BACKGROUND The pyruvate dehydrogenase E1 subunitβ(PDHB)gene which regulates energy metabolism is located in mitochondria.However,few studies have elucidated the role and mechanism of PDHB in different cancers.AIM To ...BACKGROUND The pyruvate dehydrogenase E1 subunitβ(PDHB)gene which regulates energy metabolism is located in mitochondria.However,few studies have elucidated the role and mechanism of PDHB in different cancers.AIM To comprehensive pan-cancer analysis of PDHB was performed based on bioinformatics approaches to explore its tumor diagnostic and prognostic value and tumor immune relevance in cancer.In vitro experiments were performed to examine the biological regulation of PDHB in liver cancer.METHODS Pan-cancer data related to PDHB were obtained from the Cancer Genome Atlas(TCGA)database.Analysis of the gene expression profiles of PDHB was based on TCGA and Genotype Tissue Expression Dataset databases.Cox regression analysis and Kaplan-Meier methods were used to assess the correlation between PDHB expression and survival prognosis in cancer patients.The correlation between PDHB and receiver operating characteristic diagnostic curve,clinicopathological staging,somatic mutation,tumor mutation burden(TMB),microsatellite instability(MSI),DNA methylation,and drug susceptibility in pan-cancer was also analyzed.Various algorithms were used to analyze the correlation between PDHB and immune cell infiltration and tumor chemotaxis environment,as well as the co-expression analysis of PDHB and immune checkpoint(ICP)genes.The expression and functional phenotype of PDHB in single tumor cells were studied by single-cell sequencing,and the functional enrichment analysis of PDHB-related genes was performed.The study also validated the level of mRNA or protein expression of PDHB in several cancers.Finally,in vitro experiments verified the regulatory effect of PDHB on the proliferation,migration,and invasion of liver cancer.RESULTS PDHB was significantly and differently expressed in most cancers.PDHB was significantly associated with prognosis in patients with a wide range of cancers,including kidney renal clear cell carcinoma,kidney renal papillary cell carcinoma,breast invasive carcinoma,and brain lower grade glioma.In some cancers,PDHB expression was clearly associated with gene mutations,clinicopathological stages,and expression of TMB,MSI,and ICP genes.The expression of PDHB was closely related to the infiltration of multiple immune cells in the immune microenvironment and the regulation of tumor chemotaxis environment.In addition,single-cell sequencing results showed that PDHB correlated with different biological phenotypes of multiple cancer single cells.This study further demonstrated that down-regulation of PDHB expression inhibited the proliferation,migration,and invasion functions of hepatoma cells.CONCLUSION As a member of pan-cancer,PDHB may be a novel cancer marker with potential value in diagnosing cancer,predicting prognosis,and in targeted therapy.展开更多
目的:确定前列腺癌中Sp1通过PKM2途径对前列腺癌细胞的增殖和代谢的作用。方法:前列腺癌细胞株DU145与PC3体外转染Sp1 si RNA与阴性对照无意义核苷酸序列(NC组),采用葡萄糖检测试剂盒与乳酸检测试剂盒检测转染后有氧糖酵解变化;CCK-8实...目的:确定前列腺癌中Sp1通过PKM2途径对前列腺癌细胞的增殖和代谢的作用。方法:前列腺癌细胞株DU145与PC3体外转染Sp1 si RNA与阴性对照无意义核苷酸序列(NC组),采用葡萄糖检测试剂盒与乳酸检测试剂盒检测转染后有氧糖酵解变化;CCK-8实验检测转染后的细胞增殖;q RT-PCR检测转染后PKM2表达;Western Blotting检测转染后Sp1与PKM2表达。结果:DU145与PC3转染Sp1 si RNA后与NC组比较,剩余葡萄糖显著偏高,乳酸产生显著下降;CCK8实验表明抑制Sp1后能显著抑制前列腺癌细胞的增殖能力;q RT-PCR实验显示抑制Sp1后明显抑制PKM2的表达;Western Blotting显示转染的Sp1 si RNA对Sp1具有较高的沉默效率,且PKM2的表达也降低。结论:Sp1在前列腺癌细胞株DU145与PC3中可通过直接作用于PKM2促进细胞代谢。展开更多
基金Supported by The 2021 Central-Guided Local Science and Technology Development FundLanzhou COVID-19 Prevention and Control Technology Research Project,No.2020-XG-1Gansu Province Outstanding Graduate Student"Innovation Star"Project,No.2022CXZX-748,No.2022CXZX-746.
文摘BACKGROUND The pyruvate dehydrogenase E1 subunitβ(PDHB)gene which regulates energy metabolism is located in mitochondria.However,few studies have elucidated the role and mechanism of PDHB in different cancers.AIM To comprehensive pan-cancer analysis of PDHB was performed based on bioinformatics approaches to explore its tumor diagnostic and prognostic value and tumor immune relevance in cancer.In vitro experiments were performed to examine the biological regulation of PDHB in liver cancer.METHODS Pan-cancer data related to PDHB were obtained from the Cancer Genome Atlas(TCGA)database.Analysis of the gene expression profiles of PDHB was based on TCGA and Genotype Tissue Expression Dataset databases.Cox regression analysis and Kaplan-Meier methods were used to assess the correlation between PDHB expression and survival prognosis in cancer patients.The correlation between PDHB and receiver operating characteristic diagnostic curve,clinicopathological staging,somatic mutation,tumor mutation burden(TMB),microsatellite instability(MSI),DNA methylation,and drug susceptibility in pan-cancer was also analyzed.Various algorithms were used to analyze the correlation between PDHB and immune cell infiltration and tumor chemotaxis environment,as well as the co-expression analysis of PDHB and immune checkpoint(ICP)genes.The expression and functional phenotype of PDHB in single tumor cells were studied by single-cell sequencing,and the functional enrichment analysis of PDHB-related genes was performed.The study also validated the level of mRNA or protein expression of PDHB in several cancers.Finally,in vitro experiments verified the regulatory effect of PDHB on the proliferation,migration,and invasion of liver cancer.RESULTS PDHB was significantly and differently expressed in most cancers.PDHB was significantly associated with prognosis in patients with a wide range of cancers,including kidney renal clear cell carcinoma,kidney renal papillary cell carcinoma,breast invasive carcinoma,and brain lower grade glioma.In some cancers,PDHB expression was clearly associated with gene mutations,clinicopathological stages,and expression of TMB,MSI,and ICP genes.The expression of PDHB was closely related to the infiltration of multiple immune cells in the immune microenvironment and the regulation of tumor chemotaxis environment.In addition,single-cell sequencing results showed that PDHB correlated with different biological phenotypes of multiple cancer single cells.This study further demonstrated that down-regulation of PDHB expression inhibited the proliferation,migration,and invasion functions of hepatoma cells.CONCLUSION As a member of pan-cancer,PDHB may be a novel cancer marker with potential value in diagnosing cancer,predicting prognosis,and in targeted therapy.
文摘目的:确定前列腺癌中Sp1通过PKM2途径对前列腺癌细胞的增殖和代谢的作用。方法:前列腺癌细胞株DU145与PC3体外转染Sp1 si RNA与阴性对照无意义核苷酸序列(NC组),采用葡萄糖检测试剂盒与乳酸检测试剂盒检测转染后有氧糖酵解变化;CCK-8实验检测转染后的细胞增殖;q RT-PCR检测转染后PKM2表达;Western Blotting检测转染后Sp1与PKM2表达。结果:DU145与PC3转染Sp1 si RNA后与NC组比较,剩余葡萄糖显著偏高,乳酸产生显著下降;CCK8实验表明抑制Sp1后能显著抑制前列腺癌细胞的增殖能力;q RT-PCR实验显示抑制Sp1后明显抑制PKM2的表达;Western Blotting显示转染的Sp1 si RNA对Sp1具有较高的沉默效率,且PKM2的表达也降低。结论:Sp1在前列腺癌细胞株DU145与PC3中可通过直接作用于PKM2促进细胞代谢。
