Intracellular C3 Protects Human Airway Epithelial Cells from Stress-associated Cell Death

Abstract excerpt

Abstract The complement system provides host defense against pathogens and environmental stress. C3, the central component of complement, is present in the blood and increases in BAL fluid after injury. We recently discovered that C3 is taken up by certain cell types and cleaved intracellularly to C3a and C3b. C3a is required for CD4+ T-cell survival. These observations made us question whether complement...

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