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目的：探讨丙酮酸乙酯对高动力性肺高压的治疗作用。方法以颈总动脉－颈内静脉套管法建立高动力性肺高压的大鼠模型，实验分为假手术组、分流组、治疗组和对照组，每组10只。治疗组腹腔注射 EP 30 d[50 mg／（kg·d）]，对照组腹腔注射等量生理盐水。治疗后测定各组肺动脉压力，计算右心室肥大指数（RVHI），肺组织切片 HE 染色计算直径厚度百分比（WT％）和管壁面积百分比（WA％），ELISA 法测定血清 TNF-α和 IL-6水平，Western blotting法检测肺组织 NF-κB p65的表达。结果治疗组较对照组肺动脉收缩压和右心室肥大指数明显降低，WT％和WA％明显下降。治疗组较对照组血清中 IL-6和 TNF-α明显降低，NF-κB p65表达明显降低，差异均有统计学意义（P ＜0．05）。结论丙酮酸乙酯可降低高动力性肺动脉高压大鼠内 NF-κB p65的表达，减少细胞因子（TNF-α、IL-6等）的合成释放，减轻炎症反应，抑制肺动脉血管重构从而达到对高动力性肺动脉高压的治疗作用。“,”Objective To evaluate the effects of ethyl pyruvate (EP)on hyperkinetic pulmonary arterial hypertension (PAH).Methods Rat hyperkinetic PAH models were established by shunting common carotid artery and internal jug-ular vein.After that,30 rat models were randomly divided into 3 groups,with 10 rats in each group:EP treatment group,control group,and shunt group.Another 10 rats were enrolled in the sham-operation group as negative controls. Rats in the EP treatment group were given intraperitoneal injection of EP [50 mg /(kg·d)]for 30 days,and rats in the control group were injected with the same volume of normal saline.The systolic pulmonary arterial pressure (SPAP) was measured after that and then the right ventricular hypertrophy index (RVHI)was calculated after the heart was removed.The percentage of diameter thickness (WT%)and wall area (WA%)were calculated in lung tissues stained with HE.The levels of TNF-αand IL-6 in the serum were measured with ELISA and expression of NF-κB p65 in lung tissues was detected with Western blotting.Results Compared with shunt group,EP treatment group had significantly decreased SPAP,RVHI,WT%,WA%,the levels of TNF-αand IL-6 in serum,and expression of NF-κB p65 in lung tissues.Conclusion EP could ameliorate PAH and inhibit the remodeling of pulmonary blood vessels in hyperkinetic PAH rats by reducing the expression of NF-κB p65,synthesis and release of cytokines (TNF-α,IL-6,etc.)and alle-viate inflammation reaction.