Harnessing of TLR-mediated autophagy to combat mycobacteria in macrophages - 01/01/14
Abstract |
Autophagy, an evolutionary highly conserved process in virtually all eukaryotic cells, involves the sequestration of cytosol regions within double-membrane bound compartments and delivery of the contents to the lysosomes for degradation. Rapidly accumulating evidence has shown that autophagy is a component of innate immunity and is involved in host defense elimination of pathogens. Our previous studies show that Toll-like receptor 4 (TLR4) is a sensor for autophagy associated with innate immunity. We, now, further demonstrate that LPS or poly(I:C)-treatment significantly reduced mycobacterial viability in mouse macrophages. In addition, LPS reduction of mycobacterial viability was abrogated with the use of autophagy inhibitor 3-MA and in autophagy deficient macrophages. These findings demonstrate that TLR3 or TLR4 stimulation induces autophagy-mediated elimination of mycobacteria in macrophages. These results provide groundwork for therapeutic strategies directed at elimination of mycobacterial infections in macrophages.
Le texte complet de cet article est disponible en PDF.Keywords : Autophagy, Toll-like Receptors, Mycobacteria tuberculosis, LPS
Plan
Vol 93 - N° S
P. S33-S37 - décembre 2013 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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