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Macrophages are the principal source of TNFα, yet they are highly resistant to TNFα-mediated cell death. Previously, employing in vitro differentiated human macrophages, we showed that following the inhibition of NF-κB, TNFα-induced caspase-8 activation contributes to DNA fragmentation but is not necessary for the loss of the inner mitochondrial transmembrane potential (ΔΨm) or cell death. We here...
Resistance of T cells to activation-induced cell death (AICD) is associated with autoimmunity and lymphoproliferation. We found that apigenin (4′,5,7-trihydroxyflavone), a non-mutagenic dietary flavonoid, augmented both extrinsic and intrinsic pathways of apoptosis in recurrently activated, but not in primarily stimulated, human blood CD4+ T cells. Apigenin potentiated AICD by inhibiting NF-κB activation...
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