目的通过生物信息学分析探究m6A甲基化调节因子在肺腺癌中的表达及预后。方法通过TCGA数据库下载516例肺腺癌患者的转录组数据及其临床数据,使用R软件分析比较肺腺癌组织和癌旁组织中20个m6A甲基化调节因子的表达差异,并通过单变量Cox...目的通过生物信息学分析探究m6A甲基化调节因子在肺腺癌中的表达及预后。方法通过TCGA数据库下载516例肺腺癌患者的转录组数据及其临床数据,使用R软件分析比较肺腺癌组织和癌旁组织中20个m6A甲基化调节因子的表达差异,并通过单变量Cox回归分析进行生存分析。通过Consensus Cluster Plus R非监督类的方法进行m6A聚类生存分析。结果16个m6A甲基化调节因子在肺腺癌中差异表达,其中有5个m6A甲基化调节因子(IGF2BP1、IGF2BP3、HNRNPC、RBMX、YTHDC2)与肿瘤分期、7个m6A甲基化调节因子(IGF2BP1、IGF2BP3、HNRNPC、RBMX、METTL3、YTHDF2、METTL14)与T期和2个m6A甲基化调节因子(IGF2BP3、YTHDC2)与N期显著相关。Cox回归分析结果表明6个m6A甲基化调节因子(IGF2BP1、IGF2BP2、IGF2BP3、HNRNPA2B1、HNRNPC、RBM15)是影响肺腺癌患者预后的独立危险因素。结论m6A甲基化调节因子与肺腺癌进展有关,6个m6A甲基化调节因子可以作为预测肺腺癌患者预后的潜在生物标志物。展开更多
目的探究m6A甲基化甲基转移酶RNA结合蛋白15(RNA-binding Motif Protein 15,RBM15)与宫颈癌的相关性及临床意义。方法选取2011年1月1日至2018年1月1日期间于皖南医学院第一附属医院进行诊治的宫颈癌病例132例,另选20例正常宫颈组织病例...目的探究m6A甲基化甲基转移酶RNA结合蛋白15(RNA-binding Motif Protein 15,RBM15)与宫颈癌的相关性及临床意义。方法选取2011年1月1日至2018年1月1日期间于皖南医学院第一附属医院进行诊治的宫颈癌病例132例,另选20例正常宫颈组织病例作为对照,共152例,通过免疫组化法检测RBM15在宫颈癌中和正常宫颈中的表达水平,分析其相关性,并研究其表达量与临床分期及临床病理特征之间的关系。结果RBM15在宫颈癌中的阳性表达率56%显著高于正常宫颈0%(P=0.001),且宫颈癌的期别越高,RBM15表达越强(P=0.002)。复发宫颈癌中RBM15的表达也呈现为随期别逐渐上升的趋势(P=0.156)。RBM15的阳性表达与宫颈癌的肿瘤最大径、淋巴结转移、神经侵犯、脉管癌栓有关(P<0.05),而与肿瘤分级、病理类型、发病年龄、鳞状上皮细胞癌抗原(Squamous cell carcinoma antigen,SCCA)无关(P>0.05)。结论RBM15在宫颈癌中呈高表达,且与宫颈癌分期及临床病理特征具有一定的相关性,RBM15表达升高也会造成宫颈癌患者预后不良,这一发现日后有望成为宫颈癌诊治的新靶点。展开更多
In eukaryotic organisms,the most common internal modification of messenger RNA(m RNA)is N6-methyladenosine(m6A).This modification can be dynamically and reversibly controlled by specific enzymes known as m6A writers a...In eukaryotic organisms,the most common internal modification of messenger RNA(m RNA)is N6-methyladenosine(m6A).This modification can be dynamically and reversibly controlled by specific enzymes known as m6A writers and erasers.The fat-mass and obesity-associated protein(FTO)catalyzes RNA demethylation and plays a critical role in various physiological and pathological processes.Our research identified dynamic alterations in both m6A and FTO during the assembly of primordial follicles,with an inverse relationship observed for m6A levels and nuclear-localized FTO expression.Application of Fto small interfering RNA(si RNA)altered the expression of genes related to cell proliferation,hormone regulation,and cell chemotaxis,and affected RNA alternative splicing.Overexpression of the full-length Fto gene led to changes in m6A levels,alternative splicing of Cdk5,cell proliferation,cell cycle progression,and proportion of primordial follicles.Conversely,overexpression of Fto lacking a nuclear localization signal(NLS)did not significantly alter m6A levels or primordial follicle assembly.These findings suggest that FTO,localized in the nucleus but not in the cytoplasm,regulates RNA m6A demethylation and plays a role in cell proliferation,cell cycle progression,and primordial follicle assembly.These results highlight the potential of m6A and its eraser FTO as possible biomarkers and therapeutic targets.展开更多
BACKGROUND Both N6-methyladenosine(m6A)methylation and autophagy are considered relevant to the pathogenesis of ulcerative colitis(UC).However,a systematic exploration of the role of the com-bination of m6A methylatio...BACKGROUND Both N6-methyladenosine(m6A)methylation and autophagy are considered relevant to the pathogenesis of ulcerative colitis(UC).However,a systematic exploration of the role of the com-bination of m6A methylation and autophagy in UC remains to be performed.AIM To elucidate the autophagy-related genes of m6A with a diagnostic value for UC.METHODS The correlation between m6A-related genes and autophagy-related genes(ARGs)was analyzed.Finally,gene set enrichment analysis(GSEA)was performed on the characteristic genes.Additionally,the expression levels of four characteristic genes were verified in dextran sulfate sodium(DSS)-induced colitis in mice.RESULTS GSEA indicated that BAG3,P4HB and TP53INP2 were involved in the inflammatory response and TNF-αsignalling via nuclear factor kappa-B.Furthermore,polymerase chain reaction results showed significantly higher mRNA levels of BAG3 and P4HB and lower mRNA levels of FMR1 and TP53INP2 in the DSS group compared to the control group.CONCLUSION This study identified four m6A-ARGs that predict the occurrence of UC,thus providing a scientific reference for further studies on the pathogenesis of UC.展开更多
文摘目的通过生物信息学分析探究m6A甲基化调节因子在肺腺癌中的表达及预后。方法通过TCGA数据库下载516例肺腺癌患者的转录组数据及其临床数据,使用R软件分析比较肺腺癌组织和癌旁组织中20个m6A甲基化调节因子的表达差异,并通过单变量Cox回归分析进行生存分析。通过Consensus Cluster Plus R非监督类的方法进行m6A聚类生存分析。结果16个m6A甲基化调节因子在肺腺癌中差异表达,其中有5个m6A甲基化调节因子(IGF2BP1、IGF2BP3、HNRNPC、RBMX、YTHDC2)与肿瘤分期、7个m6A甲基化调节因子(IGF2BP1、IGF2BP3、HNRNPC、RBMX、METTL3、YTHDF2、METTL14)与T期和2个m6A甲基化调节因子(IGF2BP3、YTHDC2)与N期显著相关。Cox回归分析结果表明6个m6A甲基化调节因子(IGF2BP1、IGF2BP2、IGF2BP3、HNRNPA2B1、HNRNPC、RBM15)是影响肺腺癌患者预后的独立危险因素。结论m6A甲基化调节因子与肺腺癌进展有关,6个m6A甲基化调节因子可以作为预测肺腺癌患者预后的潜在生物标志物。
基金supported by the Natural Science Foundation of Shandong Province,China (ZR2017MC033)National Key Research and Development Program of China (2023YFD1300504)Taishan Scholar Construction Foundation of Shandong Province,China (ts20190946)。
文摘In eukaryotic organisms,the most common internal modification of messenger RNA(m RNA)is N6-methyladenosine(m6A).This modification can be dynamically and reversibly controlled by specific enzymes known as m6A writers and erasers.The fat-mass and obesity-associated protein(FTO)catalyzes RNA demethylation and plays a critical role in various physiological and pathological processes.Our research identified dynamic alterations in both m6A and FTO during the assembly of primordial follicles,with an inverse relationship observed for m6A levels and nuclear-localized FTO expression.Application of Fto small interfering RNA(si RNA)altered the expression of genes related to cell proliferation,hormone regulation,and cell chemotaxis,and affected RNA alternative splicing.Overexpression of the full-length Fto gene led to changes in m6A levels,alternative splicing of Cdk5,cell proliferation,cell cycle progression,and proportion of primordial follicles.Conversely,overexpression of Fto lacking a nuclear localization signal(NLS)did not significantly alter m6A levels or primordial follicle assembly.These findings suggest that FTO,localized in the nucleus but not in the cytoplasm,regulates RNA m6A demethylation and plays a role in cell proliferation,cell cycle progression,and primordial follicle assembly.These results highlight the potential of m6A and its eraser FTO as possible biomarkers and therapeutic targets.
文摘BACKGROUND Both N6-methyladenosine(m6A)methylation and autophagy are considered relevant to the pathogenesis of ulcerative colitis(UC).However,a systematic exploration of the role of the com-bination of m6A methylation and autophagy in UC remains to be performed.AIM To elucidate the autophagy-related genes of m6A with a diagnostic value for UC.METHODS The correlation between m6A-related genes and autophagy-related genes(ARGs)was analyzed.Finally,gene set enrichment analysis(GSEA)was performed on the characteristic genes.Additionally,the expression levels of four characteristic genes were verified in dextran sulfate sodium(DSS)-induced colitis in mice.RESULTS GSEA indicated that BAG3,P4HB and TP53INP2 were involved in the inflammatory response and TNF-αsignalling via nuclear factor kappa-B.Furthermore,polymerase chain reaction results showed significantly higher mRNA levels of BAG3 and P4HB and lower mRNA levels of FMR1 and TP53INP2 in the DSS group compared to the control group.CONCLUSION This study identified four m6A-ARGs that predict the occurrence of UC,thus providing a scientific reference for further studies on the pathogenesis of UC.