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Nunes PP, Almeida MR, Pacheco FG, Fantini C, Furtado CA, Ladeira LO, Jorio A, Júnior APM, Santos RL, Borges ÁM. Detection of carbon nanotubes in bovine raw milk through Fourier transform Raman spectroscopy. J Dairy Sci 2024; 107:2681-2689. [PMID: 37923204 DOI: 10.3168/jds.2023-23481] [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: 03/12/2023] [Accepted: 10/11/2023] [Indexed: 11/07/2023]
Abstract
The potential use of carbon-based methodologies for drug delivery and reproductive biology in cows raises concerns about residues in milk and food safety. This study aimed to assess the potential of Fourier transform Raman spectroscopy and discriminant analysis using partial least squares (PLS-DA) to detect functionalized multiwalled carbon nanotubes (MWCNT) in bovine raw milk. Oxidized MWCNT were diluted in milk at different concentrations from 25.00 to 0.01 µg/mL. Raman spectroscopy measurements and PLS-DA were performed to identify low concentrations of MWCNT in milk samples. The PLS-DA model was characterized by the analysis of the variable importance in projection (VIP) scores. All the training samples were correctly classified by the model, resulting in no false-positive or false-negative classifications. For test samples, only one false-negative result was observed, for 0.01 µg/mL MWCNT dilution. The association between Raman spectroscopy and PLS-DA was able to identify MWCNT diluted in milk samples up to 0.1 µg/mL. The PLS-DA model was built and validated using a set of test samples and spectrally interpreted based on the highest VIP scores. This allowed the identification of the vibrational modes associated with the D and G bands of MWCNT, as well as the milk bands, which were the most important variables in this analysis.
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Affiliation(s)
- Philipe P Nunes
- Department of Veterinary Clinic and Surgery, Veterinary School, Federal University of Minas Gerais, Belo Horizonte, MG 31270-901, Brazil
| | - Mariana R Almeida
- Department of Chemistry, Institute of Exact Science, Federal University of Minas Gerais, Belo Horizonte, MG 31270-901, Brazil
| | - Flávia G Pacheco
- Laboratory of Carbon Nanostructure Chemistry, Nuclear Technology Development Center, Belo Horizonte, MG 31270-901, Brazil
| | - Cristiano Fantini
- Department of Physics, Institute of Exact Science, Federal University of Minas Gerais, Belo Horizonte, MG 31270-901, Brazil
| | - Clascídia A Furtado
- Laboratory of Carbon Nanostructure Chemistry, Nuclear Technology Development Center, Belo Horizonte, MG 31270-901, Brazil
| | - Luiz O Ladeira
- Department of Physics, Institute of Exact Science, Federal University of Minas Gerais, Belo Horizonte, MG 31270-901, Brazil
| | - Ado Jorio
- Department of Physics, Institute of Exact Science, Federal University of Minas Gerais, Belo Horizonte, MG 31270-901, Brazil
| | - Antônio P M Júnior
- Department of Veterinary Clinic and Surgery, Veterinary School, Federal University of Minas Gerais, Belo Horizonte, MG 31270-901, Brazil
| | - Renato L Santos
- Department of Veterinary Clinic and Surgery, Veterinary School, Federal University of Minas Gerais, Belo Horizonte, MG 31270-901, Brazil
| | - Álan M Borges
- Department of Veterinary Clinic and Surgery, Veterinary School, Federal University of Minas Gerais, Belo Horizonte, MG 31270-901, Brazil.
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Carvalho TP, Toledo FAO, Bautista DFA, Silva MF, Oliveira JBS, Lima PA, Costa FB, Ribeiro NQ, Lee JY, Birbrair A, Paixão TA, Tsolis RM, Santos RL. Pericytes modulate endothelial inflammatory response during bacterial infection. mBio 2024; 15:e0325223. [PMID: 38289074 PMCID: PMC10936204 DOI: 10.1128/mbio.03252-23] [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: 12/12/2023] [Accepted: 12/13/2023] [Indexed: 03/14/2024] Open
Abstract
Pericytes are located around blood vessels, in close contact with endothelial cells. We discovered that pericytes dampen pro-inflammatory endothelial cell responses. Endothelial cells co-cultured with pericytes had markedly reduced expression of adhesion molecules (PECAM-1 and ICAM-1) and proinflammatory cytokines (CCL-2 and IL-6) in response to bacterial stimuli (Brucella ovis, Listeria monocytogenes, or Escherichia coli lipopolysaccharide). Pericyte-depleted mice intraperitoneally inoculated with either B. ovis, a stealthy pathogen that does not trigger detectable inflammation, or Listeria monocytogenes, developed peritonitis. Further, during Citrobacter rodentium infection, pericyte-depleted mice developed severe intestinal inflammation, which was not evident in control mice. The anti-inflammatory effect of pericytes required connexin 43, as either chemical inhibition or silencing of connexin 43 abrogated pericyte-mediated suppression of endothelial inflammatory responses. Our results define a mechanism by which pericytes modulate inflammation during infection, which shifts our understanding of pericyte biology: from a structural cell to a pro-active player in modulating inflammation. IMPORTANCE A previously unknown mechanism by which pericytes modulate inflammation was discovered. The absence of pericytes or blocking interaction between pericytes and endothelium through connexin 43 results in stronger inflammation, which shifts our understanding of pericyte biology, from a structural cell to a player in controlling inflammation.
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Affiliation(s)
- Thaynara P. Carvalho
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- Department of Medical Microbiology and Immunology, University of California, Davis, California, USA
| | - Frank A. O. Toledo
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Diego F. A. Bautista
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Monique F. Silva
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Jefferson B. S. Oliveira
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Pâmela A. Lima
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Fabíola B. Costa
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Noelly Q. Ribeiro
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Jee-Yon Lee
- Department of Medical Microbiology and Immunology, University of California, Davis, California, USA
| | - Alexander Birbrair
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- Department of Dermatology, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Tatiane A. Paixão
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Reneé M. Tsolis
- Department of Medical Microbiology and Immunology, University of California, Davis, California, USA
| | - Renato L. Santos
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- Department of Medical Microbiology and Immunology, University of California, Davis, California, USA
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3
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Spiga L, Winter MG, Muramatsu MK, Rojas VK, Chanin RB, Zhu W, Hughes ER, Taylor SJ, Faber F, Porwollik S, Carvalho TF, Qin T, Santos RL, Andrews-Polymenis H, McClelland M, Winter SE. Byproducts of inflammatory radical metabolism provide transient nutrient niches for microbes in the inflamed gut. bioRxiv 2023:2023.12.08.570695. [PMID: 38106073 PMCID: PMC10723490 DOI: 10.1101/2023.12.08.570695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
Louis Pasteur's experiments on tartaric acid laid the foundation for our understanding of molecular chirality, but major questions remain. By comparing the optical activity of naturally-occurring tartaric acid with chemically-synthesized paratartaric acid, Pasteur realized that naturally-occurring tartaric acid contained only L-tartaric acid while paratartaric acid consisted of a racemic mixture of D- and L-tartaric acid. Curiously, D-tartaric acid has no known natural source, yet several gut bacteria specifically degrade D-tartaric acid. Here, we investigated the oxidation of monosaccharides by inflammatory reactive oxygen and nitrogen species. We found that this reaction yields an array of alpha hydroxy carboxylic acids, including tartaric acid isomers. Utilization of inflammation- derived D- and L-tartaric acid enhanced colonization by Salmonella Typhimurium and E. coli in murine models of gut inflammation. Our findings suggest that byproducts of inflammatory radical metabolism, such as tartrate and other alpha hydroxy carboxylic acids, create transient nutrient niches for enteric pathogens and other potentially harmful bacteria. Furthermore, this work illustrates that inflammatory radicals generate a zoo of molecules, some of which may erroneously presumed to be xenobiotics.
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Silva LA, Souza MFS, Torquetti CG, Freitas DCO, Moreira LGA, Carvalho TP, Santana CH, Thompson JR, Rosa DCO, Jesus TR, Paixão TA, Santos RL. Antigenic and molecular evidence of Brucella sp.-associated epididymo-orchitis in frugivorous ( Artibeus lituratus) and nectarivorous ( Glossophaga soricina) bats in Brazil. Front Vet Sci 2023; 10:1235299. [PMID: 37701528 PMCID: PMC10493303 DOI: 10.3389/fvets.2023.1235299] [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: 06/06/2023] [Accepted: 07/18/2023] [Indexed: 09/14/2023] Open
Abstract
This study included 47 free-ranging bats from the State of Minas Gerais, Brazil. Six bats (12.8%) had genital inflammatory lesions, and two of them (one Artibeus lituratus and one Glossophaga soricina, a frugivorous and a nectarivorous, respectively) were diagnosed with Brucella sp. infection through PCR, and antigens in intralesional macrophages were detected using immunohistochemistry.
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Affiliation(s)
- Laice A. Silva
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Monique F. S. Souza
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Camila G. Torquetti
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Daniele C. O. Freitas
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Larissa G. A. Moreira
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Thaynara P. Carvalho
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Clarissa H. Santana
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Julia R. Thompson
- Sete Soluções e Tecnologia Ambiental, Belo Horizonte, Minas Gerais, Brazil
| | - Daniela C. O. Rosa
- Sete Soluções e Tecnologia Ambiental, Belo Horizonte, Minas Gerais, Brazil
| | - Tatiana R. Jesus
- Sete Soluções e Tecnologia Ambiental, Belo Horizonte, Minas Gerais, Brazil
| | - Tatiane A. Paixão
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Renato L. Santos
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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Santana CH, Souza LDRD, Silva LAD, Oliveira AR, Paula NFD, Santos DOD, Pereira FMAM, Vieira AD, Ribeiro LN, Soares-Neto LL, Bicudo ALDC, Hippolito AG, Paixão TAD, Santos RL. Metastatic Sertoli cell tumour in a captive giant anteater (Myrmecophaga tridactyla). J Comp Pathol 2023; 204:17-22. [PMID: 37321133 DOI: 10.1016/j.jcpa.2023.05.001] [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: 03/10/2023] [Revised: 04/05/2023] [Accepted: 05/08/2023] [Indexed: 06/17/2023]
Abstract
There are a few studies on diseases of anteaters, but reports on reproductive lesions and neoplasms of these animals are scarce. This is the first report of a case of metastatic Sertoli cell tumour in a giant anteater (Myrmecophaga tridactyla). The animal had renal lesions associated with impaired renal function as indicated by serum biochemistry. Histopathological and immunohistochemical examinations provided a conclusive diagnosis of Sertoli cell tumour with metastasis to the liver, kidneys and lymph nodes.
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Affiliation(s)
- Clarissa H Santana
- Escola de Veterinária, Departamento de Clínica e Cirurgia Veterinárias, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Lucas Dos R de Souza
- Escola de Veterinária, Departamento de Clínica e Cirurgia Veterinárias, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Laice A da Silva
- Escola de Veterinária, Departamento de Clínica e Cirurgia Veterinárias, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Ayisa R Oliveira
- Escola de Veterinária, Departamento de Clínica e Cirurgia Veterinárias, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Nayara F de Paula
- Escola de Veterinária, Departamento de Clínica e Cirurgia Veterinárias, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Daniel O Dos Santos
- Escola de Veterinária, Departamento de Clínica e Cirurgia Veterinárias, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Fernanda M A M Pereira
- Parque Zoológico Municipal de Bauru, Rodovia Com. João Barros, km 232 s/n, Vargem Limpa, Bauru, SP, Brazil
| | - André D Vieira
- Escola de Veterinária, Departamento de Clínica e Cirurgia Veterinárias, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Letícia N Ribeiro
- Escola de Veterinária, Departamento de Clínica e Cirurgia Veterinárias, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Lauro L Soares-Neto
- Parque Zoológico Municipal de Bauru, Rodovia Com. João Barros, km 232 s/n, Vargem Limpa, Bauru, SP, Brazil
| | | | - Alícia G Hippolito
- Parque Zoológico Municipal de Bauru, Rodovia Com. João Barros, km 232 s/n, Vargem Limpa, Bauru, SP, Brazil
| | - Tatiane A da Paixão
- Instituto de Ciências Biológicas, Departamento de Patologia Geral, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Renato L Santos
- Escola de Veterinária, Departamento de Clínica e Cirurgia Veterinárias, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil.
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6
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Santana CH, Oliveira AR, Carvalho TPD, Pereira FMAM, Santos DOD, Soares-Neto LL, Ramos MK, Novais TM, Paixão TAD, Santos RL, Serakides R. Tracheal stenosis in a yellow-crowned parrot (Amazona ochrocephala) due to diffuse ossification and osteopetrosis of tracheal rings. J Comp Pathol 2023; 204:7-10. [PMID: 37311267 DOI: 10.1016/j.jcpa.2023.05.003] [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: 11/24/2022] [Revised: 03/08/2023] [Accepted: 05/13/2023] [Indexed: 06/15/2023]
Abstract
Tracheal luminal stenosis can cause clinical respiratory distress in wild birds. We describe a case of tracheal stenosis due to diffuse ossification with osteopetrosis of tracheal rings in a yellow-crowned parrot (Amazona ochrocephala) with a history of chronic respiratory distress and death after development of marked dyspnoea. An ante-mortem radiographic examination revealed that the tracheal rings were radiopaque and that there were multiple areas of osteopenic change in long bones. At necropsy, there was stenosis of the tracheal rings characterized by complete replacement of cartilage by thickened compact bone with osteopetrosis and bone necrosis. The clinical respiratory distress and death of the parrot were associated with tracheal luminal stenosis due to thickening of the tracheal rings by diffuse ossification with osteopetrosis.
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Affiliation(s)
- Clarissa H Santana
- Departamento de Clínica e Cirurgia Veterinária, Escola de Veterinária, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Ayisa R Oliveira
- Departamento de Clínica e Cirurgia Veterinária, Escola de Veterinária, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Thaynara P de Carvalho
- Departamento de Clínica e Cirurgia Veterinária, Escola de Veterinária, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Fernanda M A M Pereira
- Parque Zoológico Municipal de Bauru, Rodovia Com. João Barros, km 232 s/n - Vargem Limpa, Bauru, SP, Brazil
| | - Daniel O Dos Santos
- Departamento de Clínica e Cirurgia Veterinária, Escola de Veterinária, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Lauro L Soares-Neto
- Parque Zoológico Municipal de Bauru, Rodovia Com. João Barros, km 232 s/n - Vargem Limpa, Bauru, SP, Brazil
| | - Marina K Ramos
- Parque Zoológico Municipal de Bauru, Rodovia Com. João Barros, km 232 s/n - Vargem Limpa, Bauru, SP, Brazil
| | - Thauane M Novais
- Parque Zoológico Municipal de Bauru, Rodovia Com. João Barros, km 232 s/n - Vargem Limpa, Bauru, SP, Brazil
| | - Tatiane A da Paixão
- Instituto de Ciências Biológicas, Departamento de Patologia Geral, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Renato L Santos
- Departamento de Clínica e Cirurgia Veterinária, Escola de Veterinária, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Rogéria Serakides
- Departamento de Clínica e Cirurgia Veterinária, Escola de Veterinária, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil.
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Oliveira ES, Queiroz CRR, Santos DO, Moreira LGA, Xavier RGC, Pierezan F, Santos RL, Lobato FCF, Silva ROS, Giaretta PR. Neurologic and cutaneous infection by Clostridium piliforme in a kitten with systemic Tyzzer disease. J Vet Diagn Invest 2023; 35:322-326. [PMID: 36896670 PMCID: PMC10185991 DOI: 10.1177/10406387231159931] [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] [Indexed: 03/11/2023] Open
Abstract
Tyzzer disease (TD) is a highly fatal condition of animals caused by Clostridium piliforme and characterized pathologically by enteritis, hepatitis, myocarditis, and occasionally encephalitis. Cutaneous lesions have been reported only rarely in animals with TD, and infection of the nervous system has not been described in cats, to our knowledge. We describe here neurologic and cutaneous infection by C. piliforme in a shelter kitten with systemic manifestations of TD and coinfection with feline panleukopenia virus. Systemic lesions included necrotizing typhlocolitis, hepatitis, myocarditis, and myeloencephalitis. The cutaneous lesions consisted of intraepidermal pustular dermatitis and folliculitis, with necrosis of keratinocytes and ulceration. Clostridial bacilli were identified within the cytoplasm of keratinocytes by fluorescence in situ hybridization, and a PCR assay was positive for C. piliforme. C. piliforme can infect keratinocytes leading to cutaneous lesions in cats with the location suggesting direct contact with contaminated feces as a route of infection.
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Affiliation(s)
- Eric S. Oliveira
- Programa de Pós-Graduação em Ciência Animal, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Cintia R. R. Queiroz
- Programa de Pós-Graduação em Ciência Animal, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Daniel O. Santos
- Programa de Pós-Graduação em Ciência Animal, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Larissa G. A. Moreira
- Programa de Pós-Graduação em Ciência Animal, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Rafael G. C. Xavier
- Programa de Pós-Graduação em Ciência Animal, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Felipe Pierezan
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Renato L. Santos
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Francisco C. F. Lobato
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Rodrigo O. S. Silva
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Paula R. Giaretta
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, USA
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Savage HP, Bays DJ, Gonzalez MAF, Bejarano EJ, Nguyen H, Masson HLP, Carvalho TP, Santos RL, Thompson GR, Bäumler AJ. 5-ASA can functionally replace Clostridia to prevent a post-antibiotic bloom of Candida albicans by maintaining epithelial hypoxia. bioRxiv 2023:2023.04.17.537218. [PMID: 37131682 PMCID: PMC10153110 DOI: 10.1101/2023.04.17.537218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Antibiotic prophylaxis sets the stage for an intestinal bloom of Candida albicans , which can progress to invasive candidiasis in patients with hematologic malignancies. Commensal bacteria can reestablish microbiota-mediated colonization resistance after completion of antibiotic therapy, but they cannot engraft during antibiotic prophylaxis. Here we use a mouse model to provide a proof of concept for an alternative approach, which replaces commensal bacteria functionally with drugs to restore colonization resistance against C. albicans . Streptomycin treatment, which depletes Clostridia from the gut microbiota, disrupted colonization resistance against C. albicans and increased epithelial oxygenation in the large intestine. Inoculating mice with a defined community of commensal Clostridia species reestablished colonization resistance and restored epithelial hypoxia. Notably, these functions of commensal Clostridia species could be replaced functionally with the drug 5-aminosalicylic acid (5-ASA), which activates mitochondrial oxygen consumption in the epithelium of the large intestine. When streptomycin-treated mice received 5-ASA, the drug reestablished colonization resistance against C. albicans and restored physiological hypoxia in the epithelium of the large intestine. We conclude that 5-ASA treatment is a non-biotic intervention that restores colonization resistance against C. albicans without requiring the administration of live bacteria.
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Oliveira AR, Ritter JM, Santos DO, Lucena FP, Carvalho TP, Moreira LGA, Vasconcelos IM, Costa FB, Paixão TA, Santos RL. Prevalence of Platynosomum spp infection and its association with biliary lithiasis and secondary bacterial infections in free-ranging marmosets (Callithrix spp) of the Brazilian Atlantic Forest. J Comp Pathol 2023; 200:59-66. [PMID: 36652777 DOI: 10.1016/j.jcpa.2022.12.003] [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: 06/29/2022] [Revised: 07/25/2022] [Accepted: 11/16/2022] [Indexed: 01/18/2023]
Abstract
Platynosomosis is a parasitic disease caused by a trematode of the genus Platynosomum, a bile duct and gallbladder fluke that has been described in captive neotropical primates (New World primates; NWPs) and causes high morbidity and variable mortality. Although it is a major concern for ex-situ conservation of these animals, there are only a few studies of platynosomosis in free-ranging NWPs. Therefore, the aim of this study was to characterize platynosomosis in a free-ranging population of marmosets (Callithrix spp) from the Brazilian Atlantic Forest, focusing on the epidemiological and pathological aspects of the disease. A total of 1,001 marmosets were evaluated and on the basis of clinicoepidemiological data, histopathology, histochemistry and immunohistochemistry, we concluded that Platynosomum spp infection has a prevalence of 8.9% (confidence interval: 7.3-10.8%) in free-ranging marmosets, with a higher frequency in the Metropolitan Region of Rio de Janeiro. Infection was associated with fibrosing and proliferative cholangiohepatitis associated with biliary lithiasis (3.0% of cases) and secondary bacterial infections (14.6% of cases).
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Affiliation(s)
- Ayisa R Oliveira
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Jana M Ritter
- Infectious Diseases Pathology Branch, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Daniel O Santos
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Fabiana P Lucena
- Setor de Anatomia Patológica, Instituto Municipal de Medicina Veterinária Jorge Vaistman, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Thaynara P Carvalho
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Larissa G A Moreira
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Izabela Ma Vasconcelos
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Fabíola B Costa
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Tatiane A Paixão
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Renato L Santos
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
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10
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Taylor SJ, Winter MG, Gillis CC, Silva LAD, Dobbins AL, Muramatsu MK, Jimenez AG, Chanin RB, Spiga L, Llano EM, Rojas VK, Kim J, Santos RL, Zhu W, Winter SE. Colonocyte-derived lactate promotes E. coli fitness in the context of inflammation-associated gut microbiota dysbiosis. Microbiome 2022; 10:200. [PMID: 36434690 PMCID: PMC9701030 DOI: 10.1186/s40168-022-01389-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 10/12/2022] [Indexed: 05/09/2023]
Abstract
BACKGROUND Intestinal inflammation disrupts the microbiota composition leading to an expansion of Enterobacteriaceae family members (dysbiosis). Associated with this shift in microbiota composition is a profound change in the metabolic landscape of the intestine. It is unclear how changes in metabolite availability during gut inflammation impact microbial and host physiology. RESULTS We investigated microbial and host lactate metabolism in murine models of infectious and non-infectious colitis. During inflammation-associated dysbiosis, lactate levels in the gut lumen increased. The disease-associated spike in lactate availability was significantly reduced in mice lacking the lactate dehydrogenase A subunit in intestinal epithelial cells. Commensal E. coli and pathogenic Salmonella, representative Enterobacteriaceae family members, utilized lactate via the respiratory L-lactate dehydrogenase LldD to increase fitness. Furthermore, mice lacking the lactate dehydrogenase A subunit in intestinal epithelial cells exhibited lower levels of inflammation in a model of non-infectious colitis. CONCLUSIONS The release of lactate by intestinal epithelial cells during gut inflammation impacts the metabolism of gut-associated microbial communities. These findings suggest that during intestinal inflammation and dysbiosis, changes in metabolite availability can perpetuate colitis-associated disturbances of microbiota composition. Video Abstract.
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Affiliation(s)
- Savannah J Taylor
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Maria G Winter
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX, USA
- Present Address: Department of Internal Medicine, Division of Infectious Diseases, UC Davis Health, Davis, CA, 95616, USA
| | - Caroline C Gillis
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX, USA
- Present Address: Novome Biotechnologies, South San Francisco, CA, 94080, USA
| | - Laice Alves da Silva
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270, Brazil
| | - Amanda L Dobbins
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Matthew K Muramatsu
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX, USA
- Present Address: Department of Internal Medicine, Division of Infectious Diseases, UC Davis Health, Davis, CA, 95616, USA
| | - Angel G Jimenez
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX, USA
- Present Address: Infectious Diseases, Genentech, South San Francisco, CA, 94080, USA
| | - Rachael B Chanin
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX, USA
- Present Address: Department of Medicine, Hematology, Blood and Marrow Transplantation, Stanford University, Stanford, CA, USA
| | - Luisella Spiga
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, USA
| | - Ernesto M Llano
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Vivian K Rojas
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX, USA
- Present Address: Department of Internal Medicine, Division of Infectious Diseases, UC Davis Health, Davis, CA, 95616, USA
| | - Jiwoong Kim
- Department of Population and Data Sciences, UT Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Renato L Santos
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270, Brazil
| | - Wenhan Zhu
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, USA
| | - Sebastian E Winter
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX, USA.
- Present Address: Department of Internal Medicine, Division of Infectious Diseases, UC Davis Health, Davis, CA, 95616, USA.
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11
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Pereira FMAM, Oliveira ARD, Soares-Neto LL, Munhoz L, Fernandes LS, Santos DOD, Carvalho TPD, Langoni H, Santos RL. Rabies in a Captive Lowland Tapir (Tapirus terrestris). J Comp Pathol 2022; 198:29-32. [PMID: 36116889 DOI: 10.1016/j.jcpa.2022.07.008] [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: 06/18/2022] [Revised: 06/22/2022] [Accepted: 07/29/2022] [Indexed: 11/16/2022]
Abstract
Rabies is a severe viral zoonosis of mammals and causes irreversible neurological damage. We describe the clinical presentation and anatomopathological lesions of rabies in a captive lowland tapir (Tapirus terrestris) in Bauru, São Paulo State, Brazil. The clinical course of the disease lasted 6 days and was characterized by progressive neurological deterioration and death. The main anatomopathological findings were non-suppurative encephalitis and presence of Negri bodies within neurons. Direct immunofluorescence and mouse inoculation tests were positive for rabies virus. This is the first report of rabies in a lowland tapir and highlights the importance of disease prevention under managed care and continuous control measures in urbanized environments.
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Affiliation(s)
| | - Ayisa R de Oliveira
- Departamento de Clínica e Cirurgia, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | - Laura Munhoz
- Zoológico Municipal de Bauru, Bauru, São Paulo, Brazil
| | | | - Daniel O Dos Santos
- Departamento de Clínica e Cirurgia, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Thaynara P de Carvalho
- Departamento de Clínica e Cirurgia, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Helio Langoni
- Departamento de Produção Animal e Medicina Veterinária Preventiva, Faculdade de Medicina Veterinária e Zootecnia, Universidade Estadual Paulista, Botucatu, São Paulo, Brazil
| | - Renato L Santos
- Departamento de Clínica e Cirurgia, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
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12
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Spiga L, Jimenez AG, Santos RL, Winter SE. How microbiological tests reflect bacterial pathogenesis and host adaptation. Braz J Microbiol 2021; 52:1745-1753. [PMID: 34251610 PMCID: PMC8578236 DOI: 10.1007/s42770-021-00571-7] [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: 01/18/2021] [Accepted: 06/29/2021] [Indexed: 10/20/2022] Open
Abstract
Historically, clinical microbiological laboratories have often relied on isolation of pure cultures and phenotypic testing to identify microorganisms. These clinical tests are often based on specific biochemical reactions, growth characteristics, colony morphology, and other physiological aspects. The features used for identification in clinical laboratories are highly conserved and specific for a given group of microbes. We speculate that these features might be the result of evolutionary selection and thus may reflect aspects of the life cycle of the organism and pathogenesis. Indeed, several of the metabolic pathways targeted by diagnostic tests in some cases may represent mechanisms for host colonization or pathogenesis. Examples include, but are not restricted to, Staphylococcus aureus, Pseudomonas aeruginosa, Klebsiella pneumoniae, Salmonella enterica, Shigella spp., and enteroinvasive Escherichia coli (EIEC). Here, we provide an overview of how some common tests reflect molecular mechanisms of bacterial pathogenesis.
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Affiliation(s)
- Luisella Spiga
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Angel G Jimenez
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Renato L Santos
- Departamento de Clínica E Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Sebastian E Winter
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX, USA.
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13
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Meuten DJ, Moore FM, Donovan TA, Bertram CA, Klopfleisch R, Foster RA, Smedley RC, Dark MJ, Milovancev M, Stromberg P, Williams BH, Aubreville M, Avallone G, Bolfa P, Cullen J, Dennis MM, Goldschmidt M, Luong R, Miller AD, Miller MA, Munday JS, Roccabianca P, Salas EN, Schulman FY, Laufer-Amorim R, Asakawa MG, Craig L, Dervisis N, Esplin DG, George JW, Hauck M, Kagawa Y, Kiupel M, Linder K, Meichner K, Marconato L, Oblak ML, Santos RL, Simpson RM, Tvedten H, Whitley D. International Guidelines for Veterinary Tumor Pathology: A Call to Action. Vet Pathol 2021; 58:766-794. [PMID: 34282984 DOI: 10.1177/03009858211013712] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Standardization of tumor assessment lays the foundation for validation of grading systems, permits reproducibility of oncologic studies among investigators, and increases confidence in the significance of study results. Currently, there is minimal methodological standardization for assessing tumors in veterinary medicine, with few attempts to validate published protocols and grading schemes. The current article attempts to address these shortcomings by providing standard guidelines for tumor assessment parameters and protocols for evaluating specific tumor types. More detailed information is available in the Supplemental Files, the intention of which is 2-fold: publication as part of this commentary, but more importantly, these will be available as "living documents" on a website (www.vetcancerprotocols.org), which will be updated as new information is presented in the peer-reviewed literature. Our hope is that veterinary pathologists will agree that this initiative is needed, and will contribute to and utilize this information for routine diagnostic work and oncologic studies. Journal editors and reviewers can utilize checklists to ensure publications include sufficient detail and standardized methods of tumor assessment. To maintain the relevance of the guidelines and protocols, it is critical that the information is periodically updated and revised as new studies are published and validated with the intent of providing a repository of this information. Our hope is that this initiative (a continuation of efforts published in this journal in 2011) will facilitate collaboration and reproducibility between pathologists and institutions, increase case numbers, and strengthen clinical research findings, thus ensuring continued progress in veterinary oncologic pathology and improving patient care.
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Affiliation(s)
| | | | | | - Christof A Bertram
- Freie Universität Berlin, Berlin, Germany.,University of Veterinary Medicine, Vienna, Austria
| | | | | | | | | | | | | | | | | | | | - Pompei Bolfa
- Ross University, Basseterre, Saint Kitts and Nevis
| | - John Cullen
- North Carolina State University, Raleigh, NC, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | - Nick Dervisis
- VA-MD College of Veterinary Medicine, Blacksburg, VA, USA
| | | | | | | | | | | | - Keith Linder
- North Carolina State University, Raleigh, NC, USA
| | | | | | | | - Renato L Santos
- Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - R Mark Simpson
- Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA
| | - Harold Tvedten
- Swedish University of Agricultural Sciences, Uppsala, Sweden
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14
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Pereira FM, de Oliveira AR, Melo ES, Soares-Neto LL, Mangueira DK, Dos Santos DO, de Carvalho TP, Momo C, Santos RL. Naturally Acquired Infectious Canine Hepatitis in Two Captive Maned Wolf (Chrysocyon brachyurus) Puppies. J Comp Pathol 2021; 186:62-68. [PMID: 34340805 DOI: 10.1016/j.jcpa.2021.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 03/24/2021] [Accepted: 05/21/2021] [Indexed: 11/19/2022]
Abstract
We report the clinicopathological manifestations of canine adenovirus type 1 (CAV 1) infection in captive-born naturally infected maned wolves (Chrysocyon brachyurus). Two 3-month-old maned wolves presented with lethargy, emesis, dehydration, pallor, hypothermia, leucocytosis, neutrophilia, lymphopaenia and thrombocytopaenia. One of the puppies died shortly after admission, with gross changes that included marked gastrointestinal petechiae, splenomegaly, hepatomegaly and pulmonary haemorrhage. Histologically, large eosinophilic intranuclear body inclusions were found in the liver and kidneys. The other wolf had elevated alkaline phosphatase, alanine aminotransferase and creatine kinase activities, and later developed anaemia, hypoalbuminaemia, bilirubinaemia, bilirubinuria, haematuria and proteinuria. Ultrasound demonstrated hepatomegaly, splenomegaly, inguinal lymphadenomegaly and lesions suggestive of gastritis and enteritis. Despite supportive treatment, the animal died. At necropsy, there was icterus, subcutaneous oedema in the inguinal region and hindlimbs, subchondral haemorrhage of articular cartilage of the femoral-tibial-patellar and tarsal joints of both hindlimbs, lymphadenomegaly, bronchopneumonia, hepatomegaly and petechiae in the gastrointestinal mucosa. Microscopically, there was a severe necrotizing hepatitis with intranuclear viral inclusions, fibrinous-necrotizing splenitis, non-suppurative meningoencephalitis and interstitial nephritis. A quantitative PCR test for CAV 1 using DNA extracted from peripheral blood was positive. The clinicopathological findings are similar to those of CAV 1 infection in dogs and other canids.
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Affiliation(s)
- Fernanda Mam Pereira
- Setor de Veterinária, Parque Zoológico Municipal de Bauru, Bauru, São Paulo, Brazil
| | - Ayisa R de Oliveira
- Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Elisa S Melo
- Setor de Veterinária, Parque Zoológico Municipal de Bauru, Bauru, São Paulo, Brazil
| | - Lauro L Soares-Neto
- Setor de Veterinária, Parque Zoológico Municipal de Bauru, Bauru, São Paulo, Brazil
| | - Danyele Ka Mangueira
- Setor de Veterinária, Parque Zoológico Municipal de Bauru, Bauru, São Paulo, Brazil
| | - Daniel O Dos Santos
- Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Thaynara P de Carvalho
- Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Claudia Momo
- Departamento de Patologia, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, Brazil
| | - Renato L Santos
- Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
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15
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Hughes ER, Winter MG, Alves da Silva L, Muramatsu MK, Jimenez AG, Gillis CC, Spiga L, Chanin RB, Santos RL, Zhu W, Winter SE. Reshaping of bacterial molecular hydrogen metabolism contributes to the outgrowth of commensal E. coli during gut inflammation. eLife 2021; 10:e58609. [PMID: 34085924 PMCID: PMC8177889 DOI: 10.7554/elife.58609] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 05/20/2021] [Indexed: 12/24/2022] Open
Abstract
The composition of gut-associated microbial communities changes during intestinal inflammation, including an expansion of Enterobacteriaceae populations. The mechanisms underlying microbiota changes during inflammation are incompletely understood. Here, we analyzed previously published metagenomic datasets with a focus on microbial hydrogen metabolism. The bacterial genomes in the inflamed murine gut and in patients with inflammatory bowel disease contained more genes encoding predicted hydrogen-utilizing hydrogenases compared to communities found under non-inflamed conditions. To validate these findings, we investigated hydrogen metabolism of Escherichia coli, a representative Enterobacteriaceae, in mouse models of colitis. E. coli mutants lacking hydrogenase-1 and hydrogenase-2 displayed decreased fitness during colonization of the inflamed cecum and colon. Utilization of molecular hydrogen was in part dependent on respiration of inflammation-derived electron acceptors. This work highlights the contribution of hydrogenases to alterations of the gut microbiota in the context of non-infectious colitis.
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Affiliation(s)
| | - Maria G Winter
- Department of Microbiology, UT SouthwesternDallasUnited States
| | - Laice Alves da Silva
- Departamento de Clinica e Cirurgia Veterinarias, Escola de Veterinaria, Universidade Federal de Minas GeraisBelo HorizonteBrazil
| | | | - Angel G Jimenez
- Department of Microbiology, UT SouthwesternDallasUnited States
| | | | - Luisella Spiga
- Department of Microbiology, UT SouthwesternDallasUnited States
| | | | - Renato L Santos
- Departamento de Clinica e Cirurgia Veterinarias, Escola de Veterinaria, Universidade Federal de Minas GeraisBelo HorizonteBrazil
| | - Wenhan Zhu
- Department of Microbiology, UT SouthwesternDallasUnited States
| | - Sebastian E Winter
- Department of Microbiology, UT SouthwesternDallasUnited States
- Department of Immunology, UT SouthwesternDallasUnited States
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16
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Abstract
Canine brucellosis is an infectious and zoonotic disease caused by Brucella canis, which has been reported worldwide, and is a major public health concern due to close contact between dogs and humans. In dogs, canine brucellosis manifests with abortion outbreaks, reproductive failure, enlargement of lymph nodes, and occasionally affects the osteoarticular system, although the occurrence of asymptomatic infections in dogs are not uncommon. In humans, the disease is associated with a febrile syndrome, commonly with non-specific symptoms including splenomegaly, fatigue, and weakness. Infection of dogs occurs mostly by the oronasal route when in contact with contaminated tissues such as aborted fetuses, semen, urine, and vaginal secretions. In humans, contact with contaminated fluids from infected dogs is an important source of infection, and it is an occupational risk for veterinarians, breeders, laboratory workers, among other professionals who deal with infected animals or biological samples. The diagnosis in dogs is largely based on serologic methods. However, serologic diagnosis of canine brucellosis remains very challenging due to the low accuracy of available tests. Molecular diagnostic methods have been increasingly used in the past few years. Treatment of infected dogs is associated with a high frequency of relapse, and should be employed only in selected cases. Currently there are no commercially available vaccines for prevention of canine brucellosis. Therefore, development of novel and improved diagnostic methods as well as the development of efficacious and safe vaccination protocols are needed for an effective control of canine brucellosis and its associated zoonotic risk.
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Affiliation(s)
- Renato L Santos
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Tayse D Souza
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Juliana P S Mol
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Camila Eckstein
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Tatiane A Paíxão
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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17
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Chanin RB, Winter MG, Spiga L, Hughes ER, Zhu W, Taylor SJ, Arenales A, Gillis CC, Büttner L, Jimenez AG, Smoot MP, Santos RL, Winter SE. Epithelial-Derived Reactive Oxygen Species Enable AppBCX-Mediated Aerobic Respiration of Escherichia coli during Intestinal Inflammation. Cell Host Microbe 2020; 28:780-788.e5. [PMID: 33053375 DOI: 10.1016/j.chom.2020.09.005] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [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: 02/17/2020] [Revised: 07/06/2020] [Accepted: 09/03/2020] [Indexed: 12/19/2022]
Abstract
The intestinal epithelium separates host tissue and gut-associated microbial communities. During inflammation, the host releases reactive oxygen and nitrogen species as an antimicrobial response. The impact of these radicals on gut microbes is incompletely understood. We discovered that the cryptic appBCX genes, predicted to encode a cytochrome bd-II oxidase, conferred a fitness advantage for E. coli in chemical and genetic models of non-infectious colitis. This fitness advantage was absent in mice that lacked epithelial NADPH oxidase 1 (NOX1) activity. In laboratory growth experiments, supplementation with exogenous hydrogen peroxide enhanced E. coli growth through AppBCX-mediated respiration in a catalase-dependent manner. We conclude that epithelial-derived reactive oxygen species are degraded in the gut lumen, which gives rise to molecular oxygen that supports the aerobic respiration of E. coli. This work illustrates how epithelial host responses intersect with gut microbial metabolism in the context of gut inflammation.
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Affiliation(s)
- Rachael B Chanin
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Maria G Winter
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Luisella Spiga
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Elizabeth R Hughes
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Wenhan Zhu
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Savannah J Taylor
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Alexandre Arenales
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG 31270, Brazil
| | - Caroline C Gillis
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Lisa Büttner
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Angel G Jimenez
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Madeline P Smoot
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Renato L Santos
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG 31270, Brazil
| | - Sebastian E Winter
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
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18
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Santana CH, Santos DO, Trindade LM, Moreira LG, Paixão TA, Santos RL. Association of Pseudoplacentational Endometrial Hyperplasia and Pyometra in Dogs. J Comp Pathol 2020; 180:79-85. [PMID: 33222878 DOI: 10.1016/j.jcpa.2020.09.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 07/18/2020] [Accepted: 09/03/2020] [Indexed: 10/23/2022]
Abstract
Uterine inflammation is the most common and clinically relevant genital change in bitches. The aim of this study was to evaluate the association between uterine hyperplasic lesions and uterine inflammation. Uteri and ovaries from 200 bitches were sampled after elective or pathological ovariohysterectomy and histologically evaluated. Endometrial hyperplastic lesions were classified as cystic endometrial hyperplasia (CEH) or pseudoplacentational endometrial hyperplasia (PEH), whereas cases of uterine inflammation were subdivided into endometritis or pyometra. The frequency of PEH (79.4%) was significantly higher (P <0.05) than CEH (20.6%), whereas 17.5% of the animals did not have any endometrial hyperplasic lesions. There was a statistically significant association between the frequency of PEH and uterine inflammation (P <0.0001) and PEH was also significantly associated with pyometra (P <0.05). There was no significant association between CEH and uterine inflammation. There was a significant association between dioestrus and the frequencies of PEH, CEH, uterine inflammation and pyometra. However, there was no significant association between endometritis and dioestrus. These results support the recommendation that the terms 'cystic endometrial hyperplasia', 'pseudoplacentational endometrial hyperplasia' and 'pyometra' should be used separately, instead of the classical term 'cystic endometrial hyperplasia-pyometra complex'.
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Affiliation(s)
- Clarissa H Santana
- Universidade Federal de Minas Gerais, Escola de Veterinária, Departamento de Clínica e Cirurgia Veterinária, Belo Horizonte, Minas Gerais, Brazil
| | - Daniel O Santos
- Universidade Federal de Minas Gerais, Escola de Veterinária, Departamento de Clínica e Cirurgia Veterinária, Belo Horizonte, Minas Gerais, Brazil
| | - Lays M Trindade
- Universidade Federal de Minas Gerais, Escola de Veterinária, Departamento de Clínica e Cirurgia Veterinária, Belo Horizonte, Minas Gerais, Brazil
| | - Larissa Ga Moreira
- Universidade Federal de Minas Gerais, Escola de Veterinária, Departamento de Clínica e Cirurgia Veterinária, Belo Horizonte, Minas Gerais, Brazil
| | - Tatiane A Paixão
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Patologia Geral, Belo Horizonte, Minas Gerais, Brazil
| | - Renato L Santos
- Universidade Federal de Minas Gerais, Escola de Veterinária, Departamento de Clínica e Cirurgia Veterinária, Belo Horizonte, Minas Gerais, Brazil.
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Abstract
ABSTRACT: Brucellosis is a relevant zoonotic disease for which the most important tool for control is vaccination of susceptible animals. Assessment of vaccine efficacy in natural hosts is based on prevention of abortion and Brucella infection in organs of immunized animals. A meta-analysis of experimental vaccination of Brucella spp. natural hosts was performed, including 45 PubMed and/or Scopus-indexed publications, representing 116 individual experiments. Difference of risk was calculated as an indicator of protection, and a temporal analysis (1980-2016) demonstrated that experimental vaccines tested on natural hosts provided levels of protection that were stable over the past decades. The meta-regression model developed in this study included different vaccine categories (attenuated, inactivated, mutant, subunit, and vectored) considering the difference of risk as the dependent variable. The subcutaneous route of vaccination provided better protection when compared to the intramuscular and oral routes of vaccination. Surprisingly, inactivated vaccines provided better protection than live naturally attenuated vaccine strains (spontaneous mutations) that were considered the reference, whereas subunit vaccines provided lower levels of protection. This is the first meta-analysis of Brucella vaccinology in the natural hosts. These results are useful for the development of new vaccination protocols for controlling animal brucellosis.
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Eckstein C, Mol JPS, Costa FB, Nunes PP, Lima PA, Melo MM, Carvalho TP, Santos DO, Silva MF, Carvalho TF, Costa LF, Melo Júnior OAO, Giunchette RC, Paixão TA, Santos RL. Brucella ovis mutant in ABC transporter protects against Brucella canis infection in mice and it is safe for dogs. PLoS One 2020; 15:e0231893. [PMID: 32298378 PMCID: PMC7162469 DOI: 10.1371/journal.pone.0231893] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 02/22/2020] [Accepted: 04/02/2020] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND/OBJECTIVES Vaccination is the most important tool for controlling brucellosis, but currently there is no vaccine available for canine brucellosis, which is a zoonotic disease of worldwide distribution caused by Brucella canis. This study aimed to evaluate protection and immune response induced by Brucella ovis ΔabcBA (BoΔabcBA) encapsulated with alginate against the challenge with Brucella canis in mice and to assess the safety of this strain for dogs. METHODS Intracellular growth of the vaccine strain BoΔabcBA was assessed in canine and ovine macrophages. Protection induced by BoΔabcBA against virulent Brucella canis was evaluated in the mouse model. Safety of the vaccine strain BoΔabcBA was assessed in experimentally inoculated dogs. RESULTS Wild type B. ovis and B. canis had similar internalization and intracellular multiplication profiles in both canine and ovine macrophages. The BoΔabcBA strain had an attenuated phenotype in both canine and ovine macrophages. Immunization of BALB/c mice with alginate-encapsulated BoΔabcBA (108 CFU) induced lymphocyte proliferation, production of IL-10 and IFN-γ, and protected against experimental challenge with B. canis. Dogs immunized with alginate-encapsulated BoΔabcBA (109 CFU) seroconverted, and had no hematologic, biochemical or clinical changes. Furthermore, BoΔabcBA was not detected by isolation or PCR performed using blood, semen, urine samples or vaginal swabs at any time point over the course of this study. BoΔabcBA was isolated from lymph nodes near to the site of inoculation in two dogs at 22 weeks post immunization. CONCLUSION Encapsulated BoΔabcBA protected mice against experimental B. canis infection, and it is safe for dogs. Therefore, B. ovis ΔabcBA has potential as a vaccine candidate for canine brucellosis prevention.
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Affiliation(s)
- Camila Eckstein
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Juliana P. S. Mol
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Fabíola B. Costa
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Philipe P. Nunes
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Pâmela A. Lima
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Marília M. Melo
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Thaynara P. Carvalho
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Daniel O. Santos
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Monique F. Silva
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Tatiane F. Carvalho
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Luciana F. Costa
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Otoni A. O. Melo Júnior
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Rodolfo C. Giunchette
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Tatiane A. Paixão
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Renato L. Santos
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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Carvalho TP, Ribeiro NQ, Mol JP, Costa FB, Eckstein C, Paula NF, Paixão TA, Santos RL. Pathogenic potential of Brucella ovis field isolates with different genotypic profile and protection provided by the vaccine strain B. ovis ΔabcBA against B. ovis field isolates in mice. Pesq Vet Bras 2020. [DOI: 10.1590/1678-5150-pvb-6481] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
ABSTRACT: Brucella ovis causes economic and reproductive losses in sheep herds. The goal of this study was to characterize infection with B. ovis field isolates in a murine model, and to evaluate protection induced by the candidate vaccine strain B. ovis ΔabcBA in mice challenged with these field isolates. B. ovis field strains were able to colonize and cause lesions in the liver and spleen of infected mice. After an initial screening, two strains were selected for further characterization (B. ovis 94 AV and B. ovis 266 L). Both strains had in vitro growth kinetics that was similar to that of the reference strain B. ovis ATCC 25840. Vaccination with B. ovis ΔabcBA encapsulated with 1% alginate was protective against the challenge with field strains, with the following protection indexes: 0.751, 1.736, and 2.746, for mice challenged with B. ovis ATCC25840, B. ovis 94 AV, and B. ovis 266 L, respectively. In conclusion, these results demonstrated that B. ovis field strains were capable of infecting and inducing lesions in experimentally infected mice. The attenuated vaccine strain B. ovis ΔabcBA induced protection in mice challenged with different B. ovis field isolates, resulting in higher protection indexes against more pathogenic strains.
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22
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Mol JPS, Guedes ACB, Eckstein C, Quintal APN, Souza TD, Mathias LA, Haddad JPA, Paixão TA, Santos RL. Diagnosis of canine brucellosis: comparison of various serologic tests and PCR. J Vet Diagn Invest 2020; 32:77-86. [PMID: 31752635 PMCID: PMC7003229 DOI: 10.1177/1040638719891083] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [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: 11/15/2022] Open
Abstract
Canine brucellosis is an infectious and contagious disease associated with reproductive losses in breeding kennels. As a zoonotic disease, it poses a risk to human health, especially for veterinarians and breeders who handle materials potentially contaminated with Brucella canis. However, canine brucellosis is a neglected and underestimated disease given the difficulties in establishing a definitive diagnosis. We evaluated the frequency of detection of B. canis in 5 breeding kennels by using various serologic methods and PCR. Circulation of B. canis in these kennels was confirmed by bacterial isolation. The frequency of positive serologic results varied from 6.3% by AGID to 16.5% by dot-ELISA. There was no positive serology for smooth Brucella. PCR testing was positive in 13.9% of samples. The only detection tests with reasonable agreement were PCR and 2ME-MAT. The diagnosis of canine brucellosis remains challenging. The use of a single laboratory method, or even the use of different laboratory methods, may not be sufficient to reach a definitive diagnosis.
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Affiliation(s)
- Juliana P. S. Mol
- Departamentos de Clínica e Cirurgia Veterinárias (Mol, Guedes, Eckstein, Quintal, Souza, Santos), Universidade Federal de Minas Gerais, Brazil
- de Medicina Veterinária Preventiva (Haddad), Universidade Federal de Minas Gerais, Brazil
- Escola de Veterinária, and Departamento de Patologia Geral, Instituto de Ciências Biológicas (Paixão), Universidade Federal de Minas Gerais, Brazil
- Curso de Medicina Veterinária, Universidade Vila Velha, Vila Velha, Espírito Santo, Brazil (Souza)
- Departamento de Medicina Veterinária Preventiva e Reprodução Animal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, São Paulo, Brazil (Mathias)
| | - Andressa C. B. Guedes
- Departamentos de Clínica e Cirurgia Veterinárias (Mol, Guedes, Eckstein, Quintal, Souza, Santos), Universidade Federal de Minas Gerais, Brazil
- de Medicina Veterinária Preventiva (Haddad), Universidade Federal de Minas Gerais, Brazil
- Escola de Veterinária, and Departamento de Patologia Geral, Instituto de Ciências Biológicas (Paixão), Universidade Federal de Minas Gerais, Brazil
- Curso de Medicina Veterinária, Universidade Vila Velha, Vila Velha, Espírito Santo, Brazil (Souza)
- Departamento de Medicina Veterinária Preventiva e Reprodução Animal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, São Paulo, Brazil (Mathias)
| | - Camila Eckstein
- Departamentos de Clínica e Cirurgia Veterinárias (Mol, Guedes, Eckstein, Quintal, Souza, Santos), Universidade Federal de Minas Gerais, Brazil
- de Medicina Veterinária Preventiva (Haddad), Universidade Federal de Minas Gerais, Brazil
- Escola de Veterinária, and Departamento de Patologia Geral, Instituto de Ciências Biológicas (Paixão), Universidade Federal de Minas Gerais, Brazil
- Curso de Medicina Veterinária, Universidade Vila Velha, Vila Velha, Espírito Santo, Brazil (Souza)
- Departamento de Medicina Veterinária Preventiva e Reprodução Animal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, São Paulo, Brazil (Mathias)
| | - Amanda P. N. Quintal
- Departamentos de Clínica e Cirurgia Veterinárias (Mol, Guedes, Eckstein, Quintal, Souza, Santos), Universidade Federal de Minas Gerais, Brazil
- de Medicina Veterinária Preventiva (Haddad), Universidade Federal de Minas Gerais, Brazil
- Escola de Veterinária, and Departamento de Patologia Geral, Instituto de Ciências Biológicas (Paixão), Universidade Federal de Minas Gerais, Brazil
- Curso de Medicina Veterinária, Universidade Vila Velha, Vila Velha, Espírito Santo, Brazil (Souza)
- Departamento de Medicina Veterinária Preventiva e Reprodução Animal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, São Paulo, Brazil (Mathias)
| | - Tayse D. Souza
- Departamentos de Clínica e Cirurgia Veterinárias (Mol, Guedes, Eckstein, Quintal, Souza, Santos), Universidade Federal de Minas Gerais, Brazil
- de Medicina Veterinária Preventiva (Haddad), Universidade Federal de Minas Gerais, Brazil
- Escola de Veterinária, and Departamento de Patologia Geral, Instituto de Ciências Biológicas (Paixão), Universidade Federal de Minas Gerais, Brazil
- Curso de Medicina Veterinária, Universidade Vila Velha, Vila Velha, Espírito Santo, Brazil (Souza)
- Departamento de Medicina Veterinária Preventiva e Reprodução Animal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, São Paulo, Brazil (Mathias)
| | - Luis A. Mathias
- Departamentos de Clínica e Cirurgia Veterinárias (Mol, Guedes, Eckstein, Quintal, Souza, Santos), Universidade Federal de Minas Gerais, Brazil
- de Medicina Veterinária Preventiva (Haddad), Universidade Federal de Minas Gerais, Brazil
- Escola de Veterinária, and Departamento de Patologia Geral, Instituto de Ciências Biológicas (Paixão), Universidade Federal de Minas Gerais, Brazil
- Curso de Medicina Veterinária, Universidade Vila Velha, Vila Velha, Espírito Santo, Brazil (Souza)
- Departamento de Medicina Veterinária Preventiva e Reprodução Animal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, São Paulo, Brazil (Mathias)
| | - João Paulo A. Haddad
- Departamentos de Clínica e Cirurgia Veterinárias (Mol, Guedes, Eckstein, Quintal, Souza, Santos), Universidade Federal de Minas Gerais, Brazil
- de Medicina Veterinária Preventiva (Haddad), Universidade Federal de Minas Gerais, Brazil
- Escola de Veterinária, and Departamento de Patologia Geral, Instituto de Ciências Biológicas (Paixão), Universidade Federal de Minas Gerais, Brazil
- Curso de Medicina Veterinária, Universidade Vila Velha, Vila Velha, Espírito Santo, Brazil (Souza)
- Departamento de Medicina Veterinária Preventiva e Reprodução Animal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, São Paulo, Brazil (Mathias)
| | - Tatiane A. Paixão
- Departamentos de Clínica e Cirurgia Veterinárias (Mol, Guedes, Eckstein, Quintal, Souza, Santos), Universidade Federal de Minas Gerais, Brazil
- de Medicina Veterinária Preventiva (Haddad), Universidade Federal de Minas Gerais, Brazil
- Escola de Veterinária, and Departamento de Patologia Geral, Instituto de Ciências Biológicas (Paixão), Universidade Federal de Minas Gerais, Brazil
- Curso de Medicina Veterinária, Universidade Vila Velha, Vila Velha, Espírito Santo, Brazil (Souza)
- Departamento de Medicina Veterinária Preventiva e Reprodução Animal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, São Paulo, Brazil (Mathias)
| | - Renato L. Santos
- Renato L. Santos, Departamento de Clínica e Cirurgia Veterinária, Escola de Veterinária, Universidade Federal de Minas Gerais, Av. Presidente Antônio Carlos, 6627-CEP, Belo Horizonte, MG 30161-970, Brazil.
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23
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Blume GR, Eloi RSA, Silva FP, Eckstein C, Santos RL, Sant'Ana FJF. Oral Lesions in Dogs with Visceral Leishmaniosis. J Comp Pathol 2019; 171:6-11. [PMID: 31540627 DOI: 10.1016/j.jcpa.2019.06.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [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: 03/14/2019] [Revised: 06/10/2019] [Accepted: 06/25/2019] [Indexed: 02/06/2023]
Abstract
Canine visceral leishmaniosis (CVL) is an important zoonotic disease, which is endemic in Brazil and several other parts of the world. The disease may affect multiple organs, but lesions in the oral cavity are considered uncommon. Twenty-three cases of oral lesions compatible with CVL were diagnosed from 2015 to 2018 in the Federal District, Brazil. Six cases were confirmed to be CVL based on histopathology, immunohistochemistry and polymerase chain reaction amplification of Leishmania infantum kDNA. Most of the affected dogs were >9 years of age, of mixed breed and were classified as having stage C of the disease. The most important gross findings were ulcerated nodular lesions in the tongue, lip, gingiva and hard palate. Microscopically, there was lymphoplasmacytic to granulomatous inflammation that was diffuse, moderate to severe and associated with ulceration. CVL should be considered in the differential diagnosis of nodular and ulcerative oral lesions in dogs.
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Affiliation(s)
- G R Blume
- Laboratório de Diagnóstico Patológico Veterinário, Universidade de Brasília, Granja do Torto, Brazil
| | - R S A Eloi
- Laboratório Histopato-Análise Anatomopatológica Veterinária, Brazil
| | | | - C Eckstein
- Departmento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - R L Santos
- Departmento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - F J F Sant'Ana
- Laboratório de Diagnóstico Patológico Veterinário, Universidade de Brasília, Granja do Torto, Brazil.
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Zhu W, Miyata N, Winter MG, Arenales A, Hughes ER, Spiga L, Kim J, Sifuentes-Dominguez L, Starokadomskyy P, Gopal P, Byndloss MX, Santos RL, Burstein E, Winter SE. Editing of the gut microbiota reduces carcinogenesis in mouse models of colitis-associated colorectal cancer. J Exp Med 2019; 216:2378-2393. [PMID: 31358565 PMCID: PMC6781011 DOI: 10.1084/jem.20181939] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [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: 10/11/2018] [Revised: 05/28/2019] [Accepted: 07/09/2019] [Indexed: 12/13/2022] Open
Abstract
Enterobacteriaceae family members such as E. coli exacerbate development of intestinal malignancy. Zhu et al. report that targeting the metabolism of protumoral Enterobacteriaceae by tungstate prevents tumor development in murine models of colitis-associated colorectal cancer. Chronic inflammation and gut microbiota dysbiosis, in particular the bloom of genotoxin-producing E. coli strains, are risk factors for the development of colorectal cancer. Here, we sought to determine whether precision editing of gut microbiota metabolism and composition could decrease the risk for tumor development in mouse models of colitis-associated colorectal cancer (CAC). Expansion of experimentally introduced E. coli strains in the azoxymethane/dextran sulfate sodium colitis model was driven by molybdoenzyme-dependent metabolic pathways. Oral administration of sodium tungstate inhibited E. coli molybdoenzymes and selectively decreased gut colonization with genotoxin-producing E. coli and other Enterobacteriaceae. Restricting the bloom of Enterobacteriaceae decreased intestinal inflammation and reduced the incidence of colonic tumors in two models of CAC, the azoxymethane/dextran sulfate sodium colitis model and azoxymethane-treated, Il10-deficient mice. We conclude that metabolic targeting of protumoral Enterobacteriaceae during chronic inflammation is a suitable strategy to prevent the development of malignancies arising from gut microbiota dysbiosis.
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Affiliation(s)
- Wenhan Zhu
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX
| | - Naoteru Miyata
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX.,Digestive Disease Center, International University of Health and Welfare, Mita Hospital, Japan
| | - Maria G Winter
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX
| | - Alexandre Arenales
- Departamento de Clinica e Cirurgia Veterinarias, Escola de Veterinaria, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Elizabeth R Hughes
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX
| | - Luisella Spiga
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX
| | - Jiwoong Kim
- Department of Clinical Science, Quantitative Biomedical Research Center, University of Texas Southwestern Medical Center, Dallas, TX
| | | | - Petro Starokadomskyy
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX
| | - Purva Gopal
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX
| | - Mariana X Byndloss
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN
| | - Renato L Santos
- Departamento de Clinica e Cirurgia Veterinarias, Escola de Veterinaria, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Ezra Burstein
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX .,Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX
| | - Sebastian E Winter
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX
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Gillis CC, Hughes ER, Spiga L, Winter MG, Zhu W, Furtado de Carvalho T, Chanin RB, Behrendt CL, Hooper LV, Santos RL, Winter SE. Dysbiosis-Associated Change in Host Metabolism Generates Lactate to Support Salmonella Growth. Cell Host Microbe 2018; 23:570. [PMID: 29649446 DOI: 10.1016/j.chom.2018.03.013] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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26
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Gillis CC, Hughes ER, Spiga L, Winter MG, Zhu W, Furtado de Carvalho T, Chanin RB, Behrendt CL, Hooper LV, Santos RL, Winter SE. Dysbiosis-Associated Change in Host Metabolism Generates Lactate to Support Salmonella Growth. Cell Host Microbe 2017; 23:54-64.e6. [PMID: 29276172 DOI: 10.1016/j.chom.2017.11.006] [Citation(s) in RCA: 116] [Impact Index Per Article: 16.6] [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: 07/21/2017] [Revised: 10/03/2017] [Accepted: 11/13/2017] [Indexed: 12/12/2022]
Abstract
During Salmonella-induced gastroenteritis, mucosal inflammation creates a niche that favors the expansion of the pathogen population over the microbiota. Here, we show that Salmonella Typhimurium infection was accompanied by dysbiosis, decreased butyrate levels, and substantially elevated lactate levels in the gut lumen. Administration of a lactate dehydrogenase inhibitor blunted lactate production in germ-free mice, suggesting that lactate was predominantly of host origin. Depletion of butyrate-producing Clostridia, either through oral antibiotic treatment or as part of the pathogen-induced dysbiosis, triggered a switch in host cells from oxidative metabolism to lactate fermentation, increasing both lactate levels and Salmonella lactate utilization. Administration of tributyrin or a PPARγ agonist diminished host lactate production and abrogated the fitness advantage conferred on Salmonella by lactate utilization. We conclude that alterations of the gut microbiota, specifically a depletion of Clostridia, reprogram host metabolism to perform lactate fermentation, thus supporting Salmonella infection.
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Affiliation(s)
- Caroline C Gillis
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Elizabeth R Hughes
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Luisella Spiga
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Maria G Winter
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Wenhan Zhu
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Tatiane Furtado de Carvalho
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Rachael B Chanin
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Cassie L Behrendt
- Department of Immunology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Lora V Hooper
- Department of Immunology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Renato L Santos
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Sebastian E Winter
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
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Hughes ER, Winter MG, Duerkop BA, Spiga L, Furtado de Carvalho T, Zhu W, Gillis CC, Büttner L, Smoot MP, Behrendt CL, Cherry S, Santos RL, Hooper LV, Winter SE. Microbial Respiration and Formate Oxidation as Metabolic Signatures of Inflammation-Associated Dysbiosis. Cell Host Microbe 2017; 21:208-219. [PMID: 28182951 DOI: 10.1016/j.chom.2017.01.005] [Citation(s) in RCA: 198] [Impact Index Per Article: 28.3] [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: 08/16/2016] [Revised: 11/16/2016] [Accepted: 01/03/2017] [Indexed: 12/16/2022]
Abstract
Intestinal inflammation is frequently associated with an alteration of the gut microbiota, termed dysbiosis, which is characterized by a reduced abundance of obligate anaerobic bacteria and an expansion of facultative Proteobacteria such as commensal E. coli. The mechanisms enabling the outgrowth of Proteobacteria during inflammation are incompletely understood. Metagenomic sequencing revealed bacterial formate oxidation and aerobic respiration to be overrepresented metabolic pathways in a chemically induced murine model of colitis. Dysbiosis was accompanied by increased formate levels in the gut lumen. Formate was of microbial origin since no formate was detected in germ-free mice. Complementary studies using commensal E. coli strains as model organisms indicated that formate dehydrogenase and terminal oxidase genes provided a fitness advantage in murine models of colitis. In vivo, formate served as electron donor in conjunction with oxygen as the terminal electron acceptor. This work identifies bacterial formate oxidation and oxygen respiration as metabolic signatures for inflammation-associated dysbiosis.
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Affiliation(s)
- Elizabeth R Hughes
- Department of Microbiology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Maria G Winter
- Department of Microbiology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Breck A Duerkop
- Department of Immunology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Luisella Spiga
- Department of Microbiology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Tatiane Furtado de Carvalho
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, 31270 Brazil
| | - Wenhan Zhu
- Department of Microbiology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Caroline C Gillis
- Department of Microbiology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Lisa Büttner
- Department of Microbiology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Madeline P Smoot
- Department of Microbiology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Cassie L Behrendt
- Department of Immunology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Sara Cherry
- Department of Microbiology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA
| | - Renato L Santos
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, 31270 Brazil
| | - Lora V Hooper
- Department of Immunology, UT Southwestern Medical Center, Dallas, TX 75390, USA; Howard Hughes Medical Institute, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Sebastian E Winter
- Department of Microbiology, UT Southwestern Medical Center, Dallas, TX 75390, USA.
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Spiga L, Winter MG, Furtado de Carvalho T, Zhu W, Hughes ER, Gillis CC, Behrendt CL, Kim J, Chessa D, Andrews-Polymenis HL, Beiting DP, Santos RL, Hooper LV, Winter SE. An Oxidative Central Metabolism Enables Salmonella to Utilize Microbiota-Derived Succinate. Cell Host Microbe 2017; 22:291-301.e6. [PMID: 28844888 DOI: 10.1016/j.chom.2017.07.018] [Citation(s) in RCA: 99] [Impact Index Per Article: 14.1] [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: 07/15/2016] [Revised: 06/23/2017] [Accepted: 07/28/2017] [Indexed: 12/31/2022]
Abstract
The mucosal inflammatory response induced by Salmonella serovar Typhimurium creates a favorable niche for this gut pathogen. Conventional wisdom holds that S. Typhimurium undergoes an incomplete tricarboxylic acid (TCA) cycle in the anaerobic mammalian gut. One change during S. Typhimurium-induced inflammation is the production of oxidized compounds by infiltrating neutrophils. We show that inflammation-derived electron acceptors induce a complete, oxidative TCA cycle in S. Typhimurium, allowing the bacteria to compete with the microbiota for colonization. A complete TCA cycle facilitates utilization of the microbiota-derived fermentation product succinate as a carbon source. S. Typhimurium succinate utilization genes contribute to efficient colonization in conventionally raised mice, but provide no growth advantage in germ-free mice. Mono-association of gnotobiotic mice with Bacteroides, a major succinate producer, restores succinate utilization in S. Typhimurium. Thus, oxidative central metabolism enables S. Typhimurium to utilize a variety of carbon sources, including microbiota-derived succinate.
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Affiliation(s)
- Luisella Spiga
- Department of Microbiology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Maria G Winter
- Department of Microbiology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Tatiane Furtado de Carvalho
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Wenhan Zhu
- Department of Microbiology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Elizabeth R Hughes
- Department of Microbiology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Caroline C Gillis
- Department of Microbiology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Cassie L Behrendt
- Department of Immunology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Jiwoong Kim
- Department of Clinical Science, Quantitative Biomedical Research Center, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Daniela Chessa
- Department of Biomedical Science, School of Medicine, University of Sassari, Sassari, Italy
| | - Helene L Andrews-Polymenis
- Department of Microbial Pathogenesis and Immunology, College of Medicine, Texas A&M University System Health Science Center, Bryan, TX 77807, USA
| | - Daniel P Beiting
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Renato L Santos
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Lora V Hooper
- Department of Immunology, UT Southwestern Medical Center, Dallas, TX 75390, USA; Howard Hughes Medical Institute, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Sebastian E Winter
- Department of Microbiology, UT Southwestern Medical Center, Dallas, TX 75390, USA.
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Almeida AC, Andrade VA, Fonseca FS, Macêdo AA, Santos RL, Colen KG, Martins ER, Marcelo NA. Acute and chronic toxicity and antimicrobial activity of the extract of Stryphnodendron adstringens (Mart.) Coville. Pesq Vet Bras 2017. [DOI: 10.1590/s0100-736x2017000800010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
ABSTRACT: This study evaluated the antimicrobial activity and acute or chronic toxicity of the extract of Stryphnodendron adstringens. The stem bark dry extract was obtained by static maceration with ethanol. Quantification of tannins was performed by the Folin-Denis method, which indicated a total tannin content of 32.7%. The antimicrobial activity of the dry extract of S. adstringens was evaluated by agar-based disk diffusion assay with Escherichia coli (ATCC 25922) and Staphylococcus aureus (ATCC 25923) in the concentration of 200, 400 and 600μL/mL. The results indicated that 600μL/mL inhibited microbial growth, i.e. had antimicrobial activity against these species. Acute and chronic toxic effects of S. adstringens was evaluated in Wistar rats treated with 200, 400, 600 and 800mg/kg of extract, administrated by gavage. Liver degeneration was observed in the group of rats receiving 800mg/kg in chronic exposure, what may indicate some degree of toxicity at this concentration. However, no systemic toxicity was observed at lower doses. Considering the broad use of S. adstringens as a phytotherapeutic agent for various human and animal diseases and the livertoxicity observed at high concentrations, attention should be paid to the possible adverse effect of using the extract from this plant at high concentration.
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Affiliation(s)
| | - Viviane A. Andrade
- Instituto Federal de Educação, Ciência e Tecnologia do Norte de Minas Gerais, Brazil
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Rocha CE, Mol JPS, Garcia LNN, Costa LF, Santos RL, Paixão TA. Comparative experimental infection of Listeria monocytogenes and Listeria ivanovii in bovine trophoblasts. PLoS One 2017; 12:e0176911. [PMID: 28467447 PMCID: PMC5415186 DOI: 10.1371/journal.pone.0176911] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Accepted: 04/19/2017] [Indexed: 12/29/2022] Open
Abstract
Listeria monocytogenes is a Gram-positive, facultative intracellular and invasive bacterium that has tropism to the placenta, and causes fetal morbidity and mortality in several mammalian species. While infection with L. monocytogenes and L. ivanovii are known as important causes of abortion and reproductive failure in cattle, the pathogenesis of maternal-fetal listeriosis in this species is poorly known. This study used the bovine chorioallantoic membrane explant model to investigate the kinetics of L. monocytogenes, L. ivanovii, and L. innocua infections in bovine trophoblastic cells for up to 8 h post infection. L. monocytogenes and L. ivanovii were able to invade and multiply in trophoblastic cells without causing cell death or inducing expression of pro-inflammatory genes. Although L. innocua was unable to multiply in bovine trophoblastic cells, it induced transcription of the pro-inflammatory mediator CXCL6. This study demonstrated for the first time the susceptibility of bovine trophoblastic cells to L. monocytogenes and L. ivanovii infection.
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Affiliation(s)
- Cláudia E. Rocha
- Departamento de Patologia Geral, Instituto de Ciências Biológicas da Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Juliana P. S. Mol
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária da Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Luize N. N. Garcia
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária da Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Luciana F. Costa
- Departamento de Patologia Geral, Instituto de Ciências Biológicas da Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Renato L. Santos
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária da Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Tatiane A. Paixão
- Departamento de Patologia Geral, Instituto de Ciências Biológicas da Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- * E-mail:
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Claudio ERG, Almeida SA, Mengal V, Brasil GA, Santuzzi CH, Tiradentes RV, Gouvea SA, Bissoli NS, Santos RL, Abreu GR. Swimming training prevents coronary endothelial dysfunction in ovariectomized spontaneously hypertensive rats. ACTA ACUST UNITED AC 2017; 50:e5495. [PMID: 28099583 PMCID: PMC5264533 DOI: 10.1590/1414-431x20165495] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [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: 06/17/2016] [Accepted: 11/10/2016] [Indexed: 11/22/2022]
Abstract
Estrogen deficiency and hypertension are considered major risk factors for the
development of coronary heart disease. On the other hand, exercise training is
considered an effective form to prevent and treat cardiovascular diseases. However,
the effects of swimming training (SW) on coronary vascular reactivity in female
ovariectomized hypertensive rats are not known. We aimed to evaluate the effects of
SW on endothelium-dependent coronary vasodilation in ovariectomized hypertensive
rats. Three-month old spontaneously hypertensive rats (SHR, n=50) were divided into
four groups: sham (SH), sham plus swimming training (SSW), ovariectomized (OVX), and
ovariectomized plus swimming training (OSW). The SW protocol (5 times/week, 60
min/day) was conducted for 8 weeks. The vasodilatory response was measured in
isolated hearts in the absence and presence of a nitric oxide synthase inhibitor
(L-NAME, 100 µM). Cardiac oxidative stress was evaluated in situ by
dihydroethidium fluorescence, while the expression of antioxidant enzymes (SOD-2 and
catalase) and their activities were assessed by western blotting and
spectrophotometry, respectively. Vasodilation in SHR was significantly reduced by
OVX, even in the presence of L-NAME, in conjunction with an increased oxidative
stress. These effects were prevented by SW, and were associated with a decrease in
oxidative stress. Superoxide dismutase 2 (SOD-2) and catalase expression increased
only in the OSW group. However, no significant difference was found in the activity
of these enzymes. In conclusion, SW prevented the endothelial dysfunction in the
coronary bed of ovariectomized SHR associated with an increase in the expression of
antioxidant enzymes, and therefore may prevent coronary heart disease in hypertensive
postmenopausal women.
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Affiliation(s)
- E R G Claudio
- Departamento de Ciências Fisiológicas, Centro de Ciências da Saúde, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - S A Almeida
- Departamento de Ciências Fisiológicas, Centro de Ciências da Saúde, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - V Mengal
- Departamento de Ciências Fisiológicas, Centro de Ciências da Saúde, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - G A Brasil
- Departamento de Ciências Fisiológicas, Centro de Ciências da Saúde, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - C H Santuzzi
- Departamento de Ciências Fisiológicas, Centro de Ciências da Saúde, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - R V Tiradentes
- Departamento de Ciências Fisiológicas, Centro de Ciências da Saúde, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - S A Gouvea
- Departamento de Ciências Fisiológicas, Centro de Ciências da Saúde, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - N S Bissoli
- Departamento de Ciências Fisiológicas, Centro de Ciências da Saúde, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - R L Santos
- Departamento de Ciências Fisiológicas, Centro de Ciências da Saúde, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - G R Abreu
- Departamento de Ciências Fisiológicas, Centro de Ciências da Saúde, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
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Borgo MV, Claudio ERG, Silva FB, Romero WG, Gouvea SA, Moysés MR, Santos RL, Almeida SA, Podratz PL, Graceli JB, Abreu GR. Hormonal therapy with estradiol and drospirenone improves endothelium-dependent vasodilation in the coronary bed of ovariectomized spontaneously hypertensive rats. ACTA ACUST UNITED AC 2016; 49:e4655. [PMID: 26577845 PMCID: PMC4678653 DOI: 10.1590/1414-431x20154655] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [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: 01/16/2015] [Accepted: 06/29/2015] [Indexed: 02/07/2023]
Abstract
Drospirenone (DRSP) is a progestin with anti-aldosterone properties and it reduces
blood pressure in hypertensive women. However, the effects of DRSP on
endothelium-dependent coronary vasodilation have not been evaluated. This study
investigated the effects of combined therapy with estrogen (E2) and DRSP on
endothelium-dependent vasodilation of the coronary bed of ovariectomized (OVX)
spontaneously hypertensive rats. Female spontaneously hypertensive rats (n=87) at 12
weeks of age were randomly divided into sham operated (Sham), OVX, OVX treated with
E2 (E2), and OVX treated with E2 and DRSP (E2+DRSP) groups. Hemodynamic parameters
were directly evaluated by catheter insertion into the femoral artery.
Endothelium-dependent vasodilation in response to bradykinin in the coronary arterial
bed was assessed using isolated hearts according to a modified Langendorff method.
Coronary protein expression of endothelial nitric oxide synthase and estrogen
receptor alpha (ER-α) was assessed by Western blotting. Histological slices of
coronary arteries were stained with hematoxylin and eosin, and morphometric
parameters were analyzed. Oxidative stress was assessed in situ by
dihydroethidium fluorescence. Ovariectomy increased systolic blood pressure, which
was only prevented by E2+DRSP treatment. Estrogen deficiency caused endothelial
dysfunction, which was prevented by both treatments. However, the vasodilator
response in the E2+DRSP group was significantly higher at the three highest
concentrations compared with the OVX group. Reduced ER-α expression in OVX rats was
restored by both treatments. Morphometric parameters and oxidative stress were
augmented by OVX and reduced by E2 and E2+DRSP treatments. Hormonal therapy with E2
and DRSP may be an important therapeutic option in the prevention of coronary heart
disease in hypertensive post-menopausal women.
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Affiliation(s)
- M V Borgo
- Departamento de Ciências Fisiológicas, Centro de Ciências da Saúde, Universidade Federal de Espírito Santo, Vitória, ES, Brasil
| | - E R G Claudio
- Departamento de Ciências Fisiológicas, Centro de Ciências da Saúde, Universidade Federal de Espírito Santo, Vitória, ES, Brasil
| | - F B Silva
- Departamento de Ciências Fisiológicas, Centro de Ciências da Saúde, Universidade Federal de Espírito Santo, Vitória, ES, Brasil
| | - W G Romero
- Departamento de Ciências Fisiológicas, Centro de Ciências da Saúde, Universidade Federal de Espírito Santo, Vitória, ES, Brasil
| | - S A Gouvea
- Departamento de Ciências Fisiológicas, Centro de Ciências da Saúde, Universidade Federal de Espírito Santo, Vitória, ES, Brasil
| | - M R Moysés
- Departamento de Ciências Fisiológicas, Centro de Ciências da Saúde, Universidade Federal de Espírito Santo, Vitória, ES, Brasil
| | - R L Santos
- Departamento de Ciências Fisiológicas, Centro de Ciências da Saúde, Universidade Federal de Espírito Santo, Vitória, ES, Brasil
| | - S A Almeida
- Departamento de Ciências Fisiológicas, Centro de Ciências da Saúde, Universidade Federal de Espírito Santo, Vitória, ES, Brasil
| | - P L Podratz
- Departamento de Morfologia, Centro de Ciências da Saúde, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - J B Graceli
- Departamento de Morfologia, Centro de Ciências da Saúde, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - G R Abreu
- Departamento de Ciências Fisiológicas, Centro de Ciências da Saúde, Universidade Federal de Espírito Santo, Vitória, ES, Brasil
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Abstract
Background/Objectives In spite of all the research effort for developing new vaccines against brucellosis, it remains unclear whether these new vaccine technologies will in fact become widely used. The goal of this study was to perform a meta-analysis to identify parameters that influence vaccine efficacy as well as a descriptive analysis on how the field of Brucella vaccinology is advancing concerning type of vaccine, improvement of protection on animal models over time, and factors that may affect protection in the mouse model. Methods A total of 117 publications that met the criteria were selected for inclusion in this study, with a total of 782 individual experiments analyzed. Results Attenuated (n = 221), inactivated (n = 66) and mutant (n = 102) vaccines provided median protection index above 2, whereas subunit (n = 287), DNA (n = 68), and vectored (n = 38) vaccines provided protection indexes lower than 2. When all categories of experimental vaccines are analyzed together, the trend line clearly demonstrates that there was no improvement of the protection indexes over the past 30 years, with a low negative and non significant linear coefficient. A meta-regression model was developed including all vaccine categories (attenuated, DNA, inactivated, mutant, subunit, and vectored) considering the protection index as a dependent variable and the other parameters (mouse strain, route of vaccination, number of vaccinations, use of adjuvant, challenge Brucella species) as independent variables. Some of these variables influenced the expected protection index of experimental vaccines against Brucella spp. in the mouse model. Conclusion In spite of the large number of publication over the past 30 years, our results indicate that there is not clear trend to improve the protective potential of these experimental vaccines.
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Affiliation(s)
- Tatiane F. Carvalho
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - João Paulo A. Haddad
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Tatiane A. Paixão
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Renato L. Santos
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
- * E-mail:
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Costa LF, Mol JPS, Silva APC, Macêdo AA, Silva TMA, Alves GES, Winter S, Winter MG, Velazquez EM, Byndloss MX, Bäumler AJ, Tsolis RM, Paixão TA, Santos RL. Iron acquisition pathways and colonization of the inflamed intestine by Salmonella enterica serovar Typhimurium. Int J Med Microbiol 2016; 306:604-610. [PMID: 27760693 DOI: 10.1016/j.ijmm.2016.10.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [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: 02/17/2016] [Revised: 10/11/2016] [Accepted: 10/12/2016] [Indexed: 12/11/2022] Open
Abstract
Salmonella enterica serotype Typhimurium is able to expand in the lumen of the inflamed intestine through mechanisms that have not been fully resolved. Here we utilized streptomycin-pretreated mice and dextran sodium sulfate (DSS)-treated mice to investigate how pathways for S. Typhimurium iron acquisition contribute to pathogen expansion in the inflamed intestine. Competitive infection with an iron uptake-proficient S. Typhimurium strain and mutant strains lacking tonB feoB, feoB, tonB or iroN in streptomycin pretreated mice demonstrated that ferric iron uptake requiring IroN and TonB conferred a fitness advantage during growth in the inflamed intestine. However, the fitness advantage conferred by ferrous iron uptake mechanisms was independent of inflammation and was only apparent in models where the normal microbiota composition had been disrupted by antibiotic treatment.
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Affiliation(s)
- Luciana F Costa
- Departamento de Patologia, Instituto de Ciências Biológicas da Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Juliana P S Mol
- Departamento de Clínica e Cirurgia Veterinária, Escola de Veterinária da Universidade Federal Minas Gerais, Belo Horizonte, MG, Brazil
| | - Ana Patricia C Silva
- Departamento de Clínica e Cirurgia Veterinária, Escola de Veterinária da Universidade Federal Minas Gerais, Belo Horizonte, MG, Brazil
| | - Auricélio A Macêdo
- Departamento de Clínica e Cirurgia Veterinária, Escola de Veterinária da Universidade Federal Minas Gerais, Belo Horizonte, MG, Brazil
| | - Teane M A Silva
- Departamento de Patologia, Instituto de Ciências Biológicas da Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Geraldo E S Alves
- Departamento de Clínica e Cirurgia Veterinária, Escola de Veterinária da Universidade Federal Minas Gerais, Belo Horizonte, MG, Brazil
| | - Sebastian Winter
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Maria G Winter
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Eric M Velazquez
- Department of Medical Microbiology and Immunology, University of California at Davis, Davis, CA, USA
| | - Mariana X Byndloss
- Department of Medical Microbiology and Immunology, University of California at Davis, Davis, CA, USA
| | - Andreas J Bäumler
- Department of Medical Microbiology and Immunology, University of California at Davis, Davis, CA, USA
| | - Renée M Tsolis
- Department of Medical Microbiology and Immunology, University of California at Davis, Davis, CA, USA.
| | - Tatiane A Paixão
- Departamento de Patologia, Instituto de Ciências Biológicas da Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Renato L Santos
- Departamento de Clínica e Cirurgia Veterinária, Escola de Veterinária da Universidade Federal Minas Gerais, Belo Horizonte, MG, Brazil.
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35
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Mol JPS, Pires SF, Chapeaurouge AD, Perales J, Santos RL, Andrade HM, Lage AP. Proteomic Profile of Brucella abortus-Infected Bovine Chorioallantoic Membrane Explants. PLoS One 2016; 11:e0154209. [PMID: 27104343 PMCID: PMC4841507 DOI: 10.1371/journal.pone.0154209] [Citation(s) in RCA: 7] [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: 01/25/2016] [Accepted: 04/11/2016] [Indexed: 12/20/2022] Open
Abstract
Brucella abortus is the etiological agent of bovine brucellosis, a zoonotic disease that causes significant economic losses worldwide. The differential proteomic profile of bovine chorioallantoic membrane (CAM) explants at early stages of infection with B. abortus (0.5, 2, 4, and 8 h) was determined. Analysis of CAM explants at 0.5 and 4 h showed the highest differences between uninfected and infected CAM explants, and therefore were used for the Differential Gel Electrophoresis (DIGE). A total of 103 spots were present in only one experimental group and were selected for identification by mass spectrometry (MALDI/ToF-ToF). Proteins only identified in extracts of CAM explants infected with B. abortus were related to recognition of PAMPs by TLR, production of reactive oxygen species, intracellular trafficking, and inflammation.
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Affiliation(s)
- Juliana P. S. Mol
- Universidade Federal de Minas Gerais, Escola de Veterinária, Departamento de Medicina Veterinária Preventiva, Belo Horizonte, Minas Gerais, Brazil
| | - Simone F. Pires
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Parasitologia, Belo Horizonte, Minas Gerais, Brazil
| | - Alexander D. Chapeaurouge
- Fundação Oswaldo Cruz, Instituto Oswaldo Cruz, Laboratório de Toxinologia, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Jonas Perales
- Fundação Oswaldo Cruz, Instituto Oswaldo Cruz, Laboratório de Toxinologia, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Renato L. Santos
- Universidade Federal de Minas Gerais, Escola de Veterinária, Departamento de Clínica e Cirurgia Veterinárias, Minas Gerais, Brasil
| | - Hélida M. Andrade
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Parasitologia, Belo Horizonte, Minas Gerais, Brazil
| | - Andrey P. Lage
- Universidade Federal de Minas Gerais, Escola de Veterinária, Departamento de Medicina Veterinária Preventiva, Belo Horizonte, Minas Gerais, Brazil
- * E-mail:
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Santos RL, Lima JT, Rouver WN, Moysés MR. Deficiency of sex hormones does not affect 17-ß-estradiol-induced coronary vasodilation in the isolated rat heart. ACTA ACUST UNITED AC 2016; 49:e5058. [PMID: 27074167 PMCID: PMC4833220 DOI: 10.1590/1414-431x20165058] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [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: 09/29/2015] [Accepted: 02/04/2016] [Indexed: 11/22/2022]
Abstract
The relaxation of coronary arteries by estrogens in the coronary vascular beds of
naive and hypertensive rats has been well described. However, little is known about
this action in gonadectomized rats. We investigated the effect of 17-ß-estradiol (E2)
in coronary arteries from gonadectomized rats, as well as the contributions of
endothelium-derived factors and potassium channels. Eight-week-old female and male
Wistar rats weighing 220-300 g were divided into sham-operated and gonadectomized
groups (n=9−12 animals per group). The baseline coronary perfusion pressure (CPP) was
determined, and the vasoactive effects of 10 μM E2 were assessed by bolus
administration before and after endothelium denudation or by perfusion with
NG-nitro-L-arginine methyl ester (L-NAME), indomethacin, clotrimazole,
L-NAME plus indomethacin, L-NAME plus clotrimazole or tetraethylammonium (TEA). The
CPP differed significantly between the female and sham-operated male animals.
Gonadectomy reduced the CPP only in female rats. Differences in E2-induced relaxation
were observed between the female and male animals, but male castration did not alter
this response. For both sexes, the relaxation response to E2 was, at least partly,
endothelium-dependent. The response to E2 was reduced only in the sham-operated
female rats treated with L-NAME. However, in the presence of indomethacin,
clotrimazole, L-NAME plus indomethacin or L-NAME plus clotrimazole, or TEA, the E2
response was significantly reduced in all groups. These results highlight the
importance of prostacyclin, endothelium-derived hyperpolarizing factor, and potassium
channels in the relaxation response of coronary arteries to E2 in all groups, whereas
nitric oxide may have had an important role only in the sham-operated female
group.
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Affiliation(s)
- R L Santos
- Departamento de Ciências Fisiológicas Centro de Ciências da Saúde, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - J T Lima
- Departamento de Ciências Fisiológicas Centro de Ciências da Saúde, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - W N Rouver
- Departamento de Ciências Fisiológicas Centro de Ciências da Saúde, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - M R Moysés
- Departamento de Ciências Fisiológicas Centro de Ciências da Saúde, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
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Silveira EL, Viott ADM, Santos RL, Macêdo AA, Aranha JMR, Menezes MS. First report of ovarian epidermoid cyst in a teleost. J Fish Dis 2016; 39:385-388. [PMID: 25728218 DOI: 10.1111/jfd.12355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Revised: 01/09/2015] [Accepted: 01/10/2015] [Indexed: 06/04/2023]
Affiliation(s)
- E L Silveira
- Departamento de Biologia Geral, Universidade Estadual de Ponta Grossa, Ponta Grossa, PR, Brazil
| | - A de M Viott
- Laboratório de Patologia Veterinária, Universidade Federal do Paraná, Palotina, PR, Brazil
| | - R L Santos
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - A A Macêdo
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - J M R Aranha
- Laboratório de Ecologia de Ambientes Aquáticos, Universidade Federal do Paraná, Palotina, PR, Brazil
| | - M S Menezes
- Laboratório de Ecologia de Ambientes Aquáticos, Universidade Federal do Paraná, Palotina, PR, Brazil
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Vieira BR, Firmino BO, Medeiros MID, Santos RL, Guênes GMT, Carvalho FG. In vitro Effect of Erosive Challenge on Surface Microhardness of Orthodontic Composites. Pesqui bras odontopediatria clín integr 2016. [DOI: 10.4034/pboci.2016.161.05] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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39
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Amaral PG, Santos RL, Salazar-Silva JR, Batista AUD, Bonan PRF. Prevalence of Dentinal Defects after Root Canal Preparations in Molars with Reciproc and WaveOne Systems. Pesqui bras odontopediatria clín integr 2016. [DOI: 10.4034/pboci.2016.161.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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40
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Macedo AA, Silva APC, Mol JPS, Costa LF, Garcia LNN, Araújo MS, Martins Filho OA, Paixão TA, Santos RL. The abcEDCBA-Encoded ABC Transporter and the virB Operon-Encoded Type IV Secretion System of Brucella ovis Are Critical for Intracellular Trafficking and Survival in Ovine Monocyte-Derived Macrophages. PLoS One 2015; 10:e0138131. [PMID: 26366863 PMCID: PMC4569489 DOI: 10.1371/journal.pone.0138131] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [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: 06/23/2015] [Accepted: 08/25/2015] [Indexed: 12/24/2022] Open
Abstract
Brucella ovis infection is associated with epididymitis, orchitis and infertility in rams. Most of the information available on B. ovis and host cell interaction has been generated using murine macrophages or epithelial cell lines, but the interaction between B. ovis and primary ovine macrophages has not been studied. The aim of this study was to evaluate the role of the B. ovis abcEDCBA-encoded ABC transporter and the virB operon-encoded Type IV Secretion System (T4SS) during intracellular survival of B. ovis in ovine peripheral blood monocyte-derived macrophages. ΔabcBA and ΔvirB2 mutant strains were unable to survive in the intracellular environment when compared to the WT B. ovis at 48 hours post infection (hpi). In addition, these mutant strains cannot exclude the lysosomal marker LAMP1 from its vacuolar membrane, and their vacuoles do not acquire the endoplasmic reticulum marker calreticulin, which takes place in the WT B. ovis containing vacuole. Higher levels of nitric oxide production were observed in macrophages infected with WT B. ovis at 48 hpi when compared to macrophages infected with the ΔabcBA or ΔvirB2 mutant strains. Conversely, higher levels of reactive oxygen species were detected in macrophages infected with the ΔabcBA or ΔvirB2 mutant strains at 48 hpi when compared to macrophages infected with the WT strain. Our results demonstrate that B. ovis is able to persist and multiply in ovine macrophages, while ΔabcBA and ΔvirB2 mutations prevent intracellular multiplication, favor phagolysosome fusion, and impair maturation of the B. ovis vacuole towards an endoplasmic reticulum-derived compartment.
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Affiliation(s)
- Auricelio A. Macedo
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Ana P. C. Silva
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Juliana P. S. Mol
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Luciana F. Costa
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Luize N. N. Garcia
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Marcio S. Araújo
- Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, MG, Brazil
| | | | - Tatiane A. Paixão
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Renato L. Santos
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
- * E-mail:
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Mol JPS, Soave SA, Turchetti AP, Pinheiro GRG, Pessanha AT, Malta MCC, Tinoco HP, Figueiredo LA, Gontijo NF, Paixão TA, Fujiwara RT, Santos RL. Transmissibility of Leishmania infantum from maned wolves (Chrysocyon brachyurus) and bush dogs (Speothos venaticus) to Lutzomyia longipalpis. Vet Parasitol 2015; 212:86-91. [PMID: 26342623 DOI: 10.1016/j.vetpar.2015.08.024] [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] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2015] [Revised: 08/20/2015] [Accepted: 08/22/2015] [Indexed: 11/16/2022]
Abstract
Leishmania (Leishmania) infantum is the cause of visceral leishmaniasis in the Americas. The disease is transmitted mostly through the bite of the invertebrate vector, the phlebotomine Lutzomyia longipalpis in the New World. Although the domestic dog is considered the most important reservoir of the disease, other mammalian, including wildlife, are susceptible to infection. The goal of this study was to perform xenodiagnosis to evaluate the capacity of naturally infected maned wolves (Chrysocyon brachyurus) and bush dogs (Speothos venaticus) to transmit Leishmania infantum to female sand flies (L. longipalpis). Xenodiagnoses were performed in February and August, 2013, when 77.7% (three maned wolves and four bush dogs) or 100% of the animals were positive, respectively. However, parasite loads in the engorged sand flies was low (<200 promastigotes and <150.2 parasites/μg of DNA). No statistically significant differences were observed between the two species or the two time points (February and August). In conclusion, this study demonstrated that maned wolves (C. brachyurus) and bush dogs (S. venaticus) asymptomatically infected with L. infantum are capable of transmitting L. infantum to the invertebrate host L. longipalpis, although the parasite loads in engorged phlebotomines exposed to these animals were very low.
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Affiliation(s)
- Juliana P S Mol
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Semíramis A Soave
- Departamento de Jardim Zoológico da Fundação Zoo-Botânica de Belo Horizonte, Belo Horizonte, MG, Brazil
| | - Andréia P Turchetti
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Guilherme R G Pinheiro
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Angela T Pessanha
- Departamento de Jardim Zoológico da Fundação Zoo-Botânica de Belo Horizonte, Belo Horizonte, MG, Brazil
| | - Marcelo C C Malta
- Departamento de Jardim Zoológico da Fundação Zoo-Botânica de Belo Horizonte, Belo Horizonte, MG, Brazil
| | - Herlandes P Tinoco
- Departamento de Jardim Zoológico da Fundação Zoo-Botânica de Belo Horizonte, Belo Horizonte, MG, Brazil
| | - Luiza A Figueiredo
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Nelder F Gontijo
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Tatiane A Paixão
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Ricardo T Fujiwara
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Renato L Santos
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
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Freitas AA, Santos RL, Colaço R, Bayão Horta R, Canongia Lopes JN. From lime to silica and alumina: systematic modeling of cement clinkers using a general force-field. Phys Chem Chem Phys 2015; 17:18477-94. [PMID: 26109081 DOI: 10.1039/c5cp02823j] [Citation(s) in RCA: 7] [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] [Indexed: 11/21/2022]
Abstract
Thirteen different cement-clinker crystalline phases present in the lime-silica-alumina system have been systematically modeled using a simple and general force field. This constitutes a new type of approach towards the study of lime-silica-alumina systems, where the simpler and more transferable Lennard-Jones potential was used instead of the more traditional Buckingham potential. The results were validated using experimental density and structural data. The elastic properties were also considered. Six amorphous phases (corresponding to calcium/silicon ratios corresponding to belite, rankinite, wollastonite and alumina-doped amorphous wollastonite with 5%, 10% and 15% alumina content) were also studied using molecular dynamics simulations. The obtained MD trajectories were used to characterize the different crystalline and amorphous phases in terms of the corresponding radial distribution functions, aggregate analyses and connectivity among silica groups. These studies allowed a direct comparison between the crystalline and amorphous phases and revealed how the structure of the silica network was modified in the amorphous materials or by the inclusion of other structural units such as alumina. The knowledge at an atomistic level of such modifications is paramount for the formulation of new cement-clinker phases.
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Affiliation(s)
- A A Freitas
- CIMPOR - Cimentos de Portugal, SGPS S.A., Rua Alexandre Herculano, 35, 1250-009 Lisboa, Portugal
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Nóbrega DRM, Santos RL, Soares RSC, Alves PM, Medeiros ACD, Pereira JV. A Randomized, Controlled Clinical Trial on the Clinical and Microbiological Efficacy of Punica granatum Linn Mouthwash. Pesqui bras odontopediatria clín integr 2015. [DOI: 10.4034/pboci.2015.151.32] [Citation(s) in RCA: 5] [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] [Indexed: 11/15/2022] Open
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Silva TMA, Mol JPS, Winter MG, Atluri V, Xavier MN, Pires SF, Paixão TA, Andrade HM, Santos RL, Tsolis RM. The predicted ABC transporter AbcEDCBA is required for type IV secretion system expression and lysosomal evasion by Brucella ovis. PLoS One 2014; 9:e114532. [PMID: 25474545 PMCID: PMC4256435 DOI: 10.1371/journal.pone.0114532] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [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: 06/24/2014] [Accepted: 11/10/2014] [Indexed: 12/23/2022] Open
Abstract
Brucella ovis is a major cause of reproductive failure in rams and it is one of the few well-described Brucella species that is not zoonotic. Previous work showed that a B. ovis mutant lacking a species-specific ABC transporter (ΔabcBA) was attenuated in mice and was unable to survive in macrophages. The aim of this study was to evaluate the role of this ABC transporter during intracellular survival of B. ovis. In HeLa cells, B. ovis WT was able to survive and replicate at later time point (48 hpi), whereas an ΔabcBA mutant was attenuated at 24 hpi. The reduced survival of the ΔabcBA mutant was associated with a decreased ability to exclude the lysosomal marker LAMP1 from its vacuolar membrane, suggesting a failure to establish a replicative niche. The ΔabcBA mutant showed a reduced abundance of the Type IV secretion system (T4SS) proteins VirB8 and VirB11 in both rich and acid media, when compared to WT B. ovis. However, mRNA levels of virB1, virB8, hutC, and vjbR were similar in both strains. These results support the notion that the ABC transporter encoded by abcEDCBA or its transported substrate acts at a post-transcriptional level to promote the optimal expression of the B. ovis T4SS within infected host cells.
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Affiliation(s)
- Teane M. A. Silva
- Departamento de Clínica e Cirurgia Veterinária, Escola de Veterinária da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Juliana P. S. Mol
- Departamento de Clínica e Cirurgia Veterinária, Escola de Veterinária da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Maria G. Winter
- Department of Medical Microbiology and Immunology, University of California Davis, Davis, California, United States of America
| | - Vidya Atluri
- Department of Medical Microbiology and Immunology, University of California Davis, Davis, California, United States of America
| | - Mariana N. Xavier
- Department of Medical Microbiology and Immunology, University of California Davis, Davis, California, United States of America
| | - Simone F. Pires
- Departamento de Parasitologia, Instituto de Ciências Biológicas da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Tatiane A. Paixão
- Departamento de Patologia Geral, Instituto de Ciências Biológicas da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Hélida M. Andrade
- Departamento de Parasitologia, Instituto de Ciências Biológicas da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Renato L. Santos
- Departamento de Clínica e Cirurgia Veterinária, Escola de Veterinária da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- * E-mail: (RLS); (RMT)
| | - Renee M. Tsolis
- Department of Medical Microbiology and Immunology, University of California Davis, Davis, California, United States of America
- * E-mail: (RLS); (RMT)
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Andrade VA, Almeida AC, Souza DS, Colen KG, Macêdo AA, Martins ER, Fonseca FS, Santos RL. Antimicrobial activity and acute and chronic toxicity of the essential oil of Lippia origanoides. Pesq Vet Bras 2014. [DOI: 10.1590/s0100-736x2014001200002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Currently, there is a growing interest in medicinal plants, because of an increased demand for alternate therapies. In this study, the antimicrobial activity and toxicity of the essential oil of Lippia origanoides (L. origanoides) were investigated. The essential oil of L. origanoides was extracted by steam-dragging distillation and its constituents were identified by chromatography coupled with mass spectrometry. Among the 15 compounds identified, the most abundant were carvacrol (29.00%), o-cymene (25.57%), and thymol methyl ether (11.50%). The essential oil was studied in antimicrobial assays to determine the MIC and MBC. The results indicated that a concentration of 120μL/mL of oil was sufficient to inhibit the growth of the following microorganisms: Escherichia coli (ATCC 25922), Staphylococcus aureus (ATCC 25923) and Salmonella cholerasuis (ATCC 10708). Acute and chronic toxic effects of orally administered oil were investigated in Wistar rats by using standard methods. Doses of 30, 60 and 120mg/kg of the essential oil did not induce significant changes in weight, behavior or hematological and biochemical parameters in the animals. There were no signs of any histopathological changes to the liver, kidneys or heart of the treated rats, suggesting that Lippia origanoides oil is non-toxic after oral administration in acute or chronic toxicity studies. The results obtained in this study show that the essential oil of L. origanoides has a high safety margin, with no detectable toxic effects in rats treated with doses to 120mg/kg. In addition, L. origanoides oil demonstrated potent antimicrobial activity against S. aureus, E. coli and S. cholerasuis. Based on these findings, this essential oil may have practical application as a veterinary antimicrobial.
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Lombardi MC, Turchetti AP, Tinoco HP, Pessanha AT, Soave SA, Malta MC, Paixão TA, Santos RL. Diagnosis of Leishmania infantum infection by Polymerase Chain Reaction in wild mammals. Pesq Vet Bras 2014. [DOI: 10.1590/s0100-736x2014001200017] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Visceral leishmaniasis is a chronic infectious disease caused by Leishmania infantum (synonym: Leishmania chagasi) and transmitted by the sandfly Lutzomyia longipalpis in Brazil. It is an endemic zoonosis in several regions of the country, including Belo Horizonte (State of Minas Gerais). In urban areas, the domestic dog is susceptible and considered the most important animal reservoir. However, L. infantum has been previously diagnosed in other species, including captive primates and canids. This study aimed to evaluate the presence of the agent DNA in captive animals as well as some free ranging animals from the Zoo-Botanical Foundation of Belo Horizonte by Polymerase Chain Reaction. Eighty one blood samples from primates, carnivores, ruminants, edentates, marsupial, and a monogastric herbivore were analyzed. Three primates Alouatta guariba (brown howler monkey), and two canids Speothos venaticus (bush dog) were positive, demonstrating the importance of leishmaniasis control in endemic areas for preservation of wildlife species in captivity.
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Mol JPS, Costa EA, Carvalho AF, Sun YH, Tsolis RM, Paixão TA, Santos RL. Early transcriptional responses of bovine chorioallantoic membrane explants to wild type, ΔvirB2 or ΔbtpB Brucella abortus infection. PLoS One 2014; 9:e108606. [PMID: 25259715 PMCID: PMC4178178 DOI: 10.1371/journal.pone.0108606] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Accepted: 08/29/2014] [Indexed: 12/23/2022] Open
Abstract
The pathogenesis of the Brucella-induced inflammatory response in the bovine placenta is not completely understood. In this study we evaluated the role of the B. abortus Type IV secretion system and the anti-inflammatory factor BtpB in early interactions with bovine placental tissues. Transcription profiles of chorioallantoic membrane (CAM) explants inoculated with wild type (strain 2308), ΔvirB2 or ΔbtpB Brucella abortus were compared by microarray analysis at 4 hours post infection. Transcripts with significant variation (>2 fold change; P<0.05) were functionally classified, and transcripts related to defense and inflammation were assessed by quantitative real time RT-PCR. Infection with wild type B. abortus resulted in slightly more genes with decreased than increased transcription levels. Conversely, infection of trophoblastic cells with the ΔvirB2 or the ΔbtpB mutant strains, that lack a functional T4SS or that has impaired inhibition of TLR signaling, respectively, induced more upregulated than downregulated genes. Wild type Brucella abortus impaired transcription of host genes related to immune response when compared to ΔvirB and ΔbtpB mutants. Our findings suggest that proinflammatory genes are negatively modulated in bovine trophoblastic cells at early stages of infection. The virB operon and btpB are directly or indirectly related to modulation of these host genes. These results shed light on the early interactions between B. abortus and placental tissue that ultimately culminate in inflammatory pathology and abortion.
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Affiliation(s)
- Juliana P. S. Mol
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Erica A. Costa
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Alex F. Carvalho
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Yao-Hui Sun
- Department of Medical Microbiology and Immunology, School of Medicine, University of California Davis, Davis, California, United States of America
| | - Reneé M. Tsolis
- Department of Medical Microbiology and Immunology, School of Medicine, University of California Davis, Davis, California, United States of America
| | - Tatiane A. Paixão
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Renato L. Santos
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
- * E-mail:
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Turchetti AP, Souza TD, Paixão TA, Santos RL. Sexual and vertical transmission of visceral leishmaniasis. J Infect Dev Ctries 2014; 8:403-7. [PMID: 24727504 DOI: 10.3855/jidc.4108] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Revised: 09/28/2013] [Accepted: 09/30/2013] [Indexed: 10/31/2022] Open
Abstract
Visceral leishmaniasis (VL) is an important zoonosis caused by Leishmania infantum, which has in the domestic dog its principal vertebrate host. VL is usually transmitted by phlebotomine sand flies, however atypical routes of transmission have been described. In this review we discuss the the role of sexual and vertical transmissions, and their role in the maintenance of VL in canine populations.
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Affiliation(s)
- Andreia P Turchetti
- Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
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Macedo AA, Bittar JFF, Bassi PB, Ronda JB, Bittar ER, Panetto JCC, Araujo MSS, Santos RL, Martins-Filho OA. Influence of endogamy and mitochondrial DNA on immunological parameters in cattle. BMC Vet Res 2014; 10:79. [PMID: 24694022 PMCID: PMC4230805 DOI: 10.1186/1746-6148-10-79] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [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: 07/18/2013] [Accepted: 03/18/2014] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Endogamy increases the risk of manifestation of deleterious recessive genes. Mitochondrial DNA allows the separation of American Zebu (Bos indicus and Bos taurus) and evaluate the effect of mitochondrial DNA on productive traits of cattle. However, the effect of endogamy and mitochondrial DNA (mtDNA) on the immune system remains unclear. The aim of this study was to evaluate the association between endogamy, mtDNA and immune parameters. RESULTS A total of 86 cattle (43 cows and 43 calves) were used in this study. Age, endogamy, milk yield, and origin of mtDNA were measured and their influence on immunological parameters was evaluated. Older cows had increased CD4+ T cells, decreased CD21+ and γδhigh T cells as well as increased CD4+/CD8+ and T/B ratio. Multiple regression analysis indicated that endogamy in calves was associated with increased CD8+ T and CD21+ B lymphocytes, and decreased γδhigh T cells in peripheral blood. Cows with medium and lower endogamy had a lower percentage of B lymphocytes and γδlow T cells and cows with lower endogamy had higher levels of γδ T cells and γδhigh T cells, as well as the CD4+/CD48+ cell ratio. Calves with higher endogamy had higher levels of CD8+ T lymphocytes, whereas calves with lower endogamy had lower levels of γδlow T cells. CONCLUSIONS These results demonstrated for the first time that endogamy influences the immune system of cattle.
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Affiliation(s)
- Auricélio A Macedo
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Joely F F Bittar
- Universidade de Uberaba, Uberaba, Minas Gerais, Brazil
- Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Laboratório de Biomarcadores de Diagnóstico e Monitoração, Belo Horizonte 1715, 30190-002, Brazil
| | - Paula B Bassi
- Universidade de Uberaba, Uberaba, Minas Gerais, Brazil
| | | | | | | | - Márcio S S Araujo
- Universidade de Uberaba, Uberaba, Minas Gerais, Brazil
- Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Laboratório de Biomarcadores de Diagnóstico e Monitoração, Belo Horizonte 1715, 30190-002, Brazil
| | - Renato L Santos
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Olindo A Martins-Filho
- Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Laboratório de Biomarcadores de Diagnóstico e Monitoração, Belo Horizonte 1715, 30190-002, Brazil
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Paixão TA, Malta MCC, Soave SA, Tinoco HP, Costa ME, Pessanha AT, Silva RO, Coura FM, Costa LF, Turchetti AP, Lobato FC, Melo MM, Heinemann MB, Santos RL. Hemorrhagic colitis associated with Salmonella enterica
serotype Infantis infection in a captive western lowland gorilla (Gorilla gorilla gorilla
) in Brazil. J Med Primatol 2013; 43:118-21. [DOI: 10.1111/jmp.12094] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/25/2013] [Indexed: 11/30/2022]
Affiliation(s)
- Tatiane A. Paixão
- Instituto de Ciências Biológicas; Universidade Federal de Minas Gerais; Belo Horizonte Brazil
| | - Marcelo C. C. Malta
- Departamento de Jardim Zoológico da; Fundação Zoo-Botânica de Belo Horizonte; Belo Horizonte Brazil
| | - Semíramis A. Soave
- Departamento de Jardim Zoológico da; Fundação Zoo-Botânica de Belo Horizonte; Belo Horizonte Brazil
| | - Herlandes P. Tinoco
- Departamento de Jardim Zoológico da; Fundação Zoo-Botânica de Belo Horizonte; Belo Horizonte Brazil
| | - Maria E.L.T. Costa
- Departamento de Jardim Zoológico da; Fundação Zoo-Botânica de Belo Horizonte; Belo Horizonte Brazil
| | - Angela T. Pessanha
- Departamento de Jardim Zoológico da; Fundação Zoo-Botânica de Belo Horizonte; Belo Horizonte Brazil
| | - Rodrigo O.S. Silva
- Escola de Veterinária; Universidade Federal de Minas Gerais; Belo Horizonte Brazil
| | - Fernanda M. Coura
- Escola de Veterinária; Universidade Federal de Minas Gerais; Belo Horizonte Brazil
| | - Luciana F. Costa
- Escola de Veterinária; Universidade Federal de Minas Gerais; Belo Horizonte Brazil
| | - Andreia P. Turchetti
- Escola de Veterinária; Universidade Federal de Minas Gerais; Belo Horizonte Brazil
| | | | - Marilia M. Melo
- Escola de Veterinária; Universidade Federal de Minas Gerais; Belo Horizonte Brazil
| | - Marcos B. Heinemann
- Escola de Veterinária; Universidade Federal de Minas Gerais; Belo Horizonte Brazil
| | - Renato L. Santos
- Escola de Veterinária; Universidade Federal de Minas Gerais; Belo Horizonte Brazil
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