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Registros recuperados: 6
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B cells expressing IL-10 mRNA modulate memory T cells after DNA-Hsp65 immunization BJMBR
Fontoura,I. C.; Trombone,A.P.F.; Almeida,L. P.; Lorenzi,J. C. C.; Rossetti,R. A. M.; Malardo,T.; Padilha,E.; Schluchting,W.; Silva,R. L. L.; Gembre,A. F.; Fiuza,J. E. C.; Silva,C. L.; Panunto-Castelo,A.; Coelho-Castelo,A. A. M..
In DNA vaccines, the gene of interest is cloned into a bacterial plasmid that is engineered to induce protein production for long periods in eukaryotic cells. Previous research has shown that the intramuscular immunization of BALB/c mice with a naked plasmid DNA fragment encoding the Mycobacterium leprae 65-kDa heat-shock protein (pcDNA3-Hsp65) induces protection against M. tuberculosis challenge. A key stage in the protective immune response after immunization is the generation of memory T cells. Previously, we have shown that B cells capture plasmid DNA-Hsp65 and thereby modulate the formation of CD8+ memory T cells after M. tuberculosis challenge in mice. Therefore, clarifying how B cells act as part of the protective immune response after DNA...
Tipo: Info:eu-repo/semantics/article Palavras-chave: DNA-Hsp65 vaccine; Memory T cells; B cells.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015001201095
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BAFF promotes regulatory T-cell apoptosis and blocks cytokine production by activating B cells in primary biliary cirrhosis BJMBR
Zhang,Bo; Hu,Mintao; Zhang,Peng; Cao,Hong; Wang,Yongzhen; Wang,Zheng; Su,Tingting.
Primary biliary cirrhosis (PBC) is a chronic and slowly progressive cholestatic liver disease of autoimmune etiology. A number of questions regarding its etiology are unclear. CD4+CD25+ regulatory T cells (Tregs) play a critical role in self-tolerance and, for unknown reasons, their relative number is reduced in PBC patients. B-cell-activating factor (BAFF) is a key survival factor during B-cell maturation and its concentration is increased in peripheral blood of PBC patients. It has been reported that activated B cells inhibit Treg cell proliferation and there are no BAFF receptors on Tregs. Therefore, we speculated that excessive BAFF may result in Treg reduction via B cells. To prove our hypothesis, we isolated Tregs and B cells from PBC and healthy...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Primary biliary cirrhosis; Regulatory T cells; BAFF; B cells; Bezafibrate.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013000500433
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Frequency of B cells in normal mice which recognize self proteins BJMBR
The mechanism whereby the immune system avoids self-aggression is one of the central issues of Immunology. The discovery of natural autoantibodies, mainly of IgM isotype, and of idiotypic interactions between antibodies indicates that elements of the immune system interact with self constituents and with themselves. Results of studies with soluble antibodies have indicated that the pool of circulating IgM represents the end result of a highly selective process of B cells activation and differentiation by self proteins resulting in the formation of a network. The objective of the present work was to determine the frequency of self-reacting B cells in normal mice. We were able to detect B cells that recognize self proteins present in extracts of different...
Tipo: Info:eu-repo/semantics/other Palavras-chave: B cells; Self-recognition; Ig repertoire; BALB/c mice; C57BL/6 mice; LPS-stimulated spleen cells.
Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997000200010
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Glucocorticoid susceptibility and in vivo ABCB1 activity differ in murine B cell subsets Anais da ABC (AABC)
COSTA,KELLI M. DA; VALENTE,RAPHAEL C.; SILVA,JOYLE M.C. DA; PAIVA,LUCIANA S. DE; RUMJANEK,VIVIAN M..
Abstract Glucocorticoids are produced and released by the adrenal gland and become elevated in response to stress. Although glucocorticoids are well known for their immunosuppressive effects, less is known about their effects on B cells. ABCB1 is an efflux pump expressed in both cancer and normal cells, modulating the gradient of various metabolites, including hydrocortisone. Our goal was to evaluate the effect of this glucocorticoid on murine B cell differentiation and whether sensitivity to hydrocortisone could be related to ABCB1 activity in vivo. C57BL/6 mice received one or three consecutive i.p. injections of hydrocortisone (70, 140 and 200 mg/kg/day). ABCB1 activity was evaluated via the rhodamine-123 transport and inhibited by cyclosporin A in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: ABC transporters; B cells; Immunoregulation; Steroid.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000603081
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In silico approach for viral mutations and sustainability of immunizations. Repositório Alice
CASTRO, A. de.
In this paper we use virtual samples of individuals and a dynamical modeling proposed in a previous study to study the behavior of immune memory against antigenic mutation.
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Memória imunológica; Imunologia computacional; Estocasticidade; Mutação viral; Células B; Vacina; Immune memory; Computational immunology; Viral mutation; Stochasticity; B cells; Imunologia; Mutação; Immunology; Immunologic memory; Mutation; Stochastic processes; Vaccines.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1030086
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Prolonged acceptance of skin grafts induced by B cells places regulatory T cells on the histopathology scene BJMBR
Langier,S.; Galvani,R.G.; Alves,A.P.G.; Fidelis,R.; Nunes,P.H.C.; Silva,M.H.; Castilho,L.R.; Monteiro,J.P.; Bonomo,A..
The participation of regulatory T (Treg) cells in B cell-induced T cell tolerance has been claimed in different models. In skin grafts, naive B cells were shown to induce graft tolerance. However, neither the contribution of Treg cells to B cell-induced skin tolerance nor their contribution to the histopathological diagnosis of graft acceptance has been addressed. Here, using male C57BL/6 naive B cells to tolerize female animals, we show that skin graft tolerance is dependent on CD25+ Treg cell activity and independent of B cell-derived IL-10. In fact, B cells from IL-10-deficient mice were able to induce skin graft tolerance while Treg depletion of the host inhibited 100% graft survival. We questioned how Treg cell-mediated tolerance would impact on...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Skin graft; Tolerance; B cells; Treg; Histopathology.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012001000009
Registros recuperados: 6
Primeira ... 1 ... Última
 

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