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Diallyl disulfide-induced G2/M arrest of human gastric cancer MGC803 cells involves activation of p38 MAP kinase pathways 被引量:25
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作者 Jing-PingYuan Gui-HuaWang +6 位作者 HuiLing QiSu Yue-HongYang YingSong Rong-JunTang YaoLiu ChenHuang 《World Journal of Gastroenterology》 SCIE CAS CSCD 2004年第18期2731-2734,共4页
AIM: To determine the role of p38 MAP kinase signal transduction pathways in diallyl disulfide (DADS)-induced G2/M arrest in human gastric cancer MGC803 cells.METHODS: MGC803 cell growth inhibition was measured by MTT... AIM: To determine the role of p38 MAP kinase signal transduction pathways in diallyl disulfide (DADS)-induced G2/M arrest in human gastric cancer MGC803 cells.METHODS: MGC803 cell growth inhibition was measured by MTT assay. Phase distribution of cell cyde was analyzed by flow cytometry. Expression of Cdc25C, p38, phosphorylation of p38 (pp38) were determined by Western blotting.RESULTS: MT1- assay showed that SB203580, a specific p38 MAPK inhibitor blocked DADS-induced growth inhibition.Flow cytometry analysis revealed that treatment of MGC803 cells with 30 mg/L DADS increased the percentage of cells in the G2/M phase from 9.3% to 39.4% (P<0.05), whereas inhibition of p38 activity by SB203580 abolished induction of G2/M arrest by DADS. Western blotting showed that phosphorylation of p38 was increased 3.52-fold following treatment of MGC803 cells with 30 mg/L DADS for 20 min(P<0.05), whereas Cdc25C was decreased 68% following treatment of MGCS03 cells with 30 mg/L DADS for 24 h(P<0.05). Decreased Cdc25C protein expression by DADS was attenuated by SB203580 (P<0.05).CONCLUSION: DADS-induced G2/M arrest of MGC803 cells involves activation of p38 MAP kinase pathways.Decreased Cdc25C protein expression by p38 MAPK played a crucial role in G2/M arrest after treatment with DADS. 展开更多
关键词 己二烯 二硫化物 感应 g2/m 胃癌 mgC803 癌细胞 活化作用 P38 mAP激酶 肿瘤
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CA-4类衍生物LGD5诱导人宫颈癌HeLa细胞发生G2/M周期阻滞和凋亡的机制研究
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作者 庞丽丽 胡莹 +2 位作者 罗洁 涂勤 陈岷 《中国临床药理学与治疗学》 CAS CSCD 北大核心 2024年第10期1100-1109,共10页
目的:探究微管抑制剂CA-4类衍生物LGD5对人宫颈癌HeLa细胞的作用机制。方法:选用HeLa细胞,分为空白组、CA-4阳性对照组、不同浓度的LGD5组成实验组。采用MTT法考察LGD5对HeLa细胞的生长抑制情况并确定实验浓度,采用倒置显微镜和吖啶橙... 目的:探究微管抑制剂CA-4类衍生物LGD5对人宫颈癌HeLa细胞的作用机制。方法:选用HeLa细胞,分为空白组、CA-4阳性对照组、不同浓度的LGD5组成实验组。采用MTT法考察LGD5对HeLa细胞的生长抑制情况并确定实验浓度,采用倒置显微镜和吖啶橙染色观察用药前后HeLa细胞形态学变化及细胞凋亡情况,采用DAPI免疫荧光染色考察LGD5对微管的作用,采用PI流式细胞术考察LGD5对细胞周期的影响,采用蛋白免疫印迹法考察LGD5对细胞周期蛋白和凋亡相关蛋白的影响。结果:MTT实验结果显示LGD5抑制HeLa细胞的生长抑制具有时间依赖性和剂量依赖性。定时拍照和吖啶橙染色观察到LGD5诱导HeLa细胞发生凋亡,并产生明显的染色质凝集和凋亡小体。DAPI染色观察到LGD5抑制HeLa细胞的微管聚合。PI流式细胞术结果显示LGD5诱导HeLa细胞发生G2/M周期阻滞,在12 h内具有时间依赖性和剂量依赖性,且差异有统计学意义(P<0.01),24 h以后引起细胞凋亡且具有时间依赖性;Western blot结果显示,LGD5下调Cdc2和Cdc25C,上调p-Cdc2、Cyclin B1和p-histone H3,进一步验证LGD5诱导HeLa细胞发生G2/M周期阻滞,除此之外,LGD5使HeLa细胞Caspase 3表达增加,上调Caspase 9和Bax,下调Pro-caspase 9和Bcl-2,说明LGD5诱导HeLa细胞凋亡与线粒体途径有关。结论:CA-4类衍生物LGD5可抑制HeLa细胞的微管聚合,诱导其发生G2/M周期阻滞,进而通过线粒体途径诱导细胞发生凋亡。 展开更多
关键词 CA-4 微管 肿瘤 g2/m细胞周期阻滞 细胞凋亡 作用机制
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二烯丙基二硫通过磷酸化Chk1负调控Cdc25C/CyclinB1/CDK1通路阻滞白血病K562细胞G_(2)/M期
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作者 陆丽峰 夏红 +3 位作者 何洁 凌晖 谭晖 苏琦 《现代肿瘤医学》 CAS 2024年第12期2177-2182,共6页
目的:研究二烯丙基二硫(diallyl disulfide,DADS)诱导人白血病K562细胞周期阻滞及其分子机制。方法:采用CCK-8、细胞计数及流式细胞术观察DADS对K562细胞增殖与周期阻滞效应。Western Blot检测DADS对K562细胞PCNA、Chk1/2以及下游分子Cd... 目的:研究二烯丙基二硫(diallyl disulfide,DADS)诱导人白血病K562细胞周期阻滞及其分子机制。方法:采用CCK-8、细胞计数及流式细胞术观察DADS对K562细胞增殖与周期阻滞效应。Western Blot检测DADS对K562细胞PCNA、Chk1/2以及下游分子Cdc25C、CyclinB1与CDK1表达的影响。结果:CCK-8检测显示,15μmol/L、30μmol/L、60μmol/L、120μmol/L、240μmol/L DADS处理后,呈浓度依赖性抑制K562细胞增殖,抑制率分别为32.48%、59.34%、66.42%、77.06%、81.05%(P<0.05)。对照组与Tween80组无抑制作用(P>0.05)。细胞计数结果显示,30μmol/L、60μmol/L与120μmol/L DADS处理K562细胞后,群体倍增时间分别为22.71±0.29、36.69±0.93与73.02±0.87呈浓度依赖性增加(P<0.05),而Tween80组与对照组无明显差异(P>0.05)。流式细胞术检测显示,60μmol/L与120μmol/L DADS作用K562细胞24 h与48 h后,G_(2)/M期百分率分别增加到17.6%与28.5%和18.6%与34.4%,较对照组有显著性差异(P<0.05)。60μmol/L DADS作用K562细胞1 h、2 h、4 h、8 h和24 h后,PCNA表达呈时间依赖性表达下调(P<0.05)。p-Chk1表达呈时间依赖性上调(P<0.05),而Chk1、Chk2与p-Chk2表达无明显差异(P>0.05)。并且,Cdc25C、CyclinB1和CDK1分别呈时间依赖性下调(P<0.05),但是,14-3-3蛋白无明显改变(P>0.05)。结论:DADS可磷酸化Chk1通过Cdc25C/CyclinB1/CDK1通路抑制K562细胞增殖与阻滞G_(2)/M期。 展开更多
关键词 二烯丙基二硫 白血病K562细胞 增殖 g_(2)/m阻滞 Chk1磷酸化 Cdc25C/CyclinB1/CDK1通路
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RRM2通过干扰前列腺癌细胞G2/M周期促进肿瘤进展 被引量:1
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作者 周亮 潘玉龙 +3 位作者 乔超 陈永江 卓晖 李强 《现代泌尿外科杂志》 CAS 2023年第4期351-358,共8页
目的探讨RRM2基因对前列腺癌的影响及机制。方法下载TCGA前列腺癌表达谱数据,分析RRM2基因与前列腺癌临床病理的相关性及生存预后情况;前列腺癌组织芯片(55例)及良性组织标本(38例)进行免疫组化染色验证RRM2在前列腺癌组织中的表达情况... 目的探讨RRM2基因对前列腺癌的影响及机制。方法下载TCGA前列腺癌表达谱数据,分析RRM2基因与前列腺癌临床病理的相关性及生存预后情况;前列腺癌组织芯片(55例)及良性组织标本(38例)进行免疫组化染色验证RRM2在前列腺癌组织中的表达情况;生物信息学方法了解RRM2对前列腺癌影响的生物学过程;进一步通过Western blot(WB)、流式细胞术验证RRM2影响前列腺癌进程的生物学过程。结果TCGA数据库和免疫组化结果显示RRM2在前列腺癌中上调表达,且其表达关系和前列腺癌临床分期、病理分级、转移正相关(P<0.05)。高表达RRM2预示患者较差的生存预后。生物信息学显示RRM2共表达正相关基因主要涉及细胞周期通路、嘧啶核苷酸代谢、RNA转运等生物学过程,其中细胞周期途径显著富集。RRM2和细胞周期CDK1、PCNA分子相关性较高。WB实验结果显示干扰RRM2后可减少前列腺癌DU145和LNCap细胞系CDK1和PCNA蛋白表达;流式细胞术实验显示干扰RRM2后前列腺癌DU145和LNCap细胞周期阻滞在G2/M期。结论RRM2干扰前列腺癌细胞G2/M周期,促进了肿瘤进展。 展开更多
关键词 前列腺癌 RRm2 细胞周期g2/m CDK1 PCNA
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一种兼容5G模块和SSD的M.2 KEY B接口设计 被引量:1
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作者 张绮文 蔡阳 +1 位作者 庞观士 陈志列 《机电工程技术》 2023年第6期254-256,共3页
为解决M.2 KEYB接口兼容性、减少板内空间的问题,根据M.2 KEYB的规范,分析每个PIN定义的信号特性,使USB3.0信号和SATA信号互不干涉,对USB3.0模块和SATA模块与M.2 KEYB接口的兼容性开展设计。检测M.2 KEYB接口接入模块类型,根据检测模块... 为解决M.2 KEYB接口兼容性、减少板内空间的问题,根据M.2 KEYB的规范,分析每个PIN定义的信号特性,使USB3.0信号和SATA信号互不干涉,对USB3.0模块和SATA模块与M.2 KEYB接口的兼容性开展设计。检测M.2 KEYB接口接入模块类型,根据检测模块的类型切换接口的工作电压。利用基本输入输出系统配置一个GPIO信号控制M.2 KEYB接口的供电电压,当接入USB3.0模块时,设计GPIO为高电平,供电电压为3.3 V;当接入SATA模块时,设计GPIO为低电平,供电电压为3.6 V。采用5G模块试验对USB3.0模块进行论证,SATA模块用固态硬盘进行验证。结果表明:所提出的M.2 KEYB接口设计方法,能够很好地兼容USB3.0模块和SATA模块。 展开更多
关键词 m.2 KEYB BIOS 5g 固态硬盘
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基于TCGA数据库的肺腺癌G2/M检查点基因预后模型的建立与应用
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作者 周而乐 佟美辰 +3 位作者 崔敏 苏娜娜 李红 曹璋 《滨州医学院学报》 2023年第2期88-94,共7页
目的基于癌症基因组图谱(TCGA)数据库建立肺腺癌(LUAD)的G2/M检查点相关基因风险预后模型。方法通过TCGA数据库获取并整合了LUAD基因表达数据及临床数据,根据Reactome定义的G2/M检查点相关基因集筛选出影响预后的G2/M检查点相关基因,通... 目的基于癌症基因组图谱(TCGA)数据库建立肺腺癌(LUAD)的G2/M检查点相关基因风险预后模型。方法通过TCGA数据库获取并整合了LUAD基因表达数据及临床数据,根据Reactome定义的G2/M检查点相关基因集筛选出影响预后的G2/M检查点相关基因,通过单因素和多因素COX分析建立风险预后模型,对模型高、低风险组进行生物学标志基因集和KEGG通路富集的差异分析并进行免疫相关性分析。结果预后模型由7个基因组成,该模型生存预测性能的AUC值为0.726。高风险组的总体生存率明显低于低风险组(P<0.05)。细胞增殖的相关通路在高风险组中富集。风险评分的增高与多种免疫细胞的浸润比例存在一定相关性(P<0.05)。结论由7个基因组成的风险预测模型可作为独立预测因子来有效预测LUAD的预后。 展开更多
关键词 肺腺癌 g2/m检查点相关基因 预后 癌症基因组图谱
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Intrinsic apoptotic pathway and G2/M cell cycle arrest involved in tubeimoside I-induced EC109 cell death 被引量:13
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作者 Yang Xu Guanghui Wang +5 位作者 Quancheng Chen Ting Lin Zhiping Zeng Qiang Luo Jie Liu Cuiling Sun 《Chinese Journal of Cancer Research》 SCIE CAS CSCD 2013年第3期312-321,共10页
Objective: Squamous esophageal carcinoma is highly prevalent in developing countries, especially in China. Tu Bei Mu (TBM), a traditional folk medicine, has been used to treat esophageal squamous cell carcinoma (E... Objective: Squamous esophageal carcinoma is highly prevalent in developing countries, especially in China. Tu Bei Mu (TBM), a traditional folk medicine, has been used to treat esophageal squamous cell carcinoma (ESCC) for a long term. tubeimoside I (TBMS1) is the main component of TBM, exhibiting great anticancer potential. In this study, we investigated the mechanism of TBMS1 cytotoxic effect on EC109 cells. Methods: Comparative nuclear proteomic approach was applied in the current study and we identified several altered protein spots. Further biochemical studies were carried out to detect the mitochondrial membrane potential, cell cycle and corresponding proteins' expression and location. Results: Subcellular proteomic study in the nucleus from EC109 cells revealed that altered proteins were associated with mitochondrial function and cell proliferation. Further biochemical studies showed that TBMSl-induced molecular events were related to mitochondria-induced intrinsic apoptosis and P21-cyclin B 1/cdc2 complex-related G2/M cell cycle arrest. Conclusions: Considering the conventional application of TBM in esophageal cancer, TBMS1 therefore may have a great potential as a chemotherapeutic drug candidate for ESCC. 展开更多
关键词 Anticancer drug g2/m cell cycle arrest intrinsic apoptosis subcellular proteomics and tubeimoside I(TBmS 1)
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p53 upregulated by HIF-la promotes hypoxiainduced G2/M arrest and renal fibrosis in vitro and in vivo 被引量:21
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作者 Limin Liu Peng Zhang +10 位作者 Ming Bai Lijie He Lei Zhang Ting Liu Zhen Yang Menglu Duan Minna Liu Baojian Liu Rui Du Qi Qian Shiren Sun 《Journal of Molecular Cell Biology》 SCIE CAS CSCD 2019年第5期371-382,共12页
Hypoxia plays an important role in the genesis and progression of renal fibrosis.The underlying mechanisms, however, have not been sufficiently elucidated. We examined the role of p53 in hypoxia-induced renal fibrosis... Hypoxia plays an important role in the genesis and progression of renal fibrosis.The underlying mechanisms, however, have not been sufficiently elucidated. We examined the role of p53 in hypoxia-induced renal fibrosis in cell culture (human and rat renal tubular epithelial cells) and a mouse unilateral ureteral obstruction (UUO) model. Cell cycle of tubular cells was determined by flow cytometry, and the expression of profibrogenic factors was determined by RT-PCR, immunohistochemistry, and western blotting. Chromatin immunoprecipitation and luciferase reporter experiments were performed to explore the effect of HIF-lα on p53 expression. We showed that, in hypoxic tubular cells, p53 upregulation suppressed the expression of CDK1 and cyclins Bl and DI, leading to cell cycle (G2/M) arrest (or delay) and higher expression of TGF-β, CTGF, collagens, and fibronectin. p53 suppression by siRNA or by a specific p53 inhibitor (PIF-α) triggered opposite effects preventing the G2/M arrest and profibrotic changes. In vivo experiments in the UUO model revealed similar antifibrotic results following intraperitoneal administration of PIF-α(2.2 mg/kg). Using gain-of-function, loss-of-function, and luciferase assays, we further identified an HRE3 region on the p53 promoter as the HIF-lα-binding site. The HIF-la-HRE3 binding resulted in a sharp transcriptional activation of p53. Collectively, we show the presence of a hypoxia-activated, p53-responsive profibrogenic pathway in the kidney. During hypoxia, p53 upregulation induced by HIF-la suppresses cell cycle progression, leading to the accumulation of G2/M cells, and activates profibrotic TGF-β and CTGF-mediated signaling pathways, causing extracellular matrix production and renal fibrosis. 展开更多
关键词 renal tubulointerstitial FIBROSIS HYPOXIA cell cycle (g2/m) arrest P53 HIF-lα TgF-β
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2(±)-7,8,3',4',5'-Pentamethoxyflavan induces G2/M phase arrest and apoptosis in human leukemia HL60 cells
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作者 TAI Wen-jiao1,LI Yan-chun1,LI Te1,ZHANG Wei-ge2,MA En-long1(1.Department of Pharmacology,Shenyang Pharmaceutical University,Shenyang 110016,China 2.Departmemt of Medicinal Chemistry,Shenyang Pharmaceutical University,Shenyang 110016,China) 《沈阳药科大学学报》 CAS CSCD 北大核心 2008年第S1期78-79,共2页
Objective Flavans are a set of naturally occurring flavonoids possessing a 2-phenylchroman nucleus,which are widely distributed in the plant kingdom.A number of flavan compounds exhibit antitumor activities.In our pre... Objective Flavans are a set of naturally occurring flavonoids possessing a 2-phenylchroman nucleus,which are widely distributed in the plant kingdom.A number of flavan compounds exhibit antitumor activities.In our previous report,a straightforward synthetic procedure for 2(±)-7,8,3',4',5'-pentamethoxyflavan(PMF)was developed.To be more important,PMF showed growth inhibitory effect on various human tumor cell lines,especially against HL60 cells.In the present study,we aim to investigate the molecular mechanisms of action of PMF in HL60 cells.This is the first report of the molecular mechanisms on anti-tumor effect of flavan compounds.Methods Trypan blue exclusion experiment was used for cell growth inhibition assay.Cell apoptosis,cell cycle distribution and the mitochondrial membrane potential(MMP)were assessed by flowcytometric analysis after AO/EB,PI and Rh123 flurescence staining,respectively.Cell cycle-and apoptosis-related proteins were detected using western blotting analysis.Results PMF(1-30 μM)inhibited the growth of HL60 cells in a time-and concentration-dependent manner.Antiproliferative effect of PMF on HL60 cells was associated with G2/M cell cycle arrest,which was mediated by regulating the expression of p21,Cdc25C and cyclin A proteins and inhibiting the phosphorylation of Cdc2 at Thr161.The prolonged PMF treatment also induced apoptosis of HL60 cells,which was characterized by DNA fragmentation,cleavage of poly(ADP-ribose)polymerase,caspase-3,caspase-8 and caspase-9,changes of Bcl-2 and Bax expression and a decrease in the mitochondrial membrane potential(MMP).Furthermore,caspase-3 inhibitor,not caspase-8 inhibitor and caspase-9 inhibitor,completely blocked PMF-caused apoptosis.Conclusions PMF inhibited the growth of HL60 cells via induction of G2/M arrest and apoptosis.Blockade of cell cycle was associated with the downregulation of Cdc2 complex activity.Both death receptor and mitochondrial apoptotic pathways explained PMF-caused apoptosis. 展开更多
关键词 flavan g2/m arrest APOPTOSIS DEATH receptor mITOCHONDRIA
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Cucurbitacin E inhibits the proliferation of hepatoma cells in vitro and in vivo through induction of G2/M phase arrest
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作者 LI Yan-chun1,MA En-long1,DENG Yi-hui2,JING Yong-kui3(1.Department of Pharmacology,Shenyang Pharmaceutical University,Shenyang 110016,China 2.Department of Pharmaceutics,Shenyang Pharmaceutical University,Shenyang 110016,China 3.Department of Medicine,Mount Sinai School of Medicine,New York,USA) 《沈阳药科大学学报》 CAS CSCD 北大核心 2008年第S1期77-78,共2页
Objective Cucurbitacins are the highly oxygenated tetracyclic triterpenes,which are predominantly found in the Cucurbitaceae family but are also present in several other families of the plant kingdom.A number of compo... Objective Cucurbitacins are the highly oxygenated tetracyclic triterpenes,which are predominantly found in the Cucurbitaceae family but are also present in several other families of the plant kingdom.A number of compounds of this group have been investigated for their cytotoxic,hepatoprotective,anti-inflammatory,cardiovascular and anti-diabetic activities.In China,the cucurbitacin preparation,which contains mostly cucurbitacin B and cucurbitacin E,has been clinically used for the treatment of the primary liver carcinoma.It has been previously reported that cucurbitacin E could produce cytotoxicity against a variety of cancer cells,and various mechanisms were implicated in its cytotoxic effect.The present study is to investigate the effect of cucurbitacin E on hepatoma cells in vitro and in vivo and to study their potential mechanisms of action.Methods The MTT assay was used to assess the viability of human HepG2 and BEL7402 hepatoma cells in vitro after treatment with different concentrations of cucurbitacin E.The cell cycle distribution was determined by flowcytometric analysis after propidium iodide(PI)staining.The cell cycle-related proteins were detected using western blotting analysis.Implanted mouse hepatoma H22 model was built to evaluate the growth inhibitory effect of cucurbitacin E in vivo in mice.Results Our studies found that cucurbitacin E(10-300 nM)produced anti-proliferative effect on human HepG2 and BEL7402 hepatoma cells in vitro without cytotoxicity.According to flowcytometric analysis,cucurbitacin E arrested the cell cycle at G2/M phase in both HepG2 and BEL7402 hepatoma cells after 24 h treatment.Cucurbitacin E induced the decrease in the level of CDK1 protein and the increase in the level of p21 protein,but had no effect on the levels of cyclin A,cyclin B1 and Cdc25C protein.In in vivo anti-tumor experiment,cucurbitacin E had significant inhibitory effects on the growth of mouse H22 hepatoma cells.Conclusions Cucurbitacin E inhibited the proliferation of hepatoma cells in vitro and in vivo,at least in part,through induction of cell cycle arrest at G2/M phase,which was mediated by concomitant upregulation of p21 and downregulation of CDK1.We consider that cucurbitacin E may be useful in the treatment of liver cancer. 展开更多
关键词 CUCURBITACIN e HEPATOmA cells g2/m arrest
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Z-Guggulsterone alleviated renal fibrosis and G_(2)/M cycle arrest through Klotho/P53 signaling
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作者 LIU Min-na LIU Tian-long 《中国药理学与毒理学杂志》 CAS 北大核心 2021年第10期767-768,共2页
OBJECTIVE Chronic kidney disease(CKD)has become a global public health problem with 10%-15%incidence rate,and inhibiting the renal interstitial fibrosis is considered to be a potential strategy to delay the progressio... OBJECTIVE Chronic kidney disease(CKD)has become a global public health problem with 10%-15%incidence rate,and inhibiting the renal interstitial fibrosis is considered to be a potential strategy to delay the progression of CKD.Z-Guggulsterone(Z-GS),an active compound from derived from Commiphora mukul,has been proved to be effective in various diseases.The present study aimes to determine the protective effect and the molecular mechanism of Z-GS on renal fibrosis.METHODS Unilateral ureteral obstruction(UUO)mice and hypoxia-induced HK-2 cells were used to simulate renal fibrosis in vitro and in vivo,respectively.The mice and cells were treated with different doses of Z-GS to observe the pharmacological action.Renal function,including Scr,BUN,and UA,were detected by commercial kits.H&E and Masson staining were performed to observe histopathological changes of kidney.Cell viability and LDH release of HK-2 cells were detected by commercial kits.Cell cycle distribution and apoptosis rate were analyzed by flow cytometry.Fibrosis markers were detected by immunohistochemistry and immunofluorescence analysis.Cell cycle related proteins and Klotho/p53 signaling were analyzed by Western blotting.RESULTS The results showed that Z-GS decreased the rise of Scr,BUN,and UA and lightened renal histopathological injury,which were induced by UUO.Besides,Z-GS administration alleviated renal fibrosis in mice by inhibiting the expressions ofα-SMA,TGF-βand collagenⅣ,and delayed G2/M cell cycle arrest by promoting the expressions of CDK1 and cyclinD1/B1 rate.Experiments in vitro indicated that Z-GS treatment significantly increased the cell viability while decreased the LDH release in hypoxia-induced HK-2 cells.In addition,hypoxia induced fibrosis and G2/M cycle arrest in HK-2 cells were retarded by Z-GS.The study of its possible mechanism exhibited that Z-GS treatment increased the level of Klotho and inhibited P53 level.Nevertheless,the effect of Z-GS on Klotho/P53 signaling was reversed by siRNA-Klotho.Moreover,siRNA-Klotho treatment eliminated the effects of Z-GS on G2/M cell cycle arrest and fibrosis.CONCLUSION This study clarified that Z-GS alleviated renal fibrosis and G2/M cycle arrest through Klotho/P53 signaling pathway.People who have suffered CKD may potentially benefit from treatment with Z-GS. 展开更多
关键词 chronic kidney disease renal interstitial fibrosis Z-guggulsterone g2/m cycle arrest Klotho/P53 signaling
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蛋白酶体抑制剂MG132诱导HL-60细胞凋亡前G_2/M期阻滞及机制 被引量:12
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作者 孙国敬 钱俊杰 +5 位作者 孟祥兵 宋宜 张枫 梅柱中 董燕 孙志贤 《癌症》 SCIE CAS CSCD 北大核心 2004年第10期1144-1148,共5页
背景和目的:蛋白酶体(proteasome)抑制剂能够诱导多种肿瘤细胞凋亡,是一种潜在的有应用前景的抗肿瘤剂。本研究旨在探讨蛋白酶体抑制剂MG132(Z-Leu-Leu-Leu-CHO)诱导白血病细胞HL-60凋亡和G2/M期阻滞的机制。方法:采用荧光显微镜观察、... 背景和目的:蛋白酶体(proteasome)抑制剂能够诱导多种肿瘤细胞凋亡,是一种潜在的有应用前景的抗肿瘤剂。本研究旨在探讨蛋白酶体抑制剂MG132(Z-Leu-Leu-Leu-CHO)诱导白血病细胞HL-60凋亡和G2/M期阻滞的机制。方法:采用荧光显微镜观察、流式细胞术和免疫印迹研究测定MG132诱导HL-60细胞凋亡和周期阻滞及机制。结果:2μmol/L的MG132能够有效地诱导HL-60细胞凋亡,用药后24h就显现有细胞凋亡;在MG132诱导HL-60细胞凋亡出现之前有一个明显的G2/M期阻滞,加MG132后12h时G2/M期时相百分比为63.42±2.02;24h时加MG132组细胞凋亡为16.67±1.48,与对照组G2/M期时相百分比为7.29±3.01及细胞凋亡为0相比,两者之间有显著性差别(P<0.01);咖啡因CAF能够减少MG132诱导HL-60细胞出现的G2/M期阻滞,同时也减少凋亡细胞的比例;细胞周期检查点的负调控因子p21waf/cip1蛋白在加MG132处理后3h有明显的表达,但并未能检测到p53和p27蛋白。结论:MG132诱导HL-60细胞凋亡之前有一个明显的G2/M期阻滞,p21蛋白表达明显上调提示:是p21waf/cip1而不是p53或其同源蛋白参与了其中的调控。 展开更多
关键词 HL-60细胞 g2/m期阻滞 诱导 细胞凋亡 蛋白酶体抑制剂 P21蛋白 表达 负调控因子 荧光显微镜 凋亡细胞
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Gadd45介导抑癌基因BRCA1诱导的G_2/M期阻滞 被引量:8
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作者 宋咏梅 童彤 +4 位作者 付明 董立佳 金顺钱 吴旻 詹启敏 《癌症》 SCIE CAS CSCD 北大核心 2004年第5期517-521,共5页
背景与目的:目前已经肯定,抑癌基因BRCA1是细胞周期监测点调控的重要因子,但BRCA1在细胞周期阻滞中的作用机制尚不完全清楚。本研究的目的是探讨Gadd45在BRCA1诱导的细胞周期阻滞中所起的作用。方法:应用转染、流式细胞仪细胞筛选(分选)... 背景与目的:目前已经肯定,抑癌基因BRCA1是细胞周期监测点调控的重要因子,但BRCA1在细胞周期阻滞中的作用机制尚不完全清楚。本研究的目的是探讨Gadd45在BRCA1诱导的细胞周期阻滞中所起的作用。方法:应用转染、流式细胞仪细胞筛选(分选)、Westernblot检测分析BRCA1诱导Gadd45的表达;利用CAT酶活性测定的方法检测外源BRCA1对Gadd45启动子所起作用;以流式细胞周期分析方法检测反义Gadd45转染对BRCA1诱导的细胞G2/M期阻滞的影响;采用细胞生长集落形成分析反义Gadd45转染HeLa、HCT116细胞在BRCA1诱导的细胞生长抑制过程所起的作用。结果:外源转染BRCA1可诱导Gadd45蛋白的表达;BRCA1激活Gadd45启动子的转录;反义Gadd45可显著阻遏BRCA1诱导细胞G2/M期阻滞;反义Gadd45转染可明显降低BRCA1对HeLa、HCT116细胞集落形成的抑制作用。结论:Gadd45作为BRCA1的下游调控基因,在BRCA1诱导的细胞G2/M期阻滞过程和生长抑制中起介导作用。 展开更多
关键词 gadd45介导 抑癌基因 BRCAl诱导 g2/m期阻滞 作用机制
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二烯丙基二硫化物诱导G2/M期阻滞对卵巢癌细胞增殖和凋亡的影响 被引量:9
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作者 张瑞涛 史惠蓉 +2 位作者 任芳 刘哲颖 姬鹏程 《中国医学科学院学报》 CAS CSCD 北大核心 2019年第1期43-52,共10页
目的探讨二烯丙基二硫化物(DADS)诱导G2/M期阻滞对卵巢癌细胞增殖和凋亡的影响及其可能的分子机制。方法将不同浓度的DADS分别处理卵巢癌SK-OV-3和OVCAR-3细胞,采用MTT法检测细胞增殖活性,流式细胞术检测细胞凋亡率,裸鼠移植模型观察体... 目的探讨二烯丙基二硫化物(DADS)诱导G2/M期阻滞对卵巢癌细胞增殖和凋亡的影响及其可能的分子机制。方法将不同浓度的DADS分别处理卵巢癌SK-OV-3和OVCAR-3细胞,采用MTT法检测细胞增殖活性,流式细胞术检测细胞凋亡率,裸鼠移植模型观察体内抑瘤效果。进而应用流式细胞术检测细胞周期分布的变化,Western blot检测细胞中G2/M检验点相关信号通路、增殖和凋亡相关蛋白的表达。结果 MTT法检测显示,不同浓度的DADS作用SK-OV-3 (F=247. 86,P=0. 000)和OVCAR-3细胞(F=302. 54,P=0. 000)后,随着DADS浓度增高,细胞增殖抑制率明显升高,呈浓度依赖性。DADS处理24 h时SK-OV-3 (F=335. 12,P=0. 000)和OVCAR-3细胞(F=347. 43,P=0. 000)的增殖抑制率明显高于处理12 h和48 h时的细胞抑制率,呈明显的时间依赖性。流式细胞术检测结果显示,不同浓度的DADS作用SK-OV-3、OVCAR-3细胞后,随着DADS浓度的增高,细胞凋亡率明显升高,呈明显的浓度依赖性(P <0. 05)。DADS处理24 h时SK-OV-3和OVCAR-3细胞的凋亡率明显高于处理12和48 h时,呈明显的时间依赖性(P <0. 05)。与空白处理组相比,腹腔注射DADS溶液可明显抑制卵巢癌细胞的裸鼠移植瘤体积(F=548. 23,P=0. 000; F=311. 84,P=0. 000)。将30 mg/L的DADS作用于SK-OV-3和OVCAR-3细胞24 h后,与空白处理细胞相比,DADS处理后的SK-OV-3和OVCAR-3细胞中处于G2期的细胞百分率明显增加(F=375. 11,P=0. 000; F=256. 48,P=0. 000)。将30 mg/L DADS分别作用于SK-OV-3和OVCAR-3细胞24 h后,p-Chk1 (ser345)(F=108. 89,P=0. 013; F=97. 58,P=0. 018)、p-CDC25C (ser216)(F=87. 25,P=0. 025; F=114. 25,P=0. 009)、p-P53 (ser15)(F=112. 41,P=0. 011; F=255. 87,P=0. 000)、P21WAF1 (F=246. 38,P=0. 001; F=141. 36,P=0. 005)和p-CDK1 (Thr14/Tyr15)蛋白(F=298. 12,P=0. 000; F=233. 15,P=0. 000)的表达明显增加,CDK1 (F=308. 24,P=0. 000; F=257. 55,P=0. 000)和Cyclin B1蛋白(F=223. 15,P=0. 001; F=241. 28,P=0. 000)的表达明显减少,增殖和凋亡相关蛋白PCNA (F=77. 36,P=0. 031; F=157. 28,P=0. 001)、Ki-67 (F=205. 64,P=0. 007; F=315. 22,P=0. 000)和Survivin蛋白(F=122. 13,P=0. 013; F=188. 24,P=0. 000)表达明显减少,Cleaved-caspase3蛋白表达明显增加(F=86. 46,P=0. 023; F=99. 11,P=0. 009)。结论 DADS可抑制卵巢癌细胞增殖,诱导其凋亡;其分子机制可能与G2/M检验点Chk1-CDC25C和P53-P21WAF1通路激活、CDK1活性降低、CDK1和CyclinB1蛋白表达减少,最终导致卵巢癌细胞G2/M期阻滞有关。 展开更多
关键词 二烯丙基二硫化物 卵巢上皮性癌 g2/m期阻滞 增殖 凋亡
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DADS通过Chk1/Cdc25C/CyclinB1/CDK1通路诱导白血病HL-60细胞G2/M期阻滞 被引量:9
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作者 吉晓霞 曾颖 +5 位作者 何洁 谭晖 易岚 黄卫国 伍尤华 苏琦 《中国药理学通报》 CAS CSCD 北大核心 2015年第2期221-226,共6页
目的研究二烯丙基二硫(diallyl disulfide,DADS)诱导人白血病HL-60细胞周期阻滞及其分子机制。方法采用细胞计数、软琼脂克隆形成实验及流式细胞术观察DADS对HL-60细胞生长抑制与周期阻滞效应。Western blot检测DADS对HL-60细胞Chk1/2... 目的研究二烯丙基二硫(diallyl disulfide,DADS)诱导人白血病HL-60细胞周期阻滞及其分子机制。方法采用细胞计数、软琼脂克隆形成实验及流式细胞术观察DADS对HL-60细胞生长抑制与周期阻滞效应。Western blot检测DADS对HL-60细胞Chk1/2以及下游分子的影响。结果细胞计数显示,60、120μmol·L-1DADS处理后,其群体倍增时间从19.14 h增加到35.03、71.82 h(P<0.05)。软琼脂克隆形成实验表明,30、60、90、120μmol·L-1DADS对HL-60细胞克隆形成率的抑制率分别为35.06%、62.10%、93.79%、99.35%(P<0.05)。流式细胞术检测显示,60和120μmol·L-1DADS分别作用HL-60细胞24 h后,DADS可呈时间与浓度依赖性诱导HL-60细胞G2/M期阻滞(P<0.05)。60μmol·L-1DADS处理HL-60细胞后,p-Chk1可呈时间依赖性上调(P<0.05),而Chk1与Chk2总蛋白和pChk2无改变(P>0.05)。并且,Cdc25C、CyclinB 1和CDK1分别呈时间依赖性下调(P<0.05),但14-3-3蛋白表达没有改变(P>0.05)。结论 DADS能够抑制HL-60细胞增殖,并通过Chk1/Cdc25C/CyclinB 1/CDK1通路阻滞HL-60细胞于G2/M期。 展开更多
关键词 二烯丙基二硫 人白血病HL-60细胞 增殖抑制 g2/m期阻滞 Chkl/cdc25c/cyclinBl/cDKl通路 分子机制
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与细胞周期G_2/M期进程相关的H2AX磷酸化 被引量:7
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作者 涂文志 尚增甫 +5 位作者 李兵 刘晓丹 王豫 徐勤枝 让蔚清 周平坤 《中国生物化学与分子生物学报》 CAS CSCD 北大核心 2012年第4期339-345,共7页
γH2AX焦点(foci)被普遍当做DNA双链断裂(DSB)损伤的分子标志物.为探讨细胞周期进程相关的H2AX磷酸化规律特征,采用胸腺嘧啶双阻滞结合噻氨酯哒唑(nocodazole)的后续处理,将HeLa细胞同步于有丝分裂的前中期.然后,用流式细胞仪检测细胞... γH2AX焦点(foci)被普遍当做DNA双链断裂(DSB)损伤的分子标志物.为探讨细胞周期进程相关的H2AX磷酸化规律特征,采用胸腺嘧啶双阻滞结合噻氨酯哒唑(nocodazole)的后续处理,将HeLa细胞同步于有丝分裂的前中期.然后,用流式细胞仪检测细胞周期、Western印迹和免疫荧光法,观察γH2AX表达和γH2AX焦点的形成.结果显示,细胞进入G2/M期和有丝分裂过程中,γH2AX水平显著增加;在无DNA DSB发生的情况下,部分M期细胞中也存在大量的γH2AX焦点.随着细胞完成有丝分裂从M期退出再进入G1期,γH2AX的表达水平逐渐降低.这种γH2AX表达变化特征与G2/M期密切关联的PLK1和Cyclin B1的表达规律相类似.在4 Gy大剂量照射下,HeLa细胞于照后8到12 h出现明显的G2/M期阻滞.γH2AX焦点数在照后1 h达高峰,随后降低,照后8 h又上升,出现了第2个峰值.与之不同的是,在1 Gy低剂量照射下,细胞的G2/M期阻滞微弱,γH2AX焦点数在照后0.5 h最高,随后下降,且无反弹,符合DNA DSB的修复动力学特征.因此,将γH2AX当做DNA DSB分子标志物时,还需要考虑细胞周期变化的影响.γH2AX适合作为1 Gy以下照射的DNA双链断裂损伤的分子标志. 展开更多
关键词 γH2AX 细胞周期 g2/m阻滞 DNA双链断裂 分子标志物
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二烯丙基二硫对人胃癌MGC803细胞G2/M期检查点Chk1与Chk2的影响 被引量:5
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作者 陆丽峰 苏波 +5 位作者 姜浩 戴文香 向姝霖 唐海林 凌晖 苏琦 《中国药理学通报》 CAS CSCD 北大核心 2013年第1期79-84,共6页
目的研究二烯丙基二硫(diallyl disulfide,DADS)对人胃癌MGC803细胞G2/M期检查点Chk1与Chk2的影响。方法流式细胞术检测细胞周期改变;Northern blot、Westernblot与免疫细胞化学检测DADS处理MGC803细胞的Chk1与Chk2表达。结果流式细胞... 目的研究二烯丙基二硫(diallyl disulfide,DADS)对人胃癌MGC803细胞G2/M期检查点Chk1与Chk2的影响。方法流式细胞术检测细胞周期改变;Northern blot、Westernblot与免疫细胞化学检测DADS处理MGC803细胞的Chk1与Chk2表达。结果流式细胞术分析显示,30 mg.L-1DADS呈时间依赖性阻滞MGC803细胞在G2/M期(P<0.05);Northern blot检测表明,DADS不同时间作用MGC803细胞后,Chk1与Chk2 mRNA表达与未处理组差异无显著性(P>0.05);免疫细胞化学发现Chk1与Chk2表达与未处理组无明显改变(P>0.05);Western blot DADS在不同时间对MGC803细胞Chk1与Chk2总蛋白表达无改变(P>0.05),而磷酸化的Chk1表达呈时间依赖性增加(P<0.05),但磷酸化的Chk2无明显改变(P>0.05)。结论 DADS阻滞MGC803细胞G2/M期与磷酸化Chk1有关。 展开更多
关键词 二烯丙基二硫 人胃癌mgC803细胞 g2/m 检查点 CHK1 CHK2
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活化Chk1引起的G_2/M期阻滞在调节K562/A02细胞耐药中的机制探讨 被引量:4
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作者 王海燕 张敏 +5 位作者 邹萍 游泳 郭静明 唐晓琼 赵智刚 吴耀辉 《中国实验血液学杂志》 CAS CSCD 2006年第6期1105-1109,共5页
本研究探讨活化的Chk1对白血病细胞周期及凋亡的影响,探究Chk1调控肿瘤细胞耐药的机制。以慢性粒细胞白血病细胞系K562及其耐药细胞系K562/A02(耐阿霉素)为研究对象,与阿霉素共孵育后,用流式细胞术检测细胞周期分布,RT-PCR检测Chk1mRNA... 本研究探讨活化的Chk1对白血病细胞周期及凋亡的影响,探究Chk1调控肿瘤细胞耐药的机制。以慢性粒细胞白血病细胞系K562及其耐药细胞系K562/A02(耐阿霉素)为研究对象,与阿霉素共孵育后,用流式细胞术检测细胞周期分布,RT-PCR检测Chk1mRNA表达水平,Westernblot检测转染前后Chk1磷酸化水平;靶向Chk1shRNA抑制细胞内Chk1的表达后,用流式细胞术检测阿霉素作用后细胞的凋亡情况。结果表明阿霉素致K562/A02细胞阻滞在G2/M期的细胞百分率为(54.12±0.57)%,显著高于K562细胞(36.99±1.28)%;Chk1mRNA表达水平在K562与K562/A02细胞间无显著差异;Chk1磷酸化水平在K562/A02细胞为0.79±0·56,在K562细胞为0.27±1·47,其差异有统计学意义。转染Chk1shRNA后,两株细胞的Chk1磷酸化水平显著下降。转染组K562、K562/A02细胞凋亡率分别是空载体转染组的1.30倍和3.84倍。结论Chk1的活化水平调控着K562/A02细胞对阿霉素的敏感性。 展开更多
关键词 CHK1 g2/m期阻滞 K562细胞 K562/A02细胞 RNA干扰 白血病细胞耐药
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刺五加多糖通过ERK信号转导途径诱导H446细胞G_2/M期阻滞 被引量:6
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作者 赵俊霞 闫永鑫 +2 位作者 王彦玲 韩硕 闫蕴力 《基础医学与临床》 CSCD 北大核心 2010年第1期59-62,共4页
目的研究刺五加多糖(ASPS)对人小细胞肺癌H446细胞G2/M期阻滞的诱导作用及对ERK信号传导途径的影响。方法流式细胞技术(FCM)检测H446细胞周期;Western blot分析检测ASPS对ERK、p-ERK蛋白的影响。结果与对照组相比,各ASPS处理组G2/M期细... 目的研究刺五加多糖(ASPS)对人小细胞肺癌H446细胞G2/M期阻滞的诱导作用及对ERK信号传导途径的影响。方法流式细胞技术(FCM)检测H446细胞周期;Western blot分析检测ASPS对ERK、p-ERK蛋白的影响。结果与对照组相比,各ASPS处理组G2/M期细胞所占的比例明显增高(P<0.01),G0/G1期细胞所占的比例没有差异;加入ERK抑制剂PD98059后,G2/M期和G0/G1期细胞所占的比例与对照组没有差异;p-ERK的量显著高于对照组(P<0.01),而对ERK蛋白表达没有明显影响。结论ASPS可能通过激活ERK信号转导途径诱导H446细胞发生G2/M期阻滞。 展开更多
关键词 刺五加多糖 小细胞肺癌H446细胞株 g2/m期阻滞 ERK P38
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葫芦素E通过诱导G_2/M周期阻滞抑制人肝癌细胞增殖 被引量:5
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作者 李艳春 张鹏飞 +3 位作者 罗杞瑜 邓意辉 马恩龙 景永奎 《沈阳药科大学学报》 CAS CSCD 北大核心 2010年第5期388-391,共4页
目的研究葫芦素E(cucurbitacin E,CuE)体外对人肝癌BEL7402和HepG2细胞的增殖抑制作用及机制。方法MTT法检测不同浓度CuE体外对BEL7402和HepG2细胞的增殖抑制作用;流式细胞仪检测CuE对细胞周期分布的影响;Western blot法检测CuE对细胞... 目的研究葫芦素E(cucurbitacin E,CuE)体外对人肝癌BEL7402和HepG2细胞的增殖抑制作用及机制。方法MTT法检测不同浓度CuE体外对BEL7402和HepG2细胞的增殖抑制作用;流式细胞仪检测CuE对细胞周期分布的影响;Western blot法检测CuE对细胞周期调节蛋白cy-clinB1、Cdc25C、Cdk1及p21表达的影响。结果CuE作用72 h可剂量依赖性地抑制BEL7402和HepG2细胞增殖;CuE(100 nmo.lL-1)作用12、24 h后可使BEL7402和HepG2细胞周期阻滞于G2/M期,并可下调Cdk1蛋白的表达,上调p21蛋白的表达。结论CuE体外可抑制人肝癌BEL7402和HepG2细胞的增殖,其增殖抑制作用与诱导G2/M周期阻滞有关。 展开更多
关键词 葫芦素E 肝癌细胞 g2/m阻滞
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