PHAGOCYTOSIS OF STAPHYLOCOCCUS-AUREUS INDUCES A SELECTIVE STRESS RESPONSE IN HUMAN MONOCYTES-MACROPHAGES (M-CIRCLE-DOT) - MODULATION BY M-CIRCLE-DOT DIFFERENTIATION AND BY IRON

被引:52
作者
KANTENGWA, S [1 ]
POLLA, BS [1 ]
机构
[1] UNIV HOSP GENEVA,ALLERGY UNIT,CH-1211 GENEVA 14,SWITZERLAND
关键词
D O I
10.1128/IAI.61.4.1281-1287.1993
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
Phagocytosis of microorganisms represents a stress not only for the phagocytosed agent but also for the host cell. We have investigated the stress response induced in human monocytes-macrophages (Mphi) phagocytosing inactivated Staphylococcus aureus. Exposure of human Mphi to S. aureus induced in these cells (i) a threefold increase in superoxide dismutase activity, (ii) a selective and differentiation-dependent induction of host heat shock protein synthesis (HSP70 but not HSP65), and (iii) de novo synthesis of heme oxygenase, but only when exogenous iron was added to the cultures. The coordinate upregulation of two scavenging enzymes and of HSP70 suggests that all three are part of cellular protective mechanisms against phagocytosis-related oxidative injury to host cells.
引用
收藏
页码:1281 / 1287
页数:7
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