中国病理生理杂志2025，Vol.41Issue(2)：294-302,9.DOI:10.3969/j.issn.1000-4718.2025.02.010
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
摘要
Abstract
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 senescence-associated 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 con-ducted for six months to induce COPD in mice.RhCC16(2.5 μg/g body weight)or an equal volume of PBS(20 μL)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 admin-istration(P＜0.05).DCFH-DA staining results showed an increase in ROS levels in the lung tissues of COPD mice,which were decreased with rhCC16 administration(P＜0.01).Western blot data revealed an increase in H3K9me3 levels in the lung tissues of COPD mice,which were reduced with rhCC16 treatment(P＜0.01).RT-qPCR and ELISA assays demon-strated an upregulation of the mRNA and protein levels of IL-1β,IL-6,IL-8,CXCL-1,MMP1 and MMP3 in the lung tis-sues of COPD mice,which were reduced with rhCC16 treatment(P＜0.05).No statistically significant differences were ob-served in the above-mentioned indicators between the lung tissues of COPD and COPD+PBS mice(P＞0.05).CONCLU-SION:rhCC16 can effectively inhibit CSE-induced SASP in HBECs and in the lung tissues of COPD mice,with its under-lying mechanism potentially related to the inhibition of the ROS-H3K9me3 signaling pathway.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Key words
chronic obstructive pulmonary disease/recombinant human CC16 protein/cigarette smoke ex-tract/reactive oxygen species/trimethylated histone H3 at lysine/senescence-associated secretory phenotype分类
临床医学引用本文复制引用
杜凯艳,李婷,刘超锋,栗馨洋,张晶煜,郭民,陈朝阳,庞敏,王海龙..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[J].中国病理生理杂志,2025,41(2):294-302,9.基金项目
山西省留学回国人员科技活动择优资助项目(No.20240042) （No.20240042）
山西省省筹资金资助回国留学人员科研项目(No.2022-191) （No.2022-191）
山西省高等教育"百亿工程"科技引导专项(No.BYJL061) （No.BYJL061）
