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1.重庆医科大学附属第三医院检验科,重庆 401120
2.重庆大学生物工程学院生物流变科学与技术教育部重点实验室,重庆 400044
李 燕,Email:yanli@hospital.cqmu.edu.cn,研究方向:肿瘤诊断标志物,外泌体,非编码RNA。
邓 昆,Email:dengkun@hospital.cqmu.edu.cn。
收稿:2023-11-03,
修回:2024-03-16,
录用:2024-03-19,
纸质出版:2025-09-28
移动端阅览
李燕,杨柳,张勇,等.循环外泌体源性微RNA用于胃癌早期诊断的筛选和鉴定[J].重庆医科大学学报,2025,50(9):1236-1241.
Li Yan,Yang Liu,Zhang Yong,et al.Identification and validation of circulating exosome-derived microRNAs for the early diagnosis of gastric cancer[J].Journal of Chongqing Medical University,2025,50(9):1236-1241.
李燕,杨柳,张勇,等.循环外泌体源性微RNA用于胃癌早期诊断的筛选和鉴定[J].重庆医科大学学报,2025,50(9):1236-1241. DOI: 10.13406/j.cnki.cyxb.003782.
Li Yan,Yang Liu,Zhang Yong,et al.Identification and validation of circulating exosome-derived microRNAs for the early diagnosis of gastric cancer[J].Journal of Chongqing Medical University,2025,50(9):1236-1241. DOI: 10.13406/j.cnki.cyxb.003782.
目的
2
通过筛查外周血中肿瘤特异性来源的外泌体中的微RNA,建立一种新的胃癌早期诊断方法。
方法
2
从基因表达综合数据库中下载胃癌外泌体数据集GSE148334和GSE130654,以logFC
>
1或logFC
<
-1,
P
<
0.05为标准筛选差异RNAs;通过TargetScan和ENCORI数据库预测mRNA-miRNA-lncRNA之间的调控关系,用Cytoscape软件绘制ceRNA网络并筛选Hub基因进行验证。纳入27例早期胃癌患者、25例健康对照和25例其他癌症患者为研究对象,通过超速离心法分离血清外泌体。提取血清和外泌体样本中的RNA进行实时荧光定量聚合酶链式反应(real-time quantitative polymerase chain reaction,RT-qPCR)试验,分析Hub基因在各组的表达情况。
结果
2
通过生物信息学方法筛选出3个Hub基因
hsa-miR-105-5p、hsa-miR-219b-3p
和
hsa-miR-889-3p
,RT-qPCR结果显示
hsa-miR-219b-3p
在胃癌组血清和外泌体样本中的表达均明显高于健康对照组和其他癌组(血清:4.050±2.697,1.357±0.857,1.934±2.434;外泌体:2.525±1.518,0.774±0.559,1.259±2.127),差异有统计学意义(
P
<
0.05),而
hsa-miR-105-5p
和
hsa-miR-889-3p
在胃癌组和其他两组之间表达差异无统计学意义(
P
>
0.05)。外泌体hsa-miR-219b-3p的受试者工作特征曲线下面积为0.896(95%CI=0.800~0.993),明显优于传统肿瘤标志物癌胚抗原(
P
=0.015)、糖类抗原19-9(
P
=0.021)和糖类抗原72-4(
P
=0.005),所以外泌体hsa-miR-219b-3p在胃癌患者中具有更优的诊断效能。
结论
2
血清外泌体来源的hsa-miR-219b-3p有作为早期胃癌诊断标志物的潜力。
Objective
2
To establish a novel method for the early diagnosis of gastric cancer(GC) by screening for the microRNAs within tumor-specific exosomes in peripheral blood.
Methods
2
The gene expression omnibus database was used to download the GSE148334 and GSE130654 datasets of GC exosomes,and differentially expressed RNAs were obtained according to logFC
>
1 or logFC
<
-1 and
P
<
0.05. TargetScan and ENCORI databases
were used to predict the regulatory relationship between mRNA,miRNA,and lncRNA,and Cytoscape software was used to construct a ceRNA network and identify hub genes for validation. A total of 27 patients with early-stage GC,25 healthy controls,and 25 patients with other types of cancer were enrolled,and the ultracentrifugation method was used to isolate exosomes in serum. RT-qPCR was performed for RNA in serum and exosome samples to analyze the expression of hub genes in each group.
Results
2
Three hub genes were identified by the bioinformatics method,namely
hsa-miR-105-5p
,
hsa-miR-219b-3p
,and
hsa-miR-889-3p
,and RT-qPCR showed that the GC group had a significantly higher expression level of
hsa-miR-219b-3p
in serum and exosome samples than the healthy control group and the other cancer group(serum:4.050±2.697 vs. 1.357±0.857/1.934±2.434,
P
<
0.05;exosomes:2.525±1.518 vs. 0.774±0.559/1.259±2.127,
P
<
0.05),while there were no significant differences in the expression levels of
hsa-miR-889-3p
and
hsa-miR-105-5p
between the GC group and the other two groups(
P
>
0.05). The receiver operating characteristic(ROC) curve showed that hsa-miR-219b-3p in serum-derived exosomes had an area under the ROC curve of 0.896(95%CI=0.800-0.993),which was significantly better than the traditional tumor markers of carcinoembryonic antigen (
P
=0.015),CA19-9(
P
=0.021),and CA72-4(
P
=0.005),and therefore,exosomal hsa-miR-219b-3p showed a better diagnostic efficacy in GC patients.
Conclusion
2
This study shows that hsa-miR-219b-3p in serum-derived exosomes can be used as a potential marker for the early diagnosis of GC in clinical practice.
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