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第43卷第7期 南京医科大学学报(自然科学版)
2023年7月 Journal of Nanjing Medical University(Natural Sciences) ·945 ·
·基础研究·
hsa_circ_0005389在新生儿急性呼吸窘迫综合征细胞炎症模型
中的作用研究
游铭钰 ,周 欢 ,张宇涵 ,李冰洁 ,陈筱青 1*
1
1
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南京医科大学第一附属医院儿科,江苏 南京 210029;空军军医大学附属唐都医院儿科,陕西 西安 710038
1 2
[摘 要] 目的:基于人环状RNA(circular RNA,circRNA)高通量测序和生物信息学分析结果,研究hsa_circ_0005389与新生
儿急性呼吸窘迫综合征(neonatal acute respiratory distress syndrome,NARDS)的关系,以期为NARDS的诊断和治疗提供新的方
向。方法:建立脂多糖(lipopolysaccharide,LPS)诱导急性肺损伤细胞模型。通过 RT⁃qPCR及Western blot检测炎性标志物及相
关通路指标在阴性对照组和敲低 hsa_circ_0005389 表达的干预组中的表达变化情况,同时用 CCK⁃8 与流式细胞仪检测正常
A549 细胞与建立急性肺损伤模型的 A549 细胞敲低或者过表达 hsa_circ_0005389 后的增殖与凋亡情况。结果:RT⁃qPCR 及
Western blot 结果显示,A549 细胞暴露于 10 μg/cm LPS 48 h 时,各炎性标志物及相关通路指标高表达(P < 0.05)。与阴性对
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照组相比,敲低 hsa_circ_0005389 表达后,A549 细胞中可溶性肿瘤坏死因子受体 1(soluble tumor necrosis factor receptor 1,
sTNFR1)mRNA 相对表达量和肿瘤坏死因子⁃α(tumor necrosis factor α,TNF⁃α)蛋白表达量显著降低(P < 0.05);在急性肺损伤
模型中,敲低hsa_circ_0005389表达后,各炎性标志物及相关通路指标mRNA相对表达量均下降(P < 0.001)。CCK⁃8与流式细
胞仪检测结果显示,与阴性对照组相比,敲低hsa_circ_0005389表达的A549 细胞增殖加快,凋亡率降低(P < 0.05),而过表达
hsa_circ_0005389后A549细胞增殖减慢,凋亡率增加(P < 0.05)。结论:急性肺损伤细胞模型中,hsa_circ_0005389促进肺损伤
炎性标志物的表达,并且影响肺上皮细胞的增殖和凋亡,提示hsa_circ_0005389 参与NARDS的炎症过程,可能是NARDS潜在
的干预靶标。
[关键词] hsa_circ_0005389;新生儿急性呼吸窘迫综合征;炎症;环状RNA;肺损伤
[中图分类号] R563.8 [文献标志码] A [文章编号] 1007⁃4368(2023)07⁃945⁃09
doi:10.7655/NYDXBNS20230707
Experimental study on the involvement of hsa_circ_0005389 in the inflammatory process of
neonatal acute respiratory distress syndrome
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YOU Mingyu ,ZHOU Huan ,ZHANG Yuhan ,LI Bingjie ,CHEN Xiaoqing
Department of Pediatrics,the First Affiliated Hospital of Nanjing Medical University,Nanjing 210029;Department
1 2
of Pediatrics,Tangdu Hospital,Air Force Military Medical University,Xi’an 710038,China
[Abstract] Objective:The current study aims to investigate the relationship between hsa_circ_0005389 and neonatal acute
respiratory distress syndrome(NARDS)based on high ⁃ throughput sequencing and bioinformatics analysis of human circular RNA
(circRNA)to provide a new direction for the diagnosis and treatment of NARDS. Methods:The acute lung injury model was induced
by lipopolysaccharide(LPS). The expression of inflammatory markers and related pathway indexes were detected by RT⁃qPCR and
Western blot in the negative control group and the intervention group with knockdown of hsa_circ_0005389 expression. CCK⁃8 and
flow cytometry were used to detect the proliferation and apoptosis of blank A549 cells and A549 cells with establishment of acute lung
injury model,both of which were knocked⁃down or over⁃expressed hsa_circ_0005389. Result:The mRNA relative expression and the
protein expression of inflammatory markers and related pathway indexes were highly expressed and increased significantly after
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exposed to 10 μg/cm LPS for 48 h(P < 0.05). Compared with the negative control group,the relative mRNA expression level of
soluble tumor necrosis factor receptor 1(sTNFR1)and the protein expression of tumor necrosis factor α(TNF⁃α)in A549 cells were
[基金项目] 国家自然科学基金(81871195)
∗
通信作者(Corresponding author),E⁃mail:xqchen@njmu.edu.cn