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Eicosanoids regulate whether human and murine macrophages infected with Mycobacterium tuberculosis die by apoptosis or necrosis. The death modality is important since apoptosis is associated with diminished pathogen viability and should be viewed as a form of innate immunity. Apoptotic vesicles derived from infected macrophages are also an important source of bacterial antigens that can be acquired...
Group 1 and group 2 CD1 present both self and microbial lipid antigens to T cells. While group 1 CD1-restricted T cells are known for their ability to recognize mycobacterial glycolipid antigens, group 2 CD1-restricted T cells are recognized as regulatory T cells that can influence the outcome of innate and adaptive immune responses. The evidence that these T cells contribute to host defense against...
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