Polygonum cuspidatum is used as a traditional medicinal herb for the therapy of various diseases including several types of cancers. In the present study, we focused on addressing the anti-cancer activity and molecula...Polygonum cuspidatum is used as a traditional medicinal herb for the therapy of various diseases including several types of cancers. In the present study, we focused on addressing the anti-cancer activity and molecular mechanism of methanol extract of Polygonum cuspidatum (MEPC) in HSC-2 human oral cancer cells. The effect of MEPC on oral cancer cells was estimated by 3-(4,5-dimethylthiazol-20yl)-(3-carboxymethoxyphenyl)-2-(4-sulphophenyl)-2H-tetrazolium (MTS) assay, 4’-6-diamidino-2-phenylindole (DAPI) staining and Western blot analysis. MEPC inhibited the cell viability and induced apoptosis through the induction of death receptor (DR) 5. MEPC also increased the expression of C/EBP homologous protein/growth arrest and the DNA damage-inducible gene 153 (CHOP), a transcription factor induced by ER stress. Thus, we concluded that the induction of CHOP leading to DR5 up-regulation is required for the anti-cancer activity of MEPC in HSC-2 cells and MEPC may be a promising drug candidate for oral cancer.展开更多
目的分析2018至2022年肥厚型心肌病的研究进展和热点话题。方法检索Web of Science核心合集数据库,纳入2018年1月1日至2022年12月31日发表的肥厚型心肌病相关文献,进行文献计量学分析。结果共纳入6355篇文献,平均被引频次7次,2021年出...目的分析2018至2022年肥厚型心肌病的研究进展和热点话题。方法检索Web of Science核心合集数据库,纳入2018年1月1日至2022年12月31日发表的肥厚型心肌病相关文献,进行文献计量学分析。结果共纳入6355篇文献,平均被引频次7次,2021年出版文献最多,为1406篇。VOSviewer软件分析显示,肥厚型心肌病相关的猝死研究,特别是磁共振心肌延迟强化对猝死的预测价值是目前的热点话题,此外基因检测和新药mavacamten研究也成为一大热点。美国是目前肥厚型心肌病发文量和文献被引频次最多的国家,中国学者发文量位居第2位,但高质量的研究成果较少。结论猝死危险分层和预防仍是目前肥厚型心肌病领域重要和热点研究内容。国内学者应开展多中心合作,以提高研究成果的水平。展开更多
Alcohol, a widely abused drug, has deleterious effects on the immature nervous system. This study investigates the effect of chronic in vitro ethanol exposure on the metabolism of immature rat cerebellar granular cell...Alcohol, a widely abused drug, has deleterious effects on the immature nervous system. This study investigates the effect of chronic in vitro ethanol exposure on the metabolism of immature rat cerebellar granular cells(CGCs) and on their response to oxygen-glucose deprivation(OGD). Primary CGC cultures were exposed to ethanol(100 mM in culture medium) or to control ethanol-free medium starting day one in vitro(DIV1). At DIV8, the expression of ATP synthase gene ATP5 g3 was quantified using real-time PCR, then cultures were exposed to 3 hours of OGD or normoxic conditions. Subsequently, cellular metabolism was assessed by a resazurin assay and by ATP level measurement. ATP5 g3 expression was reduced by 12-fold(P = 0.03) and resazurin metabolism and ATP level were decreased to 74.4 ± 4.6% and 55.5 ± 6.9%, respectively after chronic ethanol treatment compared to control values(P < 0.01). Additionally, after OGD exposure of ethanol-treated cultures, resazurin metabolism and ATP level were decreased to 12.7 ± 1.0% and 9.0 ± 2.0% from control values(P < 0.01). These results suggest that chronic ethanol exposure reduces the cellular ATP level, possibly through a gene expression down-regulation mechanism, and increases the vulnerability to oxygen-glucose deprivation. Thus, interventions which improve metabolic function and sustain ATP-levels could attenuate ethanol-induced neuronal dysfunction and should be addressed in future studies.展开更多
目的本研究拟证明卵巢癌细胞基因修复功能损伤的程度和程序性死亡配体-1(Programmed death ligand-1,PD-L1)之间的关系,为PD-L1治疗卵巢癌提供依据。方法采用卵巢癌组织芯片(tissue microarray,TMA)样本,非小细胞肺癌TMA为对照。采用辅...目的本研究拟证明卵巢癌细胞基因修复功能损伤的程度和程序性死亡配体-1(Programmed death ligand-1,PD-L1)之间的关系,为PD-L1治疗卵巢癌提供依据。方法采用卵巢癌组织芯片(tissue microarray,TMA)样本,非小细胞肺癌TMA为对照。采用辅助损伤修复检测(repair assisted damage detection,RADD)法和改良的RADD法检测DNA损伤及修复功能缺陷水平。应用免疫组化方法观察卵巢肿瘤细胞中DNA损伤和PD-L1蛋白表达,采用激光共聚焦显微镜对TMAs内的每个组织核芯进行成像并行图像采集。记录每个核芯的荧光强度,绘制图像并计算二者的相关性。结果RADD法和改良RADD法都能有效的检测出肿瘤组织中的DNA损伤水平,其中改良的RADD(mRADD)法检出水平更高。卵巢肿瘤中DNA氧化损伤的发生率很高。随着DNA氧化损伤水平增加,PD-L1在肿瘤中的表达也随之增加。与正常组织相比,高级别浆液性腺癌和子宫内膜样腺癌的DNA损伤水平差异最明显。而且PD-L1表达和DNA损伤水平有很好的相关性。相关性分析发现,采用改良RADD法检测高级别浆液性癌和子宫内膜样腺癌的DNA损伤水平与PD-L1之间都具有良好的相关性。卵巢粘液性腺癌中的DNA损伤水平与PD-L1表达的相关性最高。结论卵巢癌DNA氧化损伤或其与PD-L1协同表达关系可能是改善PD-L1阻断治疗有效性分类筛选中的一个潜在生物标志物。展开更多
目的检测肺癌患者支气管肺泡灌洗液(bronchoalveolar lavage fluid,BALF)中凋亡相关蛋白激酶样蛋白1(death-associated protein kinase like 1,DAPL1)和错配修复基因(Mut L homologue l,MLH1)甲基化水平,进一步研究基因甲基化对早期肺...目的检测肺癌患者支气管肺泡灌洗液(bronchoalveolar lavage fluid,BALF)中凋亡相关蛋白激酶样蛋白1(death-associated protein kinase like 1,DAPL1)和错配修复基因(Mut L homologue l,MLH1)甲基化水平,进一步研究基因甲基化对早期肺癌的诊断价值及其与临床病理特征的关系。方法回顾性选取2022年1月~2024年1月蒙城县第二人民医院收治的疑似早期肺癌患者142例,根据最终病理学结果分为肺癌组(n=82)和肺部良性病变组(n=60)。采用实时定量聚合酶链反应(qRT-PCR)法检测两组BALF样本中DAPL1和MLH1甲基化水平;分析DAPL1和MLH1甲基化对早期肺癌的临床诊断价值及其与肺癌患者临床病理特征的关系。结果肺癌组患者BALF中DAPL1和MLH1基因甲基化水平分别为53.66%(44/82),56.10%(46/82),明显高于良性病变组的11.67%(7/60)和18.33%(11/60),差异具有统计学意义(χ^(2)=56.544,20.565,均P<0.05)。DAPL1和MLH1基因甲基化诊断早期肺癌的敏感度分别为53.66%(44/82)和56.10%(46/82),特异度分别为88.33%(53/60)和81.67%(49/60),准确度分别为68.31%(97/142)和66.90%(95/142);DAPL1甲基化联合MLH1甲基化诊断早期肺癌的敏感度和准确度分别为86.59%(71/82),85.92%(122/142),均高于单一指标(Z=24.411,16.450,均P<0.05)。肺癌患者BALF中DAPL1和MLH1基因甲基化水平与临床分期、吸烟史及淋巴结转移密切相关(χ^(2)=5.493,13.083;8.167,6.946;9.303,4.523,均P<0.05)。Spearman相关性显示,DAPL1和MLH1基因甲基化与肺癌患者临床分期、吸烟史及淋巴结转移均呈正相关(r=0.523,0.602;0.548,0.498;0.630,0.524,均P<0.05)。结论BALF中DAPL1和MLH1基因甲基化检测对于早期肺癌具有较高的临床诊断价值,且两者基因甲基化水平与肺癌患者病情进展及吸烟史有关。展开更多
目的探讨三阴性乳腺癌中程序性细胞死亡基因4(programmed cell death gene 4,PDCD4)的表达及其与患者预后的关系。方法收集广东省妇幼保健院乳腺科2007年1月至2012年12月间收治的随访资料完整的三阴性乳腺癌患者共176例,均为女性,中位年...目的探讨三阴性乳腺癌中程序性细胞死亡基因4(programmed cell death gene 4,PDCD4)的表达及其与患者预后的关系。方法收集广东省妇幼保健院乳腺科2007年1月至2012年12月间收治的随访资料完整的三阴性乳腺癌患者共176例,均为女性,中位年龄44岁。采用免疫组化方法检测PDCD4的表达;采用Kaplan-meier法对患者的无病生存及总生存情况进行分析,并运用Cox回归法探讨影响三阴性乳腺癌生存预后的因素。结果 176例患者中,PDCD4表达阳性者79例(44.8%),显著低于癌旁组织阳性表达率(90.0%,P=0.005)。PDCD4表达缺失与年龄无关(P>0.05),而与肿瘤直径、淋巴结转移个数及组织学分级相关(P<0.05),肿瘤越大(r=-0.270,P<0.001)、淋巴结转移越多(r=-0.240,P=0.001)、组织学分级越高(r=-0.206,P=0.006),PDCD4阳性表达率越低。中位随访时间42个月,单因素分析显示PDCD4表达阳性者其无病生存率及总生存率均优于表达阴性者(P<0.05)。多因素分析显示PDCD4表达、肿瘤直径及分期是影响三阴性乳腺癌预后的独立因素(P<0.05)。结论三阴性乳腺癌中PDCD4表达缺失与预后不良相关,PDCD4可作为评估三阴性乳腺癌预后的指标。展开更多
文摘Polygonum cuspidatum is used as a traditional medicinal herb for the therapy of various diseases including several types of cancers. In the present study, we focused on addressing the anti-cancer activity and molecular mechanism of methanol extract of Polygonum cuspidatum (MEPC) in HSC-2 human oral cancer cells. The effect of MEPC on oral cancer cells was estimated by 3-(4,5-dimethylthiazol-20yl)-(3-carboxymethoxyphenyl)-2-(4-sulphophenyl)-2H-tetrazolium (MTS) assay, 4’-6-diamidino-2-phenylindole (DAPI) staining and Western blot analysis. MEPC inhibited the cell viability and induced apoptosis through the induction of death receptor (DR) 5. MEPC also increased the expression of C/EBP homologous protein/growth arrest and the DNA damage-inducible gene 153 (CHOP), a transcription factor induced by ER stress. Thus, we concluded that the induction of CHOP leading to DR5 up-regulation is required for the anti-cancer activity of MEPC in HSC-2 cells and MEPC may be a promising drug candidate for oral cancer.
文摘目的分析2018至2022年肥厚型心肌病的研究进展和热点话题。方法检索Web of Science核心合集数据库,纳入2018年1月1日至2022年12月31日发表的肥厚型心肌病相关文献,进行文献计量学分析。结果共纳入6355篇文献,平均被引频次7次,2021年出版文献最多,为1406篇。VOSviewer软件分析显示,肥厚型心肌病相关的猝死研究,特别是磁共振心肌延迟强化对猝死的预测价值是目前的热点话题,此外基因检测和新药mavacamten研究也成为一大热点。美国是目前肥厚型心肌病发文量和文献被引频次最多的国家,中国学者发文量位居第2位,但高质量的研究成果较少。结论猝死危险分层和预防仍是目前肥厚型心肌病领域重要和热点研究内容。国内学者应开展多中心合作,以提高研究成果的水平。
基金supported by a grant of the Romanian National Authority for Scientific Research,project PN-II-PT-PCCA-2011-3,No 80/2012
文摘Alcohol, a widely abused drug, has deleterious effects on the immature nervous system. This study investigates the effect of chronic in vitro ethanol exposure on the metabolism of immature rat cerebellar granular cells(CGCs) and on their response to oxygen-glucose deprivation(OGD). Primary CGC cultures were exposed to ethanol(100 mM in culture medium) or to control ethanol-free medium starting day one in vitro(DIV1). At DIV8, the expression of ATP synthase gene ATP5 g3 was quantified using real-time PCR, then cultures were exposed to 3 hours of OGD or normoxic conditions. Subsequently, cellular metabolism was assessed by a resazurin assay and by ATP level measurement. ATP5 g3 expression was reduced by 12-fold(P = 0.03) and resazurin metabolism and ATP level were decreased to 74.4 ± 4.6% and 55.5 ± 6.9%, respectively after chronic ethanol treatment compared to control values(P < 0.01). Additionally, after OGD exposure of ethanol-treated cultures, resazurin metabolism and ATP level were decreased to 12.7 ± 1.0% and 9.0 ± 2.0% from control values(P < 0.01). These results suggest that chronic ethanol exposure reduces the cellular ATP level, possibly through a gene expression down-regulation mechanism, and increases the vulnerability to oxygen-glucose deprivation. Thus, interventions which improve metabolic function and sustain ATP-levels could attenuate ethanol-induced neuronal dysfunction and should be addressed in future studies.
文摘目的检测肺癌患者支气管肺泡灌洗液(bronchoalveolar lavage fluid,BALF)中凋亡相关蛋白激酶样蛋白1(death-associated protein kinase like 1,DAPL1)和错配修复基因(Mut L homologue l,MLH1)甲基化水平,进一步研究基因甲基化对早期肺癌的诊断价值及其与临床病理特征的关系。方法回顾性选取2022年1月~2024年1月蒙城县第二人民医院收治的疑似早期肺癌患者142例,根据最终病理学结果分为肺癌组(n=82)和肺部良性病变组(n=60)。采用实时定量聚合酶链反应(qRT-PCR)法检测两组BALF样本中DAPL1和MLH1甲基化水平;分析DAPL1和MLH1甲基化对早期肺癌的临床诊断价值及其与肺癌患者临床病理特征的关系。结果肺癌组患者BALF中DAPL1和MLH1基因甲基化水平分别为53.66%(44/82),56.10%(46/82),明显高于良性病变组的11.67%(7/60)和18.33%(11/60),差异具有统计学意义(χ^(2)=56.544,20.565,均P<0.05)。DAPL1和MLH1基因甲基化诊断早期肺癌的敏感度分别为53.66%(44/82)和56.10%(46/82),特异度分别为88.33%(53/60)和81.67%(49/60),准确度分别为68.31%(97/142)和66.90%(95/142);DAPL1甲基化联合MLH1甲基化诊断早期肺癌的敏感度和准确度分别为86.59%(71/82),85.92%(122/142),均高于单一指标(Z=24.411,16.450,均P<0.05)。肺癌患者BALF中DAPL1和MLH1基因甲基化水平与临床分期、吸烟史及淋巴结转移密切相关(χ^(2)=5.493,13.083;8.167,6.946;9.303,4.523,均P<0.05)。Spearman相关性显示,DAPL1和MLH1基因甲基化与肺癌患者临床分期、吸烟史及淋巴结转移均呈正相关(r=0.523,0.602;0.548,0.498;0.630,0.524,均P<0.05)。结论BALF中DAPL1和MLH1基因甲基化检测对于早期肺癌具有较高的临床诊断价值,且两者基因甲基化水平与肺癌患者病情进展及吸烟史有关。
