为探讨病毒如何利用宿主细胞自噬机制进行复制和传播提供研究模型,本研究利用CRISPR/Cas9系统构建ATG5基因敲除细胞系。首先针对非洲绿猴肾细胞(Vero)的ATG5基因设计靶向sgRNA序列,并将其连接到慢病毒载体中,包装得到重组慢病毒,用其感...为探讨病毒如何利用宿主细胞自噬机制进行复制和传播提供研究模型,本研究利用CRISPR/Cas9系统构建ATG5基因敲除细胞系。首先针对非洲绿猴肾细胞(Vero)的ATG5基因设计靶向sgRNA序列,并将其连接到慢病毒载体中,包装得到重组慢病毒,用其感染Vero-SN细胞,经过筛选得到ATG5基因敲除的亚克隆细胞系。利用TCID_(50)和Western-blot技术检测小反刍兽疫病毒(peste des petits ruminants virus,PPRV)分别在Vero-SN细胞和ATG5基因敲除细胞系中的复制能力。结果表明,本研究成功建立了VeroSN-ATG5KO细胞系,且抑制细胞自噬不利于病毒复制。该基因敲除细胞系的建立为后续探究病毒与自噬蛋白的相互作用及分子机制提供了试验材料。展开更多
Background:Long noncoding RNA,LINC01106 exhibits high expression in lung adenocarcinoma(LUAD)tumor tissues,but its functional role and regulatory mechanism in LUAD cells remain unclear.Methods:LINC01106 expression was...Background:Long noncoding RNA,LINC01106 exhibits high expression in lung adenocarcinoma(LUAD)tumor tissues,but its functional role and regulatory mechanism in LUAD cells remain unclear.Methods:LINC01106 expression was analyzed in LUAD tissues and its functional impact on LUAD cells was assessed.LUAD cells were silenced with sh-LINC01106 and injected into nude mice to investigate tumor growth.The downstream transcription factors and molecular mechanism were determined using the Human transcription factor database(TFDB)database and Gene Expression Profiling Interactive Analysis(GEPIA)database.Additionally,the impact of linc01106 on autophagy was analyzed by determining the expression of autophagy-related genes(ATGs)in LUAD cells.Results:Our results showed that LINC01106 exhibited upregulation in both LUAD tissues and cell lines.The silencing of LINC01106 demonstrated a suppressive effect on tumorigenesis in a xenograft mouse model of LUAD.Additionally,LINC01106 was found to recruit TATA-binding protein-associated factor 15(TAF15),an RNA-binding protein,thereby enhancing the mRNA stability of TEA domain transcription factor 4(TEAD4).In turn,TEAD4 served as a transcription factor that bound to the LINC01106 promoter and regulated its expression.Further assays indicated that LINC01106 promoted autophagy in LUAD cells by upregulating the expression of autophagy-related genes(ATGs).The silencing of LINC01106 in LUAD cells inhibited autophagy,and cell proliferation,and promoted apoptosis,which all were effectively reversed by ATG5 overexpression.Conclusions:Overall,LINC01106,transcriptionally activated by TEAD4,interacts with TAF15 to promote the stability of TEAD4 and upregulates the expression of ATGs,promoting malignancy of LUAD cells.展开更多
文摘为探讨病毒如何利用宿主细胞自噬机制进行复制和传播提供研究模型,本研究利用CRISPR/Cas9系统构建ATG5基因敲除细胞系。首先针对非洲绿猴肾细胞(Vero)的ATG5基因设计靶向sgRNA序列,并将其连接到慢病毒载体中,包装得到重组慢病毒,用其感染Vero-SN细胞,经过筛选得到ATG5基因敲除的亚克隆细胞系。利用TCID_(50)和Western-blot技术检测小反刍兽疫病毒(peste des petits ruminants virus,PPRV)分别在Vero-SN细胞和ATG5基因敲除细胞系中的复制能力。结果表明,本研究成功建立了VeroSN-ATG5KO细胞系,且抑制细胞自噬不利于病毒复制。该基因敲除细胞系的建立为后续探究病毒与自噬蛋白的相互作用及分子机制提供了试验材料。
基金supported by the 2022 Natural Science Foundation of Fujian Province(No.2022J011486).
文摘Background:Long noncoding RNA,LINC01106 exhibits high expression in lung adenocarcinoma(LUAD)tumor tissues,but its functional role and regulatory mechanism in LUAD cells remain unclear.Methods:LINC01106 expression was analyzed in LUAD tissues and its functional impact on LUAD cells was assessed.LUAD cells were silenced with sh-LINC01106 and injected into nude mice to investigate tumor growth.The downstream transcription factors and molecular mechanism were determined using the Human transcription factor database(TFDB)database and Gene Expression Profiling Interactive Analysis(GEPIA)database.Additionally,the impact of linc01106 on autophagy was analyzed by determining the expression of autophagy-related genes(ATGs)in LUAD cells.Results:Our results showed that LINC01106 exhibited upregulation in both LUAD tissues and cell lines.The silencing of LINC01106 demonstrated a suppressive effect on tumorigenesis in a xenograft mouse model of LUAD.Additionally,LINC01106 was found to recruit TATA-binding protein-associated factor 15(TAF15),an RNA-binding protein,thereby enhancing the mRNA stability of TEA domain transcription factor 4(TEAD4).In turn,TEAD4 served as a transcription factor that bound to the LINC01106 promoter and regulated its expression.Further assays indicated that LINC01106 promoted autophagy in LUAD cells by upregulating the expression of autophagy-related genes(ATGs).The silencing of LINC01106 in LUAD cells inhibited autophagy,and cell proliferation,and promoted apoptosis,which all were effectively reversed by ATG5 overexpression.Conclusions:Overall,LINC01106,transcriptionally activated by TEAD4,interacts with TAF15 to promote the stability of TEAD4 and upregulates the expression of ATGs,promoting malignancy of LUAD cells.
