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da Silva CV, Velikkakam T, de Oliveira ECM, Silveira ACA, de Lima Júnior JP, Uombe NPI, da Silva PHR, Borges BC. Cellular dormancy: A widespread phenomenon that perpetuates infectious diseases. J Basic Microbiol 2024; 64:e2300389. [PMID: 38064123 DOI: 10.1002/jobm.202300389] [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: 07/11/2023] [Revised: 11/05/2023] [Accepted: 11/21/2023] [Indexed: 05/03/2024]
Abstract
Under adverse environmental conditions, microorganisms are able to enter a state of cellular dormancy which consists of cell cycle arrest and interruption of multiplication. This process ensures their perpetuation in the infected host organism and enables the spread of disease. Throughout biological evolution, dormancy allowed microorganisms to persist in a harsh niche until favorable conditions for their reactivation were re-established. Here, we propose to discuss the dormancy of bacteria and protozoa pathogens focusing on the potential mechanisms and components associated with dormancy.
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Affiliation(s)
- Claudio V da Silva
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, Brazil
| | - Teresiama Velikkakam
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, Brazil
| | - Elida C M de Oliveira
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, Brazil
| | - Anna C A Silveira
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, Brazil
| | - Joed P de Lima Júnior
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, Brazil
| | - Nelsa P I Uombe
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, Brazil
| | - Paulo H R da Silva
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, Brazil
| | - Bruna C Borges
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, Brazil
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2
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Oliveira RM, Teixeira TL, Rodrigues CC, da Silva AA, Borges BC, Brígido RTS, Teixeira SC, Dos Santos MA, Servato JPS, Santos DDO, Silva MJB, Goulart LR, Silva CV. Galectin-3 plays a protective role in Leishmania (Leishmania) amazonensis infection. Glycobiology 2021; 31:1378-1389. [PMID: 34192330 DOI: 10.1093/glycob/cwab062] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 05/24/2021] [Accepted: 06/20/2021] [Indexed: 11/13/2022] Open
Abstract
Leishmania (L.) amazonensis is one of the species responsible for the development of cutaneous leishmaniasis in South America. After entering the vertebrate host, L. (L.) amazonensis invades mainly neutrophils, macrophages, and dendritic cells. Studies have shown that gal-3 acts as a pattern recognition receptor. However, the role of this protein in the context of L. (L.) amazonensis infection remains unclear. Here, we investigated the impact of gal-3 expression on experimental infection by L. (L.) amazonensis. Our data showed that gal-3 plays a role in controlling parasite invasion, replication and the formation of endocytic vesicles. Moreover, mice with gal-3 deficiency showed an exacerbated inflammatory response. Taken together, our data shed light to a critical role of gal-3 in the host response to infection by L. (L.) amazonensis.
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Affiliation(s)
- Rafael M Oliveira
- Laboratório de Tripanosomatídeos, Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia 38400-902, Brazil
| | - Thaise L Teixeira
- Laboratório de Tripanosomatídeos, Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia 38400-902, Brazil.,Departamento de Microbiologia, Imunologia e Parasitologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo 04023-062, Brazil
| | - Cassiano C Rodrigues
- Laboratório de Tripanosomatídeos, Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia 38400-902, Brazil
| | - Aline A da Silva
- Laboratório de Tripanosomatídeos, Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia 38400-902, Brazil
| | - Bruna C Borges
- Laboratório de Tripanosomatídeos, Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia 38400-902, Brazil.,Laboratório de Biomarcadores Tumorais e Osteoimunologia, Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia 38400-902, Brazil
| | - Rebecca T S Brígido
- Laboratório de Tripanosomatídeos, Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia 38400-902, Brazil
| | - Samuel C Teixeira
- Laboratório de Tripanosomatídeos, Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia 38400-902, Brazil
| | - Marlus A Dos Santos
- Laboratório de Tripanosomatídeos, Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia 38400-902, Brazil
| | | | - Débora de O Santos
- Laboratório de Patologia Bucal, Faculdade de Odontologia, Universidade Federal de Uberlândia, Uberlândia 38405-320, Brazil
| | - Marcelo J B Silva
- Laboratório de Biomarcadores Tumorais e Osteoimunologia, Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia 38400-902, Brazil
| | - Luiz R Goulart
- Laboratório de Nanobiotecnologia, Universidade Federal de Uberlândia, Uberlândia 38400-902, Brazil
| | - Claudio V Silva
- Laboratório de Tripanosomatídeos, Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia 38400-902, Brazil
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3
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Teixeira SC, Borges BC, Oliveira VQ, Carregosa LS, Bastos LA, Santos IA, Jardim ACG, Melo FF, Freitas LM, Rodrigues VM, Lopes DS. Insights into the antiviral activity of phospholipases A 2 (PLA 2s) from snake venoms. Int J Biol Macromol 2020; 164:616-625. [PMID: 32698062 PMCID: PMC7368918 DOI: 10.1016/j.ijbiomac.2020.07.178] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 07/08/2020] [Accepted: 07/14/2020] [Indexed: 12/18/2022]
Abstract
Viruses are associated with several human diseases that infect a large number of individuals, hence directly affecting global health and economy. Owing to the lack of efficient vaccines, antiviral therapy and emerging resistance strains, many viruses are considered as a potential threat to public health. Therefore, researches have been developed to identify new drug candidates for future treatments. Among them, antiviral research based on natural molecules is a promising approach. Phospholipases A2 (PLA2s) isolated from snake venom have shown significant antiviral activity against some viruses such as Dengue virus, Human Immunodeficiency virus, Hepatitis C virus and Yellow fever virus, and have emerged as an attractive alternative strategy for the development of novel antiviral therapy. Thus, this review provides an overview of remarkable findings involving PLA2s from snake venom that possess antiviral activity, and discusses the mechanisms of action mediated by PLA2s against different stages of virus replication cycle. Additionally, molecular docking simulations were performed by interacting between phospholipids from Dengue virus envelope and PLA2s from Bothrops asper snake venom. Studies on snake venom PLA2s highlight the potential use of these proteins for the development of broad-spectrum antiviral drugs.
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Affiliation(s)
- S C Teixeira
- Department of Immunology, Institute of Biomedical Science, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - B C Borges
- Department of Immunology, Institute of Biomedical Science, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - V Q Oliveira
- Multidisciplinary Institute of Health, Anísio Teixeira Campus, Federal University of Bahia, Vitória da Conquista, BA, Brazil
| | - L S Carregosa
- Multidisciplinary Institute of Health, Anísio Teixeira Campus, Federal University of Bahia, Vitória da Conquista, BA, Brazil
| | - L A Bastos
- Multidisciplinary Institute of Health, Anísio Teixeira Campus, Federal University of Bahia, Vitória da Conquista, BA, Brazil
| | - I A Santos
- Laboratory of Virology, Institute of Biomedical Science, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - A C G Jardim
- Laboratory of Virology, Institute of Biomedical Science, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - F F Melo
- Multidisciplinary Institute of Health, Anísio Teixeira Campus, Federal University of Bahia, Vitória da Conquista, BA, Brazil
| | - L M Freitas
- Multidisciplinary Institute of Health, Anísio Teixeira Campus, Federal University of Bahia, Vitória da Conquista, BA, Brazil
| | - V M Rodrigues
- Laboratory of Biochemistry and Animal Toxins, Institute of Biotechnology, Federal University of Uberlândia, Uberlândia, MG, Brazil.
| | - D S Lopes
- Multidisciplinary Institute of Health, Anísio Teixeira Campus, Federal University of Bahia, Vitória da Conquista, BA, Brazil; Institute of Health Sciences, Department of Bio-Function, Federal University of Bahia, Salvador, BA, Brazil.
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4
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Teixeira TL, Castilhos P, Rodrigues CC, da Silva AA, Brígido RT, Teixeira SC, Borges BC, Dos Santos MA, Martins FA, Santos PCF, Servato JPS, Silva MS, da Silva MJB, Elias MC, da Silva CV. Experimental evidences that P21 protein controls Trypanosoma cruzi replication and modulates the pathogenesis of infection. Microb Pathog 2019; 135:103618. [PMID: 31310832 DOI: 10.1016/j.micpath.2019.103618] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 05/06/2019] [Revised: 07/04/2019] [Accepted: 07/06/2019] [Indexed: 10/26/2022]
Abstract
P21 is a protein secreted by Trypanosoma cruzi (T. cruzi). Previous studies have shown a spectrum of biological activities performed by P21 such as induction of phagocytosis, leukocyte chemotaxis and inhibition of angiogenesis. However, the activity of P21 in T. cruzi infection remains unknown. Here, we reported the role of P21 in mice harboring late T. cruzi infection. Treatment with recombinant P21 protein (rP21) reduced parasite load and angiogenesis, and induced fibrosis in the cardiac tissue of infected mice. In addition, rP21 reduced the growth of epimastigotes, inhibited intracellular replication of amastigotes and modulated the parasite cell cycle. Our data suggest that P21 controls parasite replication in the host, supporting the survival of both parasite and host.
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Affiliation(s)
- Thaise L Teixeira
- Laboratório de Tripanosomatídeos, Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Rua Piauí, Bloco 2B Sala 200 Campus Umuarama, 38400-902, Uberlândia, MG, Brazil
| | - Patrícia Castilhos
- Laboratório de Tripanosomatídeos, Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Rua Piauí, Bloco 2B Sala 200 Campus Umuarama, 38400-902, Uberlândia, MG, Brazil
| | - Cassiano C Rodrigues
- Laboratório de Tripanosomatídeos, Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Rua Piauí, Bloco 2B Sala 200 Campus Umuarama, 38400-902, Uberlândia, MG, Brazil
| | - Aline A da Silva
- Laboratório de Tripanosomatídeos, Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Rua Piauí, Bloco 2B Sala 200 Campus Umuarama, 38400-902, Uberlândia, MG, Brazil
| | - Rebecca Ts Brígido
- Laboratório de Tripanosomatídeos, Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Rua Piauí, Bloco 2B Sala 200 Campus Umuarama, 38400-902, Uberlândia, MG, Brazil
| | - Samuel C Teixeira
- Laboratório de Tripanosomatídeos, Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Rua Piauí, Bloco 2B Sala 200 Campus Umuarama, 38400-902, Uberlândia, MG, Brazil
| | - Bruna C Borges
- Laboratório de Tripanosomatídeos, Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Rua Piauí, Bloco 2B Sala 200 Campus Umuarama, 38400-902, Uberlândia, MG, Brazil
| | - Marlus A Dos Santos
- Laboratório de Tripanosomatídeos, Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Rua Piauí, Bloco 2B Sala 200 Campus Umuarama, 38400-902, Uberlândia, MG, Brazil
| | - Flávia A Martins
- Laboratório de Tripanosomatídeos, Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Rua Piauí, Bloco 2B Sala 200 Campus Umuarama, 38400-902, Uberlândia, MG, Brazil
| | - Paulo César F Santos
- Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de São Paulo-Escola Paulista de Medicina, São Paulo - São Paulo, Brazil
| | | | - M S Silva
- Centro de Toxinas, Resposta Imune e Sinalização Celular, Instituto Butantan, São Paulo, São Paulo, Brazil
| | - M J B da Silva
- Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brazil
| | - M C Elias
- Centro de Toxinas, Resposta Imune e Sinalização Celular, Instituto Butantan, São Paulo, São Paulo, Brazil
| | - Claudio V da Silva
- Laboratório de Tripanosomatídeos, Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Rua Piauí, Bloco 2B Sala 200 Campus Umuarama, 38400-902, Uberlândia, MG, Brazil.
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5
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Borges BC, Uehara IA, Dias LOS, Brígido PC, da Silva CV, Silva MJB. Mechanisms of Infectivity and Evasion Derived from Microvesicles Cargo Produced by Trypanosoma cruzi. Front Cell Infect Microbiol 2016; 6:161. [PMID: 27921011 PMCID: PMC5118865 DOI: 10.3389/fcimb.2016.00161] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 11/07/2016] [Indexed: 11/13/2022] Open
Abstract
Cell invasion by the intracellular protozoans requires interaction of proteins from both the host and the parasite. Many parasites establish chronic infections, showing they have the potential to escape the immune system; for example, Trypanosoma cruzi is an intracellular parasite that causes Chagas disease. Parasite internalization into host cell requires secreted and surface molecules, such as microvesicles. The release of microvesicles and other vesicles, such as exosomes, by different eukaryotic organisms was first observed in the late twentieth century. The characterization and function of these vesicles have recently been the focus of several investigations. In this review, we discuss the release of microvesicles by T. cruzi. The molecular content of these vesicles is composed of several molecules that take place during parasite-host cell interaction and contribute to the parasite-driven mechanism of evasion from the host immune system. These new findings appear to have a profound impact on the comprehension of T. cruzi biology and highlight novel potential strategies for developing more efficient therapeutic approaches.
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Affiliation(s)
- Bruna C Borges
- Laboratório de Osteoimunologia e Imunologia dos Tumores, Instituto de Ciências Biomédicas, Universidade Federal de UberlândiaUberlândia, Brazil; Laboratório de Tripanossomatídeos, Instituto de Ciências Biomédicas, Universidade Federal de UberlândiaUberlândia, Brazil
| | - Isadora A Uehara
- Laboratório de Osteoimunologia e Imunologia dos Tumores, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia Uberlândia, Brazil
| | - Laysa O S Dias
- Laboratório de Osteoimunologia e Imunologia dos Tumores, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia Uberlândia, Brazil
| | - Paula C Brígido
- Laboratório de Tripanossomatídeos, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia Uberlândia, Brazil
| | - Claudio V da Silva
- Laboratório de Tripanossomatídeos, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia Uberlândia, Brazil
| | - Marcelo J B Silva
- Laboratório de Osteoimunologia e Imunologia dos Tumores, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia Uberlândia, Brazil
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Rodrigues AA, Notário AFO, Teixeira TL, e Silva RT, Quintal APN, Alves RN, Brígido PC, Siqueira CS, Martins FA, Machado FC, Clemente TM, da Silva AA, Borges BC, Teixeira SC, dos Santos MA, da Silva CV. A high throughput analysis of cytokines and chemokines expression during the course of Trypanosoma cruzi experimental oral infection. Acta Trop 2016; 157:42-53. [PMID: 26827742 DOI: 10.1016/j.actatropica.2016.01.025] [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] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2015] [Revised: 12/14/2015] [Accepted: 01/25/2016] [Indexed: 01/28/2023]
Abstract
Trypanosoma cruzi has high biological and biochemical diversity and variable tissue tropism. Here we aimed to verify the kinetics of cytokine and chemokine in situ secretion in animals infected with two distinct T. cruzi strains after oral inoculation. Also, we investigated parasite migration, residence and pathological damage in stomach, heart and spleen. Our results showed that host immune response against T. cruzi infection is an intricate phenomenon that depends on the parasite strain, on the infected organ and on the time point of the infection. We believe that a wide comprehension of host immune response will potentially provide basis for the development of immunotherapeutic strategies in order to clear parasitism and minimize tissue injury. In this context, we find that KC poses as a possible tool to be used.
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Affiliation(s)
- Adele A Rodrigues
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Ana Flávia O Notário
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Thaise L Teixeira
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Rebecca T e Silva
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Amanda P N Quintal
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Rosiane N Alves
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Paula C Brígido
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Carla S Siqueira
- Faculdade de Odontologia, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Flávia A Martins
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Fabrício C Machado
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil; Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de São Paulo, São Paulo, Brazil, Brazil
| | - Tatiana M Clemente
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil; Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de São Paulo, São Paulo, Brazil, Brazil
| | - Aline A da Silva
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Bruna C Borges
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Samuel C Teixeira
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Marlus A dos Santos
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Claudio V da Silva
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil.
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Quintal APN, Borges BC, Brígido PC, Silva RT, Notário AF, Santos MA, de Souza MA, Nascimento FGO, Mundim AV, Costa GMJ, Vasconcelos AB, da Silva CV. Revealing the kinetics of Leishmania chagasi infection in the male genital system of hamsters. Infect Dis Poverty 2016; 5:29. [PMID: 27025459 PMCID: PMC4812609 DOI: 10.1186/s40249-016-0122-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 03/23/2016] [Indexed: 11/10/2022] Open
Abstract
Background Leishmaniasis causes alterations and lesions in the genital system, which leads to azoospermia and testicular atrophy in animals during the chronic phase of the infection. The aim of this study was to reveal the kinetics of Leishmania chagasi infection in the genital system of male golden hamsters (Mesocricetus auratus). Methods Animals were intraperitoneally inoculated with amastigotes from L. chagasi. At different time points animals were euthanized and genital organs processed for histo-pathological, qPCR, cytokines and testosterone detection assays. Results Our results showed a high parasite load in testis, followed by an increase of pro-inflammatory cytokines IL1-β, TNF-α and IFN-γ, and testosterone. Subsequently, IL-4 expression was upregulated and basal parasite persistence in testis was observed using the experimental approach. Conclusion Extracellular amastigotes migrated to the epididymis posing as a potential major factor of parasite persistence and venereal transmission of L. chagasi infection in hamsters. Electronic supplementary material The online version of this article (doi:10.1186/s40249-016-0122-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Amanda P N Quintal
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brasil
| | - Bruna C Borges
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brasil
| | - Paula C Brígido
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brasil
| | - Rebecca T Silva
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brasil
| | - Ana F Notário
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brasil
| | - Marlus A Santos
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brasil
| | - Maria A de Souza
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brasil
| | | | - Antônio V Mundim
- Hospital Veterinário, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brasil
| | - Guilherme M J Costa
- Departamento de Ciências Biomédicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brasil
| | | | - Claudio V da Silva
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brasil. .,Departamento de Imunologia - Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Campus Umuarama, Uberlândia, MG, Brasil.
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8
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Vechiato FMV, Rivas PMS, Ruginsk SG, Borges BC, Elias LLK, Antunes-Rodrigues J. The type-1 cannabinoid receptor modulates the hydroelectrolytic balance independently of the energy homeostasis during salt load. Horm Behav 2016; 78:43-51. [PMID: 26497248 DOI: 10.1016/j.yhbeh.2015.10.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 09/18/2015] [Accepted: 10/20/2015] [Indexed: 01/20/2023]
Abstract
Hydroelectrolytic imbalances, such as saline load (SL), trigger behavioral and neuroendocrine responses, such as thirst, hypophagia, vasopressin (AVP) and oxytocin (OT) release and hypothalamus–pituitary–adrenal (HPA) axis activation. To investigate the participation of the type-1 cannabinoid receptor (CB1R) in these homeostatic mechanisms,male adult Wistar rats were subjected to SL (0.3MNaCl) for four days. SL induced not only increases in the water intake and plasma levels of AVP, OT and corticosterone, as previously described, but also increases in CB1R expression in the lamina terminalis, which integrates sensory afferents, aswell as in the hypothalamus, the main integrative and effector area controlling hydroelectrolytic homeostasis. A more detailed analysis revealed that CB1R-positive terminals are in close apposition with not only axons but also dendrites and secretory granules of magnocellular neurons, particularly vasopressinergic cells. In satiated and euhydrated animals, the intracerebroventricular administration of the CB1R selective agonist ACEA (0.1 μg/5 μL) promoted hyperphagia, but this treatment did not reverse the hyperosmolality-induced hypophagia in the SL group. Furthermore, ACEA pretreatment potentiated water intake in the SL animals during rehydration as well as enhanced the corticosterone release and prevented the increase in AVP and OT secretion induced by SL. The same parameters were not changed by ACEA in the animals whose daily food intake was matched to that of the SL group (Pair-Fed). These data indicate that CB1Rs modulate the hydroelectrolytic balance independently of the food intake during sustained hyperosmolality and hypovolemia.
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Affiliation(s)
- F M V Vechiato
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo 14049-900, Brazil
| | - P M S Rivas
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo 14049-900, Brazil
| | - S G Ruginsk
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo 14049-900, Brazil; Department of Physiological Sciences, Biomedical Sciences Institute, Federal University of Alfenas, Alfenas, Minas Gerais 37130-000, Brazil
| | - B C Borges
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo 14049-900, Brazil
| | - L L K Elias
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo 14049-900, Brazil
| | - J Antunes-Rodrigues
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo 14049-900, Brazil.
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Borges BC, Rorato R, Antunes-Rodrigues J, Elias LLK. Glial cell activity is maintained during prolonged inflammatory challenge in rats. Braz J Med Biol Res 2012; 45:784-91. [PMID: 22570086 PMCID: PMC3854243 DOI: 10.1590/s0100-879x2012007500069] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [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: 10/11/2011] [Accepted: 04/19/2012] [Indexed: 12/12/2022] Open
Abstract
We evaluated the expression of glial fibrillary acidic protein (GFAP), glutamine synthetase (GS), ionized calcium binding adaptor protein-1 (Iba-1), and ferritin in rats after single or repeated lipopolysaccharide (LPS) treatment, which is known to induce endotoxin tolerance and glial activation. Male Wistar rats (200-250 g) received ip injections of LPS (100 µg/kg) or saline for 6 days: 6 saline (N = 5), 5 saline + 1 LPS (N = 6) and 6 LPS (N = 6). After the sixth injection, the rats were perfused and the brains were collected for immunohistochemistry. After a single LPS dose, the number of GFAP-positive cells increased in the hypothalamic arcuate nucleus (ARC; 1 LPS: 35.6 ± 1.4 vs control: 23.1 ± 2.5) and hippocampus (1 LPS: 165.0 ± 3.0 vs control: 137.5 ± 2.5), and interestingly, 6 LPS injections further increased GFAP expression in these regions (ARC = 52.5 ± 4.3; hippocampus = 182.2 ± 4.1). We found a higher GS expression only in the hippocampus of the 6 LPS injections group (56.6 ± 0.8 vs 46.7 ± 1.9). Ferritin-positive cells increased similarly in the hippocampus of rats treated with a single (49.2 ± 1.7 vs 28.1 ± 1.9) or repeated (47.6 ± 1.1 vs 28.1 ± 1.9) LPS dose. Single LPS enhanced Iba-1 in the paraventricular nucleus (PVN: 92.8 ± 4.1 vs 65.2 ± 2.2) and hippocampus (99.4 ± 4.4 vs 73.8 ± 2.1), but had no effect in the retrochiasmatic nucleus (RCA) and ARC. Interestingly, 6 LPS increased the Iba-1 expression in these hypothalamic and hippocampal regions (RCA: 57.8 ± 4.6 vs 36.6 ± 2.2; ARC: 62.4 ± 6.0 vs 37.0 ± 2.2; PVN: 100.7 ± 4.4 vs 65.2 ± 2.2; hippocampus: 123.0 ± 3.8 vs 73.8 ± 2.1). The results suggest that repeated LPS treatment stimulates the expression of glial activation markers, protecting neuronal activity during prolonged inflammatory challenges.
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Affiliation(s)
- B C Borges
- Departamento de Fisiologia, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
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Rigato HM, Borges BC, Sverdloff CE, Moreno RA, Orpineli E, Carter Borges N. Bioavailability of two oral suspension and two oral tablet formulations of nimesulide 100 mg in healthy Brazilian adult subjects. Int J Clin Pharmacol Ther 2010; 48:233-242. [PMID: 20197019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023] Open
Abstract
A specific, fast and sensitive high performance liquid chromatography coupled to an electro spray tandem triple quadrupole mass spectrometer (LC-MS/MS) assay was developed for the determination of nimesulide in human plasma using carbamazepine as the internal standard. The lower limit of quantification (LLOQ) was 50 ng/ml and the calibration curves were linear in the concentration range of 50 - 6,000 ng/ml. Method inter-batch precision and accuracy ranged from 2.78 to 10.80%, and 94.92 to 102.46%, respectively. Intra-batch precision ranged from 2.44 to 7.74%, while intra-batch accuracy ranged from 91.70 to 104.73%. The analytical method was applied to evaluate the pharmacokinetic and relative bioavailability of two different pharmaceutical formulations containing nimesulide, one tablet and one oral suspension, manufactured by the same pharmaceutical factory, comparing with two reference Nisulid formulations in 52 volunteers of both sexes previously divided in two groups of 26 subjects (13 men and 13 females each group). The test tablet formulation was not bioequivalent to the Nisulid 100 mg tablet with respect to the rate of absorption, but was bioequivalent according to the extent of drug absorption. On the other hand, since the 90% CI for Cmax, AUC0-t and AUCinf were within the 80 - 125% interval in the oral suspension study, it was concluded that test oral suspension were bioequivalent to Nisulid 50 mg/ml with respect to both the rate and extent of absorption.
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Affiliation(s)
- H M Rigato
- Department of Medical Clinic, State University of Campinas, Campinas, SP, Brazil
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Rorato R, Castro M, Borges BC, Benedetti M, Germano CMR, Antunes-Rodrigues J, Elias LLK. Adrenalectomy enhances endotoxemia-induced hypophagia: higher activation of corticotrophin-releasing-factor and proopiomelanocortin hypothalamic neurons. Horm Behav 2008; 54:134-42. [PMID: 18374921 DOI: 10.1016/j.yhbeh.2008.02.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2007] [Revised: 02/07/2008] [Accepted: 02/08/2008] [Indexed: 11/19/2022]
Abstract
Inflammatory and infectious processes evoke neuroendocrine and behavioral changes known as acute-phase response that includes activation of the hypothalamo-pituitary-adrenal (HPA) axis and reduction of food intake. Besides its action as the most important ACTH secretagogue, corticotrophin-releasing factor (CRF), synthesized in the paraventricular nucleus (PVN), is also involved in the control of food intake. Alpha-melanocyte stimulating hormone (alpha-MSH) in the arcuate nucleus also plays a role in the energy homeostasis, possessing anorexigenic effects. To investigate the participation of neuropeptides involved in the regulation of food intake during endotoxemia, we administrated lipopolysaccharide (LPS) in sham-operated and adrenalectomized (ADX) male Wistar rats to evaluate food intake, hormone responses and Fos-CRF and Fos-alpha-MSH immunoreactivity in the PVN and arcuate nucleus, as well as CRF and POMC mRNA expression in these hypothalamic nuclei. In sham-operated rats, treatment with LPS (100 microg/kg) showed lower food intake, higher plasma ACTH and corticosterone levels, as well as an increase in Fos-CRF double labeled neurons and CRF mRNA expression in the PVN, with no changes in Fos-alpha-MSH immunoreactivity and POMC mRNA expression in the arcuate nucleus, compared to saline treated rats. After LPS treatment, ADX rats showed further increase in plasma ACTH levels, marked decrease of food intake, higher Fos-CRF immunoreactive neurons in the PVN and CRF mRNA expression, as well as an increase in Fos-alpha-MSH immunoreactivity and POMC mRNA expression in the arcuate nucleus, compared to sham-operated rats treated with LPS. In conclusion, the present data indicate that the marked hypophagia during endotoxemia following ADX is associated with an increased activation of CRF and POMC neurons in the hypothalamus and an increased mRNA expression of these neuropeptides.
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Affiliation(s)
- R Rorato
- Department of Physiology, School of Medicine of Ribeirao Preto, University of Sao Paulo, Brazil
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Borges BC, Antunes-Rodrigues J, Castro M, Bittencourt JC, Elias CF, Elias LLK. Expression of hypothalamic neuropeptides and the desensitization of pituitary-adrenal axis and hypophagia in the endotoxin tolerance. Horm Behav 2007; 52:508-19. [PMID: 17706967 DOI: 10.1016/j.yhbeh.2007.07.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2007] [Revised: 07/04/2007] [Accepted: 07/19/2007] [Indexed: 10/23/2022]
Abstract
Repeated exposure to lipopolysaccharide (LPS) induces desensitization of hypothalamus-pituitary-adrenal axis (HPA) responses and hypophagia. We investigated the interplay between the neural circuitries involved in the control of food intake and HPA axis activity following single or repeated LPS injections. Male Wistar rats received a single or repeated i.p. injection of LPS (100 microg/kg) for 6 days and were subdivided into four groups: 6 saline, 5 saline+1 LPS, 5 LPS+1 saline and 6 LPS. Animals with a single exposure to LPS showed increased plasma levels of ACTH, CORT, PRL, TNF-alpha and also CRF mRNA in the paraventricular nucleus of the hypothalamus. These animals exhibited a reduced food intake and body weight associated with an increase of CART expression in the arcuate nucleus (ARC). Leptin plasma levels were not altered. On the other hand, repeated LPS administration did not alter ACTH, CORT, PRL and TNF-alpha, but it reduced leptin level, compared to single LPS or saline treatment. Furthermore, repeated LPS administration did not increase CRF or CART mRNA expression. Food intake and weight gain after repeated LPS injections were not different from saline-treated animals. There was no change in NPY and POMC mRNA expression in the ARC after single or repeated injections of LPS. In conclusion, desensitization induced by repeated exposure to LPS involves the blockade of HPA axis activation and anorexigenic response, which are both associated with an unresponsiveness of TNF-alpha production and CRF and CART expression in the hypothalamus.
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Affiliation(s)
- B C Borges
- Department of Physiology, School of Medicine of Ribeirao Preto, University of Sao Paulo, Brazil
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