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Amorim Madeira PJ, Sitoe ARF, Gonçalves D, Rodrigues T, Guedes RC, Lopes F, Moreira R, Bronze MR. Antiplasmodial drugs in the gas phase: a CID and DFT study of quinolon-4(1H)-imine derivatives. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2014; 25:1650-1661. [PMID: 25001380 DOI: 10.1007/s13361-014-0940-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 05/26/2014] [Accepted: 05/26/2014] [Indexed: 06/03/2023]
Abstract
The gas-phase behavior of 12 quinolon-4(1H)-imine derivatives with antiplasmodial activity was investigated using electrospray ionization tandem mass spectrometry together with collision induced dissociation and density functional theory (DFT) calculations. The most probable protonation site was predicted by calculating the proton affinity (PA) values for each possible protonation site and it was found to be the imine nitrogen for all compounds under study. Fragmentation pathways of the protonated molecules were proposed and the assignment of product ion structures was performed taking into account theoretical calculations. The nature of the quinoline substituent was found to influence the gas-phase behavior of the compounds under study. The data acquired allowed to bracket the proton affinity of the quinolin-4-imine scaffold, which can be a useful starting point to choose appropriate references for determining PA values of this scaffold.
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Affiliation(s)
- Paulo J Amorim Madeira
- Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, 1649-003, Lisbon, Portugal,
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García-Aranda MI, González-López S, Santiveri CM, Gagey-Eilstein N, Reille-Seroussi M, Martín-Martínez M, Inguimbert N, Vidal M, García-López MT, Jiménez MA, González-Muñiz R, Pérez de Vega MJ. Helical peptides from VEGF and Vammin hotspots for modulating the VEGF–VEGFR interaction. Org Biomol Chem 2013; 11:1896-905. [DOI: 10.1039/c3ob27312a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Vale-Costa S, Vale N, Matos J, Tomás A, Moreira R, Gomes P, Gomes MS. Peptidomimetic and organometallic derivatives of primaquine active against Leishmania infantum. Antimicrob Agents Chemother 2012; 56:5774-81. [PMID: 22926569 PMCID: PMC3486614 DOI: 10.1128/aac.00873-12] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Accepted: 08/19/2012] [Indexed: 11/20/2022] Open
Abstract
The current treatment of visceral leishmaniasis is made difficult by the low efficacy, elevated costs, low bioavailability, and high toxicity of many of the available drugs. Primaquine, an antimalarial 8-aminoquinoline, displays activity against Leishmania spp., and several of its derivatives have been developed as potential antileishmanial drugs. However, primaquine exhibits low oral bioavailability due to oxidative deamination of its aliphatic chain. We previously developed peptidomimetic and organometallic derivatives of primaquine, with higher resistance to proteolytic degradation and oxidative deamination, which presented significant activity against primaquine-sensitive pathogens such as Plasmodium or Pneumocystis. In light of these relevant findings, we decided to evaluate these compounds against both the promastigote and intramacrophagic amastigote forms of Leishmania infantum, the agent of Mediterranean visceral leishmaniasis. We found that several of these compounds had significant activity against L. infantum. One of the peptidomimetic (3c) and one of the organometallic (7a) derivatives of primaquine were active against the clinically relevant intramacrophagic amastigote form of the parasite, causing >96% reductions in the number of amastigotes per 100 macrophages at 60 and 40 μM, respectively, while being less cytotoxic for host cells than the reference drugs sitamaquine and miltefosine. Hence, compounds 3c and 7a represent new entries toward the development of new antileishmanial leads.
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Affiliation(s)
- Sílvia Vale-Costa
- Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
- Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | - Nuno Vale
- Centro de Investigação em Química, Universidade do Porto, Porto, Portugal
- Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
| | - Joana Matos
- Centro de Investigação em Química, Universidade do Porto, Porto, Portugal
- Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
| | - Ana Tomás
- Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
- Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | - Rui Moreira
- iMed.UL, CECF, Faculdade de Farmácia, Universidade de Lisboa, Lisbon, Portugal
| | - Paula Gomes
- Centro de Investigação em Química, Universidade do Porto, Porto, Portugal
- Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
| | - Maria Salomé Gomes
- Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
- Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
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Botelho MC, Soares R, Vale N, Ribeiro R, Camilo V, Almeida R, Medeiros R, Gomes P, Machado JC, Correia da Costa JM. Schistosoma haematobium: identification of new estrogenic molecules with estradiol antagonistic activity and ability to inactivate estrogen receptor in mammalian cells. Exp Parasitol 2010; 126:526-35. [PMID: 20547157 DOI: 10.1016/j.exppara.2010.06.012] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2010] [Revised: 05/27/2010] [Accepted: 06/01/2010] [Indexed: 01/13/2023]
Abstract
We have previously identified the expression of an estradiol (E2)-related molecule by Schistosoma haematobium total antigen (Sh). We now show that this molecule has an antagonistic effect of estradiol in vitro. Our results are consistent with the existence of an estrogenic molecule that antagonizes the activity of estradiol. We found evidence for this molecule as we identified and characterized by mass spectrometry new estrogenic molecules previously unknown, present in schistosome worm extracts and sera of Schistosoma-infected individuals. We also show that Sh is able to interact in vitro with estrogen receptor (ER), explaining how host endocrine system can favor the establishment of schistosomes. These findings highlight the exploitation of the host endocrine system by schistosomes and represent an additional regulatory component of schistosome development that defines a novel paradigm enabling host-parasite interactions. The identification of these molecules opens new ways for the development of alternative drugs to treat schistosomiasis.
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Vale N, Prudêncio M, Marques CA, Collins MS, Gut J, Nogueira F, Matos J, Rosenthal PJ, Cushion MT, do Rosário VE, Mota MM, Moreira R, Gomes P. Imidazoquines as antimalarial and antipneumocystis agents. J Med Chem 2009; 52:7800-7. [PMID: 19799426 PMCID: PMC2788672 DOI: 10.1021/jm900738c] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Peptidomimetic imidazolidin-4-one derivatives of primaquine (imidazoquines) recently displayed in vitro activity against blood schizonts of a chloroquine-resistant strain of Plasmodium falciparum. Preliminary studies with a subset of such imidazoquines showed them to both block transmission of P. berghei malaria from mouse to mosquito and be highly stable toward hydrolysis at physiological conditions. This prompted us to have deeper insight into the activity of imidazoquines against both Plasmodia and Pneumocystis carinii, on which primaquine is also active. Full assessment of the in vivo transmission-blocking activity of imidazoquines, in vitro tissue-schizontocidal activity on P. berghei-infected hepatocytes, and in vitro anti-P. carinii activity is now reported. All compounds were active in these biological assays, with generally lower activity than the parent drug. However, imidazoquines' stability against both oxidative deamination and proteolytic degradation suggest that they will probably have higher oral bioavailability and lower hematotoxicity than primaquine, which might translate into higher therapeutic indexes.
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Affiliation(s)
- Nuno Vale
- CIQUP – Centro de Investigação em Química da Universidade do Porto, Departamento de Química, Faculdade de Ciências, Universidade do Porto, P-4169-007 Porto, Portugal
| | - Miguel Prudêncio
- Unidade de Malária, Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, P-1649-028 Lisboa, Portugal
| | - Catarina A. Marques
- Unidade de Malária, Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, P-1649-028 Lisboa, Portugal
| | - Margaret S. Collins
- Research Services, Veterans Affairs Medical Center, Cincinnati, OH 45220, USA
- Division of Infectious Diseases, Department of Internal Medicine, University of Cincinnati, OH 45267-0560, USA
| | - Jiri Gut
- Department of Medicine, San Francisco General Hospital, University of California, CA 94143-0811, USA
| | - Fátima Nogueira
- Centro de Malária e Outras Doenças Tropicais, IHMT - Universidade Nova de Lisboa, P-1349-008 Lisboa, Portugal
| | - Joana Matos
- CIQUP – Centro de Investigação em Química da Universidade do Porto, Departamento de Química, Faculdade de Ciências, Universidade do Porto, P-4169-007 Porto, Portugal
| | - Philip J. Rosenthal
- Department of Medicine, San Francisco General Hospital, University of California, CA 94143-0811, USA
| | - Melanie T. Cushion
- Research Services, Veterans Affairs Medical Center, Cincinnati, OH 45220, USA
- Division of Infectious Diseases, Department of Internal Medicine, University of Cincinnati, OH 45267-0560, USA
| | - Virgílio E. do Rosário
- Centro de Malária e Outras Doenças Tropicais, IHMT - Universidade Nova de Lisboa, P-1349-008 Lisboa, Portugal
| | - Maria M. Mota
- Unidade de Malária, Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, P-1649-028 Lisboa, Portugal
| | - Rui Moreira
- iMed.UL, CECF, Faculdade de Farmácia, Universidade de Lisboa, P-1600-083 Lisboa, Portugal
| | - Paula Gomes
- CIQUP – Centro de Investigação em Química da Universidade do Porto, Departamento de Química, Faculdade de Ciências, Universidade do Porto, P-4169-007 Porto, Portugal
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Vale N, Matos J, Moreira R, Gomes P. Electrospray ionization mass spectrometry as a valuable tool in the characterization of novel primaquine peptidomimetic derivatives. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2009; 15:627-640. [PMID: 19679943 DOI: 10.1255/ejms.1011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Novel primaquine-derived antimalarials have been extensively characterized by electrospray ionization-ion trap mass spectrometry (ESI-MS). Experiments by in-source collision-induced dissociation (CID) in the nozzle- skimmer region (NSR) or by tandem-MS are shown to be most valuable tools for the physicochemical characterization of these 8-aminoquinolinic drugs that also bear the biologically relevant imidazolidin-4-one scaffold. It was possible to find parallelism between compound stability in the NSR and its reactivity towards hydrolysis at physiological pH and T. Moreover, tandem-MS fragmentation patterns were characteristic for each family, providing a means for structural distinction of isomers and allowing to find interesting correlations between the relative abundance of particular fragments and relevant structure-activity determinants, such as Charton steric parameter, v. In conclusion, this work provides solid grounds to establish ESI-MS as a key tool for the physicochemical characterization of biopharmaceuticals bearing the 8-aminoquinoline and/or the imidazolidin-4-one moieties.
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Affiliation(s)
- Nuno Vale
- Centro de Investigação em Química da Universidade do Porto, Departamento de Química, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
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