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| Rugeles,M.T.; Rincón,B.; Rugeles,C.; Montoya,C.J.; Hernández,M.; Estrada,C.; Olivares,M.M.; Patiño,P.J.. |
| Several primary immunodeficiency diseases affecting the interleukin 12/interferon gamma (IFN-gamma) pathway have been identified, most of them characterized by recurrent and protracted infections produced by intracellular microorganisms, particularly by several species of mycobacteria. In the present study we analyzed the expression of IFN-gamma receptor (IFN-gammaR) and signal transducer and activator of transcription 1 (STAT-1) in 4 children with Mycobacterium tuberculosis infection of uncommon clinical presentation. These molecules were evaluated by flow cytometry and Western blotting in B cells transformed with Epstein-Barr virus and mutations were scanned by single-strand conformational polymorphisms and DNA sequencing. The expression of IFN-gammaR1... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mycobacterial disease; IFN-gamma; IFN-gamma receptor; STAT-1; SSCP-PCR. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000900010 |
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| Reis,D.S.; Souza,M.A.; Mineo,J.R.; Espindola,F.S.. |
| Actin-based motor protein requirements and nitric oxide (NO) production are important features of macrophage activity during phagocytosis or microbicidal processes. Different classes of myosins contribute directly or indirectly to phagocytosis by providing mechanical force for phagosome closure or organelle movement. Recent data have shown the presence of myosins IC, II, V and IXb in phagosomes of bone marrow-derived murine macrophages. In our investigation we demonstrated the presence of different classes of myosins in J774 macrophages. We also analyzed the effect of gamma interferon (IFN-gamma), with or without calcium ionophore or cytochalasin B, on myosins as well as on inducible nitric oxide synthase (iNOS) expression and NO production. Myosins IC,... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Myosins; Macrophages; IFN-gamma; INOS. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000200009 |
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| Pereira,C.A.; Modolell,M.; Frey,J.R.; Lefkovits,I.. |
| Macrophages are critical for natural immunity and play a central role in specific acquired immunity. The IFN-gamma activation of macrophages derived from A/J or BALB/c mice yielded two different patterns of antiviral state in murine hepatitis virus 3 infection, which were related to a down-regulation of the main virus receptor. Using cDNA hybridization to evaluate mRNA accumulation in the cells, we were able to identify several genes that are differently up- or down-regulated by IFN-gamma in A/J (267 and 266 genes, respectively, up- and down-regulated) or BALB/c (297 and 58 genes, respectively, up- and down-regulated) mouse macrophages. Macrophages from mice with different genetic backgrounds behave differently at the molecular level and comparison of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gene array; MRNA; Mouse hepatitis virus 3 (MHV3); IFN-gamma; BALB/c mouse; A/J mouse; Macrophages. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004001200005 |
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