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Islam A, do Prado BR, Dittz D, Rodrigues BL, Silva SMD, do Monte-Neto RL, Shabeer M, Frézard F, Demicheli C. Susceptibility of Leishmania to novel pentavalent organometallics: Investigating impact on DNA and membrane integrity in antimony(III)-sensitive and -resistant strains. Drug Dev Res 2024; 85:e22194. [PMID: 38704828 DOI: 10.1002/ddr.22194] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 04/16/2024] [Accepted: 04/18/2024] [Indexed: 05/07/2024]
Abstract
The aim the present study was to investigate the impact of novel pentavalent organobismuth and organoantimony complexes on membrane integrity and their interaction with DNA, activity against Sb(III)-sensitive and -resistant Leishmania strains and toxicity in mammalian peritoneal macrophages. Ph3M(L)2 type complexes were synthesized, where M = Sb(V) or Bi(V) and L = deprotonated 3-(dimethylamino)benzoic acid or 2-acetylbenzoic acid. Both organobismuth(V) and organoantimony(V) complexes exhibited efficacy at micromolar concentrations against Leishmania amazonensis and L. infantum but only the later ones demonstrated biocompatibility. Ph3Sb(L1)2 and Ph3Bi(L1)2 demonstrated distinct susceptibility profiles compared to inorganic Sb(III)-resistant strains of MRPA-overexpressing L. amazonensis and AQP1-mutated L. guyanensis. These complexes were able to permeate the cell membrane and interact with the Leishmania DNA, suggesting that this effect may contribute to the parasite growth inhibition via apoptosis. Taken altogether, our data substantiate the notion of a distinct mechanism of uptake pathway and action in Leishmania for these organometallic complexes, distinguishing them from the conventional inorganic antimonial drugs.
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Affiliation(s)
- Arshad Islam
- Department of Physiology and Biophysics, Postgraduate Program in Physiology and Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
- Department of Chemistry, Institute of Exact Sciences, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
- Department of Pathology, Government Lady Reading Hospital Medical Teaching Institution, Peshawar, Pakistan
| | - Bruno Rodrigues do Prado
- Department of Chemistry, Institute of Exact Sciences, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Dalton Dittz
- Department of Biochemistry and Pharmacology, Health Sciences Center, Federal University of Piauí (UFPI), Av. Universitária, Teresina, Brazil
| | - Bernardo Lages Rodrigues
- Department of Chemistry, Institute of Exact Sciences, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Sydnei Magno da Silva
- Institute of Biomedical Sciences, Universidade Federal de Uberlândia, Av Amazonas, s/n, Umuarama, Brazil
| | | | - Muhammad Shabeer
- Department of Chemistry, Institute of Exact Sciences, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Frédéric Frézard
- Department of Physiology and Biophysics, Postgraduate Program in Physiology and Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Cynthia Demicheli
- Department of Chemistry, Institute of Exact Sciences, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
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Cunha Matosinhos R, Frézard F, Mendes Silva Araújo S, Magalhães Barbosa A, de Souza IF, de Souza Filho JD, de Souza J, Corrêa Oliveira Bahia AP, Ietta F, Magnani A, Saúde-Guimarães DA. Development and characterization of liposomal formulations containing sesquiterpene lactones for the treatment of chronic gout. Sci Rep 2024; 14:6991. [PMID: 38523180 PMCID: PMC10961318 DOI: 10.1038/s41598-024-57663-1] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Accepted: 03/20/2024] [Indexed: 03/26/2024] Open
Abstract
Gout and hyperuricemia are characterized by high uric acid levels, and their treatment involves medications that have adverse effects. In this study, we evaluated oral liposomal formulations with eremantholide C and goyazensolide as a novel approach to reduce the toxicity associated with these substances while maintaining their anti-hyperuricemic activity. We characterized the formulations and evaluated them based on encapsulation efficiency and stability over 12 months and under simulated physiological environments. We determined the toxicity of the liposomal formulations in Caco-2 cells and the anti-hyperuricemic activity in rats. The formulations exhibited nanometric size, a narrow size distribution, and a negative zeta potential, indicating their stability and uniformity. The efficient encapsulation of the sesquiterpene lactones within the liposomes emphasizes their potential for sustained release and therapeutic efficacy. Stability evaluation revealed a small decrease in the eremantholide C concentration and a remarkable stability in the goyazensolide concentration. In Caco-2 cells, the liposomes did not exert toxicity, but did exhibit an antiproliferative effect. In vivo assays demonstrated that the liposomes reduced serum uric acid levels. Our study represents an advancement in gout and hyperuricemia treatment. The liposomal formulations effectively reduced the toxicity associated with the sesquiterpene lactones while maintaining their therapeutic effects.
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Affiliation(s)
- Rafaela Cunha Matosinhos
- Laboratório de Plantas Medicinais (LAPLAMED), Programa de Pós-Graduação em Ciências Farmacêuticas (CiPharma), Escola de Farmácia, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, 35400-000, Brazil
| | - Frédéric Frézard
- Laboratório de Biofísica e Sistemas Nanoestruturados (LabNano), Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | - Sabrina Mendes Silva Araújo
- Laboratório de Biofísica e Sistemas Nanoestruturados (LabNano), Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | - Andressa Magalhães Barbosa
- Laboratório de Plantas Medicinais (LAPLAMED), Programa de Pós-Graduação em Ciências Farmacêuticas (CiPharma), Escola de Farmácia, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, 35400-000, Brazil
| | - Isabela Fernanda de Souza
- Laboratório de Plantas Medicinais (LAPLAMED), Programa de Pós-Graduação em Ciências Farmacêuticas (CiPharma), Escola de Farmácia, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, 35400-000, Brazil
| | - José Dias de Souza Filho
- Laboratório Multiusuário de Caracterização de Moléculas (LMCM), Escola de Farmácia, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, 35400-000, Brazil
| | - Jacqueline de Souza
- Laboratório de Controle de Qualidade de Insumos, Fármacos e Medicamentos (LCQ), Escola de Farmácia, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, 35400-000, Brazil
| | - Ana Paula Corrêa Oliveira Bahia
- Laboratório de Biofísica e Sistemas Nanoestruturados (LabNano), Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | - Francesca Ietta
- Dipartimento Scienze della Vita, Università degli Studi di Siena, 53100, Siena, Tuscany, Italy
| | - Agnese Magnani
- Dipartimento di Biotecnologie, Chimica e Farmacia, Università degli Studi di Siena, 53100, Siena, Tuscany, Italy
| | - Dênia Antunes Saúde-Guimarães
- Laboratório de Plantas Medicinais (LAPLAMED), Programa de Pós-Graduação em Ciências Farmacêuticas (CiPharma), Escola de Farmácia, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, 35400-000, Brazil.
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da Silva WN, Carvalho Costa PA, Scalzo Júnior SRA, Ferreira HAS, Prazeres PHDM, Campos CLV, Rodrigues Alves MT, Alves da Silva NJ, de Castro Santos AL, Guimarães LC, Chen Ferris ME, Thatte A, Hamilton A, Bicalho KA, Lobo AO, Santiago HDC, da Silva Barcelos L, Figueiredo MM, Teixeira MM, Vasconcelos Costa V, Mitchell MJ, Frézard F, Pires Goulart Guimaraes P. Ionizable Lipid Nanoparticle-Mediated TRAIL mRNA Delivery in the Tumor Microenvironment to Inhibit Colon Cancer Progression. Int J Nanomedicine 2024; 19:2655-2673. [PMID: 38500680 PMCID: PMC10946446 DOI: 10.2147/ijn.s452896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Accepted: 03/05/2024] [Indexed: 03/20/2024] Open
Abstract
Introduction Immunotherapy has revolutionized cancer treatment by harnessing the immune system to enhance antitumor responses while minimizing off-target effects. Among the promising cancer-specific therapies, tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) has attracted significant attention. Methods Here, we developed an ionizable lipid nanoparticle (LNP) platform to deliver TRAIL mRNA (LNP-TRAIL) directly to the tumor microenvironment (TME) to induce tumor cell death. Our LNP-TRAIL was formulated via microfluidic mixing and the induction of tumor cell death was assessed in vitro. Next, we investigated the ability of LNP-TRAIL to inhibit colon cancer progression in vivo in combination with a TME normalization approach using Losartan (Los) or angiotensin 1-7 (Ang(1-7)) to reduce vascular compression and deposition of extracellular matrix in mice. Results Our results demonstrated that LNP-TRAIL induced tumor cell death in vitro and effectively inhibited colon cancer progression in vivo, particularly when combined with TME normalization induced by treatment Los or Ang(1-7). In addition, potent tumor cell death as well as enhanced apoptosis and necrosis was found in the tumor tissue of a group treated with LNP-TRAIL combined with TME normalization. Discussion Together, our data demonstrate the potential of the LNP to deliver TRAIL mRNA to the TME and to induce tumor cell death, especially when combined with TME normalization. Therefore, these findings provide important insights for the development of novel therapeutic strategies for the immunotherapy of solid tumors.
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Affiliation(s)
- Walison Nunes da Silva
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | | | | | - Heloísa A S Ferreira
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | | | | | | | | | | | - Lays Cordeiro Guimarães
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Maria Eduarda Chen Ferris
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Ajay Thatte
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
| | - Alex Hamilton
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
| | | | | | - Helton da Costa Santiago
- Department of Biochemistry and Immunology, Federal University of Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | - Lucíola da Silva Barcelos
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | | | - Mauro Martins Teixeira
- Department of Biochemistry and Immunology, Federal University of Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | | | - Michael J Mitchell
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
| | - Frédéric Frézard
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
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Marques Borges GS, Santos TT, Pinto CM, Frézard F, Blanco VF, Ondei R, Rumbelow S, Miranda Ferreira LA, Gontijo de Aguiar MM, Castro Goulart GA. Distearoyl phosphatidylglycerol and dioleoyl phosphatidylglycerol increase the retention and reduce the toxicity of amphotericin B-loaded in nanoemulsions. Nanomedicine (Lond) 2024; 19:383-396. [PMID: 38293893 DOI: 10.2217/nnm-2023-0256] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2024] Open
Abstract
Aim: To develop nanoemulsions (NEs) loading amphotericin B (AmB) and to evaluate the influence of different excipients on the stability and the supramolecular organization, retention and toxicity of AmB. Materials & methods: The NEs were developed from different oils, surfactants, external media and anionic lipids (disteaoryl phosphatidylglycerol [DSPG] and dioleoyl phosphatidylglycerol [DOPG]). Their impact on the size, pH, zeta potential, AmB encapsulation efficiency, AmB retention and hemolytic potential of the NEs was evaluated. Results & conclusion: The use of soybean oil (lipid matrix), Span 80 (surfactant), phosphate buffer (external phase) and DSPG or DOPG (hydrophobic ion pair) provided better NE stability, higher AmB retention within the NEs and a safer formulation profile in hemolysis tests.
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Affiliation(s)
- Gabriel Silva Marques Borges
- Departamento de Farmácia, Faculdade de Ciências Biológicas e da Saúde, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, 39100-000, Brazil
- Departamento de Produtos Farmacêuticos, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Brazil
| | - Thais Tunes Santos
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Brazil
| | - Cristiane Monteiro Pinto
- Departamento de Produtos Farmacêuticos, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Brazil
| | - Frédéric Frézard
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Brazil
| | | | - Roberta Ondei
- Croda do Brasil, Rua Croda, 580, Campinas, 13054-710, Brazil
| | - Stephen Rumbelow
- Croda Inc, Building 2, Suite 200, 777 Scudders Mill Road, Plainsboro, NJ 08540, USA
| | - Lucas Antônio Miranda Ferreira
- Departamento de Produtos Farmacêuticos, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Brazil
| | - Marta Marques Gontijo de Aguiar
- Departamento de Produtos Farmacêuticos, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Brazil
| | - Gisele Assis Castro Goulart
- Departamento de Produtos Farmacêuticos, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Brazil
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Demicheli C, Vallejos VMR, Lanza JS, Ramos GS, Do Prado BR, Pomel S, Loiseau PM, Frézard F. Supramolecular assemblies from antimony(V) complexes for the treatment of leishmaniasis. Biophys Rev 2023; 15:751-765. [PMID: 37681109 PMCID: PMC10480371 DOI: 10.1007/s12551-023-01073-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 05/30/2023] [Indexed: 09/09/2023] Open
Abstract
The pentavalent meglumine antimoniate (MA) is still a first-line drug in the treatment of leishmaniasis in several countries. As an attempt to elucidate its mechanism of action and develop new antimonial drugs with improved therapeutic profile, Sb(V) complexes with different ligands, including β-cyclodextrin (β-CD), nucleosides and non-ionic surfactants, have been studied. Interestingly, Sb(V) oxide, MA, its complex with β-CD, Sb(V)-guanosine complex and amphiphilic Sb(V) complexes with N-alkyl-N-methylglucamide, have shown marked tendency to self-assemble in aqueous solutions, forming nanoaggregates, hydrogel or micelle-like nanoparticles. Surprisingly, the resulting assemblies presented in most cases slow dissociation kinetics upon dilution and a strong influence of pH, which impacted on their pharmacokinetic and therapeutic properties against leishmaniasis. To explain this unique property, we raised the hypothesis that multiple pnictogen bonds could contribute to the formation of these assemblies and their kinetic of dissociation. The present article reviews our current knowledge on the structural organization and physicochemical characteristics of Sb-based supramolecular assemblies, as well as their pharmacological properties and potential for treatment of leishmaniasis. This review supports the feasibility of the rational design of new Sb(V) complexes with supramolecular assemblies for the safe and effective treatment of leishmaniasis.
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Affiliation(s)
- Cynthia Demicheli
- Department of Chemistry, Institute of Exact Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG 31270-901 Brazil
| | - Virgínia M. R. Vallejos
- Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG 31270-901 Brazil
| | | | - Guilherme S. Ramos
- Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG 31270-901 Brazil
| | - Bruno R. Do Prado
- Department of Chemistry, Institute of Exact Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG 31270-901 Brazil
| | - Sébastien Pomel
- Faculty of Pharmacy, Antiparasite Chemotherapy (PARACHEM), UMR 8076 CNRS BioCIS, University Paris-Saclay, 91400 Orsay, France
| | - Philippe M. Loiseau
- Faculty of Pharmacy, Antiparasite Chemotherapy (PARACHEM), UMR 8076 CNRS BioCIS, University Paris-Saclay, 91400 Orsay, France
| | - Frédéric Frézard
- Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG 31270-901 Brazil
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de Castro Santos AL, da Silva NJA, Viana CTR, Dos Santos LCC, da Silva GHC, Scalzo Júnior SRA, Costa PAC, da Silva WN, de Jesus ICG, Birbrair A, de Magalhães MTQ, Frézard F, Guatimosim S, Haley RM, Mitchell MJ, Andrade SP, Campos PP, Guimaraes PPG. Oral formulation of Wnt inhibitor complex reduces inflammation and fibrosis in intraperitoneal implants in vivo. Drug Deliv Transl Res 2023; 13:1420-1435. [PMID: 36749480 DOI: 10.1007/s13346-023-01303-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/24/2023] [Indexed: 02/08/2023]
Abstract
The use of implantable biomaterials to replace physiological and anatomical functions has been widely investigated in the clinic. However, the selection of biomaterials is crucial for long-term function, and the implantation of certain biomaterials can cause inflammatory and fibrotic processes, triggering a foreign body reaction that leads to loss of function and consequent need for removal. Specifically, the Wnt signaling pathway controls the healing process of the human body, and its dysregulation can result in inflammation and fibrosis, such as in peritoneal fibrosis. Here, we assessed the effects of daily oral administration of a Wnt pathway inhibitor complex (CD:LGK974) to reduce the inflammatory, fibrotic, and angiogenic processes caused by intraperitoneal implants. CD:LGK974 significantly reduced the infiltration of immune cells and release of inflammatory cytokines in the implant region compared to the control groups. Furthermore, CD:LGK974 inhibited collagen deposition and reduced the expression of pro-fibrotic α-SMA and TGF-β1, confirming fibrosis reduction. Finally, the CD:LGK974 complex decreased VEGF levels and both the number and area of blood vessels formed, suggesting decreased angiogenesis. This work introduces a potential new application of the Wnt inhibitor complex to reduce peritoneal fibrosis and the rejection of implants at the intraperitoneal site, possibly allowing for longer-term functionality of existing clinical biomaterials.
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Affiliation(s)
- Ana Luíza de Castro Santos
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Av. Pres. Antônio Carlos, 6627-Pampulha, Belo Horizonte-MG, 31270-901, Brazil
| | - Natália Jordana Alves da Silva
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Av. Pres. Antônio Carlos, 6627-Pampulha, Belo Horizonte-MG, 31270-901, Brazil
| | - Celso Tarso Rodrigues Viana
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Av. Pres. Antônio Carlos, 6627-Pampulha, Belo Horizonte-MG, 31270-901, Brazil
| | | | - Gabriel Henrique Costa da Silva
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Av. Pres. Antônio Carlos, 6627-Pampulha, Belo Horizonte-MG, 31270-901, Brazil
| | - Sérgio Ricardo Aluotto Scalzo Júnior
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Av. Pres. Antônio Carlos, 6627-Pampulha, Belo Horizonte-MG, 31270-901, Brazil
| | - Pedro Augusto Carvalho Costa
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Av. Pres. Antônio Carlos, 6627-Pampulha, Belo Horizonte-MG, 31270-901, Brazil
| | - Walison Nunes da Silva
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Av. Pres. Antônio Carlos, 6627-Pampulha, Belo Horizonte-MG, 31270-901, Brazil
| | - Itamar Couto Guedes de Jesus
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Av. Pres. Antônio Carlos, 6627-Pampulha, Belo Horizonte-MG, 31270-901, Brazil
| | - Alexander Birbrair
- Department of Pathology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte-MG, 31270-901, Brazil
| | - Mariana T Q de Magalhães
- Department of Biochemistry and Immunology, Federal University of Minas Gerais, Minas Gerais, Belo Horizonte, 31270-901, Brazil
| | - Frédéric Frézard
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Av. Pres. Antônio Carlos, 6627-Pampulha, Belo Horizonte-MG, 31270-901, Brazil
| | - Silvia Guatimosim
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Av. Pres. Antônio Carlos, 6627-Pampulha, Belo Horizonte-MG, 31270-901, Brazil
| | - Rebecca M Haley
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
| | - Michael J Mitchell
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
| | - Silvia Passos Andrade
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Av. Pres. Antônio Carlos, 6627-Pampulha, Belo Horizonte-MG, 31270-901, Brazil
| | - Paula Peixoto Campos
- Department of Pathology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte-MG, 31270-901, Brazil
| | - Pedro Pires Goulart Guimaraes
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Av. Pres. Antônio Carlos, 6627-Pampulha, Belo Horizonte-MG, 31270-901, Brazil.
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Frézard F, Aguiar MMG, Ferreira LAM, Ramos GS, Santos TT, Borges GSM, Vallejos VMR, De Morais HLO. Liposomal Amphotericin B for Treatment of Leishmaniasis: From the Identification of Critical Physicochemical Attributes to the Design of Effective Topical and Oral Formulations. Pharmaceutics 2022; 15:pharmaceutics15010099. [PMID: 36678729 PMCID: PMC9864876 DOI: 10.3390/pharmaceutics15010099] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/19/2022] [Accepted: 12/23/2022] [Indexed: 12/29/2022] Open
Abstract
The liposomal amphotericin B (AmB) formulation, AmBisome®, still represents the best therapeutic option for cutaneous and visceral leishmaniasis. However, its clinical efficacy depends on the patient's immunological status, the clinical manifestation and the endemic region. Moreover, the need for parenteral administration, its side effects and high cost significantly limit its use in developing countries. This review reports the progress achieved thus far toward the understanding of the mechanism responsible for the reduced toxicity of liposomal AmB formulations and the factors that influence their efficacy against leishmaniasis. It also presents the recent advances in the development of more effective liposomal AmB formulations, including topical and oral liposome formulations. The critical role of the AmB aggregation state and release rate in the reduction of drug toxicity and in the drug efficacy by non-invasive routes is emphasized. This paper is expected to guide future research and development of innovative liposomal formulations of AmB.
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Affiliation(s)
- Frédéric Frézard
- Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
- Correspondence: ; Tel.: +55-31-34092940
| | - Marta M. G. Aguiar
- Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
| | - Lucas A. M. Ferreira
- Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
| | - Guilherme S. Ramos
- Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
| | - Thais T. Santos
- Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
| | - Gabriel S. M. Borges
- Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
| | - Virgínia M. R. Vallejos
- Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
| | - Helane L. O. De Morais
- Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
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8
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Mansur-Alves I, Lima BLF, Santos TT, Araújo NF, Frézard F, Islam A, de Barros AL, Dos Santos DC, Fernandes C, Ferreira LA, Aguiar MM. Cholesterol improves stability of amphotericin B nanoemulsion: promising use in the treatment of cutaneous leishmaniasis. Nanomedicine (Lond) 2022; 17:1237-1251. [PMID: 36189757 DOI: 10.2217/nnm-2021-0489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Aim: Amphotericin B (AmB) is an antileishmanial drug with high toxicity; however, this drawback might overcome by decreasing the AmB self-aggregation state. This work aimed at evaluating the influence of cholesterol on the aggregation state of AmB loaded in a nanoemulsion (NE-AmB) for the treatment of cutaneous leishmaniasis. NE-AmB (1, 4 and 8 mg/kg/day) was administered intravenously to animals infected by Leishmania major every 2 days for a total of five injections. Results: Ultraviolet-visible spectroscopy and circular dichroism studies demonstrated that cholesterol reduced AmB aggregation state in NE. NE-AmB was stable after 180 days, and its hemolytic toxicity was lower than that observed for the conventional AmB. NE-AmB administered intravenously into animals infected by Leishmania major at 8 mg/kg was capable of stabilizing the lesion size and reducing the parasitic load. Conclusion: These findings support the NE potential as a stable nanocarrier for AmB in the treatment of cutaneous leishmaniasis.
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Affiliation(s)
- Izabela Mansur-Alves
- Department of Pharmaceutics, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, 31270-010, Brazil
| | - Brenda Lorrayne Furtado Lima
- Department of Pharmaceutics, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, 31270-010, Brazil
| | - Thais Tunes Santos
- Department of Pharmaceutics, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, 31270-010, Brazil
| | - Naialy F Araújo
- Department of Pharmaceutics, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, 31270-010, Brazil
| | - Frédéric Frézard
- Department of Physiology & Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, 31270-010, Brazil
| | - Arshad Islam
- Department of Pathology, Government Lady Reading Hospital, Medical Teaching Institution, Peshawar, 25100, Pakistan
| | - André Lb de Barros
- Department of Clinical & Toxicological Analysis, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, 31270-010, Brazil
| | - Délia Cm Dos Santos
- Department of Pharmacy & Nutrition, Center for Exact, Natural & Health Sciences, Federal University of Espírito Santo, Alto Universitario, Alegre, Espírito Santo, 29500-000, Brazil
| | - Christian Fernandes
- Department of Pharmaceutics, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, 31270-010, Brazil
| | - Lucas Am Ferreira
- Department of Pharmaceutics, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, 31270-010, Brazil
| | - Marta Mg Aguiar
- Department of Pharmaceutics, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, 31270-010, Brazil
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9
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Ramos GS, Vallejos VMR, Borges GSM, Almeida RM, Alves IM, Aguiar MMG, Fernandes C, Guimarães PPG, Fujiwara RT, Loiseau PM, Ferreira LAM, Frézard F. Formulation of Amphotericin B in PEGylated Liposomes for Improved Treatment of Cutaneous Leishmaniasis by Parenteral and Oral Routes. Pharmaceutics 2022; 14:pharmaceutics14050989. [PMID: 35631575 PMCID: PMC9147047 DOI: 10.3390/pharmaceutics14050989] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 04/25/2022] [Accepted: 04/25/2022] [Indexed: 11/16/2022] Open
Abstract
Liposomal amphotericin B (AmB) or AmBisome® is the most effective and safe therapeutic agent for visceral leishmaniasis (VL), but its clinical efficacy is limited in cutaneous leishmaniasis (CL) and HIV/VL co-infection. The aim of this work was to develop a formulation of AmB in PEGylated liposomes and compare its efficacy to AmBisome® in a murine model of CL. Formulations of AmB in conventional and PEGylated liposomes were characterized for particle size and morphology, drug encapsulation efficiency and aggregation state. Those were compared to AmBisome® in Leishmania amazonensis-infected BALB/c mice for their effects on the lesion size growth and parasite load. The conventional and PEGylated formulations showed vesicles with 100–130 nm diameter and low polydispersity, incorporating more than 95% of AmB under the non-aggregated form. Following parenteral administration in the murine model of CL, the PEGylated formulation of AmB significantly reduced the lesion size growth and parasite load, in comparison to control groups, in contrast to conventional liposomal AmB. The PEGylated formulation of AmB was also effective when given by oral route on a 2-day regimen. This work reports for the first time that PEGylated liposomal AmB can improve the treatment of experimental cutaneous leishmaniasis by both parenteral and oral routes.
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Affiliation(s)
- Guilherme S. Ramos
- Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (G.S.R.); (V.M.R.V.); (P.P.G.G.)
| | - Virgínia M. R. Vallejos
- Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (G.S.R.); (V.M.R.V.); (P.P.G.G.)
| | - Gabriel S. M. Borges
- Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (G.S.M.B.); (I.M.A.); (M.M.G.A.); (C.F.); (L.A.M.F.)
| | - Raquel M. Almeida
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (R.M.A.); (R.T.F.)
| | - Izabela M. Alves
- Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (G.S.M.B.); (I.M.A.); (M.M.G.A.); (C.F.); (L.A.M.F.)
| | - Marta M. G. Aguiar
- Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (G.S.M.B.); (I.M.A.); (M.M.G.A.); (C.F.); (L.A.M.F.)
| | - Christian Fernandes
- Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (G.S.M.B.); (I.M.A.); (M.M.G.A.); (C.F.); (L.A.M.F.)
| | - Pedro P. G. Guimarães
- Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (G.S.R.); (V.M.R.V.); (P.P.G.G.)
| | - Ricardo T. Fujiwara
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (R.M.A.); (R.T.F.)
| | - Philippe M. Loiseau
- Faculty of Pharmacy, Antiparasite Chemotherapy, UMR 8076 CNRS BioCIS, University Paris-Saclay, F-92296 Chatenay-Malabry, France;
| | - Lucas A. M. Ferreira
- Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (G.S.M.B.); (I.M.A.); (M.M.G.A.); (C.F.); (L.A.M.F.)
| | - Frédéric Frézard
- Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (G.S.R.); (V.M.R.V.); (P.P.G.G.)
- Correspondence: ; Tel.: +55-31-34092940
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10
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Loiseau PM, Balaraman K, Barratt G, Pomel S, Durand R, Frézard F, Figadère B. The Potential of 2-Substituted Quinolines as Antileishmanial Drug Candidates. Molecules 2022; 27:molecules27072313. [PMID: 35408712 PMCID: PMC9000572 DOI: 10.3390/molecules27072313] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 03/29/2022] [Accepted: 03/30/2022] [Indexed: 01/27/2023] Open
Abstract
There is a need for new, cost-effective drugs to treat leishmaniasis. A strategy based on traditional medicine practiced in Bolivia led to the discovery of the 2-substituted quinoline series as a source of molecules with antileishmanial activity and low toxicity. This review documents the development of the series from the first isolated natural compounds through several hundred synthetized molecules to an optimized compound exhibiting an in vitro IC50 value of 0.2 µM against Leishmania donovani, and a selectivity index value of 187, together with in vivo activity on the L. donovani/hamster model. Attempts to establish structure–activity relationships are described, as well as studies that have attempted to determine the mechanism of action. For the latter, it appears that molecules of this series act on multiple targets, possibly including the immune system, which could explain the observed lack of drug resistance after in vitro drug pressure. We also show how nanotechnology strategies could valorize these drugs through adapted formulations and how a mechanistic targeting approach could generate new compounds with increased activity.
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Affiliation(s)
- Philippe M. Loiseau
- Antiparasite Chemotherapy, CNRS, BioCIS, Université Paris-Saclay, 92290 Chatenay-Malabry, France; (S.P.); (R.D.)
- Correspondence:
| | - Kaluvu Balaraman
- Chemistry Department, Georgetown University, 37th and O Streets, Washington, DC 20057, USA;
| | - Gillian Barratt
- Institute Galien Paris-Saclay, CNRS, Université Paris-Saclay, 92290 Chatenay-Malabry, France;
| | - Sébastien Pomel
- Antiparasite Chemotherapy, CNRS, BioCIS, Université Paris-Saclay, 92290 Chatenay-Malabry, France; (S.P.); (R.D.)
| | - Rémy Durand
- Antiparasite Chemotherapy, CNRS, BioCIS, Université Paris-Saclay, 92290 Chatenay-Malabry, France; (S.P.); (R.D.)
| | - Frédéric Frézard
- Department of Physiology and Biophysics-ICB, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil;
| | - Bruno Figadère
- Chimie des Substances Naturelles, CNRS, BioCIS, Université Paris-Saclay, 92290 Chatenay-Malabry, France;
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11
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Cardoso JMDO, Brito RCFD, Mathias FAS, Reis LES, Vieira JFP, Ostolin TLVDP, Andrade HMD, Ramos GS, Frézard F, Aguiar-Soares RDDO, Roatt BM, Reis AB. Comparative evaluation of meglumine antimoniate encapsulated in a mixture of conventional and PEGylated liposomes and immunotherapy using an anti-canine IL-10 receptor-blocking monoclonal antibody on canine visceral leishmaniasis. Mol Immunol 2021; 141:70-78. [PMID: 34814056 DOI: 10.1016/j.molimm.2021.11.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 10/28/2021] [Accepted: 11/13/2021] [Indexed: 10/19/2022]
Abstract
This study compared the therapeutic potential of the chemotherapy using meglumine antimoniate encapsulated in a mixture of conventional and PEGylated liposomes (Nano Sbv) and immunotherapy with anti-canine IL-10 receptor-blocking monoclonal antibody (Anti IL-10R) on canine visceral leishmaniasis (CVL). Twenty mongrel dogs naturally infected by L. infantum, displaying clinical signs of visceral leishmaniasis were randomly divided in two groups. In the first one, nine dogs received six intravenous doses of a mixture of conventional and PEGylated liposomes containing meglumine antimoniate at 6.5 mg Sb/kg/dose. In the second one, eleven dogs received two intramuscular doses of 4 mg of anti-canine IL-10 receptor-blocking monoclonal antibody. The animals were evaluated before (T0) and 30, 90, and 180 days after treatments. Our major results demonstrated that both treatments were able to maintain hematological and biochemical parameters, increase circulating T lymphocytes subpopulations, increase the IFN-γ producing T-CD4 lymphocytes, restore the lymphoproliferative capacity and improve the clinical status. However, although these improvements were observed in the initial post-treatment times, they did not maintain until the end of the experimental follow-up. We believe that the use of booster doses or the association of chemotherapy and immunotherapy (immunochemotherapy) is promising to improve the effectiveness of treating CVL for improving the clinical signs and possibly reducing the parasite burden in dogs infected with Leishmania infantum.
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Affiliation(s)
- Jamille Mirelle de Oliveira Cardoso
- Laboratório de Imunopatologia, Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | - Rory Cristiane Fortes de Brito
- Laboratório de Imunopatologia, Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | - Fernando Augusto Siqueira Mathias
- Laboratório de Imunopatologia, Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | - Levi Eduardo Soares Reis
- Laboratório de Imunopatologia, Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | - João Filipe Pereira Vieira
- Laboratório de Imunopatologia, Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | | | - Hélida Monteiro de Andrade
- Laboratório de Leishmanioses, Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Guilherme Santos Ramos
- Laboratório de Biofísica de Sistemas Nanoestruturados, Departamento de Fisiologia e Biofısica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Frédéric Frézard
- Laboratório de Biofísica de Sistemas Nanoestruturados, Departamento de Fisiologia e Biofısica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | | | - Bruno Mendes Roatt
- Laboratório de Imunopatologia, Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brazil; Instituto Nacional de Ciência e Tecnologia em Doenças Tropicais, INCT-DT, Brazil
| | - Alexandre Barbosa Reis
- Laboratório de Imunopatologia, Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brazil; Instituto Nacional de Ciência e Tecnologia em Doenças Tropicais, INCT-DT, Brazil.
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12
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Ramos GS, Vallejos VMR, Ladeira MS, Reis PG, Souza DM, Machado YA, Ladeira LO, Pinheiro MBV, Melo MN, Fujiwara RT, Frézard F. Antileishmanial activity of fullerol and its liposomal formulation in experimental models of visceral leishmaniasis. Biomed Pharmacother 2021; 134:111120. [PMID: 33341671 DOI: 10.1016/j.biopha.2020.111120] [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] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 11/30/2020] [Accepted: 12/04/2020] [Indexed: 11/16/2022] Open
Abstract
Visceral leishmaniasis (VL) is a systemic parasitic disease that leads to high rates of morbidity and mortality in humans worldwide. There is a great need to develop new drugs and novel strategies to make chemotherapy for this disease more efficacious and well tolerated. Recent reports on the immunomodulatory effects and the low toxicity of the spherical carbon nanostructure fullerol led us to investigate in vitro and in vivo antileishmanial activity in free and encapsulated forms in liposomes. When assayed against intramacrophagic Leishmania amastigotes, fullerol showed a dose-dependent reduction of the infection index with IC50 of 0.042 mg/mL. When given daily by i.p. route for 20 days (0.05 mg/kg/d) in a murine model of acute VL, fullerol promoted significant reduction in the liver parasite load. To improve the delivery of fullerol to the infection sites, liposomal formulations were prepared by the dehydration-rehydration method. When evaluated in the acute VL model, liposomal fullerol (Lip-Ful) formulations given i.p. at 0.05 and 0.2 mg/kg with 4-days intervals were more effective than the free form, with significant parasite reductions in both liver and spleen. Lip-Ful at 0.2 mg/kg promoted complete parasite elimination in the liver. The antileishmanial activity of Lip-Ful was further confirmed in a chronic model of VL. Lip-Ful was also found to induce secretion of pro-inflammatory TNF-α, IFN-γ and IL-1β cytokines. In conclusion, this work reports for the first time the antileishmanial activity of fullerol and introduces an innovative approach for treatment of VL based on the association of this nanostructure with liposomes.
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Affiliation(s)
- Guilherme S Ramos
- Departamento de Fisiologia e Biofísica, Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, Pampulha, 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Virgínia M R Vallejos
- Departamento de Fisiologia e Biofísica, Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, Pampulha, 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Marina S Ladeira
- Departamento de Fisiologia e Biofísica, Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, Pampulha, 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Priscila G Reis
- Departamento de Fisiologia e Biofísica, Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, Pampulha, 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Daniel M Souza
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, Pampulha, 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Yuri A Machado
- Departamento de Fisiologia e Biofísica, Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, Pampulha, 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Luiz O Ladeira
- Departamento de Física, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, Pampulha, 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Maurício B V Pinheiro
- Departamento de Física, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, Pampulha, 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Maria N Melo
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, Pampulha, 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Ricardo T Fujiwara
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, Pampulha, 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Frédéric Frézard
- Departamento de Fisiologia e Biofísica, Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, Pampulha, 31270-901, Belo Horizonte, Minas Gerais, Brazil.
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13
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Lanza JS, Vucen S, Flynn O, Donadei A, Cojean S, Loiseau PM, Fernandes APSM, Frézard F, Moore AC. A TLR9-adjuvanted vaccine formulated into dissolvable microneedle patches or cationic liposomes protects against leishmaniasis after skin or subcutaneous immunization. Int J Pharm 2020; 586:119390. [PMID: 32540349 DOI: 10.1016/j.ijpharm.2020.119390] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [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: 12/16/2019] [Revised: 04/11/2020] [Accepted: 04/28/2020] [Indexed: 12/13/2022]
Abstract
Re-emergence and geographic expansion of leishmaniasis is accelerating efforts to develop a safe and effective Leshmania vaccine. Vaccines using Leishmania recombinant antigens, such as LiHyp1, which is mostly present in the amastigote parasite form, are being developed as a next generation to crude killed parasite-based vaccines. The main objective of this work was to develop a LiHyp1-based vaccine and determine if it can induce protective immunity in BALB/c mice when administered using a dissolvable microneedle (DMN) patch by the skin route. The LiHyp1 antigen was incorporated into cationic liposomes (CL), with or without the TLR9 agonist, CpG. The LiHyp1-liposomal vaccines were characterized with respect to size, protein encapsulation rates and retention of their physical characteristics after incorporation into the DMN patch. DMN mechanical strength and skin penetration ability were tested. A vaccine composed of LiHyp1, CpG and liposomes and subcutaneously injected or a vaccine containing antigen and CpG in DMN patches, without liposomes, induced high antibody responses and significant levels of protection against L. donovani parasite infection. This study progresses the development of an efficacious leishmania vaccine by detailing promising vaccine formulations and skin delivery technologies and it addresses protective efficacy of a liposome-based dissolvable microneedle patch vaccine system.
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Affiliation(s)
- Juliane S Lanza
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil; Antiparasite Chemotherapy, UMR 8076 CNRS BioCIS, Faculté de Pharmacie, Université Paris-Sud, Université Paris-Saclay, Chatenay-Malabry, France
| | - Sonja Vucen
- School of Pharmacy, University College Cork, Cork, Ireland
| | - Olivia Flynn
- School of Pharmacy, University College Cork, Cork, Ireland
| | - Agnese Donadei
- School of Pharmacy, University College Cork, Cork, Ireland
| | - Sandrine Cojean
- Antiparasite Chemotherapy, UMR 8076 CNRS BioCIS, Faculté de Pharmacie, Université Paris-Sud, Université Paris-Saclay, Chatenay-Malabry, France
| | - Philippe M Loiseau
- Antiparasite Chemotherapy, UMR 8076 CNRS BioCIS, Faculté de Pharmacie, Université Paris-Sud, Université Paris-Saclay, Chatenay-Malabry, France
| | - Ana Paula S M Fernandes
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Frédéric Frézard
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Anne C Moore
- School of Pharmacy, University College Cork, Cork, Ireland; School of Biochemistry and Cell Biology, University College Cork, Cork, Ireland.
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14
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Tunes LG, Morato RE, Garcia A, Schmitz V, Steindel M, Corrêa-Junior JD, Dos Santos HF, Frézard F, de Almeida MV, Silva H, Moretti NS, de Barros ALB, do Monte-Neto RL. Preclinical Gold Complexes as Oral Drug Candidates to Treat Leishmaniasis Are Potent Trypanothione Reductase Inhibitors. ACS Infect Dis 2020; 6:1121-1139. [PMID: 32283915 DOI: 10.1021/acsinfecdis.9b00505] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The drugs currently used to treat leishmaniases have limitations concerning cost, efficacy, and safety, making the search for new therapeutic approaches urgent. We found that the gold(I)-derived complexes were active against L. infantum and L. braziliensis intracellular amastigotes with IC50 values ranging from 0.5 to 5.5 μM. All gold(I) complexes were potent inhibitors of trypanothione reductase (TR), with enzyme IC50 values ranging from 1 to 7.8 μM. Triethylphosphine-derived complexes enhanced reactive oxygen species (ROS) production and decreased mitochondrial respiration after 2 h of exposure, indicating that gold(I) complexes cause oxidative stress by direct ROS production, by causing mitochondrial damage or by impairing TR activity and thus accumulating ROS. There was no cross-resistance to antimony; in fact, SbR (antimony-resistant mutants) strains were hypersensitive to some of the complexes. BALB/c mice infected with luciferase-expressing L. braziliensis or L. amazonensis and treated orally with 12.5 mg/kg/day of AdT Et (3) or AdO Et (4) presented reduced lesion size and parasite burden, as revealed by bioimaging. The combination of (3) and miltefosine allowed for a 50% reduction in miltefosine treatment time. Complexes 3 and 4 presented favorable pharmacokinetic and toxicity profiles that encourage further drug development studies. Gold(I) complexes are promising antileishmanial agents, with a potential for therapeutic use, including in leishmaniasis caused by antimony-resistant parasites.
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Affiliation(s)
- Luiza G. Tunes
- Instituto René Rachou/Fiocruz Minas−Fundação Oswaldo Cruz, Belo Horizonte 30190-009, Brasil
| | - Roberta E. Morato
- Instituto René Rachou/Fiocruz Minas−Fundação Oswaldo Cruz, Belo Horizonte 30190-009, Brasil
| | - Adriana Garcia
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, Juiz de Fora 36036-900, Brasil
| | - Vinicius Schmitz
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, Juiz de Fora 36036-900, Brasil
| | - Mario Steindel
- Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de Santa Catarina, Florianópolis 88040-900, Brasil
| | - José D. Corrêa-Junior
- Departamento de Morfologia, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brasil
| | - Hélio F. Dos Santos
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, Juiz de Fora 36036-900, Brasil
| | - Frédéric Frézard
- Departamento de Fisiologia e Biofísica, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brasil
| | - Mauro V. de Almeida
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, Juiz de Fora 36036-900, Brasil
| | - Heveline Silva
- Departamento de Química, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brasil
| | - Nilmar S. Moretti
- Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de São Paulo, São Paulo 04023-062, Brasil
| | - André L. B. de Barros
- Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brasil
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15
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Téllez J, Echeverry MC, Romero I, Guatibonza A, Santos Ramos G, Borges De Oliveira AC, Frézard F, Demicheli C. Use of liposomal nanoformulations in antileishmania therapy: challenges and perspectives. J Liposome Res 2020; 31:169-176. [PMID: 32228210 DOI: 10.1080/08982104.2020.1749067] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Leishmaniasis is a parasitic disease treatable and curable, however, the chemotherapeutic agents for their treatment are limited. In South American countries, pentavalent antimonials are still the first line of treatment for cutaneous leishmaniasis with an efficacy of about 75%, but the toxicity of the drug causes serious side effects and remains as the main obstacle for treatment. New knowledge aimed to improve drug delivery into the intracellular environment is essential, especially for drugs currently used in the clinic, to develop new anti-Leishmania formulations. In the present study, we analysed the scientific literature to highlight the progress achieved in the last decade regarding the use of nanotechnology for improving the current leishmaniasis treatments. Results allowed us to conclude that the encapsulated Glucantime liposomal formulation can be improved by means of nanoparticle functionalization processes, resulting in new drug delivery systems that can be potentially proposed as alternative therapies for leishmaniasis treatment.
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Affiliation(s)
- Jair Téllez
- Vicerrectoría de Investigaciones, Universidad Manuela Beltrán, Bogotá, Colombia
| | - Maria Clara Echeverry
- Facultad de Medicina, Departamento de Salud Pública, Universidad Nacional de Colombia, Bogotá, Colombia
| | - Ibeth Romero
- Vicerrectoría de Investigaciones, Universidad Manuela Beltrán, Bogotá, Colombia
| | - Andrea Guatibonza
- Facultad de Medicina, Departamento de Salud Pública, Universidad Nacional de Colombia, Bogotá, Colombia
| | - Guilherme Santos Ramos
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Ana Carolina Borges De Oliveira
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Frédéric Frézard
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Cynthia Demicheli
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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Islam A, Ain Q, Munawar A, Corrêa Junior JD, Khan A, Ahmad F, Demicheli C, Shams DF, Ullah I, Sohail MF, Yasinzai M, Frézard F, Nadhman A. Reactive oxygen species generating photosynthesized ferromagnetic iron oxide nanorods as promising antileishmanial agent. Nanomedicine (Lond) 2020; 15:755-771. [PMID: 32193975 DOI: 10.2217/nnm-2019-0095] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Aim: To investigate the photodynamic therapeutic potential of ferromagnetic iron oxide nanorods (FIONs), using Trigonella foenum-graecum as a reducing agent, against Leishmania tropica. Materials & methods: FIONs were characterized using ultraviolet visible spectroscopy, x-ray diffraction and scanning electron microscopy. Results: FIONs showed excellent activity against L. tropica promastigotes and amastigotes (IC50 0.036 ± 0.003 and 0.072 ± 0.001 μg/ml, respectively) upon 15 min pre-incubation light-emitting diode light (84 lm/W) exposure, resulting in reactive oxygen species generation and induction of cell death via apoptosis. FIONs were found to be highly biocompatible with human erythrocytes (LD50 779 ± 21 μg/ml) and significantly selective (selectivity index >1000) against murine peritoneal macrophages (CC50 102.7 ± 2.9 μg/ml). Conclusion: Due to their noteworthy in vitro antileishmanial properties, FIONs should be further investigated in an in vivo model of the disease.
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Affiliation(s)
- Arshad Islam
- Sulaiman Bin Abdullah Aba Al Khail Centre for Interdisciplinary Research in Basic Sciences, International Islamic University, Islamabad, 44000, Pakistan.,Postgraduate Program in Physiology & Pharmacology, Institute of Biological Sciences, Federal University of Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - Quratul Ain
- Sulaiman Bin Abdullah Aba Al Khail Centre for Interdisciplinary Research in Basic Sciences, International Islamic University, Islamabad, 44000, Pakistan
| | - Amna Munawar
- Sulaiman Bin Abdullah Aba Al Khail Centre for Interdisciplinary Research in Basic Sciences, International Islamic University, Islamabad, 44000, Pakistan
| | - José Dias Corrêa Junior
- Departamento of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - Ajmal Khan
- Department of Biotechnology, Bacha Khan University, Charsadda, KPK, Pakistan
| | - Farhan Ahmad
- Department of Biotechnology, Bacha Khan University, Charsadda, KPK, Pakistan
| | - Cynthia Demicheli
- Department of Chemistry, Institute of Exact Sciences, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - Dilawar Farhan Shams
- Department of Environmental Sciences, Abdul Wali Khan University Mardan, Pakistan
| | - Ikram Ullah
- Sulaiman Bin Abdullah Aba Al Khail Centre for Interdisciplinary Research in Basic Sciences, International Islamic University, Islamabad, 44000, Pakistan
| | - Muhammad Farhan Sohail
- Riphah Institute of Pharmaceutical Sciences, Riphah International University, Lahore Campus, Lahore, Pakistan
| | - Masoom Yasinzai
- Sulaiman Bin Abdullah Aba Al Khail Centre for Interdisciplinary Research in Basic Sciences, International Islamic University, Islamabad, 44000, Pakistan
| | - Frédéric Frézard
- Postgraduate Program in Physiology & Pharmacology, Institute of Biological Sciences, Federal University of Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - Akhtar Nadhman
- Institute of Integrative Biosciences, CECOS University of IT & Emerging Sciences, Peshawar, Pakistan
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17
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Bruch GE, Fernandes LF, Bassi BL, Alves MTR, Pereira IO, Frézard F, Massensini AR. Liposomes for drug delivery in stroke. Brain Res Bull 2019; 152:246-256. [DOI: 10.1016/j.brainresbull.2019.07.015] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2019] [Revised: 06/26/2019] [Accepted: 07/12/2019] [Indexed: 12/26/2022]
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18
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Lanza JS, Pomel S, Loiseau PM, Frézard F. Recent advances in amphotericin B delivery strategies for the treatment of leishmaniases. Expert Opin Drug Deliv 2019; 16:1063-1079. [DOI: 10.1080/17425247.2019.1659243] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Juliane S. Lanza
- Faculty of Pharmacy, Antiparasite Chemotherapy, UMR 8076 CNRS BioCIS, University Paris-Saclay, Chatenay-Malabry, France
| | - Sébastien Pomel
- Faculty of Pharmacy, Antiparasite Chemotherapy, UMR 8076 CNRS BioCIS, University Paris-Saclay, Chatenay-Malabry, France
| | - Philippe M. Loiseau
- Faculty of Pharmacy, Antiparasite Chemotherapy, UMR 8076 CNRS BioCIS, University Paris-Saclay, Chatenay-Malabry, France
| | - Frédéric Frézard
- Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
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Rugani JN, Gontijo CMF, Frézard F, Soares RP, do Monte-Neto RL. Antimony resistance in Leishmania (Viannia) braziliensis clinical isolates from atypical lesions associates with increased ARM56/ARM58 transcripts and reduced drug uptake. Mem Inst Oswaldo Cruz 2019; 114:e190111. [PMID: 31433006 PMCID: PMC6697410 DOI: 10.1590/0074-02760190111] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 07/12/2019] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND In addition to the limited therapeutic arsenal and the side effects of antileishmanial agents, drug resistance hinders disease control. In Brazil, Leishmania braziliensis causes atypical (AT) tegumentary leishmaniasis lesions, frequently refractory to treatment. OBJECTIVES The main goal of this study was to characterise antimony (Sb)-resistant (SbR) L. braziliensis strains obtained from patients living in Xakriabá indigenous community, Minas Gerais, Brazil. METHODS The aquaglyceroporin 1-encoding gene (AQP1) from L. braziliensis clinical isolates was sequenced, and its function was evaluated by hypo-osmotic shock. mRNA levels of genes associated with Sb resistance were measured by quantitative reverse transcription polymerase chain reaction (qRT-PCR). Atomic absorption was used to measure Sb uptake. FINDINGS Although clinical isolates presented delayed recovery time in hypo-osmotic shock, AQP1 function was maintained. Isolate 340 accumulated less Sb than all other isolates, supporting the 65-fold downregulation of AQP1 mRNA levels. Both 330 and 340 isolates upregulated antimony resistance marker (ARM) 56/ARM58 and multidrug resistant protein A (MRPA); however, only ARM58 upregulation was an exclusive feature of SbR field isolates. CA7AE seemed to increase drug uptake in L. braziliensis and represented a tool to study the role of glycoconjugates in Sb transport. MAIN CONCLUSIONS There is a clear correlation between ARM56/58 upregulation and Sb resistance in AT-harbouring patients, suggesting the use of these markers as potential indicators to help the treatment choice and outcome, preventing therapeutic failure.
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Affiliation(s)
| | | | - Frédéric Frézard
- Universidade Federal de Minas Gerais, Instituto de Ciências
Biológicas, Departamento de Fisiologia e Biofísica, Belo Horizonte, MG, Brasil
| | - Rodrigo Pedro Soares
- Fundação Oswaldo Cruz-Fiocruz, Instituto René Rachou, Belo
Horizonte, MG, Brasil
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20
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Carregal VM, Lanza JS, Souza DM, Islam A, Demicheli C, Fujiwara RT, Rivas L, Frézard F. Combination oral therapy against Leishmania amazonensis infection in BALB/c mice using nanoassemblies made from amphiphilic antimony(V) complex incorporating miltefosine. Parasitol Res 2019; 118:3077-3084. [DOI: 10.1007/s00436-019-06419-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Accepted: 08/02/2019] [Indexed: 11/27/2022]
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21
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de Paula RC, da Silva SM, Faria KF, Frézard F, Moreira CPDS, Foubert K, Lopes JCD, Campana PRV, Rocha MP, Silva AF, Silva CG, Pieters L, Almeida VL. In vitro antileishmanial activity of leaf and stem extracts of seven Brazilian plant species. J Ethnopharmacol 2019; 232:155-164. [PMID: 30580025 DOI: 10.1016/j.jep.2018.12.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 07/24/2018] [Revised: 12/10/2018] [Accepted: 12/16/2018] [Indexed: 06/09/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Leishmaniasis is a parasitic disease that affects people all over the world. The number of cases of leishmaniasis is increasing and the drugs used for its treatment are toxic and not always effective. The recognition of the global nature of this disease and its direct or indirect effects on health economics and actions focuses attention on the development of new therapeutic options. In Brazil, this parasitic disease is endemic in many regions. The plants used by the population against leishmaniasis can be good starting points in the search of new lead compounds for antileishmanial drugs. AIM OF THE STUDY The aim of the present study was to investigate the antileishmanial activity of extracts from leaves and stems of seven Brazilian plant species used by the population to treat leishmaniasis, and symptoms that might be related to Leishmania infections. MATERIALS AND METHODS Twenty two extracts from seven plants belonging to five different botanical families were prepared by different methods and evaluated for their effect on the viability of promastigote forms of Leishmania infantum (MHOM/BR/1967/BH46) using the resazurin-based colorimetric assay. The extracts were considered active when they inhibited the growth of promastigotes in a percentage greater than or equal to 50% at 100 and 200 µg/mL. The active samples were further investigated to determine IC50, CC50 and SI values against promastigote forms of L. infantum. The active and non-cytotoxic extracts (SI> 10) were evaluated against amastigote forms of L. infantum. In addition, the active extracts against the amastigote forms were analyzed by TLC and HPLC, while the EtOAc extract of stems from Aspidosperma tomentosum was also evaluated by GC/MS. RESULTS Among the twenty two extracts evaluated, two were considered active against L. infantum. The EtOH extract of leaves from Dyospiros hispida (IC50 55.48 ± 2.77 µg/mL and IC50 80.63 ± 13.17 µg/mL, respectively) and the EtOAc extract of stems from Aspidosperma tomentosum (IC50 9.70 ± 2.82 µg/mL and IC50 15.88 ± 1.53 µg/mL, respectively) inhibited significantly the growth of promastigote and amastigote forms of L. infantum. Some extracts, although active in the initial screening, were considered toxic since the SI was lower than 10. In TLC and HPLC analysis the leaf extract of Dyospiros hispida showed the presence of anthraquinones, terpenes and saponins, and in the EtOAc extract of stems from Aspidosperma tomentosum alkaloids and flavonoids were detected. In addition, in the latter extract the indole alkaloids uleine and dasycarpidone could be identified by GC/MS. CONCLUSIONS The ethnopharmacological data of Aspidosperma tomentosum and Dyospiros hispida in part support the results found in the biological models used. Extracts of Aspidosperma tomentosum and Dyospiros hispida presented promising results against L. infantum.
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Affiliation(s)
- Renata Cristina de Paula
- Laboratório de Bioensaios em Leishmania, ICBIM, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Sydnei Magno da Silva
- Laboratório de Bioensaios em Leishmania, ICBIM, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Karen Ferraz Faria
- Laboratório de Bioensaios em Leishmania, ICBIM, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Frédéric Frézard
- Departamento de Fisiologia e Biofísica, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | | | - Kenn Foubert
- Natural Products & Food Research and Analysis (NatuRA), University of Antwerp, Antwerp, Belgium
| | - Júlio César Dias Lopes
- Chemoinformatics Group (NEQUIM), Departamento de Química, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | | | - Marina Pereira Rocha
- Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | | | - Cláudia Gontijo Silva
- Serviço de Fitoquímica e Prospecção Farmacêutica, Fundação Ezequiel Dias, Belo Horizonte, MG, Brazil
| | - Luc Pieters
- Natural Products & Food Research and Analysis (NatuRA), University of Antwerp, Antwerp, Belgium
| | - Vera Lúcia Almeida
- Serviço de Fitoquímica e Prospecção Farmacêutica, Fundação Ezequiel Dias, Belo Horizonte, MG, Brazil.
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22
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Carvalho SH, Frézard F, Pereira NP, Moura AS, Ramos LMQC, Carvalho GB, Rocha MOC. American tegumentary leishmaniasis in Brazil: a critical review of the current therapeutic approach with systemic meglumine antimoniate and short‐term possibilities for an alternative treatment. Trop Med Int Health 2019; 24:380-391. [DOI: 10.1111/tmi.13210] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sílvia H. Carvalho
- Serviço de Doenças Infecciosas e Parasitárias Hospital Eduardo de Menezes Fundação Hospitalar do Estado de Minas Gerais Belo Horizonte, Minas Gerais Brazil
| | - Frédéric Frézard
- Departamento de Fisiologia e Biofísica Instituto de Ciências Biológicas Universidade Federal de Minas Gerais Belo Horizonte, Minas Gerais Brazil
| | - Neila P. Pereira
- Departamento do Medicamento Faculdade de Farmácia Universidade Federal da Bahia Salvador, Bahia Brazil
| | - Alexandre S. Moura
- Departamento de Medicina Universidade José do Rosário Vellano‐Unifenas Belo Horizonte, Minas Gerais Brazil
| | - Lucinéia M. Q. C. Ramos
- Serviço de Doenças Infecciosas e Parasitárias Hospital Eduardo de Menezes Fundação Hospitalar do Estado de Minas Gerais Belo Horizonte, Minas Gerais Brazil
| | - Gabriel B. Carvalho
- Escola Superior de Ciências da Santa Casa de Misericórdia de Vitória Vitória, Espírito Santo Brazil
| | - Manoel O. C. Rocha
- Departamento de Clínica Médica Faculdade de Medicina Universidade Federal de Minas Gerais Belo Horizonte, Minas Gerais Brazil
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23
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Fernandes LF, Bruch GE, Massensini AR, Frézard F. Recent Advances in the Therapeutic and Diagnostic Use of Liposomes and Carbon Nanomaterials in Ischemic Stroke. Front Neurosci 2018; 12:453. [PMID: 30026685 PMCID: PMC6041432 DOI: 10.3389/fnins.2018.00453] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [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: 04/28/2018] [Accepted: 06/13/2018] [Indexed: 12/11/2022] Open
Abstract
The complexity of the central nervous system (CNS), its limited self-repairing capacity and the ineffective delivery of most CNS drugs to the brain contribute to the irreversible and progressive nature of many neurological diseases and also the severity of the outcome. Therefore, neurological disorders belong to the group of pathologies with the greatest need of new technologies for diagnostics and therapeutics. In this scenario, nanotechnology has emerged with innovative and promising biomaterials and tools. This review focuses on ischemic stroke, being one of the major causes of death and serious long-term disabilities worldwide, and the recent advances in the study of liposomes and carbon nanomaterials for therapeutic and diagnostic purposes. Ischemic stroke occurs when blood flow to the brain is insufficient to meet metabolic demand, leading to a cascade of physiopathological events in the CNS including local blood brain barrier (BBB) disruption. However, to date, the only treatment approved by the FDA for this pathology is based on the potentially toxic tissue plasminogen activator. The techniques currently available for diagnosis of stroke also lack sensitivity. Liposomes and carbon nanomaterials were selected for comparison in this review, because of their very distinct characteristics and ranges of applications. Liposomes represent a biomimetic system, with composition, structural organization and properties very similar to biological membranes. On the other hand, carbon nanomaterials, which are not naturally encountered in the human body, exhibit new modes of interaction with biological molecules and systems, resulting in unique pharmacological properties. In the last years, several neuroprotective agents have been evaluated under the encapsulated form in liposomes, in experimental models of stroke. Effective drug delivery to the brain and neuroprotection were achieved using stealth liposomes bearing targeting ligands onto their surface for brain endothelial cells and ischemic tissues receptors. Carbon nanomaterials including nanotubes, fullerenes and graphene, started to be investigated and potential applications for therapy, biosensing and imaging have been identified based on their antioxidant action, their intrinsic photoluminescence, their ability to cross the BBB, transitorily decrease the BBB paracellular tightness, carry oligonucleotides and cells and induce cell differentiation. The potential future developments in the field are finally discussed.
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Affiliation(s)
| | | | - André R. Massensini
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Frédéric Frézard
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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24
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Fontes MAP, Vaz GC, Cardoso TZD, de Oliveira MF, Campagnole-Santos MJ, Dos Santos RAS, Sharma NM, Patel KP, Frézard F. GABA-containing liposomes: neuroscience applications and translational perspectives for targeting neurological diseases. Nanomedicine 2017; 14:781-788. [PMID: 29278747 DOI: 10.1016/j.nano.2017.12.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 11/27/2017] [Accepted: 12/10/2017] [Indexed: 11/28/2022]
Abstract
There are multiple challenges for neuropharmacology in the future. Undoubtedly, one of the greatest challenges is the development of strategies for pharmacological targeting of specific brain regions for treatment of diseases. GABA is the main inhibitory neurotransmitter in the central nervous system, and dysfunction of GABAergic mechanisms is associated with different neurological conditions. Liposomes are lipid vesicles that are able to encapsulate chemical compounds and are used for chronic drug delivery. This short review reports our experience with the development of liposomes for encapsulation and chronic delivery of GABA to sites within the brain. Directions for future research regarding the efficacy and practical use of GABA-containing liposomes for extended periods of time as well as understanding and targeting neurological conditions are discussed.
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Affiliation(s)
| | - Gisele Cristiane Vaz
- Department of Physiology & Biophysics, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | | | | | | | | | - Neeru M Sharma
- Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, Nebraska
| | - Kaushik P Patel
- Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, Nebraska
| | - Frédéric Frézard
- Department of Physiology & Biophysics, Federal University of Minas Gerais, Belo Horizonte, Brazil.
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25
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Dos Reis PG, do Monte-Neto RL, Melo MN, Frézard F. Biophysical and Pharmacological Characterization of Energy-Dependent Efflux of Sb in Laboratory-Selected Resistant Strains of Leishmania ( Viannia) Subgenus. Front Cell Dev Biol 2017; 5:24. [PMID: 28393067 PMCID: PMC5364148 DOI: 10.3389/fcell.2017.00024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2016] [Accepted: 03/07/2017] [Indexed: 12/02/2022] Open
Abstract
The growing resistance of leishmaniasis to first-line drugs like antimonials in some regions limits the control of this parasitic disease. The precise mechanisms involved in Leishmania antimony resistance are still subject to debate. The reduction of intracellular SbIII accumulation is a common change observed in both laboratory-selected and field isolated resistant Leishmania strains, but the exact transport pathways involved in antimony resistance have not yet been elucidated. In order to functionally characterize the antimony transport routes responsible for resistance, we performed systematic transport studies of SbIII in wild-type and resistant strains of L. (Viannia) guyanensis and L. (V.) braziliensis. Those include influx and efflux assays and the influence of ABC transporters and metabolism inhibitors: prochlorperazine, probenecid, verapamil, BSO, and sodium azide. The mRNA levels of genes associated with antimony resistance (MRPA, GSH1, ODC, AQP1, ABCI4, and ARM58) were also investigated in addition to intracellular thiol levels. A strong reduction of Sb influx was observed in L. guyanensis resistant mutant (LgSbR), but not in L. braziliensis (LbSbR). Both mutants showed increased energy-dependent efflux of SbIII, when compared to their respective parental strains. In LgSbR, BSO and prochlorperazine inhibited antimony efflux and resistance was associated with increased MRPA and GSH1 mRNA levels, while in LbSbR antimony efflux was inhibited by probenicid and prochlorperazine in absence of resistance-associated gene modulation. Intracellular thiol levels were increased in both Sb-resistant mutants. An energy-dependent SbIII efflux pathway sensitive to prochlorperazine was clearly evidenced in both Sb-resistant mutants. In conclusion, the present study allowed the biophysical and pharmacological characterization of energy-dependent Sb efflux pathway apparently independent of MRPA, ABCI4, and ARM58 upregulation, in Leishmania (Vianna) mutant selected in vitro for resistance to SbIII. Prochlorperazine has also been identified as an effective chemosensitizer in both Sb resistant mutants, which acts through inhibition of the active efflux of Sb.
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Affiliation(s)
- Priscila G Dos Reis
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas GeraisBelo Horizonte, Brazil; Departamento de Farmácia/Ensino e Pesquisa, Hospital João XXIII - Fundação Hospitalar do Estado de Minas GeraisBelo Horizonte, Brazil
| | - Rubens L do Monte-Neto
- Laboratório de Parasitologia Celular e Molecular, Centro de Pesquisas René Rachou - CPqRR/FIOCRUZ Belo Horizonte, Brazil
| | - Maria N Melo
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais Belo Horizonte, Brazil
| | - Frédéric Frézard
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais Belo Horizonte, Brazil
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26
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Lanza JS, Fernandes FR, Corrêa-Júnior JD, Vilela JM, Magalhães-Paniago R, Ferreira LA, Andrade MS, Demicheli C, Melo MN, Frézard F. Polarity-sensitive nanocarrier for oral delivery of Sb(V) and treatment of cutaneous leishmaniasis. Int J Nanomedicine 2016; 11:2305-18. [PMID: 27307731 PMCID: PMC4887043 DOI: 10.2147/ijn.s105952] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
There is a great need for orally active drugs for the treatment of the neglected tropical disease leishmaniasis. Amphiphilic Sb(V) complexes, such as 1:3 Sb–N-octanoyl-N-methylglucamide complex (SbL8), are promising drug candidates. It has been previously reported that SbL8 forms kinetically stabilized nanoassemblies in water and that this simple dispersion exhibits antileishmanial activity when given by oral route to a murine model of visceral leishmaniasis. The main objective of the present work was to interfere in the structural organization of these nanoassemblies so as to investigate their influence on the oral bioavailability of Sb, and ultimately, optimize an oral formulation of SbL8 for the treatment of cutaneous leishmaniasis. The structural organization of SbL8 nanoassemblies was manipulated through addition of propylene glycol (PG) to the aqueous dispersion of SbL8. The presence of 50% (v/v) PG resulted in the loss of hydrophobic microenvironment, as evidenced by fluorescence probing. However, nanostructures were still present, as demonstrated by dynamic light scattering, small-angle X-ray scattering, and atomic force microscopy (AFM). A remarkable property of these nanoassemblies, as revealed by AFM analysis, is the flexibility of their supramolecular organization, which showed changes as a function of the solvent and substrate polarities. The formulation of SbL8 in 1:1 water:PG given orally to mice promoted significantly higher and more sustained serum levels of Sb, when compared to SbL8 in water. The new formulation, when given as repeated doses (200 mg Sb/kg/day) to BALB/c mice infected with Leishmania amazonensis, was significantly more effective in reducing the lesion parasite burden, compared to SbL8 in water, and even, the conventional drug Glucantime® given intraperitoneally at the same dose. In conclusion, this work introduces a new concept of polarity-sensitive nanocarrier that was successfully applied to optimize an oral formulation of Sb(V) for treating cutaneous leishmaniasis.
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Affiliation(s)
- Juliane S Lanza
- Department of Physiology and Biophysics, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Flaviana R Fernandes
- Department of Physiology and Biophysics, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - José D Corrêa-Júnior
- Department of Morphology, Instituto de Ciências Biológicas (ICB), Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - José Mc Vilela
- Innovation and Technology Center SENAI FIEMG - Campus CETEC, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Rogério Magalhães-Paniago
- Department of Physics, Instituto de Ciências Exatas (ICEX), Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Lucas Am Ferreira
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Margareth S Andrade
- Innovation and Technology Center SENAI FIEMG - Campus CETEC, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Cynthia Demicheli
- Department of Chemistry, Instituto de Ciências Exatas (ICEX), Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Maria N Melo
- Department of Parasitology, Instituto de Ciências Biológicas (ICB), Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Frédéric Frézard
- Department of Physiology and Biophysics, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
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Islam A, Rodrigues BL, Marzano IM, Perreira-Maia EC, Dittz D, Paz Lopes MT, Ishfaq M, Frézard F, Demicheli C. Cytotoxicity and apoptotic activity of novel organobismuth(V) and organoantimony(V) complexes in different cancer cell lines. Eur J Med Chem 2016; 109:254-67. [DOI: 10.1016/j.ejmech.2016.01.003] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 01/02/2016] [Accepted: 01/05/2016] [Indexed: 01/20/2023]
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Silva SR, Duarte ÉC, Ramos GS, Kock FVC, Andrade FD, Frézard F, Colnago LA, Demicheli C. Gadolinium(III) Complexes with N-Alkyl-N-methylglucamine Surfactants Incorporated into Liposomes as Potential MRI Contrast Agents. Bioinorg Chem Appl 2015; 2015:942147. [PMID: 26347596 PMCID: PMC4546952 DOI: 10.1155/2015/942147] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 07/22/2015] [Accepted: 07/27/2015] [Indexed: 12/20/2022] Open
Abstract
Complexes of gadolinium(III) with N-octanoyl-N-methylglucamine (L8) and N-decanoyl-N-methylglucamine (L10) with 1 : 2 stoichiometry were synthesized and characterized by elemental analysis, electrospray ionization-tandem mass spectrometry (ESI-MS), infrared (IR) spectroscopy, and molar conductivity measurements. The transverse (r 2) and longitudinal (r 1) relaxivity protons were measured at 20 MHz and compared with those of the commercial contrasts. These complexes were incorporated in liposomes, resulting in the increase of the vesicle zeta potential. Both the free and liposome-incorporated gadolinium complexes showed high relaxation effectiveness, compared to commercial contrast agent gadopentetate dimeglumine (Magnevist). The high relaxivity of these complexes was attributed to the molecular rotation that occurs more slowly, because of the elevated molecular weight and incorporation in liposomes. The results establish that these paramagnetic complexes are highly potent contrast agents, making them excellent candidates for various applications in molecular MR imaging.
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Affiliation(s)
- Simone Rodrigues Silva
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil
| | - Érica Correia Duarte
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil
| | - Guilherme Santos Ramos
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil
| | | | - Fabiana Diuk Andrade
- Embrapa Instrumentação, Empresa Brasileira de Pesquisa Agropecuária, 13560-970 São Carlos, SP, Brazil
| | - Frédéric Frézard
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil
| | - Luiz Alberto Colnago
- Embrapa Instrumentação, Empresa Brasileira de Pesquisa Agropecuária, 13560-970 São Carlos, SP, Brazil
| | - Cynthia Demicheli
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil
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Monte-Neto R, Laffitte MCN, Leprohon P, Reis P, Frézard F, Ouellette M. Intrachromosomal amplification, locus deletion and point mutation in the aquaglyceroporin AQP1 gene in antimony resistant Leishmania (Viannia) guyanensis. PLoS Negl Trop Dis 2015; 9:e0003476. [PMID: 25679388 PMCID: PMC4332685 DOI: 10.1371/journal.pntd.0003476] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Accepted: 12/14/2014] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Antimony resistance complicates the treatment of infections caused by the parasite Leishmania. METHODOLOGY/PRINCIPAL FINDINGS Using next generation sequencing, we sequenced the genome of four independent Leishmania guyanensis antimony-resistant (SbR) mutants and found different chromosomal alterations including aneuploidy, intrachromosomal gene amplification and gene deletion. A segment covering 30 genes on chromosome 19 was amplified intrachromosomally in three of the four mutants. The gene coding for the multidrug resistance associated protein A involved in antimony resistance was also amplified in the four mutants, most likely through chromosomal translocation. All mutants also displayed a reduced accumulation of antimony mainly due to genomic alterations at the level of the subtelomeric region of chromosome 31 harboring the gene coding for the aquaglyceroporin 1 (LgAQP1). Resistance involved the loss of LgAQP1 through subtelomeric deletions in three mutants. Interestingly, the fourth mutant harbored a single G133D point mutation in LgAQP1 whose role in resistance was functionality confirmed through drug sensitivity and antimony accumulation assays. In contrast to the Leishmania subspecies that resort to extrachromosomal amplification, the Viannia strains studied here used intrachromosomal amplification and locus deletion. CONCLUSIONS/SIGNIFICANCE This is the first report of a naturally occurred point mutation in AQP1 in antimony resistant parasites.
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Affiliation(s)
- Rubens Monte-Neto
- Centre de Recherche en Infectiologie du Centre de Recherche du CHU Québec and Département de Microbiologie, Infectiologie et Immunologie, Faculté de Médecine, Université Laval, Québec, Québec, Canada
| | - Marie-Claude N. Laffitte
- Centre de Recherche en Infectiologie du Centre de Recherche du CHU Québec and Département de Microbiologie, Infectiologie et Immunologie, Faculté de Médecine, Université Laval, Québec, Québec, Canada
| | - Philippe Leprohon
- Centre de Recherche en Infectiologie du Centre de Recherche du CHU Québec and Département de Microbiologie, Infectiologie et Immunologie, Faculté de Médecine, Université Laval, Québec, Québec, Canada
| | - Priscila Reis
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brasil
| | - Frédéric Frézard
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brasil
| | - Marc Ouellette
- Centre de Recherche en Infectiologie du Centre de Recherche du CHU Québec and Département de Microbiologie, Infectiologie et Immunologie, Faculté de Médecine, Université Laval, Québec, Québec, Canada
- * E-mail:
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Caldeira LR, Fernandes FR, Costa DF, Frézard F, Afonso LCC, Ferreira LAM. Nanoemulsions loaded with amphotericin B: a new approach for the treatment of leishmaniasis. Eur J Pharm Sci 2015; 70:125-31. [PMID: 25660615 DOI: 10.1016/j.ejps.2015.01.015] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Revised: 01/07/2015] [Accepted: 01/27/2015] [Indexed: 10/24/2022]
Abstract
This work aimed to develop nanoemulsions (NE) containing cholesterol and Amphotericin B (AmB) evaluating the influence of a lipophilic amine (stearylamine; STE) on drug encapsulation efficiency (EE), cytotoxicity on macrophages and in vitro antileishmanial activity. The EE of AmB in NE was nearly 100% regardless of STE concentration. Stability studies showed that AmB-loaded NE with or without STE were stable revealing that AmB content and EE remained constant after 180days. In significant contrast, the EE for AmB in NE without cholesterol drastically decreased showing that this co-surfactant significantly improved the retention of drug in NE. The electronic absorption and circular dichroism (CD) data revealed that the signal characteristic of self-associated free AmB, the most toxic form to the host cells, was virtually absent in the spectra of AmB-loaded NE. In agreement, NE-induced toxicity toward macrophages was significantly lower than that observed for the conventional AmB. STE enhanced both cytotoxicity and the activity against intracellular amastigotes of AmB-loaded NE. However, selectivity index values for AmB-loaded NE were considerably higher than that observed for conventional AmB. AmB-loaded and cholesterol-stabilized NE constitutes an attractive alternative for the treatment of leishmaniasis.
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Affiliation(s)
- Leila Rodrigues Caldeira
- Department of Pharmaceutics, Faculty of Pharmacy, Federal University of Minas Gerais (UFMG), Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Flaviana Ribeiro Fernandes
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais (UFMG), Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Daniel Ferreira Costa
- Department of Pharmaceutics, Faculty of Pharmacy, Federal University of Minas Gerais (UFMG), Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Frédéric Frézard
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais (UFMG), Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Luís Carlos Crocco Afonso
- Department of Biological Sciences, Institute of Biological and Exact Sciences, Federal University of Ouro Preto (UFOP), Morro do Cruzeiro, 35400-000 Ouro Preto, Minas Gerais, Brazil
| | - Lucas Antônio Miranda Ferreira
- Department of Pharmaceutics, Faculty of Pharmacy, Federal University of Minas Gerais (UFMG), Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil.
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Castro RAO, Silva-Barcellos NM, Licio CSA, Souza JB, Souza-Testasicca MC, Ferreira FM, Batista MA, Silveira-Lemos D, Moura SL, Frézard F, Rezende SA. Association of liposome-encapsulated trivalent antimonial with ascorbic acid: an effective and safe strategy in the treatment of experimental visceral leishmaniasis. PLoS One 2014; 9:e104055. [PMID: 25105501 PMCID: PMC4126701 DOI: 10.1371/journal.pone.0104055] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Accepted: 07/05/2014] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Visceral leishmaniasis (VL) is a chronic debilitating disease endemic in tropical and subtropical areas, caused by protozoan parasites of the genus Leishmania. Annually, it is estimated the occurrence of 0.2 to 0.4 million new cases of the disease worldwide. Considering the lack of an effective vaccine the afflicted population must rely on both, an accurate diagnosis and successful treatment to combat the disease. Here we propose to evaluate the efficacy of trivalent antimonial encapsulated in conventional liposomes, in association with ascorbic acid, by monitoring its toxicity and efficacy in BALB/c mice infected with Leishmania infantum. METHODOLOGY/PRINCIPAL FINDINGS Infected mice were subjected to single-dose treatments consisting in the administration of either free or liposome-encapsulated trivalent antimony (SbIII), in association or not with ascorbic acid. Parasite burden was assessed in the liver, spleen and bone marrow using the serial limiting dilution technique. After treatment, tissue alterations were examined by histopathology of liver, heart and kidney and confirmed by serum levels of classic biomarkers. The phenotypic profile of splenocytes was also investigated by flow cytometry. Treatment with liposome-encapsulated SbIII significantly reduced the parasite burden in the liver, spleen and bone marrow. Co-administration of ascorbic acid, with either free SbIII or its liposomal form, did not interfere with its leishmanicidal activity and promoted reduced toxicity particularly to the kidney and liver tissues. CONCLUSIONS/SIGNIFICANCE Among the evaluated posological regimens treatment of L. infantum-infected mice with liposomal SbIII, in association with ascorbic acid, represented the best alternative as judged by its high leishmanicidal activity and absence of detectable toxic effects. Of particular importance, reduction of parasite burden in the bone marrow attested to the ability of SbIII-carrying liposomes to efficiently reach this body compartment.
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Affiliation(s)
- Renata A. O. Castro
- Programa de Pós-Graduação em Ciências Farmacêuticas – Cipharma, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brasil
| | - Neila M. Silva-Barcellos
- Programa de Pós-Graduação em Ciências Farmacêuticas – Cipharma, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brasil
| | - Carolina S. A. Licio
- Programa de Pós-Graduação em Ciências Farmacêuticas – Cipharma, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brasil
| | - Janine B. Souza
- Programa de Pós-Graduação em Ciências Farmacêuticas – Cipharma, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brasil
| | - Míriam C. Souza-Testasicca
- Coordenadoria da Área de Ciências Biológicas, Instituto Federal de Minas Gerais - Campus Ouro Preto, Ouro Preto, Minas Gerais, Brasil
| | - Flávia M. Ferreira
- Programa de Pós-Graduação em Ciências Farmacêuticas – Cipharma, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brasil
| | - Mauricio A. Batista
- Programa de Pós-Graduação em Ciências Biológicas – NUPEB, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brasil
| | - Denise Silveira-Lemos
- Programa de Pós-Graduação em Ciências Biológicas – NUPEB, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brasil
| | - Sandra L. Moura
- Programa de Pós-Graduação em Ciências Biológicas – NUPEB, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brasil
| | - Frédéric Frézard
- Departamento de Fisiologia e Biofísica, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brasil
| | - Simone A. Rezende
- Programa de Pós-Graduação em Ciências Farmacêuticas – Cipharma, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brasil
- * E-mail:
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Azevedo EG, Ribeiro RR, da Silva SM, Ferreira CS, de Souza LE, Ferreira AAF, de Oliveira e Castro RA, Demicheli C, Rezende SA, Frézard F. Mixed formulation of conventional and pegylated liposomes as a novel drug delivery strategy for improved treatment of visceral leishmaniasis. Expert Opin Drug Deliv 2014; 11:1551-60. [DOI: 10.1517/17425247.2014.932347] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Islam A, Da Silva JG, Berbet FM, da Silva SM, Rodrigues BL, Beraldo H, Melo MN, Frézard F, Demicheli C. Novel triphenylantimony(V) and triphenylbismuth(V) complexes with benzoic acid derivatives: structural characterization, in vitro antileishmanial and antibacterial activities and cytotoxicity against macrophages. Molecules 2014; 19:6009-30. [PMID: 24824136 PMCID: PMC6271143 DOI: 10.3390/molecules19056009] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Revised: 04/30/2014] [Accepted: 05/05/2014] [Indexed: 12/02/2022] Open
Abstract
Two novel organoantimony(V) and two organobismuth(V) complexes of the type ML2 were synthesized, with L = acetylsalicylic acid (HL1) or 3-acetoxybenzoic acid (HL2) and M = triphenylantimony(V) (M1) or triphenylbismuth(V) (M2). Complexes, [M1(L1)2] (1), [M1(L2)2]∙CHCl3 (2), [M2(L1)2], (3) and [M2(L2)2] (4), were characterized by elemental analysis, IR and NMR. Crystal structures of triphenylantimony(V) dicarboxylate complexes 1 and 2 were determined by single crystal X-ray diffraction. Structural analyses revealed that 1 and 2 adopt five-coordinated extremely distorted trigonal bipyramidal geometries, binding with three phenyl groups in the equatorial position and two deprotonated organic ligands (L) in the axial sites. The metal complexes, their metal salts and ligands were evaluated in vitro for their activities against Leishmania infantum and amazonensis promastigotes and Staphylococcus aureus and Pseudomonas aeruginosa bacteria. Both the metal complexes showed antileishmanial and antibacterial activities but the bismuth complexes were the most active. Intriguingly, complexation of organobismuth(V) salt reduced its activity against Leishmania, but increased it against bacteria. In vitro cytotoxic test of these complexes against murine macrophages showed that antimony(V) complexes were the least toxic. Considering the selectivity indexes, organoantimony(V) complexes emerge as the most promising antileishmanial agents and organobismuth(V) complex 3 as the best antibacterial agent.
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Affiliation(s)
- Arshad Islam
- Department of Chemistry, Institute of Exact Sciences, Federal University of Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil.
| | - Jeferson Gomes Da Silva
- Department of Pharmacy, Federal University of Juiz de Fora (UFJF), Campus Governador Valadares, Av. Dr. Raimundo Monteiro de Rezende, 330, Centro, 35010-177 Governador Valadares, MG, Brazil.
| | - Filipe Moan Berbet
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil.
| | - Sydnei Magno da Silva
- Laboratory of Parasitology, Institute of Biomedical Sciences, Federal University of Uberlândia (UFU), Av Amazonas, s/n, , 38400-902 Uberlândia, Minas Gerais, Brazil.
| | - Bernardo Lages Rodrigues
- Department of Chemistry, Institute of Exact Sciences, Federal University of Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil.
| | - Heloisa Beraldo
- Department of Chemistry, Institute of Exact Sciences, Federal University of Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil.
| | - Maria Norma Melo
- Department of Parasitology, Institute of Biological Sciences, Federal University of Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil.
| | - Frédéric Frézard
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil.
| | - Cynthia Demicheli
- Department of Chemistry, Institute of Exact Sciences, Federal University of Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil.
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Ferreira WA, Islam A, Andrade APS, Fernandes FR, Frézard F, Demicheli C. Mixed antimony(V) complexes with different sugars to modulate the oral bioavailability of pentavalent antimonial drugs. Molecules 2014; 19:5478-89. [PMID: 24786687 PMCID: PMC6270655 DOI: 10.3390/molecules19055478] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 04/15/2014] [Accepted: 04/24/2014] [Indexed: 11/16/2022] Open
Abstract
Previous studies have shown that the association of the drug meglumine antimoniate (MA) with β-cyclodextrin can improve its bioavailability by the oral route. In this work, ribose and maltose were investigated for their ability to form mixed or association complexes with MA, release MA and modulate the serum levels of Sb after oral administration in mice. Analysis of the MA/ribose composition by high performance liquid chromatography coupled to mass spectrometry (LCMS-IT-TOF) revealed the presence of mixed meglumine-Sb-ribose and Sb-ribose complexes. Analysis of the MA/maltose composition suggested the formation of MA-maltose association compounds. Circular dichroism characterization of these compositions following dilution in water at 37 °C suggested a partial and slow dissociation of the association compounds. When the MA/ribose composition was administered orally and compared to MA, the serum concentration of Sb was significantly lower after 1 h and greater after 3 h. On the other hand, the MA/maltose composition showed similar serum Sb concentration after 1 h and higher level of Sb after 3 h, when compared to MA. In conclusion, the present study has demonstrated the formation of mixed or association complexes of MA with sugars, such as maltose and ribose, which promoted sustained serum level of Sb after oral administration.
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Affiliation(s)
- Weverson A Ferreira
- Department of Chemistry, Institute of Exact Sciences - Federal University of Minas Gerais (UFMG), Av. Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil
| | - Arshad Islam
- Department of Chemistry, Institute of Exact Sciences - Federal University of Minas Gerais (UFMG), Av. Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil
| | - Aretha Priscilla S Andrade
- Department of Chemistry, Institute of Exact Sciences - Federal University of Minas Gerais (UFMG), Av. Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil
| | - Flaviana R Fernandes
- Department of Physiology and Biophysics, Institute of Biological Sciences - Federal University of Minas Gerais (UFMG), Av. Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil
| | - Frédéric Frézard
- Department of Physiology and Biophysics, Institute of Biological Sciences - Federal University of Minas Gerais (UFMG), Av. Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil
| | - Cynthia Demicheli
- Department of Chemistry, Institute of Exact Sciences - Federal University of Minas Gerais (UFMG), Av. Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil.
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Lizarazo-Jaimes EH, Reis PG, Bezerra FM, Rodrigues BL, Monte-Neto RL, Melo MN, Frézard F, Demicheli C. Complexes of different nitrogen donor heterocyclic ligands with SbCl3 and PhSbCl2 as potential antileishmanial agents against SbIII-sensitive and -resistant parasites. J Inorg Biochem 2014; 132:30-6. [DOI: 10.1016/j.jinorgbio.2013.12.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2013] [Revised: 12/06/2013] [Accepted: 12/10/2013] [Indexed: 11/29/2022]
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Frézard F, Monte-Neto R, Reis PG. Antimony transport mechanisms in resistant leishmania parasites. Biophys Rev 2014; 6:119-132. [PMID: 28509965 DOI: 10.1007/s12551-013-0134-y] [Citation(s) in RCA: 33] [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: 07/26/2013] [Accepted: 12/05/2013] [Indexed: 11/26/2022] Open
Abstract
Antimonial compounds have been used for more than a century in the treatment of the parasitic disease leishmaniasis. Although pentavalent antimonials are still first-line drugs in several developing countries, this class of drugs is no longer recommended in the Indian sub-continent because of the emergence of drug resistance. The precise mechanisms involved in the resistance of leishmania parasites to antimony are still subject to debate. It is now well documented that drug resistance in leishmania parasites is a multifactorial phenomenon involving multiple genes whose expression pattern synergistically leads to the resistance phenotype. The reduction of intracellular antimony accumulation is a frequent change observed in resistant leishmania cells; however, no comprehensive transport model has been presented so far to explain this change and its contribution to Leishmania resistance. The present review firstly covers the actual knowledge on the metabolism of antimonial drugs, the mechanisms of their transmembrane transport and intracellular processing in Leishmania. It further describes both the functional and molecular changes associated with Sb resistance in this organism. Possible transport models based on the actual knowledge are then presented, as well as their functional implications. Biophysical and pharmacological strategies are finally proposed for the precise identification of the transport pathways.
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Affiliation(s)
- Frédéric Frézard
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, Pampulha, 31270-901, Belo Horizonte, Minas Gerais, Brazil.
| | - Rubens Monte-Neto
- Centre de Recherche en Infectiologie du Centre Hospitalier de l'Université Laval, 2705, Boulevard Laurier, RC-709, G1V 4G2, Québec, QC, Canada
| | - Priscila G Reis
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, Pampulha, 31270-901, Belo Horizonte, Minas Gerais, Brazil
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Moreira DS, Monte Neto RL, Andrade JM, Santi AMM, Reis PG, Frézard F, Murta SM. Molecular characterization of the MRPA transporter and antimony uptake in four New World Leishmania spp. susceptible and resistant to antimony. Int J Parasitol Drugs Drug Resist 2013; 3:143-53. [PMID: 24533304 PMCID: PMC3862441 DOI: 10.1016/j.ijpddr.2013.08.001] [Citation(s) in RCA: 28] [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] [Subscribe] [Scholar Register] [Received: 09/29/2012] [Revised: 08/20/2013] [Accepted: 08/21/2013] [Indexed: 11/25/2022]
Abstract
Level of expression of Pgp is increased in the SbIII-resistant L. guyanensis and L. amazonensis lines. Incorporation of antimony was reduced in the SbIII-resistant L. guyanensis, L. amazonensis and L. braziliensis lines. Down-regulation of AQP1 protein was observed in the SbIII-resistant L. guyanensis and L. amazonensis lines. Rates of SbIII efflux are higher in the SbIII-resistant lines of L. guyanensis and L. braziliensis. Mechanisms of antimony-resistance of the MRPA gene are different among species of Leishmania analyzed.
ATP-binding cassette (ABC) transporters have been associated with drug resistance in various diseases. The MRPA gene, a transporter of ABCC subfamily, is involved in the resistance by sequestering metal-thiol conjugates in intracellular vesicles of Leishmania parasite. In this study, we performed the molecular characterization of the MRPA transporter, analysis of P-glycoprotein (Pgp) and aquaglyceroporin-1 (AQP1) expression, and determination of antimony level in antimony-susceptible and -resistant lines of L. (V.) guyanensis, L. (L.) amazonensis, L. (V.) braziliensis and L. (L.) infantum. PFGE analysis revealed an association of chromosomal amplification of MRPA gene with the drug resistance phenotype in all SbIII-resistant Leishmania lines analyzed. Levels of mRNA from MRPA gene determined by real-time quantitative RT-PCR showed an increased expression of two fold in SbIII-resistant lines of Leishmania guyanensis, Leishmania amazonensis and Leishmania braziliensis. Western blot analysis revealed that Pgp is increased in the SbIII-resistant L. guyanensis and L. amazonensis lines. The intracellular level of antimony quantified by graphite furnace atomic absorption spectrometry showed a reduction in the accumulation of this element in SbIII-resistant L. guyanensis, L. amazonensis and L. braziliensis lines when compared to their susceptible counterparts. Interestingly, a down-regulation of AQP1 protein was observed in the SbIII-resistant L. guyanensis and L. amazonensis lines, contributing for decreasing of SbIII entry in these lines. In addition, efflux experiments revealed that the rates of SbIII efflux are higher in the SbIII-resistant lines of L. guyanensis and L. braziliensis, that may explain also the low SbIII concentration within of these parasites. The BSO, an inhibitor of γ-glutamylcysteine synthetase enzyme, reversed the SbIII-resistance phenotype of L. braziliensis and caused an increasing in the Sb intracellular level in the LbSbR line. Our data indicate that the mechanisms of antimony-resistance are different among species of Leishmania analyzed in this study.
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Key Words
- AQP1, aquaglyceroporin-1
- Drug resistance
- La, L. (L.) amazonensis
- Lb, L. (V.) braziliensis
- Leishmania spp.
- Lg, L. (V.) guyanensis
- Li, L. (L.) infantum
- MRPA transporter
- MRPA, multidrug-resistance protein A
- Pgp, phosphoglycoprotein
- Potassium antimonyl tartrate
- SbIII, potassium antimonyl tartrate
- SbR, SbIII-resistant
- WTS, Wild-type susceptible
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Affiliation(s)
- Douglas S. Moreira
- Laboratório de Parasitologia Celular e Molecular, Centro de Pesquisas René Rachou – CPqRR/FIOCRUZ, Belo Horizonte 30190-002, Minas Gerais, Brazil
| | - Rubens L. Monte Neto
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil
- Centre de Recherche en Infectiologie, CHUL, Québec G1V 4G2, QC, Canada
| | - Juvana M. Andrade
- Laboratório de Parasitologia Celular e Molecular, Centro de Pesquisas René Rachou – CPqRR/FIOCRUZ, Belo Horizonte 30190-002, Minas Gerais, Brazil
| | - Ana Maria M. Santi
- Laboratório de Parasitologia Celular e Molecular, Centro de Pesquisas René Rachou – CPqRR/FIOCRUZ, Belo Horizonte 30190-002, Minas Gerais, Brazil
| | - Priscila G. Reis
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil
| | - Frédéric Frézard
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil
| | - Silvane M.F. Murta
- Laboratório de Parasitologia Celular e Molecular, Centro de Pesquisas René Rachou – CPqRR/FIOCRUZ, Belo Horizonte 30190-002, Minas Gerais, Brazil
- Corresponding author. Address: Laboratório de Parasitologia Celular e Molecular, Centro de Pesquisas ‘René Rachou’, FIOCRUZ, Av. Augusto de Lima 1715, Caixa Postal 1743, CEP 30190-002 Belo Horizonte, MG, Brazil. Tel.: +55 31 3349 7780; fax: +55 31 32953115.
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Ribeiro RR, Moura EP, Sampaio WM, Silva SM, Fulgêncio GO, Tafuri WL, Michalick MS, Frézard F. Complement activation-related pseudoallergy in dogs following intravenous administration of a liposomal formulation of meglumine antimoniate. Pesq Vet Bras 2013. [DOI: 10.1590/s0100-736x2013000800012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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
The increasing use of nanotechnologies in advanced therapies has allowed the observation of specific adverse reactions related to nanostructures. The toxicity of a novel liposome formulation of meglumine antimoniate in dogs with visceral leishmaniasis after single dose has been investigated. Groups of 12 animals received by the intravenous route a single dose of liposomal meglumine antimoniate (group I [GI], 6.5 mg Sb/kg), empty liposomes (GII) or isotonic saline (GIII). Evaluation of hematological and biochemical parameters showed no significant changes 4 days after administration. No undesired effects were registered in the GIII. However, adverse reactions were observed in 67.7% of dogs from both groups that received liposomal formulations. The side effects began moments after bolus administration and disappeared during the first 15 minutes after treatment. Prostation, sialorrhea and defecation were the most frequent clinical signs, registered in 33.3% and 41.6 % of animals from the groups GI and GII, respectively. Tachypnea, mydriasis, miosis, vomiting and cyanosis were also registered in both groups. The adverse reactions observed in this study were attributed to the activation of the complement system by lipid vesicles in a phenomenon known as Complement Activation-Related Pseudoallergy (CARPA). The influence of the physical-chemical characteristics of liposomal formulation in the triggering of CARPA is discussed.
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Almeida-Campos FR, Castro-Gomes T, Machado-Silva A, de Oliveira JS, Santoro MM, Frézard F, Horta MF. Activation of Leishmania spp. leishporin: evidence that dissociation of an inhibitor not only improves its lipid-binding efficiency but also endows it with the ability to form pores. Parasitol Res 2013; 112:3305-14. [PMID: 23812644 DOI: 10.1007/s00436-013-3510-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Accepted: 06/14/2013] [Indexed: 11/29/2022]
Abstract
We have previously shown that various species of Leishmania produce a lytic activity, which, in Leishmania amazonensis, is mediated by a pore-forming cytolysin, called leishporin. It is toxic for macrophages in vitro and optimally active at pH 5.0 to 5.5 and at 37 °C, suggesting that it might be active inside phagolysosomes. Leishporin from both L. amazonensis (a-leishporin) and Leishmania guyanensis (g-leishporin) can be activated by proteases, suggesting either a limited proteolysis of an inactive precursor or a proteolytic degradation of a non-covalently linked inhibitor. Here, we show that both a- and g-leishporin are also activated in dissociating conditions, indicating the second hypothesis as the correct one. In fact, we further demonstrated that inactive leishporin is non-covalently associated with an inhibitor, possibly more than one oligopeptide that, when removed, renders leishporin hemolytically active. This activation was shown to be the result of both the improvement of leishporin's ability to bind to phospholipids and the emergence of its pore-forming ability. In vitro results demonstrate that leishporin can be released by the parasites, as they evolve in axenic cultures, in an inactive form that can be activated. These results are compatible with our hypothesis that leishporin can be activated in the protease-rich, low pH, and dissociating environment of parasitophorous vacuoles, leading to disruption of both vacuoles and plasma membranes with the release of amastigotes.
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Affiliation(s)
- Flávia Regina Almeida-Campos
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901, Belo Horizonte, MG, Brazil
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Guimarães TT, Pinto MDCF, Lanza JS, Melo MN, do Monte-Neto RL, de Melo IM, Diogo EB, Ferreira VF, Camara CA, Valença WO, de Oliveira RN, Frézard F, da Silva Júnior EN. Potent naphthoquinones against antimony-sensitive and -resistant Leishmania parasites: Synthesis of novel α- and nor-α-lapachone-based 1,2,3-triazoles by copper-catalyzed azide–alkyne cycloaddition. Eur J Med Chem 2013; 63:523-30. [DOI: 10.1016/j.ejmech.2013.02.038] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2013] [Revised: 02/24/2013] [Accepted: 02/26/2013] [Indexed: 12/29/2022]
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Frézard F, Demicheli C, Kato KC, Reis PG, Lizarazo-Jaimes EH. Chemistry of antimony-based drugs in biological systems and studies of their mechanism of action. REV INORG CHEM 2013. [DOI: 10.1515/revic-2012-0006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
AbstractAntimonial drugs have been used for a century in the therapy of the parasitic disease leishmaniasis. Even though pentavalent antimonials are still first-line drugs, they exhibit several limitations, including severe side effects, the need for daily parenteral administration and drug resistance. The molecular structure of pentavalent antimonials, their metabolism and mechanism of action, are still being investigated. Previous studies suggest that pentavalent antimony acts as a prodrug which is converted to the active and more toxic trivalent antimony. Other works support the direct involvement of pentavalent antimony. Recent data indicate that thiols and ribose-containing biomolecules may mediate the pharmacological action of these drugs. Trypanothione reductase and zinc-finger proteins were identified as possible molecular targets. This review summarizes the progress achieved to date on the chemistry of antimonial drugs in biological systems.
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Affiliation(s)
- Frédéric Frézard
- 1Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Pampulha, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Cynthia Demicheli
- 2Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Pampulha, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Kelly C. Kato
- 1Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Pampulha, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Priscila G. Reis
- 1Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Pampulha, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Edgar H. Lizarazo-Jaimes
- 2Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Pampulha, 31270-901 Belo Horizonte, Minas Gerais, Brazil
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Salaün P, Frézard F. Unexpectedly high levels of antimony (III) in the pentavalent antimonial drug Glucantime: insights from a new voltammetric approach. Anal Bioanal Chem 2013; 405:5201-14. [PMID: 23612869 DOI: 10.1007/s00216-013-6947-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Revised: 03/20/2013] [Accepted: 03/25/2013] [Indexed: 11/30/2022]
Abstract
Glucantime, a pentavalent antimonial drug, is commonly used for the treatment of leishmaniasis but the presence of residual trivalent antimony, Sb(III), is thought to be responsible for toxic side-effects observed in patients. Numerous analytical studies have focused on determining Sb(III) concentrations in Glucantime but without reaching a consensus: results span over 3 orders of magnitude. In this study, we present a detailed new analytical approach showing that: (1) Sb(III) levels are much higher than previously reported and represent more than 30% of total Sb; (2) determination of Sb(III) concentrations in acidic conditions is hampered by fast oxidation rates. This latter point explains the large variations in previously reported results of Sb(III) concentrations in Glucantime. Measurements were made here at a vibrated gold microwire electrode by stripping voltammetry enabling measurement of Sb(III) in acidic, neutral or alkaline conditions. The developed methods are sensitive (e.g., detection limits of 19 pM for 120 s deposition at pH 4.5), stable (<6%, N = 100), precise (5%, N = 5) and robust (same electrode used for weeks) at all pH values. In diluted solutions of Glucantime, Sb(III) levels were strongly dependent both on pH and ionic strength. At pH < 3, Sb(III) is oxidized with oxidation rates that increase as pH is decreased. At high pH, Sb(III) forms electro-inactive complexes. Highest Sb(III) levels were detected at pH ~3 and at low ionic strength. The presence of several Sb(III) and Sb(V) species was demonstrated by different reduction waves obtained by stripping scanned voltammetry. As an implication of these unexpectedly high Sb(III) concentrations, an alternative model can be proposed for the mode of action of pentavalent antimonials against leishmaniasis, in which antimony complexes may act as molecular carrier of Sb(III) and release it specifically in the acidic intracellular compartment where the Leishmania parasites reside.
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Affiliation(s)
- Pascal Salaün
- School of Environmental Sciences, University of Liverpool, 4 Brownlow Street, Liverpool L69 3GP, UK.
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Silva H, Frézard F, Peterson EJ, Kabolizadeh P, Ryan JJ, Farrell NP. Heparan sulfate proteoglycan-mediated entry pathway for charged tri-platinum compounds: differential cellular accumulation mechanisms for platinum. Mol Pharm 2012; 9:1795-802. [PMID: 22494465 DOI: 10.1021/mp300098t] [Citation(s) in RCA: 31] [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: 01/07/2023]
Abstract
We examined the mechanism of accumulation of charged polynuclear platinum complexes (PPCs) based on analogy of polyarginine interactions with the cell surface heparan sulfate proteoglycan (HSPG) family of protein-linked glycosoaminoglycan polysaccharides (GAGs). GAGS such as heparan sulfate (HS) and chondroitin sulfate (CS) mediate the cellular entry of many charged molecules. Fluorescence microscopy and flow cytometry showed that PPCs, but not the neutral cisplatin or oxaliplatin, blocked the cellular entry of TAMRA-R(9) (a nonarginine peptide, R(9)) coupled to the TAMRA fluorescent label 5-(and 6-)carboxytetramethylrhodamine) in Chinese hamster ovary (CHO), human colon carcinoma (HCT116), and osteosarcoma (SAOS-2) cells. Furthermore, detection of platinum accumulation in wt CHO, mutant CHO-pgsD-677 (lacking HS), and CHO-pgsA (lacking HS/CS) cells confirms that HSPG-mediated interactions are an important mechanism for PPC internalization but not so for uncharged cisplatin and oxaliplatin. Endocytosis inhibitor studies show that macropinocytosis, a mechanism of cell entry for heparan sulfate GAGs and arginine-rich peptides, is important in the cellular accumulation of noncovalent TriplatinNC and, to a lesser degree, the covalently binding BBR3464. Clathrin-mediated endocytosis, however, was not involved in either case. Overall, the results suggest a new proteoglycan-mediated mechanism for cellular accumulation of PPCs not shared by cisplatin or oxaliplatin. The results have significant implications for the rational design of platinum antitumor drugs with distinct biological profiles in comparison to those of the clinically used agents as well as expanding the chemotypes for HS proteoglycan-dependent receptors.
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Affiliation(s)
- Heveline Silva
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
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Frézard F, Silva H, Pimenta AMDC, Farrell N, Demicheli C. Greater binding affinity of trivalent antimony to a CCCH zinc finger domain compared to a CCHC domain of kinetoplastid proteins. Metallomics 2012; 4:433-40. [DOI: 10.1039/c2mt00176d] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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de Oliveira LG, Silva MM, de Paula FCS, Pereira-Maia EC, Donnici CL, de Simone CA, Frézard F, Júnior ENDS, Demicheli C. Antimony(V) and bismuth(V) complexes of lapachol: synthesis, crystal structure and cytotoxic activity. Molecules 2011; 16:10314-23. [PMID: 22158684 PMCID: PMC6264574 DOI: 10.3390/molecules161210314] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Revised: 12/01/2011] [Accepted: 12/05/2011] [Indexed: 01/07/2023]
Abstract
Antimony(V) and bismuth(V) complexes of lapachol have been synthesized by the reaction of Ph₃SbCl₂ or Ph₃BiCl₂ with lapachol (Lp) and characterized by several physicochemical techniques such as IR, and NMR spectroscopy and X-ray crystallography. The compounds contain six-coordinated antimony and bismuth atoms. The antimony(V) complex is a monomeric derivative, (Lp)(Ph₃Sb)OH, and the bismuth(V) complex is a dinuclear compound bridged by an oxygen atom, (Lp)₂(Ph₃Bi)₂O. Both compounds inhibited the growth of a chronic myelogenous leukemia cell line and the complex of Bi(V) was about five times more active than free lapachol. This work provides a rare example of an organo-Bi(V) complex showing significant cytotoxic activity.
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Affiliation(s)
- Ludmila G. de Oliveira
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Meiriane M. Silva
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Flávia C. S. de Paula
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Elene C. Pereira-Maia
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Cláudio L. Donnici
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Carlos A. de Simone
- Departamento de Física e Informática, Instituto de Física, Universidade de São Paulo (USP), 13560-970 São Carlos, SP, Brazil
| | - Frédéric Frézard
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), 31270-901 Belo Horizonte, MG, Brazil
| | - Eufrânio N. da Silva Júnior
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil
- Laboratório de Química Sintética e Heterocíclica, Universidade Federal de Minas Gerais (UFMG), 31270-901 Belo Horizonte, MG, Brazil
| | - Cynthia Demicheli
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil
- Author to whom correspondence should be addressed; ; Tel.: +55-31-3409-5755; Fax: +55-31-3409-5700
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Demicheli C, Frézard F, Pereira FA, Santos DM, Mangrum JB, Farrell NP. Interaction of arsenite with a zinc finger CCHC peptide: evidence for formation of an As-Zn-peptide mixed complex. J Inorg Biochem 2011; 105:1753-8. [PMID: 22099473 DOI: 10.1016/j.jinorgbio.2011.09.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2011] [Revised: 09/12/2011] [Accepted: 09/14/2011] [Indexed: 11/26/2022]
Abstract
The interaction of arsenite with a Cys(3)His (CCHC) zinc finger model (34-51) HIV-1 nucleocapsid protein p7 (NCp7) peptide in the absence and presence of Zn(II) was studied using fluorescence spectroscopy, CD (circular dichroism) and ESI-MS (Electrospray Ionization Mass Spectrometry). We found that arsenic forms different complexes with the free peptide and the zinc finger peptide. In the former case the peptide conformation differed greatly from that of the zinc finger, whereas in the second case a mixed As-Zn-peptide complex was formed with partial preservation of zinc finger conformation. An apparent stability constant was estimated for the mixed As-Zn-peptide complex (K=2083 M(-1) and 442 M(-1) at 25°C and pHs 6 and 7, respectively). Our study also shows that the interaction of arsenic with the CCHC motif is facilitated by glutathione (GSH), through formation of a GS-As-peptide conjugate.
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Affiliation(s)
- Cynthia Demicheli
- Departamento de Química, Instituto de Ciências Exatas, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Pampulha, Belo Horizonte, MG, Brazil.
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Ribeiro RR, Silva ME, Silva SM, Fulgêncio GO, Pena HF, Frézard F, Michalick MS, Gennari SM. Occurrence of anti-Neospora caninum and anti-Toxoplasma gondii antibodies in dogs with visceral leishmaniasis. Pesq Vet Bras 2011. [DOI: 10.1590/s0100-736x2011000600012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Uninfected dogs and those naturally infected with Leishmania chagasi exhibiting different clinical forms of disease were evaluated for the presence of anti-Neospora caninum and anti-Toxoplasma gondii antibodies. Blood samples were collected from 110 mongrel dogs. Sera were tested using the indirect fluorescent antibody test (IFAT), and the animals with visceral leishmaniasis (VL) (n=60) were classified clinically. Out of the 110 sera investigated, 5 (4.5%) were positive for N. caninum (IFAT>50) and 36 (32.7%) for T. gondii (IFAT>16). Anti-L. chagasi antibody titers in asymptomatic dogs (n=10) were found to be significantly lower (P<0.05) than those in oligosymptomatic ones (n=22), which were in turn significantly lower (P<0.05) than those in symptomatic ones (n=28). No association between Leishmania and N. caninum infections was observed. Among dogs infected with L. chagasi, a tendency (P=0.053) towards an association between the infection with T. gondii and the appearance of VL symptoms was observed, suggesting that the clinical manifestation of VL in dogs may enhance their susceptibility to T. gondii. The possible influence of the immunosuppressive status of canine leishmaniasis in the different clinical forms of the disease is discussed.
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do Monte-Neto RL, Coelho AC, Raymond F, Légaré D, Corbeil J, Melo MN, Frézard F, Ouellette M. Gene expression profiling and molecular characterization of antimony resistance in Leishmania amazonensis. PLoS Negl Trop Dis 2011; 5:e1167. [PMID: 21629719 PMCID: PMC3101167 DOI: 10.1371/journal.pntd.0001167] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Accepted: 03/31/2011] [Indexed: 11/21/2022] Open
Abstract
Background Drug resistance is a major problem in leishmaniasis chemotherapy. RNA expression profiling using DNA microarrays is a suitable approach to study simultaneous events leading to a drug-resistance phenotype. Genomic analysis has been performed primarily with Old World Leishmania species and here we investigate molecular alterations in antimony resistance in the New World species L. amazonensis. Methods/Principal Findings We selected populations of L. amazonensis promastigotes for resistance to antimony by step-wise drug pressure. Gene expression of highly resistant mutants was studied using DNA microarrays. RNA expression profiling of antimony-resistant L. amazonensis revealed the overexpression of genes involved in drug resistance including the ABC transporter MRPA and several genes related to thiol metabolism. The MRPA overexpression was validated by quantitative real-time RT-PCR and further analysis revealed that this increased expression was correlated to gene amplification as part of extrachromosomal linear amplicons in some mutants and as part of supernumerary chromosomes in other mutants. The expression of several other genes encoding hypothetical proteins but also nucleobase and glucose transporter encoding genes were found to be modulated. Conclusions/Significance Mechanisms classically found in Old World antimony resistant Leishmania were also highlighted in New World antimony-resistant L. amazonensis. These studies were useful to the identification of resistance molecular markers. Leishmania are unicellular microorganisms that can be transmitted to humans by the bite of sandflies. They cause a spectrum of diseases called leishmaniasis, which are classified as neglected tropical diseases by the World Health Organization. The treatment of leishmaniasis is based on the administration of antimony-containing drugs. These drugs have been used since 1947 and still constitute the mainstay for leishmaniasis treatment in several countries. One of the problems with these compounds is the emergence of resistance. Our work seeks to understand how these parasites become resistant to the drug. We studied antimony-resistant Leishmania amazonensis mutants. We analyzed gene expression at the whole genome level in antimony-resistant parasites and identified mechanisms used by Leishmania for resistance. This work could help us in developing new strategies for treatment in endemic countries where people are unresponsive to antimony-based chemotherapy. The identification of common mechanisms among different species of resistant parasites may also contribute to the development of diagnostic kits to identify and monitor the spread of resistance.
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Affiliation(s)
- Rubens L. do Monte-Neto
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brasil
- Centre de Recherche en Infectiologie du Centre de Recherche du CHUL and Département de Microbiologie, Immunologie et Infectiologie, Université Laval, Québec, Québec, Canada
| | - Adriano C. Coelho
- Centre de Recherche en Infectiologie du Centre de Recherche du CHUL and Département de Microbiologie, Immunologie et Infectiologie, Université Laval, Québec, Québec, Canada
| | - Frédéric Raymond
- Centre de Recherche en Infectiologie du Centre de Recherche du CHUL and Département de Microbiologie, Immunologie et Infectiologie, Université Laval, Québec, Québec, Canada
- Département de Médecine Moléculaire Faculté de Médecine, Université Laval, Québec, Québec, Canada
| | - Danielle Légaré
- Centre de Recherche en Infectiologie du Centre de Recherche du CHUL and Département de Microbiologie, Immunologie et Infectiologie, Université Laval, Québec, Québec, Canada
| | - Jacques Corbeil
- Centre de Recherche en Infectiologie du Centre de Recherche du CHUL and Département de Microbiologie, Immunologie et Infectiologie, Université Laval, Québec, Québec, Canada
- Département de Médecine Moléculaire Faculté de Médecine, Université Laval, Québec, Québec, Canada
| | - Maria N. Melo
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brasil
| | - Frédéric Frézard
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brasil
| | - Marc Ouellette
- Centre de Recherche en Infectiologie du Centre de Recherche du CHUL and Département de Microbiologie, Immunologie et Infectiologie, Université Laval, Québec, Québec, Canada
- * E-mail:
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Gomes MTR, Guimarães G, Frézard F, Kalapothakis E, Minozzo JC, Chaim OM, Veiga SS, Oliveira SC, Chávez-Olórtegui C. Determination of sphingomyelinase-D activity of Loxosceles venoms in sphingomyelin/cholesterol liposomes containing horseradish peroxidase. Toxicon 2011; 57:574-9. [DOI: 10.1016/j.toxicon.2011.01.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2010] [Revised: 12/21/2010] [Accepted: 01/02/2011] [Indexed: 11/28/2022]
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