IL-8 AS A CIRCULATING CYTOKINE - INDUCTION BY RECOMBINANT TUMOR-NECROSIS-FACTOR-ALPHA

被引:0
作者
SHERON, N
WILLIAMS, R
机构
基金
英国惠康基金;
关键词
TUMOR NECROSIS FACTOR; IL-8; HEPATITIS-B; SEPTIC SHOCK;
D O I
暂无
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
Tumour necrosis factor-alpha (TNF-alpha) is a pivotal cytokine at the centre of a cascade of cytokines and inflammatory mediators which modulate the host response to infection and trauma, and in particular the metabolic changes resulting in shock and subsequent multi-organ failure. The cytokine IL-8-predominantly an activator and chemotactic factor for circulating polymorphonuclear neutrophil leucocytes-is produced in response to TNF-alpha in vitro, and high circulating levels of IL-8 are found in septic primates. We have studied the release of IL-8 into the circulation of subjects with chronic hepatitis B undergoing a 10 week pilot trial of recombinant TNF-alpha (rTNF-alpha) therapy in doses of 15-100-mu-g/m2. A marked dose-dependent increase in plasma IL-8 levels was seen commencing at 30-60 min after the start of rTNF-alpha infusion and peaking between 2 and 3 h (mean peak level 4300 ng/l). The temporal pattern of IL-8 production exactly echoed that of IL-6, another component of the cytokine cascade, but peak plasma levels of IL-8 were up to 17 times higher than those of IL-6. This study confirms in vitro data suggesting that IL-8 is a component of the acute circulating cytokine cascade with a potential role in the modulation of the acute immune and metabolic response to infection and trauma.
引用
收藏
页码:100 / 103
页数:4
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