重组人CC16蛋白抑制香烟烟雾提取物诱导的人气道上皮细胞及COPD小鼠肺组织衰老相关分泌表型  

Recombinant human CC16 protein inhibits cigarette smoke extract-in-duced senescence-associated secretory phenotype in human bronchial epi-thelial cells and lung tissues from COPD mice

作　　者：杜凯艳 李婷[2] 刘超锋[2] 栗馨洋 张晶煜 郭民 陈朝阳 庞敏[2] 王海龙[1] DU Kaiyan;LI Ting;LIU Chaofeng;LI Xinyang;ZHANG Jingyu;GUO min;CHEN Zhaoyang;PANG Min;WANG Hailong(Basic Medical Science Center,School of Basic Medicine,Shanxi Medical University,Jinzhong 030600,China;Depart-ment of Pulmonary and Critical Care Medicine,the First Hospital,Shanxi Medical University,Shanxi Province Key Labora-tory of Respiratory Disease,Taiyuan 030001,China;The Center of Experimental Animals,Shanxi Medical University,Jinzhong 030600,China)

机构地区：[1]山西医科大学基础医学研究中心,基础医学院,山西晋中030600 [2]山西医科大学第一医院呼吸与危重症医学科,呼吸疾病防治与基础研究山西省重点实验室,山西太原030001 [3]山西医科大学实验动物中心,山西晋中030600

出　　处：《中国病理生理杂志》2025年第2期294-302,共9页Chinese Journal of Pathophysiology

基　　金：山西省留学回国人员科技活动择优资助项目(No.20240042);山西省省筹资金资助回国留学人员科研项目(No.2022-191);山西省高等教育“百亿工程”科技引导专项(No.BYJL061)。

摘　　要：目的:评价重组人CC16蛋白(recombinant human CC16 protein,rhCC16)对香烟烟雾提取物(cigarette smoke extract,CSE)诱导的人气道上皮细胞(human bronchial epithelial cells,HBECs)及慢性阻塞性肺疾病(chronic obstructive pulmonary disease,COPD)小鼠肺组织衰老相关分泌表型(senescence-associated secretory phenotype,SASP)的影响,并探讨其机制。方法:5%CSE诱导HBECs衰老,250 ng/mL rhCC16干预衰老的HBECs,2',7'-二氯二氢荧光素二乙酸酯(2',7'-dichlorodihydrofluorescein diacetate,DCFH-DA)染色法分析HBECs内活性氧(reactive oxygen species,ROS)含量;Western blot检测衰老相关异染色灶(senescence associated heterochromatic foci,SAHF)标志物第9位赖氨酸三甲基化的组蛋白H3(trimethylated histone H3 at lysine 9,H3K9me3)含量;RT-qPCR和ELISA分别检测HBECs中SASP指标[白细胞介素1β(interleukin-1β,IL-1β)、IL-6、IL-8、趋化因子(C-X-C基序)配体1[chemokine(C-X-C motif)ligand 1,CXCL-1]、基质金属蛋白酶1(matrix metalloproteinase 1,MMP1)和MMP3的mRNA和蛋白表达。被动吸烟法制备COPD小鼠,从熏烟16周开始,在熏烟前2 h用2.5μg/g体重rhCC16或等体积PBS对熏烟小鼠进行滴鼻干预制备COPD+rhCC16组或COPD+PBS组,造模及干预(24周)结束后DCFH-DA染色法检测小鼠肺组织细胞中ROS含量,Western blot检测各组小鼠肺组织SAHF标志物H3K9me3含量;RT-qPCR和ELISA分别检测小鼠肺组织及肺组织匀浆液中SASP相关指标(IL-1β、IL-6、IL-8、CXCL-1、MMP1和MMP3)的mRNA和蛋白表达。结果:DCFH-DA染色结果显示CSE刺激可以增加HBECs中ROS含量,rhCC16干预则减少HBECs中ROS含量(P<0.01);Western blot结果显示CSE刺激可以增加HBECs的SAHF,而rhCC16干预则减少SAHF(P<0.01);RT-qPCR和ELISA结果显示CSE刺激可以增加HBECs中IL-1β、IL-6、IL-8、CXCL-1、MMP1和MMP3 mRNA表达及其蛋白含量,rhCC16干预则减少HBECs中上述指标的表达(P<0.05);DCFH-DA染色结果显示COPD小鼠肺组织细胞中ROS含量增加,rhCC16干预则减少其含�AIM:To investigate the impact of recombinant human CC16 protein(rhCC16)on cigarette smoke extract(CSE)-induced senescence-associated secretory phenotype(SASP)in human bronchial epithelial cells(HBECs)and in the lung tissues of chronic obstructive pulmonary disease(COPD)mice,and to explore the underlying mechanism.METHODS:HBECs were induced into cellular senescence using 5%CSE.The senescent HBECs were treated with 250 ng/mL rhCC16,and the levels of reactive oxygen species(ROS)were assessed using the 2',7'-dichlorodihydrofluorescein diacetate(DCFH-DA)method.The levels of trimethylated histone H3 at lysine 9(H3K9me3),a marker of senescenceassociated heterochromatic foci(SAHF),were detected using a Western blot assay.RT-qPCR and ELISA were utilized to measure the mRNA expression and protein levels of SASP components including interleukin-1 beta(IL-1β),IL-6,IL-8,chemokine(C-X-C motif)ligand-1(CXCL-1),matrix metalloproteinase 1(MMP1)and MMP3.Passive smoking was conducted for six months to induce COPD in mice.RhCC16(2.5μg/g body weight)or an equal volume of PBS(20μL)was intranasally administered from the 16th week of smoking in the COPD+rhCC16 group or COPD+PBS group,respectively,with administration 2 hours before smoking.ROS levels in lung tissue cells were investigated using DCFH-DA staining.H3K9me3 levels in lung tissues were tested using Western blot assay.RT-qPCR and ELISA were performed to examine the mRNA expression and protein levels of IL-1β,IL-6,IL-8,CXCL-1,MMP1 and MMP3.RESULTS:DCFH-DA staining results showed that CSE stimulation increased ROS levels in HBECs,while rhCC16 treatment reduced them(P<0.01).Western blot results indicated that CSE stimulation elevated H3K9me3 levels in HBECs,which were decreased with rhCC16 treatment(P<0.01).RT-qPCR and ELISA assays demonstrated that CSE stimulation upregulated the mRNA and protein levels of IL-1β,IL-6,IL-8,CXCL-1,MMP1 and MMP3 in HBECs,which were reduced with rhCC16 administration(P<0.05).DCFH-DA staining results showed an increase in ROS levels in the lung t

关 键 词：慢性阻塞性肺疾病 重组人CC16蛋白 香烟烟雾提取物 活性氧 第9位赖氨酸三甲基化组蛋白H3 衰老相关分泌表型 

分 类 号：R563[医药卫生—呼吸系统] R363[医药卫生—内科学] Q419[医药卫生—临床医学]