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中华肾病研究电子杂志 ›› 2023, Vol. 12 ›› Issue (03) : 156 -162. doi: 10.3877/cma.j.issn.2095-3216.2023.03.007

论著

膜性肾病中M2巨噬细胞相关基因的生物信息学分析
吴琼, 朱国贞()   
  1. 030001 太原,山西医科大学第二医院肾内科
  • 收稿日期:2022-09-06 出版日期:2023-06-28
  • 通信作者: 朱国贞
  • 基金资助:
    山西省自然科学研究面上项目(202103021224420)

Bioinformatic analysis of genes associated with M2 macrophages in membranous nephropathy

Qiong Wu, Guozhen Zhu()   

  1. Department of Nephrology, Second Hospital of Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
  • Received:2022-09-06 Published:2023-06-28
  • Corresponding author: Guozhen Zhu
引用本文:

吴琼, 朱国贞. 膜性肾病中M2巨噬细胞相关基因的生物信息学分析[J]. 中华肾病研究电子杂志, 2023, 12(03): 156-162.

Qiong Wu, Guozhen Zhu. Bioinformatic analysis of genes associated with M2 macrophages in membranous nephropathy[J]. Chinese Journal of Kidney Disease Investigation(Electronic Edition), 2023, 12(03): 156-162.

目的

通过生物信息学分析探讨膜性肾病(MN)中有关M2巨噬细胞的免疫分子机制。

方法

从基因表达集(GEO)数据库下载微阵列数据集(GSE104948和GSE108109,其中GSE108109作为验证数据集),使用Timer数据库进行免疫浸润分析。以M2巨噬细胞作为表型进行加权基因共表达网络分析,筛选M2巨噬细胞相关核心基因。从差异表达基因和核心基因的交集确定潜在关键基因。利用数据集GSE108109验证潜在关键基因的表达水平,以接受者操作特征(ROC)曲线分析评估其诊断价值。

结果

M2巨噬细胞在MN组和正常对照组之间显著不同。确定了6个M2巨噬细胞相关的关键基因:PPARGC1A、ESRRG、KCNJ16、HLF、HGD和SULT1C2。ROC曲线分析显示,以上6个基因的ROC曲线下面积值均大于0.85。

结论

本研究发现了有关MN中M2巨噬细胞的6个基因,尚需进一步研究验证其在MN中的作用。

Objective

This study aimed to explore the immune molecular mechanisms related to M2 macrophages in membranous nephropathy (MN) through bioinformatics analysis.

Methods

Microarray datasets (GSE104948 and GSE108109, with GSE108109 as the validation dataset) were downloaded from the Gene Expression Omnibus (GEO) database. And immune infiltration analysis was performed using the Timer database. M2 macrophages were used as a phenotype for weighted gene co-expression network analysis in order to screen M2 macrophage-related hub genes. Differentially expressed genes and the hub genes were then intersected to identify potential key genes. Meanwhile, the expression levels of the potential key genes were validated in dataset GSE108109, and their diagnostic value was assessed by the receiver operating characteristics (ROC) curve analysis.

Results

M2 macrophages were significantly different between the MN patients and normal controls. Six M2 macrophages-related key genes were identified including PPARGC1A, ESRRG, KCNJ16, HLF, HGD, and SULT1C2. The ROC curve analysis showed that values of the area under the ROC curve of the key 6 genes were greater than 0.85.

Conclusions

This study identified six key genes related to M2 macrophages in MN, and further research is needed to verify their roles in MN.

图1 差异表达基因的火山图和热图注:A:差异表达基因的火山图,横坐标log2(差异表达倍数)为差异表达倍数以2为底的对数值,纵坐标-log10(P值)为显著性水平以10为底的负对数值;B:差异表达基因的热图
图2 膜性肾病与正常对照组免疫细胞浸润对比注:A:膜性肾病组和对照组中免疫细胞在不同样本中的相对百分比,横坐标代表不同样本,纵坐标代表免疫细胞在样本中的表达量;B:膜性肾病组和正常对照组之间免疫细胞浸润的小提琴图,横坐标代表不同免疫细胞,纵坐标代表免疫细胞比例
图3 加权基因共表达网络分析注:A:基因共表达网络分层聚类树与共表达模块;B:M2巨噬细胞相关的模块特征,每个模块中上面的数值为模块与M2巨噬细胞之间的相关性值,下面括号中的数值为P
表1 38个核心基因
表2 核心基因的GO富集分析及KEEG通路分析结果
图4 潜在关键基因的确定及表达注:A:差异表达基因和核心基因的韦恩图;B:9个潜在关键基因在GSE104948中的表达情况,横坐标代表不同的基因,纵坐标代表基因相对表达量
图5 9个潜在关键基因在GSE108109中的表达注:横坐标代表不同的基因,纵坐标代表基因相对表达量
图6 6个关键基因的ROC曲线
表3 关键基因的基因集富集分析结果
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