| Author | Losada-Barragán, Monica | |
| Author | Umaña-Pérez, Adriana | |
| Author | Durães, Jonathan | |
| Author | Cuervo-Escobar, Sergio | |
| Author | Rodríguez-Vega, Andrés | |
| Author | Ribeiro-Gomes, Flávia L. | |
| Author | Berbert, Luiz R. | |
| Author | Morgado, Fernanda | |
| Author | Porrozzi, Renato | |
| Author | Cruz, Daniella Arêas Mendes da | |
| Author | Aquino, Priscila | |
| Author | Carvalho, Paulo C. | |
| Author | Savino, Wilson | |
| Author | Sánchez-Gómez, Myriam | |
| Author | Padrón, Gabriel | |
| Author | Cuervo, Patricia | |
| Access date | 2019-09-12T12:55:09Z | |
| Available date | 2019-09-12T12:55:09Z | |
| Document date | 2019 | |
| Citation | LOSADA-BARRAGÁN, Monica et al. Thymic Microenvironment Is Modified by Malnutrition and Leishmania infantum Infection. Frontiers in Cellular and Infection Microbiology, v. 9, p. 1-19, July 2019. | pt_BR |
| ISSN | 2235-2988 | pt_BR |
| URI | https://www.arca.fiocruz.br/handle/icict/35518 | |
| Language | eng | pt_BR |
| Publisher | Frontiers Media | pt_BR |
| Rights | open access | |
| Subject in Portuguese | Leishmania infantum | pt_BR |
| Subject in Portuguese | Timo | pt_BR |
| Subject in Portuguese | Microambiente tímico | pt_BR |
| Subject in Portuguese | Desnutrição protéica | pt_BR |
| Subject in Portuguese | Fluido intersticial | pt_BR |
| Subject in Portuguese | Leishmaniose visceral | pt_BR |
| Subject in Portuguese | Proteômica | pt_BR |
| Subject in Portuguese | Oxidação de ácidos graxos | pt_BR |
| Title | Thymic Microenvironment Is Modified by Malnutrition and Leishmania infantum Infection | pt_BR |
| Type | Article | |
| DOI | 10.3389/fcimb.2019.00252 | |
| Abstract | Detrimental effects of malnutrition on immune responses to pathogens have long been recognized and it is considered a main risk factor for various infectious diseases, including visceral leishmaniasis (VL). Thymus is a target of both malnutrition and infection, but its role in the immune response to Leishmania infantum in malnourished individuals is barely studied. Because we previously observed thymic atrophy and significant reduction in cellularity and chemokine levels in malnourished mice infected with L. infantum, we postulated that the thymic microenvironment is severely compromised in those animals. To test this, we analyzed the microarchitecture of the organ and measured the protein abundance in its interstitial space in malnourished BALB/c mice infected or not with L. infantum. Malnourished-infected animals exhibited a significant reduction of the thymic cortex:medulla ratio and altered abundance of proteins secreted in the thymic interstitial fluid. Eighty-one percent of identified proteins are secreted by exosomes and malnourished-infected mice showed significant decrease in exosomal proteins, suggesting that exosomal carrier system, and therefore intrathymic communication, is dysregulated in those animals. Malnourished-infected mice also exhibited a significant increase in the abundance of proteins involved in lipid metabolism and tricarboxylic acid cycle, suggestive of a non-proliferative microenvironment. Accordingly, flow cytometry analysis revealed decreased proliferation of single positive and double positive T cells in those animals. Together, the reduced cortical area, decreased proliferation, and altered protein abundance suggest a dysfunctional thymic microenvironment where T cell migration, proliferation, and maturation are compromised, contributing for the thymic atrophy observed in malnourished animals. All these alterations could affect the control of the local and systemic infection, resulting in an impaired response to L. infantum infection. | pt_BR |
| Affilliation | Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Pesquisa em Leishmanioses. Rio de Janeiro, RJ, Brasil / Universidad Antonio Nariño. Departamento de Biologia. Grupo de Investigación en Biología Celular y Funcional e Ingeniería de Biomoléculas. Bogotá, Colombia. | pt_BR |
| Affilliation | Universidad Nacional de Colombia. Departamento de Química. Grupo de Investigación en Hormonas. Bogotá, Colombia. | pt_BR |
| Affilliation | Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Pesquisa em Leishmanioses. Rio de Janeiro, RJ, Brasil. | pt_BR |
| Affilliation | Universidad de Ciencias Aplicadas y Ambientales. Facultad de Ciencias. Bogotá, Colombia; | pt_BR |
| Affilliation | Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Pesquisa em Leishmanioses. Rio de Janeiro, RJ, Brasil. | pt_BR |
| Affilliation | Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Pesquisa em Malária. Rio de Janeiro, RJ, Brasil. | pt_BR |
| Affilliation | Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Pesquisas sobre o Timo. Rio de Janeiro, RJ, Brasil. | pt_BR |
| Affilliation | Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Pesquisa em Leishmanioses. Rio de Janeiro, RJ, Brasil. | pt_BR |
| Affilliation | Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Pesquisa em Leishmanioses. Rio de Janeiro, RJ, Brasil. | pt_BR |
| Affilliation | Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Pesquisas sobre o Timo. Rio de Janeiro, RJ, Brasil / Instituto Nacional de Ciência e Tecnologia em Neuroimunomodulação. Rio de Janeiro, RJ, Brasil. | pt_BR |
| Affilliation | Fundação Oswaldo Cruz. Instituto Leônidas e Maria Deane. Manaus, AM, Brasil. | pt_BR |
| Affilliation | Fundação Oswaldo Cruz. Grupo de Espectrometria de Massa Computacional e Proteômica. Rio de Janeiro, RJ, Brasil. | pt_BR |
| Affilliation | Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Pesquisas sobre o Timo. Rio de Janeiro, RJ, Brasil / Instituto Nacional de Ciência e Tecnologia em Neuroimunomodulação. Rio de Janeiro, RJ, Brasil. | pt_BR |
| Affilliation | Universidad Nacional de Colombia. Departamento de Química. Grupo de Investigación en Hormonas. Bogotá, Colombia. | pt_BR |
| Affilliation | Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Pesquisa em Leishmanioses. Rio de Janeiro, RJ, Brasil. | pt_BR |
| Affilliation | Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Pesquisa em Leishmanioses. Rio de Janeiro, RJ, Brasil. | pt_BR |
| Subject | Thymus | pt_BR |
| Subject | Thymic microenvironment | pt_BR |
| Subject | Protein malnutrition | pt_BR |
| Subject | Leishmania infantum | pt_BR |
| Subject | Visceral leishmaniasis | pt_BR |
| Subject | Interstitial fluid | pt_BR |
| Subject | Proteomics | pt_BR |
| Subject | Fatty acid oxidation | pt_BR |
| xmlui.metadata.dc.subject.ods | 02 Fome zero e agricultura sustentável | |
