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
目的探讨催产素(oxytocin,OXT)对卵巢癌细胞增殖与凋亡的影响及其作用机制。方法人卵巢癌细胞系SKOV3和A2780细胞来源于美国模式培养物保藏所(ATCC)。OXT和OXT受体(oxytocin receptor,OXTR)拮抗剂Atosiban刺激卵巢癌细胞,改变细胞中miR-...目的探讨催产素(oxytocin,OXT)对卵巢癌细胞增殖与凋亡的影响及其作用机制。方法人卵巢癌细胞系SKOV3和A2780细胞来源于美国模式培养物保藏所(ATCC)。OXT和OXT受体(oxytocin receptor,OXTR)拮抗剂Atosiban刺激卵巢癌细胞,改变细胞中miR-196b-3p的水平,使用MTT法、ELISA试验、Western blot、生物信息学工具及荧光素酶报告基因实验等研究以上处理对卵巢癌细胞增殖与凋亡的作用和机制。结果OXT刺激SKOV3细胞OXTR激活(F=28.842,P<0.05),增殖活性降低(F=12.988,P<0.05),Caspase3活性增加(F=26.676,P<0.05);Ki67、增殖细胞核抗原(proliferating cell nuclear antigen,PCNA)及p53凋亡刺激蛋白抑制剂(inhibitor of apoptosis-stimulating of p53 protein,iASPP)表达下调,p53凋亡刺激蛋白(apoptosis-stimulating of p53 protein,ASPP)1(ASPP1)及2(ASPP2)表达上调;但Atosiban部分逆转OXT的效果。OXT刺激卵巢癌细胞miR-196b-3p水平减少(A2780:F=76.406,P<0.05;SKOV3:F=45.874,P<0.05)。miR-196b-3p-mimic转染联合OXT刺激,导致细胞增殖活性增加(F=9.232,P<0.05),Caspase3活性降低(F=36.350,P<0.05),同时ASPP2表达降低(F=83.013,P<0.05)。而miR-196b-3p-inhibitor转染联合OXT刺激,ASPP2表达增加(F=83.013,P<0.05)。生物信息学工具预测联合荧光素酶报告基因实验确认ASPP2是miR-196b-3p的靶基因。结论OXT介导的OXTR激活通过调节miR-196b-3p/ASPP2信号通路调节卵巢癌细胞生长。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.
文摘目的探讨催产素(oxytocin,OXT)对卵巢癌细胞增殖与凋亡的影响及其作用机制。方法人卵巢癌细胞系SKOV3和A2780细胞来源于美国模式培养物保藏所(ATCC)。OXT和OXT受体(oxytocin receptor,OXTR)拮抗剂Atosiban刺激卵巢癌细胞,改变细胞中miR-196b-3p的水平,使用MTT法、ELISA试验、Western blot、生物信息学工具及荧光素酶报告基因实验等研究以上处理对卵巢癌细胞增殖与凋亡的作用和机制。结果OXT刺激SKOV3细胞OXTR激活(F=28.842,P<0.05),增殖活性降低(F=12.988,P<0.05),Caspase3活性增加(F=26.676,P<0.05);Ki67、增殖细胞核抗原(proliferating cell nuclear antigen,PCNA)及p53凋亡刺激蛋白抑制剂(inhibitor of apoptosis-stimulating of p53 protein,iASPP)表达下调,p53凋亡刺激蛋白(apoptosis-stimulating of p53 protein,ASPP)1(ASPP1)及2(ASPP2)表达上调;但Atosiban部分逆转OXT的效果。OXT刺激卵巢癌细胞miR-196b-3p水平减少(A2780:F=76.406,P<0.05;SKOV3:F=45.874,P<0.05)。miR-196b-3p-mimic转染联合OXT刺激,导致细胞增殖活性增加(F=9.232,P<0.05),Caspase3活性降低(F=36.350,P<0.05),同时ASPP2表达降低(F=83.013,P<0.05)。而miR-196b-3p-inhibitor转染联合OXT刺激,ASPP2表达增加(F=83.013,P<0.05)。生物信息学工具预测联合荧光素酶报告基因实验确认ASPP2是miR-196b-3p的靶基因。结论OXT介导的OXTR激活通过调节miR-196b-3p/ASPP2信号通路调节卵巢癌细胞生长。
