基于线粒体自噬相关基因的哮喘亚型鉴定及预测模型构建研究
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南京医科大学第一附属医院

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R562.25

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国家自然科学基金项目(面上项目,重点项目,重大项目)


Asthma Subtypes Identification and Prediction Model Establishment Based on Mitochondrial Autophagy-Related Genes
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The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    目的:研究哮喘中线粒体自噬相关基因(mitochondrial autophagy-related genes,MRGs)表达情况、构建疾病预测模型,根据MRGs特征对哮喘进行分型并挖掘可能的潜在靶标与治疗药物。方法:基因表达综合数据库中获得哮喘气道上皮转录组学数据,筛选出差异表达MRGs并进行验证;运用机器学习算法构建哮喘预测模型,根据MRGs表达谱分型,基因本体论及京都基因与基因组百科全书分析生物学功能及相关信号通路差异;药物基因组学数据库筛选对应可能的靶向药物。结果:哮喘患者MRGs整体表达较健康受试者显著升高,差异最显著基因为线粒体外膜转位酶 5(translocase of outer mitochondrial membrane 5,TOMM5),其在哮喘患者、小鼠及细胞模型中表达均上调;22个MRGs中筛选出7个疾病最相关特征基因(TOMM5、FUN14结构域蛋白1、 线粒体外膜转位酶 22、自噬接头受体蛋白1、磷酸甘油酸变位酶5、 线粒体融合蛋白2及核糖体蛋白S27a )并以此构建哮喘预测模型,受试者工作特征曲线评估显示预测性能良好;共识聚类分析将哮喘分为2个亚型,两型在基因表达及通路富集方面均存在显著差异;不同分型靶向小分子药物的预测结果分别为XMD8-92和Verrucarin-A。结论:上述7个MRGs可作为哮喘预测的有效分子标志物,研究结果有望为患者疾病分型及个体化治疗提供新的参考依据。

    Abstract:

    Objective: This study investigates the expression of mitochondrial autophagy-related genes (MRGs) in asthma to establish a novel model for disease prediction, and also identifies asthma subtypes based on the MRGs to figure out the potential molecular targeted drugs. Methods: The data of asthmatic airway samples were obtained from gene expression omnibus data base. Differentially expressed MRGs were screened and validated so as to build a model for disease prediction by using machine learning algorithms. According to the different MRGs expression pattern, two subtypes of asthma were defined, and the biological functions and signaling pathways were investigated by gene ontology (GO) and kyoto encyclopedia of genes and genomes (KEGG) analysis to find out the potential agents through connectivity map database. Results: MRGs expression in asthma patients was significantly increased compared to healthy subjects. Among these genes, TOMM5 was found to be the top differentially expressed MRGs which were up-regulated both in asthma patients and asthmatic mice or primary cell models. In 22 MRGs, seven genes (TOMM5, FUNDC1, TOMM22, SQSTM1, PGAM5, MFN2, and RPS27A) were screened to establish a model for disease prediction for its good performance exhibited by receiver operating characteristic curve assessment in asthma. Through consensus cluster analysis, two subtypes of asthma were classified considering the differences of gene expression and pathway enrichment. The predicted small molecule agents targeting these two subtypes were XMD8-92 and Verrucarin-A respectively. Conclusion: Seven MRGs were confirmed to be the effective molecular markers for asthma prediction, and our findings provide valuable evidences and open a new insight for the development of individualized approaches for asthma management.

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  • 收稿日期:2024-02-18
  • 最后修改日期:2024-03-27
  • 录用日期:2024-05-22
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