摘要
目的探讨过敏性紫癜(HSP)患儿血清对人脐静脉内皮细胞(HUVEC)炎症损伤的作用及甲基泼尼松龙(甲泼尼龙)在其中的调节作用。方法人脐静脉内皮细胞培养分为4组:空白对照组、正常血清组、HSP血清组及甲泼尼龙干预组。分别检测各组上清液白细胞介素-8(IL-8)、肿瘤坏死因子-α(TNF-α)和一氧化氮(NO)水平;半定量RT-PCR和Western blot法检测HUVEC中核因子-κB(NF-κB)和不规则趋化因子(Fractalkine)mRNA及蛋白表达。结果 HSP血清组上清液IL-8、TNF-α和NO水平均高于空白对照组和正常血清组(P<0.05),甲泼尼龙干预组上清液IL-8、TNF-α和NO水平较HSP血清组明显降低(P<0.05);HSP血清组HUVEC中NF-κB和FractalkinemRNA表达量明显高于空白对照组(P<0.05),两者的蛋白表达量明显高于空白对照组和正常血清组(P<0.05);甲泼尼龙干预组HUVEC中NF-κB和Fractalkine mRNA及蛋白表达量较HSP血清组明显降低(P<0.05)。结论 HSP急性期患儿血清可以诱导体外培养的HUVEC活化并分泌炎性细胞因子,甲泼尼龙可能通过抑制NF-κB表达、减少炎性因子产生而减轻血管炎症。
Objective To observe the changes of human umbilical venous endothelial cells（HUVECs） induced by the sera from children with active Henoch-Schnlein purpura（HSP） and the protective effects of methylprednisolone against HUVECs injury.Methods HUVECs were divided into four groups based on the culture conditions：blank control group,normal serum group,HSP serum group,and HSP serum plus methylprednisolone group.The levels of tumor necrosis factor（TNF）-α and interleukin（IL）-8 in the supernatants of each group were detected using ELISA and the nitric oxide（NO） level by nitrate reductase determination.Moreover,the expressions of nuclear factor-kappa B（NF-κB） and Fractalkine in HUVECs were examined by semiquantitative reverse transcription polymerase chain reaction（RT-PCR） and Western blot,respectively.Results The levels of IL-8,TNF-α,and NO in the HSP serum group were significantly higher than those in the blank control and normal serum groups（P0.05）.Compared with the HSP serum group,the levels of IL-8,TNF-α,and NO in the HSP serum plus methylprednisolone group decreased significantly（P0.05）.The mRNA expression levels of NF-κB and Fractalkine in the HSP serum group were significantly higher than those in the blank control group（P0.05）.The protein expression levels of NF-κB and Fractalkine in the HSP serum group were significantly higher than those in the blank control and normal control group（P0.05）.Compared with the HSP serum group,the mRNA and protein expression levels of NF-κB and Fractalkine in the HSP serum plus methylprednisolone group decreased significantly（P0.05）.Conclusions The sera from children with active HSP can induce the in vitro cultured HUVECs to become activated and excrete cytokines.Methylprednisolone may inhibit NF-κB expression,reduce the production of inflammatory factors,and thus alleviate vascular inflamation.
出处
《中国当代儿科杂志》
CAS
CSCD
北大核心
2012年第1期59-63,共5页
Chinese Journal of Contemporary Pediatrics
基金
安徽医科大学第一附属医院博士科研启动基金项目(2008-2011)
安徽医科大学2010年度校科研基金项目(No.2010xkj056)
2011年安徽省自然基金项目(No.11040606M168)
关键词
过敏性紫癜
细胞因子
甲泼尼龙
内皮细胞
Henoch-Schnlein purpura
Cytokine
Methylprednisolone
Human umbilical venous endothelial cell
