己酮茶碱在马内毒素血症全血模型中抑制介质合成。

Circulatory shock Pub Date : 1994-12-01
M H Barton, J N Moore
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引用次数: 0

摘要

取10匹健康马全血,无菌放入肝素或柠檬酸抗凝剂中,在不含(生理盐水对照)或内毒素1 ng /ml血液的情况下体外培养6小时。内毒素检测前1小时、同时1小时或内毒素检测后1小时加入己酮茶碱(0.1、1、10、100微克/毫升血)。与生理盐水对照相比,除了显著增加6-酮前列腺素F1 α浓度外,单独的己酮茶碱对介质的产生没有影响。己酮茶碱以剂量相关的方式抑制内毒素诱导的肿瘤坏死因子(TNF)和白细胞介素-6 (IL-6)活性的升高,无论是在内毒素之前、同时添加还是在内毒素之后添加。己酮茶碱对组织因子活性有显著抑制作用,但仅在内毒素前添加。己酮茶碱对内毒素诱导的6-酮-前列腺素F1 α的产生没有影响,但显著抑制血栓素B2 (TxB2)的产生。本研究结果表明,在与体内浓度一致的血液浓度下,己酮茶碱可能对内毒素血症的治疗有益。
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Pentoxifylline inhibits mediator synthesis in an equine in vitro whole blood model of endotoxemia.

Whole blood from 10 healthy horses was aseptically collected into heparin or citrate anticoagulant and incubated in vitro for 6 hr in the absence (saline control) or presence of 1 ng endotoxin/ml blood. Pentoxifylline (0.1, 1, 10, or 100 micrograms/ml blood) was added 1 hr before, at the same time, or 1 hr after endotoxin. As compared to saline controls, pentoxifylline alone had no effect on mediator production, with the exception of significantly increasing 6-ketoprostaglandin F1 alpha concentration. Pentoxifylline inhibited endotoxin-induced increases in tumor necrosis factor (TNF) and interleukin-6 (IL-6) activity in a dose-related fashion, whether added before, at the same time, or after endotoxin. Pentoxifylline significantly inhibited tissue factor activity, but only when added before endotoxin. Pentoxifylline had no effect on endotoxin-induced 6-keto-prostaglandin F1 alpha production, but significantly inhibited thromboxane B2 (TxB2) production. The results of this study indicate that pentoxifylline, at blood concentrations consistent with those achieved in vivo, has effects that may be beneficial in the treatment of endotoxemia.

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