1
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Ma OKF, Ronsisvalle S, Basile L, Xiang AW, Tomasella C, Sipala F, Pappalardo M, Chan KH, Milardi D, Ng RCL, Guccione S. Identification of a novel adiponectin receptor and opioid receptor dual acting agonist as a potential treatment for diabetic neuropathy. Biomed Pharmacother 2023; 158:114141. [PMID: 36542987 DOI: 10.1016/j.biopha.2022.114141] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 12/03/2022] [Accepted: 12/13/2022] [Indexed: 12/24/2022] Open
Abstract
Diabetic neuropathy (DN) is a long-term complication of diabetes mellitus, affecting different periphery nerve systems including sensory and motor neurons. Hyperglycemia is the major cause of DN with symptoms such as weakness of balance or coordination, insensitivity to sensation, weakness of the muscles as well as numbness and pain in limbs Analgesic drug such as opioids can be effective to relief neuropathy pain but there is no effective treatment. Adiponectin is an anti-diabetic adipokine, which possesses insulin-sensitizing and neuroprotective effects. In this project, we aim to identify an agent which is dual acting to opioid and adiponectin receptors. Within a virtual screening repositioning campaign, a large collection of compounds with different structures comprehensive of adipoRon-like piperidine derivatives was screened by docking. Recently developed opioid receptor benzomorphanic agonists finally emerged as good ligands to adiponectin receptors showing some 2D and 3D structural similarities with AdipoRon. Particularly, we have identified (+)-MML1017, which has high affinity to the same binding domain of AdipoR1 and AdipoR2 as AdipoRon. Our western blot results indicate (+)-MML1017 activates AMPK phosphorylation through both adipoR1 and adipoR2 in neuronal cell line. Moreover, pretreatment of (+)-MML1017 can improve the cell viability with motor neurons under hyperglycermic conditions. The (+)-MML1017 also activates μ-opioid receptor cells in a concentration-dependent manner. Our study identified a novel compound having dual activity on opioid receptors and adiponectin receptors that may have analgesic effects and neuroprotective effects to treat diabetic neuropathy.
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Affiliation(s)
- Oscar Ka-Fai Ma
- Department of Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region
| | - Simone Ronsisvalle
- Department of Drug and Health Science, University of Catania, Viale A.Doria 6 ed.2, I-95125 Catania, Italy
| | - Livia Basile
- Department of Drug and Health Science, University of Catania, Viale A.Doria 6 ed.2, I-95125 Catania, Italy
| | - Ariya Weiman Xiang
- Department of Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region
| | - Cristina Tomasella
- Department of Drug and Health Science, University of Catania, Viale A.Doria 6 ed.2, I-95125 Catania, Italy
| | - Federica Sipala
- Department of Drug and Health Science, University of Catania, Viale A.Doria 6 ed.2, I-95125 Catania, Italy
| | - Matteo Pappalardo
- Department of Drug and Health Science, University of Catania, Viale A.Doria 6 ed.2, I-95125 Catania, Italy
| | - Koon-Ho Chan
- Department of Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region
| | - Danilo Milardi
- CNR (National Research Council of Italy) - Institute of Crystallography, Via Paolo Gaifami 18, I-95126 Catania, Italy
| | - Roy Chun-Laam Ng
- Department of Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region.
| | - Salvatore Guccione
- Department of Drug and Health Science, University of Catania, Viale A.Doria 6 ed.2, I-95125 Catania, Italy.
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2
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Basile L, Guccione S. Routes to Reduce the Time and Failing in Drug Development. Curr Pharm Des 2020; 26:5661. [PMID: 33357179 DOI: 10.2174/138161282644201214093947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Livia Basile
- Department of Health and Drug Sciences University of Catania, V.le A. Doria 6 ed. 2, I-95125 Catania, Italy
| | - Salvatore Guccione
- Department of Health and Drug Sciences University of Catania, V.le A. Doria 6 ed. 2, I-95125 Catania, Italy
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3
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Abstract
Endogenous peptides as part of physiological processes are targets of interest when it comes to finding desirable therapeutics which are able to modulate molecular interactions. The major limits presented by peptides when they are used as drugs have motivated the research of the synthesis of peptidomimetics obtained through chemical modification and the use of in silico approaches. Here recent works on the discovery of peptidomimetics by computational methods are reported. Together with molecular dynamic simulations, the use of pharmacophore research simulations helps to gain insight into and understand the molecular determinants underlying the physiological processes.
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Affiliation(s)
- Cristina Tomasella
- Dipartimento di Scienze del Farmaco, University of Catania, V.le A. Doria 6, I-95125, Catania (CT), Italy
| | - Matteo Floris
- Dipartimento di Scienze Biomediche, University of Sassari, V.le S. Pietro 43/C, I-07100, Sassari (SS), Italy
| | - Salvatore Guccione
- Dipartimento di Scienze del Farmaco, University of Catania, V.le A. Doria 6, I-95125, Catania (CT), Italy
| | - Matteo Pappalardo
- Dipartimento di Scienze del Farmaco, University of Catania, V.le A. Doria 6, I-95125, Catania (CT), Italy
| | - Livia Basile
- Dipartimento di Scienze del Farmaco, University of Catania, V.le A. Doria 6, I-95125, Catania (CT), Italy
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Spadaro A, Basile L, Pappalardo M, Bonaccorso C, Rao M, Ronsisvalle S, Granata G, Guccione S. Quantum Chemical and Molecular Dynamics Studies of MUC1 Calix[4,8]arene Scaffold Based Anticancer Vaccine Candidates. J Chem Inf Model 2020; 60:5162-5171. [PMID: 32818373 DOI: 10.1021/acs.jcim.9b00989] [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
Functional antitumor vaccine constructs are the basis for active tumor immunotherapy, which is useful in the treatment of many types of cancers. MUC1 is one key glycoprotein for targeting and designing new strategies for multicomponent vaccines. Two self-adjuvant tetravalent vaccine candidates were prepared by clustering four or eight PDTRP MUC1 core epitope sequences on calixarene scaffolds. In this work, the different activities of two molecules with calix[4]arene and calix[8]arene skeleton are rationalized. Quantum mechanics, docking, and molecular dynamics structural optimization were first carried out followed by metadynamics to calculate the energy profiles. Further insights were obtained by complementarity studies of molecular fields. The molecular modeling results are in strong agreement with the experimental in vivo immunogenicity data. In conclusion, the overall data shows that, in the designing of anticancer vaccines, scaffold flexibility has a pivotal role in obtaining a suitable electrostatic, hydrophobic, and steric complementarity with the biological target.
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Affiliation(s)
- Angelo Spadaro
- Department of Drug Sciences, University of Catania, Viale A. Doria 6, I-95125 Catania, Italy
| | - Livia Basile
- Department of Drug Sciences, University of Catania, Viale A. Doria 6, I-95125 Catania, Italy
| | - Matteo Pappalardo
- Department of Drug Sciences, University of Catania, Viale A. Doria 6, I-95125 Catania, Italy
| | - Carmela Bonaccorso
- Department of Chemical Sciences, University of Catania, Viale A. Doria 6, I-95125 Catania, Italy
| | - Marco Rao
- Department of Drug Sciences, University of Catania, Viale A. Doria 6, I-95125 Catania, Italy
| | - Simone Ronsisvalle
- Department of Drug Sciences, University of Catania, Viale A. Doria 6, I-95125 Catania, Italy
| | - Giuseppe Granata
- Institute of Biomolecular Chemistry, CNR, Via P. Gaifami 18, I-95126 Catania, Italy
| | - Salvatore Guccione
- Department of Drug Sciences, University of Catania, Viale A. Doria 6, I-95125 Catania, Italy
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5
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Cesari A, Uccello Barretta G, Kirschner KN, Pappalardo M, Basile L, Guccione S, Russotto C, Lauro MR, Cavaliere F, Balzano F. Interaction of natural flavonoid eriocitrin with β-cyclodextrin and hydroxypropyl-β-cyclodextrin: an NMR and molecular dynamics investigation. NEW J CHEM 2020. [DOI: 10.1039/d0nj02022b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Eriocitrin's binding to β-cyclodextrin and hydroxypropyl-β-cyclodextrin was elucidated using mono/bidimensional NMR experiments and all-atom MD (Glycam06).
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Affiliation(s)
- Andrea Cesari
- Department of Chemistry and Industrial Chemistry
- University of Pisa
- I-56124 Pisa
- Italy
| | | | - Karl N. Kirschner
- Department of Computer Science
- University of Applied Sciences Bonn-Rhein-Sieg
- D-53757 Sankt Augustin
- Germany
| | - Matteo Pappalardo
- Department of Drug Sciences
- University of Catania
- I-95125 Catania
- Italy
| | - Livia Basile
- Department of Drug Sciences
- University of Catania
- I-95125 Catania
- Italy
| | | | - Clizia Russotto
- Department of Drug Sciences
- University of Catania
- I-95125 Catania
- Italy
| | | | - Francesca Cavaliere
- Molecular Modelling Laboratory
- Department of Food and Drug
- University of Parma
- I-43124 Parma
- Italy
| | - Federica Balzano
- Department of Chemistry and Industrial Chemistry
- University of Pisa
- I-56124 Pisa
- Italy
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6
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Gelain A, Mori M, Meneghetti F, Porta F, Basile L, Marverti G, Asai A, Hyeraci M, García-Argáez AN, Via LD, Guccione S, Villa S. Exploring the Biological Activity of a Library of 1,2,5-Oxadiazole Derivatives Endowed With Antiproliferative Activity. Anticancer Res 2018; 39:135-144. [PMID: 30591450 DOI: 10.21873/anticanres.13089] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 11/08/2018] [Revised: 11/20/2018] [Accepted: 11/21/2018] [Indexed: 11/10/2022]
Abstract
BACKGROUND/AIM The identification of a series of oxadiazole-based compounds, as promising antiproliferative agents, has been previously reported. The aim of this study was to explore the SAR of newly-synthesized oxadiazole derivatives and identify their molecular targets. MATERIALS AND METHODS A small library of 1,2,5-oxadiazole derivatives was synthetized and their antiproliferative activity was tested by the MTT assay. Their interaction with topoisomerase I was evaluated and a molecular docking study was performed. RESULTS Several candidates showed cytotoxicity towards two human tumor cell lines, HCT-116 (colorectal carcinoma) and HeLa (cervix adenocarcinoma). Some derivatives exhibited inhibitory effects on the catalytic activity of topoisomerase I and this effect was supported by docking studies. CONCLUSION The enzyme inhibition results, although not directly related to cytotoxicity, suggest that a properly modified 1,2,5 oxadiazole scaffold could be considered for the development of new anti-topoisomerase agents.
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Affiliation(s)
- Arianna Gelain
- Department of Pharmaceutical Sciences, University of Milan, Milan, Italy
| | - Matteo Mori
- Department of Pharmaceutical Sciences, University of Milan, Milan, Italy
| | | | - Federica Porta
- Department of Pharmaceutical Sciences, University of Milan, Milan, Italy
| | - Livia Basile
- Department of Drug Sciences, Section of Medicinal Chemistry, University of Catania, Catania, Italy
| | - Gaetano Marverti
- Department of Biomedical, Metabolic and Neural Sciences, Section of Pharmacology and Molecular Medicine, University of Modena and Reggio Emilia, Modena, Italy
| | - Akira Asai
- Center for Drug Discovery, Graduate School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan
| | - Mariafrancesca Hyeraci
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Padua, Italy
| | | | - Lisa Dalla Via
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Padua, Italy
| | - Salvatore Guccione
- Department of Drug Sciences, Section of Medicinal Chemistry, University of Catania, Catania, Italy
| | - Stefania Villa
- Department of Pharmaceutical Sciences, University of Milan, Milan, Italy
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7
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Ferla S, Netzler NE, Ferla S, Veronese S, Tuipulotu DE, Guccione S, Brancale A, White PA, Bassetto M. In silico screening for human norovirus antivirals reveals a novel non-nucleoside inhibitor of the viral polymerase. Sci Rep 2018. [PMID: 29515206 PMCID: PMC5841303 DOI: 10.1038/s41598-018-22303-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Human norovirus causes approximately 219,000 deaths annually, yet there are currently no antivirals available. A virtual screening of commercially available drug-like compounds (~300,000) was performed on the suramin and PPNDS binding-sites of the norovirus RNA-dependent RNA polymerase (RdRp). Selected compounds (n = 62) were examined for inhibition of norovirus RdRp activity using an in vitro transcription assay. Eight candidates demonstrated RdRp inhibition (>25% inhibition at 10 µM), which was confirmed using a gel-shift RdRp assay for two of them. The two molecules were identified as initial hits and selected for structure-activity relationship studies, which resulted in the synthesis of novel compounds that were examined for inhibitory activity. Five compounds inhibited human norovirus RdRp activity (>50% at 10 µM), with the best candidate, 54, demonstrating an IC50 of 5.6 µM against the RdRp and a CC50 of 62.8 µM. Combinational treatment of 54 and the known RdRp site-B inhibitor PPNDS revealed antagonism, indicating that 54 binds in the same binding pocket. Two RdRps with mutations (Q414A and R419A) previously shown to be critical for the binding of site-B compounds had no effect on inhibition, suggesting 54 interacts with distinct site-B residues. This study revealed the novel scaffold 54 for further development as a norovirus antiviral.
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Affiliation(s)
- Salvatore Ferla
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff, United Kingdom.
| | - Natalie E Netzler
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Sebastiano Ferla
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff, United Kingdom.,Dipartimento di Scienze del Farmaco, Università degli Studi di Catania, Catania, Italy
| | - Sofia Veronese
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff, United Kingdom
| | - Daniel Enosi Tuipulotu
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Salvatore Guccione
- Dipartimento di Scienze del Farmaco, Università degli Studi di Catania, Catania, Italy
| | - Andrea Brancale
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff, United Kingdom
| | - Peter A White
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Marcella Bassetto
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff, United Kingdom
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8
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Sonmez F, Zengin Kurt B, Gazioglu I, Basile L, Dag A, Cappello V, Ginex T, Kucukislamoglu M, Guccione S. Design, synthesis and docking study of novel coumarin ligands as potential selective acetylcholinesterase inhibitors. J Enzyme Inhib Med Chem 2017; 32:285-297. [PMID: 28097911 PMCID: PMC6010140 DOI: 10.1080/14756366.2016.1250753] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [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: 06/09/2016] [Revised: 10/13/2016] [Accepted: 10/16/2016] [Indexed: 11/20/2022] Open
Abstract
New coumaryl-thiazole derivatives with the acetamide moiety as a linker between the alkyl chains and/or the heterocycle nucleus were synthesized and in vitro tested as acetylcholinesterase (AChE) inhibitors. 2-(diethylamino)-N-(4-(2-oxo-2H-chromen-3-yl)thiazol-2-yl)acetamide (6c, IC50 value of 43 nM) was the best AChE inhibitor with a selectivity index of 4151.16 over BuChE. Kinetic study of AChE inhibition revealed that 6c was a mixed-type inhibitor. Moreover, the result of H4IIE hepatoma cell toxicity assay for 6c showed negligible cell death. Molecular docking studies were also carried out to clarify the inhibition mode of the more active compounds. Best pose of compound 6c is positioned into the active site with the coumarin ring wedged between the residues of the CAS and catalytic triad of AChE. In addition, the coumarin ring is anchored into the gorge of the enzyme by H-bond with Tyr130.
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Affiliation(s)
- Fatih Sonmez
- Pamukova Vocational High School, Sakarya University, Sakarya, Turkey
| | - Belma Zengin Kurt
- Department of Analytical and Pharmaceutical Chemistry, Faculty of Pharmacy, Bezmialem Vakif University, Istanbul, Turkey
| | - Isil Gazioglu
- Department of Analytical and Pharmaceutical Chemistry, Faculty of Pharmacy, Bezmialem Vakif University, Istanbul, Turkey
| | - Livia Basile
- Department of Drug Sciences, University of Catania, Città Universitaria, Catania, Italy
| | - Aydan Dag
- Department of Analytical and Pharmaceutical Chemistry, Faculty of Pharmacy, Bezmialem Vakif University, Istanbul, Turkey
| | - Valentina Cappello
- Department of Drug Sciences, University of Catania, Città Universitaria, Catania, Italy
| | - Tiziana Ginex
- Molecular Modelling Laboratory, Department of Food Science, University of Parma, Parma, Italy
| | - Mustafa Kucukislamoglu
- Faculty of Arts and Science, Department of Chemistry, Sakarya University, Sakarya, Turkey
| | - Salvatore Guccione
- Department of Drug Sciences, University of Catania, Città Universitaria, Catania, Italy
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9
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Crascì L, Basile L, Panico A, Puglia C, Bonina FP, Basile PM, Rizza L, Guccione S. Correlating In Vitro Target-Oriented Screening and Docking: Inhibition of Matrix Metalloproteinases Activities by Flavonoids. Planta Med 2017; 83:901-911. [PMID: 28288492 DOI: 10.1055/s-0043-104775] [Citation(s) in RCA: 15] [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] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Metalloproteases are a family of zinc-containing endopeptidases involved in a variety of pathological disorders. The use of flavonoid derivatives as potential metalloprotease inhibitors has recently increased.Particular plants growing in Sicily are an excellent yielder of the flavonoids luteolin, apigenin, and their respective glycoside derivatives (7-O-rutinoside, 7-O-glucoside, and 7-O-glucuronide).The inhibitory activity of luteolin, apigenin, and their respective glycoside derivatives on the metalloproteases MMP-1, MMP-3, MMP-13, MMP-8, and MMP-9 was assessed and rationalized correlating in vitro target-oriented screening and in silico docking.The flavones apigenin, luteolin, and their respective glucosides have good ability to interact with metalloproteases and can also be lead compounds for further development. Glycones are more active on MMP-1, -3, -8, and -13 than MMP-9. Collagenases MMP-1, MMP-8, and MMP-13 are inhibited by compounds having rutinoside glycones. Apigenin and luteolin are inactive on MMP-1, -3, and -8, which can be interpreted as a better selectivity for both -9 and -13 peptidases. The more active compounds are apigenin-7-O-rutinoside on MMP-1 and luteolin-7-O-rutinoside on MMP-3. The lowest IC50 values were also found for apigenin-7-O-glucuronide, apigenin-7-O-rutinoside, and luteolin-7-O-glucuronide. The glycoside moiety might allow for a better anchoring to the active site of MMP-1, -3, -8, -9, and -13. Overall, the in silico data are substantially in agreement with the in vitro ones (fluorimetric assay).
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Affiliation(s)
- Lucia Crascì
- Dipartimento di Scienze del Farmaco, Università degli Studi di Catania, Catania, Italy
| | - Livia Basile
- Dipartimento di Scienze del Farmaco, Università degli Studi di Catania, Catania, Italy
| | - Annamaria Panico
- Dipartimento di Scienze del Farmaco, Università degli Studi di Catania, Catania, Italy
| | - Carmelo Puglia
- Dipartimento di Scienze del Farmaco, Università degli Studi di Catania, Catania, Italy
| | - Francesco P Bonina
- Dipartimento di Scienze del Farmaco, Università degli Studi di Catania, Catania, Italy
| | | | - Luisa Rizza
- Bionap s. r. l., Contrada Fureria, Belpasso, Italy
| | - Salvatore Guccione
- Dipartimento di Scienze del Farmaco, Università degli Studi di Catania, Catania, Italy
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10
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Porta F, Gelain A, Barlocco D, Ferri N, Marchianò S, Cappello V, Basile L, Guccione S, Meneghetti F, Villa S. A field-based disparity analysis of new 1,2,5-oxadiazole derivatives endowed with antiproliferative activity. Chem Biol Drug Des 2017; 90:820-839. [DOI: 10.1111/cbdd.13003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 04/07/2017] [Accepted: 04/08/2017] [Indexed: 12/17/2022]
Affiliation(s)
- Federica Porta
- Dipartimento di Scienze Farmaceutiche; Università degli Studi di Milano; Milan Italy
| | - Arianna Gelain
- Dipartimento di Scienze Farmaceutiche; Università degli Studi di Milano; Milan Italy
| | - Daniela Barlocco
- Dipartimento di Scienze Farmaceutiche; Università degli Studi di Milano; Milan Italy
| | - Nicola Ferri
- Dipartimento di Scienze del Farmaco; Università degli Studi di Padova; Padua Italy
| | - Silvia Marchianò
- Dipartimento di Scienze Farmacologiche e Biomolecolari; Università degli Studi di Milano; Milan Italy
| | - Valentina Cappello
- Dipartimento di Scienze del Farmaco; Università degli Studi di Catania; Catania Italy
| | - Livia Basile
- Dipartimento di Scienze del Farmaco; Università degli Studi di Catania; Catania Italy
| | - Salvatore Guccione
- Dipartimento di Scienze del Farmaco; Università degli Studi di Catania; Catania Italy
| | - Fiorella Meneghetti
- Dipartimento di Scienze Farmaceutiche; Università degli Studi di Milano; Milan Italy
| | - Stefania Villa
- Dipartimento di Scienze Farmaceutiche; Università degli Studi di Milano; Milan Italy
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11
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Pappalardo M, Rayan M, Abu-Lafi S, Leonardi ME, Milardi D, Guccione S, Rayan A. Homology-based Modeling of Rhodopsin-like Family Members in the Inactive State: Structural Analysis and Deduction of Tips for Modeling and Optimization. Mol Inform 2017; 36. [PMID: 28375549 DOI: 10.1002/minf.201700014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [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: 01/23/2017] [Accepted: 03/14/2017] [Indexed: 12/12/2022]
Abstract
Modeling G-Protein Coupled Receptors (GPCRs) is an emergent field of research, since utility of high-quality models in receptor structure-based strategies might facilitate the discovery of interesting drug candidates. The findings from a quantitative analysis of eighteen resolved structures of rhodopsin family "A" receptors crystallized with antagonists and 153 pairs of structures are described. A strategy termed endeca-amino acids fragmentation was used to analyze the structures models aiming to detect the relationship between sequence identity and Root Mean Square Deviation (RMSD) at each trans-membrane-domain. Moreover, we have applied the leave-one-out strategy to study the shiftiness likelihood of the helices. The type of correlation between sequence identity and RMSD was studied using the aforementioned set receptors as representatives of membrane proteins and 98 serine proteases with 4753 pairs of structures as representatives of globular proteins. Data analysis using fragmentation strategy revealed that there is some extent of correlation between sequence identity and global RMSD of 11AA width windows. However, spatial conservation is not always close to the endoplasmic side as was reported before. A comparative study with globular proteins shows that GPCRs have higher standard deviation and higher slope in the graph with correlation between sequence identity and RMSD. The extracted information disclosed in this paper could be incorporated in the modeling protocols while using technique for model optimization and refinement.
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Affiliation(s)
- Matteo Pappalardo
- Department of Drug Sciences.,Department of Chemical Sciences -, University of Catania -, V.le A.Doria 6, I-95125, Catania, Italy
| | - Mahmoud Rayan
- Institute of Applied Research - Galilee Society, Galeel street, Shefa-Amr, 20200, Israel
| | - Saleh Abu-Lafi
- Faculty of Pharmacy, Al-Quds University, Abu-Dies, Palestine
| | | | - Danilo Milardi
- National Research Council, Institute of Biostructures and Bioimages, Via. P. Gaifami 18, 95126, Catania, Italy
| | | | - Anwar Rayan
- Institute of Applied Research - Galilee Society, Galeel street, Shefa-Amr, 20200, Israel.,Drug Discovery Informatics Lab, Qasemi-Research Center, Al-Qasemi Academic College, Baka El-Garbiah, 30100, Israel
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12
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Shahaf N, Pappalardo M, Basile L, Guccione S, Rayan A. How to Choose the Suitable Template for Homology Modelling of GPCRs: 5-HT7 Receptor as a Test Case. Mol Inform 2016; 35:414-23. [PMID: 27546045 DOI: 10.1002/minf.201501029] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [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: 12/09/2015] [Accepted: 05/19/2016] [Indexed: 01/06/2023]
Abstract
G protein-coupled receptors (GPCRs) are a super-family of membrane proteins that attract great pharmaceutical interest due to their involvement in almost every physiological activity, including extracellular stimuli, neurotransmission, and hormone regulation. Currently, structural information on many GPCRs is mainly obtained by the techniques of computer modelling in general and by homology modelling in particular. Based on a quantitative analysis of eighteen antagonist-bound, resolved structures of rhodopsin family "A" receptors - also used as templates to build 153 homology models - it was concluded that a higher sequence identity between two receptors does not guarantee a lower RMSD between their structures, especially when their pair-wise sequence identity (within trans-membrane domain and/or in binding pocket) lies between 25 % and 40 %. This study suggests that we should consider all template receptors having a sequence identity ≤50 % with the query receptor. In fact, most of the GPCRs, compared to the currently available resolved structures of GPCRs, fall within this range and lack a correlation between structure and sequence. When testing suitability for structure-based drug design, it was found that choosing as a template the most similar resolved protein, based on sequence resemblance only, led to unsound results in many cases. Molecular docking analyses were carried out, and enrichment factors as well as attrition rates were utilized as criteria for assessing suitability for structure-based drug design.
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Affiliation(s)
- Nir Shahaf
- Drug Discovery Informatics Lab, Qasemi-Research Center, Al-Qasemi Academic College, Baka El-Garbiah, 30100, Israel
| | - Matteo Pappalardo
- Department of Drug Sciences . .,Department of Chemical Sciences -, University of Catania -, V.leA.Doria 6, I-95125, Catania, Italy.
| | | | | | - Anwar Rayan
- Drug Discovery Informatics Lab, Qasemi-Research Center, Al-Qasemi Academic College, Baka El-Garbiah, 30100, Israel, . .,Institute of Applied Research, Galilee Society, Shefa-Amr, 20200, Israel.
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Merlo S, Basile L, Giuffrida ML, Sortino MA, Guccione S, Copani A. Identification of 5-Methoxyflavone as a Novel DNA Polymerase-Beta Inhibitor and Neuroprotective Agent against Beta-Amyloid Toxicity. J Nat Prod 2015; 78:2704-2711. [PMID: 26517378 DOI: 10.1021/acs.jnatprod.5b00621] [Citation(s) in RCA: 17] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Cell-cycle reactivation is a core feature of degenerating neurons in Alzheimer's disease (AD) and Parkinson's disease (PD). A variety of stressors, including β-amyloid (Aβ) in the case of AD, can force neurons to leave quiescence and to initiate an ectopic DNA replication process, leading to neuronal death rather than division. As the primary polymerase (pol) involved in neuronal DNA replication, DNA pol-β contributes to neuronal death, and DNA pol-β inhibitors may prove to be effective neuroprotective agents. Currently, specific and highly active DNA pol-β inhibitors are lacking. Nine putative DNA pol-β inhibitors were identified in silico by querying the ZINC database, containing more than 35 million purchasable compounds. Following pharmacological evaluation, only 5-methoxyflavone (1) was validated as an inhibitor of DNA pol-β activity. Cultured primary neurons are a useful model to investigate the neuroprotective effects of potential DNA pol-β inhibitors, since these neurons undergo DNA replication and death when treated with Aβ. Consistent with the inhibition of DNA pol-β, 5-methoxyflavone (1) reduced the number of S-phase neurons and the ensuing apoptotic death triggered by Aβ. 5-Methoxyflavone (1) is the first flavonoid compound able to halt neurodegeneration via a definite molecular mechanism rather than through general antioxidant and anti-inflammatory properties.
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Affiliation(s)
| | | | - Maria Laura Giuffrida
- Institute of Biostructure and Bioimaging, National Research Council (CNR) , Catania, Italy
| | | | | | - Agata Copani
- Institute of Biostructure and Bioimaging, National Research Council (CNR) , Catania, Italy
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Kurt BZ, Gazioglu I, Basile L, Sonmez F, Ginex T, Kucukislamoglu M, Guccione S. Potential of aryl–urea–benzofuranylthiazoles hybrids as multitasking agents in Alzheimer's disease. Eur J Med Chem 2015; 102:80-92. [DOI: 10.1016/j.ejmech.2015.07.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 05/18/2015] [Accepted: 07/02/2015] [Indexed: 12/14/2022]
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Carletta A, Tilborg A, Moineaux L, de Ruyck J, Basile L, Salerno L, Romeo G, Wouters J, Guccione S. How does binding of imidazole-based inhibitors to heme oxygenase-1 influence their conformation? Insights combining crystal structures and molecular modelling. Acta Crystallogr B Struct Sci Cryst Eng Mater 2015. [DOI: 10.1107/s2052520615010410] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Heme oxygenase-1 (HO-1) inhibition is associated with antitumor activity. Imidazole-based analogues show effective and selective inhibitory potency of HO-1. In this work, five single-crystal structures of four imidazole-based compounds are presented, with an in-depth structural analysis. In order to study the influence of the conformation of the ligands on binding to protein, conformational data from crystallography are compared with quantum mechanics analysis and molecular docking studies. Molecular docking of imidazole-based analogues in the active site of HO-1 is in good agreement with the experimental structures. Inhibitors interact with the heme cofactor and a hydrophobic pocket (Met34, Phe37, Val50, Leu147 and Phe214) in the HO-1 binding site. An alternate binding mode can be hypothesized for some inhibitors in the series.
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16
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Impellizzeri AAR, Pappalardo M, Basile L, Manfra O, Andressen KW, Krobert KA, Messina A, Levy FO, Guccione S. Identification of essential residues for binding and activation in the human 5-HT7(a) serotonin receptor by molecular modeling and site-directed mutagenesis. Front Behav Neurosci 2015; 9:92. [PMID: 26005408 PMCID: PMC4424842 DOI: 10.3389/fnbeh.2015.00092] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Accepted: 03/31/2015] [Indexed: 11/23/2022] Open
Abstract
The human 5-HT7 receptor is expressed in both the central nervous system and peripheral tissues and is a potential drug target in behavioral and psychiatric disorders. We examined molecular determinants of ligand binding and G protein activation by the human 5-HT7(a) receptor. The role of several key residues in the 7th transmembrane domain (TMD) and helix 8 were elucidated combining in silico and experimental mutagenesis. Several single and two double point mutations of the 5-HT7(a) wild type receptor were made (W7.33V, E7.35T, E7.35R, E7.35D, E7.35A, R7.36V, Y7.43A, Y7.43F, Y7.43T, R8.52D, D8.53K; E7.35T-R7.36V, R8.52D-D8.53K), and their effects upon ligand binding were assessed by radioligand binding using a potent agonist (5-CT) and a potent antagonist (SB269970). In addition, the ability of the mutated 5-HT7(a) receptors to activate G protein after 5-HT-stimulation was determined through activation of adenylyl cyclase. In silico investigation on mutated receptors substantiated the predicted importance of TM7 and showed critical roles of residues E7.35, W7.33, R7.36 and Y7.43 in agonist and antagonist binding and conformational changes of receptor structure affecting adenylyl cyclase activation. Experimental data showed that mutants E7.35T and E7.35R were incapable of ligand binding and adenylyl cyclase activation, consistent with a requirement for a negatively charged residue at this position. The mutant R8.52D was unable to activate adenylyl cyclase, despite unaffected ligand binding, consistent with the R8.52 residue playing an important role in the receptor-G protein interface. The mutants Y7.43A and Y7.43T displayed reduced agonist binding and AC agonist potency, not seen in Y7.43F, consistent with a requirement for an aromatic residue at this position. Knowledge of the molecular interactions important in h5-HT7 receptor ligand binding and G protein activation will aid the design of selective h5-HT7 receptor ligands for potential pharmacological use.
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Affiliation(s)
- Agata Antonina Rita Impellizzeri
- Department of Pharmacology, Institute of Clinical Medicine, University of Oslo and Oslo University Hospital Oslo, Norway ; K.G. Jebsen Cardiac Research Centre and Center for Heart Failure Research, Faculty of Medicine, University of Oslo Oslo, Norway ; Section of Biochemistry and Molecular Biology, Department of Biological, Geological and Environmental Sciences, University of Catania Catania, Italy
| | - Matteo Pappalardo
- Department of Drug Sciences, University of Catania Catania, Italy ; Department of Chemical Sciences, University of Catania Catania, Italy
| | - Livia Basile
- Department of Drug Sciences, University of Catania Catania, Italy
| | - Ornella Manfra
- Department of Pharmacology, Institute of Clinical Medicine, University of Oslo and Oslo University Hospital Oslo, Norway ; K.G. Jebsen Cardiac Research Centre and Center for Heart Failure Research, Faculty of Medicine, University of Oslo Oslo, Norway
| | - Kjetil Wessel Andressen
- Department of Pharmacology, Institute of Clinical Medicine, University of Oslo and Oslo University Hospital Oslo, Norway ; K.G. Jebsen Cardiac Research Centre and Center for Heart Failure Research, Faculty of Medicine, University of Oslo Oslo, Norway
| | - Kurt Allen Krobert
- Department of Pharmacology, Institute of Clinical Medicine, University of Oslo and Oslo University Hospital Oslo, Norway ; K.G. Jebsen Cardiac Research Centre and Center for Heart Failure Research, Faculty of Medicine, University of Oslo Oslo, Norway
| | - Angela Messina
- Section of Biochemistry and Molecular Biology, Department of Biological, Geological and Environmental Sciences, University of Catania Catania, Italy ; Section of Catania, National Institute of Biostructures and Biosystems Catania, Italy
| | - Finn Olav Levy
- Department of Pharmacology, Institute of Clinical Medicine, University of Oslo and Oslo University Hospital Oslo, Norway ; K.G. Jebsen Cardiac Research Centre and Center for Heart Failure Research, Faculty of Medicine, University of Oslo Oslo, Norway
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Pappalardo M, Shachaf N, Basile L, Milardi D, Zeidan M, Raiyn J, Guccione S, Rayan A. Sequential application of ligand and structure based modeling approaches to index chemicals for their hH4R antagonism. PLoS One 2014; 9:e109340. [PMID: 25330207 PMCID: PMC4199621 DOI: 10.1371/journal.pone.0109340] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Accepted: 09/10/2014] [Indexed: 02/03/2023] Open
Abstract
The human histamine H4 receptor (hH4R), a member of the G-protein coupled receptors (GPCR) family, is an increasingly attractive drug target. It plays a key role in many cell pathways and many hH4R ligands are studied for the treatment of several inflammatory, allergic and autoimmune disorders, as well as for analgesic activity. Due to the challenging difficulties in the experimental elucidation of hH4R structure, virtual screening campaigns are normally run on homology based models. However, a wealth of information about the chemical properties of GPCR ligands has also accumulated over the last few years and an appropriate combination of these ligand-based knowledge with structure-based molecular modeling studies emerges as a promising strategy for computer-assisted drug design. Here, two chemoinformatics techniques, the Intelligent Learning Engine (ILE) and Iterative Stochastic Elimination (ISE) approach, were used to index chemicals for their hH4R bioactivity. An application of the prediction model on external test set composed of more than 160 hH4R antagonists picked from the chEMBL database gave enrichment factor of 16.4. A virtual high throughput screening on ZINC database was carried out, picking ∼ 4000 chemicals highly indexed as H4R antagonists' candidates. Next, a series of 3D models of hH4R were generated by molecular modeling and molecular dynamics simulations performed in fully atomistic lipid membranes. The efficacy of the hH4R 3D models in discrimination between actives and non-actives were checked and the 3D model with the best performance was chosen for further docking studies performed on the focused library. The output of these docking studies was a consensus library of 11 highly active scored drug candidates. Our findings suggest that a sequential combination of ligand-based chemoinformatics approaches with structure-based ones has the potential to improve the success rate in discovering new biologically active GPCR drugs and increase the enrichment factors in a synergistic manner.
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Affiliation(s)
- Matteo Pappalardo
- Department of Chemical Sciences, University of Catania, Catania, Italy
| | - Nir Shachaf
- Drug Discovery Informatics Lab, QRC-Qasemi Research Center, Al-Qasemi Academic College, Baka El-Garbiah, Israel
| | - Livia Basile
- Etnalead s.r.l., Scuola Superiore di Catania, University of Catania, Catania, Italy
| | - Danilo Milardi
- National Research Council, Institute of Biostructures and Bioimaging, Catania, Italy
| | - Mouhammed Zeidan
- Drug Discovery Informatics Lab, QRC-Qasemi Research Center, Al-Qasemi Academic College, Baka El-Garbiah, Israel
| | - Jamal Raiyn
- Drug Discovery Informatics Lab, QRC-Qasemi Research Center, Al-Qasemi Academic College, Baka El-Garbiah, Israel
| | - Salvatore Guccione
- Etnalead s.r.l., Scuola Superiore di Catania, University of Catania, Catania, Italy
- Department of Pharmaceutical Sciences, University of Catania, Catania, Italy
| | - Anwar Rayan
- Drug Discovery Informatics Lab, QRC-Qasemi Research Center, Al-Qasemi Academic College, Baka El-Garbiah, Israel
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Basile L, Pappalardo M, Guccione S, Milardi D, Ramsay RR. Correction to Computational Comparison of Imidazoline Association with the I2 Binding Site in Human Monoamine Oxidases. J Chem Inf Model 2014. [DOI: 10.1021/ci5003747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Basile L, Pappalardo M, Guccione S, Milardi D, Ramsay RR. Computational Comparison of Imidazoline Association with the I2 Binding Site in Human Monoamine Oxidases. J Chem Inf Model 2014; 54:1200-7. [DOI: 10.1021/ci400346k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [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)
- Livia Basile
- Etnalead
s.r.l., c/o EtnaBuilding, Scuola Superiore di Catania, Università degli Studi di Catania, via S. Nullo 5/i, I-95123 Catania, Italy
| | - Matteo Pappalardo
- Dipartimento
di Scienze Chimiche, Università degli Studi di Catania, Viale
A.Doria 6 Ed.3, Città Universitaria, I- 95125 Catania, Italy
| | - Salvatore Guccione
- Etnalead
s.r.l., c/o EtnaBuilding, Scuola Superiore di Catania, Università degli Studi di Catania, via S. Nullo 5/i, I-95123 Catania, Italy
- Dipartimento
di Scienze del Farmaco, Università degli Studi di Catania, Viale A.Doria 6 Ed. 2, Città Universitaria, I-95125 Catania, Italy
| | - Danilo Milardi
- IBB-CNR,
Istituto di Biostrutture e Bioimmagini, UOS di Catania c/o Dipartimento
di Scienze Chimiche, Università degli Studi di Catania, Viale
A.Doria 6 Ed.3, Città Universitaria, I- 95125 Catania, Italy
| | - Rona R. Ramsay
- Biomedical
Sciences Research Complex, University of St. Andrews, North Haugh, St. Andrews KY16 8QP, U.K
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Mondal D, Li SY, Bellucci L, Laino T, Tafi A, Guccione S, Lepore SD. Stereoretentive chlorination of cyclic alcohols catalyzed by titanium(IV) tetrachloride: evidence for a front side attack mechanism. J Org Chem 2013; 78:2118-27. [PMID: 23298402 PMCID: PMC3586301 DOI: 10.1021/jo3023439] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [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: 11/30/2022]
Abstract
A mild chlorination reaction of alcohols was developed using the classical thionyl chloride reagent but with added catalytic titanium(IV) chloride. These reactions proceeded rapidly to afford chlorination products in excellent yields and with preference for retention of configuration. Stereoselectivities were high for a variety of chiral cyclic secondary substrates including sterically hindered systems. Chlorosulfites were first generated in situ and converted to alkyl chlorides by the action of titanium tetrachloride which is thought to chelate the chlorosulfite leaving group and deliver the halogen nucleophile from the front face. To better understand this novel reaction pathway, an ab initio study was undertaken at the DFT level of theory using two different computational approaches. This computational evidence suggests that while the reaction proceeds through a carbocation intermediate, this charged species likely retains pyramidal geometry existing as a conformational isomer stabilized through hyperconjugation (hyperconjomers). These carbocations are then essentially "frozen" in their original configurations at the time of nucleophilic capture.
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Affiliation(s)
- Deboprosad Mondal
- Department of Chemistry, Florida Atlantic University, Boca Raton, Florida 33431
| | - Song Ye Li
- Department of Chemistry, Florida Atlantic University, Boca Raton, Florida 33431
| | - Luca Bellucci
- Center S3, CNR Institute of Nanoscience, Via Campi 213/A, I-41125 Modena, Italy
| | - Teodoro Laino
- IBM Zurich Research Laboratory, CH-8803 Rüeschlikon, Switzerland
| | - Andrea Tafi
- Dipartimento Farmaco Chimico Tecnologico, Università degli Studi di Siena, I-53100 Siena, Italy
| | - Salvatore Guccione
- Dipartimento di Scienze del Farmaco, Università degli Studi di Catania, I-95125 Catania, Italy
| | - Salvatore D. Lepore
- Department of Chemistry, Florida Atlantic University, Boca Raton, Florida 33431
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Sorrenti V, Guccione S, Di Giacomo C, Modica MN, Pittalà V, Acquaviva R, Basile L, Pappalardo M, Salerno L. Evaluation of Imidazole-Based Compounds as Heme Oxygenase-1 Inhibitors. Chem Biol Drug Des 2012; 80:876-86. [DOI: 10.1111/cbdd.12015] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Basile L, Alvarez S, Blanco A, Santagati A, Granata G, Di Pietro P, Guccione S, Muñoz-Fernández MÁ. Sulfonilamidothiopyrimidone and thiopyrimidone derivatives as selective COX-2 inhibitors: synthesis, biological evaluation, and docking studies. Eur J Med Chem 2012; 57:149-61. [PMID: 23047231 DOI: 10.1016/j.ejmech.2012.09.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2012] [Revised: 08/29/2012] [Accepted: 09/03/2012] [Indexed: 01/22/2023]
Abstract
Newly synthesized sulfonilamidothiopyrimidone derivatives and a subset of 14 sulfonilamidothiopyrimidones and thiopyrimidones selected by an MTT assays cell viability guided selection from an in house collection were evaluated to determine the inhibitory effect on the PGE(2) formation in human peripheral blood lymphocytes (PBLs) using commercial ELISA. The newly synthesized sulfonilamidothiopyrimidone derivatives showed interesting pharmacological activities. Preliminary in vitro assays showed that compounds 2-5 are endowed with very high activity. Compound 2 was the most active as hCOX-2 inhibitor. The observed effects were not due to an inhibition of cell proliferation as proved by the BrdU assay. Western blot of COX-2 confirmed the inhibition on the PGE(2) secretion. Further evidence on the inhibitory potential and selectivity as COX-2 inhibitors of the selected compounds came from the in vitro screening. In order to better rationalize the action and the binding mode of these compounds, docking studies were carried out. These studies were in agreement with the biological data. Compounds 2-5 were able to fit into the active site of COX-2 with highest scores and interaction energies. Furthermore, compound 2, which showed an inhibition of around 50% on PGE(2) production, was the best scored in all the docking calculations carried out.
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Affiliation(s)
- Livia Basile
- EtnaLead s.r.l., c/o Etnabuilding, Scuola Superiore di Catania, via S. Nullo 5/i, I-95123 Catania, Italy
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Hundt W, Steinbach S, Burbelko M, Kiessling A, Rominger M, O'Connell-Rodwell CE, Mayer D, Bednarski MD, Guccione S. Induction of luciferase activity under the control of an hsp70 promoter using high-intensity focused ultrasound: combination of bioluminescence and MRI imaging in three different tumour models. Technol Cancer Res Treat 2011; 10:197-210. [PMID: 21381798 DOI: 10.7785/tcrt.2012.500195] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The in vivo temporal changes of luciferase activity were investigated under the control of an hsp70 promoter in three tumour models after the application of different intensities of high-intensity focused ultrasound (HIFU). Three cell lines, SCCVII, NIH3T3 and M21 were stably transfected with a plasmid containing the hsp70 promoter and luciferase reporter gene, and tumours were subcutaneously initiated into mice. At a size of 1300 ± 234 mm(3), the tumours were exposed to five intensities of continuous HIFU (802-1401-2157-3067-4133 W/cm(2)) for 20 sec. Bioluminescence and MR imaging were performed to assess luciferase activity and signal intensity changes in the tissue. The MRI scan protocol was pre- and post-contrast T1-wt-SE, T2-wt-FSE, DCE-MRI, diffusion-wt STEAM sequence, T2 relaxation time determination obtained on a 1.5-T GE MRI scanner. The NIH3T3 tumours showed the highest luciferase activity of 328.1 ± 7.1 fold at 24 h at a HIFU intensity of 3067 W/cm(2), the M21 tumours of 3.2 ± 0.6 fold 8 hours and the SCCVII tumours 2.9 ± 0.9 fold 4 hours post-HIFU at 2157 W/cm(2). The greatest increase in T2 signal intensity and T2 relaxation time of 20.7 ± 3.4% was seen in the SCCVII tumours. The highest contrast medium uptake of 10.1 ± 1.1% was noted in the M21 tumours, and 14.8 ± 1.9% in the SCCVII tumours. In all tumours, a significant increase in the diffusion coefficient was seen with increased HIFU intensity, the highest of which was 40.3 ± 4.1% in the SCCVII tumours. The three tumour cell lines stably transfected with the hsp70/luciferase gene showed differential luciferase activity, which peaked at different times after the application of HIFU and was dependant on tumour type and HIFU energy deposition.
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Affiliation(s)
- W Hundt
- Department of Radiology, Lucas MRS Research Center, Stanford School of Medicine, Stanford, CA 94305, USA.
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Berrade L, Aisa B, Ramirez MJ, Galiano S, Guccione S, Moltzau LR, Levy FO, Nicoletti F, Battaglia G, Molinaro G, Aldana I, Monge A, Perez-Silanes S. Novel Benzo[b]thiophene Derivatives as New Potential Antidepressants with Rapid Onset of Action. J Med Chem 2011; 54:3086-90. [DOI: 10.1021/jm2000773] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Luis Berrade
- Unidad en Investigación y Desarrollo de Medicamentos, Centro de Investigación en Farmacobiología Aplicada (CIFA), University of Navarra, C/Irunlarrea 1, 31080 Pamplona, Spain
- Dipartimento di Scienze del Farmaco, University of Catania, V. le Andrea Doria 6 Ed, 2 Città Universitaria, I-95125, Catania, Italy
| | - Bárbara Aisa
- Department of Pharmacology, University of Navarra, C/Irunlarrea 1, 31080 Pamplona, Spain
| | - María J. Ramirez
- Department of Pharmacology, University of Navarra, C/Irunlarrea 1, 31080 Pamplona, Spain
| | - Silvia Galiano
- Unidad en Investigación y Desarrollo de Medicamentos, Centro de Investigación en Farmacobiología Aplicada (CIFA), University of Navarra, C/Irunlarrea 1, 31080 Pamplona, Spain
| | - Salvatore Guccione
- Dipartimento di Scienze del Farmaco, University of Catania, V. le Andrea Doria 6 Ed, 2 Città Universitaria, I-95125, Catania, Italy
| | - Lise Román Moltzau
- Department of Pharmacology, University of Oslo and Oslo University Hospital, N-0316 Oslo, Norway
| | - Finn Olav Levy
- Department of Pharmacology, University of Oslo and Oslo University Hospital, N-0316 Oslo, Norway
| | - Ferdinando Nicoletti
- I.R.C.C.S. Instituto Neurologico Mediterraneo Neuromed, Localitá Camerelle, 86077 Pozzilli (IS), Italy
- Department of Physiology and Pharmacology, University of Rome Sapienza, Italy
| | - Giuseppe Battaglia
- Department of Physiology and Pharmacology, University of Rome Sapienza, Italy
| | - Gemma Molinaro
- Department of Physiology and Pharmacology, University of Rome Sapienza, Italy
| | - Ignacio Aldana
- Unidad en Investigación y Desarrollo de Medicamentos, Centro de Investigación en Farmacobiología Aplicada (CIFA), University of Navarra, C/Irunlarrea 1, 31080 Pamplona, Spain
| | - Antonio Monge
- Unidad en Investigación y Desarrollo de Medicamentos, Centro de Investigación en Farmacobiología Aplicada (CIFA), University of Navarra, C/Irunlarrea 1, 31080 Pamplona, Spain
| | - Silvia Perez-Silanes
- Unidad en Investigación y Desarrollo de Medicamentos, Centro de Investigación en Farmacobiología Aplicada (CIFA), University of Navarra, C/Irunlarrea 1, 31080 Pamplona, Spain
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Hundt W, O'Connell-Rodwell C, Mayer D, Guccione S. In Vivo Beurteilung der Luciferaseaktivität nach Anwendung von Fokussiertem Ultraschall. ROFO-FORTSCHR RONTG 2011. [DOI: 10.1055/s-0031-1279359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Castriciano MA, Romeo A, Angelini N, Micali N, Guccione S, Scolaro LM. Spectroscopic investigation and molecular modeling on porphyrin/PAMAM supramolecular adduct. Photochem Photobiol 2010; 87:292-301. [PMID: 21138442 DOI: 10.1111/j.1751-1097.2010.00872.x] [Citation(s) in RCA: 4] [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] [Indexed: 01/26/2023]
Abstract
Noncovalent adducts (TPPC@PAMAM) between meso-tetrakis(4-carboxyphenyl)porphyrin (TPPC) and polyamidoamine PAMAM dendrimer (generation 2.0) have been obtained by simply mixing the two components at different stoichiometric amount. The resulting species are readily soluble and stable in aqueous solution up to millimolar concentration. Electrostatic interactions between the anionic carboxylate groups of TPPC and the protonated amino groups of the PAMAM dendrimer play an important role in the stabilization of these adducts. UV/Vis absorption, steady state and time-resolved fluorescence emission and anisotropy measurements suggest the presence of equilibria involving different species as function of the [PAMAM]/[TPPC] ratio. At low ratios the observed spectroscopic behavior evidence the presence of H-aggregates, while at higher ratios well-defined species containing monomeric TPPC strongly interacting with the charged dendrimer are formed. Docking of the binary supramolecular adduct further supports the experimental results showing a favorable interaction with the porphyrin being completely included in the dendrimer. The interaction of the binary TPPC@PAMAM adduct (1/1 ratio) with calf-thymus DNA has been investigated through spectroscopic and photophysical techniques. All the experimental results point to the formation of a ternary complex between the binary adduct and the DNA backbone.
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Hundt WH, O'Connell-Rodwell CE, Mayer D, Guccione S. In vivo Bildgebung der HSP70 Expression in Korrelation mit der diffusionsgewichteten Bildgebung in drei verschiedenen Tumorzelllinien. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1252515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Hundt WH, O'Connell-Rodwell CE, Mayer D, Guccione S. In vivo Bildgebung des Effekt einer antiangiogenetischen Therapie in einem M21 Tumor Modell. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1252514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Desino KE, Pignatello R, Guccione S, Basile L, Ansar S, Michaelis ML, Ramsay RR, Audus KL. TCP-FA4: a derivative of tranylcypromine showing improved blood-brain permeability. Biochem Pharmacol 2009; 78:1412-7. [PMID: 19679106 DOI: 10.1016/j.bcp.2009.07.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2009] [Revised: 07/31/2009] [Accepted: 07/31/2009] [Indexed: 11/25/2022]
Abstract
A variety of approaches have been taken to improve the brain penetration of pharmaceutical agents. The amphipathic character of a compound can improve its interaction with the lipid bilayer within cell membranes, and as a result improve permeability. Fatty acid chains or lipoamino acids of various lengths were attached to tranylcypromine (TCP), in an attempt to improve the blood-brain barrier (BBB) permeability by increasing the lipophilicity as well as the amphiphatic character of the drug. TCP-FA4, one of the derivatives containing a four carbon alkyl acid chain, showed the greatest improvement in permeability. This molecule was slightly neuroprotective in a beta-amyloid-induced neurodegeneration assay and may also be capable of upregulating brain derived neurotrophic factor (BDNF), as indicated by cell culture assays using human umbilical vein endothelial cells. Since decreased levels of BDNF are observed in many CNS disorders, and direct injection of BDNF is not a viable option due to its poor permeability across the BBB, small molecules capable of regulating BDNF that also cross the BBB may be an interesting treatment option.
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Affiliation(s)
- Kelly E Desino
- The University of Kansas, Department of Pharmaceutical Chemistry, 2095 Constant Ave, Lawrence, KS 66047, USA.
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Hundt W, Yuh EL, Steinbach S, Bednarski MD, Guccione S. Genexpressionsprofil, histologische Analyse und Bildgebung bei Plattenepithelkarzinomtumoren im Vergleich zu Muskelgewebe nach Anwendung von kontinuierlichem Fokussiertem Ultraschall. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1221599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Copani A, Guccione S, Giurato L, Caraci F, Calafiore M, Sortino M, Nicoletti F. The Cell Cycle Molecules Behind Neurodegeneration in Alzheimers Disease: Perspectives for Drug Development. Curr Med Chem 2008; 15:2420-32. [DOI: 10.2174/092986708785909030] [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: 11/22/2022]
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Uccello-Barretta G, Balzano F, Bardoni S, Vanni L, Giurato L, Guccione S. Chiral discrimination processes by C9 carbamate derivatives of dihydroquinine: interaction mechanisms of diastereoisomeric 9-O-[(S)- or (R)-1-(1-naphthyl)ethylcarbamate]dihydroquinine and the two enantiomers of N-(3,5-dinitrobenzoyl)alanine methyl ester. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2008.04.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Hundt W, O'Connell-Rodwell CE, Mayer D, Guccione S, Contag CH, Reiser M, Bednarski MD. In vivo Bildgebung des Effekt einer antiangiogenetischen Therapie in einem M21 Tumor Modell. ROFO-FORTSCHR RONTG 2008. [DOI: 10.1055/s-2008-1073734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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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Hundt W, Yuh E, Bednarski MD, Reiser M, Guccione S. Genexpressionsprofil, histologische Analyse und Bildgebung im Plattenepithelkarzinomtumormodell nach Anwendung von Fokussiertem Ultraschall. ROFO-FORTSCHR RONTG 2008. [DOI: 10.1055/s-2008-1073671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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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Hundt W, Steinbach S, Reiser M, Guccione S. In Vivo Beurteilung der Luciferaseaktivität nach Anwendung von Fokussiertem Ultraschall. ROFO-FORTSCHR RONTG 2008. [DOI: 10.1055/s-2008-1073576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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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Abstract
The two forms of monoamine oxidase, monoamine oxidase A and monoamine oxidase B, have been associated with imidazoline-binding sites (type 2). Imidazoline ligands saturate the imidazoline-binding sites at nanomolar concentrations, but inhibit monoamine oxidase activity only at micromolar concentrations, suggesting two different binding sites [Ozaita A, Olmos G, Boronat MA, Lizcano JM, Unzeta M & García-Sevilla JA (1997) Br J Pharmacol121, 901-912]. When purified human monoamine oxidase A was used to examine the interaction with the active site, inhibition by guanabenz, 2-(2-benzofuranyl)-2-imidazoline and idazoxan was competitive with kynuramine as substrate, giving K(i) values of 3 microM, 26 microM and 125 microM, respectively. Titration of monoamine oxidase A with imidazoline ligands induced spectral changes that were used to measure the binding affinities for guanabenz (19.3 +/- 3.9 microM) and 2-(2-benzofuranyl)-2-imidazoline (49 +/- 8 microM). Only one type of binding site was detected. Agmatine, a putative endogenous ligand for some imidazoline sites, reduced monoamine oxidase A under anaerobic conditions, indicating that it binds close to the flavin in the active site. Flexible docking studies revealed multiple orientations within the large active site, including orientations close to the flavin that would allow oxidation of agmatine.
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Affiliation(s)
- Tadeusz Z E Jones
- Centre for Biomolecular Sciences, University of St Andrews, North Haugh, St Andrews, Fife, UK
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Vicentini C, Guccione S. Editorial [Hot Topic: Usefulness and Robustness of In Silico and Experimental Technology for Drug Discovery (Executive Editors: C.B. Vicentini and S. Guccione)]. Curr Pharm Des 2006. [DOI: 10.2174/138161206778743664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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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Perugini M, Giammarino A, Olivieri V, Guccione S, Lai OR, Amorena M. Polychlorinated biphenyls and organochlorine pesticide levels in tissues of Caretta caretta from the Adriatic Sea. Dis Aquat Organ 2006; 71:155-61. [PMID: 16956063 DOI: 10.3354/dao071155] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
We detected concentrations of polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCs) in the liver, muscle, and fat of 11 loggerhead sea turtles Caretta caretta from the central and southern Adriatic Sea. All samples contained PCBs at various concentrations, with Congener 138 (28%), 153 (27%), and 180 (32%) dominating the congener composition of the tissues. The dioxin-like congener (118, 13%) was detected in all tissues analyzed. The lower-chlorinated PCBs were not detected. The average of the total PCB concentrations, expressed in nanograms per gram wet weight, was 459.6 ng g(-1) in fat, 82.9 ng g(-1) in liver, and 5.8 ng g(-1) in muscle. Among 13 organochlorine pesticides for which analyses were conducted, 4 were detected: p,p'-DDE (57%); p,p'-DDD (16%); and p,p'-DDT and o,p'-DDT (27%). Spatial differences were found among OC concentrations in loggerheads from the central and southern Adriatic Sea. The only samples containing detectable concentrations of p,p'-DDT and o,p'-DDT were from the southern area.
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Affiliation(s)
- M Perugini
- Department of Food Sciences, Teramo University, Italy.
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Guccione S, Yang Y, Chia Y, Rubin D, Wang Y, Harsh G, Atlas S, Bednarski M. Identification of serum markers of glioblastoma multiforme patients using image-guided genomic and proteomic analysis. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.20008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
20008 Background: Biomarkers in serum has been demonstrated to play a critical role in caner diagnostics. Glioblastoma multiforme (GBM) is a primary brain tumor with poor prognosis and low survival rate, which often has significant heterogeneity in morphology and increased vascular permeability and vessel density. In this study we identified molecules related to angiogenesis and vasculature development for GBM using a combination of contrast enhanced MR imaging, genomic and proteomic analysis, and enzyme immunoassay (ELISA). Methods: GBM patient without any prior procedures were scanned on a GE 1.5T MRI scanner using standard T1- and T2-weighted pulse sequences and gadopentetate dimeglumine as contrast agent. Samples from regions with contrast agent accumulation (contrast-enhancing, CE) and no uptake (non-enhancing, NE) were collected for microarray, Mass spectroscopic analysis and immunochemical staining. Patient serum samples were collected for protein expression quantification using ELISA assay. Results: Tissue samples from the CE and NE regions of 13 patients reveal significantly distinct gene expression patterns. Mass spectroscopy using MALDI system will also be examined. Growth factors such as laminin receptor, IGFBP-2, IGFBP-3, IGFBP-5, aFGF were all up-regulated in the CE regions, and immunohistochemical staining confirmed their protein expression. The presence of proteins with MW < 30 kD in the serum were examined using ELISA. IGFBP-2 showed to have a higher mean value (86.1 ± 29.1 ng/ml) in GBM serum as compared to healthy individuals (55.7 ± 9.9 ng/ml). Other potential markers such as IGFBP-3 and aFGF do not exhibit significant difference. Conclusions: CE-MRI using the clinical MRI agent Gd(DTPA) can reveal imaging features associated with increased vascular permeability and vessel density, and areas of fluid accumulation and necrosis. We have observed that differences in spatial resolution in the tumor correlate to changes in gene expression profiles, resulting in potential molecules that have high gene and protein expression levels in tumor area with high vascular activity and in serum. These targets can be used for diagnostic and clinical monitoring of the patient before and after therapeutic intervention. No significant financial relationships to disclose.
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Affiliation(s)
| | - Y. Yang
- Stanford University, Stanford, CA
| | - Y. Chia
- Stanford University, Stanford, CA
| | - D. Rubin
- Stanford University, Stanford, CA
| | - Y. Wang
- Stanford University, Stanford, CA
| | - G. Harsh
- Stanford University, Stanford, CA
| | - S. Atlas
- Stanford University, Stanford, CA
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Yang Y, Chia Y, Rubin D, Harsh G, Atlas S, Bednarski M, Guccione S. Identification of integrin as potential molecular markers in human glioblastoma multiforme: Microarray analysis guided by contrast-enhanced MRI. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.10007] [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: 11/20/2022] Open
Abstract
10007 Background: Glioblastoma multiforme (GBM) is a primary brain tumor with poor prognosis and low survival rate. It is characterized as a highly infiltrative and vascular tumor, with morphologic heterogeneity including necrosis regions. We have used contrast enhanced (CE)-MRI to identify regions that differ in vascular permeability as delineated by the small molecule contrast agent Magnevist. Non-necrotic areas with and without contrast enhancement were sampled in the OR. The expression profiles for integrin family genes were investigated and validated using IHC. Genes encoding for integrin subunits with high expression levels in these regions of the tumor were identified and are presented here. Methods: Patients diagnosed with GBM, without any prior procedures were scanned on a GE 1.5T MRI scanner using standard T1- and T2-weighted pulse sequences and Gd(DTPA) as contrast agent. Samples from regions with vascular permeability to the contrast agent (contrast-enhancing, CE) and vascular regions that are not permeable to the contrast agent (non-enhancing, NE) were collected for gene expression profiling using the Affymatrix oligonucleotide microarray system. Genomic data was normalized at probe-level, and analyzed using a modified t-test, Significance Analysis of Microarray (SAM). Significant expression levels were identified. Immunohistochemical staining was used to validate protein expression of selected genes of interest. Results: Tissue samples from the CE and NE regions of 13 patients reveal significantly distinct gene expression patterns. In specific, genes in the integrin family such as integrin αIIb, αV and β3 show high expression levels in the CE region. Immunohistochemical staining confirmed correlation of protein expression patterns with the observed genomic profile. Conclusions: Combination of CE-MRI using the clinical contrast agent and microarray analysis can reveal spatial genomic profiles correlated with imaging features associated with increased vascular permeability, vessel density, and areas of fluid accumulation. The identified genes from the integrin family can be potential molecular targets, and can be used for molecular imaging and therapeutic purposes. No significant financial relationships to disclose.
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Affiliation(s)
- Y. Yang
- Stanford University, Stanford, CA
| | - Y. Chia
- Stanford University, Stanford, CA
| | - D. Rubin
- Stanford University, Stanford, CA
| | - G. Harsh
- Stanford University, Stanford, CA
| | - S. Atlas
- Stanford University, Stanford, CA
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Mares D, Romagnoli C, Andreotti E, Forlani G, Guccione S, Vicentini CB. Emerging antifungal azoles and effects on Magnaporthe grisea. ACTA ACUST UNITED AC 2006; 110:686-96. [PMID: 16769209 DOI: 10.1016/j.mycres.2006.03.006] [Citation(s) in RCA: 19] [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] [Received: 04/12/2005] [Revised: 02/25/2006] [Accepted: 03/19/2006] [Indexed: 11/15/2022]
Abstract
Derivatives of pyrazolo[1,5-a][1, 3, 5]triazine-2,4-dione,pyrazolo[1,5-c][1, 3, 5]thiadiazine-2-one, pyrazolo[3,4-d][1, 3]thiazine-4-one, and pyrazolo[3,4-d][1, 3]thiazine-4-thione were screened for antifungal activity against the causal agent of rice blast disease, Magnaporthe grisea. The compounds were tested at doses ranging from 10 to 200mugml(-1), using the commercial fungicide tricyclazole as reference compound. All triazine derivatives inhibited the growth and pigmentation of the mycelia less effectively than tricyclazole. The thiadiazine derivatives proved to be more effective than their triazine counterparts, but only 4-(butylimino)-7-methylpyrazolo[1,5-c][1,3,5]thiadiazine-2-one (2h) and 4-(cyclohexylimino)-7-methylpyrazolo[1,5-c][1,3,5]thiadiazine-2-one (2j) were more effective than tricyclazole. Pyrazolo[3,4-d][1,3]thiazine-4-one derivatives were active only at the highest doses, whereas members of the pyrazolo[3,4-d][1,3]thiazine-4-thione series inhibited fungal growth at the lowest concentrations used, at which tricyclazole had no effect. A dose-dependent mechanism might be responsible for this effect, with lipophilicity as the governing factor. Within a given set, the presence of a cyclohexyl or an n-butyl group generally increased antifungal activity, with respect to both growth inhibition and cell de-pigmentation of the mycelium, suggesting that a higher lipophilicity might improve transport inside the cells. SEM and TEM of M. grisea hyphae showed that treatment with the most active substance (2h) caused significant ultrastructural effects, particularly on the endomembrane system, suggesting a mechanism of action similar to that of most azole fungicides. Dissimilarities were also observed, with no alterations of the cell wall evident. In conclusion, several compounds showed greater inhibition than tricyclazole, and therefore provide useful new chemistry for control of M. grisea infections.
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Affiliation(s)
- D Mares
- Dipartimento delle Risorse Naturali e Culturali, Università degli Studi di Ferrara, V. Ercole l D'Este 32, Ferrara, Italy.
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Hildmann C, Wegener D, Riester D, Hempel R, Schober A, Merana J, Giurato L, Guccione S, Nielsen TK, Ficner R, Schwienhorst A. Substrate and inhibitor specificity of class 1 and class 2 histone deacetylases. J Biotechnol 2006; 124:258-70. [PMID: 16567013 DOI: 10.1016/j.jbiotec.2006.01.030] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2005] [Revised: 12/16/2005] [Accepted: 01/13/2006] [Indexed: 12/31/2022]
Abstract
Histone deacetylases (HDACs) are key enzymes in the transcriptional regulation of gene expression in eukaryotic cells. In recent years HDACs have attracted considerable attention as promising new targets in anticancer therapy. Currently, different histone deacetylase subtypes are divided into four groups denoted as classes 1-4. Here, we compare in more detail representatives of class 1 HDACs and FB188 HDAH as a close bacterial homologue of class 2 HDAC6, in regard of substrate and inhibitor specificity. Structure comparison is used to identify candidate regions responsible for observed specificity differences. Knowledge of these structural elements expedite studies on the biochemical role of different HDAC subtypes as well as the development of highly selective HDAC inhibitors as antitumor agents.
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Affiliation(s)
- Christian Hildmann
- Department of Molecular Genetics and Preparative Molecular Biology Institute for Microbiology und Genetics, Goettingen, Germany
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Pignatello R, Guccione S, Castelli F, Sarpietro MG, Giurato L, Lombardo M, Puglisi G, Toth I. Enhancement of drug affinity for cell membranes by conjugation with lipoamino acids II. Experimental and computational evidence using biomembrane models. Int J Pharm 2006; 310:53-63. [PMID: 16413709 DOI: 10.1016/j.ijpharm.2005.11.044] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2005] [Revised: 10/31/2005] [Accepted: 11/05/2005] [Indexed: 10/25/2022]
Abstract
Lipoamino acids (LAAs) are promoieties able to enhance the amphiphilicity of drugs, facilitating their interaction with cell membranes. Experimental and computational studies were carried out on two series of lipophilic amide conjugates between a model drug (tranylcypromine, TCP) and LAA or alkanoic acids containing a short, medium or long alkyl side chain (C-4 to C-16). The effects of these compounds were evaluated by monolayer surface tension analysis and differential scanning calorimetry using dimyristoylphosphatidylcholine monolayers and liposomes as biomembrane models. The experimental results were related to independent calculations to determine partition coefficient and blood-brain partitioning. The comparison of TCP-LAA conjugates with the related series of TCP alkanoyl amides confirmed that the ability to interact with the biomembrane models is not due to the mere increase of lipophilicity, but mainly to the amphipatic nature and the kind of LAA residue.
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Affiliation(s)
- Rosario Pignatello
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Catania, Viale A. Doria, 6, I-95125 Catania, Italy.
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Hundt W, O'Connell-Rodwell C, Mayer D, Guccione S, Contag CH, Bednarski M. In vivo Bildgebung der HSP70 Expression in Korrelation mit der diffusionsgewichteten Bildgebung bei 3 verschiedenen Tumorzelllinien. ROFO-FORTSCHR RONTG 2006. [DOI: 10.1055/s-2006-940820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Hundt W, O'Connell-Rodwell C, Guccione S, Bednarski M. Bildgebung der HSP70 Expression bei 3 verschiedenen Tumorzelllinien in Korrelation mit der Zellvitalität. ROFO-FORTSCHR RONTG 2006. [DOI: 10.1055/s-2006-940819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Uccello-Barretta G, Balzano F, Paolino D, Ciaccio R, Guccione S. Combined NMR-crystallographic and modelling investigation of the inclusion of molsidomine into α-, β- and γ-cyclodextrins. Bioorg Med Chem 2005; 13:6502-12. [PMID: 16169236 DOI: 10.1016/j.bmc.2005.07.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [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: 12/18/2004] [Revised: 07/04/2005] [Accepted: 07/04/2005] [Indexed: 11/28/2022]
Abstract
A NMR spectroscopic and crystallographic investigation supported by molecular modelling methods has been employed to describe the inclusion properties of molsidomine into the three underivatized alpha-, beta- and gamma-cyclodextrins, aimed to point out the factors affecting the complexation selectivity and stabilization. The NMR results were compared and validated by the analysis of crystallographic data as retrieved from the Cambridge Structural Database and molecular modelling studies.
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Pignatello R, Puleo A, Guccione S, Raciti G, Acquaviva R, Campisi A, Ventura CA, Puglisi G. Enhancement of drug affinity for cell membranes by conjugation with lipoamino acids. I. Synthesis and biological evaluation of lipophilic conjugates of tranylcypromine. Eur J Med Chem 2005; 40:1074-9. [PMID: 16126309 DOI: 10.1016/j.ejmech.2005.05.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [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: 05/16/2005] [Accepted: 05/23/2005] [Indexed: 10/25/2022]
Abstract
Conjugation with lipoamino acids (LAAs) increases the lipophilicity of drug molecules. Because of their amphipatic nature, they also provide the conjugated drugs a 'membrane-like character', capable to facilitate their interaction with and penetration through cell membranes and biological barriers. To study such a feature, our aim is to collect experimental and computational data using a novel series of lipophilic conjugates between a model drug (tranylcypromine (TCP)) and LAA residues containing a short, a medium or a long alkyl side chain (C-4 to C-16), to provide a wide range of lipophilicity. For comparison, a corresponding set of amides of TCP with alkanoic or fatty acids was prepared and characterized. Their in vitro monoamine oxidase inhibitory activity also tested.
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Affiliation(s)
- Rosario Pignatello
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Catania, Viale A. Doria, 6, I-95125 Catania, Italy.
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Geppi M, Guccione S, Mollica G, Pignatello R, Veracini CA. Molecular Properties of Ibuprofen and Its Solid Dispersions with Eudragit RL100 Studied by Solid-State Nuclear Magnetic Resonance. Pharm Res 2005; 22:1544-55. [PMID: 16132368 DOI: 10.1007/s11095-005-6249-5] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.4] [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: 03/24/2005] [Accepted: 05/31/2005] [Indexed: 10/25/2022]
Abstract
PURPOSE The aim of this study was to investigate, at a molecular level, the structural and dynamic properties of the acidic and sodium salt forms of ibuprofen and their solid dispersions with Eudragit RL100, obtained by two different preparation methods (physical mixtures and co-evaporates), which may affect the release properties of these drugs in their dispersed forms. METHODS (1)H and (13)C high-resolution solid-state nuclear magnetic resonance techniques, including single-pulse excitation magic-angle spinning, cross-polarization magic-angle spinning, and other selective 1D spectra, as well as more advanced 2D techniques Frequency Switched Lee-Goldburg HETeronuclear CORrelation (FSLG-HETCOR) and Magic Angle Spinning -J- Heteronuclear Multiple-Quantum Coherence (MAS-J-HMQC) and relaxation time measurements were used. RESULTS A full assignment of (13)C resonances and precise (1)H chemical shift values were achieved for the first time for the two forms of ibuprofen that showed very different inter-conformational dynamic behavior; drug-polymer interactions were observed and characterized in the co-evaporates of the two forms but were much stronger for the acidic form. CONCLUSIONS A combined analysis of several high-resolution solid-state nuclear magnetic resonance experiments allowed the investigation of the structural and dynamic properties of the pure drugs and of the solid dispersions with the polymer, as well as of the degree of mixing between drug and polymer and of the chemical nature of their interaction. Such information could be related to the in vitro drug release profiles observed for the tested co-evaporates.
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Affiliation(s)
- Marco Geppi
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Viale Risorgimento 35, 56126 Pisa, Italy.
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Muñoz-Muriedas J, Perspicace S, Bech N, Guccione S, Orozco M, Luque FJ. Hydrophobic Molecular Similarity from MST Fractional Contributions to the Octanol/water Partition Coefficient. J Comput Aided Mol Des 2005; 19:401-19. [PMID: 16231200 DOI: 10.1007/s10822-005-7928-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [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: 04/05/2005] [Accepted: 05/22/2005] [Indexed: 10/25/2022]
Abstract
The use of a recently proposed hydrophobic similarity index for the alignment of molecules and the prediction of their differences in biological activity is described. The hydrophobic similarity index exploits atomic contributions to the octanol/water transfer free energy, which are evaluated by means of the fractional partitioning scheme developed within the framework of the Miertus-Scrocco-Tomasi continuum model. Those contributions are used to define global and local measures of hydrophobic similarity. The suitability of this computational strategy is examined for two series of compounds (ACAT inhibitors and 5-HT3 receptor agonists), which are aligned to maximize the global hydrophobic similarity using a Monte Carlo-simulated protocol. Indeed, the concept of local hydrophobic similarity is used to explore structure-activity relationships in a series of COX-2 inhibitors. Inspection of the 3D distribution of hydrophobic/hydrophilic contributions in the aligned molecules is valuable to identify regions of very similar hydrophobicity, which can define pharmacophoric recognition patterns. Moreover, low similar regions permit to identify structural elements that modulate the differences in activity between molecules. Finally, the quantitative relationships found between the pharmacological activity and the hydrophobic similarity index points out that not only the global hydrophobicity, but its 3D distribution, is important to gain insight into the activity of molecules.
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Affiliation(s)
- Jordi Muñoz-Muriedas
- Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Av. Diagonal 643, 08028, Barcelona, Spain
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