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p21基因

p21基因的相关文献在1995年到2022年内共计169篇,主要集中在肿瘤学、基础医学、畜牧、动物医学、狩猎、蚕、蜂 等领域,其中期刊论文160篇、会议论文9篇、专利文献86736篇;相关期刊105种,包括中国免疫学杂志、中华医学遗传学杂志、中华实验外科杂志等; 相关会议7种,包括第二届全国抗衰老医学大会暨首届中国干细胞与抗衰老美容高峰论坛、第七届(2016)中国鹿业发展大会、中国科协首届学术年会等;p21基因的相关文献由551位作者贡献,包括李春义、王大涛、郭倩倩等。

p21基因—发文量

期刊论文>

论文:160 占比:0.18%

会议论文>

论文:9 占比:0.01%

专利文献>

论文:86736 占比:99.81%

总计:86905篇

p21基因—发文趋势图

p21基因

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  • 李春义
  • 王大涛
  • 郭倩倩
  • 侯晓菲
  • 叶章群
  • 姜兰兰
  • 孙晓健
  • 方五旺
  • 施达仁
  • 曹岩
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 陈哲; 杨鹏霞; 雷明明; 陈佳彬; 闫乐艳
    • 摘要: 【目的】分析鹅p21基因的结构和启动子活性,探讨p21基因的转录调控机制。【方法】以泰州鹅为试验对象,通过同源克隆、RACE和生物信息学分析等方法获得鹅p21基因全长序列和5′-侧翼区序列特征;构建6个不同缺失片段的启动子区双荧光素酶报告载体并分析其荧光素酶活性,进而确定p21基因核心启动子区;对核心启动子区转录因子结合位点生肌决定因子(MyoD)(+25~+36 bp)进行定点突变,并构建突变报告基因载体,在C2C12细胞系内初步鉴定鹅p21基因核心转录调控因子。【结果】鹅p21基因cDNA全长1943 bp,CDS区大小为453 bp,编码151个氨基酸,蛋白序列包含高度保守的CDI家族结合位点。系统进化树分析表明,鹅p21基因与鸭亲缘关系最近,与鸡和火鸡有较强的进化关系。鹅p21基因5′-侧翼区包含启动子元件,-35~+37 bp是核心启动子区,发挥正向调控作用,结合定点突变技术初步鉴定MyoD是鹅p21基因核心转录调控元件。【结论】本研究获得了鹅p21基因完整的cDNA序列和启动子区域,MyoD是p21基因核心转录调控因子,为探究p21基因在鹅胚胎期肌肉发育过程中的调控机制提供理论依据。
    • 陶义丰; 黄玲莎; 刘冬华; 劳明; 黄浩; 黄文成; 谢娟
    • 摘要: 目的 探讨水蛭素对人鼻咽癌细胞(CNE2)增殖的影响及机制.方法 取对数生长期的CNE2细胞随机分为对照组与水蛭素组.对照组常规培养,水蛭素组加入不同浓度的水蛭素进行培养.倒置显微镜下观察细胞形态学变化;MTT法测算CNE2细胞生长抑制率,计算不同时间点半抑制浓度(IC 50);实时荧光定量PCR检测CNE2细胞内Bax、p21 mRNA表达.结果 不同浓度不同时间点水蛭素组生长抑制率均高于对照组,水蛭素组各浓度各时间点生长抑制率比较差异均有统计学意义(P均<0.05).药物作用24、48、72 h的IC 50分别为(8.28±2.1)、(5.11±0.7)、(4.83±0.5)ATU/mL,48、72 h时间点IC 50比24 h高(P均<0.05).与对照组比较,5、8 ATU/mL水蛭素组Bax、p21 mRNA相对表达量高(P均<0.05),8 ATU/mL水蛭素组最高(P均<0.05).结论 水蛭素可明显抑制CNE2细胞增殖,该作用可能与水蛭素上调Bax、p21 mRNA表达有关.
    • 张晓兰; 李海萍; 金艳霞; 成华; 琪美格
    • 摘要: Objective: To study the polymorphism of P21Ser31Arg in cervical tissues of Tibetan women at high altitude, and to analyze its correlation with the genetic susceptibility to cervical cancer. Methods: All the objects were selected from the patients during July 2015 to June 2016, including 200 cases of patients with cervical cancer, 100 cases of patients with cervical intraepithelial neoplasia (CIN), 100 cases of patients with cervicitis and 100 cases of patients with normal cervical. The distribution of the three genotypes (Ser/Ser, Ser/Arg and Arg/Arg) of P21Ser31Arg in cervical tissues of all groups were detected by the method of restriction fragment length polymorphism (PCR-RFLP), and the the composition differences in different groups were compared. The association of polymorphism with age, type of cancer and differentiation of cervical cancer was further analyzed. Results: Three genotypes of P21Ser31Arg in cervical tissues of the four groups were all detected, and the constituent ratio of Ser/Arg, Ser/Ser and Arg/Arg were respectively 53.38%, 34.88% and 11.75%. There was no significant difference of the distribution of three genotypes of P21Ser31Arg among the four groups and between each two groups (P>0.05). In the 200 cases of cervical cancer patients, there was no significant difference the distribution of P21Ser31Arg genotypes in different groups with various ages and types of cancer (P>0.05); and the difference of distribution of three genotypes in the groups with different differentiation was statistically significant (P<0.05). Conclusion:P21Ser31Arg polymorphism may not associated with genetic susceptibility to cervical cancer in Tibetan women at high altitude, but may be related to the degree of differentiation in cervical cancer patients.%目的:研究高海拔地区藏族妇女宫颈组织中P21Ser31Arg的多态性, 并分析其与宫颈癌遗传易感性的相关性.方法:选择2015年7月2016年6月收治的200例宫颈癌患者、100例宫颈上皮内瘤样病变 (CIN) 患者、100例宫颈炎患者及100例正常宫颈患者为研究对象, 采用限制性酶切片段长度多态性分析 (PCR-RFLP) 方法检测各组患者宫颈组织中P21Ser31Arg三种基因型Ser/Ser、Ser/Arg及Arg/Arg的分布情况并比较其构成差异, 进一步分析其多态性与宫颈癌患者年龄、癌症分型及分化程度的相关性.结果:四组患者宫颈组织中均检测到三种基因型, Ser/Arg、Ser/Ser及Arg/Arg三种基因型的构成比分别为53.38%、34.88%及11.75%.四组患者宫颈组织中P21Ser31Arg的三种基因型分布整体比较及各组两两比较, 差异均无统计学意义 (P>0.05).200例宫颈癌患者中, 不同年龄组及不同分型组患者的P21Ser31Arg基因型分布比较, 差异无统计学意义 (P>0.05);而不同分化程度组浸润性鳞癌患者的三种基因型分布比较, 差异具有统计学意义 (P<0.05).结论:未发现P21Ser31Arg多态性与高海拔地区藏族妇女宫颈癌的遗传易感性有关, 而可能与宫颈癌患者的分化程度相关.
    • 刘聪; 李贺; 孙伟静; 李宁; 高佳琪; 于泽鹏; 敬舒; 王春梅; 孙靖辉; 陈建光
    • 摘要: 目的:观察五味子乙素(schisandrin B,SCB)对D-半乳糖致衰老小鼠学习记忆能力的改善作用.方法:ICR小鼠随机分为4组,即正常对照组(灌胃蒸馏水,皮下注射生理盐水)、衰老模型组(灌胃蒸馏水,皮下注射220 mg/kg D-半乳糖)、SCB(M)组(灌胃20 mg/kg SCB,皮下注射D-半乳糖220 mg/kg)、SCB(C)组(灌胃20 mg/kg SCB,皮下注射生理盐水),连续给药7周.通过避暗实验及Morris水迷宫实验观察SCB对小鼠学习记忆能力的影响;通过WST-1法检测小鼠脑组织中超氧化物歧化酶(superoxide dismutase,SOD)活力;通过硫代巴比妥酸法检测小鼠脑组织中丙二醛(malondialdehyde,MDA)含量;通过实时定量聚合酶链式反应及Western blot法,检测小鼠脑组织中p19、p53、p21基因表达情况.结果:SCB能够明显改善D-半乳糖诱导的脑衰老小鼠的学习记忆能力,提高脑衰老小鼠脑组织中SOD活力,降低MDA水平,明显降低脑组织中的p19、p53、p21基因的表达水平.结论:SCB能够改善D-半乳糖诱导的小鼠脑衰老,该作用可能与其提高小鼠抗氧化能力及下调小鼠脑组织中p19、p53、p21基因表达水平有关.
    • 李森茂; 胡嘏; 余虓; 王少刚; 叶章群
    • 摘要: 目的 探讨微小核糖核酸miR-370-5p对前列腺癌细胞系PC3和DU145细胞增殖的影响.方法 将前列腺癌细胞系PC3和DU145分为2组:阴性对照组-转染随机序列(dsCon-trol);实验组-转染miR-370-5p或miR-370-5p+siP21.实时荧光定量聚合酶链反应(qPCR)检测各组细胞中p21 mRNA的表达及前列腺癌细胞系中miR-370-5p的基础表达情况;蛋白质印迹法检测p21蛋白的表达;集落形成实验检测各组单个细胞克隆增殖情况;细胞增殖实验检测转染后各组细胞的增殖能力.结果 与正常前列腺上皮细胞(RWPE-1)比较,前列腺癌细胞系PC3和DU145中miR-370-5p表达下降;与阴性对照组相比,实验组PC3和DU145细胞中p21 mRNA的相对表达量分别提高了(2.457±0.392)倍和(1.844±0.295)倍.实验组PC3和DU145细胞中p21蛋白的相对表达分别为(0.52±0.09)和(0.63±0.14),阴性对照组为(0.18±0.06)和(0.24±0.05),两组比较,差异有统计学意义(P<0.05).阴性对照组和实验组中PC3和DU145细胞的集落形成数目分别为(0.281±0.024)、(0.084±0.016)、(0.293±0.017)和(0.310±0.041)、(0.088±0.019)、(0.300±0.032),实验组在转染miR-370-5p后,细胞集落形成数目均较阴性对照组少;而在miR-370-5p+siP21共转染后,与转染miR-370-5p组相比较,PC3和DU145细胞集落形成数目均显著恢复,差异均有统计学意义(P<0.05).细胞增殖实验结果显示,实验组转染miR-370-5p后,PC3和DU145细胞在48、72、96 h的存活情况(用吸光度OD值表示)分别为(0.395±0.040)、(0.691±0.042)、(0.874±0.045)和(0.437±0.044)、(0.700±0.051)、(0.875±0.052),与阴性对照组相比,实验组细胞增殖能力明显下降(P<0.05);miR-370-5p+siP21共转染后48、72、96 h,PC3和DU145细胞的OD值分别为(0.675±0.041)、(1.072±0.124)、(1.323±0.136)和(0.633±0.106)、(1.072±0.167)、(1.337±0.102),与转染miR-370-5p比较,差异均有统计学意义(P<0.05).结论 miR-370-5p能够通过上调p21蛋白的表达抑制前列腺癌细胞的增殖.%Objective To study the effects of a synthetic miR-370-5p mimics onprostate cancer cell lines of PC3 and DU145 in vitro. Methods PC3 and DU145 cells were cultured in vitro and treated with two different processing:negative control group (infection with dsControl)and the ex-perimental group (infection with miR-370-5p or miR-370-5p+siP21)from November 2016 to April 2017.Real-time fluorescent quantitative PCR (qPCR)was performed to detect the expression of p21 mRNA and the expression of miR-370-5p in prostate cancer cell lines.Western Blot method was con-ducted to evaluate the expression of p21 protein.Colony formation assay was used to test the ability of single cancer cell clone proliferation.Cell proliferation assay (CCK-8)was implemented to be ob-served the inhibitive effect of cell proliferative potential. Results Result of qPCR showed that, compared with normal prostate epithelial cell (RWPE-1),miR-370-5p decreased in PC3 and DU145;the relative expression of p21 messenger in PC3 and DU145 cells in the experimental group was sig-nificantly (2.457±0.392)times and (1.844±0.295)times higher than that in the negative control group respectively.Western Blot analysis testified that the expressions of p21 in PC3 and DU145 cells were respectively (0.52±0.09)and (0.63±0.14),the difference was statistically significant between two groups (P <0.05).Cell colony formation assay certified that the colony for-mation rates were (0.084±0.016)and (0.088 ±0.019)in the negative control group,less than in that of miR-370-5p group (0.281±0.024)and (0.310 ±0.041 )(P <0.05 );however,the colony formation rates were (0.293 ±0.017)and (0.300 ± 0.032)in the groups of miR-370-5p+siP21,restored in that of miR-370-5p group (P <0.05).Cell proliferation assay demon-strated that,when detected at 48,72,96 h after transfected with miR-370-5p,the cell survival rates were respectively (0.395 ±0.040),(0.691±0.042),(0.874±0.045)and (0.437±0.044),(0.700±0.051),(0.875±0.052),indicating that cell prolif-eration ability decreased obviously when transfected with miR-370-5p (P <0.05),compared with dsControl group;meanwhile, when transfected with siP21 and miR-370-5p,the cell survival rates were respectively (0.675 ± 0.041 ),(1.072 ± 0.124), (1.323±0.136)and (0.633±0.106),(1.072 ±0.167),(1.337 ±0.102),indicating that cell proliferation ability was restored when co-transfected with siP21 and miR-370-5p (P <0.05),compared with only transfected with miR-370-5p group. Conclu-sions MiR-370-5p could up-regulate the expression of p21 by RNA activation pathway and inhibit the proliferation of prostate cancer cells.
    • 汪茜; 朱苹; 吴丽芳; 陈建武; 洪金省; 应学明; 赵建华
    • 摘要: 目的:构建腺病毒rAd-CMV-E1A,将其作用于人鼻咽癌CNE-1细胞,验证目的基因E1A是否具有放射增敏作用及其作用机制.方法:使用"两步转化法",完成质粒pAd-pShuttle-CMV-E1A的构建,将其包装成腺病毒rAd-CMV-E1A;以相同的方法构建腺病毒rAd-CMV.使用噬菌斑法测定滴度.将病毒作用于CNE-1细胞,使用RT-PCR、实时荧光定量PCR检测E1A、p53、p21基因表达情况;联合X射线照射细胞,采用MTT比色法、细胞克隆形成实验、Annexin V-FITC/PI双染检测目的基因功能.结果:成功构建腺病毒rAd-CMV-E1A及腺病毒rAd-CMV,测得病毒滴度分别为1×1010pfu/ml.被转染目的基因E1A的CNE-1细胞能稳定转录E1A基因,会使p53基因转录增加,抑制p21基因转录.在2 Gy、4 Gy、6 Gy、8 Gy剂量下细胞生长抑制率rAd-CMV-E1A组高于rAd-CMV组(P0.05).射线+rAd-CMV-E1A组凋亡率最高(P0.05).The apoptosis rate of ray+rAd-CMV-E1A group was the highest(P<0.05).The cell survival fraction of rAd-CMV-E1A group was lower than that of rAd-CMV group,PBS(buffer saline phosphate,phosphate buffer solution)group under the same radiation dose(P<0.05).Radiation enhancement ratio:rAd-CMV-E1A group was better than rAd-CMV group.Conclusion:The adenovirus rAd-CMV-E1A and rAd-CMV were constructed successfully.The target gene E1A could undergo stable transcription in CNE-1 cells and increase the sensitivity of the CNE-1 cells to the X-rays.This phenomenon can be induced by the activated transcription of p53 gene and the inhibition of the p21 gene expression.
    • 董雪; 曹阳; 李婷; 苗晨曦; 阎琪
    • 摘要: 目的 研究亚砷酸钠(NaAsO2)对小鼠乳腺上皮细胞(NMuMG)的影响,为砷致乳腺癌机制提供理论依据.方法 以小鼠乳腺上皮细胞为模型,研究亚砷酸钠对乳腺上皮细胞形态的影响;经流式细胞仪检测亚砷酸钠对小鼠乳腺上皮细胞凋亡的影响;实时定量RT-PCR检测细胞周期基因P21 mRNAs表达水平.结果 NaAsO2对NMuMG具有毒性效应,在一定浓度范围内,随NaAsO2浓度升高,细胞形态明显改变,凋亡明显增多,且呈剂量-效应关系;细胞增殖的抑制基因P21 mRNA水平增高了18.12倍.结论 亚砷酸钠可能通过上调P21基因的表达来抑制NMuMG增殖,可能是砷中毒引起乳腺癌的发生机制之一.%Objective To study the effect of sodium arsenite (NaAsO2) on mouse mammary epithelial cells (NMuMG), and to provide a theoretical basis for arsenic induced breast cancer mechanism. Methods The effect of sodium arsenite on the morphology of mammary epithelial cells was studied by using mouse mammary epithelial cells as models. The effect of sodium arsenite on the apoptosis of mouse mammary epithelial cells was detected by flow cytometry. Cell cycle gene P21 mRNAs expression level was detected by real-time quantitative RT-PCR. Results NaAsO2 has toxic effect on NMuMG. In a certain range of concentration, with the increase of NaAsO2 concentration, the cell morphology changes obviously, and the apoptosis increases obviously, and dose-response relationship exists. The level of P21 mRNA, an inhibitor of cell proliferation, was increased by 18.12 times. Conclusion Sodium arsenite may inhibit the proliferation of NMuMG by up-regulating the expression of P21 gene, which may be one of the mechanisms of arsenic poisoning caused by breast cancer.
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