Linked Life Data

10605034

Source:http://linkedlifedata.com/resource/pubmed/id/10605034

Statements in which the resource exists.
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pubmed-article:10605034pubmed:abstractTextThe effects of picolinic acid (PA) on the intramacrophagic growth of Mycobacterium avium were studied. PA reduced M. avium growth inside mouse macrophages and led to a complete control of mycobacterial growth when added together with IFN-gamma. The mechanism involved did not require TNF-alpha, NO, or the respiratory burst, and was not dependent on either iron or zinc withholding. The mycobacteriostatic activity of the macrophages was associated with the induction of morphological changes that culminated in apoptosis at day 4 of treatment. PA alone induced apoptosis in macrophages, and this effect was increased by IFN-gamma treatment. Apoptosis at day 4 of infection was reduced by inhibiting macrophage activation with the prostaglandin 15 deoxy-prostaglandin J2 or by treating the cells with the antioxidant N-acetylcysteine. Mycobacterial growth was partially restored in macrophages treated with PA and IFN-gamma when 15 deoxy-prostaglandin J2 was added, concomitant with a delay in apoptosis. N-Acetylcysteine or glutathione could also completely revert the mycobacteriostatic effects of PA or PA plus IFN-gamma.lld:pubmed
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pubmed-article:10605034pubmed:articleTitleMacrophage control of mycobacterial growth induced by picolinic acid is dependent on host cell apoptosis.lld:pubmed
pubmed-article:10605034pubmed:affiliationLaboratory of Microbiology and Immunology of Infection, Institute for Molecular and Cell Biology, University of Porto, Portugal.lld:pubmed
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