目的探究粒细胞集落刺激因子(granulocyte colony-stimulating factor,G-CSF)通过多个C2结构域和跨膜区蛋白1反义RNA1(MCTP1 antisense RNA 1,MCTP1-AS1)/SMAD家族成员7(SMAD family member 7,SMAD7)表观遗传调控途径抑制上皮间质化转变...目的探究粒细胞集落刺激因子(granulocyte colony-stimulating factor,G-CSF)通过多个C2结构域和跨膜区蛋白1反义RNA1(MCTP1 antisense RNA 1,MCTP1-AS1)/SMAD家族成员7(SMAD family member 7,SMAD7)表观遗传调控途径抑制上皮间质化转变(epithelial-mesenchymal transition,EMT)促进子宫内膜修复,并探讨其可能的潜在作用机理。方法通过qRT-PCR检测人宫颈内膜细胞H8细胞中G-CSF、E-钙黏蛋白(E-cadherin)、紧密连接蛋白Z0-1、N-钙黏蛋白(N-cadherin)、波形蛋白(Vimentin)、SMAD7以及MCTP1-AS1的表达水平。MCTP1-AS1与G-CSF的相互作用采用双荧光素酶报告基因实验验证。结果G-CSF过表达可能抑制N-cadherin和Vimentin的表达,促进E-cadherin和Z0-1的表达(P<0.05);而在沉默G-CSF后可能促进了N-cadherin和Vimentin的表达,抑制E-cadherin和Z0-1的表达(P<0.05)。G-CSF靶向MCTP1-AS1。过表达的G-CSF可以抑制MCTP1-AS1和SMAD7的表达;相反,当G-CSF被敲除时,MCTP1-AS1和SMAD7的表达水平明显上调。结论通过细胞实验证实了G-CSF可能通过MCTP1-AS1/SMAD7表观遗传调控途径抑制上皮间质化转变促进子宫内膜修复,同时表明G-CSF可能是用于治疗薄型子宫的一个新靶点。展开更多
Background:MicroRNAs(miRNAs)are endogenous non-coding RNAS that regulate gene expression at the post-transcriptional level and are key modulators in neurodegenerative diseases.Overexpressed miRNAs play an important ro...Background:MicroRNAs(miRNAs)are endogenous non-coding RNAS that regulate gene expression at the post-transcriptional level and are key modulators in neurodegenerative diseases.Overexpressed miRNAs play an important role in amyotrophic lateral sclerosis(ALS);however,the pathogenic mechanisms of deregulated miRNAS are still unclear.Methods:We aimed to assess the dysfunction of RNAS or miRNAs in fALS(SOD1 mutations).We compared the RNA-seq of subcellular fractions in NSC-34 WT(hSOD1)and MT(hSOD1(G93A))cells to find altered RNAs or miRNAs.We identified that Hif1a and Mef2c were upregulated,and Mctp1 and Rarb were downregulated in the cytoplasm of NSC-34 MT cells.Results:SOD1 mutations decreased the level of miR-18b-5p.Induced Hif1a which is the target for miR-18b increased Mef2c expression as a transcription factor.Mef2c upregulated miR-206 as a transcription factor.Inhibition of Mctp1 and Rarb,which are targets of miR-206,induced intracellular Ca^2+ levels and reduced cell differentiation,respectively.The miR-18b-5p pathway was also observed in G93A Tg mice,fALS(G86S)patient,and iPSC-derived motor neurons from fALS(G17S)patient.Conclusions:Our data indicate that SOD1 mutation decreases miR-18b-5p,which sequentially regulates Hif1a,Mef2c,miR-206,Mctp1 and Rarb in fALS-linked SOD1 mutation.These results provide new insights into the downregulation of miR-18b-5p-dependent pathogenic mechanisms of ALS.展开更多
文摘目的探究粒细胞集落刺激因子(granulocyte colony-stimulating factor,G-CSF)通过多个C2结构域和跨膜区蛋白1反义RNA1(MCTP1 antisense RNA 1,MCTP1-AS1)/SMAD家族成员7(SMAD family member 7,SMAD7)表观遗传调控途径抑制上皮间质化转变(epithelial-mesenchymal transition,EMT)促进子宫内膜修复,并探讨其可能的潜在作用机理。方法通过qRT-PCR检测人宫颈内膜细胞H8细胞中G-CSF、E-钙黏蛋白(E-cadherin)、紧密连接蛋白Z0-1、N-钙黏蛋白(N-cadherin)、波形蛋白(Vimentin)、SMAD7以及MCTP1-AS1的表达水平。MCTP1-AS1与G-CSF的相互作用采用双荧光素酶报告基因实验验证。结果G-CSF过表达可能抑制N-cadherin和Vimentin的表达,促进E-cadherin和Z0-1的表达(P<0.05);而在沉默G-CSF后可能促进了N-cadherin和Vimentin的表达,抑制E-cadherin和Z0-1的表达(P<0.05)。G-CSF靶向MCTP1-AS1。过表达的G-CSF可以抑制MCTP1-AS1和SMAD7的表达;相反,当G-CSF被敲除时,MCTP1-AS1和SMAD7的表达水平明显上调。结论通过细胞实验证实了G-CSF可能通过MCTP1-AS1/SMAD7表观遗传调控途径抑制上皮间质化转变促进子宫内膜修复,同时表明G-CSF可能是用于治疗薄型子宫的一个新靶点。
基金This research was supported by the Brain Research Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Science and ICT(2017M3C7A102536521 and 2018R1A5A202596413).
文摘Background:MicroRNAs(miRNAs)are endogenous non-coding RNAS that regulate gene expression at the post-transcriptional level and are key modulators in neurodegenerative diseases.Overexpressed miRNAs play an important role in amyotrophic lateral sclerosis(ALS);however,the pathogenic mechanisms of deregulated miRNAS are still unclear.Methods:We aimed to assess the dysfunction of RNAS or miRNAs in fALS(SOD1 mutations).We compared the RNA-seq of subcellular fractions in NSC-34 WT(hSOD1)and MT(hSOD1(G93A))cells to find altered RNAs or miRNAs.We identified that Hif1a and Mef2c were upregulated,and Mctp1 and Rarb were downregulated in the cytoplasm of NSC-34 MT cells.Results:SOD1 mutations decreased the level of miR-18b-5p.Induced Hif1a which is the target for miR-18b increased Mef2c expression as a transcription factor.Mef2c upregulated miR-206 as a transcription factor.Inhibition of Mctp1 and Rarb,which are targets of miR-206,induced intracellular Ca^2+ levels and reduced cell differentiation,respectively.The miR-18b-5p pathway was also observed in G93A Tg mice,fALS(G86S)patient,and iPSC-derived motor neurons from fALS(G17S)patient.Conclusions:Our data indicate that SOD1 mutation decreases miR-18b-5p,which sequentially regulates Hif1a,Mef2c,miR-206,Mctp1 and Rarb in fALS-linked SOD1 mutation.These results provide new insights into the downregulation of miR-18b-5p-dependent pathogenic mechanisms of ALS.
