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| Id: | 26659
| | Autor: | Shimizu, Toshiaki; Tomioka, Haruaki; Matsuoka, Masanori; Sano, Chiaki. | | Título: | Profiles of the mRNA expression by macrophages infected with mycobacterium leprae and mycobacterium avium complex.
| | Fonte: | Int. J. Lepr;70(4):250-259, Dec., 2002. ilus, tab.
| | Resumo: | In the present study, we examined profiles of the interaction of Mycobacterium leprae and Mycobacterium avium complex (MAC) with murine peritoneal macrophages (M phi s) in terms of up-regulation of M phi expression of proinflammatory and immunosuppressing cytolines (CKs) after infection. First, the reverse transcription polymerase chain reaction (RT-PCR) assay revealed that both MAC and M. leprae infections up-regulated M phi mRNA expression IL-12, TNF-alpha, IL-10, and transformating growth factor-beta (TGF-beta), except that M. leprae-infected M phi s showed no increase in the IL-12 mRNA expression. Second, the RT-PCR assay also showed some differences between M. leprae- and MAC-infected M phi s with respect to the modes of IL-10 and inducible nitric oxide synthase (iNOS) mRNA expression. That is MAC, but not M. leprae, infection caused a prolonged increase in the expression of IL-10 and iNOS mRNAs. Third, a ribonuclease protection assay revealed that M phi s co-infected with MAC and M. leprae showed the Il-12, TNF-alpha and IL-10 mRNA expression in an intermediate mode of those of M phi s infected with either M. leprae or MAC alone. This implies that the CK expression of M. leprae-infected M phi s may be modified by co-infection with MAC. These findings may suggest differential interactions of M. leprae and MAC organisms with murine peritoneal M phi s in terms of the activation of signal transduction pathways for expression of some kinds of immunoregulatory cytokines and immunoprotective enzymes.(AU)^ien.
| | Descritores: | RNA/genet
RNA/imunol
Macrófagos/citol
Macrófagos/fisiol
Mycobacterium avium/citol
Mycobacterium avium/genet
Mycobacterium leprae/citol
Mycobacterium leprae/genet
| | Meio Eletrônico: | http://hansen.bvs.ilsl.br/textoc/revistas/intjlepr/2002/pdf/v70n4/v70n4a02.pdf - en.
| | Localização: | BR191.1 |
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