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Balmer EA, Wirdnam CD, Faso C. A core UPS molecular complement implicates unique endocytic compartments at the parasite-host interface in Giardia lamblia. Virulence 2023; 14:2174288. [PMID: 36730629 PMCID: PMC9928461 DOI: 10.1080/21505594.2023.2174288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Unconventional protein secretion (UPS) plays important roles in cell physiology. In contrast to canonical secretory routes, UPS does not generally require secretory signal sequences and often bypasses secretory compartments such as the ER and the Golgi apparatus. Giardia lamblia is a protist parasite with reduced subcellular complexity which releases several proteins, some of them virulence factors, without canonical secretory signals. This implicates UPS at the parasite-host interface. No dedicated machinery nor mechanism(s) for UPS in Giardia are currently known, although speculations on the involvement of endocytic organelles called PV/PECs, have been put forth. To begin to address the question of whether PV/PECs are implicated in virulence-associated UPS and to define the composition of molecular machinery involved in protein release, we employed affinity purification and mass spectrometry, coupled to microscopy-based subcellular localization and signal correlation quantification to investigate the interactomes of 11 reported unconventionally secreted proteins, all predicted to be cytosolic. A subset of these are associated with PV/PECs. Extended and validated interactomes point to a core PV/PECs-associated UPS machinery, which includes uncharacterized and Giardia-specific coiled-coil proteins and NEK kinases. Finally, a subset of the alpha-giardin protein family was enriched in all PV/PECs-associated protein interactomes, highlighting a previously unappreciated role for these proteins at PV/PECs and in UPS. Taken together, our results provide the first characterization of a virulence-associated UPS protein complex in Giardia lamblia at PV/PECs, suggesting a novel link between these primarily endocytic and feeding organelles and UPS at the parasite-host interface.
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Affiliation(s)
- Erina A. Balmer
- Institute of Cell Biology, University of Bern, Bern, Switzerland,Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | | | - Carmen Faso
- Institute of Cell Biology, University of Bern, Bern, Switzerland,Multidisciplinary Center for Infectious Diseases, University of Bern, Bern, Switzerland,CONTACT Carmen Faso
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2
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Benchimol M, Gadelha AP, de Souza W. Ultrastructural Alterations of the Human Pathogen Giardia intestinalis after Drug Treatment. Pathogens 2023; 12:810. [PMID: 37375500 DOI: 10.3390/pathogens12060810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 06/04/2023] [Accepted: 06/05/2023] [Indexed: 06/29/2023] Open
Abstract
This review presents the main cell characteristics altered after in vitro incubation of the parasite with commercial drugs used to treat the disease caused by Giardia intestinalis. This important intestinal parasite primarily causes diarrhea in children. Metronidazole and albendazole are the primary compounds used in therapy against Giardia intestinalis. However, they provoke significant side effects, and some strains have developed resistance to metronidazole. Benzimidazole carbamates, such as albendazole and mebendazole, have shown the best activity against Giardia. Despite their in vitro efficacy, clinical treatment with benzimidazoles has yielded conflicting results, demonstrating lower cure rates. Recently, nitazoxanide has been suggested as an alternative to these drugs. Therefore, to enhance the quality of chemotherapy against this parasite, it is important to invest in developing other compounds that can interfere with key steps of metabolic pathways or cell structures and organelles. For example, Giardia exhibits a unique cell structure called the ventral disc, which is crucial for host adhesion and pathogenicity. Thus, drugs that can disrupt the adhesion process hold promise for future therapy against Giardia. Additionally, this review discusses new drugs and strategies that can be employed, as well as suggestions for developing novel drugs to control the infection caused by this parasite.
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Affiliation(s)
- Marlene Benchimol
- BIOTRANS-CAXIAS, Universidade do Grande Rio. UNIGRANRIO, Rio de Janeiro 96200-000, Brazil
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-901, Brazil
- Instituto Nacional de Ciência e Tecnologia em Biologia Estrutural e Bioimagens e Centro Nacional de Biologia Estrutural e Bioimagens, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-901, Brazil
| | - Ana Paula Gadelha
- Diretoria de Metrologia Científica, Instituto Nacional de Metrologia, Qualidade e Tecnologia (INMETRO), Rio de Janeiro 25259-020, Brazil
| | - Wanderley de Souza
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-901, Brazil
- Instituto Nacional de Ciência e Tecnologia em Biologia Estrutural e Bioimagens e Centro Nacional de Biologia Estrutural e Bioimagens, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-901, Brazil
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3
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Romano PS, Akematsu T, Besteiro S, Bindschedler A, Carruthers VB, Chahine Z, Coppens I, Descoteaux A, Alberto Duque TL, He CY, Heussler V, Le Roch KG, Li FJ, de Menezes JPB, Menna-Barreto RFS, Mottram JC, Schmuckli-Maurer J, Turk B, Tavares Veras PS, Salassa BN, Vanrell MC. Autophagy in protists and their hosts: When, how and why? AUTOPHAGY REPORTS 2023; 2:2149211. [PMID: 37064813 PMCID: PMC10104450 DOI: 10.1080/27694127.2022.2149211] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Accepted: 11/15/2022] [Indexed: 03/12/2023]
Abstract
Pathogenic protists are a group of organisms responsible for causing a variety of human diseases including malaria, sleeping sickness, Chagas disease, leishmaniasis, and toxoplasmosis, among others. These diseases, which affect more than one billion people globally, mainly the poorest populations, are characterized by severe chronic stages and the lack of effective antiparasitic treatment. Parasitic protists display complex life-cycles and go through different cellular transformations in order to adapt to the different hosts they live in. Autophagy, a highly conserved cellular degradation process, has emerged as a key mechanism required for these differentiation processes, as well as other functions that are crucial to parasite fitness. In contrast to yeasts and mammals, protist autophagy is characterized by a modest number of conserved autophagy-related proteins (ATGs) that, even though, can drive the autophagosome formation and degradation. In addition, during their intracellular cycle, the interaction of these pathogens with the host autophagy system plays a crucial role resulting in a beneficial or harmful effect that is important for the outcome of the infection. In this review, we summarize the current state of knowledge on autophagy and other related mechanisms in pathogenic protists and their hosts. We sought to emphasize when, how, and why this process takes place, and the effects it may have on the parasitic cycle. A better understanding of the significance of autophagy for the protist life-cycle will potentially be helpful to design novel anti-parasitic strategies.
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Affiliation(s)
- Patricia Silvia Romano
- Laboratorio de Biología de Trypanosoma cruzi y de la célula hospedadora. Instituto de Histología y Embriología de Mendoza. Universidad Nacional de Cuyo. (IHEM-CONICET-UNCUYO). Facultad de Ciencias Médicas. Universidad Nacional de Cuyo. Av. Libertador 80 (5500), Mendoza, Argentina
| | - Takahiko Akematsu
- Department of Biosciences, College of Humanities and Sciences, Nihon University, Tokyo, Japan
| | | | | | - Vern B Carruthers
- Department of Microbiology and Immunology, University of Michigan School of Medicine, Ann Arbor, MI, USA
| | - Zeinab Chahine
- Department of Molecular, Cell and Systems Biology, University of California Riverside, CA, USA
| | - Isabelle Coppens
- Department of Molecular Microbiology and Immunology. Department of Molecular Microbiology and Immunology. Johns Hopkins Malaria Research Institute. Johns Hopkins University Bloomberg School of Public Health. Baltimore 21205, MD, USA
| | - Albert Descoteaux
- Centre Armand-Frappier Santé Biotechnologie, Institut national de la recherche scientifique, Laval, QC
| | - Thabata Lopes Alberto Duque
- Autophagy Inflammation and Metabolism Center, University of New Mexico Health Sciences Center, Albuquerque, NM, USA; Department of Molecular Genetics and Microbiology, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
| | - Cynthia Y He
- Department of Biological Sciences, National University of Singapore, Singapore
| | - Volker Heussler
- Institute of Cell Biology.University of Bern. Baltzerstr. 4 3012 Bern
| | - Karine G Le Roch
- Department of Molecular, Cell and Systems Biology, University of California Riverside, CA, USA
| | - Feng-Jun Li
- Department of Biological Sciences, National University of Singapore, Singapore
| | | | | | - Jeremy C Mottram
- York Biomedical Research Institute, Department of Biology, University of York, York, UK
| | | | - Boris Turk
- Department of Biochemistry and Molecular and Structural Biology, Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
| | - Patricia Sampaio Tavares Veras
- Laboratory of Host-Parasite Interaction and Epidemiology, Gonçalo Moniz Institute, Fiocruz-Bahia
- National Institute of Science and Technology of Tropical Diseases - National Council for Scientific Research and Development (CNPq)
| | - Betiana Nebai Salassa
- Laboratorio de Biología de Trypanosoma cruzi y de la célula hospedadora. Instituto de Histología y Embriología de Mendoza. Universidad Nacional de Cuyo. (IHEM-CONICET-UNCUYO). Facultad de Ciencias Médicas. Universidad Nacional de Cuyo. Av. Libertador 80 (5500), Mendoza, Argentina
| | - María Cristina Vanrell
- Laboratorio de Biología de Trypanosoma cruzi y de la célula hospedadora. Instituto de Histología y Embriología de Mendoza. Universidad Nacional de Cuyo. (IHEM-CONICET-UNCUYO). Facultad de Ciencias Médicas. Universidad Nacional de Cuyo. Av. Libertador 80 (5500), Mendoza, Argentina
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4
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Meira RDMV, Gomes SLDS, Schaeffer E, Da Silva T, Brito ACDS, Siqueira LM, Inácio JD, Almeida-Amaral EE, Da-Cruz AM, Bezerra-Paiva M, Neves RH, Rodrigues LS, Dutra PML, Costa PRR, da Silva AJM, Da-Silva SAG. Low doses of 3-phenyl-lawsone or meglumine antimoniate delivery by tattooing route are successful in reducing parasite load in cutaneous lesions of Leishmania ( Viannia) braziliensis-infected hamsters. Front Cell Infect Microbiol 2023; 13:1025359. [PMID: 36743305 PMCID: PMC9892647 DOI: 10.3389/fcimb.2023.1025359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 01/02/2023] [Indexed: 01/20/2023] Open
Abstract
Current therapeutic ways adopted for the treatment of leishmaniasis are toxic and expensive including parasite resistance is a growing problem. Given this scenario, it is urgent to explore treatment alternatives for leishmaniasis. The aim of this study was to evaluate the effect of 3-phenyl-lawsone (3-PL) naphthoquinone on Leishmania (Viannia) braziliensis infection, both in vitro and in vivo, using two local routes of administration: subcutaneous (higher dose) and tattoo (lower dose). In vitro 3-PL showed low toxicity for macrophages (CC50 >3200 µM/48h) and activity against intracellular amastigotes (IC50 = 193 ± 19 µM/48h) and promastigotes (IC50 = 116 ± 26 µM/72h), in which induced increased ROS generation. Additionally, 3-PL up-regulated the production of cytokines such as tumor necrosis factor alpha (TNF-α), monocyte chemotactic protein 1 (MCP-1), interleukin-6 (IL-6) and IL-10 in infected macrophages. However, the anti-amastigote action was independent of nitric oxide production. Treatment of hamsters infected with L. (V.) braziliensis from one week after infection with 3-PL by subcutaneous (25 µg/Kg) or tattooing (2.5 µg/Kg) route, during 3 weeks (3 times/week) or 2 weeks (2 times/week) significantly decreased the parasite load (p<0.001) in the lesion. The reduction of parasite load by 3-PL treatment was comparable to reference drug meglumine antimoniate administered by the same routes (subcutaneous 1mg/Kg and tattoo 0.1mg/Kg). In addition, treatment started from five weeks after infection with 3-PL per tattoo also decreased the parasite load. These results show the anti-leishmanial effect of 3-PL against L. (V.) braziliensis and its efficacy by subcutaneous (higher dose) and tattoo (lower dose) routes. In addition, this study shows that drug delivery by tattooing the lesion allows the use of lower doses than the conventional subcutaneous route, which may support the development of a new therapeutic strategy that can be adopted for leishmaniasis.
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Affiliation(s)
| | - Sara Lins da Silva Gomes
- Laboratório de Catálise Orgânica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Edgar Schaeffer
- Laboratório de Catálise Orgânica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Thayssa Da Silva
- Laboratório de Imunofarmacologia Parasitária, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Larissa Moreira Siqueira
- Laboratório de Imunofarmacologia Parasitária, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Job Domingos Inácio
- Laboratório de Bioquímica de Tripanosomatídeos, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | | | - Alda Maria Da-Cruz
- Disciplina de Parasitologia, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil,Laboratório Interdisciplinar de Pesquisas Médicas, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Milla Bezerra-Paiva
- Laboratório Interdisciplinar de Pesquisas Médicas, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Renata Heisler Neves
- Laboratório de Helmintologia Romero Lascasas Porto, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Luciana Silva Rodrigues
- Laboratório de Imunopatologia, Faculdade de Ciências Médicas, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | | | | | | | - Silvia Amaral Gonçalves Da-Silva
- Laboratório de Imunofarmacologia Parasitária, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil,*Correspondence: Silvia Amaral Gonçalves Da-Silva,
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5
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Benchimol M, Gadelha AP, de Souza W. Unusual Cell Structures and Organelles in Giardia intestinalis and Trichomonas vaginalis Are Potential Drug Targets. Microorganisms 2022; 10:2176. [PMID: 36363768 PMCID: PMC9698047 DOI: 10.3390/microorganisms10112176] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Revised: 10/28/2022] [Accepted: 10/31/2022] [Indexed: 09/29/2023] Open
Abstract
This review presents the main cell organelles and structures of two important protist parasites, Giardia intestinalis, and Trichomonas vaginalis; many are unusual and are not found in other eukaryotic cells, thus could be good candidates for new drug targets aimed at improvement of the chemotherapy of diseases caused by these eukaryotic protists. For example, in Giardia, the ventral disc is a specific structure to this parasite and is fundamental for the adhesion and pathogenicity to the host. In Trichomonas, the hydrogenosome, a double membrane-bounded organelle that produces ATP, also can be a good target. Other structures include mitosomes, ribosomes, and proteasomes. Metronidazole is the most frequent compound used to kill many anaerobic organisms, including Giardia and Trichomonas. It enters the cell by passive diffusion and needs to find a highly reductive environment to be reduced to the nitro radicals to be active. However, it provokes several side effects, and some strains present metronidazole resistance. Therefore, to improve the quality of the chemotherapy against parasitic protozoa is important to invest in the development of highly specific compounds that interfere with key steps of essential metabolic pathways or in the functional macromolecular complexes which are most often associated with cell structures and organelles.
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Affiliation(s)
- Marlene Benchimol
- Laboratorio de Ultraestrutura Celular Hertha Meyer, Centro de Ciêcias da Saúde, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Cidade Universitaria, Rio de Janeiro 96200-000, Brazil
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-901, Brazil
- Instituto Nacional de Ciência e Tecnologia em Biologia Estrutural e Bioimagens e Centro Nacional de Biologia Estrutural e Bioimagens, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-901, Brazil
| | - Ana Paula Gadelha
- Diretoria de Metrologia Aplicada as Ciências da Vida, Instituto Nacional de Metrologia, Qualidade e Tecnologia (INMETRO), Rio de Janeiro 25250-020, Brazil
| | - Wanderley de Souza
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-901, Brazil
- Instituto Nacional de Ciência e Tecnologia em Biologia Estrutural e Bioimagens e Centro Nacional de Biologia Estrutural e Bioimagens, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-901, Brazil
- CMABio, Escola Superior de Saúde, Universidade do Estado do Amazonas-UEA, Manaus 69850-000, Brazil
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6
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Oliveira RVF, de Souza W, Vögerl K, Bracher F, Benchimol M, Gadelha APR. In vitro effects of the 4-[(10H-phenothiazin-10-yl)methyl]-N-hydroxybenzamide on Giardia intestinalis trophozoites. Acta Trop 2022; 232:106484. [PMID: 35483428 DOI: 10.1016/j.actatropica.2022.106484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 04/19/2022] [Accepted: 04/22/2022] [Indexed: 11/01/2022]
Abstract
Giardiasis is an intestinal disease caused by the parasite protozoan Giardia intestinalis. For more than five decades, the treatment of this disease has been based on compounds such as nitroimidazoles and benzimidazoles. The parasite's adverse effects and therapeutic failure are largely recognized. Therefore, it is necessary to develop new forms of chemotherapy treatment against giardiasis. Lysine deacetylases (KDACs), which remove an acetyl group from lysine residues in histone and non-histone proteins as tubulin, are found in the Giardia genome and can become an interesting option for giardiasis treatment. In the present study, we evaluated the effects of 4-[(10H-phenothiazin-10-yl)methyl]-N-hydroxybenzamide, a new class I/II KDAC inhibitor, on G. intestinalis growth, cytoskeleton, and ultrastructure organization. This compound decreased parasite proliferation and viability and displayed an IC50 value of 179 nM. Scanning electron microscopy revealed the presence of protrusions on the cell surface after treatment. In addition, the vacuoles containing concentric membranous lamella and glycogen granules were observed in treated trophozoites. The cell membrane appeared deformed just above these vacuoles. Alterations on the microtubular cytoskeleton of the parasite were not observed after drug exposure. The number of diving cells with incomplete cytokinesis increased after treatment, indicating that the compound can interfere in the late steps of cell division. Our results indicate that 4-[(10H-phenothiazin-10-yl)methyl]-N-hydroxybenzamide should be explored to develop new therapeutic compounds for treating giardiasis.
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7
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Pedra-Rezende Y, Macedo IS, Midlej V, Mariante RM, Menna-Barreto RFS. Different Drugs, Same End: Ultrastructural Hallmarks of Autophagy in Pathogenic Protozoa. Front Microbiol 2022; 13:856686. [PMID: 35422792 PMCID: PMC9002357 DOI: 10.3389/fmicb.2022.856686] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 03/02/2022] [Indexed: 01/18/2023] Open
Abstract
Protozoan parasites interact with a wide variety of organisms ranging from bacteria to humans, representing one of the most common causes of parasitic diseases and an important public health problem affecting hundreds of millions of people worldwide. The current treatment for these parasitic diseases remains unsatisfactory and, in some cases, very limited. Treatment limitations together with the increased resistance of the pathogens represent a challenge for the improvement of the patient’s quality of life. The continuous search for alternative preclinical drugs is mandatory, but the mechanisms of action of several of these compounds have not been described. Electron microscopy is a powerful tool for the identification of drug targets in almost all cellular models. Interestingly, ultrastructural analysis showed that several classes of antiparasitic compounds induced similar autophagic phenotypes in trypanosomatids, trichomonadids, and apicomplexan parasites as well as in Giardia intestinalis and Entamoeba spp. with the presence of an increased number of autophagosomes as well as remarkable endoplasmic reticulum profiles surrounding different organelles. Autophagy is a physiological process of eukaryotes that maintains homeostasis by the self-digestion of nonfunctional organelles and/or macromolecules, limiting redundant and damaged cellular components. Here, we focus on protozoan autophagy to subvert drug effects, discussing its importance for successful chemotherapy.
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Affiliation(s)
- Yasmin Pedra-Rezende
- Laboratório de Biologia Celular, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
| | - Isabela S Macedo
- Laboratório de Biologia Estrutural, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
| | - Victor Midlej
- Laboratório de Ultraestrutura Celular, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
| | - Rafael M Mariante
- Laboratório de Biologia Estrutural, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
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8
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Auriostigue-Bautista JC, Hernández-Vázquez E, González-Calderón D, Figueroa-Romero JL, Castillo-Villanueva A, Torres-Arroyo A, Ponce-Macotela M, Rufino-González Y, Martínez-Gordillo M, Miranda LD, Oria-Hernández J, Reyes-Vivas H. Discovery of Benzopyrrolizidines as Promising Antigiardiasic Agents. Front Cell Infect Microbiol 2022; 11:828100. [PMID: 35096662 PMCID: PMC8790063 DOI: 10.3389/fcimb.2021.828100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 12/20/2021] [Indexed: 11/13/2022] Open
Abstract
Current treatments for giardiasis include drugs with undesirable side effects, which increase the levels of therapeutic desertion and promote drug resistance in the parasites. Herein, we describe the antigiardiasic evaluation on Giardia lamblia trophozoites of a structurally diverse collection of 74 molecules. Among these scaffolds, we discovered a benzopyrrolizidine derivative with higher antigiardiasic activity (IC50 = 11 µM) and lower cytotoxicity in human cell cultures (IC50 = 130 µM) than those displayed by the current gold-standard drugs (metronidazole and tinidazole). Furthermore, this compound produced morphologic modifications of trophozoites, with occasional loss of one of the nuclei, among other changes not observed with standard giardicidal drugs, suggesting that it might act through a novel mechanism of action.
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Affiliation(s)
- Juan Carlos Auriostigue-Bautista
- Laboratorio de Bioquímica-Genética, Instituto Nacional de Pediatría. Insurgentes Sur 3700-C, Col. Insurgentes Cuicuilco, Alcaldía Coyoacán, Ciudad de México, Mexico
| | - Eduardo Hernández-Vázquez
- Departamento de Química Orgánica, Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Alcaldía Coyoacán, Ciudad de México, Mexico
| | - David González-Calderón
- Departamento de Química Orgánica, Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Alcaldía Coyoacán, Ciudad de México, Mexico
| | - Jorge Luís Figueroa-Romero
- Laboratorio de Bioquímica-Genética, Instituto Nacional de Pediatría. Insurgentes Sur 3700-C, Col. Insurgentes Cuicuilco, Alcaldía Coyoacán, Ciudad de México, Mexico
| | - Adriana Castillo-Villanueva
- Laboratorio de Bioquímica-Genética, Instituto Nacional de Pediatría. Insurgentes Sur 3700-C, Col. Insurgentes Cuicuilco, Alcaldía Coyoacán, Ciudad de México, Mexico
| | - Angélica Torres-Arroyo
- Laboratorio de Bioquímica-Genética, Instituto Nacional de Pediatría. Insurgentes Sur 3700-C, Col. Insurgentes Cuicuilco, Alcaldía Coyoacán, Ciudad de México, Mexico
| | - Martha Ponce-Macotela
- Laboratorio de Parasitología-Experimental, Instituto Nacional de Pediatría. Insurgentes Sur 3700-C, Col. Insurgentes Cuicuilco, Alcaldía Coyoacán, Ciudad de México, Mexico
| | - Yadira Rufino-González
- Laboratorio de Parasitología-Experimental, Instituto Nacional de Pediatría. Insurgentes Sur 3700-C, Col. Insurgentes Cuicuilco, Alcaldía Coyoacán, Ciudad de México, Mexico
| | - Mario Martínez-Gordillo
- Laboratorio de Parasitología-Experimental, Instituto Nacional de Pediatría. Insurgentes Sur 3700-C, Col. Insurgentes Cuicuilco, Alcaldía Coyoacán, Ciudad de México, Mexico
| | - Luis D Miranda
- Departamento de Química Orgánica, Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Alcaldía Coyoacán, Ciudad de México, Mexico
| | - Jesús Oria-Hernández
- Laboratorio de Bioquímica-Genética, Instituto Nacional de Pediatría. Insurgentes Sur 3700-C, Col. Insurgentes Cuicuilco, Alcaldía Coyoacán, Ciudad de México, Mexico
| | - Horacio Reyes-Vivas
- Laboratorio de Bioquímica-Genética, Instituto Nacional de Pediatría. Insurgentes Sur 3700-C, Col. Insurgentes Cuicuilco, Alcaldía Coyoacán, Ciudad de México, Mexico
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9
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Barbosa JMC, Nicoletti CD, da Silva PB, Melo TG, Futuro DO, Ferreira VF, Salomão K. Characterization and trypanocidal activity of a β-lapachone-containing drug carrier. PLoS One 2021; 16:e0246811. [PMID: 33661933 PMCID: PMC7932091 DOI: 10.1371/journal.pone.0246811] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 01/26/2021] [Indexed: 12/12/2022] Open
Abstract
The treatment of Chagas disease (CD), a neglected parasitic condition caused by Trypanosoma cruzi, is still based on only two drugs, nifurtimox (Nif) and benznidazole (Bz), both of which have limited efficacy in the late chronic phase and induce severe side effects. This scenario justifies the continuous search for alternative drugs, and in this context, the natural naphthoquinone β-lapachone (β-Lap) and its derivatives have demonstrated important trypanocidal activities. Unfortunately, the decrease in trypanocidal activity in the blood, high toxicity to mammalian cells and low water solubility of β-Lap limit its systemic administration and, consequently, clinical applications. For this reason, carriers as drug delivery systems can strategically maximize the therapeutic effects of this drug, overcoming the above mentioned restrictions. Accordingly, the aim of this study is to investigate the in vitro anti-T. cruzi effects of β-Lap encapsulated in2-hydroxypropyl-β-cyclodextrin (2HP-β-CD) and its potential toxicity to mammalian cells.
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Affiliation(s)
- Juliana M. C. Barbosa
- Laboratório de Biologia Celular Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Caroline D. Nicoletti
- Laboratório de Síntese Orgânica Aplicada, Instituto de Química, Universidade Federal Fluminense, Niterói, RJ, Brazil
- Faculdade de Farmácia, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | - Patrícia B. da Silva
- Laboratório de Biologia Celular Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Tatiana G. Melo
- Laboratório de Ultraestrutura Celular, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Débora O. Futuro
- Laboratório de Síntese Orgânica Aplicada, Instituto de Química, Universidade Federal Fluminense, Niterói, RJ, Brazil
| | - Vitor F. Ferreira
- Laboratório de Síntese Orgânica Aplicada, Instituto de Química, Universidade Federal Fluminense, Niterói, RJ, Brazil
- Faculdade de Farmácia, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | - Kelly Salomão
- Laboratório de Biologia Celular Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Rio de Janeiro, Brazil
- * E-mail:
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10
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da Silva CR, S Campos RD, de A Neto JB, Sampaio LS, do Nascimento FB, do Av Sá LG, Cândido TM, Magalhães HI, da Cruz EH, da Silva Júnior EN, de Moraes MO, Cavalcanti BC, Silva J, Marinho ES, Júnior HV. Antifungal activity of β-lapachone against azole-resistant Candida spp. and its aspects upon biofilm formation. Future Microbiol 2020; 15:1543-1554. [PMID: 33215521 DOI: 10.2217/fmb-2020-0011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Aim: The purpose of this study was to assess the antifungal effect of β-lapachone (β-lap) on azole-resistant strains of Candida spp. in both planktonic and biofilm form. Materials & methods: The antifungal activity of β-lap was evaluated by broth microdilution, flow cytometry and the comet assay. The cell viability of the biofilms was assessed using the MTT assay. Results: β-lap showed antifungal activity against resistant strains of Candida spp. in planktonic form. In addition, β-lap decreased the viability of mature biofilms and inhibited the formation of biofilms in vitro. Conclusion: β-lap showed antifungal activity against Candida spp., suggesting that the compound can be utilized as an adjunct agent in the treatment of candidiasis.
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Affiliation(s)
- Cecília R da Silva
- Laboratory of Bioprospection in Antimicrobial Molecules (LABIMAN), Drug Research & Development Center, Federal University of Ceará, Fortaleza, CE 60430-275, Brazil
- Department of Clinical & Toxicological Analysis, School of Pharmacy, Laboratory of Bioprospection in Antimicrobial Molecules (LABIMAN), Federal University of Ceará, Fortaleza, CE 60430-170, Brazil
| | - Rosana de S Campos
- Laboratory of Bioprospection in Antimicrobial Molecules (LABIMAN), Drug Research & Development Center, Federal University of Ceará, Fortaleza, CE 60430-275, Brazil
- Christus University Center (UNICHRISTUS), Fortaleza, CE 60160-230, Brazil
| | - João B de A Neto
- Laboratory of Bioprospection in Antimicrobial Molecules (LABIMAN), Drug Research & Development Center, Federal University of Ceará, Fortaleza, CE 60430-275, Brazil
- Christus University Center (UNICHRISTUS), Fortaleza, CE 60160-230, Brazil
| | - Letícia S Sampaio
- Laboratory of Bioprospection in Antimicrobial Molecules (LABIMAN), Drug Research & Development Center, Federal University of Ceará, Fortaleza, CE 60430-275, Brazil
- Department of Clinical & Toxicological Analysis, School of Pharmacy, Laboratory of Bioprospection in Antimicrobial Molecules (LABIMAN), Federal University of Ceará, Fortaleza, CE 60430-170, Brazil
| | - Francisca Bsa do Nascimento
- Laboratory of Bioprospection in Antimicrobial Molecules (LABIMAN), Drug Research & Development Center, Federal University of Ceará, Fortaleza, CE 60430-275, Brazil
- Department of Clinical & Toxicological Analysis, School of Pharmacy, Laboratory of Bioprospection in Antimicrobial Molecules (LABIMAN), Federal University of Ceará, Fortaleza, CE 60430-170, Brazil
| | - Lívia G do Av Sá
- Laboratory of Bioprospection in Antimicrobial Molecules (LABIMAN), Drug Research & Development Center, Federal University of Ceará, Fortaleza, CE 60430-275, Brazil
- Department of Clinical & Toxicological Analysis, School of Pharmacy, Laboratory of Bioprospection in Antimicrobial Molecules (LABIMAN), Federal University of Ceará, Fortaleza, CE 60430-170, Brazil
| | - Thiago M Cândido
- Laboratory of Bioprospection in Antimicrobial Molecules (LABIMAN), Drug Research & Development Center, Federal University of Ceará, Fortaleza, CE 60430-275, Brazil
- Department of Clinical & Toxicological Analysis, School of Pharmacy, Laboratory of Bioprospection in Antimicrobial Molecules (LABIMAN), Federal University of Ceará, Fortaleza, CE 60430-170, Brazil
| | - Hemerson If Magalhães
- School of Pharmacy, Federal University of Paraíba, João Pessoa 58059-900, PB, Brazil
| | - Eduardo Hg da Cruz
- Laboratory of Synthetic & Heterocyclic Chemistry, Department of Chemistry, Institute of Exact Sciences, Federal University of Minas Gerais, Minas Gerais 31270-901, Brazil
| | - Eufrânio N da Silva Júnior
- Laboratory of Synthetic & Heterocyclic Chemistry, Department of Chemistry, Institute of Exact Sciences, Federal University of Minas Gerais, Minas Gerais 31270-901, Brazil
| | - Manoel O de Moraes
- Drug Research & Development Center, Federal University of Ceará, Fortaleza, CE 60430-275, Brazil
| | - Bruno C Cavalcanti
- Drug Research & Development Center, Federal University of Ceará, Fortaleza, CE 60430-275, Brazil
| | - Jacilene Silva
- Departmentof Chemistry, Group of Theoretical Chemistry and Electrochemistry (GQTE), StateUniversity of Ceará, Limoeiro do Norte, Ceará 62930-000, Brazil
| | - Emmanuel S Marinho
- Departmentof Chemistry, Group of Theoretical Chemistry and Electrochemistry (GQTE), StateUniversity of Ceará, Limoeiro do Norte, Ceará 62930-000, Brazil
| | - Hélio Vn Júnior
- Laboratory of Bioprospection in Antimicrobial Molecules (LABIMAN), Drug Research & Development Center, Federal University of Ceará, Fortaleza, CE 60430-275, Brazil
- Department of Clinical & Toxicological Analysis, School of Pharmacy, Laboratory of Bioprospection in Antimicrobial Molecules (LABIMAN), Federal University of Ceará, Fortaleza, CE 60430-170, Brazil
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11
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Durán-Pérez SA, López-Moreno HS, Jiménez-Edeza M, Parra-Unda JR, Rangel-López E, Rendón-Maldonado JG. Upregulation of Cathepsin B-like Protease Activity During Apoptosis inGiardia duodenalis. CURR PROTEOMICS 2019. [DOI: 10.2174/1570164616666190204112452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:In eukaryotic cells, apoptosis signaling pathways are controlled mainly by aspartic acid cysteine proteases (caspases). However, certain unicellular microorganisms, such as Giardia duodenalis, lack these proteins. Thus, other cysteine proteases may play an important role in the parasite apoptosis signaling pathway.Objective:To understand the effect of cathepsin B-like inhibition on the cell viability of Giardia duodenalis and its cell death process.Methods:Bioinformatics analysis was performed to identify apoptotic proteases. Analysis showed that cathepsin B-like protease genes from G. duodenalis were the best candidate. A homology modeling technique was used to explore in silico the inhibitory effect of E-64 against cathepsin B-like proteases from G. duodenalis genome and to examine the effect of curcumin on cathepsin B-like activity regulation. In addition, the effect of E-64 on parasite survival and DNA fragmentation was tested.Results:Eight cathepsin B-like protease coding genes were identified in silico. Interestingly, while these sequences lacked the cathepsin B characteristic occluding loop, they maintained the catalytic active- site responsible for cathepsin B activity, which was evidenced by the increase in the degradation of the Z-RR-AMC substrate, suggesting the upregulation of the activity of these proteins. Additionally, inhibition of E-64 against G. duodenalis trophozoites caused a decrease in DNA fragmentation compared to control cells and had a positive effect on parasite survival after exposure to curcumin.Conclusion:Overall, these results suggested that Giardia duodenalis might have a cell death mechanism in which cathepsin B-like proteases play an important role.
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Affiliation(s)
- Sergio Alonso Durán-Pérez
- Doctorate in Biotechnology, Faculty of Biological Chemistry Sciences, Autonomous University of Sinaloa, Calzada de las Americas Norte 2771, Bureaucrat, 80030 Culiacan, Sinaloa, Mexico
| | - Héctor Samuel López-Moreno
- Doctorate in Biotechnology, Faculty of Biological Chemistry Sciences, Autonomous University of Sinaloa, Calzada de las Americas Norte 2771, Bureaucrat, 80030 Culiacan, Sinaloa, Mexico
| | - Maribel Jiménez-Edeza
- Doctorate in Biomedical Sciences, Faculty of Biological Chemistry Sciences, Autonomous University of Sinaloa, Calzada de las Americas Norte 2771, Bureaucrat, 80030 Culiacan, Sinaloa, Mexico
| | - Jesús Ricardo Parra-Unda
- Doctorate in Biotechnology, Faculty of Biological Chemistry Sciences, Autonomous University of Sinaloa, Calzada de las Americas Norte 2771, Bureaucrat, 80030 Culiacan, Sinaloa, Mexico
| | - Edgar Rangel-López
- Laboratory of Amino Acids Exciters, National Institute of Neurology and Neurosurgery Manuel Velasco Suarez, Insurgentes Sur 3877, 14269, Mexico City, Mexico
| | - José Guadalupe Rendón-Maldonado
- Doctorate in Biotechnology, Faculty of Biological Chemistry Sciences, Autonomous University of Sinaloa, Calzada de las Americas Norte 2771, Bureaucrat, 80030 Culiacan, Sinaloa, Mexico
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12
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Gadelha APR, Bravim B, Vidal J, Reignault LC, Cosme B, Huber K, Bracher F, de Souza W. Alterations on growth and cell organization of Giardia intestinalis trophozoites after treatment with KH-TFMDI, a novel class III histone deacetylase inhibitor. Int J Med Microbiol 2019; 309:130-142. [PMID: 30665874 DOI: 10.1016/j.ijmm.2019.01.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 12/30/2018] [Accepted: 01/14/2019] [Indexed: 12/14/2022] Open
Abstract
Giardia trophozoites have developed resistance mechanisms to currently available compounds, leading to treatment failures. In this context, the development of new additional agents is mandatory. Sirtuins, which are class III NAD+-dependent histone deacetylases, have been considered important targets for the development of new anti-parasitic drugs. Here, we evaluated the activity of KH-TFMDI, a novel 3-arylideneindolin-2-one-type sirtuin inhibitor, on G. intestinalis trophozoites. This compound decreased the trophozoite growth presenting an IC50 value lower than nicotinamide, a moderately active inhibitor of yeast and human sirtuins. Light and electron microscopy analysis showed the presence of multinucleated cell clusters suggesting that the cytokinesis could be compromised in treated trophozoites. Cell rounding, concomitantly with the folding of the ventro-lateral flange and flagella internalization, was also observed. These cells eventually died by a mechanism which lead to DNA/nuclear damage, formation of multi-lamellar bodies and annexin V binding on the parasite surface. Taken together, these data show that KH-TFMDI has significant effects against G. intestinalis trophozoites proliferation and structural organization and suggest that histone deacetylation pathway should be explored on this protozoon as target for chemotherapy.
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Affiliation(s)
- Ana Paula R Gadelha
- Diretoria de Metrologia Aplicada a Ciências da Vida, Instituto Nacional de Metrologia, Qualidade e Tecnologia, Rio de Janeiro, RJ, Brazil
| | - Bárbara Bravim
- Diretoria de Metrologia Aplicada a Ciências da Vida, Instituto Nacional de Metrologia, Qualidade e Tecnologia, Rio de Janeiro, RJ, Brazil
| | - Juliana Vidal
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Lissa Catherine Reignault
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Bruno Cosme
- Diretoria de Metrologia Aplicada a Ciências da Vida, Instituto Nacional de Metrologia, Qualidade e Tecnologia, Rio de Janeiro, RJ, Brazil
| | - Kilian Huber
- Department of Pharmacy, Center for Drug Research, Ludwig-Maximilians-University of Munich, Munich, Germany; Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Franz Bracher
- Department of Pharmacy, Center for Drug Research, Ludwig-Maximilians-University of Munich, Munich, Germany
| | - Wanderley de Souza
- Diretoria de Metrologia Aplicada a Ciências da Vida, Instituto Nacional de Metrologia, Qualidade e Tecnologia, Rio de Janeiro, RJ, Brazil; Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil; Instituto Nacional de Ciência e Tecnologia em Biologia Estrutural e Bioimagens e Centro Nacional de Biologia Estrutural e Bioimagens, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
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13
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Cardoso MFDC, Gomes ATPC, Moreira CDS, Simões MMQ, Neves MGPMS, da Rocha DR, da Silva FDC, Moreirinha C, Almeida A, Ferreira VF, Cavaleiro JAS. Efficient Catalytic Oxidation of 3-Arylthio- and 3-Cyclohexylthio-lapachone Derivatives to New Sulfonyl Derivatives and Evaluation of Their Antibacterial Activities. Molecules 2017; 22:molecules22020302. [PMID: 28212345 PMCID: PMC6155948 DOI: 10.3390/molecules22020302] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 02/06/2017] [Accepted: 02/13/2017] [Indexed: 01/30/2023] Open
Abstract
New sulfonyl-lapachones were efficiently obtained through the catalytic oxidation of arylthio- and cyclohexylthio-lapachone derivatives with hydrogen peroxide in the presence of a Mn(III) porphyrin complex. The antibacterial activities of the non-oxidized and oxidized lapachone derivatives against the Gram-negative bacteria Escherichia coli and the Gram-positive bacteria Staphylococcus aureus were evaluated after their incorporation into polyvinylpyrrolidone (PVP) micelles. The obtained results show that the PVP-formulations of the lapachones 4b–g and of the sulfonyl-lapachones 7e and 7g reduced the growth of S. aureus.
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Affiliation(s)
- Mariana F do C Cardoso
- Department of Chemistry and QOPNA, University of Aveiro, Aveiro 3810-193, Portugal.
- Departamento de Química Orgânica, Instituto de Química, Universidade Federal Fluminense, Niterói 24020-150, RJ, Brazil.
| | - Ana T P C Gomes
- Department of Chemistry and QOPNA, University of Aveiro, Aveiro 3810-193, Portugal.
| | - Caroline Dos S Moreira
- Departamento de Química Orgânica, Instituto de Química, Universidade Federal Fluminense, Niterói 24020-150, RJ, Brazil.
| | - Mário M Q Simões
- Department of Chemistry and QOPNA, University of Aveiro, Aveiro 3810-193, Portugal.
| | - Maria G P M S Neves
- Department of Chemistry and QOPNA, University of Aveiro, Aveiro 3810-193, Portugal.
| | - David R da Rocha
- Departamento de Química Orgânica, Instituto de Química, Universidade Federal Fluminense, Niterói 24020-150, RJ, Brazil.
| | - Fernando de C da Silva
- Departamento de Química Orgânica, Instituto de Química, Universidade Federal Fluminense, Niterói 24020-150, RJ, Brazil.
| | - Catarina Moreirinha
- Department of Biology and CESAM, University of Aveiro, Aveiro 3810-193, Portugal.
| | - Adelaide Almeida
- Department of Biology and CESAM, University of Aveiro, Aveiro 3810-193, Portugal.
| | - Vitor F Ferreira
- Departamento de Química Orgânica, Instituto de Química, Universidade Federal Fluminense, Niterói 24020-150, RJ, Brazil.
| | - José A S Cavaleiro
- Department of Chemistry and QOPNA, University of Aveiro, Aveiro 3810-193, Portugal.
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14
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Dos Anjos DO, Sobral Alves ES, Gonçalves VT, Fontes SS, Nogueira ML, Suarez-Fontes AM, Neves da Costa JB, Rios-Santos F, Vannier-Santos MA. Effects of a novel β-lapachone derivative on Trypanosoma cruzi: Parasite death involving apoptosis, autophagy and necrosis. Int J Parasitol Drugs Drug Resist 2016; 6:207-219. [PMID: 27770751 PMCID: PMC5078628 DOI: 10.1016/j.ijpddr.2016.10.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Revised: 10/07/2016] [Accepted: 10/10/2016] [Indexed: 12/18/2022]
Abstract
Natural products comprise valuable sources for new antiparasitic drugs. Here we tested the effects of a novel β-lapachone derivative on Trypanosoma cruzi parasite survival and proliferation and used microscopy and cytometry techniques to approach the mechanism(s) underlying parasite death. The selectivity index determination indicate that the compound trypanocidal activity was over ten-fold more cytotoxic to epimastigotes than to macrophages or splenocytes. Scanning electron microscopy analysis revealed that the R72 β-lapachone derivative affected the T. cruzi morphology and surface topography. General plasma membrane waving and blebbing particularly on the cytostome region were observed in the R72-treated parasites. Transmission electron microscopy observations confirmed the surface damage at the cytostome opening vicinity. We also observed ultrastructural evidence of the autophagic mechanism termed macroautophagy. Some of the autophagosomes involved large portions of the parasite cytoplasm and their fusion/confluence may lead to necrotic parasite death. The remarkably enhanced frequency of autophagy triggering was confirmed by quantitating monodansylcadaverine labeling. Some cells displayed evidence of chromatin pycnosis and nuclear fragmentation were detected. This latter phenomenon was also indicated by DAPI staining of R72-treated cells. The apoptotis induction was suggested to take place in circa one-third of the parasites assessed by annexin V labeling measured by flow cytometry. TUNEL staining corroborated the apoptosis induction. Propidium iodide labeling indicate that at least 10% of the R72-treated parasites suffered necrosis within 24 h. The present data indicate that the β-lapachone derivative R72 selectively triggers T. cruzi cell death, involving both apoptosis and autophagy-induced necrosis.
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Affiliation(s)
- Danielle Oliveira Dos Anjos
- Lab. Biologia Parasitária, Instituto Gonçalo Moniz, Fundação Oswaldo Cruz - FIOCRUZ, Brazil; Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz UESC, Brazil
| | | | | | - Sheila Suarez Fontes
- Lab. Biologia Parasitária, Instituto Gonçalo Moniz, Fundação Oswaldo Cruz - FIOCRUZ, Brazil
| | - Mateus Lima Nogueira
- Lab. Biologia Parasitária, Instituto Gonçalo Moniz, Fundação Oswaldo Cruz - FIOCRUZ, Brazil
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15
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Matadamas-Martínez F, Castillo R, Hernández-Campos A, Méndez-Cuesta C, de Souza W, Gadelha AP, Nogueda-Torres B, Hernández JM, Yépez-Mulia L. Proteomic and ultrastructural analysis of the effect of a new nitazoxanide-N-methyl-1H-benzimidazole hybrid against Giardia intestinalis. Res Vet Sci 2016; 105:171-9. [DOI: 10.1016/j.rvsc.2016.02.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Revised: 01/22/2016] [Accepted: 02/05/2016] [Indexed: 01/08/2023]
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16
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Hosamani B, Ribeiro MF, da Silva Júnior EN, Namboothiri INN. Catalytic asymmetric reactions and synthesis of quinones. Org Biomol Chem 2016; 14:6913-31. [DOI: 10.1039/c6ob01119e] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Organo- and metal–ligand catalysed asymmetric reactions of quinones lead to complex enantiopure compounds including quinones.
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Affiliation(s)
| | - Matheus F. Ribeiro
- Institute of Exact Sciences
- Department of Chemistry
- Federal University of Minas Gerais
- Belo Horizonte
- Brazil
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17
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Williams C, Lloyd D, Kolarich D, Alagesan K, Duchêne M, Cable J, Williams D, Leitsch D. Disrupted intracellular redox balance of the diplomonad fish parasite Spironucleus vortens by 5-nitroimidazoles and garlic-derived compounds. Vet Parasitol 2012; 190:62-73. [DOI: 10.1016/j.vetpar.2012.05.011] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Revised: 05/10/2012] [Accepted: 05/11/2012] [Indexed: 01/22/2023]
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18
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Goldston AM, Powell RR, Temesvari LA. Sink or swim: lipid rafts in parasite pathogenesis. Trends Parasitol 2012; 28:417-26. [PMID: 22906512 DOI: 10.1016/j.pt.2012.07.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2012] [Revised: 07/16/2012] [Accepted: 07/17/2012] [Indexed: 12/26/2022]
Abstract
Lipid rafts, sterol- and sphingolipid-rich membrane microdomains, have been extensively studied in mammalian cells. Recently, lipid rafts have been shown to control virulence in a variety of parasites including Entamoeba histolytica, Giardia intestinalis, Leishmania spp., Plasmodium spp., Toxoplasma gondii, and Trypanosoma spp. Parasite rafts regulate adhesion to host and invasion, and parasite adhesion molecules often localize to rafts. Parasite rafts also control vesicle trafficking, motility, and cell signaling. Parasites disrupt host cell rafts; the dysregulation of host membrane function facilitates the establishment of infection and evasion of the host immune system. Discerning the mechanism by which lipid rafts regulate parasite pathogenesis is essential to our understanding of virulence. Such insight may guide the development of new drugs for disease management.
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Affiliation(s)
- Amanda M Goldston
- Department of Genetics and Biochemistry, Clemson University, Clemson, SC 29634, USA
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Abstract
SUMMARYProgrammed cell death (PCD) has been observed in many unicellular eukaryotes; however, in very few cases have the pathways been described. Recently the early divergent amitochondrial eukaryote Giardia has been included in this group. In this paper we investigate the processes of PCD in Giardia. We performed a bioinformatics survey of Giardia genomes to identify genes associated with PCD alongside traditional methods for studying apoptosis and autophagy. Analysis of Giardia genomes failed to highlight any genes involved in apoptotic-like PCD; however, we were able to induce apoptotic-like morphological changes in response to oxidative stress (H2O2) and drugs (metronidazole). In addition we did not detect caspase activity in induced cells. Interestingly, we did observe changes resembling autophagy when cells were starved (staining with MDC) and genome analysis revealed some key genes associated with autophagy such as TOR, ATG1 and ATG 16. In organisms such as Trichomonas vaginalis, Entamoeba histolytica and Blastocystis similar observations have been made but no genes have been identified. We propose that Giardia possess a pathway of autophagy and a form of apoptosis very different from the classical known mechanism; this may represent an early form of programmed cell death.
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20
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Brennand A, Gualdrón-López M, Coppens I, Rigden DJ, Ginger ML, Michels PA. Autophagy in parasitic protists: Unique features and drug targets. Mol Biochem Parasitol 2011; 177:83-99. [DOI: 10.1016/j.molbiopara.2011.02.003] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2010] [Revised: 01/30/2011] [Accepted: 02/02/2011] [Indexed: 12/24/2022]
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21
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Gao Y, Ren Q, Ang SM, Wang J. Enantioselective organocatalytic Michael-hemiketalization catalyzed by a trans-bifunctional indane thiourea catalyst. Org Biomol Chem 2011; 9:3691-7. [PMID: 21483944 DOI: 10.1039/c1ob05404j] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient, convenient and enantioselective Michael-hemiketalization reaction has been developed for the synthesis of naphthoquinones. In this work, a novel trans-bifunctional indane thiourea catalyst has been reported to promote this process to afford high yields (up to 99%) and high to excellent enantiomeric excesses (90-98% ee).
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Affiliation(s)
- Yaojun Gao
- Department of Chemistry, National University of Singapore, Singapore
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22
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Ferreira VF, Ferreira SB, de Carvalho da Silva F. Strategies for the synthesis of bioactive pyran naphthoquinones. Org Biomol Chem 2010; 8:4793-802. [DOI: 10.1039/c0ob00277a] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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