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de Andrade Picanço G, Ferreira de Lima N, Cristina Gomes T, de Sousa Mendes Moreira Alves D, Luísa da Costa T, Vinaud MC. Intraperitoneal and intracranial experimental cysticercosis present different metabolic preferences after treatment with isolated or combined albendazole and nitazoxanide. Acta Trop 2022; 226:106264. [PMID: 34919953 DOI: 10.1016/j.actatropica.2021.106264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 11/15/2021] [Accepted: 12/03/2021] [Indexed: 11/17/2022]
Abstract
Cysticercosis is a zoonotic public health issue especially severe when the parasite is in the central nervous system although it may be found all over the human organism. Taenia crassiceps cysticerci inoculated in mice is the experimental model used to study cysticercosis. The most used cysticercosis treatment is with albendazole (ABZ). Nitazoxanide (NTZ) has been experimentally tested against this parasite. Metabolic analysis has been used to determine drugs impact on the parasite. The aim of this study was to determine the in vivo metabolic impact of the ABZ-NTZ combination in T. crassiceps cysticerci inoculated in mice peritoneal and intracranial cavities. Mice were experimentally inoculated with T. crassiceps cysticerci in the intraperitoneal cavity or in the intracranial one. Thirty days after the infection they were treated with NaCl 0.9% (control group), 50 mg/kg of ABZ, 50 mg/kg of NTZ or 50 mg/kg of NTZ and ABZ (ABZ/NTZ combination). 24 h after treatment the animals were euthanized and the cysticerci analyzed through high performance chromatography and spectrophotometry in order to detect the glycolytic, mitochondrial and protein catabolism pathways. The intracranial parasites used more intensely the homolactic fermentation while the intraperitoneal ones presented a greater use of the mitochondrial pathways and protein catabolism. Regarding the glycolytic pathways, it was possible to observe a significant impact induced by the drugs used, both isolated or in combination. It was possible to detect an increase in the fumarate reductase pathway after the drugs exposure and no impact in the protein's catabolism. Therefore, the cysticerci showed different uses of metabolic pathways regarding the site of inoculation due to the availability of nutrients inherent of each environment. This study showed the parasite metabolic resilience and capability of use of different biochemical pathways in order to ensure survival in spite of a hostile environment.
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Affiliation(s)
- Guaraciara de Andrade Picanço
- Laboratory of studies of the host-parasite relationship, Tropical Pathology and Public Health Institute, Federal University of Goias, Rua 235, s/n, Setor Universitário, Goiania, Goias CEP 74605-050 Brazil
| | - Nayana Ferreira de Lima
- Laboratory of studies of the host-parasite relationship, Tropical Pathology and Public Health Institute, Federal University of Goias, Rua 235, s/n, Setor Universitário, Goiania, Goias CEP 74605-050 Brazil
| | - Taynara Cristina Gomes
- Laboratory of studies of the host-parasite relationship, Tropical Pathology and Public Health Institute, Federal University of Goias, Rua 235, s/n, Setor Universitário, Goiania, Goias CEP 74605-050 Brazil
| | - Daniella de Sousa Mendes Moreira Alves
- Laboratory of studies of the host-parasite relationship, Tropical Pathology and Public Health Institute, Federal University of Goias, Rua 235, s/n, Setor Universitário, Goiania, Goias CEP 74605-050 Brazil
| | - Tatiane Luísa da Costa
- Laboratory of studies of the host-parasite relationship, Tropical Pathology and Public Health Institute, Federal University of Goias, Rua 235, s/n, Setor Universitário, Goiania, Goias CEP 74605-050 Brazil
| | - Marina Clare Vinaud
- Laboratory of studies of the host-parasite relationship, Tropical Pathology and Public Health Institute, Federal University of Goias, Rua 235, s/n, Setor Universitário, Goiania, Goias CEP 74605-050 Brazil.
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Alves DDSMM, Gonçalves GS, Moraes AS, Alves LM, Carmo Neto JRD, Hecht MM, Nitz N, Gurgel-Gonçalves R, Bernardes G, Castro AMD, Chalita MR, Vinaud MC. The first Acanthamoeba keratitis case in the Midwest region of Brazil: diagnosis, genotyping of the parasite and disease outcome. Rev Soc Bras Med Trop 2018; 51:716-719. [PMID: 30304286 DOI: 10.1590/0037-8682-0010-2018] [Citation(s) in RCA: 5] [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: 02/02/2018] [Accepted: 07/05/2018] [Indexed: 11/22/2022] Open
Abstract
We report an Acanthamoeba keratitis case associated with the use of contact lens in a 28-year-old female from Brasília, Brazil. Samples from corneal scraping and contact lens case were used for culture establishment, PCR amplification, and partial sequencing (fragments of ~400kb) of small subunit rDNA; both culture and PCR were positive. The sequence analyses of the cornea and of isolates from the contact lens case showed similarity with the T4 genotype. To the best of our knowledge, this is the first report of T4 Acanthamoeba keratitis case from the Midwest region of Brazil.
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Affiliation(s)
- Daniella de Sousa Mendes Moreira Alves
- Laboratório de Estudos da Relação Parasito-Hospedeiro, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, GO, Brasil
| | - Gustavo Souza Gonçalves
- Departamento de Oftalmologia, Faculdade de Medicina, Universidade de Brasília, Brasília, DF, Brasil
| | - Aline Silva Moraes
- Laboratório Interdisciplinar de Biociências, Faculdade de Medicina, Universidade de Brasília, Brasília, DF, Brasil
| | | | - José Rodrigues do Carmo Neto
- Laboratório de Estudos da Relação Parasito-Hospedeiro, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, GO, Brasil
| | - Mariana Machado Hecht
- Laboratório Interdisciplinar de Biociências, Faculdade de Medicina, Universidade de Brasília, Brasília, DF, Brasil
| | - Nadjar Nitz
- Laboratório Interdisciplinar de Biociências, Faculdade de Medicina, Universidade de Brasília, Brasília, DF, Brasil
| | - Rodrigo Gurgel-Gonçalves
- Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, Brasília, DF, Brasil
| | - Geisa Bernardes
- Laboratório de Estudos da Relação Parasito-Hospedeiro, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, GO, Brasil
| | - Ana Maria de Castro
- Laboratório de Estudos da Relação Parasito-Hospedeiro, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, GO, Brasil
| | - Maria Regina Chalita
- Departamento de Oftalmologia, Faculdade de Medicina, Universidade de Brasília, Brasília, DF, Brasil
| | - Marina Clare Vinaud
- Laboratório de Estudos da Relação Parasito-Hospedeiro, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, GO, Brasil
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Alves DDSMM, Moraes AS, Alves LM, Gurgel-Gonçalves R, Lino Junior RDS, Cuba-Cuba CA, Vinaud MC. Experimental infection of T4 Acanthamoeba genotype determines the pathogenic potential. Parasitol Res 2016; 115:3435-40. [PMID: 27164833 DOI: 10.1007/s00436-016-5105-3] [Citation(s) in RCA: 10] [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] [Received: 04/11/2016] [Accepted: 04/29/2016] [Indexed: 12/26/2022]
Abstract
T4 is the Acanthamoeba genotype most related to cases of granulomatous amoebic encephalitis (GAE) in immunocompromised patients and of keratitis in contact lens wearers. The determination of the pathogenic potential of Acanthamoeba clinical and environmental isolates using experimental models is extremely important to elucidate the capacity of free-living organisms to establish and cause disease in hosts. The aim of this study was to compare and evaluate the histopathology and culture between two different routes of experimental infection of T4 Acanthamoeba isolated from environmental and clinical source in mice (intracranial and intraperitoneal). Swiss isogenic healthy mice were inoculated with 10(4) trophozoites by intracranial (IC) and intraperitoneal (IP) routes and observed during 21 days. The brains from animals inoculated by the IC route were collected and from the animals of the IP inoculation group, the brains, livers, kidneys, spleens, and lungs were removed. The organs were prepared and appropriately divided to be evaluated with histopathology and culture. There was no significant difference between the inoculation routes in terms of isolates recovery (χ(2) = 0.09; p = 0.76). In the IC group, isolate recovery rate was significantly higher in histopathology than the one achieved by culture (χ(2) = 6.45; p < 0.01). Experimental infection revealed that all isolates inoculated could be considered invasive because it was possible to recover evolutive forms of Acanthamoeba in both routes. This work represents the first in vivo pathogenicity assay of primary isolation source in Central region of Brazil showing in vivo pathogenicity and hematogenous spread capacity of these protozoa, improving the knowledge on free-living amoebae isolates.
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Affiliation(s)
- Daniella de Sousa Mendes Moreira Alves
- Instituto de Patologia Tropical e Saúde Pública (IPTSP), Universidade Federal de Goiás, Rua 235, s/n, Setor Universitário, Goiânia, GO, 74650-050, Brazil.
| | - Aline Silva Moraes
- Laboratório Interdisciplinar de Biociências, Faculdade de Medicina, Universidade de Brasília-UnB, Brasília, Brazil
| | | | - Rodrigo Gurgel-Gonçalves
- Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília-UnB, Brasília, Brazil
| | - Ruy de Souza Lino Junior
- Instituto de Patologia Tropical e Saúde Pública (IPTSP), Universidade Federal de Goiás, Rua 235, s/n, Setor Universitário, Goiânia, GO, 74650-050, Brazil
| | - César Augusto Cuba-Cuba
- Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília-UnB, Brasília, Brazil
| | - Marina Clare Vinaud
- Instituto de Patologia Tropical e Saúde Pública (IPTSP), Universidade Federal de Goiás, Rua 235, s/n, Setor Universitário, Goiânia, GO, 74650-050, Brazil
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Alves DDSMM, Gurgel-Gonçalves R, Albuquerque P, Cuba-Cuba CA, Muniz-Junqueira MI, Kückelhaus SAS. A method for microbial decontamination of Acanthamoeba cultures using the peritoneal cavity of mice. Asian Pac J Trop Biomed 2015. [DOI: 10.1016/j.apjtb.2015.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Alves DDSMM, Moraes AS, Nitz N, de Oliveira MGC, Hecht MM, Gurgel-Gonçalves R, Cuba CAC. Occurrence and characterization of Acanthamoeba similar to genotypes T4, T5, and T2/T6 isolated from environmental sources in Brasília, Federal District, Brazil. Exp Parasitol 2012; 131:239-44. [PMID: 22546341 DOI: 10.1016/j.exppara.2012.04.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2011] [Revised: 04/08/2012] [Accepted: 04/12/2012] [Indexed: 10/28/2022]
Abstract
Species of Acanthamoeba can cause keratitis and brain infections. The characterization of environmental isolates is necessary to analyze the risk of human infection. We aimed at identifying and genotyping Acanthamoeba isolates from soil, swimming pools, and water features in Brasília, Federal District, Brazil, as well as determining their physiological characteristics and pathogenic potential. Among the 18 isolates studied, eight were similar to genotype T5, five to T4, and one to T2/T6, classified by the sequence analysis of 18S rDNA. Genotypes of four isolates were not determined. Ten isolates (55%) grew at 37 °C and seven (39%) grew in media with 1.5M mannitol, which are the physiological parameters associated with pathogenic Acanthamoeba; also, four isolates from swimming pools presented high pathogenic potential. Our results indicate a widespread distribution of potentially pathogenic Acanthamoeba T4, T5, and T2/T6 in different environmental sources in Brasília, revealing the potential risk of human infection and the need of preventive measures.
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Affiliation(s)
- Daniella de Sousa Mendes Moreira Alves
- Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, Campus Universitário Darcy Ribeiro, Brasília, DF, Brazil.
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