【摘要】 目的：探究hsa-miR-204-5p对人血管内皮细胞活力、迁移、周期及凋亡等生物学行为的影响。方法：使用人脐静脉内皮细胞株EA. hy926构建过表达hsa-miR-204-5p(hsa-miR-204-5p mimics)模型。通过细胞划痕、Transwell、CCK-8、细胞周期和凋亡率等指标评估hsa-miR-204-5p对内皮细胞功能状态的影响。接着，使用RNA测序和RT-qPCR寻找并验证hsa-miR-204-5p的下游靶基因，将RNA测序中log2FC≤-0.5、P<0.05的基因和miRWalk数据库预测的hsa-miR-204-5p的下游靶基因取交集，并进行基因本体论(GO)和京都基因与基因组百科全书(KEGG)富集分析。结果：过表达hsa-miR-204-5p可以抑制EA. hy926细胞的活力和迁移能力，降低EA. hy926细胞的凋亡率，并使聚集在S期的细胞减少。富集分析结果发现hsa-miR-204-5p下游靶基因富集在MAPK信号通路，富集在此通路的基因为MAPT、PPP3R1、PRKACB、PTPRR、MAP2K4、CACNA2D2和RPS6KA6。RT-qPCR结果显示，过表达hsa-miR-204-5p后，MAPT和MAP2K4扩增结果较好且表达为下调。其中，MAPT下降趋势最明显。结论：hsamiR-204-5p可能通过抑制MAPT/MAPK信号通路而影响内皮细胞的活力、迁移和凋亡等生物学行为。更多还原

【Abstract】 AIM:This study aimed to investigate the effects of hsa-miR-204-5p on the viability,migration,cell cycle,and apoptosis of human vascular endothelial cells.METHODS:We established a model using the hsa-miR-204-5p mimic in the human umbilical vein endothelial cell line EA.hy926.We evaluated the effects of hsa-miR-204-5p on endothelial cell functionality through various analyses,including cell scratch,Transwell,CCK-8,cell cycle,and apoptosis assays.Subsequently,we employed RNA sequencing and RT-qPCR to predict and verify the downstream target genes of hsa-miR-204-5p.Genes meeting the criteria of log2FC≤-0.5 and P<0.05 in RNA sequencing and those predicted as downstream target genes of hsa-miR-204-5p by the miRWalk database were intersected.Furthermore,we conducted Gene Ontology(GO) and Kyoto Encyclopedia of Genes and Genomes(KEGG) enrichment analyses.RESULTS:Overexpression of hsa-miR-204-5p inhibited the viability and migration of EA.hy926 cells,and reduced their apoptotic rate and the proportion of cells in S phase.Enrichment analyses showed that downstream target genes of hsa-miR-204-5p,including MAPT,PPP3R1,PRKACB,PTPRR,MAP2K4,CACNA2D2 and RPS6KA6,exhibited enrichment in MAPK signaling pathway.RT-qPCR results revealed that the mRNA expression levels of MAPT and MAP2K4,especially MAPT,were significantly down-regulated after overexpression of hsa-miR-204-5p.CONCLUSION:The findings suggest that hsa-miR-204-5p suppresses the biological behaviors of endothelial cells,such as viability,migration,and apoptosis,likely through the inhibition of MAPT/MAPK signaling pathway.更多还原