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Dibello E, Oddone N, Franco J, Illyés TZ, Medeiros A, Kiss A, Hőgye F, Kövér KE, Szilágyi L, Comini MA. Selenosugars targeting the infective stage of Trypanosoma brucei with high selectivity. Int J Parasitol Drugs Drug Resist 2024; 24:100529. [PMID: 38461700 PMCID: PMC10938134 DOI: 10.1016/j.ijpddr.2024.100529] [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: 01/03/2024] [Revised: 02/16/2024] [Accepted: 02/27/2024] [Indexed: 03/12/2024]
Abstract
Earlier evidences showed that diglycosyl diselenides are active against the infective stage of African trypanosomes (top hits IC50 0.5 and 1.5 μM) but poorly selective (selectivity index <10). Here we extended the study to 33 new seleno-glycoconjugates with the aim to improve potency and selectivity. Three selenoglycosides and three glycosyl selenenylsulfides displayed IC50 against bloodstream Trypanosoma brucei in the sub-μM range (IC50 0.35-0.77 μM) and four of them showed an improved selectivity (selectivity index >38-folds vs. murine and human macrohages). For the glycosyl selenylsulfides, the anti-trypanosomal activity was not significantly influenced by the nature of the moiety attached to the sulfur atom. Except for a quinoline-, and to a minor extent a nitro-derivative, the most selective hits induced a rapid (within 60 min) and marked perturbation of the LMWT-redox homeostasis. The formation of selenenylsulfide glycoconjugates with free thiols has been identified as a potential mechanism involved in this process.
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Affiliation(s)
- Estefanía Dibello
- Laboratory Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Mataojo 2020, CP 11400, Montevideo, Uruguay; Organic Chemistry Department, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Natalia Oddone
- Laboratory Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Mataojo 2020, CP 11400, Montevideo, Uruguay
| | - Jaime Franco
- Laboratory Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Mataojo 2020, CP 11400, Montevideo, Uruguay
| | - Tünde-Zita Illyés
- Department of Organic Chemistry, Faculty of Science and Technology, University of Debrecen, Hungary
| | - Andrea Medeiros
- Laboratory Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Mataojo 2020, CP 11400, Montevideo, Uruguay; Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Attila Kiss
- Department of Organic Chemistry, Faculty of Science and Technology, University of Debrecen, Hungary
| | - Fanni Hőgye
- Department of Inorganic and Analytical Chemistry, Faculty of Science and Technology, University of Debrecen, Hungary
| | - Katalin E Kövér
- Department of Inorganic and Analytical Chemistry, Faculty of Science and Technology, University of Debrecen, Hungary
| | - László Szilágyi
- Department of Organic Chemistry, Faculty of Science and Technology, University of Debrecen, Hungary.
| | - Marcelo A Comini
- Laboratory Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Mataojo 2020, CP 11400, Montevideo, Uruguay.
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Hemme P, Philippe JC, Medeiros A, Alekhin A, Houver S, Gallais Y, Sacuto A, Forget A, Colson D, Mantri S, Xu B, Bellaiche L, Cazayous M. Tuning the Multiferroic Properties of BiFeO_{3} under Uniaxial Strain. Phys Rev Lett 2023; 131:116801. [PMID: 37774288 DOI: 10.1103/physrevlett.131.116801] [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] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 08/15/2023] [Indexed: 10/01/2023]
Abstract
More than twenty years ago, multiferroic compounds combining in particular magnetism and ferroelectricity were rediscovered. Since then, BiFeO_{3} has emerged as the most outstanding multiferroic by combining at room temperature almost all the fundamental or applicative properties that may be desired: electroactive spin wave excitations called electromagnons, conductive domain walls, or a low band gap of interest for magnonic devices. All these properties have so far only been discontinuously strain engineered in thin films according to the lattice parameter imposed by the substrate. Here we explore the ferroelectricity and the dynamic magnetic response of BiFeO_{3} bulk under continuously tunable uniaxial strain. Using elasto-Raman spectroscopy, we show that the ferroelectric soft mode is strongly enhanced under tensile strain and driven by the volume preserving deformation at low strain. The magnonic response is entirely modified with low energy magnon modes being suppressed for tensile strain above pointing out a transition from a cycloid to an homogeneous magnetic state. Effective Hamiltonian calculations show that the ferroelectric and the antiferrodistortive modes compete in the tensile regime. In addition, the homogeneous antiferromagnetic state becomes more stable compared to the cycloidal state above a +2% tensile strain close to the experimental value. Finally, we reveal the ferroelectric and magnetic orders of BiFeO_{3} under uniaxial strain and how the tensile strain allows us to unlock and to modify in a differentiated way the polarization and the magnetic structure.
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Affiliation(s)
- P Hemme
- Laboratoire Matériaux et Phénomènes Quantiques, Université Paris Cité, CNRS, 10 rue Alice Domon et Léonie Duquet, 75205 Paris Cedex 13, France
- Synchrotron SOLEIL, L'Orme des Merisiers Saint-Aubin, BP 48, 91192 Gif-sur-Yvette, France
| | - J-C Philippe
- Laboratoire Matériaux et Phénomènes Quantiques, Université Paris Cité, CNRS, 10 rue Alice Domon et Léonie Duquet, 75205 Paris Cedex 13, France
- Laboratoire de Physique des Solides, CNRS, Université Paris-Saclay, 91405 Orsay, France
| | - A Medeiros
- Laboratoire Matériaux et Phénomènes Quantiques, Université Paris Cité, CNRS, 10 rue Alice Domon et Léonie Duquet, 75205 Paris Cedex 13, France
- Université Paris-Saclay, CNRS, Centre de Nanosciences et de Nanotechnologies, 91120, Palaiseau, France
| | - A Alekhin
- Laboratoire Matériaux et Phénomènes Quantiques, Université Paris Cité, CNRS, 10 rue Alice Domon et Léonie Duquet, 75205 Paris Cedex 13, France
| | - S Houver
- Laboratoire Matériaux et Phénomènes Quantiques, Université Paris Cité, CNRS, 10 rue Alice Domon et Léonie Duquet, 75205 Paris Cedex 13, France
| | - Y Gallais
- Laboratoire Matériaux et Phénomènes Quantiques, Université Paris Cité, CNRS, 10 rue Alice Domon et Léonie Duquet, 75205 Paris Cedex 13, France
| | - A Sacuto
- Laboratoire Matériaux et Phénomènes Quantiques, Université Paris Cité, CNRS, 10 rue Alice Domon et Léonie Duquet, 75205 Paris Cedex 13, France
| | - A Forget
- Service de Physique de l'Etat Condensé, CEA Saclay, IRAMIS, SPEC (CNRS URA 2464), F-91191 Gif sur Yvette, France
| | - D Colson
- Service de Physique de l'Etat Condensé, CEA Saclay, IRAMIS, SPEC (CNRS URA 2464), F-91191 Gif sur Yvette, France
| | - S Mantri
- Physics Department and Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, Arkansas 72701, USA
| | - B Xu
- Institute of Theoretical and Applied Physics, Jiangsu Key Laboratory of Thin Films, School of Physical Science and Technology, Soochow University, Suzhou 215006, China
| | - L Bellaiche
- Physics Department and Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, Arkansas 72701, USA
| | - M Cazayous
- Laboratoire Matériaux et Phénomènes Quantiques, Université Paris Cité, CNRS, 10 rue Alice Domon et Léonie Duquet, 75205 Paris Cedex 13, France
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3
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Ruatta SM, Prada Gori DN, Fló Díaz M, Lorenzelli F, Perelmuter K, Alberca LN, Bellera CL, Medeiros A, López GV, Ingold M, Porcal W, Dibello E, Ihnatenko I, Kunick C, Incerti M, Luzardo M, Colobbio M, Ramos JC, Manta E, Minini L, Lavaggi ML, Hernández P, Šarlauskas J, Huerta García CS, Castillo R, Hernández-Campos A, Ribaudo G, Zagotto G, Carlucci R, Medrán NS, Labadie GR, Martinez-Amezaga M, Delpiccolo CML, Mata EG, Scarone L, Posada L, Serra G, Calogeropoulou T, Prousis K, Detsi A, Cabrera M, Alvarez G, Aicardo A, Araújo V, Chavarría C, Mašič LP, Gantner ME, Llanos MA, Rodríguez S, Gavernet L, Park S, Heo J, Lee H, Paul Park KH, Bollati-Fogolín M, Pritsch O, Shum D, Talevi A, Comini MA. Garbage in, garbage out: how reliable training data improved a virtual screening approach against SARS-CoV-2 MPro. Front Pharmacol 2023; 14:1193282. [PMID: 37426813 PMCID: PMC10323144 DOI: 10.3389/fphar.2023.1193282] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 05/31/2023] [Indexed: 07/11/2023] Open
Abstract
Introduction: The identification of chemical compounds that interfere with SARS-CoV-2 replication continues to be a priority in several academic and pharmaceutical laboratories. Computational tools and approaches have the power to integrate, process and analyze multiple data in a short time. However, these initiatives may yield unrealistic results if the applied models are not inferred from reliable data and the resulting predictions are not confirmed by experimental evidence. Methods: We undertook a drug discovery campaign against the essential major protease (MPro) from SARS-CoV-2, which relied on an in silico search strategy -performed in a large and diverse chemolibrary- complemented by experimental validation. The computational method comprises a recently reported ligand-based approach developed upon refinement/learning cycles, and structure-based approximations. Search models were applied to both retrospective (in silico) and prospective (experimentally confirmed) screening. Results: The first generation of ligand-based models were fed by data, which to a great extent, had not been published in peer-reviewed articles. The first screening campaign performed with 188 compounds (46 in silico hits and 100 analogues, and 40 unrelated compounds: flavonols and pyrazoles) yielded three hits against MPro (IC50 ≤ 25 μM): two analogues of in silico hits (one glycoside and one benzo-thiazol) and one flavonol. A second generation of ligand-based models was developed based on this negative information and newly published peer-reviewed data for MPro inhibitors. This led to 43 new hit candidates belonging to different chemical families. From 45 compounds (28 in silico hits and 17 related analogues) tested in the second screening campaign, eight inhibited MPro with IC50 = 0.12-20 μM and five of them also impaired the proliferation of SARS-CoV-2 in Vero cells (EC50 7-45 μM). Discussion: Our study provides an example of a virtuous loop between computational and experimental approaches applied to target-focused drug discovery against a major and global pathogen, reaffirming the well-known "garbage in, garbage out" machine learning principle.
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Affiliation(s)
- Santiago M. Ruatta
- Laboratory Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo, Uruguay
- Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa Fe, Argentina
| | - Denis N. Prada Gori
- Laboratory of Bioactive Compound Research and Development (LIDeB), Faculty of Exact Sciences, National University of La Plata, Buenos Aires, Argentina
| | - Martín Fló Díaz
- Laboratory of Immunovirology, Institut Pasteur de Montevideo, Montevideo, Uruguay
- Departamento de Inmunobiología, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Franca Lorenzelli
- Laboratory Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Karen Perelmuter
- Cell Biology Unit, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Lucas N. Alberca
- Laboratory of Bioactive Compound Research and Development (LIDeB), Faculty of Exact Sciences, National University of La Plata, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Carolina L. Bellera
- Laboratory of Bioactive Compound Research and Development (LIDeB), Faculty of Exact Sciences, National University of La Plata, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Andrea Medeiros
- Laboratory Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo, Uruguay
- Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Gloria V. López
- Departamento de Química Orgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
- Vascular Biology and Drug Discovery Lab, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Mariana Ingold
- Vascular Biology and Drug Discovery Lab, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Williams Porcal
- Departamento de Química Orgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
- Vascular Biology and Drug Discovery Lab, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Estefanía Dibello
- Departamento de Química Orgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Irina Ihnatenko
- PVZ—Center of Pharmaceutical Engineering, Institute of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Germany
| | - Conrad Kunick
- PVZ—Center of Pharmaceutical Engineering, Institute of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Germany
| | - Marcelo Incerti
- Departamento de Química Orgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Martín Luzardo
- Departamento de Química Orgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Maximiliano Colobbio
- Departamento de Química Orgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
- Laboratorio de Química Fina, Facultad de Química, Instituto Polo Tecnológico de Pando, Universidad de la República, Montevideo, Uruguay
| | - Juan Carlos Ramos
- Departamento de Química Orgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
- Laboratorio de Química Fina, Facultad de Química, Instituto Polo Tecnológico de Pando, Universidad de la República, Montevideo, Uruguay
| | - Eduardo Manta
- Departamento de Química Orgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
- Laboratorio de Química Fina, Facultad de Química, Instituto Polo Tecnológico de Pando, Universidad de la República, Montevideo, Uruguay
| | - Lucía Minini
- Departamento de Química Orgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - María Laura Lavaggi
- Laboratorio de Química Biológica Ambiental, Sede Rivera, Centro Universitario Regional Noreste, Universidad de la República, Montevideo, Uruguay
| | - Paola Hernández
- Departamento de Genética, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, Uruguay
| | - Jonas Šarlauskas
- Life Sciences Centre, Department of Xenobiotic Biochemistry, Institute of Biochemistry, Vilnius University, Vilnius, Lithuania
| | | | - Rafael Castillo
- Departamento de Farmacia, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de Mexico, Mexico
| | - Alicia Hernández-Campos
- Departamento de Farmacia, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de Mexico, Mexico
| | - Giovanni Ribaudo
- Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
| | - Giuseppe Zagotto
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy
| | - Renzo Carlucci
- Facultad de Ciencias Bioquímicas y Farmacéuticas, Instituto de Química Rosario (IQUIR) UNR, CONICET, Universidad Nacional de Rosario, Rosario, Argentina
| | - Noelia S. Medrán
- Facultad de Ciencias Bioquímicas y Farmacéuticas, Instituto de Química Rosario (IQUIR) UNR, CONICET, Universidad Nacional de Rosario, Rosario, Argentina
| | - Guillermo R. Labadie
- Facultad de Ciencias Bioquímicas y Farmacéuticas, Instituto de Química Rosario (IQUIR) UNR, CONICET, Universidad Nacional de Rosario, Rosario, Argentina
| | - Maitena Martinez-Amezaga
- Facultad de Ciencias Bioquímicas y Farmacéuticas, Instituto de Química Rosario (IQUIR) UNR, CONICET, Universidad Nacional de Rosario, Rosario, Argentina
| | - Carina M. L. Delpiccolo
- Facultad de Ciencias Bioquímicas y Farmacéuticas, Instituto de Química Rosario (IQUIR) UNR, CONICET, Universidad Nacional de Rosario, Rosario, Argentina
| | - Ernesto G. Mata
- Facultad de Ciencias Bioquímicas y Farmacéuticas, Instituto de Química Rosario (IQUIR) UNR, CONICET, Universidad Nacional de Rosario, Rosario, Argentina
| | - Laura Scarone
- Departamento de Química Orgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Laura Posada
- Departamento de Química Orgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Gloria Serra
- Departamento de Química Orgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | | | - Kyriakos Prousis
- Institute of Chemical Biology, National Hellenic Research Foundation, Athens, Greece
| | - Anastasia Detsi
- Laboratory of Organic Chemistry, School of Chemical Engineering, National Technical University of Athens, Athens, Greece
| | - Mauricio Cabrera
- Laboratorio de Moléculas Bioactivas, Departamento de Ciencias Biológicas, CENUR Litoral Norte, Universidad de la República, Paysandú, Uruguay
| | - Guzmán Alvarez
- Laboratorio de Moléculas Bioactivas, Departamento de Ciencias Biológicas, CENUR Litoral Norte, Universidad de la República, Paysandú, Uruguay
| | - Adrián Aicardo
- Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
- Centro de Investigaciones Biomédicas (CEINBIO), Universidad de la República, Montevideo, Uruguay
- Departamento de Nutrición Clínica, Escuela de Nutrición, Universidad de la República, Montevideo, Uruguay
| | - Verena Araújo
- Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
- Centro de Investigaciones Biomédicas (CEINBIO), Universidad de la República, Montevideo, Uruguay
- Departamento de Alimentos, Escuela de Nutrición, Universidad de la República, Montevideo, Uruguay
| | - Cecilia Chavarría
- Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
- Centro de Investigaciones Biomédicas (CEINBIO), Universidad de la República, Montevideo, Uruguay
| | | | - Melisa E. Gantner
- Laboratory of Bioactive Compound Research and Development (LIDeB), Faculty of Exact Sciences, National University of La Plata, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Manuel A. Llanos
- Laboratory of Bioactive Compound Research and Development (LIDeB), Faculty of Exact Sciences, National University of La Plata, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Santiago Rodríguez
- Laboratory of Bioactive Compound Research and Development (LIDeB), Faculty of Exact Sciences, National University of La Plata, Buenos Aires, Argentina
| | - Luciana Gavernet
- Laboratory of Bioactive Compound Research and Development (LIDeB), Faculty of Exact Sciences, National University of La Plata, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Soonju Park
- Screening Discovery Platform, Institut Pasteur Korea, Seongnam, Republic of Korea
| | - Jinyeong Heo
- Screening Discovery Platform, Institut Pasteur Korea, Seongnam, Republic of Korea
| | - Honggun Lee
- Screening Discovery Platform, Institut Pasteur Korea, Seongnam, Republic of Korea
| | - Kyu-Ho Paul Park
- Screening Discovery Platform, Institut Pasteur Korea, Seongnam, Republic of Korea
| | | | - Otto Pritsch
- Laboratory of Immunovirology, Institut Pasteur de Montevideo, Montevideo, Uruguay
- Departamento de Inmunobiología, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - David Shum
- Screening Discovery Platform, Institut Pasteur Korea, Seongnam, Republic of Korea
| | - Alan Talevi
- Laboratory of Bioactive Compound Research and Development (LIDeB), Faculty of Exact Sciences, National University of La Plata, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Marcelo A. Comini
- Laboratory Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo, Uruguay
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Daghero H, Pagotto R, Quiroga C, Medeiros A, Comini MA, Bollati-Fogolín M. Murine colon organoids as a novel model to study Trypanosoma cruzi infection and interactions with the intestinal epithelium. Front Cell Infect Microbiol 2023; 13:1082524. [PMID: 36968103 PMCID: PMC10033869 DOI: 10.3389/fcimb.2023.1082524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 10/28/2022] [Accepted: 02/20/2023] [Indexed: 03/11/2023] Open
Abstract
Chagas disease (CD) is a life-threatening illness caused by the parasite Trypanosoma cruzi (T. cruzi). With around seven million people infected worldwide and over 50,000 deaths per year, CD is a major public health issue in Latin America. The main route of transmission to humans is through a triatomine bug (vector-borne), but congenital and oral transmission have also been reported. The acute phase of CD presents mild symptoms but may develop into a long-lasting chronic illness, characterized by severely impaired cardiac, digestive, and neurological functions. The intestinal tissue appears to have a key role during oral transmission and chronic infection of CD. In this immune-privileged reservoir, dormant/quiescent parasites have been suggested to contribute to disease persistence, infection relapse, and treatment failure. However, the interaction between the intestinal epithelium and T. cruzi has not been examined in depth, in part, due to the lack of in vitro models that approximate to the biological and structural complexity of this tissue. Therefore, to understand the role played by the intestinal tissue during transmission and chronic infection, physiological models resembling the organ complexity are needed. Here we addressed this issue by establishing and characterizing adult stem cell-derived colonoid infection models that are clinically relevant for CD. 3D and 2D systems of murine intestinal organoids infected with T. cruzi Dm28c (a highly virulent strain associated with oral outbreaks) were analyzed at different time points by confocal microscopy. T. cruzi was able to invade and replicate in intestinal epithelial primary cells grown as intact organoids (3D) and monolayers (2D). The permissiveness to pathogen infection differed markedly between organoids and cell lines (primate and intestinal human cell lines). So far, this represents the first evidence of the potential that these cellular systems offer for the study of host-pathogen interactions and the discovery of effective anti-chagasic drugs.
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Affiliation(s)
- Hellen Daghero
- Cell Biology Unit, Institut Pasteur Montevideo, Montevideo, Uruguay
| | - Romina Pagotto
- Cell Biology Unit, Institut Pasteur Montevideo, Montevideo, Uruguay
| | - Cristina Quiroga
- Redox Biology of Trypanosomes Lab, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Andrea Medeiros
- Redox Biology of Trypanosomes Lab, Institut Pasteur de Montevideo, Montevideo, Uruguay
- Department of Biochemistry, Faculty of Medicine, University of the Republic, Montevideo, Uruguay
| | - Marcelo A Comini
- Redox Biology of Trypanosomes Lab, Institut Pasteur de Montevideo, Montevideo, Uruguay
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5
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Rivas F, Del Mármol C, Scalese G, Pérez-Díaz L, Machado I, Blacque O, Medeiros A, Comini M, Gambino D. New multifunctional Ru(II) organometallic compounds show activity against Trypanosoma brucei and Leishmania infantum. J Inorg Biochem 2022; 237:112016. [PMID: 36244312 DOI: 10.1016/j.jinorgbio.2022.112016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 09/24/2022] [Accepted: 09/26/2022] [Indexed: 11/06/2022]
Abstract
Human African trypanosomiasis (sleeping sickness) and leishmaniasis are prevalent zoonotic diseases caused by genomically related trypanosomatid protozoan parasites (Trypanosoma brucei and Leishmania spp). Additionally, both are co-endemic in certain regions of the world. Only a small number of old drugs exist for their treatment, with most of them sharing poor safety, efficacy, and pharmacokinetic profiles. In this work, new multifunctional Ru(II) ferrocenyl compounds were rationally designed as potential agents against these trypanosomatid parasites by including in a single molecule 1,1'-bis(diphenylphosphino)ferrocene (dppf) and two bioactive bidentate ligands: 8-hydroxyquinoline derivatives (8HQs) and polypyridyl ligands (NN). Three [Ru(8HQs)(dppf)(NN)](PF6) compounds were synthesized and fully characterized. They showed in vitro activity on bloodstream Trypanosoma brucei (IC50 140-310 nM) and on Leishmania infantum promastigotes (IC50 3.0-4.8 μM). The compounds showed good selectivity towards T. brucei in respect to J774 murine macrophages as mammalian cell model (SI 15-38). Changing hexafluorophosphate counterion by chloride led to a three-fold increase in activity on both parasites and to a two to three-fold increase in selectivity towards the pathogens. The compounds affect in vitro at least the targets of the individual bioactive moieties included in the new chemical entities: DNA and generation of ROS. The compounds are stable in solution and are more lipophilic than the free bioactive ligands. No clear correlation between lipophilicity, interaction with DNA or generation of ROS and activity was detected, which agrees with their overall similar anti-trypanosoma potency and selectivity. These compounds are promising candidates for further drug development.
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Affiliation(s)
- Feriannys Rivas
- Área Química Inorgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay; Programa de Posgrado en Química, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Carolina Del Mármol
- Área Química Inorgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Gonzalo Scalese
- Área Química Inorgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Leticia Pérez-Díaz
- Laboratorio de Interacciones Moleculares, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Ignacio Machado
- Área Química Analítica, Universidad de la República, Montevideo, Uruguay
| | - Olivier Blacque
- Department of Chemistry, University of Zurich, Zurich, Switzerland
| | - Andrea Medeiros
- Group Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo, Uruguay; Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Marcelo Comini
- Group Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Dinorah Gambino
- Área Química Inorgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay.
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Barreiro-Costa O, Quiroga Lozano C, Muñoz E, Rojas-Silva P, Medeiros A, Comini MA, Heredia-Moya J. Evaluation of the Anti- Leishmania mexicana and - Trypanosoma brucei Activity and Mode of Action of 4,4'-(Arylmethylene)bis(3-methyl-1-phenyl-1 H-pyrazol-5-ol). Biomedicines 2022; 10:biomedicines10081913. [PMID: 36009460 PMCID: PMC9405596 DOI: 10.3390/biomedicines10081913] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 07/07/2022] [Indexed: 11/23/2022] Open
Abstract
Trypanosomiasis and leishmaniasis are neglected infections caused by trypanosomatid parasites. The first-line treatments have many adverse effects, high costs, and are prone to resistance development, hence the necessity for new chemotherapeutic options. In line with this, twenty five 4,4′-(arylmethylene)bis(1H-pyrazol-5-ols) derivatives were synthesized and evaluated in vitro for their anti-trypanosomatid activity. Ten and five compounds from this series showed IC50 ≤ 10 µM against the promastigote and the bloodstream stage of Leishmania mexicana and Trypanosoma brucei brucei, respectively. Overall, derivatives with pyrazole rings substituted with electron-withdrawing groups proved more active than those with electron-donating groups. The hits proved moderately selective towards L. mexicana and T. brucei (selectivity index, SI, compared to murine macrophages = 5−26). The exception was one derivative displaying an SI (>111−189) against T. brucei that surpassed, by >6-fold, the selectivity of the clinical drug nifurtimox (SI = 13−28.5). Despite sharing a common scaffold, the hits differed in their mechanism of action, with halogenated derivatives inducing a rapid and marked intracellular oxidative milieu in infective T. brucei. Notably, most of the hits presented better absorption, distribution, metabolism, and excretion (ADME) properties than the reference drugs. Several of the bioactive molecules herein identified represent a promising starting point for further improvement of their trypanosomatid potency and selectivity.
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Affiliation(s)
- Olalla Barreiro-Costa
- Center for Biomedical Research (CENBIO), Eugenio Espejo College of Health Sciences, Universidad UTE, Quito 170527, Ecuador
| | - Cristina Quiroga Lozano
- Laboratory Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo 11400, Uruguay
| | - Erika Muñoz
- Instituto de Microbiología y Programa de Maestría en Microbiología, Colegio de Ciencias Biológicas y Ambientales COCIBA, Universidad San Francisco de Quito, Quito 170901, Ecuador
| | - Patricio Rojas-Silva
- Center for Biomedical Research (CENBIO), Eugenio Espejo College of Health Sciences, Universidad UTE, Quito 170527, Ecuador
- Instituto de Microbiología y Programa de Maestría en Microbiología, Colegio de Ciencias Biológicas y Ambientales COCIBA, Universidad San Francisco de Quito, Quito 170901, Ecuador
| | - Andrea Medeiros
- Laboratory Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo 11400, Uruguay
- Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo 11800, Uruguay
| | - Marcelo A. Comini
- Laboratory Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo 11400, Uruguay
- Correspondence: (M.A.C.); (J.H.-M.)
| | - Jorge Heredia-Moya
- Center for Biomedical Research (CENBIO), Eugenio Espejo College of Health Sciences, Universidad UTE, Quito 170527, Ecuador
- Correspondence: (M.A.C.); (J.H.-M.)
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7
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Benítez D, Medeiros A, Quiroga C, Comini MA. A Simple Bioluminescent Assay for the Screening of Cytotoxic Molecules Against the Intracellular Form of Leishmania infantum. Methods Mol Biol 2022; 2524:127-147. [PMID: 35821468 DOI: 10.1007/978-1-0716-2453-1_10] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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] [Indexed: 06/15/2023]
Abstract
This chapter describes a viability assay for the intracellular (amastigote) and clinically relevant form of Leishmania infantum that is based on the detection of bioluminescence (BL) signal. The assay uses a reporter cell line of L. infantum that expresses constitutively a redshifted luciferase from Photinus pyralis and murine macrophages (cell line J774.A1) as host cells for infection. The host cell line was selected because it is a differentiated cell line, easy to manipulate in vitro, and advantageous for ethical reasons. This chapter introduces an assay designed for the screening of bioactive compounds/molecules employing a 96-well microplate and a 24 h treatment. The assay setup shows excellent balance between simplicity (cell culture manipulation/infection and timing) and quality parameters, as well as potential to detect drug-like molecules acting in a fast and cytotoxic manner.
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Affiliation(s)
- Diego Benítez
- Group Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo, Uruguay.
| | - Andrea Medeiros
- Group Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo, Uruguay
- Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Cristina Quiroga
- Group Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Marcelo A Comini
- Group Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo, Uruguay.
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Bredemeier M, Duarte A, Pinheiro M, Stadler B, Macieira JC, Ranza R, Miranda J, Valim V, Castro G, Bertolo M, Sauma MDF, Fernandes V, Medeiros A, Botelho R, Brenol C, Negrão Gonçalo Dias D, Carvalho H, Studart S, Da Rocha Castelar Pinheiro G, Rocha L, Pereira I, Ohira Gazzeta M, Maria Kakehasi A, Louzada P, Hayata ALS, Pina F, Lupo C, Balarini L, Silveira I, Kowalski S, Titton D, Chakr R, Ranzolin A, Laurindo I, Xavier R. POS0676 SURVIVAL OF THE FIRST COURSE OF BIOLOGIC OR JAK INHIBITOR IN RHEUMATOID ARTHRITIS: ASSOCIATION WITH THE CHOICE OF AGENT AND CONCOMITANT CONVENTIONAL SYNTHETIC DMARDS. Ann Rheum Dis 2021. [DOI: 10.1136/annrheumdis-2021-eular.3841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:After failure of conventional synthetic disease modifying anti-rheumatic drugs (csDMARDs) in the therapy of rheumatoid arthritis (RA), treatment may be escalated to biologic (bDMARDs) or JAK inhibitors (JAKi) (1). Analysis of drug survival can provide useful information on the effectiveness of these therapeutic schemes.Objectives:to evaluate the association of the choice of therapeutic agent with the survival of treatment course in RA patients receiving their first bDMARD or JAKi.Methods:BiobadaBrasil is a multicentric registry-based cohort study of Brazilian patients starting their first bDMARD/JAKi (2). This analysis includes RA patients recruited from Jan 2009 to Oct 2019, followed-up over the first course of treatment with a bDMARD/JAKi until censoring (latest date, Nov 19, 2019) or occurrence of the outcome of interest. A treatment course is defined as a period during which the medication scheme does not change, except for dose adjustments. The primary outcome was the interruption of treatment course for any reason (except for pregnancy or disease remission); interruption of treatment due to adverse events (AEs) or death and due to inefficacy served as secondary outcomes. Multivariate Cox proportional hazards models were used for analyses.Results:In total, 1177 patients (3800 patient-years [PY]) were enrolled. The overall incidence of treatment interruption was 17.5/100 PY. Adalimumab was the most frequently prescribed agent, followed by infliximab (n= 267). The hazards ratios (HR) of the primary and secondary outcomes are presented in Table 1. Figure 1 compares the survival of treatment curves of different bDMARDs/JAKi.Table 1.Hazard ratios (HR) of interruption of therapy course of each therapeutic agent (the reference category for bDMARDs/ JAKi is infliximab). Results are HR, 95% CIs, and P values*.Agent (number of patients)Interruption for any reason (665 events)Interruption due to adverse events or death (196 events)Interruption due to inefficacy (319 events)Adalimumab (354)0.83 (0.68 to 1.01), P= 0.0620.68 (0.48 to 0.96), P=0.0291.08 (0.80 to 1.44), P=0.621Etanercept (257)0.81 (0.66 to 1.01), P=0.0630.56 (0.37 to 0.83), P=0.0040.93 (0.68 to 1.29), P=0.674Certolizumab (80)0.74 (0.47 to 1.16), P=0.1850.33 (0.13 to 0.86), P=0.0241.32 (0.74 to 2.35), P=0.350Golimumab (53)0.86 (0.53 to 1.38), P=0.5300.46 (0.18 to 1.19), P=0.1111.07 (0.53 to 2.15), P=0.849JAKi (tofacitinib) (59)0.54 (0.30 to 0.99), P=0.0470.19 (0.04 to 0.82), P=0.0260.89 (0.41 to 1.96), P=0.779Rituximab (48)0.87 (0.55 to 1.37), P=0.5400.48 (0.20 to 1.18), P=0.1090.58 (0.26 to 1.34), P=0.205Abatacept (30)0.52 (0.25 to 1.07), P=0.0770.46 (0.14 to 1.56), P=0.2150.46 (0.14 to 1.52), P=0.203Tocilizumab (29)0.29 (0.14 to 0.63), P=0.0020.40 (0.12 to 1.30), P=0.1260.28 (0.09 to 0.90), P=0.033Methotrexate (792)0.95 (0.79 to 1.14), P=0.5610.86 (0.62 to 1.19), P=0.3620.98 (0.75 to 1.28), P=0.860Leflunomide (497)1.17 (0.99 to 1.39), P=0.0611.44 (1.06 to 1.96), P=0.0201.02 (0.80 to 1.30), P=0.856Sulfasalazine (48)1.18 (0.80 to 1.75), P=0.4011.94 (1.07 to 3.54), P=0.0300.85 (0.45 to 1.59), P=0.605Antimalarials (230)0.80 (0.65 to 0.98), P=0.0270.67 (0.45 to 0.99), P=0.0430.67 (0.50 to 0.92), P=0.011* All tests adjusted for other variables presented in the table and for age, baseline DAS28, disease duration, gender, smoking, seropositivity (RF/anti-CCP), previous malignancy, diabetes, hypertension, hypercholesterolemia, renal failure, ischemic cardiomyopathy, COPD, heart failure, use of corticosteroids, starting year, hypercholesterolemia, osteoporosis, hepatitis B and C.Conclusion:In our study, infliximab was related to an overall higher hazard of treatment course interruption than tolicizumab and tofacitinib, and higher hazard of interruption due to AEs than most other anti-TNF agents and tofacitinib. Maintaining antimalarials in patients receiving advanced therapies for RA may reduce interruption of treatment due to inefficacy and AEs.Disclosure of Interests:None declared
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Fuggle NR, Singer A, Gill C, Patel A, Medeiros A, Mlotek AS, Pierroz DD, Halbout P, Harvey NC, Reginster JY, Cooper C, Greenspan SL. How has COVID-19 affected the treatment of osteoporosis? An IOF-NOF-ESCEO global survey. Osteoporos Int 2021; 32:611-617. [PMID: 33558957 PMCID: PMC7869913 DOI: 10.1007/s00198-020-05793-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 12/09/2020] [Indexed: 11/23/2022]
Abstract
The effects of COVID-19 have the potential to impact on the management of chronic diseases including osteoporosis. A global survey has demonstrated that these impacts include an increase in telemedicine consultations, delays in DXA scanning, interruptions in the supply of medications and reductions in parenteral medication delivery. INTRODUCTION The COVID-19 pandemic has had profound effects on the health of the global population both directly, via the sequelae of the infection, and indirectly, including the relative neglect of chronic disease management. Together the International Osteoporosis Foundation and National Osteoporosis Foundation sought to ascertain the impact on osteoporosis management. METHODS Questionnaires were electronically circulated to a sample of members of both learned bodies and included information regarding the location and specialty of respondents, current extent of face to face consultations, alterations in osteoporosis risk assessment, telemedicine experience, alterations to medication ascertainment and delivery and electronic health record (EHR) utilisation. Responses were collected, quantitative data analysed, and qualitative data assessed for recurring themes. RESULTS Responses were received from 209 healthcare workers from 53 countries, including 28% from Europe, 24% from North America, 19% from the Asia Pacific region, 17% from the Middle East and 12% from Latin America. Most respondents were physicians (85%) with physician assistants, physical therapists and nurses/nurse practitioners represented in the sample. The main three specialties represented included rheumatology (40%), endocrinology (22%) and orthopaedics (15%). In terms of the type of patient contact, 33% of respondents conducted telephone consultations and 21% video consultations. Bone mineral density assessment by dual-energy X-ray absorptiometry (DXA) usage was affected with only 29% able to obtain a scan as recommended. The majority of clinicians (60%) had systems in place to identify patients receiving parenteral medication, and 43% of clinicians reported difficulty in arranging appropriate osteoporosis medications during the COVID-19 crisis. CONCLUSIONS To conclude through surveying a global sample of osteoporosis healthcare professionals, we have observed an increase in telemedicine consultations, delays in DXA scanning, interrupted supply of medications and reductions in parenteral medication delivery.
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Affiliation(s)
- N R Fuggle
- MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK
- Alan Turing Institute, London, UK
| | - A Singer
- Departments of Medicine and Obstetrics and Gynecology, MedStar Georgetown University Hospital, Georgetown University Medical Center, Washington, DC, USA
| | - C Gill
- National Osteoporosis Foundation, Arlington, VA, USA
| | - A Patel
- National Osteoporosis Foundation, Arlington, VA, USA
| | - A Medeiros
- National Osteoporosis Foundation, Arlington, VA, USA
| | - A S Mlotek
- International Osteoporosis Foundation, Nyon, Switzerland
| | - D D Pierroz
- International Osteoporosis Foundation, Nyon, Switzerland
| | - P Halbout
- International Osteoporosis Foundation, Nyon, Switzerland
| | - N C Harvey
- MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK
| | - J-Y Reginster
- WHO Collaborating Center for Public Health Aspects of Musculo-Skeletal Health and Ageing, University of Liège, Liege, Belgium
- Biochemistry Department, College of Science, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - C Cooper
- MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK.
- NIHR Musculoskeletal Biomedical Research Unit, University of Oxford, Oxford, UK.
| | - S L Greenspan
- Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
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10
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Fuggle NR, Singer A, Gill C, Patel A, Medeiros A, Mlotek AS, Pierroz DD, Halbout P, Harvey NC, Reginster JY, Cooper C, Greenspan SL. Correction to: How has COVID-19 affected the treatment of osteoporosis? An IOF-NOF-ESCEO global survey. Osteoporos Int 2021; 32:801. [PMID: 33751152 PMCID: PMC7942214 DOI: 10.1007/s00198-021-05905-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
A Correction to this paper has been published: 10.1007/s00198-021-05905-7
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Affiliation(s)
- N R Fuggle
- MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK
- Alan Turing Institute, London, UK
| | - A Singer
- Departments of Medicine and Obstetrics and Gynecology, MedStar Georgetown University Hospital, Georgetown University Medical Center, Washington, DC, USA
| | - C Gill
- National Osteoporosis Foundation, Arlington, VA, USA
| | - A Patel
- National Osteoporosis Foundation, Arlington, VA, USA
| | - A Medeiros
- National Osteoporosis Foundation, Arlington, VA, USA
| | - A S Mlotek
- International Osteoporosis Foundation, Nyon, Switzerland
| | - D D Pierroz
- International Osteoporosis Foundation, Nyon, Switzerland
| | - P Halbout
- International Osteoporosis Foundation, Nyon, Switzerland
| | - N C Harvey
- MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK
| | - J-Y Reginster
- WHO Collaborating Center for Public Health Aspects of Musculo-Skeletal Health and Ageing, University of Liège, Liege, Belgium
- Biochemistry Department, College of Science, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - C Cooper
- MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK.
- NIHR Musculoskeletal Biomedical Research Unit, University of Oxford, Oxford, UK.
| | - S L Greenspan
- Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
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Rivas F, Medeiros A, Quiroga C, Benítez D, Comini M, Rodríguez-Arce E, Machado I, Cerecetto H, Gambino D. New Pd-Fe ferrocenyl antiparasitic compounds with bioactive 8-hydroxyquinoline ligands: a comparative study with their Pt-Fe analogues. Dalton Trans 2021; 50:1651-1665. [PMID: 33449983 DOI: 10.1039/d0dt03963b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
In the search for a more effective chemotherapy for the treatment of Human African Trypanosomiasis, a disease caused by the parasite Trypanosoma brucei, the development of ferrocenyl compounds has arisen as a promising strategy. In this work, five new Pd-Fe heterobimetallic [PdII(L)(dppf)](PF6) compounds, including 8-hydroxyquinolyl derivatives HL1-HL5 as bioactive ligands and dppf = 1,1'-bis(diphenylphosphino)ferrocene as the organometallic co-ligand, were synthesized and fully characterized in the solid state and in solution. Molecular structures of three compounds were solved by single crystal X-ray diffraction methods. The compounds displayed submicromolar or micromolar IC50 values against bloodstream T. brucei (IC50: 0.33-1.2 μM), and good selectivity towards the pathogen (SI: 4-102) with respect to mammalian macrophages (cell line J774). The new Pd complexes proved to be 2-fold to 45-fold more potent than the drug nifurtimox but most of them are less active than their Pt analogues. Potential molecular targets were studied. The complexes interact with DNA but they do not alter the intracellular thiol-redox homeostasis of the parasite. In order to understand and predict the main structural determinants on the anti-T. brucei activity, a search of quantitative structure-activity relationships (QSAR) was performed including all the [M(L)(dppf)](PF6) complexes, where M = Pd(ii) or Pt(ii), currently and previously developed by us. The correlation obtained shows the relevance of the electronic effects, the lipophilicity and the type of metal. According to the QSAR study, compounds with electron-withdrawing ligands, higher lipophilicity and harboring Pt would result in higher T. brucei cytotoxicity. From the whole series of [M(L)(dppf)](PF6) compounds developed, where M = Pt(ii) or Pd(ii) and HL = 8-hydroxyquinolyl derivatives, Pt-dppf-L4 (IC50 = 0.14 μM, SI = 48) was selected to perform an exploratory pre-clinical study in infected mice. This hit compound lacks acute toxicity when applied to animals in the dose/regimen described and exerts an anti-proliferative effect on parasites, which extends animal survival but is not curative.
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Affiliation(s)
- Feriannys Rivas
- Área Química Inorgánica, Programa de Posgrados, Facultad de Química, Universidad de la República, Gral. Flores 2124, 11800 Montevideo, Uruguay.
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12
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Medeiros A, Benítez D, Korn RS, Ferreira VC, Barrera E, Carrión F, Pritsch O, Pantano S, Kunick C, de Oliveira CI, Orban OCF, Comini MA. Mechanistic and biological characterisation of novel N5-substituted paullones targeting the biosynthesis of trypanothione in Leishmania. J Enzyme Inhib Med Chem 2020; 35:1345-1358. [PMID: 32588679 PMCID: PMC7717452 DOI: 10.1080/14756366.2020.1780227] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 12/02/2022] Open
Abstract
Trypanothione synthetase (TryS) produces N1,N8-bis(glutathionyl)spermidine (or trypanothione) at the expense of ATP. Trypanothione is a metabolite unique and essential for survival and drug-resistance of trypanosomatid parasites. In this study, we report the mechanistic and biological characterisation of optimised N5-substituted paullone analogues with anti-TryS activity. Several of the new derivatives retained submicromolar IC50 against leishmanial TryS. The binding mode to TryS of the most potent paullones has been revealed by means of kinetic, biophysical and molecular modelling approaches. A subset of analogues showed an improved potency (EC50 0.5–10 µM) and selectivity (20–35) against the clinically relevant stage of Leishmania braziliensis (mucocutaneous leishmaniasis) and L. infantum (visceral leishmaniasis). For a selected derivative, the mode of action involved intracellular depletion of trypanothione. Our findings shed light on the molecular interaction of TryS with rationally designed inhibitors and disclose a new set of compounds with on-target activity against different Leishmania species.
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Affiliation(s)
- Andrea Medeiros
- Laboratory Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo, Uruguay.,Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Diego Benítez
- Laboratory Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Ricarda S Korn
- Institut für Medizinische und Pharmazeutische Chemie, Technische Universität Braunschweig, Braunschweig, Germany
| | | | - Exequiel Barrera
- Biomolecular Simulations Group, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Federico Carrión
- Protein Biophysics Unit, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Otto Pritsch
- Protein Biophysics Unit, Institut Pasteur de Montevideo, Montevideo, Uruguay.,Departamento de Inmunobiología, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Sergio Pantano
- Biomolecular Simulations Group, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Conrad Kunick
- Institut für Medizinische und Pharmazeutische Chemie, Technische Universität Braunschweig, Braunschweig, Germany
| | | | - Oliver C F Orban
- Institut für Medizinische und Pharmazeutische Chemie, Technische Universität Braunschweig, Braunschweig, Germany
| | - Marcelo A Comini
- Laboratory Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo, Uruguay
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Rivas F, Medeiros A, Comini M, Suescun L, Rodríguez Arce E, Martins M, Pinheiro T, Marques F, Gambino D. Pt-Fe ferrocenyl compounds with hydroxyquinoline ligands show selective cytotoxicity on highly proliferative cells. J Inorg Biochem 2019; 199:110779. [DOI: 10.1016/j.jinorgbio.2019.110779] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 07/12/2019] [Accepted: 07/14/2019] [Indexed: 01/23/2023]
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Vairoletti F, Medeiros A, Fontán P, Meléndrez J, Tabárez C, Salinas G, Franco J, Comini MA, Saldaña J, Jancik V, Mahler G, Saiz C. Synthesis of bicyclic 1,4-thiazepines as novel anti- Trypanosoma brucei brucei agents. Medchemcomm 2019; 10:1481-1487. [PMID: 31673311 DOI: 10.1039/c9md00064j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 06/09/2019] [Indexed: 11/21/2022]
Abstract
1,4-Thiazepines derivatives are pharmacologically important heterocycles with different applications in medicinal chemistry. In the present work, we describe the preparation of new bicyclic thiazolidinyl-1,4-thiazepines 3 by reaction between azadithiane compounds and Michael acceptors. The reaction scope was explored and the yields were optimized. The activity of the new compounds was evaluated against Nippostrongylus brasiliensis and Caenorhabditis elegans as anthelmintic models and Trypanosoma brucei brucei. The most active compound was 3l, showing an EC50 = 2.8 ± 0.7 μM against T. b. brucei and a selectivity index >71.
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Affiliation(s)
- Franco Vairoletti
- Laboratorio de Química Farmacéutica , Departamento de Química Orgánica , Facultad de Química , Universidad de la República , Montevideo , Uruguay . ;
| | - Andrea Medeiros
- Group Redox Biology of Trypanosomes , Institut Pasteur de Montevideo , Montevideo , Uruguay.,Departamento de Bioquímica , Facultad de Medicina , Universidad de la República , Montevideo , Uruguay
| | - Pablo Fontán
- Laboratorio de Química Farmacéutica , Departamento de Química Orgánica , Facultad de Química , Universidad de la República , Montevideo , Uruguay . ;
| | - Jennifer Meléndrez
- Laboratorio de Química Farmacéutica , Departamento de Química Orgánica , Facultad de Química , Universidad de la República , Montevideo , Uruguay . ;
| | - Carlos Tabárez
- Laboratorio de Química Farmacéutica , Departamento de Química Orgánica , Facultad de Química , Universidad de la República , Montevideo , Uruguay . ;
| | - Gustavo Salinas
- Worm Biology Laboratory , Unidad Mixta Institut Pasteur de Montevideo-Facultad de Química , UdelaR , Montevideo , Uruguay
| | - Jaime Franco
- Group Redox Biology of Trypanosomes , Institut Pasteur de Montevideo , Montevideo , Uruguay
| | - Marcelo A Comini
- Group Redox Biology of Trypanosomes , Institut Pasteur de Montevideo , Montevideo , Uruguay
| | - Jenny Saldaña
- Laboratorio de Experimentación Animal , Depto de Ciencias Farmacéuticas , Facultad de Química , Universidad de la República , Montevideo , Uruguay
| | - Vojtech Jancik
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM , Toluca , Mexico
| | - Graciela Mahler
- Laboratorio de Química Farmacéutica , Departamento de Química Orgánica , Facultad de Química , Universidad de la República , Montevideo , Uruguay . ;
| | - Cecilia Saiz
- Laboratorio de Química Farmacéutica , Departamento de Química Orgánica , Facultad de Química , Universidad de la República , Montevideo , Uruguay . ;
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15
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Rodríguez Arce E, Putzu E, Lapier M, Maya JD, Olea Azar C, Echeverría GA, Piro OE, Medeiros A, Sardi F, Comini M, Risi G, Salinas G, Correia I, Pessoa JC, Otero L, Gambino D. New heterobimetallic ferrocenyl derivatives are promising antitrypanosomal agents. Dalton Trans 2019; 48:7644-7658. [PMID: 31049548 DOI: 10.1039/c9dt01317b] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
In the search for a more effective chemotherapy for the treatment of Chagas' disease and human African trypanosomiasis, caused by Trypanosoma cruzi and Trypanosoma brucei parasites, respectively, the use of organometallic compounds may be a promising strategy. In this work, eight new heterobimetallic compounds are described including four 5-nitrofuryl containing thiosemicarbazones as bioactive ligands (HL1-HL4) and dppf = 1,1'-bis(diphenylphosphino) ferrocene as an organometallic co-ligand. Complexes of the formula [MII(L)(dppf)](PF6) with M = Pd or Pt were synthesized and fully characterized in the solid state and in solution, including the determination of the molecular structure of four of them by single crystal X-ray diffraction methods. Most compounds showed activity in the low micromolar or submicromolar range against both parasites, with the platinum compounds being more active than the palladium analogues. Activity was significantly increased by generation of the M-dppf compounds (3-24 fold increase with respect to free ligands HL for T. cruzi and up to 99 fold increase with respect to HL for T. brucei). The inclusion of the organometallic co-ligand also led to lower toxicity in mammalian cells and higher selectivity towards both parasites when compared to the free HL compounds. The complexes interact with DNA and affect the redox metabolism of the parasites. Furthermore, the most active and selective compound of the new series showed no in vivo toxicity in zebrafish embryos.
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Affiliation(s)
- Esteban Rodríguez Arce
- Química Inorgánica, Facultad de Química, Universidad de la República, Gral. Flores 2124, 11800 Montevideo, Uruguay.
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16
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Casagrande BP, Gomes MFP, Moura EOC, Santos ACC, Kubota MC, Ribeiro DA, Pisani LP, Medeiros A, Estadella D. Age-dependent hepatic alterations induced by a high-fat high-fructose diet. Inflamm Res 2019; 68:359-368. [PMID: 30874869 DOI: 10.1007/s00011-019-01223-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [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: 01/29/2019] [Revised: 03/01/2019] [Accepted: 03/05/2019] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVE The present study aimed to evaluate and clarify how the age at which the intake of a high-fat and high-fructose diet begins can affect animals' livers. METHODS Thirty-eight male wistar rats aged 6 and 12 weeks were fed a high-fat and high-fructose diet for 13 weeks. Inflammatory cytokines, hepatic glycogen, serum and hepatic triacylglycerol and pAkt protein content in the liver were assessed. Percentage of weight gained, and visceral adiposity were also evaluated. RESULTS Young animal presented increased hepatic triacylglycerol and decreased glycogen, while adult animals had no significant alterations regarding its contents. IL6 and IL10 to IL6 ratio were also altered in young animals exposed to HFHF, while adult animals fed with HFHF had only increases in TNF-α. Both groups which received HFHF had increased serum triacylglycerol and visceral adiposity. However, only young animals gained more relative weight and had greater final body weight, gains which were related to alterations found in hepatic triacylglycerol and glycogen. CONCLUSION Age of which consumption begins interferes in how the liver deals with an excess of nutrient and subsequent proinflammatory stimulation, leading to different phenotypes.
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Affiliation(s)
- B P Casagrande
- Programa de Pós-Graduação Interdisciplinar em Ciências da Saúde, Universidade Federal de São Paulo, Santos, SP, Brazil
| | - M F P Gomes
- Programa de Pós-Graduação Interdisciplinar em Ciências da Saúde, Universidade Federal de São Paulo, Santos, SP, Brazil
| | - E O C Moura
- Programa de Pós-Graduação Interdisciplinar em Ciências da Saúde, Universidade Federal de São Paulo, Santos, SP, Brazil
| | - A C C Santos
- Instituto de Saúde e Sociedade, Universidade Federal de São Paulo, Santos, SP, Brazil
| | - M C Kubota
- Programa de Pós-Graduação Interdisciplinar em Ciências da Saúde, Universidade Federal de São Paulo, Santos, SP, Brazil
| | - D A Ribeiro
- Departamento de Biociências, Instituto de Saúde e Sociedade, Federal University of São Paulo (UNIFESP), 11015-020, Santos, SP, Brazil
| | - L P Pisani
- Departamento de Biociências, Instituto de Saúde e Sociedade, Federal University of São Paulo (UNIFESP), 11015-020, Santos, SP, Brazil
| | - A Medeiros
- Departamento de Biociências, Instituto de Saúde e Sociedade, Federal University of São Paulo (UNIFESP), 11015-020, Santos, SP, Brazil
| | - D Estadella
- Departamento de Biociências, Instituto de Saúde e Sociedade, Federal University of São Paulo (UNIFESP), 11015-020, Santos, SP, Brazil.
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17
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Blanco Rodríguez P, Lozano JC, Vera Tomé F, Prieto C, Medeiros A. Influence of soil conditions on the distribution coefficients of 226Ra in natural soils. Chemosphere 2018; 205:188-193. [PMID: 29698829 DOI: 10.1016/j.chemosphere.2018.04.093] [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] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 03/20/2018] [Accepted: 04/16/2018] [Indexed: 06/08/2023]
Abstract
In order to clarify some of the assumptions and approximations about the use of the distribution coefficient Kd for 226Ra in soils, a systematic study has been performed using centrifugation to extract the soil solution. The separated fractions of the soil solution have different kinetics with respect to the sorption process in the soil, which may in turn condition the final chemical composition and even the speciation of the radionuclides in solution. In the experimental design of this study three factors were considered: the moisture level in the incubation process, incubation time and the speed of centrifugation. Also, three levels were chosen for each factor. In order to analyze the influence of the structural characteristics of the soil, this study was performed with three textural fractions: coarse sand, fine sand, and silt and clay, obtained from an only soil. Also, the soil was naturally enriched with radionuclides of the 238U series. An analysis of variance (ANOVA) was performed in order to assess the influence of the factors studied on the distribution coefficient of 226Ra. The results indicate that different behaviors can be observed depending on the structural characteristic of the soil. In the case of particle size, the soil with the largest grain size showed that the incubation process parameters influence the equilibrium level achieved, while in the case of the smallest edaphic particles, radium is not homogeneously distributed in the soil solution and the Kd value is dependent on the speed of centrifugation.
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Affiliation(s)
- P Blanco Rodríguez
- Natural Radioactivity Group, University of Extremadura, 06071 Badajoz, Spain.
| | - J C Lozano
- Laboratory of Ionizing Radiations, University of Salamanca, 37008 Salamanca, Spain
| | - F Vera Tomé
- Natural Radioactivity Group, University of Extremadura, 06071 Badajoz, Spain
| | - C Prieto
- Laboratory of Ionizing Radiations, University of Salamanca, 37008 Salamanca, Spain
| | - A Medeiros
- CAPES Foundation, Ministry of Education, Brazil
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18
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Graça R, Abrantes L, Rossi N, Alves A, Medeiros A, Zimon M, Rausch T, Benes V, Pepperkok R, Bourbon M. The importance to track variants in a genes causing recessive disorders within the family: A FH/Sitosterolemia clinical case. Atherosclerosis 2018. [DOI: 10.1016/j.atherosclerosis.2018.06.220] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Graça R, Rossi N, Alves A, Medeiros A, Zimon M, Raush T, Benes V, Pepperkok R, Bourbon M. Improving familial dyslipidaemia diagnosis. Atherosclerosis 2018. [DOI: 10.1016/j.atherosclerosis.2018.06.270] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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20
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Rivas F, Medeiros A, Rodríguez Arce E, Comini M, Ribeiro CM, Pavan FR, Gambino D. New heterobimetallic ferrocenyl derivatives: Evaluation of their potential as prospective agents against trypanosomatid parasites and Mycobacterium tuberculosis. J Inorg Biochem 2018; 187:73-84. [PMID: 30055398 DOI: 10.1016/j.jinorgbio.2018.07.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [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: 05/19/2018] [Revised: 06/26/2018] [Accepted: 07/21/2018] [Indexed: 12/21/2022]
Abstract
Searching for prospective agents against infectious diseases, four new ferrocenyl derivatives, [M(L)(dppf)4](PF6), with M = Pd(II) or Pt(II), dppf = 1,1'-bis(dipheny1phosphino) ferrocene and HL = tropolone (HTrop) or hinokitiol (HHino), were synthesized and characterized. Complexes and ligands were evaluated against the bloodstream form of T. brucei, L. infantum amastigotes, M. tuberculosis (MTB) sensitive strain and MTB clinical isolates. Complexes showed a significant increase of the anti-T. brucei activity with respect to the free ligands (>28- and >46-fold for Trop and 6- and 22-fold for Hino coordinated to Pt-dppf and Pd-dppf, respectively), yielding IC50 values < 5 μM. The complexes proved to be more potent than the antitrypanosomal drug Nifurtimox. The new ferrocenyl derivatives were more selective towards the parasite than the free ligands. The Pt compounds were less toxic on J774 murine macrophages (mammalian cell model), than the Pd ones, showing selectivity index values (SI = IC50 murine macrophage/IC50T. brucei) up to 23. Generation of the {M-dppf} compounds lead to a slightly positive impact on the anti-leishmanial potency. Although the ferrocenyl derivatives were more active on sensitive MTB than the free ligands (MIC90 = 9.88-14.73 μM), they showed low selectivity towards the pathogen. Related to the mechanism of action, the antiparasitic effect cannot be ascribed to an interference of the compounds with the thiol-redox homeostasis of the pathogen. Fluorescence measurements pointed at DNA as a probable target of the new compounds. [Pt(Trop)(dppf)](PF6) and [Pt(Hino)(dppf)](PF6) could be considered prospective anti-T. brucei agents that deserve further research.
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Affiliation(s)
- Feriannys Rivas
- Área Química Inorgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Andrea Medeiros
- Group Redox Biology of Trypanosomes, Institut Pasteur Montevideo, Montevideo, Uruguay; Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Esteban Rodríguez Arce
- Área Química Inorgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Marcelo Comini
- Group Redox Biology of Trypanosomes, Institut Pasteur Montevideo, Montevideo, Uruguay
| | | | | | - Dinorah Gambino
- Área Química Inorgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay.
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21
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Franco J, Medeiros A, Benítez D, Perelmuter K, Serra G, Comini MA, Scarone L. In vitro activity and mode of action of distamycin analogues against African trypanosomes. Eur J Med Chem 2016; 126:776-788. [PMID: 27951486 DOI: 10.1016/j.ejmech.2016.12.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [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: 09/17/2016] [Revised: 10/29/2016] [Accepted: 12/01/2016] [Indexed: 12/14/2022]
Abstract
Distamycin, a natural polyamide containing three heterocycle rings with a polar end, has inspired several groups to prepare synthetic analogues, which proved to have anti-trypanosomal and anti-tumoral activity. We describe the synthesis of bi and tri thiazoles amides that harbor different substitutions at their ends and the evaluation of their anti-Trypanosoma brucei activity. The most active compound 10b showed better biological activity (EC50 310 nM and selectivity index 16) than the control drug nifurtimox (EC50 15 μM and selectivity index 10). Studies on the mode of action show that the parasiticidal activity of 10b originates from disruption of lysosomal homeostasis, which is followed by release of redox active iron, an increase in oxidizing species and collapse of cell membrane integrity. In this respect, our study suggests that non-charged lipophylic distamycins destabilize cell membranes.
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Affiliation(s)
- Jaime Franco
- Laboratorio de Química Farmacéutica, Departamento de Química Orgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay; Group Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Andrea Medeiros
- Group Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo, Uruguay; Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Diego Benítez
- Group Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Karen Perelmuter
- Cell Biology Unit, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Gloria Serra
- Laboratorio de Química Farmacéutica, Departamento de Química Orgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Marcelo A Comini
- Group Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo, Uruguay.
| | - Laura Scarone
- Laboratorio de Química Farmacéutica, Departamento de Química Orgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay.
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22
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Ortiz C, Moraca F, Medeiros A, Botta M, Hamilton N, Comini MA. Binding Mode and Selectivity of Steroids towards Glucose-6-phosphate Dehydrogenase from the Pathogen Trypanosoma cruzi. Molecules 2016; 21:368. [PMID: 26999093 PMCID: PMC6273692 DOI: 10.3390/molecules21030368] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 03/08/2016] [Accepted: 03/11/2016] [Indexed: 11/17/2022] Open
Abstract
Glucose-6-phosphate dehydrogenase (G6PDH) plays a housekeeping role in cell metabolism by generating reducing power (NADPH) and fueling the production of nucleotide precursors (ribose-5-phosphate). Based on its indispensability for pathogenic parasites from the genus Trypanosoma, G6PDH is considered a drug target candidate. Several steroid-like scaffolds were previously reported to target the activity of G6PDH. Epiandrosterone (EA) is an uncompetitive inhibitor of trypanosomal G6PDH for which its binding site to the enzyme remains unknown. Molecular simulation studies with the structure of Trypanosoma cruzi G6PDH revealed that EA binds in a pocket close to the G6P binding-site and protrudes into the active site blocking the interaction between substrates and hence catalysis. Site directed mutagenesis revealed the important steroid-stabilizing effect of residues (L80, K83 and K84) located on helix α-1 of T. cruzi G6PDH. The higher affinity and potency of 16α-Br EA by T. cruzi G6PDH is explained by the formation of a halogen bond with the hydrogen from the terminal amide of the NADP+-nicotinamide. At variance with the human enzyme, the inclusion of a 21-hydroxypregnane-20-one moiety to a 3β-substituted steroid is detrimental for T. cruzi G6PDH inhibition. The species-specificity of certain steroid derivatives towards the parasite G6PDH and the corresponding biochemically validated binding models disclosed in this work may prove valuable for the development of selective inhibitors against the pathogen's enzyme.
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Affiliation(s)
- Cecilia Ortiz
- Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Mataojo 2020, Montevideo 11400, Uruguay.
| | - Francesca Moraca
- Dipartimento di Biotecnologie, Chimica e Farmacia, Università degli Studi di Siena, Via Aldo Moro 2, Siena 53100, Italy.
- Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology, Temple University, BioLife Science Building, Suite 333, 1900 N 12th Street, Philadelphia, PA 19122, USA.
| | - Andrea Medeiros
- Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Mataojo 2020, Montevideo 11400, Uruguay.
- Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Av. Gral. Flores 2125, Montevideo 11800, Uruguay.
| | - Maurizio Botta
- Dipartimento di Biotecnologie, Chimica e Farmacia, Università degli Studi di Siena, Via Aldo Moro 2, Siena 53100, Italy.
| | - Niall Hamilton
- Drug Discovery Unit, Cancer Research, UK Manchester Institute, Wilmslow Road, Manchester M204BX, UK.
| | - Marcelo A Comini
- Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Mataojo 2020, Montevideo 11400, Uruguay.
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23
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Alberca LN, Sbaraglini ML, Balcazar D, Fraccaroli L, Carrillo C, Medeiros A, Benitez D, Comini M, Talevi A. Discovery of novel polyamine analogs with anti-protozoal activity by computer guided drug repositioning. J Comput Aided Mol Des 2016; 30:305-21. [PMID: 26891837 DOI: 10.1007/s10822-016-9903-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [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: 11/20/2015] [Accepted: 02/12/2016] [Indexed: 12/01/2022]
Abstract
Chagas disease is a parasitic infection caused by the protozoa Trypanosoma cruzi that affects about 6 million people in Latin America. Despite its sanitary importance, there are currently only two drugs available for treatment: benznidazole and nifurtimox, both exhibiting serious adverse effects and limited efficacy in the chronic stage of the disease. Polyamines are ubiquitous to all living organisms where they participate in multiple basic functions such as biosynthesis of nucleic acids and proteins, proliferation and cell differentiation. T. cruzi is auxotroph for polyamines, which are taken up from the extracellular medium by efficient transporters and, to a large extent, incorporated into trypanothione (bis-glutathionylspermidine), the major redox cosubstrate of trypanosomatids. From a 268-compound database containing polyamine analogs with and without inhibitory effect on T. cruzi we have inferred classificatory models that were later applied in a virtual screening campaign to identify anti-trypanosomal compounds among drugs already used for other therapeutic indications (i.e. computer-guided drug repositioning) compiled in the DrugBank and Sweetlead databases. Five of the candidates identified with this strategy were evaluated in cellular models from different pathogenic trypanosomatids (T. cruzi wt, T. cruzi PAT12, T. brucei and Leishmania infantum), and in vitro models of aminoacid/polyamine transport assays and trypanothione synthetase inhibition assay. Triclabendazole, sertaconazole and paroxetine displayed inhibitory effects on the proliferation of T. cruzi (epimastigotes) and the uptake of putrescine by the parasite. They also interfered with the uptake of others aminoacids and the proliferation of infective T. brucei and L. infantum (promastigotes). Trypanothione synthetase was ruled out as molecular target for the anti-parasitic activity of these compounds.
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Affiliation(s)
- Lucas N Alberca
- Laboratory of Bioactive Compounds Research and Development (LIDeB), Medicinal Chemistry, Department of Biological Science, Exact Sciences College, National University of La Plata (UNLP), Argentina, 47 & 115, B1900AJI, La Plata, Buenos Aires, Argentina
| | - María L Sbaraglini
- Laboratory of Bioactive Compounds Research and Development (LIDeB), Medicinal Chemistry, Department of Biological Science, Exact Sciences College, National University of La Plata (UNLP), Argentina, 47 & 115, B1900AJI, La Plata, Buenos Aires, Argentina
| | - Darío Balcazar
- Instituto de Ciencias y Tecnología Dr. César Milstein (ICT Milstein), Argentinean National Council of Scientific and Technical Research (CONICET), Buenos Aires, Argentina
| | - Laura Fraccaroli
- Instituto de Ciencias y Tecnología Dr. César Milstein (ICT Milstein), Argentinean National Council of Scientific and Technical Research (CONICET), Buenos Aires, Argentina
| | - Carolina Carrillo
- Instituto de Ciencias y Tecnología Dr. César Milstein (ICT Milstein), Argentinean National Council of Scientific and Technical Research (CONICET), Buenos Aires, Argentina
| | - Andrea Medeiros
- Laboratory Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, 11400, Montevideo, Uruguay
| | - Diego Benitez
- Laboratory Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, 11400, Montevideo, Uruguay
| | - Marcelo Comini
- Laboratory Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, 11400, Montevideo, Uruguay
| | - Alan Talevi
- Laboratory of Bioactive Compounds Research and Development (LIDeB), Medicinal Chemistry, Department of Biological Science, Exact Sciences College, National University of La Plata (UNLP), Argentina, 47 & 115, B1900AJI, La Plata, Buenos Aires, Argentina.
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24
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Jamar G, Pisani LP, Medeiros A, Oyama LM, Masquio DCL, Colantonio E, Garcia S, Sanches RB, dos Santos Moraes A, Belote C, Caranti DA. Effect of Fat Intake on the Inflammatory Process and Cardiometabolic Risk in Obesity After Interdisciplinary Therapy. Horm Metab Res 2016; 48:106-11. [PMID: 26372897 DOI: 10.1055/s-0035-1548871] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Changes in diet and eating behavior along with excessive consumption of sugar or fat and a sedentary lifestyle are related to increased obesity and its associated comorbidities. The aim of this study was to investigate the role of the type of macronutrients on specific health benefits associated with the weight loss in treating obesity. A total of 30 obese women (34.89±3.04 kg/m(2) and 43.3±5.34 years) participated in an interdisciplinary therapy approach to lifestyle change, which consisted of nutritional counseling, exercise, and psychological therapy for over a period of 26 weeks. The profile was obtained by anthropometric measurements and body composition by bioelectrical impedance analysis (BIA). Usual food intake was assessed with 3-day food record diaries and blood tests were used to determine metabolic and adipokines parameters. After therapy, there was significant reduction in all anthropometric and body composition variables. Food consumption also decreased while still providing adequate nutrient intake. There was significant improvement in LDL-cholesterol, PAI-1, leptin, CRP, ICAM-1, and VCAM-1. Lower dietary carbohydrate and fat intake led to weight loss. The effect of lower carbohydrate intake on weight loss is related to changes in body composition and leptin levels. Weight loss by reducing fat intake modified the inflammatory process and cardiovascular risk, indicating dietary fat as an independent predictor factor of cell adhesion molecules. Therefore, decreasing dietary fat consumption had greater impact on the inflammatory process on obese individuals. Our results show that the type of macronutrient influences the health benefits associated with weight loss.
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Affiliation(s)
- G Jamar
- Post Graduate Program of Interdisciplinary Health Sciences, Federal University of São Paulo - UNIFESP - Santos, São Paulo, Brazil
| | - L P Pisani
- Post Graduate Program of Interdisciplinary Health Sciences, Federal University of São Paulo - UNIFESP - Santos, São Paulo, Brazil
| | - A Medeiros
- Post Graduate Program of Interdisciplinary Health Sciences, Federal University of São Paulo - UNIFESP - Santos, São Paulo, Brazil
| | - L M Oyama
- Post Graduate Program of Nutrition, Federal University of São Paulo - UNIFESP - Santos, São Paulo, Brazil
| | - D C L Masquio
- Post Graduate Program of Interdisciplinary Health Sciences, Federal University of São Paulo - UNIFESP - Santos, São Paulo, Brazil
| | - E Colantonio
- Obesity Study Group (GEO), Federal University of São Paulo - UNIFESP - Santos, São Paulo, Brazil
| | - S Garcia
- Post Graduate Program of Interdisciplinary Health Sciences, Federal University of São Paulo - UNIFESP - Santos, São Paulo, Brazil
| | - R B Sanches
- Post Graduate Program of Interdisciplinary Health Sciences, Federal University of São Paulo - UNIFESP - Santos, São Paulo, Brazil
| | - A dos Santos Moraes
- Post Graduate Program of Interdisciplinary Health Sciences, Federal University of São Paulo - UNIFESP - Santos, São Paulo, Brazil
| | - C Belote
- Obesity Study Group (GEO), Federal University of São Paulo - UNIFESP - Santos, São Paulo, Brazil
| | - D A Caranti
- Post Graduate Program of Interdisciplinary Health Sciences, Federal University of São Paulo - UNIFESP - Santos, São Paulo, Brazil
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25
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Ubillos L, Freire T, Berriel E, Chiribao ML, Chiale C, Festari MF, Medeiros A, Mazal D, Rondán M, Bollati-Fogolín M, Rabinovich GA, Robello C, Osinaga E. Trypanosoma cruzi extracts elicit protective immune response against chemically induced colon and mammary cancers. Int J Cancer 2015; 138:1719-31. [PMID: 26519949 DOI: 10.1002/ijc.29910] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [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: 07/22/2015] [Revised: 09/16/2015] [Accepted: 10/19/2015] [Indexed: 12/26/2022]
Abstract
Trypanosoma cruzi, the protozoan parasite that causes Chagas' disease, has anticancer effects mediated, at least in part, by parasite-derived products which inhibit growth of tumor cells. We investigated whether immunity to T. cruzi antigens could induce antitumor activity, using two rat models which reproduce human carcinogenesis: colon cancer induced by 1,2-dimethylhydrazine (DMH), and mammary cancer induced by N-nitroso-N-methylurea (NMU). We found that vaccination with T. cruzi epimastigote lysates strongly inhibits tumor development in both animal models. Rats immunized with T. cruzi antigens induce activation of both CD4(+) and CD8(+) T cells and splenocytes from these animals showed higher cytotoxic responses against tumors as compared to rats receiving adjuvant alone. Tumor-associated immune responses included increasing number of CD11b/c(+) His48(-) MHC II(+) cells corresponding to macrophages and/or dendritic cells, which exhibited augmented NADPH-oxidase activity. We also found that T. cruzi lysate vaccination developed antibodies specific for colon and mammary rat cancer cells, which were capable of mediating antibody-dependent cellular cytotoxicity (ADCC) in vitro. Anti-T. cruzi antibodies cross-reacted with human colon and breast cancer cell lines and recognized 41/60 (68%) colon cancer and 38/63 (60%) breast cancer samples in a series of 123 human tumors. Our results suggest that T. cruzi antigens can evoke an integrated antitumor response involving both the cellular and humoral components of the immune response and provide novel insights into the understanding of the intricate relationship between parasite infection and tumor growth.
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Affiliation(s)
- Luis Ubillos
- Departamento de Inmunobiología, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay.,Servicio de Oncología Clínica, Hospital de Clínicas, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Teresa Freire
- Departamento de Inmunobiología, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Edgardo Berriel
- Laboratorio de Glicobiología e Inmunología Tumoral, Institut Pasteur de Montevideo, Uruguay.,Clínica Quirúrgica 1, Hospital Pasteur, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - María Laura Chiribao
- Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay.,Unidad de Biología Molecular, Institut Pasteur de Montevideo, Uruguay
| | - Carolina Chiale
- Departamento de Inmunobiología, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - María Florencia Festari
- Departamento de Inmunobiología, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay.,Laboratorio de Glicobiología e Inmunología Tumoral, Institut Pasteur de Montevideo, Uruguay
| | - Andrea Medeiros
- Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Daniel Mazal
- Servicio de Anatomía Patológica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Mariella Rondán
- Servicio de Anatomía Patológica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | | | - Gabriel A Rabinovich
- Laboratorio de Inmunopatología, Instituto de Biología y Medicina Experimental (IBYME), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Carlos Robello
- Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay.,Unidad de Biología Molecular, Institut Pasteur de Montevideo, Uruguay
| | - Eduardo Osinaga
- Departamento de Inmunobiología, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay.,Laboratorio de Glicobiología e Inmunología Tumoral, Institut Pasteur de Montevideo, Uruguay
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Rodríguez Arce E, Sarniguet C, Moraes TS, Vieites M, Tomaz AI, Medeiros A, Comini MA, Varela J, Cerecetto H, González M, Marques F, García MH, Otero L, Gambino D. A new ruthenium cyclopentadienyl azole compound with activity on tumor cell lines and trypanosomatid parasites. J COORD CHEM 2015. [DOI: 10.1080/00958972.2015.1062480] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Esteban Rodríguez Arce
- Facultad de Química, Departamento Estrella Campos, Cátedra de Química Inorgánica, Universidad de la República, Montevideo, Uruguay
| | - Cynthia Sarniguet
- Facultad de Química, Departamento Estrella Campos, Cátedra de Química Inorgánica, Universidad de la República, Montevideo, Uruguay
| | - Tania S. Moraes
- Faculdade de Ciências da, Universidade de Lisboa, CCMM, Lisbon, Portugal
| | - Marisol Vieites
- Facultad de Química, Departamento Estrella Campos, Cátedra de Química Inorgánica, Universidad de la República, Montevideo, Uruguay
| | - A. Isabel Tomaz
- Faculdade de Ciências da, Universidade de Lisboa, CCMM, Lisbon, Portugal
| | - Andrea Medeiros
- Group Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo, Uruguay
- Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Marcelo A. Comini
- Group Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Javier Varela
- Facultad de Ciencias, Grupo de Química Medicinal, Laboratorio de Química Orgánica, Universidad de la República, Montevideo, Uruguay
| | - Hugo Cerecetto
- Facultad de Ciencias, Grupo de Química Medicinal, Laboratorio de Química Orgánica, Universidad de la República, Montevideo, Uruguay
| | - Mercedes González
- Facultad de Ciencias, Grupo de Química Medicinal, Laboratorio de Química Orgánica, Universidad de la República, Montevideo, Uruguay
| | - Fernanda Marques
- Centro de Ciências e Tecnologias Nucleares (C2TN), Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - M. Helena García
- Faculdade de Ciências da, Universidade de Lisboa, CCMM, Lisbon, Portugal
| | - Lucía Otero
- Facultad de Química, Departamento Estrella Campos, Cátedra de Química Inorgánica, Universidad de la República, Montevideo, Uruguay
| | - Dinorah Gambino
- Facultad de Química, Departamento Estrella Campos, Cátedra de Química Inorgánica, Universidad de la República, Montevideo, Uruguay
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Fernández M, Arce ER, Sarniguet C, Morais TS, Tomaz AI, Azar CO, Figueroa R, Diego Maya J, Medeiros A, Comini M, Helena Garcia M, Otero L, Gambino D. Novel ruthenium(II) cyclopentadienyl thiosemicarbazone compounds with antiproliferative activity on pathogenic trypanosomatid parasites. J Inorg Biochem 2015; 153:306-314. [PMID: 26275470 DOI: 10.1016/j.jinorgbio.2015.06.018] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 06/22/2015] [Accepted: 06/24/2015] [Indexed: 10/23/2022]
Abstract
Searching for new prospective antitrypanosomal agents, three novel Ru(II)-cyclopentadienyl compounds, [Ru(η(5)-C5H5)(PPh3)L], with HL=bioactive 5-nitrofuryl containing thiosemicarbazones were synthesized and characterized in the solid state and in solution. The compounds were evaluated in vitro on the blood circulating trypomastigote form of Trypanosoma cruzi (Dm28c strain), the infective form of Trypanosoma brucei brucei (strain 427) and on J774 murine macrophages and human-derived EA.hy926 endothelial cells. The compounds were active against both parasites with IC50 values in the micromolar or submicromolar range. Interestingly, they are much more active on T. cruzi than previously developed Ru(II) classical and organometallic compounds with the same bioactive ligands. The new compounds showed moderate to very good selectivity towards the parasites in respect to mammalian cells. The global results point at [RuCp(PPh3)L2] (L2=N-methyl derivative of 5-nitrofuryl containing thiosemicarbazone and Cp=cyclopentadienyl) as the most promising compound for further developments (IC50T. cruzi=0.41μM; IC50T. brucei brucei=3.5μM). Moreover, this compound shows excellent selectivity towards T. cruzi (SI>49) and good selectivity towards T. brucei brucei (SI>6). In order to get insight into the mechanism of antiparasitic action, the intracellular free radical production capacity of the new compounds was assessed by ESR. DMPO (5,5-dimethyl-1-pirroline-N-oxide) spin adducts related to the bioreduction of the complexes and to redox cycling processes were characterized. In addition, DNA competitive binding studies with ethidium bromide by fluorescence measurements showed that the compounds interact with this biomolecule.
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Affiliation(s)
- Mariana Fernández
- Cátedra de Química Inorgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Esteban Rodríguez Arce
- Cátedra de Química Inorgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Cynthia Sarniguet
- Cátedra de Química Inorgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Tânia S Morais
- Centro de Química Estrutural, Faculdade de Ciências da Universidade de Lisboa, Portugal
| | - Ana Isabel Tomaz
- Centro de Química Estrutural, Faculdade de Ciências da Universidade de Lisboa, Portugal
| | - Claudio Olea Azar
- Departamento de Química Inorgánica y Analítica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, Chile
| | - Roberto Figueroa
- Departamento de Química Inorgánica y Analítica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, Chile
| | - J Diego Maya
- Programa de Farmacología Molecular y Clínica, ICBM, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Andrea Medeiros
- Institut Pasteur de Montevideo, Group Redox Biology of Trypanosomes, Montevideo, Uruguay; Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Marcelo Comini
- Institut Pasteur de Montevideo, Group Redox Biology of Trypanosomes, Montevideo, Uruguay
| | - M Helena Garcia
- Centro de Química Estrutural, Faculdade de Ciências da Universidade de Lisboa, Portugal
| | - Lucía Otero
- Cátedra de Química Inorgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay.
| | - Dinorah Gambino
- Cátedra de Química Inorgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay.
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Medeiros A, Alves A, Aguiar P, Bourbon M. Apob/apoa1 ratio improves clinical criteria sensitivity for the identification of fh children. Atherosclerosis 2014. [DOI: 10.1016/j.atherosclerosis.2014.05.160] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Peña S, Fagundez C, Medeiros A, Comini M, Scarone L, Sellanes D, Manta E, Tulla-Puche J, Albericio F, Stewart L, Yardley V, Serra G. Synthesis of cyclohexapeptides as antimalarial and anti-trypanosomal agents. Med Chem Commun 2014. [DOI: 10.1039/c4md00135d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Azolic and non-azolic cyclohexapeptides were obtained and/or evaluated as promising antimalarial and/or anti-trypanosomal agents.
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Affiliation(s)
- S. Peña
- Cátedra de Química Farmacéutica
- (DQO)
- Facultad de Química
- Universidad de la República
- Montevideo, Uruguay
| | - C. Fagundez
- Cátedra de Química Farmacéutica
- (DQO)
- Facultad de Química
- Universidad de la República
- Montevideo, Uruguay
| | - A. Medeiros
- Group Redox Biology of Trypanosomes
- Institut Pasteur de Montevideo
- Montevideo, Uruguay
- Departamento de Bioquímica
- Facultad de Medicina
| | - M. Comini
- Group Redox Biology of Trypanosomes
- Institut Pasteur de Montevideo
- Montevideo, Uruguay
| | - L. Scarone
- Cátedra de Química Farmacéutica
- (DQO)
- Facultad de Química
- Universidad de la República
- Montevideo, Uruguay
| | - D. Sellanes
- Cátedra de Química Farmacéutica
- (DQO)
- Facultad de Química
- Universidad de la República
- Montevideo, Uruguay
| | - E. Manta
- Cátedra de Química Farmacéutica
- (DQO)
- Facultad de Química
- Universidad de la República
- Montevideo, Uruguay
| | - J. Tulla-Puche
- Institute for Research in Biomedicine (IRB Barcelona)
- 08028-Barcelona, Spain
- Centre on Bioengineering
- Biomaterials and Nanomedicine
- Barcelona Science Park
| | - F. Albericio
- Institute for Research in Biomedicine (IRB Barcelona)
- 08028-Barcelona, Spain
- Centre on Bioengineering
- Biomaterials and Nanomedicine
- Barcelona Science Park
| | - L. Stewart
- Faculty of Infectious & Tropical Disease
- LSHTM
- London, UK
| | - V. Yardley
- Faculty of Infectious & Tropical Disease
- LSHTM
- London, UK
| | - G. Serra
- Cátedra de Química Farmacéutica
- (DQO)
- Facultad de Química
- Universidad de la República
- Montevideo, Uruguay
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Fernández M, Becco L, Correia I, Benítez J, Piro OE, Echeverria GA, Medeiros A, Comini M, Lavaggi ML, González M, Cerecetto H, Moreno V, Pessoa JC, Garat B, Gambino D. Oxidovanadium(IV) and dioxidovanadium(V) complexes of tridentate salicylaldehyde semicarbazones: Searching for prospective antitrypanosomal agents. J Inorg Biochem 2013; 127:150-60. [DOI: 10.1016/j.jinorgbio.2013.02.010] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Revised: 02/20/2013] [Accepted: 02/20/2013] [Indexed: 12/29/2022]
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Manta B, Pavan C, Sturlese M, Medeiros A, Crispo M, Berndt C, Krauth-Siegel RL, Bellanda M, Comini MA. Iron-sulfur cluster binding by mitochondrial monothiol glutaredoxin-1 of Trypanosoma brucei: molecular basis of iron-sulfur cluster coordination and relevance for parasite infectivity. Antioxid Redox Signal 2013; 19:665-82. [PMID: 23259530 PMCID: PMC3739951 DOI: 10.1089/ars.2012.4859] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
AIMS Monothiol glutaredoxins (1-C-Grxs) are small proteins linked to the cellular iron and redox metabolism. Trypanosoma brucei brucei, model organism for human African trypanosomiasis, expresses three 1-C-Grxs. 1-C-Grx1 is a highly abundant mitochondrial protein capable to bind an iron-sulfur cluster (ISC) in vitro using glutathione (GSH) as cofactor. We here report on the functional and structural analysis of 1-C-Grx1 in relation to its ISC-binding properties. RESULTS An N-terminal extension unique to 1-C-Grx1 from trypanosomatids affects the oligomeric structure and the ISC-binding capacity of the protein. The active-site Cys104 is essential for ISC binding, and the parasite-specific glutathionylspermidine and trypanothione can replace GSH as the ligands of the ISC. Interestingly, trypanothione forms stable protein-free ISC species that in vitro are incorporated into the dithiol T. brucei 2-C-Grx1, but not 1-C-Grx1. Overexpression of the C104S mutant of 1-C-Grx1 impairs disease progression in a mouse model. The structure of the Grx-domain of 1-C-Grx1 was solved by nuclear magnetic resonance spectroscopy. Despite the fact that several residues--which in other 1-C-Grxs are involved in the noncovalent binding of GSH--are conserved, different physicochemical approaches did not reveal any specific interaction between 1-C-Grx1 and free thiol ligands. INNOVATION Parasite Grxs are able to coordinate an ISC formed with trypanothione, suggesting a new mechanism of ISC binding and a novel function for the parasite-specific dithiol. The first 3D structure and in vivo relevance of a 1-C-Grx from a pathogenic protozoan are reported. CONCLUSION T. brucei 1-C-Grx1 is indispensable for mammalian parasitism and utilizes a new mechanism for ISC binding.
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Affiliation(s)
- Bruno Manta
- Laboratory Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo, Uruguay
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Jamar G, Pisani L, Sanches R, Carvalho L, Moraes A, Medeiros A, Oyama L, Caranti D. PP234-MON SHORT-TERM INTERDISCIPLINARY THERAPY PROMOTES IMPROVEMENT IN FOOD INTAKE AND METABOLIC PROFILE IN OBESE WOMEN. Clin Nutr 2013. [DOI: 10.1016/s0261-5614(13)60544-0] [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: 10/26/2022]
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33
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Mazal D, Lo-Man R, Bay S, Pritsch O, Dériaud E, Ganneau C, Medeiros A, Ubillos L, Obal G, Berois N, Bollati-Fogolin M, Leclerc C, Osinaga E. Monoclonal antibodies toward different Tn-amino acid backbones display distinct recognition patterns on human cancer cells. Implications for effective immuno-targeting of cancer. Cancer Immunol Immunother 2013; 62:1107-22. [PMID: 23604173 PMCID: PMC11029704 DOI: 10.1007/s00262-013-1425-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [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: 11/02/2012] [Accepted: 03/31/2013] [Indexed: 02/06/2023]
Abstract
The Tn antigen (GalNAcα-O-Ser/Thr) is a well-established tumor-associated marker which represents a good target for the design of anti-tumor vaccines. Several studies have established that the binding of some anti-Tn antibodies could be affected by the density of Tn determinant or/and by the amino acid residues neighboring O-glycosylation sites. In the present study, using synthetic Tn-based vaccines, we have generated a panel of anti-Tn monoclonal antibodies. Analysis of their binding to various synthetic glycopeptides, modifying the amino acid carrier of the GalNAc(*) (Ser* vs Thr*), showed subtle differences in their fine specificities. We found that the recognition of these glycopeptides by some of these MAbs was strongly affected by the Tn backbone, such as a S*S*S* specific MAb (15G9) which failed to recognize a S*T*T* or a T*T*T* structure. Different binding patterns of these antibodies were also observed in FACS and Western blot analysis using three human cancer cell lines (MCF-7, LS174T and Jurkat). Importantly, an immunohistochemical analysis of human tumors (72 breast cancer and 44 colon cancer) showed the existence of different recognition profiles among the five antibodies evaluated, demonstrating that the aglyconic part of the Tn structure (Ser vs Thr) plays a key role in the anti-Tn specificity for breast and colon cancer detection. This new structural feature of the Tn antigen could be of important clinical value, notably due to the increasing interest of this antigen in anticancer vaccine design as well as for the development of anti-Tn antibodies for in vivo diagnostic and therapeutic strategies.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Amino Acid Sequence
- Animals
- Antibodies, Monoclonal/immunology
- Antibodies, Monoclonal/metabolism
- Antibody Specificity/immunology
- Antigens, Tumor-Associated, Carbohydrate/chemistry
- Antigens, Tumor-Associated, Carbohydrate/immunology
- Antigens, Tumor-Associated, Carbohydrate/metabolism
- Biomarkers, Tumor
- Breast Neoplasms/immunology
- Breast Neoplasms/metabolism
- Breast Neoplasms/pathology
- Cell Line, Tumor
- Colonic Neoplasms/immunology
- Colonic Neoplasms/metabolism
- Colonic Neoplasms/pathology
- Female
- Glycopeptides/chemistry
- Glycopeptides/immunology
- Glycopeptides/metabolism
- Humans
- Male
- Mice
- Middle Aged
- Neoplasm Staging
- Neoplasms/immunology
- Neoplasms/metabolism
- Neoplasms/pathology
- Protein Binding/immunology
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Affiliation(s)
- Daniel Mazal
- Departamento de Anatomía Patológica y Citología del Hospital de la Mujer, Centro Hospitalario Pereira Rossell, Montevideo, Uruguay
| | - Richard Lo-Man
- Unité de Régulation Immunitaire et Vaccinologie, Institut Pasteur, Paris, France
- Institut National de la Santé et de la Recherche Médicale, U1041 Paris, France
| | - Sylvie Bay
- Unité de Chimie des Biomolécules, Institut Pasteur, Paris, France
- Centre National de la Recherche Scientifique UMR 3523, Paris, France
| | - Otto Pritsch
- Departamento de Inmunobiologia, Facultad de Medicina, Universidad de la República, Avda Gral Flores 2125, 11800 Montevideo, Uruguay
- Unidad de Biofísica de Proteínas, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Edith Dériaud
- Unité de Régulation Immunitaire et Vaccinologie, Institut Pasteur, Paris, France
- Institut National de la Santé et de la Recherche Médicale, U1041 Paris, France
| | - Christelle Ganneau
- Unité de Chimie des Biomolécules, Institut Pasteur, Paris, France
- Centre National de la Recherche Scientifique UMR 3523, Paris, France
| | - Andrea Medeiros
- Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Luis Ubillos
- Departamento de Inmunobiologia, Facultad de Medicina, Universidad de la República, Avda Gral Flores 2125, 11800 Montevideo, Uruguay
| | - Gonzalo Obal
- Departamento de Inmunobiologia, Facultad de Medicina, Universidad de la República, Avda Gral Flores 2125, 11800 Montevideo, Uruguay
- Unidad de Biofísica de Proteínas, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Nora Berois
- Laboratorio de Glicobiología e Inmunología Tumoral, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | | | - Claude Leclerc
- Unité de Régulation Immunitaire et Vaccinologie, Institut Pasteur, Paris, France
- Institut National de la Santé et de la Recherche Médicale, U1041 Paris, France
| | - Eduardo Osinaga
- Departamento de Inmunobiologia, Facultad de Medicina, Universidad de la República, Avda Gral Flores 2125, 11800 Montevideo, Uruguay
- Laboratorio de Glicobiología e Inmunología Tumoral, Institut Pasteur de Montevideo, Montevideo, Uruguay
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Medeiros A, Berois N, Incerti M, Bay S, Franco Fraguas L, Osinaga E. A Tn antigen binding lectin from Myrsine coriacea displays toxicity in human cancer cell lines. J Nat Med 2012; 67:247-54. [PMID: 22645079 DOI: 10.1007/s11418-012-0671-x] [Citation(s) in RCA: 5] [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: 12/13/2011] [Accepted: 04/11/2012] [Indexed: 02/06/2023]
Abstract
The Tn antigen (GalNAc-O-Ser/Thr) is one of the most specific human cancer-associated structures. In the present study we characterize the biochemical and functional properties of the Myrsine coriacea lectin (McL). We show that McL is an unusual high molecular weight highly glycosylated protein, which displays a strong Tn binding activity. The lectin exhibits in vitro inhibition of proliferation in the six cancer cell lines evaluated, in a dose-dependent manner (the strongest activity being against HT-29 and HeLa cells), whereas it does not exhibit toxicity against normal lymphocytes. McL could be exploited in the design of potential new tools for the diagnosis or treatment of cancer.
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Affiliation(s)
- Andrea Medeiros
- Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Av. Gral. Flores 2125, 11800, Montevideo, Uruguay
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Cravo A, Pereira C, Gomes T, Cardoso C, Serafim A, Almeida C, Rocha T, Lopes B, Company R, Medeiros A, Norberto R, Pereira R, Araújo O, Bebianno MJ. A multibiomarker approach in the clam Ruditapes decussatus to assess the impact of pollution in the Ria Formosa lagoon, South Coast of Portugal. Mar Environ Res 2012; 75:23-34. [PMID: 22001190 DOI: 10.1016/j.marenvres.2011.09.012] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2011] [Revised: 09/22/2011] [Accepted: 09/23/2011] [Indexed: 05/31/2023]
Abstract
The Ria Formosa lagoon is an ecosystem whose water quality reflects the anthropogenic influence upon the surrounding areas. In this lagoon, the clam Ruditapes decussatus has a great economical importance and has been widely used as a biomonitor. A multibiomarker approach (δ-aminolevulinic acid dehydratase, metallothionein, lipid peroxidation, acetylcholinesterase, alkali-labile phosphates, DNA damage) was applied to assess the environmental quality of this ecosystem and the accumulation of contaminants and their potential adverse effects on clams. Clams were sampled in different shellfish beds in the period between July 2007 and December 2008 and abiotic parameters (temperature, salinity, pH and dissolved oxygen of seawater and organic matter in the sediment), condition index, metals (Cd, Cu, Zn, Ni, Pb), TBTs and PAHs concentrations were measured in clam tissues. Data was integrated using Principal Component Analyses and biomarker indices: IBR (Integrated Biomarker Response) and HSI (Health Status Index). This multibiomarker approach enabled discrimination of a time and space trend between sites with different degrees of anthropogenic contamination, identifying one of them (site 2) as the most stressful and summer months as the most critical period for clams due to an increase of environmental stress (anthropogenic pressure along with extreme environmental conditions, e.g. temperature, dissolved oxygen, organic matter in the sediments, etc). The selected biomarkers provided an integrated response to assess the environmental quality of the system, proving to be a useful approach when complex mixtures of contaminants occur.
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Affiliation(s)
- A Cravo
- CIMA-Centre for Marine and Environmental Research, Faculty of Sciences and Technology (FCT), University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
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Demoro B, Sarniguet C, Sánchez-Delgado R, Rossi M, Liebowitz D, Caruso F, Olea-Azar C, Moreno V, Medeiros A, Comini MA, Otero L, Gambino D. New organoruthenium complexes with bioactive thiosemicarbazones as co-ligands: potential anti-trypanosomal agents. Dalton Trans 2012; 41:1534-43. [PMID: 22138896 PMCID: PMC3299570 DOI: 10.1039/c1dt11519g] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [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: 11/21/2022]
Abstract
In the search for new therapeutic tools against neglected diseases produced by trypanosomatid parasites, and particularly against African Trypanosomiasis, whose etiological agent is Trypanosoma brucei, organoruthenium compounds with bioactive nitrofuran containing thiosemicarbazones (L) as co-ligands were obtained. Four ruthenium(II) complexes with the formula [Ru(2)(p-cymene)(2)(L)(2)]X(2), where X = Cl or PF(6), were synthesized and the crystal structures of two of them were solved by X-ray diffraction methods. Two of the complexes show significant in vitro growth inhibition activity against Trypanosoma brucei brucei and are highly selective towards trypanosomal cells with respect to mammalian cells (J774 murine macrophages). These promising results make the title organoruthenium compounds good lead candidates for further developments towards potential antitrypanosomal organometallic drugs.
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Affiliation(s)
- Bruno Demoro
- Departamento Estrella Campos, Facultad de Química, Universidad de la Repúublica (UdelaR), Gral. Flores 2124, 11800, Montevideo, Uruguay
| | - Cynthia Sarniguet
- Departamento Estrella Campos, Facultad de Química, Universidad de la Repúublica (UdelaR), Gral. Flores 2124, 11800, Montevideo, Uruguay
| | - Roberto Sánchez-Delgado
- Chemistry Department, Brooklyn College and The Graduate Center, The City University of New York, Brooklyn, New York, 11210, USA
| | - Miriam Rossi
- Department of Chemistry, Vassar College, Poughkeepsie, New York, 12604-0484, USA
| | - Daniel Liebowitz
- Department of Chemistry, Vassar College, Poughkeepsie, New York, 12604-0484, USA
| | - Francesco Caruso
- Istituto di Chimica Biomolecolare, Consiglio Nazionale delle Ricerche, c/o Università di Roma La Sapienza, Vecchio Istituto Chimico, P.le Aldo Moro 5, 00185, Rome, Italy
| | - Claudio Olea-Azar
- Departamento de Química Inorgánica y Analítica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Casilla, 233, Santiago, Chile
| | - Virtudes Moreno
- Departamento de Química Inorganica, Universitat Barcelona, Martí i Franquès 1-11, 08028, Barcelona, Spain
| | - Andrea Medeiros
- Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
- Group Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Mataojo 2020, CP 11400, Montevideo, Uruguay
| | - Marcelo A. Comini
- Group Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Mataojo 2020, CP 11400, Montevideo, Uruguay
| | - Lucía Otero
- Departamento Estrella Campos, Facultad de Química, Universidad de la Repúublica (UdelaR), Gral. Flores 2124, 11800, Montevideo, Uruguay
| | - Dinorah Gambino
- Departamento Estrella Campos, Facultad de Química, Universidad de la Repúublica (UdelaR), Gral. Flores 2124, 11800, Montevideo, Uruguay
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Peña S, Scarone L, Medeiros A, Manta E, Comini M, Serra G. Synthesis of precursors and macrocycle analogs of aerucyclamides as anti-trypanosomal agents. Med Chem Commun 2012. [DOI: 10.1039/c2md20218b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Macrocycle analogs and key fragments of aerucyclamides were obtained and evaluated against Trypanosoma brucei brucei.
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Affiliation(s)
- Stella Peña
- Cátedra de Química Farmacéutica
- (DQO)
- Facultad de Química
- Universidad de la República
- Montevideo
| | - Laura Scarone
- Cátedra de Química Farmacéutica
- (DQO)
- Facultad de Química
- Universidad de la República
- Montevideo
| | - Andrea Medeiros
- Group Redox Biology of Trypanosomes
- Institut Pasteur de Montevideo
- Montevideo
- Uruguay
- Departamento de Bioquímica
| | - Eduardo Manta
- Cátedra de Química Farmacéutica
- (DQO)
- Facultad de Química
- Universidad de la República
- Montevideo
| | - Marcelo Comini
- Group Redox Biology of Trypanosomes
- Institut Pasteur de Montevideo
- Montevideo
- Uruguay
| | - Gloria Serra
- Cátedra de Química Farmacéutica
- (DQO)
- Facultad de Química
- Universidad de la República
- Montevideo
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Ortíz C, Larrieux N, Medeiros A, Botti H, Comini M, Buschiazzo A. Expression, crystallization and preliminary X-ray crystallographic analysis of glucose-6-phosphate dehydrogenase from the human pathogen Trypanosoma cruzi in complex with substrate. Acta Crystallogr Sect F Struct Biol Cryst Commun 2011; 67:1457-61. [PMID: 22102256 PMCID: PMC3212475 DOI: 10.1107/s1744309111037821] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [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: 07/26/2011] [Accepted: 09/16/2011] [Indexed: 11/10/2022]
Abstract
An N-terminally truncated version of the enzyme glucose-6-phosphate dehydrogenase from Trypanosoma cruzi lacking the first 37 residues was crystallized both in its apo form and in a binary complex with glucose 6-phosphate. The crystals both belonged to space group P2(1) and diffracted to 2.85 and 3.35 Å resolution, respectively. Self-rotation function maps were consistent with point group 222. The structure was solved by molecular replacement, confirming a tetrameric quaternary structure.
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Affiliation(s)
- Cecilia Ortíz
- Redox Biology of Trypanosomes Laboratory, Institut Pasteur de Montevideo, Mataojo 2020, 11400 Montevideo, Uruguay
| | - Nicole Larrieux
- Unit of Protein Crystallography, Institut Pasteur de Montevideo, Mataojo 2020, 11400 Montevideo, Uruguay
| | - Andrea Medeiros
- Redox Biology of Trypanosomes Laboratory, Institut Pasteur de Montevideo, Mataojo 2020, 11400 Montevideo, Uruguay
- Biochemistry Department, Universidad de la República, Avenida General Flores 2125, 11800 Montevideo, Uruguay
| | - Horacio Botti
- Unit of Protein Crystallography, Institut Pasteur de Montevideo, Mataojo 2020, 11400 Montevideo, Uruguay
| | - Marcelo Comini
- Redox Biology of Trypanosomes Laboratory, Institut Pasteur de Montevideo, Mataojo 2020, 11400 Montevideo, Uruguay
| | - Alejandro Buschiazzo
- Unit of Protein Crystallography, Institut Pasteur de Montevideo, Mataojo 2020, 11400 Montevideo, Uruguay
- Department of Structural Biology and Chemistry, Institut Pasteur, 25 Rue du Dr Roux, 75015 Paris, France
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Brum P, Bacurau A, Medeiros A, Ferreira J, Vanzelli A, Negrão C. Aerobic exercise training in heart failure: impact on sympathetic hyperactivity and cardiac and skeletal muscle function. Braz J Med Biol Res 2011; 44:827-35. [DOI: 10.1590/s0100-879x2011007500075] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2011] [Accepted: 06/06/2011] [Indexed: 01/01/2023] Open
Affiliation(s)
| | | | - A. Medeiros
- Universidade de São Paulo, Brasil; Universidade Federal de São Paulo, Brasil
| | | | | | - C.E. Negrão
- Universidade de São Paulo, Brasil; Universidade de São Paulo, Brasil
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40
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Ortíz C, Botti H, Larrieux N, Medeiros A, Buschiazzo A, Comini MA. Preliminary studies on glucose-6-phosphate dehydrogenase from Trypanosoma cruzi. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311092579] [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: 11/11/2022] Open
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41
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Dattilo M, Antunes HKM, Medeiros A, Mônico Neto M, Souza HS, Tufik S, de Mello MT. Sleep and muscle recovery: endocrinological and molecular basis for a new and promising hypothesis. Med Hypotheses 2011; 77:220-2. [PMID: 21550729 DOI: 10.1016/j.mehy.2011.04.017] [Citation(s) in RCA: 132] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2010] [Accepted: 04/10/2011] [Indexed: 12/21/2022]
Abstract
Sleep is essential for the cellular, organic and systemic functions of an organism, with its absence being potentially harmful to health and changing feeding behavior, glucose regulation, blood pressure, cognitive processes and some hormonal axes. Among the hormonal changes, there is an increase in cortisol (humans) and corticosterone (rats) secretion, and a reduction in testosterone and Insulin-like Growth Factor 1, favoring the establishment of a highly proteolytic environment. Consequently, we hypothesized that sleep debt decreases the activity of protein synthesis pathways and increases the activity of degradation pathways, favoring the loss of muscle mass and thus hindering muscle recovery after damage induced by exercise, injuries and certain conditions associated with muscle atrophy, such as sarcopenia and cachexia.
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Affiliation(s)
- M Dattilo
- Centro de Estudos em Psicobiologia e Exercício, São Paulo, Brazil
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42
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Meliski GA, Monterio LZ, Maman D, Medeiros A, Giglio CA. Association between breath type and postural changes in elite swimmers of Brazil. Br J Sports Med 2010. [DOI: 10.1136/bjsm.2010.078972.25] [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: 11/04/2022]
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43
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Medeiros A, Mesquita I, Oliveira J, Loureiro ACC, Afonso J, Monteiro LZ, Castro JM. Body composition of Brazilian beach volleyball players. Br J Sports Med 2010. [DOI: 10.1136/bjsm.2010.078972.51] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Meliscki GA, Monterio LZ, Maman D, Medeiros A, Giglico CA. Postural assessment and joint instability in athletes of federated Brazilian swimmers. Br J Sports Med 2010. [DOI: 10.1136/bjsm.2010.078972.13] [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: 11/03/2022]
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45
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Jorge L, Rodrigues B, Rosa KT, Malfitano C, Loureiro TCA, Medeiros A, Curi R, Brum PC, Lacchini S, Montano N, De Angelis K, Irigoyen MC. Cardiac and peripheral adjustments induced by early exercise training intervention were associated with autonomic improvement in infarcted rats: role in functional capacity and mortality. Eur Heart J 2010; 32:904-12. [DOI: 10.1093/eurheartj/ehq244] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
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46
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Robles A, Medeiros A, Berois N, Balter HS, Pauwels EK, Osinaga E. In-site interaction evaluation of Tn density by inhibition/competition assays. Nucl Med Biol 2010; 37:453-8. [PMID: 20447557 DOI: 10.1016/j.nucmedbio.2009.10.009] [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] [Received: 06/04/2009] [Revised: 10/29/2009] [Accepted: 10/31/2009] [Indexed: 10/19/2022]
Abstract
The tumor-associated structure N-acetyl-galactosamine-O-Ser/Thr (Tn antigen), which is overexpressed in various tumor cell types, notably of the breast, ovary and colon, is an interesting determinant that is useful for cancer diagnosis and follow-up. The aim of this research was to study different assay strategies in order to determine the most sensitive system for further application in epitope characterization and binding assessment. The tetrameric isolectin obtained from Vicia villosa seeds (VVLB(4)) shows high affinity for the tumor-associated structure. A monoclonal antibody against VVLB(4), MabVV(34), was generated, and the interaction between MabVV(34) and VVLB(4) was studied by means of binding and inhibition assays. Several synthetic peptides (10 amino acid sequences) designed from the amino acid sequence of VVLB(4) and obtained from trypsin digestion were tested to determine which amino acids were involved in the interaction between MabVV(34) and VVLB(4). The further unraveling of this epitope was investigated by inhibition using designed synthetic peptides as well as mixtures mimicking variable density effect. Under the experimental circumstances, MabVV(34) was able to inhibit the binding of VVLB(4) to Tn. Two of the four peptide sequences assayed showed better inhibition properties. Finally, mixtures containing these selected sequences allowed the evaluation of binding and inhibition as a function of Tn density. We conclude that the present study facilitates the further development of a specific Tn marker and may contribute to the development of Tn-like radiolabelled peptides or Tn-specific radiolabelled fragments providing a highly selective tool for cancer diagnosis and treatment. This strategy may contribute to characterize the new generation of radiopharmaceuticals for diagnosis and therapy based on biomolecules like antibodies, fragments or peptides, whose application is directly guided by their specific molecular recognition.
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Affiliation(s)
- Ana Robles
- Radiopharmacy Department, Nuclear Research Center, Faculty of Sciences, University of the Republic, Montevideo, Uruguay.
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47
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Costa A, Albuquerque D, Melo R, Medeiros A, Vargas A, Souza A, Amorim M, Scavuzzi A. P598 Comparison of the intra and post operatory results between two hysterectomy techniques in patients with benign diseases in a teaching hospital in Brazil. A randomized clinical trial. Int J Gynaecol Obstet 2009. [DOI: 10.1016/s0020-7292(09)62088-9] [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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48
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Oliveira RSF, Ferreira JCB, Gomes ERM, Paixão NA, Rolim NPL, Medeiros A, Guatimosim S, Brum PC. Cardiac anti-remodelling effect of aerobic training is associated with a reduction in the calcineurin/NFAT signalling pathway in heart failure mice. J Physiol 2009; 587:3899-910. [PMID: 19505981 DOI: 10.1113/jphysiol.2009.173948] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Cardiomyocyte hypertrophy occurs in response to a variety of physiological and pathological stimuli. While pathological hypertrophy in heart failure is usually coupled with depressed contractile function, physiological hypertrophy associates with increased contractility. In the present study, we explored whether 8 weeks of moderate intensity exercise training would lead to a cardiac anti-remodelling effect in an experimental model of heart failure associated with a deactivation of a pathological (calcineurin/NFAT, CaMKII/HDAC) or activation of a physiological (Akt-mTOR) hypertrophy signalling pathway. The cardiac dysfunction, exercise intolerance, left ventricle dilatation, increased heart weight and cardiomyocyte hypertrophy from mice lacking alpha(2A) and alpha(2C) adrenoceptors (alpha(2A)/alpha(2C)ARKO mice) were associated with sympathetic hyperactivity induced heart failure. The relative contribution of Ca(2+)-calmodulin high-affinity (calcineurin/NFAT) and low-affinity (CaMKII/HDAC) targets to pathological hypertrophy of alpha(2A)/alpha(2C)ARKO mice was verified. While nuclear calcineurin B, NFATc3 and GATA-4 translocation were significantly increased in alpha(2A)/alpha(2C)ARKO mice, no changes were observed in CaMKII/HDAC activation. As expected, cyclosporine treatment decreased nuclear translocation of calcineurin/NFAT in alpha(2A)/alpha(2C)ARKO mice, which was associated with improved ventricular function and a pronounced anti-remodelling effect. The Akt/mTOR signalling pathway was not activated in alpha(2A)/alpha(2C)ARKO mice. Exercise training improved cardiac function and exercise capacity in alpha(2A)/alpha(2C)ARKO mice and decreased heart weight and cardiomyocyte width paralleled by diminished nuclear NFATc3 and GATA-4 translocation as well as GATA-4 expression levels. When combined, these findings support the notion that deactivation of calcineurin/NFAT pathway-induced pathological hypertrophy is a preferential mechanism by which exercise training leads to the cardiac anti-remodelling effect in heart failure.
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Affiliation(s)
- R S F Oliveira
- School of Physical Education and Sport, University of Sao Paulo, SP, Brazil
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49
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Alves A, Medeiros A, Francisco V, Bourbon M, Investigators of the PSFH. Abstract: P829 FAMILIAL HYPERCHOLESTEROLAEMIA: A PERSPECTIVE OF 10 YEARS OF STUDY IN PORTUGAL. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)71183-3] [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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50
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Bourbon M, Alves A, Duarte M, Medeiros A, Soutar A. FUNCTIONAL ANALYSIS OF POTENCIAL SPLICE SITE MUTATIONS IN THE LDLR GENE. ATHEROSCLEROSIS SUPP 2008. [DOI: 10.1016/s1567-5688(08)70077-1] [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: 11/30/2022]
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