The effect of Pentoxifylline (PTX) on type 1 diabetes was investigated by means of the studies on the expressions of cytokine mRNA in pancreas and the Fas-FasL on islet cells of NOD mice. NOD mice were treated with PT...The effect of Pentoxifylline (PTX) on type 1 diabetes was investigated by means of the studies on the expressions of cytokine mRNA in pancreas and the Fas-FasL on islet cells of NOD mice. NOD mice were treated with PTX from 4-6?wk, and then from 8-12?wk. After treatment, it was found that the incidence of diabetes in NOD mice at ages of 30?wk was reduced to 25% in group of mice treated with PTX, in comparison to 73.3% in case of mice injected with PBS, and the degree of insulitis in the PTX treated mice was lower than that of the PBS injected mice. RT-PCR analysis revealed down-regulatory effect on the expressions of IFN-γ and TNF-α mRNA in PTX treated mice, but there was no any effect on the expression of IL-10. As to the expression of Fas, there was marked decrease in the mean cytoplasmic integral optical density (IOD) in PTX treated mice, but there was little difference between PTX and PBS groups in the expression of FasL. These results indicated that PTX could prevent the development of diabetes in NOD mice, which might be related to the regulation of Th1/Th2 imbalance and the decreased expression of Fas in islet cells.展开更多
目的探讨肺缺血-再灌注损伤(PIRI)时Fas/FasL蛋白表达的变化及葛根素(Pue)的干预。方法采用在体兔单肺原位PIRI模型。实验兔90只,随机分为假手术对照组(sham,30只)、PIRI组(30只)和Pue组(30只)。每组又分为再灌注1,3,5 h 3个亚组,每个亚...目的探讨肺缺血-再灌注损伤(PIRI)时Fas/FasL蛋白表达的变化及葛根素(Pue)的干预。方法采用在体兔单肺原位PIRI模型。实验兔90只,随机分为假手术对照组(sham,30只)、PIRI组(30只)和Pue组(30只)。每组又分为再灌注1,3,5 h 3个亚组,每个亚组10只,分别于再灌注1,3,5 h 3个时间点取左肺组织,观察Fas/FasL蛋白的表达、凋亡指数(AI)、肺损伤组织学定量评价指标(IQA)及光镜、电镜下的组织形态学改变。结果PIRI 1、3、5 h,Pue组Fas/FasL mRNA在肺小动脉内(外)膜、肺小静脉内膜、肺泡上皮及肺支气管上皮呈弱阳性表达,明显低于同一时间点PIRI组(P<0.05);AI和IQA值显著低于PIRI组(P<0.01和P<0.05);肺组织形态学异常改变不同程度减轻。结论Pue可下调肺组织Fas/FasL蛋白的表达而减轻细胞凋亡,对PIRI发挥积极的防治作用。展开更多
文摘The effect of Pentoxifylline (PTX) on type 1 diabetes was investigated by means of the studies on the expressions of cytokine mRNA in pancreas and the Fas-FasL on islet cells of NOD mice. NOD mice were treated with PTX from 4-6?wk, and then from 8-12?wk. After treatment, it was found that the incidence of diabetes in NOD mice at ages of 30?wk was reduced to 25% in group of mice treated with PTX, in comparison to 73.3% in case of mice injected with PBS, and the degree of insulitis in the PTX treated mice was lower than that of the PBS injected mice. RT-PCR analysis revealed down-regulatory effect on the expressions of IFN-γ and TNF-α mRNA in PTX treated mice, but there was no any effect on the expression of IL-10. As to the expression of Fas, there was marked decrease in the mean cytoplasmic integral optical density (IOD) in PTX treated mice, but there was little difference between PTX and PBS groups in the expression of FasL. These results indicated that PTX could prevent the development of diabetes in NOD mice, which might be related to the regulation of Th1/Th2 imbalance and the decreased expression of Fas in islet cells.
文摘目的探讨肺缺血-再灌注损伤(PIRI)时Fas/FasL蛋白表达的变化及葛根素(Pue)的干预。方法采用在体兔单肺原位PIRI模型。实验兔90只,随机分为假手术对照组(sham,30只)、PIRI组(30只)和Pue组(30只)。每组又分为再灌注1,3,5 h 3个亚组,每个亚组10只,分别于再灌注1,3,5 h 3个时间点取左肺组织,观察Fas/FasL蛋白的表达、凋亡指数(AI)、肺损伤组织学定量评价指标(IQA)及光镜、电镜下的组织形态学改变。结果PIRI 1、3、5 h,Pue组Fas/FasL mRNA在肺小动脉内(外)膜、肺小静脉内膜、肺泡上皮及肺支气管上皮呈弱阳性表达,明显低于同一时间点PIRI组(P<0.05);AI和IQA值显著低于PIRI组(P<0.01和P<0.05);肺组织形态学异常改变不同程度减轻。结论Pue可下调肺组织Fas/FasL蛋白的表达而减轻细胞凋亡,对PIRI发挥积极的防治作用。
