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目的:探讨磷脂酰肌醇3-激酶（phosphoinositide 3-kinase，PI3K）/蛋白激酶B（protein kinase B，AKT）/核因子κB（NF-κB）信号通路在人肾小管上皮细胞（human kideny-2，HK-2）-尿酸性肾病细胞模型中表达水平变化及其作用机制。方法:体外培养HK-2细胞，随机分为对照组及实验组。实验组经高尿酸（720 μmol/L）浸泡48 h建立体外尿酸性肾病细胞模型，分为高尿酸处理组、过表达蛋白激酶活化受体2（protease activated receptor 2，PAR2）组和敲减PAR2组。实时定量PCR法检测HK-2细胞PAR2、PI3K、AKT、NF-κB的mRNA表达水平，Western印迹法检测HK-2细胞PAR2、PI3K、AKT、NF-κB蛋白表达水平，酶联免疫吸附法检测上清液肿瘤坏死因子-α（tumor necrosis factor-α，TNF-α）、单核细胞趋化蛋白-1（monocyte chemotactic protein-1，MCP-1）、白细胞介素-6（interleukin-6，IL-6）、白细胞介素-1β前体（pro-interleukin-1β，pro-IL-1β）、白细胞介素-1β（interleukin-1β，IL-1β）、转化生长因子-β1（transforming growth factor-β1，TGF-β1）表达水平。结果:（1）与对照组相比，高尿酸处理组HK-2细胞中PAR2、PI3K、AKT、NF-κB的mRNA及蛋白表达增加（均n P<0.05），上清液中TNF-α、MCP-1、IL-6、pro-IL-1β、IL-1β、TGF-β1增加（均n P<0.01）。（2）与高尿酸处理组相比，过表达PAR2组HK-2细胞中PAR2、PI3K、AKT、NF-κB的mRNA及蛋白表达明显增加（均n P<0.05），上清液中TNF-α、MCP-1、IL-6、IL-1β、TGF-β1明显增加（均n P<0.05）。（3）与高尿酸处理组相比，敲减PAR2组HK-2细胞PAR2、PI3K、AKT、NF-κB的mRNA及蛋白表达明显下降（均n P<0.05），上清液中IL-6、pro-IL-1β、IL-1β、TGF-β1明显减少（均n P<0.05）。n 结论:尿酸致肾脏HK-2细胞损伤过程中，尿酸通过激活PAR2显著上调PI3K/AKT/NF-κB信号通路表达，导致HK-2细胞炎症损伤明显加重。敲减PAR2抑制PI3K/AKT/NF-κB信号通路，可有效减轻HK-2细胞炎症损伤。“,”Objective:To investigate the effects and underlying mechanisms of phosphoinositide 3-kinase (PI3K)/protein kinase B (AKT)/NF-κB signaling pathway in human kidney-2(HK-2) cells of hyperuricemic nephropathy.Methods:HK-2 cells were cultured n in vitro and randomly divided into control group and experimental group. The experimental group was induced by high uric acid (720 μmol/L) immersion for 48 h to establish a cell model of hyperuricemic nephropathy in vitro and subsequently divided into hyperuricemic group, overexpressed protease activated receptor 2 (PAR2) and knockdown PAR2 group. The expressions of PAR2, PI3K, AKT, NF-κB mRNA were measured by real-time PCR. The expressions of PAR2, PI3K, AKT and NF-κB protein were measured by Western blotting. The expressions of tumor necrosis factor-α (TNF-α), monocyte chemotactic protein-1 (MCP-1), interleukin-6 (IL-6), pro-interleukin-1β (pro-IL-1β), interleukin-1β (IL-1β) and transforming growth factor-β1 (TGF-β1) were detected by enzyme linked immunosorbent assay (ELISA).n Results:(1) Compared with the control group, the expressions of PAR2, PI3K, AKT and NF-κB mRNA and protein in hyperuricemic group were significantly increased (alln P<0.05), the expressions of TNF-α, MCP-1, IL-6, pro-IL-1β, IL-1β and TGF-β1 in the supernatant in hyperuricemic group were significantly increased (alln P<0.01). (2) Compared with the hyperuricemic group, the expressions of PAR2, PI3K, AKT and NF-κB mRNA and protein in overexpressed PAR2 group were significantly increased (alln P<0.05), the expressions of TNF-α, MCP-1, IL-6, IL-1β and TGF-β1 in the supernatant were significantly increased (alln P<0.05). (3) Compared with the hyperuricemic group, the expression of PAR2, PI3K, AKT and NF-κB mRNA and protein in knockdown PAR2 group were significantly decreased (alln P<0.05), the expressions of IL-6, pro-IL-1β, IL-1β and TGF-β1 in the supernatant were significantly decreased (alln P<0.05).n Conclusions:In the process of uric acid-induced HK-2 cell damage, uric acid significantly up-regulates the expression of PI3K/AKT/NF-κB signaling pathway by activating PAR2, leading to a marked increase in inflammatory damage. Knocking down PAR2 inhibits the expression of PI3K/AKT/NF-κB signaling pathway, which can effectively reduce the inflammatory damage of HK-2 cells.