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南京医科大学学报(自然科学版)                                  第41卷第6期
               ·826 ·                     Journal of Nanjing Medical University(Natural Sciences)   2021年6月





              Wnt5a对中性粒细胞胞外诱捕网形成的影响



              陆   敏  1,2,3 ,卢 伟  1,2,3 ,杨 勰  1,2,3 ,孙 颖  1,2,3*
               南京医科大学附属口腔医院牙周科,南京医科大学江苏省口腔疾病研究重点实验室,江苏省口腔转化医学工程中心,江苏
              1                            2                                     3
              南京 210029




             [摘    要] 目的:探讨Wnt5a对中性粒细胞胞外诱捕网(neutrophil extracellular trap,NET)形成的影响及可能的调控机制。方
              法:采用 50 ng/mL Wnt5a 刺激人中性粒细胞 3 h,以 1 μg/mL 牙龈卟啉单胞菌(Porphyromonas gingivalis,P.gingivalis)脂多糖(li⁃
              popolysaccharide,LPS)和1 μg/mL大肠杆菌(Escherichia coli,E.coli)LPS作为阳性对照,采用免疫荧光技术观察NET的形成,Sy⁃
              tox Green 荧光法对胞外 DNA 进行定量,采用流式细胞术检测细胞产生的活性氧(reactive oxygen species,ROS)水平,Western
              blot分析信号分子磷脂酰肌醇三激酶(phosphoinositide 3⁃kinase,PI3K)/Akt和丝裂原活化蛋白激酶1/2(mitogen⁃activated protein
              kinase1/2,MEK1/2)、细胞外信号调节蛋白激酶 1/2(extracellular regulated protein kinases1/2,ERK1/2)表达水平的变化。结果:
              Wnt5a刺激人中性粒细胞后,可观察到NET的形成和胞外DNA数量的增加(P < 0.05),ROS水平较刺激前明显增高(P < 0.05),
              Western blot 检测显示,PI3K/Akt 和 MEK1/2、RK1/2 磷酸化水平增高(P < 0.05)。结论:Wnt5a 可能通过 PI3K/Akt、MEK1/2、
              ERK1/2磷酸化,调控ROS生成,进而促进人中性粒细胞形成NET。
             [关键词] Wnt5a;中性粒细胞胞外诱捕网;ROS;PI3K/Akt;MEK1/2⁃ERK1/2
             [中图分类号] R392.12                   [文献标志码] A                       [文章编号] 1007⁃4368(2021)06⁃826⁃06
              doi:10.7655/NYDXBNS20210606


              Effects of Wnt5a on the formation of neutrophil extracellular trap

              LU Min 1,2,3 ,LU Wei 1,2,3 ,YANG Xie 1,2,3 ,SUN Ying 1,2,3*
              1 Department of Periodontology,the Affiliated Stomatological Hospital of Nanjing Medical University,Jiangsu Key
                                                                                                    2
              Laboratory of Oral Diseases of Nanjing Medical University,Jiangsu Province Enginecring Research Center of
                                                                   3
              Stomatological Translational Medicine,Nanjing 210029,China


             [Abstract] Objective: This study aims to observe the effects and mechanisms of Wnt5a on the formation of neutrophil extracellular
              trap(NET). Methods:Neutrophils were stimulated with 50 ng/mL Wnt5a for 3 h,1 μg/mL Porphyromonas gingivalis(P.gingivalis)
              lipopolysaccharide(LPS)and 1 μg/mL Escherichia coli(E.coli)LPS were served as positive controls. Formation of NET was observed
              by immunofluorescence staining,and extracellular DNA was quantified by Sytox Green fluorescence staining. Levels of reactive oxygen
              species(ROS)were detected by flow cytometry,and activations of phosphatidylinositol 3⁃kinase(PI3K)/Akt,mitogen⁃activated protein
              kinase 1/2(MEK1/2)and extracellular regulated protein kinases 1/2(ERK1/2)were explored by Western blot. Results:Compared with
              neutrophils without stimulations,Wnt5a stimulation led to the formation of NET and the increased levels of extracellular DNA(P <
              0.05). In addition,levels of ROS and phosphorylations of PI3K/Akt,MEK1/2 and ERK1/2 were significantly increased in the cells
              treated with Wnt5a(P < 0.05). Conclusion:Wnt5a might contribute to the formation of NET depending on the production of ROS and
              the phosphorylations of PI3K/Akt,MEK1/2 and ERK1/2.
             [Key words] Wnt5a;NET;ROS;PI3K/Akt;MEK1/2⁃ERK1/2
                                                                            [J Nanjing Med Univ,2021,41(06):826⁃831]





             [基金项目] 国家自然科学基金(81771075);江苏高校优势学科建设工程资助项目(2018⁃87);南京医科大学科技发展基金
             (2016NJMU052)
              ∗
              通信作者(Corresponding author),E⁃mail: ebolasun@njmu.edu.cn
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