Regulation of neutrophil apoptosis: a role for protein kinase C and phosphatidylinositol-3-kinase
Neutrophils play a central role in host defense and are recruited in vast numbers to sites of infection where they phagocytose and kill invading bacterial pathogens. Neutrophils have a short half-life that is extended at the inflamed site by pro-inflammatory cytokines and contact with bacterial cell...
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| Veröffentlicht in: | Apoptosis (London) 2000-11, Vol.5 (5), p.451-458 |
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| container_title | Apoptosis (London) |
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| creator | Webb, P R Wang, K Q Scheel-Toellner, D Pongracz, J Salmon, M Lord, J M |
| description | Neutrophils play a central role in host defense and are recruited in vast numbers to sites of infection where they phagocytose and kill invading bacterial pathogens. Neutrophils have a short half-life that is extended at the inflamed site by pro-inflammatory cytokines and contact with bacterial cell walls. Normal resolution of inflammation involves the removal of neutrophils and other inflammatory cells by the induction of apoptosis. Spontaneous neutrophil apoptosis does not require Fas ligation, but is mediated by caspases 3, 8 and possibly caspase 9 and also involves activation of protein kinase C-delta. With chronic inflammatory disease, neutrophil apoptosis is delayed by pro-inflammatory cytokines, leading to persistence of neutrophils at the inflamed site and non-specific tissue damage. Here we discuss the evidence for inhibition of neutrophil apoptosis via signaling though PI-3-kinase and downstream pathways, including PDK-1 and PKB. Therapeutic strategies to resolve chronic inflammation could therefore usefully target neutrophil apoptosis and the PI-3-kinase or PKC-delta signaling pathways. |
| doi_str_mv | 10.1023/A:1009601220552 |
| format | Article |
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Neutrophils have a short half-life that is extended at the inflamed site by pro-inflammatory cytokines and contact with bacterial cell walls. Normal resolution of inflammation involves the removal of neutrophils and other inflammatory cells by the induction of apoptosis. Spontaneous neutrophil apoptosis does not require Fas ligation, but is mediated by caspases 3, 8 and possibly caspase 9 and also involves activation of protein kinase C-delta. With chronic inflammatory disease, neutrophil apoptosis is delayed by pro-inflammatory cytokines, leading to persistence of neutrophils at the inflamed site and non-specific tissue damage. Here we discuss the evidence for inhibition of neutrophil apoptosis via signaling though PI-3-kinase and downstream pathways, including PDK-1 and PKB. 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| subjects | Animals Apoptosis Apoptosis - immunology Apoptosis - physiology Cytokines - immunology Humans Inflammation - enzymology Inflammation - immunology Inflammation - pathology Kinases Neutrophils - cytology Neutrophils - enzymology Neutrophils - immunology Phosphatidylinositol 3-Kinases - physiology Protein Kinase C - physiology Regulation |
| title | Regulation of neutrophil apoptosis: a role for protein kinase C and phosphatidylinositol-3-kinase |
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