Objective:To analyze the expression and clinical significance of the zinc finger protein ZNF207 gene in liver hepatocellular carcinoma(LIHC)based on The Cancer Genome Atlas(TCGA)database.Methods:The mRNA sequencing da...Objective:To analyze the expression and clinical significance of the zinc finger protein ZNF207 gene in liver hepatocellular carcinoma(LIHC)based on The Cancer Genome Atlas(TCGA)database.Methods:The mRNA sequencing data of 371 cases of primary liver cancer,50 cases of normal tissues,and 3 cases of recurrent liver cancer were downloaded from the TCGA database.The corresponding clinical information of the 371 cases of hepatocellular carcinoma was subsequently analyzed.The difference in ZNF207 expression between normal and tumor tissues was analyzed using the UALCAN online database.The impact of ZNF207 expression on survival prognosis was assessed using the Kaplan-Meier method in R software.The GO and KEGG pathways of ZNF207 were analyzed.The Cox proportional hazards model was used to evaluate the prognostic factors of patients with LIHC.RT-qPCR was employed to verify the expression of ZNF207 in LIHC cells.Results:ZNF207 was highly expressed in LIHC tissues and HepG2 cells,with a significant difference(P<0.05).Multivariate Cox regression analysis revealed that patients with high ZNF207 expression had a significantly shorter overall survival time compared to those with low ZNF207 expression(HR=1.466,95%CI:1.011-2.126,P<0.05).GO enrichment analysis suggested that ZNF207 may influence the onset and progression of hepatocellular carcinoma by regulating mRNA splicing and mRNA transcription processing through the spliceosome.KEGG pathway enrichment analysis indicated that ZNF207 might affect the onset and progression of hepatocellular carcinoma through mitophagy,mRNA surveillance,homologous recombination,spliceosome,and nuclear-cytoplasmic transport.Conclusion:The expression of ZNF207 may be an independent predictor of the prognosis of patients with LIHC and could influence the development of hepatocellular carcinoma through various gene functions and pathways.It has the potential to serve as a novel molecular marker for predicting the prognosis of hepatocellular carcinoma.展开更多
背景与目的目前,肺癌依然是我国发病率和死亡率最高的恶性肿瘤。而在早期肺腺癌(lung adenocarcinoma,LUAD)中,微乳头(micropapillary,MPP)成分尤其常见,且通常表现出高侵袭性,其与早期转移、淋巴浸润的风险以及患者的5年生存率显著相...背景与目的目前,肺癌依然是我国发病率和死亡率最高的恶性肿瘤。而在早期肺腺癌(lung adenocarcinoma,LUAD)中,微乳头(micropapillary,MPP)成分尤其常见,且通常表现出高侵袭性,其与早期转移、淋巴浸润的风险以及患者的5年生存率显著相关。本研究旨在探究以磨玻璃影(ground-glass opacities,GGOs)为特征的早期LUAD中MPP成分和非MPP成分的异同,寻找MPP成分所特有的突变特征,并分析锌指蛋白家族的ZNF469基因与早期LUAD预后以及免疫浸润的关系。方法收集31例LUAD恶性肺结节,采用显微解剖法将其分为成对的MPP和非MPP成分。对早期恶性肺结节组分进行全外显子组测序(whole-exome sequencing,WES),利用maftools、非负矩阵分解(Nonnegative Matrix Factorization,NMF)法、Sigminer等方法进行突变特征分析,以揭示侵袭性LUAD中MPP组分相比于其他肿瘤组织所特有的基因组突变特征。利用癌症基因组图谱(The Cancer Genome Atlas,TCGA)的LUAD数据库中ZNF469的表达情况,探讨其与肺癌预后的关系;利用GeneMANIA数据库以及基因本体(Gene Ontology,GO)、京都基因与基因组百科全书(Kyoto Encyclopedia of Genes and Genomes,KEGG)富集分析探索LUAD中与ZNF469相关基因的互作网络及信号通路;利用TIMER和TISIDB数据库分析ZNF469表达与LUAD中免疫细胞浸润水平的相关性。结果MPP成分具有较多的基因组变异,相比于非MPP成分的肿瘤组织,癌症体细胞突变目录(Catalogue of Somatic Mutations in Cancer,COSMIC)的13号突变特征(胞苷脱氨酶家族,APOBEC)是MPP成分所特有的,这提示其参与了MPP成分对LUAD早期侵袭过程的促进作用;并且APOBEC特征高的MPP样本具有更高的肿瘤突变负荷(tumor mutational burden,TMB),提示这些患者更能从免疫治疗中获益。LUAD中突变ZNF469的表达高于正常组织,与LUAD患者的不良预后有关。基因互作网络分析以及GO和KEGG富集分析发现,COL6A1、COL1A1、COL1A2、TGFB2、MMP2、COL8A2、C2CD4C等与ZNF469具有相互作用,且主要与编码胶原蛋白、参与细胞外基质构成有关。ZNF469表达与肿瘤的免疫浸润呈正相关。结论本研究揭示了中国人群侵袭性LUAD中MPP成分的特有突变特征,并发现突变ZNF469的高表达影响LUAD预后与免疫浸润,推测ZNF469可作为LUAD潜在的诊断及预后生物标志物。展开更多
目的:探讨血浆锌指蛋白582(zinc finger protein 582,ZNF582)基因甲基化检测用于结直肠癌早期诊断的可行性。方法:选择2021年1月至2022年6月在昆山市中医医院就诊的结直肠癌患者78例(直肠癌组)、结直肠息肉患者62例(结直肠息肉组)为研...目的:探讨血浆锌指蛋白582(zinc finger protein 582,ZNF582)基因甲基化检测用于结直肠癌早期诊断的可行性。方法:选择2021年1月至2022年6月在昆山市中医医院就诊的结直肠癌患者78例(直肠癌组)、结直肠息肉患者62例(结直肠息肉组)为研究对象,另选83例结肠镜检查正常者作为正常对照组。采用甲基化特异性荧光定量PCR检测血浆中ZNF582的甲基化状态,并进行统计学分析。结果:ZNF582在结直肠癌组患者血浆中的甲基化水平显著高于结直肠息肉组和正常对照组(P<0.0001)。ROC曲线分析显示,ZNF582甲基化用于诊断结直肠癌的AUC为0.879(95%CI 0.818~0.925)。ZNF582甲基化对结直肠息肉和结直肠癌的检测灵敏度分别为37.1%、73.1%,对结直肠病变的诊断特异性为90.4%。ZNF582甲基化对不同性别、分期、分化程度以及肿瘤大小的结直肠癌检测灵敏度无显著差异。结论:血浆ZNF582可以作为一种潜在的操作简便的、非侵入性结直肠癌早期诊断替代方案。展开更多
目的:制备Trim26/ZNF173条件性基因敲除小鼠,为研究Trim26基因在肝癌发生中的作用及其机制提供动物模型。方法:设计基因敲除策略,Trim26的外显子5~7缺失引起的移码突变会破坏蛋白结构域,进而导致Trim26蛋白功能丧失。为此,我们拟删除Tri...目的:制备Trim26/ZNF173条件性基因敲除小鼠,为研究Trim26基因在肝癌发生中的作用及其机制提供动物模型。方法:设计基因敲除策略,Trim26的外显子5~7缺失引起的移码突变会破坏蛋白结构域,进而导致Trim26蛋白功能丧失。为此,我们拟删除Trim26基因的外显子5~7,以借助Cre/lox P系统构建Trim26基因条件性敲除的小鼠。简单地说,先获得嵌合体小鼠,选择高嵌合率小鼠与B6/N小鼠交配获得F1代Trim26fl/wt基因型的杂合子小鼠。F1代杂合子小鼠自交得到F2代Trim26fl/fl基因型的纯合小鼠和对照野生型小鼠。提取鼠尾基因组DNA并行PCR鉴定基因型,在DNA水平确定小鼠的基因型。结果:成功构建了打靶载体,打靶载体经限制性内切酶线性化后,成功电转导入了B6/BLU ES 细胞中,ES克隆经过LR-PCR初筛及Southern blot进一步验证,确定得到了3株中靶ES细胞(即3D、6A和10F),将中靶ES细胞扩增后进行囊胚注射,获得了12只Trim26的嵌合体小鼠(嵌合率不小于50%)。选择性成熟后的高嵌合率小鼠与B6/N小鼠交配繁育,得到F1代小鼠,PCR鉴定基因型确认获得了Trim26fl/wt基因型的F1代杂合子小鼠。性成熟后的F1代杂合子小鼠合笼交配后得到F2代小鼠,PCR鉴定基因型确认获得了纯合的Trim26条件性基因敲除小鼠(基因型为Trim26fl/fl)。结论:成功制备了Trim26条件性基因敲除小鼠,为进一步解析Trim26在肝癌发生中的作用及机制打下了良好基础。展开更多
Retrotransposons,a type of DNA fragment that can mobilize itself on genome,can generate genetic variations and develop for molecular markers based on the insertion polymorphism.Zinc finger proteins(ZNFs)are among the ...Retrotransposons,a type of DNA fragment that can mobilize itself on genome,can generate genetic variations and develop for molecular markers based on the insertion polymorphism.Zinc finger proteins(ZNFs)are among the most abundant proteins in eukaryotic animals,and their functions are extraordinarily diverse and particularly important in gene regulation.In the current study,bioinformatic prediction was performed to screen for retrotransposon insertion polymorphisms(RIPs)in six ZNF genes(ZNF2,ZNF3,ZNF7,ZNF8,ZNF10 and ZNF12).Six RIPs in these ZNFs,including one short interspersed nuclear element(SINE)RIP in intron 1 and one long interspersed nuclear element 1(L1)RIP in intron 3 of ZNF2,one SINE RIP in 5′flanking region and one SINE RIP in intron 2 of ZNF3,one SINE RIP in 3′UTR of ZNF7 and one L1 RIP in intron 2 of ZNF12,were discovered and their presence was confirmed by PCR.The impact of the SINE RIP in the first intron of ZNF2,which is close to the core promoter of ZNF2,on the gene activity was investigated by dual-luciferase assay in three cell lines.Our results showed that the SINE insertion in the intron 1 of ZNF2 repressed the core promoter activity extremely significantly(P<0.01)in cervical cancer cells and porcine primary embryonic fibroblasts(HeLa and PEF),thus SINE may act as a repressor.This SINE RIP also significantly(P<0.05)affected the corrected back fat thickness in Yorkshire pigs.The corrected back fat thickness of individuals with SINE insertion in the first intron of ZNF2 was significantly(P<0.05)higher than that of individuals without SINE insertion.In summary,our data suggested that RIPs play important roles in the genetic variations of these ZNF genes and SINE RIP in the intron 1 of ZNF2 may provide a useful molecular marker for the screening of fat deposition in the pig breeding.展开更多
由染色体易位引起的融合基因已成为白血病的主要致病因素。锌指蛋白384(zinc finger protein 384,ZNF384)融合作为急性白血病(acute leukemia,AL)中的非典型融合亚型,在不同的年龄群体中广泛发生。ZNF384具有丰富的融合伴侣,其中E1A结...由染色体易位引起的融合基因已成为白血病的主要致病因素。锌指蛋白384(zinc finger protein 384,ZNF384)融合作为急性白血病(acute leukemia,AL)中的非典型融合亚型,在不同的年龄群体中广泛发生。ZNF384具有丰富的融合伴侣,其中E1A结合蛋白p300(E1A binding protein p300,EP300)、转录因子3(transcription factor 3,TCF3)、TATA-box binding protein associated factor 15(TAF15)的融合频率最高。这些融合蛋白均保留了完整的ZNF384结构,但融合伴侣则有不同程度的缺失,说明不同的ZNF384融合亚型之间具有相似的致AL发生发展机制。现有研究主要认为ZNF384融合蛋白通过染色质重塑调控下游蛋白的转录表达,在造血干细胞的分化、癌细胞的增殖凋亡和基因组修复中发挥潜在作用。ZNF384融合患者同时表达淋系和髓系特有的抗原,在疾病的进展中具有谱系转化特性,丰富的免疫表型给治疗方式带来了不确定性,并与融合亚型、发病年龄一起影响患者的临床结局。该文通过对近10年已发表的案例和大型队列研究进行统计归纳分析,进一步确认了ZNF384融合及其各亚型AL在现有研究背景下的发生频率,总结了已有的机制信息,并对不同治疗方式下ZNF384融合患者的预后作了简要分析,以期为后续针对这一独特亚型AL的诊疗和研究提供参考。展开更多
文摘Objective:To analyze the expression and clinical significance of the zinc finger protein ZNF207 gene in liver hepatocellular carcinoma(LIHC)based on The Cancer Genome Atlas(TCGA)database.Methods:The mRNA sequencing data of 371 cases of primary liver cancer,50 cases of normal tissues,and 3 cases of recurrent liver cancer were downloaded from the TCGA database.The corresponding clinical information of the 371 cases of hepatocellular carcinoma was subsequently analyzed.The difference in ZNF207 expression between normal and tumor tissues was analyzed using the UALCAN online database.The impact of ZNF207 expression on survival prognosis was assessed using the Kaplan-Meier method in R software.The GO and KEGG pathways of ZNF207 were analyzed.The Cox proportional hazards model was used to evaluate the prognostic factors of patients with LIHC.RT-qPCR was employed to verify the expression of ZNF207 in LIHC cells.Results:ZNF207 was highly expressed in LIHC tissues and HepG2 cells,with a significant difference(P<0.05).Multivariate Cox regression analysis revealed that patients with high ZNF207 expression had a significantly shorter overall survival time compared to those with low ZNF207 expression(HR=1.466,95%CI:1.011-2.126,P<0.05).GO enrichment analysis suggested that ZNF207 may influence the onset and progression of hepatocellular carcinoma by regulating mRNA splicing and mRNA transcription processing through the spliceosome.KEGG pathway enrichment analysis indicated that ZNF207 might affect the onset and progression of hepatocellular carcinoma through mitophagy,mRNA surveillance,homologous recombination,spliceosome,and nuclear-cytoplasmic transport.Conclusion:The expression of ZNF207 may be an independent predictor of the prognosis of patients with LIHC and could influence the development of hepatocellular carcinoma through various gene functions and pathways.It has the potential to serve as a novel molecular marker for predicting the prognosis of hepatocellular carcinoma.
文摘背景与目的目前,肺癌依然是我国发病率和死亡率最高的恶性肿瘤。而在早期肺腺癌(lung adenocarcinoma,LUAD)中,微乳头(micropapillary,MPP)成分尤其常见,且通常表现出高侵袭性,其与早期转移、淋巴浸润的风险以及患者的5年生存率显著相关。本研究旨在探究以磨玻璃影(ground-glass opacities,GGOs)为特征的早期LUAD中MPP成分和非MPP成分的异同,寻找MPP成分所特有的突变特征,并分析锌指蛋白家族的ZNF469基因与早期LUAD预后以及免疫浸润的关系。方法收集31例LUAD恶性肺结节,采用显微解剖法将其分为成对的MPP和非MPP成分。对早期恶性肺结节组分进行全外显子组测序(whole-exome sequencing,WES),利用maftools、非负矩阵分解(Nonnegative Matrix Factorization,NMF)法、Sigminer等方法进行突变特征分析,以揭示侵袭性LUAD中MPP组分相比于其他肿瘤组织所特有的基因组突变特征。利用癌症基因组图谱(The Cancer Genome Atlas,TCGA)的LUAD数据库中ZNF469的表达情况,探讨其与肺癌预后的关系;利用GeneMANIA数据库以及基因本体(Gene Ontology,GO)、京都基因与基因组百科全书(Kyoto Encyclopedia of Genes and Genomes,KEGG)富集分析探索LUAD中与ZNF469相关基因的互作网络及信号通路;利用TIMER和TISIDB数据库分析ZNF469表达与LUAD中免疫细胞浸润水平的相关性。结果MPP成分具有较多的基因组变异,相比于非MPP成分的肿瘤组织,癌症体细胞突变目录(Catalogue of Somatic Mutations in Cancer,COSMIC)的13号突变特征(胞苷脱氨酶家族,APOBEC)是MPP成分所特有的,这提示其参与了MPP成分对LUAD早期侵袭过程的促进作用;并且APOBEC特征高的MPP样本具有更高的肿瘤突变负荷(tumor mutational burden,TMB),提示这些患者更能从免疫治疗中获益。LUAD中突变ZNF469的表达高于正常组织,与LUAD患者的不良预后有关。基因互作网络分析以及GO和KEGG富集分析发现,COL6A1、COL1A1、COL1A2、TGFB2、MMP2、COL8A2、C2CD4C等与ZNF469具有相互作用,且主要与编码胶原蛋白、参与细胞外基质构成有关。ZNF469表达与肿瘤的免疫浸润呈正相关。结论本研究揭示了中国人群侵袭性LUAD中MPP成分的特有突变特征,并发现突变ZNF469的高表达影响LUAD预后与免疫浸润,推测ZNF469可作为LUAD潜在的诊断及预后生物标志物。
文摘目的:探讨血浆锌指蛋白582(zinc finger protein 582,ZNF582)基因甲基化检测用于结直肠癌早期诊断的可行性。方法:选择2021年1月至2022年6月在昆山市中医医院就诊的结直肠癌患者78例(直肠癌组)、结直肠息肉患者62例(结直肠息肉组)为研究对象,另选83例结肠镜检查正常者作为正常对照组。采用甲基化特异性荧光定量PCR检测血浆中ZNF582的甲基化状态,并进行统计学分析。结果:ZNF582在结直肠癌组患者血浆中的甲基化水平显著高于结直肠息肉组和正常对照组(P<0.0001)。ROC曲线分析显示,ZNF582甲基化用于诊断结直肠癌的AUC为0.879(95%CI 0.818~0.925)。ZNF582甲基化对结直肠息肉和结直肠癌的检测灵敏度分别为37.1%、73.1%,对结直肠病变的诊断特异性为90.4%。ZNF582甲基化对不同性别、分期、分化程度以及肿瘤大小的结直肠癌检测灵敏度无显著差异。结论:血浆ZNF582可以作为一种潜在的操作简便的、非侵入性结直肠癌早期诊断替代方案。
文摘目的:制备Trim26/ZNF173条件性基因敲除小鼠,为研究Trim26基因在肝癌发生中的作用及其机制提供动物模型。方法:设计基因敲除策略,Trim26的外显子5~7缺失引起的移码突变会破坏蛋白结构域,进而导致Trim26蛋白功能丧失。为此,我们拟删除Trim26基因的外显子5~7,以借助Cre/lox P系统构建Trim26基因条件性敲除的小鼠。简单地说,先获得嵌合体小鼠,选择高嵌合率小鼠与B6/N小鼠交配获得F1代Trim26fl/wt基因型的杂合子小鼠。F1代杂合子小鼠自交得到F2代Trim26fl/fl基因型的纯合小鼠和对照野生型小鼠。提取鼠尾基因组DNA并行PCR鉴定基因型,在DNA水平确定小鼠的基因型。结果:成功构建了打靶载体,打靶载体经限制性内切酶线性化后,成功电转导入了B6/BLU ES 细胞中,ES克隆经过LR-PCR初筛及Southern blot进一步验证,确定得到了3株中靶ES细胞(即3D、6A和10F),将中靶ES细胞扩增后进行囊胚注射,获得了12只Trim26的嵌合体小鼠(嵌合率不小于50%)。选择性成熟后的高嵌合率小鼠与B6/N小鼠交配繁育,得到F1代小鼠,PCR鉴定基因型确认获得了Trim26fl/wt基因型的F1代杂合子小鼠。性成熟后的F1代杂合子小鼠合笼交配后得到F2代小鼠,PCR鉴定基因型确认获得了纯合的Trim26条件性基因敲除小鼠(基因型为Trim26fl/fl)。结论:成功制备了Trim26条件性基因敲除小鼠,为进一步解析Trim26在肝癌发生中的作用及机制打下了良好基础。
基金supported by the National Natural Science Foundation of China(32002146 and 31872977)the China Postdoctoral Science Foundation(2020M671630)+3 种基金the Jiangsu Postdoctoral Science Foundation of China(2021K221B)to Chen Caithe Jiangsu Agriculture Science and Technology Innovation Fund,China[CX(19)2016]the Priority Academic Program Development of Jiangsu Higher Education Institutionsthe High-end Talent Support Program of Yangzhou University,China to Song Chengyi。
文摘Retrotransposons,a type of DNA fragment that can mobilize itself on genome,can generate genetic variations and develop for molecular markers based on the insertion polymorphism.Zinc finger proteins(ZNFs)are among the most abundant proteins in eukaryotic animals,and their functions are extraordinarily diverse and particularly important in gene regulation.In the current study,bioinformatic prediction was performed to screen for retrotransposon insertion polymorphisms(RIPs)in six ZNF genes(ZNF2,ZNF3,ZNF7,ZNF8,ZNF10 and ZNF12).Six RIPs in these ZNFs,including one short interspersed nuclear element(SINE)RIP in intron 1 and one long interspersed nuclear element 1(L1)RIP in intron 3 of ZNF2,one SINE RIP in 5′flanking region and one SINE RIP in intron 2 of ZNF3,one SINE RIP in 3′UTR of ZNF7 and one L1 RIP in intron 2 of ZNF12,were discovered and their presence was confirmed by PCR.The impact of the SINE RIP in the first intron of ZNF2,which is close to the core promoter of ZNF2,on the gene activity was investigated by dual-luciferase assay in three cell lines.Our results showed that the SINE insertion in the intron 1 of ZNF2 repressed the core promoter activity extremely significantly(P<0.01)in cervical cancer cells and porcine primary embryonic fibroblasts(HeLa and PEF),thus SINE may act as a repressor.This SINE RIP also significantly(P<0.05)affected the corrected back fat thickness in Yorkshire pigs.The corrected back fat thickness of individuals with SINE insertion in the first intron of ZNF2 was significantly(P<0.05)higher than that of individuals without SINE insertion.In summary,our data suggested that RIPs play important roles in the genetic variations of these ZNF genes and SINE RIP in the intron 1 of ZNF2 may provide a useful molecular marker for the screening of fat deposition in the pig breeding.
文摘由染色体易位引起的融合基因已成为白血病的主要致病因素。锌指蛋白384(zinc finger protein 384,ZNF384)融合作为急性白血病(acute leukemia,AL)中的非典型融合亚型,在不同的年龄群体中广泛发生。ZNF384具有丰富的融合伴侣,其中E1A结合蛋白p300(E1A binding protein p300,EP300)、转录因子3(transcription factor 3,TCF3)、TATA-box binding protein associated factor 15(TAF15)的融合频率最高。这些融合蛋白均保留了完整的ZNF384结构,但融合伴侣则有不同程度的缺失,说明不同的ZNF384融合亚型之间具有相似的致AL发生发展机制。现有研究主要认为ZNF384融合蛋白通过染色质重塑调控下游蛋白的转录表达,在造血干细胞的分化、癌细胞的增殖凋亡和基因组修复中发挥潜在作用。ZNF384融合患者同时表达淋系和髓系特有的抗原,在疾病的进展中具有谱系转化特性,丰富的免疫表型给治疗方式带来了不确定性,并与融合亚型、发病年龄一起影响患者的临床结局。该文通过对近10年已发表的案例和大型队列研究进行统计归纳分析,进一步确认了ZNF384融合及其各亚型AL在现有研究背景下的发生频率,总结了已有的机制信息,并对不同治疗方式下ZNF384融合患者的预后作了简要分析,以期为后续针对这一独特亚型AL的诊疗和研究提供参考。