mortality/aging
• mice exhibit increased mortality after Streptococcus pneumoniae SP6303 intratracheal instillation, indicating increased susceptibility to bacterial pneumonia
• however, mice infected with the Gram-negative bacteria P. aeruginosa show no difference in survival from wild-type mice
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immune system
• mice exhibit increased susceptibility to bacterial pneumonia, with bronchoalveolar lavage (BAL) fluid 4 days post infection with S. pneumoniae showing increased bacterial burden, increased inflammatory infiltrates in the lungs, and increased concentrations of proinflammatory chemokines and cytokines (CXCL2, CCL3, CCL4, IL-6, and IL-1beta) in BAL fluid and serum
• however, no differences in cellular levels of Coq9, Coq10 or the reduced forms (ubiquinol) in heart. lung, and bone marrow-derived macrophages, in ubiquinone concentrations in bone marrow-derived macrophages infected with S. pneumoniae, no evidence of increased mitochondrial proliferation, and normal calcium flux in macrophages after stimulation with the S. pneumonia toxin
• mild, but significant, impairment of intracellular S. pneumoniae killing by bone marrow-derived macrophage and bone marrow-derived macrophages and alveolar macrophages show no induction of mitochondrial reactive oxygen species (mtROS) production after S. pneumoniae challenge as is seen in wild-type cells
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• mice exhibit increased mortality after Streptococcus pneumoniae SP6303 intratracheal instillation, indicating increased susceptibility to bacterial pneumonia
• however, mice infected with the Gram-negative bacteria P. aeruginosa show no difference in survival from wild-type mice
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cellular
• heart muscle from S. pneumoniae infected mice shows reduced electron transport chain complex activities 2 days post infection
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• alveolar macrophages stimulated with pneumolysin, the major pneumococcal toxin, exhibit greatly reduced oxidative phosphorylation within 1 hour of pneumolysin exposure
• however, extracellular acidification rate (indicative of glycolysis) in alveolar macrophages stimulated with pneumolysin is reduced similarly as in wild-type alveolar macrophages
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