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Puxeddu S, Scano A, Scorciapino MA, Delogu I, Vascellari S, Ennas G, Manzin A, Angius F. Physico-Chemical Investigation and Antimicrobial Efficacy of Ozonated Oils: The Case Study of Commercial Ozonated Olive and Sunflower Seed Refined Oils. Molecules 2024; 29:679. [PMID: 38338423 PMCID: PMC10856119 DOI: 10.3390/molecules29030679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/19/2024] [Accepted: 01/25/2024] [Indexed: 02/12/2024] Open
Abstract
Drug resistance represents one of the great plagues of our time worldwide. This largely limits the treatment of common infections and requires the development of new antibiotics or other alternative approaches. Noteworthy, the indiscriminate use of antibiotics is mostly responsible for the selection of mutations that confer drug resistance to microbes. In this regard, recently, ozone has been raising interest for its unique biological properties when dissolved in natural oils. Ozonated oils have been reported to act in a non-specific way on microorganisms hindering the acquisition of advantageous mutations that result in resistance. Here, we focused on the antimicrobial effect of two commercial olive (OOO) and sunflower seeds (OSO) oils. Nuclear magnetic resonance spectroscopy and thermal analysis showed the change in the chemical composition of the oils after ozonation treatment. Different ozonated oil concentrations were then used to evaluate their antimicrobial profile against Candida albicans, Enterococcus faecalis, Staphylococcus aureus, Klebsiella pneumoniae, Pseudomonas aeruginosa, and Escherichia coli by agar diffusion and broth dilution methods. Cytotoxicity was also evaluated in keratinocytes and epithelial cells. Overall, our results revealed that both OOO and OSO showed a potent microbicidal effect, especially against C. albicans (IC50 = OOO: 0.3 mg/mL and OSO: 0.2 mg/mL) and E. faecalis (IC50 = OOO: 0.4 mg/mL and OSO: 2.8 mg/mL) albeit exerting a certain effect also against S. aureus and E. coli. Moreover, both OOO and OSO do not yield any relevant cytotoxic effect at the active concentrations in both cell lines. This indicates that the ozonated oils studied are not toxic for mammalian cells despite exerting a potent antimicrobial effect on specific microorganisms. Therefore, OOO and OSO may be considered to integrate standard therapies in the treatment of common infections, likely overcoming drug resistance issues.
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Affiliation(s)
- Silvia Puxeddu
- Department of Biomedical Sciences, Section of Microbiology and Virology, University of Cagliari, 09042 Cagliari, Italy; (S.P.); (I.D.); (S.V.); (A.M.)
| | - Alessandra Scano
- Department of Chemical and Geological Sciences, University of Cagliari, 09042 Cagliari, Italy; (A.S.); (M.A.S.); (G.E.)
- Research Unit of the National Consortium of Materials Science and Technology (INSTM), University of Cagliari, 09042 Cagliari, Italy
| | - Mariano Andrea Scorciapino
- Department of Chemical and Geological Sciences, University of Cagliari, 09042 Cagliari, Italy; (A.S.); (M.A.S.); (G.E.)
| | - Ilenia Delogu
- Department of Biomedical Sciences, Section of Microbiology and Virology, University of Cagliari, 09042 Cagliari, Italy; (S.P.); (I.D.); (S.V.); (A.M.)
| | - Sarah Vascellari
- Department of Biomedical Sciences, Section of Microbiology and Virology, University of Cagliari, 09042 Cagliari, Italy; (S.P.); (I.D.); (S.V.); (A.M.)
| | - Guido Ennas
- Department of Chemical and Geological Sciences, University of Cagliari, 09042 Cagliari, Italy; (A.S.); (M.A.S.); (G.E.)
- Research Unit of the National Consortium of Materials Science and Technology (INSTM), University of Cagliari, 09042 Cagliari, Italy
| | - Aldo Manzin
- Department of Biomedical Sciences, Section of Microbiology and Virology, University of Cagliari, 09042 Cagliari, Italy; (S.P.); (I.D.); (S.V.); (A.M.)
| | - Fabrizio Angius
- Department of Biomedical Sciences, Section of Microbiology and Virology, University of Cagliari, 09042 Cagliari, Italy; (S.P.); (I.D.); (S.V.); (A.M.)
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Ibba R, Riu F, Delogu I, Lupinu I, Carboni G, Loddo R, Piras S, Carta A. Benzimidazole-2-Phenyl-Carboxamides as Dual-Target Inhibitors of BVDV Entry and Replication. Viruses 2022; 14:v14061300. [PMID: 35746771 PMCID: PMC9231222 DOI: 10.3390/v14061300] [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: 03/31/2022] [Revised: 05/28/2022] [Accepted: 06/08/2022] [Indexed: 11/26/2022] Open
Abstract
Bovine viral diarrhea virus (BVDV), also known as Pestivirus A, causes severe infection mostly in cattle, but also in pigs, sheep and goats, causing huge economical losses on agricultural farms every year. The infections are actually controlled by isolation of persistently infected animals and vaccination, but no antivirals are currently available to control the spread of BVDV on farms. BVDV binds the host cell using envelope protein E2, which has only recently been targeted in the research of a potent and efficient antiviral. In contrast, RdRp has been successfully inhibited by several classes of compounds in the last few decades. As a part of an enduring antiviral research agenda, we designed a new series of derivatives that emerged from an isosteric substitution of the main scaffold in previously reported anti-BVDV compounds. Here, the new compounds were characterized and tested, where several turned out to be potent and selectively active against BVDV. The mechanism of action was thoroughly studied using a time-of-drug-addition assay and the results were validated using docking simulations.
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Affiliation(s)
- Roberta Ibba
- Department of Medical, Surgical and Experimental Sciences, University of Sassari, 07100 Sassari, Italy; (R.I.); (F.R.); (I.L.); (A.C.)
| | - Federico Riu
- Department of Medical, Surgical and Experimental Sciences, University of Sassari, 07100 Sassari, Italy; (R.I.); (F.R.); (I.L.); (A.C.)
| | - Ilenia Delogu
- Department of Biomedical Sciences, Cittadella Universitaria Monserrato, University of Cagliari, 09042 Monserrato, Italy;
| | - Ilenia Lupinu
- Department of Medical, Surgical and Experimental Sciences, University of Sassari, 07100 Sassari, Italy; (R.I.); (F.R.); (I.L.); (A.C.)
| | - Gavino Carboni
- Department of Biomedical Sciences, University of Sassari, 07100 Sassari, Italy;
| | - Roberta Loddo
- Department of Biomedical Sciences, Cittadella Universitaria Monserrato, University of Cagliari, 09042 Monserrato, Italy;
- Correspondence: (R.L.); (S.P.)
| | - Sandra Piras
- Department of Medical, Surgical and Experimental Sciences, University of Sassari, 07100 Sassari, Italy; (R.I.); (F.R.); (I.L.); (A.C.)
- Correspondence: (R.L.); (S.P.)
| | - Antonio Carta
- Department of Medical, Surgical and Experimental Sciences, University of Sassari, 07100 Sassari, Italy; (R.I.); (F.R.); (I.L.); (A.C.)
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Ibba R, Piras S, Corona P, Riu F, Loddo R, Delogu I, Collu G, Sanna G, Caria P, Dettori T, Carta A. Synthesis, Antitumor and Antiviral In Vitro Activities of New Benzotriazole-Dicarboxamide Derivatives. Front Chem 2021; 9:660424. [PMID: 34017818 PMCID: PMC8129498 DOI: 10.3389/fchem.2021.660424] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 01/29/2021] [Accepted: 04/19/2021] [Indexed: 12/17/2022] Open
Abstract
Cancer and viral infections continue to threaten humankind causing death worldwide. Hence, the discovery of new anticancer and antiviral agents still represents a major scientific goal. Heterocycles designed to mimic the chemical structure of natural pyrimidines and purines have been designed over the years, exerting their activity acting as false substrates on several different targets. We reported a series of bis-benzotriazole-dicarboxamide derivatives which inhibit viral helicase of poliovirus, and hence we planned structure modifications to obtain different series of new dicarboxamides. Here, the synthesis and characterization of 56 new compounds: 31 bis-benzotriazole dicarboxamides and 25 mono-substituted acidic derivatives are reported. The synthesized compounds were tested for their antiviral and antitumor activity. Mostly, compounds 4a, 4c and 4d showed antiviral activity against tested Picornaviruses, Coxsackievirus B5 and Poliovirus-1. Likewise, four derivatives (3b, 3d, 4d, 9b) showed notable antiproliferative activity inhibiting cell growth in two distinct antitumor screenings. Compound 3b was selected as the antitumor lead compound for the wide range of activity and the potency proved. The lead compound was proved to induce apoptosis in SK-MES1 tumor cells, in a dose-dependent manner.
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Affiliation(s)
- Roberta Ibba
- Department of Chemistry and Pharmacy, University of Sassari, Sassari, Italy
| | - Sandra Piras
- Department of Chemistry and Pharmacy, University of Sassari, Sassari, Italy
| | - Paola Corona
- Department of Chemistry and Pharmacy, University of Sassari, Sassari, Italy
| | - Federico Riu
- Department of Chemistry and Pharmacy, University of Sassari, Sassari, Italy
| | - Roberta Loddo
- Department of Biomedical Sciences, Section of Microbiology and Virology, University of Cagliari, Cittadella Universitaria, Cagliari, Italy
| | - Ilenia Delogu
- Department of Biomedical Sciences, Section of Microbiology and Virology, University of Cagliari, Cittadella Universitaria, Cagliari, Italy
| | - Gabriella Collu
- Department of Biomedical Sciences, Section of Microbiology and Virology, University of Cagliari, Cittadella Universitaria, Cagliari, Italy
| | - Giuseppina Sanna
- Department of Biomedical Sciences, Section of Microbiology and Virology, University of Cagliari, Cittadella Universitaria, Cagliari, Italy
| | - Paola Caria
- Department of Biomedical Sciences, Section of Biochemistry, Biology and Genetics, University of Cagliari, Cittadella Universitaria, Cagliari, Italy
| | - Tinuccia Dettori
- Department of Biomedical Sciences, Section of Biochemistry, Biology and Genetics, University of Cagliari, Cittadella Universitaria, Cagliari, Italy
| | - Antonio Carta
- Department of Chemistry and Pharmacy, University of Sassari, Sassari, Italy
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Piras S, Corona P, Ibba R, Riu F, Murineddu G, Sanna G, Madeddu S, Delogu I, Loddo R, Carta A. Preliminary Anti-Coxsackie Activity of Novel 1-[4-(5,6-dimethyl(H)- 1H(2H)-benzotriazol-1(2)-yl)phenyl]-3-alkyl(aryl)ureas. Med Chem 2021; 16:677-688. [PMID: 31878859 DOI: 10.2174/1573406416666191226142744] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 04/18/2019] [Revised: 10/05/2019] [Accepted: 10/15/2019] [Indexed: 01/29/2023]
Abstract
BACKGROUND Coxsackievirus infections are associated with cases of aseptic meningitis, encephalitis, myocarditis, and some chronic disease. METHODS A series of benzo[d][1,2,3]triazol-1(2)-yl derivatives (here named benzotriazol-1(2)-yl) (4a-i, 5a-h, 6a-e, g, i, j and 7a-f, h-j) were designed, synthesized and in vitro evaluated for cytotoxicity and antiviral activity against two important human enteroviruses (HEVs) members of the Picornaviridae family [Coxsackievirus B 5 (CVB-5) and Poliovirus 1 (Sb-1)]. RESULTS Compounds 4c (CC50 >100 μM; EC50 = 9 μM), 5g (CC50 >100 μM; EC50 = 8 μM), and 6a (CC50 >100 μM; EC50 = 10 μM) were found active against CVB-5. With the aim of evaluating the selectivity of action of this class of compounds, a wide spectrum of RNA (positive- and negativesense), double-stranded (dsRNA) or DNA viruses were also assayed. For none of them, significant antiviral activity was determined. CONCLUSION These results point towards a selective activity against CVB-5, an important human pathogen that causes both acute and chronic diseases in infants, young children, and immunocompromised patients.
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Affiliation(s)
- Sandra Piras
- Department of Chemistry and Pharmacy, University of Sassari, Via Muroni, 23, 07100 Sassari, Italy
| | - Paola Corona
- Department of Chemistry and Pharmacy, University of Sassari, Via Muroni, 23, 07100 Sassari, Italy
| | - Roberta Ibba
- Department of Chemistry and Pharmacy, University of Sassari, Via Muroni, 23, 07100 Sassari, Italy
| | - Federico Riu
- Department of Chemistry and Pharmacy, University of Sassari, Via Muroni, 23, 07100 Sassari, Italy
| | - Gabriele Murineddu
- Department of Chemistry and Pharmacy, University of Sassari, Via Muroni, 23, 07100 Sassari, Italy
| | - Giuseppina Sanna
- Department of Biomedical Sciences, Section of Microbiology and Virology, University of Cagliari, Cittadella Universitaria, 09042, Monserrato, Italy
| | - Silvia Madeddu
- Department of Biomedical Sciences, Section of Microbiology and Virology, University of Cagliari, Cittadella Universitaria, 09042, Monserrato, Italy
| | - Ilenia Delogu
- Department of Biomedical Sciences, Section of Microbiology and Virology, University of Cagliari, Cittadella Universitaria, 09042, Monserrato, Italy
| | - Roberta Loddo
- Department of Biomedical Sciences, Section of Microbiology and Virology, University of Cagliari, Cittadella Universitaria, 09042, Monserrato, Italy
| | - Antonio Carta
- Department of Chemistry and Pharmacy, University of Sassari, Via Muroni, 23, 07100 Sassari, Italy
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Corona P, Piras S, Ibba R, Riu F, Murineddu G, Sanna G, Madeddu S, Delogu I, Loddo R, Carta A. Antiviral Activity of Benzotriazole Based Derivatives. TOMCJ 2020. [DOI: 10.2174/1874104502014010083] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
For the last thirty years, the benzotriazole scaffold has been the object of our group interest and we have already presented some results on the antiviral activity of our compounds.
Objective:
In this article, we conclude the exploration of N-(4-(R-2H-benzo[d][1,2,3]triazol-2-yl)phenyl)-4-R’-benzamides and 1-(4-(R-2H-benzo[d][1,2,3]triazol-2-yl)phenyl)-3-R’-ureas by synthesizing further modified derivatives, in order to have more elements for SARs evaluation.
Methods:
Here, we reported the synthesis and the antiviral screening results of 38 newly synthesized benzotriazole derivatives against a panel of DNA and RNA viruses. We also analyse SARs in comparing these compounds with previously published benzotriazole analogues, taking stock of the situation.
Results:
Among the newly presented derivatives, compounds 17 and 18 were the most active with EC50 6.9 and 5.5 µM, respectively against Coxsackievirus B5 (CV-B5) and 20.5 and 17.5 µM against Poliovirus (Sb-1).
Conclusion:
we can conclude that N-(4-(2H-benzo[d] [1 - 3] triazol-2-yl)phenyl-R-amide is a good chemical scaffold for the development of new antiviral molecules.
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Ibba R, Piras S, Delogu I, Loddo R, Carta A. Anti-BVDV Activity Evaluation of Naphthoimidazole Derivatives Compared with Parental Imidazoquinoline Compounds. TOMCJ 2020. [DOI: 10.2174/1874104502014010065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Pestivirus genus includes animal pathogens which are involved in economic impact for the livestock industry. Among others, Bovine Viral Diarrhoea Virus (BVDV) establish a persistent infection in cattle causing a long list of symptoms and a high mortality rate. In the last decades, we synthesised and reported a certain number of anti-BVDV compounds.
Methods:
In them, imidazoquinoline derivatives turned out as the most active. Their mechanism of actions has been deeply investigated, BVDV RNA-dependent RNA polymerase (RpRd) resulted as target and the way of binding was predicted in silico through three main H-bond interaction with the target.
The prediction could be confirmed by target or ligand mutation. The first approach has already been performed and published confirming the in silico prediction.
Results:
Here, we present how the ligand chemical modification affects the anti-BVDV activity. The designed compounds were synthesised and tested against BVDV as in silico assay negative control.
Conclusion:
The antiviral results confirmed the predicted mechanism of action, as the newly synthesised compounds resulted not active in the in vitro BVDV infection inhibition.
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Desideri N, Fioravanti R, Proietti Monaco L, Atzori EM, Carta A, Delogu I, Collu G, Loddo R. Design, Synthesis, Antiviral Evaluation, and SAR Studies of New 1-(Phenylsulfonyl)-1 H-Pyrazol-4-yl-Methylaniline Derivatives. Front Chem 2019; 7:214. [PMID: 31024899 PMCID: PMC6465675 DOI: 10.3389/fchem.2019.00214] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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: 01/10/2019] [Accepted: 03/19/2019] [Indexed: 11/13/2022] Open
Abstract
A series of N-((3-phenyl-1-(phenylsulfonyl)-1H-pyrazol-4-yl)methyl)anilines 7a-p and 8a-l, structurally related to previously synthesized and tested (N-(1,3-diphenyl-1H-pyrazol-4-yl)methyl)anilines (1a-v), were designed and synthesized. The new derivatives were evaluated in cell-based assays for their cytotoxicity and antiviral activity against a large panel of RNA and DNA viruses of public health significance. Generally, the tested compounds did not display cytotoxicity toward the cell lines used. The majority of derivatives 7a-p were able to interfered with YFV and RSV replication in the micromolar range showing a marked improvement in potency and selectivity with respect to the reference inhibitors 6-azauridine and ribavirin, respectively. The introduction of a p-methoxy substituent on the phenylsulfonyl group (compounds 8a-l) completely abolished the anti-RSV activity and reduced or eliminated the potency against YFV. On the contrary, several p-methoxy analogs were able to interfere with BVDV replication with a comparable (8b, 8c, 8g, and 8k) or better (8a and 8f) potency than the reference inhibitor, ribavirin. Compound 7e, selected for time of addition experiments on BHK-21 cell cultures infected with YFV, achieved the highest reduction of virus titer when added 2 h post infection and maintained up to 4 h post infection.
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Affiliation(s)
- Nicoletta Desideri
- Dipartimento di Chimica e Tecnologie del Farmaco, Università "La Sapienza", Rome, Italy
| | - Rossella Fioravanti
- Dipartimento di Chimica e Tecnologie del Farmaco, Università "La Sapienza", Rome, Italy
| | - Luca Proietti Monaco
- Dipartimento di Chimica e Tecnologie del Farmaco, Università "La Sapienza", Rome, Italy
| | - Elena Maria Atzori
- Dipartimento di Chimica e Tecnologie del Farmaco, Università "La Sapienza", Rome, Italy
| | - Antonio Carta
- Dipartimento di Chimica e Farmacia, Università di Sassari, Sassari, Italy
| | - Ilenia Delogu
- Dipartimento di Scienze Biomediche, Università di Cagliari, Cagliari, Italy
| | - Gabriella Collu
- Dipartimento di Scienze Biomediche, Università di Cagliari, Cagliari, Italy
| | - Roberta Loddo
- Dipartimento di Scienze Biomediche, Università di Cagliari, Cagliari, Italy
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Fioravanti R, Desideri N, Carta A, Atzori EM, Delogu I, Collu G, Loddo R. Inhibitors of Yellow Fever Virus replication based on 1,3,5-triphenyl-4,5-dihydropyrazole scaffold: Design, synthesis and antiviral evaluation. Eur J Med Chem 2017; 141:15-25. [DOI: 10.1016/j.ejmech.2017.09.060] [Citation(s) in RCA: 5] [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] [Received: 08/07/2017] [Revised: 09/25/2017] [Accepted: 09/27/2017] [Indexed: 12/21/2022]
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Cichero E, Tonelli M, Novelli F, Tasso B, Delogu I, Loddo R, Bruno O, Fossa P. Benzimidazole-based derivatives as privileged scaffold developed for the treatment of the RSV infection: a computational study exploring the potency and cytotoxicity profiles. J Enzyme Inhib Med Chem 2017; 32:375-402. [PMID: 28276287 PMCID: PMC6021036 DOI: 10.1080/14756366.2016.1256881] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [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] [Indexed: 11/08/2022] Open
Abstract
Respiratory syncytial virus (RSV) has been identified as a main cause of hospitalisation in infants and children. To date, the current therapeutic arsenal is limited to ribavirin and palivizumab with variable efficacy. In this work, starting from a number of in-house series of previously described anti-RSV agents based on the benzimidazole scaffold, with the aim at gaining a better understanding of the related chemical features involved in potency and safety profiles, we applied a computational study including two focussed comparative molecular fields analysis (CoMFA) and comparative molecular similarity indices analysis (CoMSIA). The results allowed us to derive useful suggestions for the design of derivatives and also to set up statistical models predicting the potency and selectivity index (SI = CC50/EC50) of any new analogue prior to synthesis. Accordingly, here, we discuss preliminary results obtained through the applied exhaustive QSAR analyses, leading to design and synthesise more effective anti-RSV agents.
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Affiliation(s)
- Elena Cichero
- a Department of Pharmacy , University of Genoa , Genoa , Italy
| | - Michele Tonelli
- a Department of Pharmacy , University of Genoa , Genoa , Italy
| | | | - Bruno Tasso
- a Department of Pharmacy , University of Genoa , Genoa , Italy
| | - Ilenia Delogu
- b Department of Biomedical Sciences , University of Cagliari, Cittadella Universitaria , Monserrato , CA , Italy
| | - Roberta Loddo
- b Department of Biomedical Sciences , University of Cagliari, Cittadella Universitaria , Monserrato , CA , Italy
| | - Olga Bruno
- a Department of Pharmacy , University of Genoa , Genoa , Italy
| | - Paola Fossa
- a Department of Pharmacy , University of Genoa , Genoa , Italy
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Ibrahim MM, Mazzei M, Delogu I, Szabó R, Sanna G, Loddo R. Activity of bis(7-hydroxycoumarin) Mannich bases against bovine viral diarrhoea virus. Antiviral Res 2016; 134:153-160. [DOI: 10.1016/j.antiviral.2016.07.022] [Citation(s) in RCA: 2] [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] [Received: 05/13/2016] [Revised: 06/29/2016] [Accepted: 07/27/2016] [Indexed: 02/03/2023]
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Carta A, Briguglio I, Piras S, Corona P, Ibba R, Laurini E, Fermeglia M, Pricl S, Desideri N, Atzori E, La Colla P, Collu G, Delogu I, Loddo R. A combined in silico / in vitro approach unveils common molecular requirements for efficient BVDV RdRp binding of linear aromatic N-polycyclic systems. Eur J Med Chem 2016; 117:321-34. [DOI: 10.1016/j.ejmech.2016.03.080] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 03/16/2016] [Accepted: 03/25/2016] [Indexed: 12/14/2022]
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12
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Loddo R, Novelli F, Sparatore A, Tasso B, Tonelli M, Boido V, Sparatore F, Collu G, Delogu I, Giliberti G, La Colla P. Antiviral activity of benzotriazole derivatives. 5-[4-(Benzotriazol-2-yl)phenoxy]-2,2-dimethylpentanoic acids potently and selectively inhibit Coxsackie Virus B5. Bioorg Med Chem 2015; 23:7024-34. [PMID: 26443549 DOI: 10.1016/j.bmc.2015.09.035] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 09/17/2015] [Accepted: 09/20/2015] [Indexed: 12/21/2022]
Abstract
A library of 64 benzotriazole derivatives (17 of which were [4-(benzotriazol-2-yl)phenoxy]alkanoic acids) were screened for antiviral activity against a panel of twelve DNA and RNA viruses. Twenty-six compounds (12 of which were [4-(benzotriazol-2-yl)phenoxy]alkanoic acids) displayed activity against one or more viruses. CVB-5, RSV, BVDV, Sb-1 and YFV were, in decreasing order, the more frequently and effectively affected viruses; DENV-2, WNV, HIV-1 and Reo-1 were only occasionally and modestly affected, while the remaining viruses were not affected by any of the tested compounds. Worth of note were compounds 33 and 35; the former for the activity against Sb-1 (EC50=7 μM) and the latter for the large spectrum of activity including six viruses with a mean EC50=12 μM. Even more interesting were the alkanoic acids 45-48 and 50-57 for their activity against RSV and/or CVB-5. In particular, compound 56 displayed a potent and selective activity against CVB-5 with EC50=0.15 μM and SI=100, thus representing a valuable hit compound for the development of antiviral agents for the treatment of human pathologies related to this virus.
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Affiliation(s)
- Roberta Loddo
- Dipartimento di Scienze Biomediche, Università degli Studi di Cagliari, Cittadella Universitaria, 09042 Monserrato (CA), Italy.
| | - Federica Novelli
- Dipartimento di Farmacia, Università degli Studi di Genova, Viale Benedetto XV, 3, 16132 Genova, Italy
| | - Anna Sparatore
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via Mangiagalli 25, 20133 Milano, Italy
| | - Bruno Tasso
- Dipartimento di Farmacia, Università degli Studi di Genova, Viale Benedetto XV, 3, 16132 Genova, Italy
| | - Michele Tonelli
- Dipartimento di Farmacia, Università degli Studi di Genova, Viale Benedetto XV, 3, 16132 Genova, Italy.
| | - Vito Boido
- Dipartimento di Farmacia, Università degli Studi di Genova, Viale Benedetto XV, 3, 16132 Genova, Italy
| | - Fabio Sparatore
- Dipartimento di Farmacia, Università degli Studi di Genova, Viale Benedetto XV, 3, 16132 Genova, Italy
| | - Gabriella Collu
- Dipartimento di Scienze Biomediche, Università degli Studi di Cagliari, Cittadella Universitaria, 09042 Monserrato (CA), Italy
| | - Ilenia Delogu
- Dipartimento di Scienze Biomediche, Università degli Studi di Cagliari, Cittadella Universitaria, 09042 Monserrato (CA), Italy
| | - Gabriele Giliberti
- Dipartimento di Scienze Biomediche, Università degli Studi di Cagliari, Cittadella Universitaria, 09042 Monserrato (CA), Italy
| | - Paolo La Colla
- Dipartimento di Scienze Biomediche, Università degli Studi di Cagliari, Cittadella Universitaria, 09042 Monserrato (CA), Italy
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13
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Caneva C, Alfei S, De Maria M, Ibba C, Delogu I, Spallarossa A, Loddo R. Synthesis and biological evaluation of (acyl)hydrazones and thiosemicarbazones obtained via in situ condensation of iminium salts with nitrogen-containing nucleophiles. Mol Divers 2015; 19:669-84. [PMID: 26077842 DOI: 10.1007/s11030-015-9597-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [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: 11/13/2014] [Accepted: 04/02/2015] [Indexed: 11/25/2022]
Abstract
An unprecedented, highly convergent, high-yielding, one-pot synthesis of (acyl)hydrazones and thiosemicarbazones was carried out by the in situ condensation of isolable iminium chlorides of imidazolidin-2-(thio)one, tetrahydropyrimidin-2-thione and indole derivatives with nitrogen nucleophiles in the presence of a base. The developed reaction procedure is largely advantageous. It is highly parallelizable, no intermediates need to be isolated and minimal sample handling is required during the purification steps. Some relevant reaction parameters including reaction temperature and p[Formula: see text] of the base are discussed. NMR analysis was carried out to assess the stereochemistry of the obtained compounds. The stereochemical outcome of the reaction was found to be affected by the nature of the nitrogen-containing nucleophile being the majority of the derivatives isolated as single geometric isomers. The cytotoxicity and antiviral activities of the prepared compounds have been preliminary assessed. In cell-based screenings some of the derivatives proved to be cytotoxic at low micromolar concentrations and interesting anti-Reo-1 properties have been detected.
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Affiliation(s)
- Chiara Caneva
- Dipartimento di Farmacia, Università degli Studi di Genova, Viale Benedetto XV 3, 16132, Genova, Italy
| | - Silvana Alfei
- Dipartimento di Farmacia, Università degli Studi di Genova, Viale Benedetto XV 3, 16132, Genova, Italy
| | - Monica De Maria
- Department of Chemistry and Pharmacy, Emil Fischer Center, Friedrich-Alexander University, Schuhstraße 19, 91052, Erlangen, Germany
| | - Cristina Ibba
- Dipartimento di Scienze Biomediche, Sezione di Microbiologia e Virologia, Università degli Studi di Cagliari, Cittadella Universitaria di Monserrato, s.p.8, Km 0.700, 09042, Monserrato, Cagliari, Italy
| | - Ilenia Delogu
- Dipartimento di Scienze Biomediche, Sezione di Microbiologia e Virologia, Università degli Studi di Cagliari, Cittadella Universitaria di Monserrato, s.p.8, Km 0.700, 09042, Monserrato, Cagliari, Italy
| | - Andrea Spallarossa
- Dipartimento di Farmacia, Università degli Studi di Genova, Viale Benedetto XV 3, 16132, Genova, Italy.
| | - Roberta Loddo
- Dipartimento di Scienze Biomediche, Sezione di Microbiologia e Virologia, Università degli Studi di Cagliari, Cittadella Universitaria di Monserrato, s.p.8, Km 0.700, 09042, Monserrato, Cagliari, Italy.
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14
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Affiliation(s)
- Ilenia Delogu
- Unité des Virus Emergents, UMR190 (Aix-Marseille 2 University-IRD-EHESP), Marseille, France
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15
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Delogu I, Pastorino B, Baronti C, Nougairède A, Bonnet E, de Lamballerie X. In vitro antiviral activity of arbidol against Chikungunya virus and characteristics of a selected resistant mutant. Antiviral Res 2011; 90:99-107. [PMID: 21440006 DOI: 10.1016/j.antiviral.2011.03.182] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2011] [Revised: 03/14/2011] [Accepted: 03/17/2011] [Indexed: 11/15/2022]
Abstract
Arbidol (ARB) is an antiviral drug originally licensed in Russia for use against influenza and other respiratory viral infections. Although a broad-spectrum antiviral activity has been reported for this drug, there is until now no data regarding its effects against alphavirus infection. Here, the in vitro antiviral effect of ARB on Chikungunya virus (CHIKV) replication was investigated and this compound was found to present potent inhibitory activity against the virus propagated onto immortalized Vero cells or primary human fibroblasts (MRC-5 lung cells) (IC(50)<10μg/ml). A CHIKV resistant mutant was then selected and adapted to growth in the presence of 30μg/ml ARB in MRC5 cells; its complete sequence analysis revealed a single amino acid substitution (G407R) localized in the E2 envelope protein. To confirm the G407R role in the molecular mechanism of ARB resistance, a CHIKV infectious clone harboring the same substitution was engineered, tested, and was found to display a similar level of resistance. Finally, our results demonstrated the effective in vitro antiviral activity of ARB against CHIKV and gave some tracks to understand the molecular basis of ARB activity.
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Affiliation(s)
- Ilenia Delogu
- Unité des Virus Emergents, UMR190 Emergence des pathologies virales Université de la Méditerranée, Institut de Recherche pour le Développement, EHSP French School of Public Health, Faculté de Médecine, Marseille, France
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16
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Ninove L, Nougairede A, Gazin C, Thirion L, Delogu I, Zandotti C, Charrel RN, De Lamballerie X. RNA and DNA bacteriophages as molecular diagnosis controls in clinical virology: a comprehensive study of more than 45,000 routine PCR tests. PLoS One 2011; 6:e16142. [PMID: 21347398 PMCID: PMC3036576 DOI: 10.1371/journal.pone.0016142] [Citation(s) in RCA: 108] [Impact Index Per Article: 8.3] [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: 09/15/2010] [Accepted: 12/06/2010] [Indexed: 01/09/2023] Open
Abstract
Real-time PCR techniques are now commonly used for the detection of viral genomes in various human specimens and require for validation both external and internal controls (ECs and ICs). In particular, ICs added to clinical samples are necessary to monitor the extraction, reverse transcription, and amplification steps in order to detect false-negative results resulting from PCR-inhibition or errors in the technical procedure. Here, we performed a large scale evaluation of the use of bacteriophages as ICs in routine molecular diagnosis. This allowed to propose simple standardized procedures (i) to design specific ECs for both DNA and RNA viruses and (ii) to use T4 (DNA) or MS2 (RNA) phages as ICs in routine diagnosis. Various technical formats for using phages as ICs were optimised and validated. Subsequently, T4 and MS2 ICs were evaluated in routine real-time PCR or RT-PCR virological diagnostic tests, using a series of 8,950 clinical samples (representing 36 distinct specimen types) sent to our laboratory for the detection of a variety of DNA and RNA viruses. The frequency of inefficient detection of ICs was analyzed according to the nature of the sample. Inhibitors of enzymatic reactions were detected at high frequency in specific sample types such as heparinized blood and bone marrow (>70%), broncho-alveolar liquid (41%) and stools (36%). The use of T4 and MS2 phages as ICs proved to be cost-effective, flexible and adaptable to various technical procedures of real-time PCR detection in virology. It represents a valuable strategy for enhancing the quality of routine molecular diagnosis in laboratories that use in-house designed diagnostic systems, which can conveniently be associated to the use of specific synthetic ECs. The high rate of inhibitors observed in a variety of specimen types should stimulate the elaboration of improved technical protocols for the extraction and amplification of nucleic acids.
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Affiliation(s)
- Laetitia Ninove
- UMR190, Université de la Méditerranée and Institut de Recherche pour le Développement, Marseille, France.
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17
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Gould EA, Coutard B, Malet H, Morin B, Jamal S, Weaver S, Gorbalenya A, Moureau G, Baronti C, Delogu I, Forrester N, Khasnatinov M, Gritsun T, de Lamballerie X, Canard B. Understanding the alphaviruses: recent research on important emerging pathogens and progress towards their control. Antiviral Res 2009; 87:111-24. [PMID: 19616028 PMCID: PMC7114216 DOI: 10.1016/j.antiviral.2009.07.007] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2009] [Revised: 07/07/2009] [Accepted: 07/11/2009] [Indexed: 11/28/2022]
Abstract
The alphaviruses were amongst the first arboviruses to be isolated, characterized and assigned a taxonomic status. They are globally very widespread, infecting a large variety of terrestrial animals, insects and even fish, and circulate both in the sylvatic and urban/peri-urban environment, causing considerable human morbidity and mortality. Nevertheless, despite their obvious importance as pathogens, there are currently no effective antiviral drugs with which to treat humans or animals infected by any of these viruses. The EU-supported project-VIZIER (Comparative Structural Genomics of Viral Enzymes Involved in Replication, FP6 PROJECT: 2004-511960) was instigated with an ultimate view of contributing to the development of antiviral therapies for RNA viruses, including the alphaviruses [Coutard, B., Gorbalenya, A.E., Snijder, E.J., Leontovich, A.M., Poupon, A., De Lamballerie, X., Charrel, R., Gould, E.A., Gunther, S., Norder, H., Klempa, B., Bourhy, H., Rohayemj, J., L'hermite, E., Nordlund, P., Stuart, D.I., Owens, R.J., Grimes, J.M., Tuckerm, P.A., Bolognesi, M., Mattevi, A., Coll, M., Jones, T.A., Aqvist, J., Unger, T., Hilgenfeld, R., Bricogne, G., Neyts, J., La Colla, P., Puerstinger, G., Gonzalez, J.P., Leroy, E., Cambillau, C., Romette, J.L., Canard, B., 2008. The VIZIER project: preparedness against pathogenic RNA viruses. Antiviral Res. 78, 37-46]. This review highlights some of the major features of alphaviruses that have been investigated during recent years. After describing their classification, epidemiology and evolutionary history and the expanding geographic distribution of Chikungunya virus, we review progress in understanding the structure and function of alphavirus replicative enzymes achieved under the VIZIER programme and the development of new disease control strategies.
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Affiliation(s)
- E A Gould
- Institut de Recherche pour le Développement UMR190/Unité des Virus Emergents, Université de la Méditerranée, Marseille, France.
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