed: 11/27/2022]
Abstract
Herein we report the SAR study which involved structural modifications to the linker length, aryl substitution and alkylamine ring size of the benzo[d]thiazol-2(3H)one based sigma receptor (σ) ligands. Many compounds in this series displayed low nanomolar affinity for the σ receptor subtypes. In particular, 8a showed high affinity (σ-1 Ki = 4.5 nM) for σ-1 receptors and moderately high selectivity (483-fold) over σ-2 receptors.
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Affiliation(s)
- Rohit Bhat
- Department of Medicinal Chemistry, University of Mississippi, University, MS 38677, USA
| | - James A. Fishback
- Department of Basic Pharmaceutical Sciences, West Virginia University, Morgantown, WV 26506, USA
| | - Rae R. Matsumoto
- Department of Basic Pharmaceutical Sciences, West Virginia University, Morgantown, WV 26506, USA
| | - Jacques H. Poupaert
- Université Catholique de Louvain, 74 Avenue Emmanuel Mounier, B-1200 Brussels, Belgium
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10
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Kapanda CN, Masquelier J, Labar G, Muccioli GG, Poupaert JH, Lambert DM. Synthesis and pharmacological evaluation of 2,4-dinitroaryldithiocarbamate derivatives as novel monoacylglycerol lipase inhibitors. J Med Chem 2012; 55:5774-83. [PMID: 22651858 DOI: 10.1021/jm3006004] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Monoacylglycerol lipase (MAGL) is responsible for signal termination of 2-arachidonoylglycerol (2-AG), an endocannabinoid neurotransmitter endowed with several physiological effects. Previously, we showed that the arylthioamide scaffold represents a privileged template for designing MAGL inhibitors. A series of 37 compounds resulting from pharmacomodulations around the arylthioamide template were synthesized and tested to evaluate their inhibitory potential on MAGL activity as well as their selectivity over fatty acid amide hydrolase (FAAH), another endocannabinoid-hydrolyzing enzyme. We have identified 2,4-dinitroaryldithiocarbamate derivatives as a novel class of MAGL inhibitors. Among the synthesized compounds, we identified [2,4-dinitrophenyl-4-(4-tert-butylbenzyl)piperazine-1-carbodithioate] (CK37), as the most potent MAGL inhibitor within this series (IC(50) = 154 nM). We have also identified [2,4-dinitrophenyl-4-benzhydrylpiperazine-1-carbodithioate] (CK16) as a selective MAGL inhibitor. These compounds are irreversible MAGL inhibitors that probably act by interacting with Cys208 or Cys242 and Ser122 residues of the enzyme. Moreover, CK37 is able to raise 2-arachidonoylglycerol (2-AG) levels in intact cells.
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Affiliation(s)
- Coco N Kapanda
- Medicinal Chemistry, Cannabinoid and Endocannabinoid Research Group, B1.73.10, Louvain Drug Research Institute (LDRI), Université Catholique de Louvain, 73 Avenue E. Mounier, B-1200 Bruxelles, Belgium
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11
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Sémiramoth N, Di Meo C, Zouhiri F, Saïd-Hassane F, Valetti S, Gorges R, Nicolas V, Poupaert JH, Chollet-Martin S, Desmaële D, Gref R, Couvreur P. Self-assembled squalenoylated penicillin bioconjugates: an original approach for the treatment of intracellular infections. ACS Nano 2012; 6:3820-3831. [PMID: 22482704 DOI: 10.1021/nn204928v] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We describe here new nanoparticles based on the bioconjugation of penicillin G to squalene in order to overcome severe intracellular infections by pathogen bacteria whose mechanism of resistance arises from the poor intracellular diffusion of several antibiotics. Two different squalene-penicillin G conjugates were synthesized (pH-sensitive and pH-insensitive), and their self-assembly as nanoparticles was investigated through morphology and stability studies. These nanoparticles had a size of 140 ± 10 nm (polydispersity index of 0.1) and a negative charge, and they did not display any supramolecular organization. Furthermore, they were found stable in water and in different culture medium. The cellular uptake and localization of these fluorescently labeled nanoparticles were explored on the macrophage cell line J774 by flow cytometry and confocal microscopy analysis. The squalenoylated nanoparticles were found to be cell internalized through clathrin-dependent and -independent endocytic pathways. Moreover, they induced an improved intracellular antibacterial activity on the facultative intracellular pathogen S. aureus, compared with free penicillin G, despite the absence of co-localization between the bacteria and the nanoparticles in the cells. This study suggests that the bioconjugation of an antibiotic to a squalene template could be a valuable approach for overcoming the antibiotic resistance due to intracellular bacterial infections.
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Affiliation(s)
- Nicolas Sémiramoth
- Faculty of Pharmacy, UMR CNRS 8612, University of Paris-Sud XI, 5 Rue Jean-Baptiste Clément, 92296 Châtenay-Malabry Cedex, France
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12
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Matuszak N, Hamtiaux L, Baldeyroux B, Muccioli GG, Poupaert JH, Lansiaux A, Lambert DM. Dual inhibition of MAGL and type II topoisomerase by N-phenylmaleimides as a potential strategy to reduce neuroblastoma cell growth. Eur J Pharm Sci 2011; 45:263-71. [PMID: 22127371 DOI: 10.1016/j.ejps.2011.11.011] [Citation(s) in RCA: 16] [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: 07/20/2011] [Revised: 11/02/2011] [Accepted: 11/11/2011] [Indexed: 01/08/2023]
Abstract
The endocannabinoid system is implicated in numerous physiopathological processes while more and more pieces of evidence wave the link between this complex machinery and cancer related phenomenon. In these lines, we confirmed the effects of 2-arachidonoylglycerol (2-AG), the main endocannabinoid, on neuroblastoma cells proliferation in vitro, and proved that some N-phenylmaleimide compounds that were previously shown as MAGL inhibitors can also inhibit type 2 topoisomerase. We also shed light on their antiproliferative effects on a neuroblastoma cell line. In order to establish a link between MAGL inhibition, topoisomerase inhibition and the effects on N1E-115 cells, we tested combinations of maleimides or known endocannabinoid metabolism inhibitors and 2-AG, the major MAGL substrate, on N1E-115 cells. However, none of the inhibitors tested, except the carbamate CAY10499, managed to increase 2-AG's effects. Even the MAGL reference inhibitor JZL184 failed to induce a stronger inhibition of proliferation.
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Affiliation(s)
- Nicolas Matuszak
- Université catholique de Louvain, Louvain Drug Research Institute (LDRI), Medicinal Chemistry Research Group (CMFA), 73 avenue E. Mounier, bte B1.73.10, 1200 Bruxelles, Belgium
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13
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Mésangeau C, Amata E, Alsharif W, Seminerio MJ, Robson MJ, Matsumoto RR, Poupaert JH, McCurdy CR. Synthesis and pharmacological evaluation of indole-based sigma receptor ligands. Eur J Med Chem 2011; 46:5154-61. [PMID: 21899931 PMCID: PMC3272488 DOI: 10.1016/j.ejmech.2011.08.031] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2011] [Revised: 08/23/2011] [Accepted: 08/23/2011] [Indexed: 01/09/2023]
Abstract
A series of novel indole-based analogs were prepared and their affinities for sigma receptors were determined using in vitro radioligand binding assays. The results of this study identified several compounds with nanomolar sigma-2 affinity and significant selectivity over sigma-1 receptors. In particular, 2-(4-(3-(4-fluorophenyl)indol-1-yl)butyl)-6,7-dimethoxy-1,2,3,4-tetrahydroisoquinoline (9f) was found to display high affinity at sigma-2 receptors with good selectivity (σ-1/σ-2 = 395). The pharmacological binding profile for this compound was established with other relevant non-sigma sites.
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Affiliation(s)
- Christophe Mésangeau
- Department of Medicinal Chemistry, School of Pharmacy, The University of Mississippi, University, Mississippi 38677, USA
| | - Emanuele Amata
- Department of Medicinal Chemistry, School of Pharmacy, The University of Mississippi, University, Mississippi 38677, USA
| | - Walid Alsharif
- Department of Medicinal Chemistry, School of Pharmacy, The University of Mississippi, University, Mississippi 38677, USA
| | - Michael J. Seminerio
- Department of Basic Pharmaceutical Sciences, West Virginia University, Morgantown, West Virginia 26506, USA
| | - Matthew J. Robson
- Department of Basic Pharmaceutical Sciences, West Virginia University, Morgantown, West Virginia 26506, USA
| | - Rae R. Matsumoto
- Department of Basic Pharmaceutical Sciences, West Virginia University, Morgantown, West Virginia 26506, USA
| | - Jacques H. Poupaert
- Université Catholique de Louvain, 74 Avenue Emmanuel Mounier, B-1200 Brussels, Belgium
| | - Christopher R. McCurdy
- Department of Medicinal Chemistry, School of Pharmacy, The University of Mississippi, University, Mississippi 38677, USA
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Affiliation(s)
- Jacques H Poupaert
- School of Pharmacy, University of Louvain, Avenue E. Mounier 73, B-1200 Brussels
| | - Gaëtane Hamoir
- School of Pharmacy, University of Louvain, Avenue E. Mounier 73, B-1200 Brussels
| | - Philippe Barbeaux
- School of Pharmacy, University of Louvain, Avenue E. Mounier 73, B-1200 Brussels
| | - Didier Lambert
- School of Pharmacy, University of Louvain, Avenue E. Mounier 73, B-1200 Brussels
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Fishback JA, Mesangeau C, Poupaert JH, McCurdy CR, Matsumoto RR. Synthesis and characterization of [³H]-SN56, a novel radioligand for the σ₁ receptor. Eur J Pharmacol 2011; 653:1-7. [PMID: 21130085 PMCID: PMC3726058 DOI: 10.1016/j.ejphar.2010.10.099] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2010] [Revised: 09/30/2010] [Accepted: 10/06/2010] [Indexed: 11/25/2022]
Abstract
The study of the binding characteristics of σ ligands in vivo and in vitro requires radiolabeled probes with high affinity and selectivity. The radioligand presently used for in vitro studies of the σ₁ receptor, [³H](+)-pentazocine, has significant limitations; it is difficult to synthesize, has limited chemical stability, and can be problematic to obtain. Evaluation of a series of novel 2(3H)-benzothiazolone compounds revealed SN56 to have sub-nanomolar and preferential affinity for the σ₁ subtype, relative to σ₂ and non-sigma, binding sites. The goal of this study was to characterize the binding of [³H]-SN56 to σ₁ receptors isolated from rat brain. Standard in vitro binding techniques were utilized to 1) determine the specificity and affinity of binding to σ₁ receptors, 2) confirm that[³H]-SN56 labels sites previously identified as σ₁ by comparing binding to sites labeled by [³H](+)-pentazocine, and 3) characterize the kinetics of binding. The results indicate that [³H]-SN56 exhibits 1) specific, saturable, and reversible binding to the σ₁ receptor, with B(max)=340±10 fmol/mg and K(d)=0.069±0.0074 nM, 2) competitive displacement by classical sigma compounds, yielding σ₁ K(i) values consistent with those reported in the literature, and 3) binding kinetics compatible with a 90 min incubation, and filtration for separation of free and bound radioligand. The results of these studies suggest that [(3)H]-SN56 may serve as a viable alternative to [³H](+)-pentazocine in radioligand binding assays.
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Affiliation(s)
- James A. Fishback
- Department of Basic Pharmaceutical Sciences, West Virginia University, Morgantown, WV 26506, USA
- Department of Pharmacology, University of Mississippi, University, MS 38677, USA
| | - Christophe Mesangeau
- Department of Medicinal Chemistry, University of Mississippi, University, MS 38677, USA
| | - Jacques H. Poupaert
- Universite Catholique de Louvain, Avenue Emmanuel Mounier 74, B-1200, Brussels, Belgium
| | | | - Rae R. Matsumoto
- Department of Basic Pharmaceutical Sciences, West Virginia University, Morgantown, WV 26506, USA
- Department of Pharmacology, University of Mississippi, University, MS 38677, USA
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Abstract
Sigma receptors have been well documented as a protein target for cocaine and have been shown to be involved in the toxic and stimulant actions of cocaine. Strategies to reduce the access of cocaine to sigma receptors have included antisense oligonucleotides to the sigma-1 receptor protein as well as small molecule ligand with affinity for sigma receptor sites. These results have been encouraging as novel protein targets that can attenuate the actions of cocaine are desperately needed as there are currently no medications approved for treatment of cocaine toxicity or addiction. Many years of research in this area have yet to produce an effective treatment and much focus was on dopamine systems. A flurry of research has been carried out to elucidate the role of sigma receptors in the blockade of cocaine effects but this research has yet to yield a clinical agent. This review summarizes the work to date on the linkage of sigma receptors and the actions of cocaine and the progress that has been made with regard to small molecules. Although there is still a lack of an agent in clinical trials with a sigma receptor mechanism of action, work is progressing and the ligands are becoming more selective for sigma systems and the potential remains high.
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Affiliation(s)
- Sanju Narayanan
- Department of Medicinal Chemistry, School of Pharmacy, The University of Mississippi, University, 38677, USA
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Kanyonyo MR, Poupaert JH, Levêque P, Gozzo A, Vanderpoorten K, Lambert DM, Diouf O, Vamecq J. Reaction of aryl isothiocyanates with phthalic acid derivatives. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19961050110] [Citation(s) in RCA: 2] [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: 11/08/2022]
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Aichaoui H, Poupaert JH, Lesieur D, Hénichart JP. AlCl3-DMF Reagent in the Friedel-Crafts Reaction. Application to 2(3H)Benzoxazolones in the Haworth Reaction. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19921011211] [Citation(s) in RCA: 11] [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: 11/09/2022]
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De Cock CJC, Keyser JLD, Poupaert JH, Dumont P. Anomalous Reactivity of Methylidenemalonates in the Prilezhaev Reaction. Evidence For A 1,3-Dipolar Mechanism. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19870961009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Poupaert JH, Keyser JLD, Vandervorst D, Dumont P. Phase-Transfer Catalysis by Poly (Ethyleneglycol) 600 in the Biltz Synthesis of Phenytoin. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19840930612] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Poupaert JH, Smeyers C, Böttcher P. A High-Yield Selective N(3)-Alkylation Process of Hydantoins Using Dimethylformanide Dialkyl Acetals. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19850940611] [Citation(s) in RCA: 7] [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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Poupaert JH, Duarte S, Colacino E, Depreux P, McCurdy CR, Lambert DL. WILLGERODT-KINDLER'S MICROWAVE-ENHANCED SYNTHESIS OF THIOAMIDE DERIVATIVES. PHOSPHORUS SULFUR 2010. [DOI: 10.1080/10426500490466995] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
| | - Sandro Duarte
- a Ecole de Pharmacie, Université Catholique de Louvain , Bruxelles, Belgium
| | - Evelina Colacino
- a Ecole de Pharmacie, Université Catholique de Louvain , Bruxelles, Belgium
| | - Patrick Depreux
- b Institut de Chimie Pharmaceutique Albert Lespagnol , Lille, France
| | | | - Didier L. Lambert
- a Ecole de Pharmacie, Université Catholique de Louvain , Bruxelles, Belgium
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Collard F, Stroobant V, Lamosa P, Kapanda CN, Lambert DM, Muccioli GG, Poupaert JH, Opperdoes F, Van Schaftingen E. Molecular identification of N-acetylaspartylglutamate synthase and beta-citrylglutamate synthase. J Biol Chem 2010; 285:29826-33. [PMID: 20657015 DOI: 10.1074/jbc.m110.152629] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
The purpose of the present work was to determine the identity of the enzymes that synthesize N-acetylaspartylglutamate (NAAG), the most abundant dipeptide present in vertebrate central nervous system (CNS), and β-citrylglutamate, a structural analogue of NAAG present in testis and immature brain. Previous evidence suggests that NAAG is not synthesized on ribosomes but presumably is synthesized by a ligase. As attempts to detect this ligase in brain extracts failed, we searched the mammalian genomes for putative enzymes that could catalyze this type of reaction. Mammalian genomes were found to encode two putative ligases homologous to Escherichia coli RIMK, which ligates glutamates to the C terminus of ribosomal protein S6. One of them, named RIMKLA, is almost exclusively expressed in the CNS, whereas RIMKLB, which shares 65% sequence identity with RIMKLA, is expressed in CNS and testis. Both proteins were expressed in bacteria or HEK293T cells and purified. RIMKLA catalyzed the ATP-dependent synthesis of N-acetylaspartylglutamate from N-acetylaspartate and l-glutamate. RIMKLB catalyzed this reaction as well as the synthesis of β-citrylglutamate. The nature of the reaction products was confirmed by mass spectrometry and NMR. RIMKLA was shown to produce stoichiometric amounts of NAAG and ADP, in agreement with its belonging to the ATP-grasp family of ligases. The molecular identification of these two enzymes will facilitate progress in the understanding of the function of NAAG and β-citrylglutamate.
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Affiliation(s)
- François Collard
- Laboratory of Physiological Chemistry, de Duve Institute and Université Catholique de Louvain, Avenue Hippocrate 75, B-1200 Brussels, Belgium
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Kapanda CN, Muccioli GG, Labar G, Poupaert JH, Lambert DM. Bis(dialkylaminethiocarbonyl)disulfides as potent and selective monoglyceride lipase inhibitors. J Med Chem 2009; 52:7310-4. [PMID: 19883085 DOI: 10.1021/jm901323s] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Monoglyceride lipase (MGL) inhibition may offer an approach in treating diseases in which higher 2-arachidonoyglycerol activity would be beneficial. We report here the synthesis and pharmacological evaluation of bis(dialkylaminethiocarbonyl)disulfide derivatives as irreversible MGL inhibitors. Inhibition occurs through interactions with MGL C208 and C242 residues, and these derivatives exhibit high inhibition selectivity over fatty acid amide hydrolase, another endocannabinoid-hydrolyzing enzyme.
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Affiliation(s)
- Coco N Kapanda
- Universite Catholique de Louvain, Louvain Drug Research Institute, Endocannabinoid and Cannabinoid Research Group, Drug Design and Discovery Center, Unite de Chimie Pharmaceutique et de Radiopharmacie, 73-40 Avenue E. Mounier UCL-CMFA (7340), B-1200 Bruxelles, Belgium
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Affiliation(s)
- Jacques H. Poupaert
- a Medicinal Chemistry, School of Pharmacy, Faculty of Medicine , UCL B-1200 , Brussels , BELGIUM E-mail:
| | - Karim Bouinidane
- a Medicinal Chemistry, School of Pharmacy, Faculty of Medicine , UCL B-1200 , Brussels , BELGIUM E-mail:
| | - Marc Renard
- a Medicinal Chemistry, School of Pharmacy, Faculty of Medicine , UCL B-1200 , Brussels , BELGIUM E-mail:
| | - Didier M. Lambert
- a Medicinal Chemistry, School of Pharmacy, Faculty of Medicine , UCL B-1200 , Brussels , BELGIUM E-mail:
| | - Majed Isa
- b Faculty of Pharmacy, University of Amman , Ammn , JORDAN
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Aichaoui H, Guenadil F, Kapanda CN, Lambert DM, McCurdy CR, Poupaert JH. Synthesis and pharmacological evaluation of antioxidant chalcone derivatives of 2(3H)-benzoxazolones. Med Chem Res 2008. [DOI: 10.1007/s00044-008-9143-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Kapanda CN, Muccioli GG, Labar G, Draoui N, Lambert DM, Poupaert JH. Search for monoglyceride lipase inhibitors: synthesis and screening of arylthioamides derivatives. Med Chem Res 2008. [DOI: 10.1007/s00044-008-9123-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Mésangeau C, Narayanan S, Green AM, Shaikh J, Kaushal N, Viard E, Xu YT, Fishback JA, Poupaert JH, Matsumoto RR, McCurdy CR. Conversion of a highly selective sigma-1 receptor-ligand to sigma-2 receptor preferring ligands with anticocaine activity. J Med Chem 2008; 51:1482-6. [PMID: 18278854 DOI: 10.1021/jm701357m] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cocaine's toxicity can be mitigated by blocking its interaction with sigma-1 receptors. The involvement of sigma-2 receptors remains unclear. To investigate their potential role, we have designed compounds through a convergent synthesis utilizing a highly selective sigma-1 ligand and elements of a selective sigma-2 ligand. Among the synthesized compounds was produced a subnanomolar sigma-2 ligand with an 11-fold preference over sigma-1 receptors. These compounds may be useful in developing effective pharmacotherapies for cocaine toxicity.
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Affiliation(s)
- Christophe Mésangeau
- Department of Medicinal Chemistry, The University of Mississippi, Mississippi 38677, USA
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Kaushal N, Croom C, Shaikh J, Narayanan S, Mesangeau C, Poupaert JH, McCurdy CR, Matsumoto RR. SN79, A Novel Sigma (σ) ‐ 2 Receptor Antagonist, Attenuates Cocaine‐Induced Behaviors In Mice. FASEB J 2008. [DOI: 10.1096/fasebj.22.1_supplement.713.15] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Couvreur P, Reddy LH, Mangenot S, Poupaert JH, Desmaële D, Lepêtre-Mouelhi S, Pili B, Bourgaux C, Amenitsch H, Ollivon M. Discovery of new hexagonal supramolecular nanostructures formed by squalenoylation of an anticancer nucleoside analogue. Small 2008; 4:247-253. [PMID: 18247384 DOI: 10.1002/smll.200700731] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
In this study, the dynamically folded conformation of squalene (SQ) is taken advantage of to link this natural compound to the anticancer nucleoside analogue gemcitabine (gem) in order to achieve the spontaneous formation of nanoassemblies (SQgem) in water. Cryogenic transmission electron microscopy examination reveals particles (104 nm) with a hexagonal or multifaceted shape that display an internal structure made of reticular planes, each particle being surrounded by an external shell. X-ray diffraction evidences the hexagonal molecular packing of SQgem, resulting from the stacking of direct or inverse cylinders. The respective volumes of the gem and SQ molecules as well as molecular modeling of SQgem suggest the stacking of inverse hexagonal phases, in which the central aqueous core, consisting of water and gem molecules, is surrounded by SQ moieties. These SQgem nanoassemblies also exhibit impressively greater anticancer activity than gem against a solid subcutaneously grafted tumor, following intravenous administration. To our knowledge, this is the first demonstration of hexagonal phase organization with a SQ derivative.
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Affiliation(s)
- Patrick Couvreur
- Université Paris-Sud XI, Faculté de Pharmacie, UMR CNRS 8612, IFR 141, 92296 Châtenay-Malabry Cedex, France
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Stern E, Muccioli GG, Bosier B, Hamtiaux L, Millet R, Poupaert JH, Hénichart JP, Depreux P, Goossens JF, Lambert DM. Pharmacomodulations around the 4-Oxo-1,4-dihydroquinoline-3-carboxamides, a Class of Potent CB2-Selective Cannabinoid Receptor Ligands: Consequences in Receptor Affinity and Functionality. J Med Chem 2007; 50:5471-84. [DOI: 10.1021/jm070387h] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Eric Stern
- Institut de Chimie Pharmaceutique Albert Lespagnol, Université de Lille 2, EA 2692, 3 rue du Pr. Laguesse, B.P. 83, F-59006 Lille, France, Unité de Chimie Pharmaceutique et de Radiopharmacie, Ecole de Pharmacie, Faculté de Médecine, Université catholique de Louvain, 73 avenue E. Mounier UCL-CMFA (7340), B-1200 Bruxelles, Belgium, and Laboratoire de Chimie Analytique, EA 4034, Faculté des Sciences Pharmaceutiques et Biologiques, Université de Lille 2, 3 rue du Pr. Laguesse, B.P. 83, F-59006 Lille, France
| | - Giulio G. Muccioli
- Institut de Chimie Pharmaceutique Albert Lespagnol, Université de Lille 2, EA 2692, 3 rue du Pr. Laguesse, B.P. 83, F-59006 Lille, France, Unité de Chimie Pharmaceutique et de Radiopharmacie, Ecole de Pharmacie, Faculté de Médecine, Université catholique de Louvain, 73 avenue E. Mounier UCL-CMFA (7340), B-1200 Bruxelles, Belgium, and Laboratoire de Chimie Analytique, EA 4034, Faculté des Sciences Pharmaceutiques et Biologiques, Université de Lille 2, 3 rue du Pr. Laguesse, B.P. 83, F-59006 Lille, France
| | - Barbara Bosier
- Institut de Chimie Pharmaceutique Albert Lespagnol, Université de Lille 2, EA 2692, 3 rue du Pr. Laguesse, B.P. 83, F-59006 Lille, France, Unité de Chimie Pharmaceutique et de Radiopharmacie, Ecole de Pharmacie, Faculté de Médecine, Université catholique de Louvain, 73 avenue E. Mounier UCL-CMFA (7340), B-1200 Bruxelles, Belgium, and Laboratoire de Chimie Analytique, EA 4034, Faculté des Sciences Pharmaceutiques et Biologiques, Université de Lille 2, 3 rue du Pr. Laguesse, B.P. 83, F-59006 Lille, France
| | - Laurie Hamtiaux
- Institut de Chimie Pharmaceutique Albert Lespagnol, Université de Lille 2, EA 2692, 3 rue du Pr. Laguesse, B.P. 83, F-59006 Lille, France, Unité de Chimie Pharmaceutique et de Radiopharmacie, Ecole de Pharmacie, Faculté de Médecine, Université catholique de Louvain, 73 avenue E. Mounier UCL-CMFA (7340), B-1200 Bruxelles, Belgium, and Laboratoire de Chimie Analytique, EA 4034, Faculté des Sciences Pharmaceutiques et Biologiques, Université de Lille 2, 3 rue du Pr. Laguesse, B.P. 83, F-59006 Lille, France
| | - Régis Millet
- Institut de Chimie Pharmaceutique Albert Lespagnol, Université de Lille 2, EA 2692, 3 rue du Pr. Laguesse, B.P. 83, F-59006 Lille, France, Unité de Chimie Pharmaceutique et de Radiopharmacie, Ecole de Pharmacie, Faculté de Médecine, Université catholique de Louvain, 73 avenue E. Mounier UCL-CMFA (7340), B-1200 Bruxelles, Belgium, and Laboratoire de Chimie Analytique, EA 4034, Faculté des Sciences Pharmaceutiques et Biologiques, Université de Lille 2, 3 rue du Pr. Laguesse, B.P. 83, F-59006 Lille, France
| | - Jacques H. Poupaert
- Institut de Chimie Pharmaceutique Albert Lespagnol, Université de Lille 2, EA 2692, 3 rue du Pr. Laguesse, B.P. 83, F-59006 Lille, France, Unité de Chimie Pharmaceutique et de Radiopharmacie, Ecole de Pharmacie, Faculté de Médecine, Université catholique de Louvain, 73 avenue E. Mounier UCL-CMFA (7340), B-1200 Bruxelles, Belgium, and Laboratoire de Chimie Analytique, EA 4034, Faculté des Sciences Pharmaceutiques et Biologiques, Université de Lille 2, 3 rue du Pr. Laguesse, B.P. 83, F-59006 Lille, France
| | - Jean-Pierre Hénichart
- Institut de Chimie Pharmaceutique Albert Lespagnol, Université de Lille 2, EA 2692, 3 rue du Pr. Laguesse, B.P. 83, F-59006 Lille, France, Unité de Chimie Pharmaceutique et de Radiopharmacie, Ecole de Pharmacie, Faculté de Médecine, Université catholique de Louvain, 73 avenue E. Mounier UCL-CMFA (7340), B-1200 Bruxelles, Belgium, and Laboratoire de Chimie Analytique, EA 4034, Faculté des Sciences Pharmaceutiques et Biologiques, Université de Lille 2, 3 rue du Pr. Laguesse, B.P. 83, F-59006 Lille, France
| | - Patrick Depreux
- Institut de Chimie Pharmaceutique Albert Lespagnol, Université de Lille 2, EA 2692, 3 rue du Pr. Laguesse, B.P. 83, F-59006 Lille, France, Unité de Chimie Pharmaceutique et de Radiopharmacie, Ecole de Pharmacie, Faculté de Médecine, Université catholique de Louvain, 73 avenue E. Mounier UCL-CMFA (7340), B-1200 Bruxelles, Belgium, and Laboratoire de Chimie Analytique, EA 4034, Faculté des Sciences Pharmaceutiques et Biologiques, Université de Lille 2, 3 rue du Pr. Laguesse, B.P. 83, F-59006 Lille, France
| | - Jean-François Goossens
- Institut de Chimie Pharmaceutique Albert Lespagnol, Université de Lille 2, EA 2692, 3 rue du Pr. Laguesse, B.P. 83, F-59006 Lille, France, Unité de Chimie Pharmaceutique et de Radiopharmacie, Ecole de Pharmacie, Faculté de Médecine, Université catholique de Louvain, 73 avenue E. Mounier UCL-CMFA (7340), B-1200 Bruxelles, Belgium, and Laboratoire de Chimie Analytique, EA 4034, Faculté des Sciences Pharmaceutiques et Biologiques, Université de Lille 2, 3 rue du Pr. Laguesse, B.P. 83, F-59006 Lille, France
| | - Didier M. Lambert
- Institut de Chimie Pharmaceutique Albert Lespagnol, Université de Lille 2, EA 2692, 3 rue du Pr. Laguesse, B.P. 83, F-59006 Lille, France, Unité de Chimie Pharmaceutique et de Radiopharmacie, Ecole de Pharmacie, Faculté de Médecine, Université catholique de Louvain, 73 avenue E. Mounier UCL-CMFA (7340), B-1200 Bruxelles, Belgium, and Laboratoire de Chimie Analytique, EA 4034, Faculté des Sciences Pharmaceutiques et Biologiques, Université de Lille 2, 3 rue du Pr. Laguesse, B.P. 83, F-59006 Lille, France
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De Keyser JL, De Cock CJC, Poupaert JH, Dumont P. Synthesis of 14C labelled acrylic derivatives: Diethyl [3-14C] methylidenemalonate and isobutyl [3-14C] cyanoacrylate. J Labelled Comp Radiopharm 2006. [DOI: 10.1002/jlcr.2580270807] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [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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Lambert DM, Gallez B, Poupaert JH. Synthesis and distribution of N-benzyloxycarbonyl-[14C]-glycine, a lipophilic derivative of glycine. J Labelled Comp Radiopharm 2006. [DOI: 10.1002/jlcr.2580360414] [Citation(s) in RCA: 2] [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: 11/06/2022]
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Gérardy BM, Poupaert JH, Vandervorst D, Dumont P, Declerq JP, Van Meerssche M, Portoghese PS. Synthesis and physico-chemical properties of (R, S)-6-ditrideuteriomethylamino-4,4-diphenylheptan-3-one hydrochloride (methadone-d6). J Labelled Comp Radiopharm 2006. [DOI: 10.1002/jlcr.2580220103] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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36
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Muccioli GG, Fazio N, Scriba GKE, Poppitz W, Cannata F, Poupaert JH, Wouters J, Lambert DM. Substituted 2-thioxoimidazolidin-4-ones and imidazolidine-2,4-diones as fatty acid amide hydrolase inhibitors templates. J Med Chem 2006; 49:417-25. [PMID: 16392827 DOI: 10.1021/jm050977k] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.1] [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: 11/28/2022]
Abstract
The demonstration of the essential role of fatty acid amide hydrolase (FAAH) in hydrolyzing endogenous bioactive fatty acid derivatives has launched the quest for the discovery of inhibitors for this enzyme. Along this line, a set of 58 imidazolidine-2,4-dione and 2-thioxoimidazolidin-4-one derivatives was evaluated as FAAH inhibitors. Among these compounds, 3-substituted 5,5'-diphenylimidazolidine-2,4-dione and 3-substituted 5,5'-diphenyl-2-thioxoimidazolidin-4-one derivatives were previously described as CB(1) cannabinoid receptor ligands. In the present study, we synthesized several derivatives exhibiting interesting FAAH inhibitory activity and devoid of affinity for the CB(1) and CB(2) cannabinoid receptors. For instance, 3-heptyl-5,5'-diphenylimidazolidine-2,4-dione (14) and 5,5'-diphenyl-3-tetradecyl-2-thioxo-imidazolidin-4-one (46) showed pI(50) values of 5.12 and 5.94, respectively. In conclusion, it appears that even though several 3-substituted 5,5'-diphenyl-2-thioxoimidazolidin-4-one and 3-substituted 5,5'-diphenylimidazolidine-2,4-dione derivatives have been previously shown to behave as CB(1) cannabinoid receptor ligands, appropriate substitutions of these templates can result in FAAH inhibitors devoid of affinity for the cannabinoid receptors.
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Affiliation(s)
- Giulio G Muccioli
- Unité de Chimie pharmaceutique et de Radiopharmacie, Ecole de Pharmacie, Faculté de Médecine, Université catholique de Louvain, Avenue E. Mounier 73, UCL-CMFA 7340, B-1200 Bruxelles, Belgium
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38
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Muccioli GG, Wouters J, Charlier C, Scriba GKE, Pizza T, Di Pace P, De Martino P, Poppitz W, Poupaert JH, Lambert DM. Synthesis and Activity of 1,3,5-Triphenylimidazolidine-2,4-diones and 1,3,5-Triphenyl-2-thioxoimidazolidin-4-ones: Characterization of New CB1 Cannabinoid Receptor Inverse Agonists/Antagonists. J Med Chem 2006; 49:872-82. [PMID: 16451053 DOI: 10.1021/jm050484f] [Citation(s) in RCA: 35] [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: 11/28/2022]
Abstract
Obesity and metabolic syndrome, along with drug dependence (nicotine, alcohol, opiates), are two of the major therapeutic applications for CB(1) cannabinoid receptor antagonists and inverse agonists. In the present study, we report the synthesis and structure-affinity relationships of 1,5-diphenylimidazolidine-2,4-dione and 1,3,5-triphenylimidazolidine-2,4-dione derivatives. These new 1,3,5-triphenylimidazolidine-2,4-dione derivatives and their thio isosteres were obtained by an original pathway and exhibited interesting affinity and selectivity for the human CB(1) cannabinoid receptor. A [(35)S]-GTPgammaS binding assay revealed the inverse agonist properties of the compounds at the CB(1) cannabinoid receptor. Furthermore, molecular modeling studies were conducted in order to delineate the binding mode of this series of derivatives into the CB(1) cannabinoid receptor. 1,3-Bis(4-bromophenyl)-5-phenylimidazolidine-2,4-dione (25) and 1,3-bis(4-chlorophenyl)-5-phenylimidazolidine-2,4-dione (23) are the imidazolidine-2,4-dione derivatives possessing the highest affinity for the human CB(1) cannabinoid receptor reported to date.
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MESH Headings
- Amidohydrolases/antagonists & inhibitors
- Animals
- Binding Sites
- Binding, Competitive
- Brain/metabolism
- CHO Cells
- Cricetinae
- Cricetulus
- Crystallography, X-Ray
- Humans
- Imidazolidines/chemical synthesis
- Imidazolidines/chemistry
- Imidazolidines/pharmacology
- Imidazolines/chemical synthesis
- Imidazolines/chemistry
- Imidazolines/pharmacology
- In Vitro Techniques
- Male
- Models, Molecular
- Radioligand Assay
- Rats
- Rats, Wistar
- Receptor, Cannabinoid, CB1/agonists
- Receptor, Cannabinoid, CB1/antagonists & inhibitors
- Receptor, Cannabinoid, CB1/metabolism
- Receptor, Cannabinoid, CB2/drug effects
- Receptor, Cannabinoid, CB2/metabolism
- Stereoisomerism
- Structure-Activity Relationship
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Affiliation(s)
- Giulio G Muccioli
- Unité de Chimie pharmaceutique et de Radiopharmacie, Ecole de Pharmacie, Faculté de Médecine, Université catholique de Louvain, Avenue E. Mounier 73, UCL-CMFA 7340, B-1200 Brussels, Belgium
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39
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Stern E, Muccioli GG, Millet R, Goossens JF, Farce A, Chavatte P, Poupaert JH, Lambert DM, Depreux P, Hénichart JP. Novel 4-Oxo-1,4-dihydroquinoline-3-carboxamide Derivatives as New CB2 Cannabinoid Receptors Agonists: Synthesis, Pharmacological Properties and Molecular Modeling. J Med Chem 2005; 49:70-9. [PMID: 16392793 DOI: 10.1021/jm050467q] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Recent data indicated that the CB(2) cannabinoid receptor constitutes an attractive drug target due to its potential functional role in several physiological and pathological processes. A set of 4-oxo-1,4-dihydroquinoline-3-carboxamide derivatives, characterized by the presence of some important structural requirements exhibited by other classes of cannabinoid ligands, such as an aliphatic or aromatic carboxamide group in position 3, and an alkyl or benzyl group in position 1, was synthesized and assayed to measure their respective affinity for both human CB(1) and CB(2) cannabinoid receptors. The results indicate that these 3-carboxamido-quinolones derivatives exhibited a CB(2) receptor selectivity, particularly derivatives 28-30, and 32R. Moreover, in the [(35)S]-GTPgammaS binding assay, all the compounds behaved as CB(2) receptor agonists. Molecular modeling studies showed that compound 30 interacts with the CB(2) receptor through a combination of hydrogen bond and aromatic/hydrophobic interactions. In conclusion, 4-oxo-1,4-dihydroquinoline-3-carboxamide derivatives constitute a new class of potent and selective CB(2) cannabinoid receptors agonists.
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Affiliation(s)
- Eric Stern
- Institut de Chimie Pharmaceutique Albert Lespagnol, Université de Lille 2, EA 2692, 3 rue du Pr. Laguesse, B.P. 83, F-59006 Lille, France
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40
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Muccioli GG, Wouters J, Scriba GKE, Poppitz W, Poupaert JH, Lambert DM. 1-Benzhydryl-3-phenylurea and 1-Benzhydryl-3-phenylthiourea Derivatives: New Templates among the CB1 Cannabinoid Receptor Inverse Agonists. J Med Chem 2005; 48:7486-90. [PMID: 16279809 DOI: 10.1021/jm0503906] [Citation(s) in RCA: 20] [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] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
New 1-benzhydryl-3-phenylurea derivatives and their 1-benzhydryl-3-phenylthiourea isosteres were synthesized and evaluated for their human CB1 and CB2 cannabinoid receptor affinity. These compounds proved to be selective CB1 cannabinoid receptor ligands, acting as inverse agonists in a [35S]-GTPgammaS assay. The affinity of 3,5,5'-triphenylimidazolidine-2,4-dione and 3,5,5'-triphenyl-2-thioxoimidazolidin-4-one derivatives, possessing the 1-benzhydryl-3-phenylurea and 1-benzhydryl-3-phenylthiourea moiety, respectively, was also evaluated. In conclusion, the 1-benzhydryl-3-phenylurea scaffold seems to be a new interesting template of CB1 cannabinoid receptor inverse agonists.
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Affiliation(s)
- Giulio G Muccioli
- Unité de Chimie pharmaceutique et de Radiopharmacie, Ecole de Pharmacie, Faculté de Médecine, Université catholique de Louvain, Avenue E. Mounier 73, UCL-CMFA 7340, B-1200 Bruxelles, Belgium
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41
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Muccioli GG, Martin D, Scriba GKE, Poppitz W, Poupaert JH, Wouters J, Lambert DM. Substituted 5,5'-diphenyl-2-thioxoimidazolidin-4-one as CB1 cannabinoid receptor ligands: synthesis and pharmacological evaluation. J Med Chem 2005; 48:2509-17. [PMID: 15801840 DOI: 10.1021/jm049263k] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [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: 11/29/2022]
Abstract
A set of 30 substituted 5,5'-diphenyl-2-thioxoimidazolidin-4-one (thiohydantoins) derivatives was synthesized, and their affinity for the human CB(1) cannabinoid receptor has been evaluated. These compounds are derived from the previously described cannabinoid ligands 5,5'-diphenylimidazolidine-2,4-dione (hydantoins). The replacement of the oxygen by a sulfur leads to an increase of the affinity while the function-i.e., inverse agonism-determined by [(35)S]GTPgammaS experiments remains unaffected. Finally, to evaluate the molecular parameters that could influence the affinity of the thiohydantoins, molecular electrostatic potential as well as lipophilicity calculations were undertaken on representative thiohydantoins and hydantoins derivatives. In conclusion, 5,5'-bis-(4-iodophenyl)-3-butyl-2-thioxoimidazolidin-4-one (31) and 3-allyl-5,5'-bis(4-bromophenyl)-2-thioxoimidazolidin-4-one (32) possess the highest affinity for the CB(1) cannabinoid receptor described to date for the hydantoin and thiohydantoins series when compared in a same bioassay.
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Affiliation(s)
- Giulio G Muccioli
- Unité de Chimie Pharmaceutique et de Radiopharmacie, Ecole de Pharmacie, Faculté de Médecine, Université catholique de Louvain, Avenue E. Mounier 73, UCL-CMFA 7340, B-1200 Bruxelles, Belgium
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42
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Yous S, Wallez V, Belloir M, Caignard DH, McCurdy CR, Poupaert JH. Novel 2(3H)-Benzothiazolones as Highly Potent and Selective Sigma-1 Receptor Ligands. Med Chem Res 2005. [DOI: 10.1007/s00044-005-0131-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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43
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Abstract
The opioid receptor-like 1 (ORL1) system has attracted a lot of attention owing to its diverse physiological role and by its close structural proximity toward the classical opioid receptors. Even though they share a close sequence similarity, the ligand recognition pattern for the ORL1 receptor and the classical opioid receptors remains highly distinct. In addition, functional diversification observed between the ORL1 receptor system and classical opioid receptors clearly indicates that subtle changes in the structural makeup of a receptor are enough to delineate them. A clear understanding of the structural requirements for ligand selectivity by classical opioid receptors and identification of a common "opioid binding pocket" has not been achieved yet. At this juncture, the ORL1 receptor system presents itself as a potential tool in the quest for elucidating critical elements directing ligand selectivity. The current paper is a compilation of several site-directed mutagenesis studies conducted on the ORL1 receptor system. The mutagenesis studies concentrated on the transmembrane domain residues are reported with the changes observed in terms of both binding and functional activation of the receptor. Given the critical role played by this G-protein coupled receptor, molecular level understanding of this ORL1 receptor system would aid in rational design and development of agonists and antagonists with multiple therapeutic applications.
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Affiliation(s)
- Ashok E Philip
- Department of Medicinal Chemistry, School of Pharmacy, Faser 419, The University of Mississippi, University, MS 38677, USA
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44
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Abstract
Spirohydantoins are considered privileged structures, making them attractive for the preparation of compound libraries with the potential for diverse biological activity. However, very few modifications of this scaffold have been reported to date. The spirohydantoin template was elaborated into a library of 168 compounds through a two-step solution-phase parallel synthesis starting from various N-substituted piperidinones. The Strecker reaction was employed to generate alpha-amino nitriles from aniline and TMSCN (or KCN). Subsequent reaction of the anilido nitrogen with a diverse set of isocyanates, followed by refluxing under acidic conditions, afforded the title library in high yield and purity.
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Affiliation(s)
- Marcelo J Nieto
- Department of Medicinal Chemistry and Laboratory for Applied Drug Design and Synthesis, School of Pharmacy, University of Mississippi, University, Mississippi 38677, USA
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45
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Carato P, Yous S, Sellier D, Poupaert JH, Lebegue N, Berthelot P. Efficient and selective deprotection method for N-protected 2(3H)-benzoxazolones and 2(3H)-benzothiazolones. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.08.070] [Citation(s) in RCA: 20] [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] [Indexed: 11/30/2022]
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46
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Muccioli GG, Wouters J, Poupaert JH, Norberg B, Poppitz W, Scriba GKE, Lambert DM. Versatile Access to Benzhydryl-Phenylureas through an Unexpected Rearrangement during Microwave-Enhanced Synthesis of Hydantoins. Org Lett 2003; 5:3599-602. [PMID: 14507182 DOI: 10.1021/ol035282x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] A new access to benzhydryl-phenylureas is described. These new interesting urea derivatives were obtained by reaction of substituted benzils with substituted phenylureas under microwave irradiation. Phenylthiourea, when reacted with benzil, gave 3-phenyl-thiohydantoin. Moreover, benzylurea, as phenethylurea, gave the corresponding 3-substituted hydantoin derivatives, demonstrating that only phenylurea derivatives can result in benzhydryl-phenylureas under the applied conditions. This new reaction proved to be an easy access to substituted 1-benzhydryl-3-phenyl-ureas.
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Affiliation(s)
- Giulio G Muccioli
- Unité de Chimie Pharmaceutique et de Radiopharmacie, Ecole de Pharmacie, Faculté de Médecine, Université catholique de Louvain, Avenue E. Mounier 73, UCL-CMFA 7340, B-1200 Bruxelles, Belgium
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47
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Poupaert JH, Couvreur P. A computationally derived structural model of doxorubicin interacting with oligomeric polyalkylcyanoacrylate in nanoparticles. J Control Release 2003; 92:19-26. [PMID: 14499182 DOI: 10.1016/s0168-3659(03)00177-9] [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: 10/27/2022]
Abstract
We report a molecular simulation study of doxorubicin interacting within a frame of n-butyl polycyanoacrylate, one of the most commonly encountered polymers in the production of nanoparticles. Emphasis is put on the tetrameric, hexameric and octameric oligomers (PACA's). Log P was calculated for all interacting species. Molecular dynamics along with energy minimization processes (molecular mechanics MM2, semi-empirical quantum mechanics PM3) were employed to probe the conformational behavior of doxorubicin and polyalkylcyanoacrylate both as isolated species and interacting with each other. A docked structure of protonated doxorubicin with two octamers of n-butyl polycyanoacrylate is described. Among the main stability factors of the assembly was the charge-dipole interaction representing a stabilizing contribution of -33 kcal/mol. The mechanism of aggregation and desegregation (doxorubicin release) can be summarized as follows: oligomeric PACA's are lipophilic entities that scavenge amphiphilic doxorubicin already during the polymerization process by extraction of the protonated species from the aqueous environment to the increasingly lipophilic phase of the growing PACA's. The establishment of hydrogen bonds between the ammonium N-H function and the cyano groups is noteworthy. The cohesion in PACA nanoparticle comes therefore from a blend of dipole-charge interaction, H bonds, and hydrophobic forces,
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Affiliation(s)
- Jacques H Poupaert
- Medicinal Chemistry, School of Pharmacie, Université Catholique de Louvain UCL, Avenue E. Mounier 73 (CMFA 7340), B-1200 Brussels, Belgium.
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48
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Laconde G, Carato P, Poupaert JH, Berthelot P, Depreux P, Hénichart JP. An Expeditious One-Pot Synthesis of N-Substituted 6-Nitroindoles from Indolines. Monatsh Chem 2003. [DOI: 10.1007/s00706-003-0005-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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49
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Poupaert JH, Depreux P, McCurdy CR. Unsymmetrical Diarylketones from Electron-rich Heterocyclic Arenes. Monatshefte f�r Chemie / Chemical Monthly 2003. [DOI: 10.1007/s00706-002-0573-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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50
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Muccioli GG, Poupaert JH, Wouters J, Norberg B, Poppitz W, Scriba GK, Lambert DM. A rapid and efficient microwave-assisted synthesis of hydantoins and thiohydantoins. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)00033-4] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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