...
首页> 外文期刊>Platelets >Effects of selective cyclooxygenase isoform inhibition on systemic prostacyclin synthesis and on platelet function at rest and after exercise in healthy volunteers.
【24h】

Effects of selective cyclooxygenase isoform inhibition on systemic prostacyclin synthesis and on platelet function at rest and after exercise in healthy volunteers.

机译:选择性环氧合酶同工型抑制对健康志愿者静息和运动后全身前列环素合成及血小板功能的影响。

获取原文
获取原文并翻译 | 示例
           

摘要

To test the hypothesis that selective inhibition of cyclooxygenase (COX)-2 would result in exercise-induced platelet activation by causing a shift in the endogenous thromboxane (TX)/prostacyclin balance, a double blind, randomized study comparing aspirin (300 mg/d) with rofecoxib (25 mg/d) (cross-over design, 14 days washout between treatments) in n = 10 trained healthy volunteers was carried out. Physical exercise resulted only in a minor platelet activation, as reflected by the expression of basal or ADP-stimulated platelet activation markers or basal plasma concentrations of TXB(2). Aspirin significantly reduced TXB(2) in plasma while rofecoxib significantly increased TXB(2) in urine. Although no increase in systemic prostacyclin concentration was observed, there was a significant exercise-related increase in both platelet cAMP and cGMP without any drug-related effects. It is concluded that, in trained healthy volunteers, selective inhibition of COX-1 (aspirin) or COX-2 (rofecoxib) does not affect systemic prostacyclin synthesis after physical exercise. However, our data do not exclude the possibility that in subjects at risk for atherothrombotic complications (e.g. patients with advanced atherosclerotic disease) COX-2 inhibitors may result in platelet activation by inhibiting endothelial prostacyclin formation.
机译:为了检验选择性抑制环氧合酶(COX)-2会导致内源性血栓烷(TX)/前列环素平衡发生变化而导致运动诱导的血小板活化的假说,这项双盲,随机比较的研究比较了阿司匹林(300 mg / d )接受rofecoxib(25 mg / d)(交叉设计,治疗之间14天洗脱)于n = 10训练有素的健康志愿者中进行。体育锻炼仅导致较小的血小板活化,这是由基础或ADP刺激的血小板活化标记物的表达或TXB(2)的基础血浆浓度所反映的。阿司匹林显着降低血浆TXB(2),而罗非昔布显着增加尿液TXB(2)。尽管未观察到全身前列环素浓度增加,但血小板cAMP和cGMP均与运动有关而显着增加,而没有任何药物相关作用。结论是,在训练有素的健康志愿者中,体育锻炼后选择性抑制COX-1(阿司匹林)或COX-2(罗非考昔)不会影响全身性前列环素的合成。但是,我们的数据并未排除在有动脉粥样硬化血栓形成并发症风险的受试者(例如患有晚期动脉粥样硬化疾病的患者)中,COX-2抑制剂可能会通过抑制内皮前列环素的形成而导致血小板活化。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号