Long noncoding RNA and microRNA are regulatory noncoding RNAs that are implicated in Alzheimer's disease, but the role of long noncoding RNA-associated competitive endogenous RNA has not been fully elucidated. The...Long noncoding RNA and microRNA are regulatory noncoding RNAs that are implicated in Alzheimer's disease, but the role of long noncoding RNA-associated competitive endogenous RNA has not been fully elucidated. The long noncoding RNA growth arrest-specific 5(GAS5) is a member of the 5′-terminal oligopyrimidine gene family that may be involved in neurological disorders, but its role in Alzheimer's disease remains unclear. This study aimed to investigate the function of GAS5 and construct a GAS5-associated competitive endogenous RNA network comprising potential targets. RNA sequencing results showed that GAS5 was upregulated in five familial Alzheimer's disease(5×FAD) mice, APPswe/PSEN1dE9(APP/PS1) mice, Alzheimer's disease-related APPswe cells, and serum from patients with Alzheimer's disease. Functional experiments with targeted overexpression and silencing demonstrated that GAS5 played a role in cognitive dysfunction and multiple Alzheimer's disease-associated pathologies, including tau hyperphosphorylation, amyloid-beta accumulation, and neuronal apoptosis. Mechanistic studies indicated that GAS5 acted as an endogenous sponge by competing for microRNA-23b-3p(miR-23b-3p) binding to regulate its targets glycogen synthase kinase 3beta(GSK-3β) and phosphatase and tensin homologue deleted on chromosome 10(PTEN) expression in an Argonaute 2-induced RNA silencing complex(RISC)-dependent manner. GAS5 inhibited miR-23b-3p-mediated GSK-3β and PTEN cascades with a feedforward PTEN/protein kinase B(Akt)/GSK-3β linkage. Furthermore, recovery of GAS5/miR-23b-3p/GSK-3β/PTEN pathways relieved Alzheimer's disease-like symptoms in vivo, indicated by the amelioration of spatial cognition, neuronal degeneration, amyloid-beta load, and tau phosphorylation. Together, these findings suggest that GAS5 promotes Alzheimer's disease pathogenesis. This study establishes the functional convergence of the GAS5/miR-23b-3p/GSK-3β/PTEN pathway on multiple pathologies, suggesting a candidate therapeutic target in Alzheimer's disease.展开更多
目的:评估急诊冠状动脉介入治疗术(PCI)后循环microRNA-26b-5p水平和血糖水平变化的趋势及相关性。方法:根据入选标准和排除标准,共入选接受急诊PCI术的急性前壁心肌梗死患者38例。详细记录临床相关资料,分别于术前、术后24h、术后72h...目的:评估急诊冠状动脉介入治疗术(PCI)后循环microRNA-26b-5p水平和血糖水平变化的趋势及相关性。方法:根据入选标准和排除标准,共入选接受急诊PCI术的急性前壁心肌梗死患者38例。详细记录临床相关资料,分别于术前、术后24h、术后72h行循环血microRNA-26b-5p和血糖水平检测。Real Time PCR法检测血液样本中microRNA-26b-5p表达量的变化。结果:对于成功行急诊PCI的急性心肌梗死患者,术后microRNA-26b-5p表达水平较术前明显升高(P<0.01),术后血糖水平逐渐下降(P<0.01),两者之间存在负相关(r=-0.332,P<0.01)。结论:急性心肌梗死患者往往存在应激性高血糖,microRNA-26b-5p可能参与血糖水平的相关。展开更多
目的探究LncRNA ZFAS1是否通过调节miR-34b-5p促进弥漫大B细胞淋巴瘤(diffuse large B lymphoma,DLBCL)细胞增殖并抑制细胞凋亡。方法实时荧光定量PCR(RT-qPCR)检测30例DLBCL患者肿瘤组织及DLBCL细胞株中LncRNA ZFAS1和miR-34b-5p转录...目的探究LncRNA ZFAS1是否通过调节miR-34b-5p促进弥漫大B细胞淋巴瘤(diffuse large B lymphoma,DLBCL)细胞增殖并抑制细胞凋亡。方法实时荧光定量PCR(RT-qPCR)检测30例DLBCL患者肿瘤组织及DLBCL细胞株中LncRNA ZFAS1和miR-34b-5p转录水平。将含有敲低ZFAS1序列的载体和抑制或过表达miR-34b-5p的序列使用Lipofectamine 2000试剂转染到SU-DHL-4细胞,RT-qPCR检测敲低和过表达效率,双荧光素酶报告基因实验分析ZFAS1和miR-34b-5p的靶向关系。最后SU-DHL-4细胞随机分组为对照组、sh-ZFAS1组、miR-34b-5p inhibitor组和shRNA-ZFAS1+miR-34b-5p inhibitor组,克隆形成实验和流式细胞术分别检测细胞增殖和凋亡;蛋白质印迹法检测凋亡相关蛋白的表达。结果在DLBCL患者和细胞系中ZFAS1的表达量增加,而miR-34b-5p的表达量减少,同时ZFAS1靶向负调节miR-34b-5p的表达。与对照组相比较,sh-ZFAS1组miR-34b-5p的表达量增加,miR-34b-5p inhibitor组miR-34b-5p的表达量减少。与miR-34b-5p inhibitor组相比较,sh-ZFAS1和miR-34b-5p inhibitor共转染组中miR-34b-5p的表达量增加。敲低ZFAS1的表达抑制SU-DHL-4细胞增殖,促进细胞凋亡,并降低线粒体膜电位,同时升高Bax/Bcl-2和cleaved caspase-3/caspase-3比值。结论LncRNA ZFAS1通过下调miR-34b-5p促进SU-DHL-4细胞增殖并抑制细胞凋亡。展开更多
基金supported by the National Natural Science Foundation of China,Nos. 82173806 and U1803281Chinese Academy of Medical Sciences (CAMS) Innovation Fund for Medical Science,Nos. 2021-I2M-1-030 and 2022-I2M-2-002Non-Profit Central Research Institute Fund of Chinese Academy of Medical Sciences,No. 2022-JKCS-08 (all to RL)。
文摘Long noncoding RNA and microRNA are regulatory noncoding RNAs that are implicated in Alzheimer's disease, but the role of long noncoding RNA-associated competitive endogenous RNA has not been fully elucidated. The long noncoding RNA growth arrest-specific 5(GAS5) is a member of the 5′-terminal oligopyrimidine gene family that may be involved in neurological disorders, but its role in Alzheimer's disease remains unclear. This study aimed to investigate the function of GAS5 and construct a GAS5-associated competitive endogenous RNA network comprising potential targets. RNA sequencing results showed that GAS5 was upregulated in five familial Alzheimer's disease(5×FAD) mice, APPswe/PSEN1dE9(APP/PS1) mice, Alzheimer's disease-related APPswe cells, and serum from patients with Alzheimer's disease. Functional experiments with targeted overexpression and silencing demonstrated that GAS5 played a role in cognitive dysfunction and multiple Alzheimer's disease-associated pathologies, including tau hyperphosphorylation, amyloid-beta accumulation, and neuronal apoptosis. Mechanistic studies indicated that GAS5 acted as an endogenous sponge by competing for microRNA-23b-3p(miR-23b-3p) binding to regulate its targets glycogen synthase kinase 3beta(GSK-3β) and phosphatase and tensin homologue deleted on chromosome 10(PTEN) expression in an Argonaute 2-induced RNA silencing complex(RISC)-dependent manner. GAS5 inhibited miR-23b-3p-mediated GSK-3β and PTEN cascades with a feedforward PTEN/protein kinase B(Akt)/GSK-3β linkage. Furthermore, recovery of GAS5/miR-23b-3p/GSK-3β/PTEN pathways relieved Alzheimer's disease-like symptoms in vivo, indicated by the amelioration of spatial cognition, neuronal degeneration, amyloid-beta load, and tau phosphorylation. Together, these findings suggest that GAS5 promotes Alzheimer's disease pathogenesis. This study establishes the functional convergence of the GAS5/miR-23b-3p/GSK-3β/PTEN pathway on multiple pathologies, suggesting a candidate therapeutic target in Alzheimer's disease.
文摘目的:评估急诊冠状动脉介入治疗术(PCI)后循环microRNA-26b-5p水平和血糖水平变化的趋势及相关性。方法:根据入选标准和排除标准,共入选接受急诊PCI术的急性前壁心肌梗死患者38例。详细记录临床相关资料,分别于术前、术后24h、术后72h行循环血microRNA-26b-5p和血糖水平检测。Real Time PCR法检测血液样本中microRNA-26b-5p表达量的变化。结果:对于成功行急诊PCI的急性心肌梗死患者,术后microRNA-26b-5p表达水平较术前明显升高(P<0.01),术后血糖水平逐渐下降(P<0.01),两者之间存在负相关(r=-0.332,P<0.01)。结论:急性心肌梗死患者往往存在应激性高血糖,microRNA-26b-5p可能参与血糖水平的相关。
