目的:分析长链非编码RNA LINC01106在胶质瘤组织以及细胞中的表达水平,探索LINC01106抑制胶质瘤细胞增殖与侵袭能力的潜在作用机制。方法:通过肿瘤基因组图谱(The Cancer Genome Atlas,TCGA)数据库分析LINC01106在胶质瘤中的表达;采用...目的:分析长链非编码RNA LINC01106在胶质瘤组织以及细胞中的表达水平,探索LINC01106抑制胶质瘤细胞增殖与侵袭能力的潜在作用机制。方法:通过肿瘤基因组图谱(The Cancer Genome Atlas,TCGA)数据库分析LINC01106在胶质瘤中的表达;采用实时荧光定量PCR(q RT-PCR)法检测胶质瘤细胞系中LINC01106的表达水平。通过转染LINC01106小干扰RNA或者过表达质粒抑制或增高胶质瘤细胞U87中LINC01106的表达水平后,采用CCK-8实验以及EdU实验检测细胞增殖能力,Transwell实验检测细胞侵袭能力。通过生物信息学以及体外细胞实验对LINC01106潜在的分子机制进行分析。结果:分析TCGA数据库发现LINC01106在胶质瘤肿瘤组织的表达显著降低,同时qRT-PCR结果显示,LINC01106在胶质瘤细胞系(LN229、LN308、U87以及U251)中的表达均显著低于正常对照细胞HEB;体外细胞实验表明,在U87细胞中抑制LINC01106的表达可以显著提高细胞的增殖与侵袭能力,而过表达LINC01106的效果相反。通过生物信息学分析和双荧光素酶报告基因实验发现LINC01106能够结合miR-3167并抑制其表达,而miR-3167可能靶向CBFA2T3,这可能是LINC01106胶质瘤进展的潜在机制。结论:LINC01106在胶质瘤组织中低表达,抑制LINC01106可促进胶质瘤细胞的增殖与侵袭能力,LINC01106可能通过与CBFA2T3竞争性结合miR-3167在胶质瘤中发挥其抑癌基因的作用。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
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.
