Encontrados 5 documentos, a visualizar página 1 de 1
Poor immune reconstitution in HIV-infected patients associates with high percen...
Horta, Ana; Nóbrega, Cláudia; Machado, Pedro Amorim; Teixeira, Vítor Emanuel Coutinho; Silva, Palmira Barreira; Boavida, Susana; Costa, Patrício SoaresCD4(+) regulatory T cells (Tregs) are essential for the maintenance of the immune system's equilibrium, by dampening the activation of potential auto-reactive T cells and avoiding excessive immune activation. To correctly perform their function, Tregs must be maintained at the right proportion with respect to effector T cells. Since this equilibrium is frequently disrupted in individuals infected with the human...
T Cells home to the thymus and control infection
Nóbrega, Cláudia; Alves, Cláudio; Rodrigues, Bruno Cerqueira; Roque, Susana; Silva, Palmira Barreira; Behar, Samuel M.; Neves, Margarida CorreiaThe thymus is a target of multiple pathogens. How the immune system responds to thymic infection is largely unknown. Despite being considered an immune-privileged organ, we detect a mycobacteria-specific T cell response in the thymus following dissemination of Mycobacterium avium or Mycobacterium tuberculosis. This response includes proinflammatory cytokine production by mycobacteria-specific CD4(+) and CD8(+) ...
T cells home to the thymus and control infection
Nóbrega, Cláudia; Alves, Cláudio Nunes; Rodrigues, Bruno Miguel Cerqueira; Roque, Susana; Silva, Palmira Barreira da; Behar, Samuel M.The thymus is a target of multiple pathogens. How the immune system responds to thymic infection is largely unknown. Despite being considered an immune-privileged organ, we detect a mycobacteria-specific T cell response in the thymus following dissemination of Mycobacterium avium or Mycobacterium tuberculosis. This response includes proinflammatory cytokine production by mycobacteria-specific CD4(+) and CD8(+) ...
Molecular and cellular mechanisms of Mycobacterium avium-induced thymic atrophy
Borges, Margarida; Silva, Palmira Barreira; Flórido, Manuela; Jordan, Michael B.; Neves, Margarida Correia; Appelberg, RuiThymic atrophy has been described as a consequence of infection by several pathogens and shown to be induced through diverse mechanisms. Using the mouse model of Mycobacterium avium infection, we show in this study that the production of NO from IFN-γ–activated macrophages plays a major role in mycobacterial infection-induced thymic atrophy. Our results show that disseminated infection with a highly virulent st...
Interplay between depressive-like behavior and the immune system in an animal m...
Roque, Susana; Oliveira, Tiago Gil; Nóbrega, Cláudia; Silva, Palmira Barreira; Alves, Cláudio Nunes; Sousa, Nuno; Palha, Joana AlmeidaGlucocorticoids, namely dexamethasone, are prescribed during late gestation in pregnancies at risk of originating premature newborns, to promote fetal lung maturation. However, adverse early life events have been reported to induce long-lasting changes in the immune and central nervous systems. The accumulating evidence on bidirectional interactions between both systems in psychiatric disorders like depression,...
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