Neutrophils can generate oxygen free radicals by respiratory burst. Oxygen free radicals injury is one of the important reasons of ischemia and anoxemia. Low intensity He-Ne laser irradiation combined with Salvia milt...Neutrophils can generate oxygen free radicals by respiratory burst. Oxygen free radicals injury is one of the important reasons of ischemia and anoxemia. Low intensity He-Ne laser irradiation combined with Salvia miltiorrhiza injection(SM) can treat ischemia and anoxemia well in clinic, but the mechanism remains obscure. Primary study on cellular level is needed. In the paper, the effects of low intensity He-Ne laser irradiation, SM, and the combination of low intensity He-Ne laser irradiation and SM on the respiratory burst of bovine neutrophils are examined, respectively. In the study, He-Ne laser, SM or the combination of He-Ne laser and SM all can inhibit the respiratory burst of neutrophils evidently. The effect of the combination of laser and SM is more marked than that of only laser or SM. These results can help to understand the mechanism of ischemic injury.展开更多
目的:观察右美托咪定(Dex)对离体培养的人中性粒细胞(PMN)凋亡率和呼吸爆发功能的影响。方法:取健康人外周静脉血,血浆-Percoll不连续密度梯度离心法分离出PMN,分为对照组,1 ng/m L Dex组,10ng/m L Dex组和100 ng/m L Dex组,离体培养24...目的:观察右美托咪定(Dex)对离体培养的人中性粒细胞(PMN)凋亡率和呼吸爆发功能的影响。方法:取健康人外周静脉血,血浆-Percoll不连续密度梯度离心法分离出PMN,分为对照组,1 ng/m L Dex组,10ng/m L Dex组和100 ng/m L Dex组,离体培养24 h,取培养2 h和24 h的PMN悬液,检测caspase-3活性、PMN凋亡率和呼吸爆发功能。结果:与对照组比较3种不同浓度的Dex与PMN孵育2 h,PMN的caspase-3活性、PMN凋亡率和呼吸爆发功能没有统计学差异;孵育24 h,与对照组比较,1 ng/m L Dex组PMN caspase-3活性、PMN凋亡率和呼吸爆发功能没有差异,而10 ng/m L Dex组和100 ng/m L Dex组PMN caspase-3活性增强、凋亡率增加和呼吸爆发功能下降;与10 ng/m L De组比较,100 ng/m L Dex组PMN caspase-3活性增强、凋亡率增加和呼吸爆发功能下降。结论:临床常用剂量的Dex(血药浓度<1 ng/m L)不影响PMN的凋亡率和呼吸爆发功能,不影响机体的抗感染能力;而大剂量的Dex与PMN孵育一定时间(>24 h)可促进PMN凋亡,降低其呼吸爆发功能。展开更多
文摘Neutrophils can generate oxygen free radicals by respiratory burst. Oxygen free radicals injury is one of the important reasons of ischemia and anoxemia. Low intensity He-Ne laser irradiation combined with Salvia miltiorrhiza injection(SM) can treat ischemia and anoxemia well in clinic, but the mechanism remains obscure. Primary study on cellular level is needed. In the paper, the effects of low intensity He-Ne laser irradiation, SM, and the combination of low intensity He-Ne laser irradiation and SM on the respiratory burst of bovine neutrophils are examined, respectively. In the study, He-Ne laser, SM or the combination of He-Ne laser and SM all can inhibit the respiratory burst of neutrophils evidently. The effect of the combination of laser and SM is more marked than that of only laser or SM. These results can help to understand the mechanism of ischemic injury.
文摘目的:观察右美托咪定(Dex)对离体培养的人中性粒细胞(PMN)凋亡率和呼吸爆发功能的影响。方法:取健康人外周静脉血,血浆-Percoll不连续密度梯度离心法分离出PMN,分为对照组,1 ng/m L Dex组,10ng/m L Dex组和100 ng/m L Dex组,离体培养24 h,取培养2 h和24 h的PMN悬液,检测caspase-3活性、PMN凋亡率和呼吸爆发功能。结果:与对照组比较3种不同浓度的Dex与PMN孵育2 h,PMN的caspase-3活性、PMN凋亡率和呼吸爆发功能没有统计学差异;孵育24 h,与对照组比较,1 ng/m L Dex组PMN caspase-3活性、PMN凋亡率和呼吸爆发功能没有差异,而10 ng/m L Dex组和100 ng/m L Dex组PMN caspase-3活性增强、凋亡率增加和呼吸爆发功能下降;与10 ng/m L De组比较,100 ng/m L Dex组PMN caspase-3活性增强、凋亡率增加和呼吸爆发功能下降。结论:临床常用剂量的Dex(血药浓度<1 ng/m L)不影响PMN的凋亡率和呼吸爆发功能,不影响机体的抗感染能力;而大剂量的Dex与PMN孵育一定时间(>24 h)可促进PMN凋亡,降低其呼吸爆发功能。