肥胖相关基因Stambpl1的生物信息学筛选及其对脂代谢影响的初步探究
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南京医科大学罕见代谢性疾病研究重点实验室,生物化学与分子生物学系,江苏省代谢性疾病分子靶标与干预重点实验室,江苏 南京 211166

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R589.2

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国家自然科学基金(92357307,32130050,32201064);江苏省高等学校基础科学(自然科学)研究(23KJB310005)


Bioinformatics screening of obesity ⁃ related gene Stambpl1 and preliminary study of its effects on lipid metabolism
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Key Laboratory of Rare Metabolic Disease,Department of Molecular Biology and Biochemistry,Nanjing MedicalUniversity,Jiangsu Provincial Key Laboratory of Molecular Targets and Intervention for Metabolic Diseases,Nanjing 211166 ,China

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    摘要:

    目的:利用生物信息学方法筛选肥胖相关基因,并初步探究其对脂肪细胞脂代谢的影响。方法:从基因表达综合数据库(Gene Expression Omnibus,GEO)中获取 C57BL6/J 小鼠白色脂肪组织(white adipose tissue,WAT)数据集 GSE30247、 GSE37218和GSE138632。将普通饮食喂养的小鼠转录组数据设为对照组,高脂饮食(high fat diet,HFD)喂养的小鼠转录组数据设为实验组,使用NCBI官方的GEO2R工具分别筛选GSE37218和GSE30247在HFD后的差异基因,以P < 0.05,log2FC > 1.5为筛选标准,获取二者的共同差异基因。对差异基因进行基因本体(gene ontology,GO)、哺乳动物表型本体(mammalian phenotype ontology, MP)和人类表型本体(human phenotype ontology,HPO)富集分析。采用 STRING 数据库构建蛋白质相互作用(protein-protein interaction,PPI)网络,使用Cytoscape筛选并获取核心基因(hub gene)。对GSE138632数据集中对照组和实验组数据进行差异分析并通过受试者工作特征(receiver operating characteristic,ROC)曲线进行基因预测诊断性分析,进一步验证hub gene。利用慢病毒构建STAM结合蛋白样1(STAM binding protein like 1,Stambpl1)稳定过表达的3T3-L1细胞系,使用油酸(oleic acid,OA) 诱导3T3-L1细胞中脂滴积累,通过BODIPY染色和甘油三酯含量检测判断脂滴累积情况。结果:对GSE37218和GSE30247数据集进行差异分析,发现HFD喂养后小鼠附睾脂肪组织(epididymal white adipose tissue,eWAT)中较普通饮食喂养小鼠eWAT 共同上调的基因57个;通过 Cytoscape中的多种算法分析进一步得到13个hub gene;使用GSE138632数据集验证这13个hub gene的表达,最终筛选出Stambpl1,RT-PCR实验结果显示Stambpl1在HFD诱导的肥胖小鼠脂肪组织表达升高;BODIPY染色和甘油三酯含量检测表明在3T3-L1细胞中过表达Stambpl1可缓解OA诱导的脂滴累积。结论:本研究利用生物信息学技术筛选得到肥胖相关基因Stambpl1,并初步证实Stambpl1会在体外抑制脂肪细胞的脂质积累。

    Abstract:

    Objective:Bioinformatics methods were used to screen obesity - related genes and preliminarily explore their effects on adipocyte lipid metabolism. Methods:We obtained the C57BL6/J mouse white adipose tissue(WAT)datasets GSE30247,GSE37218, and GSE138632 from the Gene Expression Omnibus(GEO). The transcriptome data of mice fed with a normal diet in GSE37218 and GSE30247 were set as the control group,and the transcriptome data of mice fed with a high-fat diet(HFD)were set as the experimental group. The NCBI official GEO2R tool was used to screen the differential genes of the two datasets after HFD,and P < 0.05,log2FC>1.5 were used as the screening criteria to obtain the common differential genes of the two datasets. Perform gene ontology(GO),mammalian phenotype ontology(MP),and human phenotype ontology(HPO)enrichment analysis on differentially expressed genes. Construct protein - protein interaction(PPI)networks using STRING database,screen and obtain hub genes using Cytoscape. The transcriptome data of mice fed with normal diet in the GSE138632 dataset were set as the control group,and the transcriptome data of mice fed with HFD were set as the experimental group for differential analysis. Gene predictive diagnostic analysis was performed using receiver operating characteristic(ROC)curve to further validate hub genes. Using lentivirus to construct a stable overexpressed 3T3-L1 cell line with STAM binding protein like 1(Stambpl1),oleic acid(OA)was used to induce lipid droplet accumulation in 3T3-L1 cells.;BODIPY staining and triglyceride(TG)content detection were used to determine lipid droplet accumulation. Results:After performing differential analysis on the GSE37218 and GSE30247 datasets,we found 57 genes were commonly upregulated in the epididymal white adipose tissue(eWAT)of mice fed withHFD compared to those fed with normal diet. Further analysis using multiple algorithms in Cytoscape identified 13 hub genes. The expression of these 13 hub genes was validated using the GSE138632 dataset, leading to the screening of Stambpl1. RT -PCR results showed that Stambpl1 was upregulated in the adipose tissue of HFD -induced obese mice. BODIPY staining and TG content assays revealed that overexpression of Stambpl1 in 3T3-L1 cells alleviated OA-induced lipid droplet accumulation. Conclusion:This study used bioinformatics to screen the obesity-related gene Stambpl1,and preliminarily confirmed that Stambpl1 inhibits lipid accumulation in adipocytes in vitro.

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任钰,李超普,张许,季学涛,李仲.肥胖相关基因Stambpl1的生物信息学筛选及其对脂代谢影响的初步探究[J].南京医科大学学报(自然科学版),2025,45(10):1417-1426

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  • 收稿日期:2025-05-15
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  • 在线发布日期: 2025-10-16
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