摘要
目的 观察己酮可可碱 (PTX)对呼吸道合胞病毒 (RSV)所诱导的人肺泡灌洗液巨噬细胞肿瘤坏死因子 (TNF α)含量及TNF αmRNA表达水平的影响。方法 收集咳嗽患者正常镜像的支气管肺泡灌洗液巨噬细胞 ,随机分成三组 :(1)对照组 (NOR组 ) ;(2 )感染组 (RSV组 )加入10 6pfu的RSV ;(3 )己酮可可碱组 (PTX组 )RSV感染后加入PTX (1mg/ml)。每组于RSV感染2 0h后 ,用ELISA法测定培养细胞上清中TNF α含量的变化 ,用逆转录聚合酶链反应 (RT PCR)测定各组巨噬细胞TNF αmRNA表达水平。结果 感染组中TNF αmRNA表达水平与对照组相比明显增多。PTX组TNF αmRNA的表达和感染组相比明显降低。TNF α的含量也有相应的变化 :与对照组比较 ,感染组明显升高 (P <0 .0 1) ;而PTX组与感染组比较明显下降 (P <0 .0 1)。结论 PTX能抑制RSV所诱导的人肺泡巨噬细胞TNF α的基因表达 ,并减少TNF α的产生。
Objective To investigate the effect of pentoxifylline (PTX) on the expression of the TNF-α mRNA and the amount of TNF-α induced by RSV-infected human bronchoalveolar flruid (BALF) macrophages.Methods Human BALF macrophages were collected and divided into the following three groups:(1)control group; (2) infected group,with 106 pfu RSV in the culture medium; (3) PTX group,in which 1 mg/ml of PTX was added after RSV infection. Twenty hours after the RSV infection, the mRNA expression level of TNF-α gene was analysed by RT-PCR and the TNF-α protein level was measured by the ELISA.Results In comparison with the control group,the expression of TNF-α mRNA was increased in the infected group,while this induction was inhibited in the PTX group.Similar results were also obtained when the content of TNF-α protein was studied by ELISA:PTX could reduce the high levels of TNF-α in the infected group (P<0.01).Conclusion PTX exerts an inhibitory effect on the expression of the TNF-α mRNA,as well as on the production of TNF-α protein.
出处
《临床内科杂志》
CAS
北大核心
2001年第3期190-192,共3页
Journal of Clinical Internal Medicine
