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首页> 外文期刊>Cytokine >Effects of an intravenous catheter on the local production of cytokines and soluble cytokine receptors in healthy men.
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Effects of an intravenous catheter on the local production of cytokines and soluble cytokine receptors in healthy men.

机译:静脉内导管对健康男性局部产生细胞因子和可溶性细胞因子受体的影响。

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摘要

Like many aspects of physiology, functions of the immune system show considerable diurnal variation. Studies investigating diurnal variations in the circulating amounts of cytokines, in general, used blood samples obtained from an intravenous catheter. The results of such studies may be confounded by an effect of the catheter on local cytokine production. We measured the levels of IL-6, tumour necrosis factor alpha (TNF-alpha) and soluble TNF receptors (sTNF-R) p55 and p75 in 20 healthy men between 09:00 and 19:00 h in plasma samples obtained from an intravenous catheter and in one additional sample obtained by a simple needle stick in the contralateral arm 10 h after baseline. In plasma from the catheter the levels of IL-6 increased significantly over time, TNF-alpha levels slightly decreased and the time courses of TNF receptor levels showed significant trends of a higher order. Control levels of IL-6, TNF-alpha and sTNF-R p75 measured in plasma obtained by needle stick after 10 h did not differ from baseline, and those of sTNF-R p55 were even higher. We conclude that local alterations in the production of cytokines and soluble cytokine receptors induced by an intravenous catheter represent an important confounding factor for studies investigating diurnal variations in immune functions. Copyright 2000 Academic Press.
机译:像生理学的许多方面一样,免疫系统的功能表现出相当大的昼夜变化。一般而言,研究细胞因子循环量昼夜变化的研究使用的是从静脉内导管获得的血液样本。此类研究的结果可能会因导管对局部细胞因子产生的影响而混淆。我们在从静脉注射获得的血浆样本中,在09:00至19:00 h之间测量了20名健康男性的IL-6,肿瘤坏死因子α(TNF-alpha)和可溶性TNF受体(sTNF-R)p55和p75的水平基线后10小时,通过简单的针刺在对侧臂中获得导管和另一种样本。在导管血浆中,IL-6的水平随时间显着增加,TNF-α的水平略有下降,TNF受体的水平随时间变化显示出明显的高阶趋势。 10小时后通过针刺测得的血浆中IL-6,TNF-α和sTNF-R p75的对照水平与基线无差异,而sTNF-R p55的对照水平更高。我们得出结论,静脉导管诱导的细胞因子和可溶性细胞因子受体产生的局部改变代表了研究免疫功能昼夜变化的重要混杂因素。版权所有2000学术出版社。

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