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胚胎成纤维细胞

胚胎成纤维细胞的相关文献在1982年到2022年内共计116篇,主要集中在基础医学、畜牧、动物医学、狩猎、蚕、蜂、生物工程学(生物技术) 等领域,其中期刊论文86篇、会议论文18篇、专利文献331811篇;相关期刊64种,包括中国实验动物学报、中国学术期刊文摘、吉林大学学报(医学版)等; 相关会议15种,包括第十三届全国劳动卫生与职业病学术会议、第十三届中南地区实验动物科技交流会、第四届中国衰老与抗衰老学术大会等;胚胎成纤维细胞的相关文献由476位作者贡献,包括顾为望、岳敏、赖良学等。

胚胎成纤维细胞—发文量

期刊论文>

论文:86 占比:0.03%

会议论文>

论文:18 占比:0.01%

专利文献>

论文:331811 占比:99.97%

总计:331915篇

胚胎成纤维细胞—发文趋势图

胚胎成纤维细胞

-研究学者

  • 顾为望
  • 岳敏
  • 赖良学
  • 那顺巴雅尔
  • 刘薇
  • YUE Min
  • 唐华
  • 肖东
  • 袁进
  • 黄黎珍
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 陈世钰; 苏欣; 刘俊平; 石宇彤; 吴敏敏; 徐梦歧; 张凤梅; 唐敏
    • 摘要: 目的 探究肾母细胞瘤过表达因子(NOV/CCN3)对间充质干细胞增殖的影响及调控机制,为CCN3能否作为促增殖因子在骨组织工程的应用提供理论依据.方法 以小鼠成纤维细胞(MEFs)为间充质干细胞模型,利用重组腺病毒Ad-CCN3和Ad-siCCN3分别上调、下调MEFs中CCN3表达;流式细胞术检测不同处理组细胞周期、凋亡变化情况;Westernblot检测增殖指标PCNA、周期蛋白cyclin E、cyclin B1以及凋亡指标Bax、Bc1-2蛋白表达量,明确CCN3对MEFs增殖和凋亡的影响;ELISA检测CCN3蛋白分泌水平;RT-qPCR和Western blot检测Notch信号通路经典受体Notch1、配体DLL1、下游关键蛋白和/基因Hey1、p300、H3K9,以及MAPK通路相关蛋白ERK1+2和p-ERK1+2表达变化情况.结果 流式细胞术结果显示:与对照组相比,Ad-CCN3组细胞增殖指数增加(P<0.01),细胞凋亡百分比减少(P<0.05);且相关增殖凋亡指标PCNA、cyclinE、Bcl-2蛋白表达增加(P<0.05);RT-qPCR和Western blot结果显示过表达CCN3明显促进Notch信号通路中Notch1表达(P<0.01),但抑制DLL1和Hey1、p300、H3K9等表达(P<0.05);而MAPK通路中ERK1+2和p-ERK1+2蛋白表达增加(P<0.01).结论 CCN3可能通过与Notch1结合,抑制经典Notch信号通路,激活MAPK通路,促进MEFs增殖、抑制细胞凋亡,从而增加MEFs细胞数量,提示CCN3具有作为间充质干细胞的促增殖因子在骨组织工程发挥作用的潜在价值.
    • 裴阳晴; 丁明翠; 王迪; 郝长付; 姚武
    • 摘要: 目的:探讨miR-107在特发性纤维化(IPF)中对成纤维细胞(NIH-3T3)转分化的作用.方法:培养NIH-3T3细胞,2μg/L的TGF-β诱导NIH-3T3细胞转分化.收集培养48 h的细胞,Western blot法检测对照组和TGF-β组NIH-3T3细胞转分化标志α-SMA、CollagenⅠ、Fibronectin蛋白水平.将miR-107模拟物(mimic)及抑制剂(inhib-itor)分别转染NIH-3T3细胞,分为对照组、TGF-β组、TGF-β+NC组、TGF-β+inhibitor组、TGF-β+mimic组.West-ern blot检测NIH-3T3细胞 α-SMA、CollagenⅠ、Fibronectin蛋白水平的表达.结果:与对照组相比,TGF-β 组 α-SMA、CollagenⅠ、Fibronectin蛋白表达水平升高,miR-107的相对表达水平升高(P<0.05).转染miR-107 inhibitor后,与TGF-β+NC组相比,miR-107 inhibitor组细胞中miR-107表达水平降低(P<0.05);与TGF-β+NC组相比,TGF-β+inhibitor组的α-SMA、CollagenⅠ、Fibronectin蛋白水平均降低(P<0.05).转染miR-107 mimic后,与TGF-β+NC组相比,miR-107 mimic组细胞中miR-107表达水平升高(P<0.05);TGF-β+mimic组的α-SMA、CollagenⅠ、Fibronectin蛋白水平均升高,差异有统计学意义(P<0.05).结论:抑制miR-107的表达可以抑制TGF-β诱导的NIH-3T3细胞转分化.
    • 张鹏飞; 张硌; 陆琤; 周晨辰
    • 摘要: Objective:To establish an immortalized mouse embryonic fibroblast (MEF) cell line of PLEKHQ1 gene knockout mice in order to comprehensively research function of PLEKHQ1 gene and provide cell experiment materials.Methods: The method of slow virus infection was adopted to transfect gene of simian virus 40(SV40)large T antigen into MEF cell which have been identified genotype to establish an immortalized cell lines. Polymerase chain reaction(PCR)was used to detect the integration of the genome of SV40 large T antigen in the mice embryonic fibroblast cell. Expression of SV40 large T antigen gene in MEF cell was identified by reverse transcription PCR and gel imaging.Results: The mRNA of SV40 T antigen gene has been integrated in cells of the immortalized cell line, and through observation, stable growth and serial propagation of the immortalized MEF cell have achieved for half the year.Conclusion: Successful establishment of the PLEKHQ1 knockout immortalized MEF cell line can provide cell experimental material for further study of PLEKHQ1 function.%目的:建立PLEKHQ1基因敲除小鼠胚胎成纤维细胞(MEF)永生化细胞系,为全面研究PLEKHQ1基因功能提供细胞实验材料.方法:采用慢病毒感染的方法将猿猴病毒40(SV40)大T抗原基因导入已鉴定出基因型的MEF中,建立永生化细胞系;利用聚合酶链反应(PCR)检测SV40大T抗原基因在MEF中的整合情况,利用反转录PCR及凝胶成像的方法观察SV40大T抗原基因在MEF中的表达.结果:SV40大T抗原基因已整合至MEF中,且此类MEF已扩大培养及稳定传代半年之久.结论:成功建立的PLEKHQ1基因敲除MEF永生化细胞系,可为进一步研究PLEKHQ1基因功能提供细胞实验材料.
    • 王娟; 陈小欢; 李磊; 卢夏英; 姜勇
    • 摘要: Objective To explore the role of p38 MAPK on the apoptosis of mouse embryo fibroblasts induced by myeloid-related protein 8 (MRP8)/myeloid-related protein 14 (MRP14).Methods MTT assay was performed to detect the cell viability of p38+/+ and p38-/-cells in the control group and groups in which cells were treated with 50 μg/mL MRP8, MRP14, and MRP8/14 for 24 h and 48 h;flow cytometry was applied to detect the apoptosis rate of p38+/+ and p38-/-cells in the control group and groups in which cells were treated with 50 μg/mL MRP8/14 for 24 h and 48 h;MTT assay was performed to detect the cell viability of p38+/+ cells in the control group, MRP8/14 group, MRP8/14+TAK242(TLR4 inhibitor) group and MRP8/14+RAGE neutralized antibody group for 24 h;MTT and flow cytometry were used to analyze the cell viability and the apoptosis rate of p38+/+ cells in the control group, MRP8/14 group, MRP8/14+SB203580 (p38 MAPK inhibitor) group for 24 h;Western blotting was used to detect the phosphorylation changes of p38 MAPK in p38+/+ cells treated with MRP8/14 for 0, 1, 2, 4, 6, and 8 h, respectively.Results The cell viability of p38+/+ and p38-/-cells in the groups treated with MRP8, MRP14, and MRP8/14 for 24 h and 48 h was lower than that of the control group (P0.05).MRP8/14组、MRP8/14+RAGE组干预24 h p38+/+细胞活力低于空白对照组、MRP8/14+TAK242组干预24 h(P均<0.05).MRP8/14+SB203580组干预24 h p38+/+细胞活力较MRP8/14组干预24 h明显升高,细胞凋亡率较MRP8/14组干预24 h明显降低(P均<0.05).MRP8/14干预2、4、6 h p38+/+细胞p38 MAPK磷酸化水平明显高于干预0、1、8 h(P均<0.05).结论 p38 MAPK能促进MRP8/14诱导的小鼠成纤维细胞凋亡,其机制可能与TLR4-p38 MAPK信号通路激活有关.
    • 陈学正1; 王清华1; 杨东奇1; 马润林1; 石小倩2
    • 摘要: 小鼠Reticulocalbin(RCN3)蛋白是一种定位于哺乳动物内质网分泌途径,含有6个EF-Hand结构域的内质网钙离子结合蛋白。为了研究Rcn3与内质网应激机制的相关性,我们利用前期获得的Rcn3基因敲除小鼠胚胎成纤维细胞作为实验材料。将细胞分别用毒胡萝卜素(TG)和衣霉素(TM)处理,并通过QPCR和Western Blot技术测得在内质网应激情况下Rcn3基因和RCN3蛋白的表达量。
    • 陈凤超; 陈民才; 颜彤彤; 曾燕; 杨俊革
    • 摘要: 目的 观察鼠胚胎成纤维细胞三维培养修复大鼠全层皮肤缺损的效果,并对其机制进行分析.方法 采用组织块法培养鼠胚胎成纤维细胞,将鼠尾胶原溶液和以血清重悬的鼠胚胎成纤维细胞溶液混合后形成凝胶构建组织工程皮肤,移植于大鼠背部全层皮肤缺损创面.实验组30只全层皮肤缺损大鼠采用组织工程皮肤进行修复.对照组30只全层皮肤缺损大鼠不做任何处理.两组创面分别进行HE染色和免疫组织化学染色,计算微血管密度,观察其愈合过程.结果 术后20 d实验组用组织工程皮肤覆盖的大鼠背部创面已完全愈合,新生上皮外观与结构和正常皮肤相似;对照组创面仍有痂皮覆盖,去除痂皮可见肉芽组织红润致密,创面周围新生上皮呈粉红色,边缘锐利皱缩.实验组创面组织中CD31表达及微血管密度均明显高于对照组,差异有统计学意义(P<0.05).结论 鼠胚胎成纤维细胞三维培养对动物皮肤全层缺损的修复有很好的效果,在修复皮肤损伤方面具有良好的临床应用前景.
    • 岳敏; 田雨光; 万斌; 庞炜; 吴清洪; 王玉珏
    • 摘要: 本研究旨在探索西藏藏猪生长迟缓成因和分子机理.采用逆转录聚合酶链反应(RT-PCR)技术对西藏藏猪生长激素受体(GHR)基因克隆,采用生物信息学方法分析西藏藏猪生长激素受体基因与其他常见品种猪基因与蛋白序列差异,并构建GHR基因的真核过表达质粒,转染到西藏藏猪胚胎成纤维细胞(PEFs)上进行瞬时表达,通过MTT检测细胞增殖活性,利用实时荧光定量PCR技术检测细胞的胰岛素样生长因子-1(IGF-1)表达的情况.西藏藏猪GHR基因编码区1 716 bp,编码572个氨基酸;与普通猪GHR基因序列进行比对分析表明,在西藏藏猪GHR基因编码区1 225 bp处发生T→G突变,导致丝氨酸突变为丙氨酸;GHR基因真核过表达质粒成功转染PEFs后,PEFs生长活性显著提高;qPCR 检测表明,细胞株中IGF-1表达显著上调.综上表明,GHR基因的表达可以提高PEFs细胞的增殖活性,诱导IGF-1基因的表达,GHR基因在1 225 bp处的点突变可能影响西藏藏猪的生长迟缓.
    • 王庆华; 王生存; 李斌; 刘春; 吴刘成; 王旭; 彭晓清; 邵义祥
    • 摘要: To investigate the effects of catalytic subunit βof protein phosphatase 2A (PP2A)on cell cycle and cell apoptosis in mouse embryo fibroblasts (MEFs),the mouse embryos at E12.5 by mating the heter-ozygotes of Cβ subunit conventional knockout male and female mice at the ratio of 1 ∶ 2 were obtained. MEFs were prepared by trypsin digestion and genotyped by PCR,RT-PCR and Western blot to identify the genetic basis of each embryo.FACs was carried out to determine the cell apoptosis and cell cycle, meanwhile,the anti-apoptosis protein Bcl-2 was checked by Western blot.Genotyping by PCR,RT-PCR and Western blot showed that both knockout and wildtype MEFs were isolated by trypsin digestion at the ratio of 3∶3.The MEFs at M1 stage was 46.94%±4.17 and 53.95%±2.81,respectively and M2 stage was 29.83%±3.25 and 21.14%±2.53.There is no significant difference in cell apoptosis between wildtype and Cβknockout MEFs and slight significant difference between wildtype and knockout MEFs in cell cycle.%为探究蛋白磷酸酶2A 的 Cβ亚基在胚胎成纤维细胞(MEFs)凋亡过程中的作用,用 Cβ+/-的杂合子雄鼠与雌鼠1∶2配对,取胚胎期12.5 d(E12.5)的胚胎制备 MEFs,用 PCR、RT-PCR 和 Western blot方法进行基因型鉴定。同时对 P3代 MEFs 利用流式分选技术检测其细胞凋亡和细胞周期的变化,并采用Western blot 检测抗凋亡蛋白 Bcl-2的表达。结果采用胰酶消化方法成功获得了 MEFs,DNA、RNA 和蛋白水平鉴定显示获得了3对3的野生型和 Cβ基因敲除 MEFs。流式分选发现 Cβ基因敲除 MEFs 和野生型之间细胞分裂期前期(M1期)细胞分别为53.95%±2.81和46.94%±4.17,细胞分裂期后期(M2期)细胞分别为21.14%±2.53和29.83%±3.25。但 Bcl-2的蛋白表达量和 mRNA 表达量没有显著差异。结果表明,虽然蛋白磷酸酶2A 的 Cβ亚基的缺失并不会导致小鼠胚胎死亡,但 Cβ亚基的缺失会轻微影响胚胎成纤维细胞(MEFs)的细胞周期。
    • 沈丹; 崔恒宓; 宋成义; 谢雨琇; 李庆平; 薛松磊; 史云强; 王赛赛; 陈才; 钱跃; 高波
    • 摘要: [Objective] Transposons are the basic unit of chromosomes which can autonomously replicate and shift within the whole genome. Sleeping beauty(SB), piggyBac(PB) and Tol2, found from salmonid, cabbage looper mothTrichoplusia ni and Oryzias latipes, respectively, are most active transposons in the vertebrates today. This paper compares the transfection, insertion and cutting efficiencies of the 3 different transposons in 3T3 cells, then obtained the best transposon system at the cellular level.[Method] The 3′ and 5′ terminal transposable elements were cloned from SB, PB and Tol2 transposon vectors using the high-fidelity PCR in this experiment, ensured the accuracy through sequencing, then the transposable elements were subcloned one-by-one into the pT2-HB carrier frame, thus constructed the multi-transposon vectors, pT3-PST, which included all 3 transposons. Green fluorescent protein expression cassette (pCAG-GFP) and neomycin expression cassette (NEO) genes were cloned into pT3-PST carrier, resulting in two expression vectors, pT3-PST-CAG-GFP and pT3-PGK-NEO. These two expression vectors, with the transposase expression plasmid pCMV-SB100X,were mixed with pCMV-HAhyPBase and pCMV-Tol2 at a mass ratio of 1:1, respectively. They were then wrapped by polycation PEI, and co-transfected into the mouse embrynic fibrilasts (3T3). At the same time, a negative control group was set up using the inactive transposase vector SB△DD. After 36 h post-transfection ofGFP, detection ofGFP expression was done by fluorescence microscopy, and real-time fluorescent quantitative PCR, after cell genome extraction and usingAmp as an internal reference. Primers were designed according to the upstream and downstream sequences, then the cutting efficiency of the 3 transposons was determined by real-time fluorescent quantitative PCR. After 48 h post-transfection of NEO, cells were filtered by using 500 µg·mL-1 G418 resistance screening until the normal cells were almost dead (10 d). The cells were stained with Giemsa stain, and the number of drug-resistant cells was counted, and finally different transposon activities of different groups were compared.[Result]Multi-transposon vectors, PT3-PST, pT3-PST-CAG-GFP,and pT3-PGK-NEO were successfully constructed. The transfection efficiency of cells in the experimental groups was more than 50%, and the difference was not significant (P>0.05). TheGFP relative copy number of SB group was higher than Tol2 and PB groups, but the difference was not significant (P>0.05), though it was significantly higher than the control group (P0.05). pT3-PGK-NEO and transposase co-transfected 3T3 cells, and the results of G418 selection showed that the number of drug-resistant cells of SB group was significantly higher than PB and Tol2 groups (P0.05). However, all the three experiment groups were significantly higher than that of the control group (P<0.01).[Conclusion]The SB transposon system efficiency, at the cellular level, was better than PB and Tol2, which could provide an effective tool for cellular transgenetic research.%【目的】转座子(transposon, Tn)是染色体上可自主复制和移位的基本单位,普遍存在生物体基因组内,Sleeping beauty(SB)、piggyBac(PB)和Tol2分别来源于鲑鱼、甘蓝尺蠖蛾和青鳉鱼,是目前脊椎动物中活性较高的转座子。比较了这3种转座子在哺乳动物细胞的转染、插入和剪切效率,从而获得细胞水平上的高活性转座子系统。【方法】通过高保真PCR法分别从SB、PB和Tol23种转座子载体克隆3种转座子3′和5′端的转座元件,测序正确后,将各转座元件依次亚克隆至 pT2-HB 载体框架,构建成包含这3种转座子的多转座子载体pT3-PST。将绿色荧光蛋白表达框CAG-GFP和新霉素表达框PGK-NEO分别克隆至pT3-PST载体,获得两个表达载体pT3-PST-CAG-GFP和pT3-PGK-NEO。将这两个表达载体分别和转座酶表达质粒pCMV-SB100X、 pCMV-HAhyPBase、pCMV-Tol2以1﹕1质量比混合,经多聚阳离子PEI包裹,共转染小鼠胚胎成纤维细胞(3T3),同时以突变失活的转座酶质粒SB△DD与转座子载体共转染作为阴性对照组。转染GFP 36 h后,用荧光显微镜进行检测GFP表达率,提取细胞基因组,以Amp基因作为内参,进行实时荧光定量PCR,检测GFP插入拷贝数;根据被剪切位置上下游序列设计引物,进行实时荧光定量PCR,检测3种转座子的剪切效率。细胞转染NEO 48 h后,用浓度为500µg·mL-1的G418进行耐药性筛选,至正常细胞基本全部死亡(10 d),将细胞进行吉姆萨染液染色,统计耐药细胞数,从而比较各组转座活性。【结果】成功构建了多转座子载体 PT3-PST、pT3-PST-CAG-GFP和pT3-PGK-NEO。实验组转染细胞效率均大于50%,且差异不显著(P>0.05)。SB组GFP相对拷贝数高于Tol2和PB组,但差异不显著(P>0.05),均显著高于对照组(P<0.05)。SB和PB组剪切效率显著高于Tol2组(P<0.05),但SB和PB组之间差异不显著(P>0.05)。pT3-PGK-NEO与转座酶共转染3T3细胞,G418抗性筛选结果表明,SB组耐药细胞数显著高于PB和Tol2组(P<0.05),但PB和Tol2两组差异不显著(P>0.05),此3组均极显著高于阴性对照组(P<0.01)。【结论】SB转座子系统在细胞水平的转座效率优于PB和Tol2,为细胞水平的转基因研究提供有效基因转移工具。
    • 苏晓琳; 邢秀梅; 赖关朝; 孙易; 赵志强; 陈静莉; 申碧羚; 刘新霞; 何云
    • 摘要: Objective To investigate the effect of CCM3 gene defection on lead induced cell genotoxicity in mouse embryonic fibroblasts.Methods C57 female mice were mated with CCM3 gene heterozygous male mice.E13.5 embryos were taken to isolate primary mouse embryonic fibroblasts.After genotyping,wild type and heterozygous cells were treated with different doses of lead acetate.Cell viability,genotoxicity and protein expression were detected by MTS assay,CB micronucleus method and Western blot,respectively.Results Mouse embryonic fibroblasts with lead acetate treatment for 24 h,wild-type cells 100.00 μmol/L lead acetate-treated group (69.16 ± 1.36) and the control group (100.00 ± 2.33) compared to cells decreased by 30%,CCM3 heterozygous type cell 100.00 μmol/L lead acetate-treated group (87.16±5.50) and the control group (100.00 ± 2.06) compared to cells decreased by 13%,the difference was statistically significant (F values were 98.59,82.63,P < 0.001).Lead acetate treatment after 48 h,wild-type cells 100.00 μmol/L lead acetate-treated group (51.99 ±5.62) and the control group (100.00 ± 3.11) compared to cells decreased by 50%,heterozygous type cells 100.00 μmol/L lead acetate treatment group (66.33 ± 4.06) and the control group (100.00 ± 5.72) compared to cells decreased by 35%,the differences were statistically significant (F values were 82.63,36.86,P <0.001).The results of CBMN test showed that with increased dose,micronucleus cell rate of two genotypes showed an increasing trend,in the wild-type cells,the micronucleus cell rate (/1 000) for the control group,29.6 ± 2.2,6.25 μmol/L dose group 47.3 ± 6.6,25 μmol/L dose group 55.5 ± 9.1,100.00 μ mol/L dose group 66.8 ±3.5;heterozygous cells micronucleus cell rate (/1 000) for the control group,35.3 ± 5.6,6.25 μmol/L dose of 50.0 ± 8.3,25.00 μ mol/L dose group 57.0 ± 8.5,100.00 μmol/L dose group 58.8 ±2.1.Micronucleus cell rates(/1 000) were significant differences,in 100.00 μmol/L dose groups of two genotypes.Western blot results showed that wild-type cells CCM3 expression 100.00 μmol/L lead acetate-treated group (0.70 ± 0.03) was 1.32 times higher than the control group (0.53 ± 0.07),heterozygous cells CCM3 expression 100.00 μmol/L lead acetate-treated group (0.48 ± 0.02) was 1.77 times higher than control group that of 0.27 ± 0.04,there was statistically significant difference (F values were 14.77,25.74,P < 0.001);wild-type cells γ-H2AX expression 100.00 μmol/L lead acetate-treated group (0.69 ± 0.03) was 1.06 times higher than the control group (0.65 ± 0.07),heterozygous cells γ-H2AX expression 100.00 μmol/L lead acetate-treated group (0.99 ±0.04) was 1.55 times higher than the control group CCM3 expression levels (0.64 ± 0.06),there was statistically significant difference (wild-type cells:F =7.08,P =0.012,heterozygous type cell:F =13.49,P =0.002).Conclusion CCM3 gene may play a role in lead-induced genetic toxicity of mouse embryonic fibroblasts,CCM3 gene-lead interactions effects on mouse embryonic fibroblasts cell toxicity.%目的 探讨CCM3基因缺陷对醋酸铅所致小鼠胚胎成纤维细胞遗传毒性的影响.方法 将C57雌鼠与CCM3基因敲除小鼠杂合雄鼠合笼后,取孕13.5 d的胎鼠,原代分离培养胚胎成纤维细胞.基因分型后,野生型和CCM3基因缺陷型细胞分别给予6.25、12.50、25.00、50.00、100.00、200.00 μmol/L醋酸铅处理,用MTS法检测细胞活性,并根据实验结果,选择6.25、25.00、100.00 μmol/L醋酸铅染毒,用双核阻滞法检测遗传毒性,用Western blot法检测相关基因的蛋白表达情况.结果 小鼠胚胎成纤维细胞经醋酸铅处理24 h后,野生型细胞100.00 μmol/L醋酸铅处理组(69.16±1.36)与对照组(100.00±2.33)相比,细胞活性下降了30%,杂合型细胞100.00 μmol/L醋酸铅处理组(87.16±5.50)与对照组(100±2.06)相比,细胞活性下降了13%,差异有统计学意义(F野生型=98.59,F杂合型=82.63,P值均<0.001).经醋酸铅处理48 h后,野生型细胞100.00 μmol/L醋酸铅处理组(51.99±5.62)与对照组(100.00±3.11)相比,细胞活性下降了50%,杂合型细胞100.00 μmol/L醋酸铅处理组(66.33±4.06)与对照组(100.00±5.72)相比,细胞活性下降了35%,差异均有统计学意义(F野生型=82.63,F杂合型=36.86,P值均<0.001).双核微核实验结果显示,随着染毒剂量增加,两种基因型细胞的核分裂指数逐渐下降,双核细胞微核率呈逐渐升高趋势,野生型细胞对照组、6.25、25.00、100.00 μmol/L剂量组的双核微核细胞率分别为29.6 ±2.2、47.3±6.6、55.5±9.1、66.8±3.5(/1 000);杂合型细胞的双核微核细胞率则分别为35.3 ±5.6、50.0±8.3、57.0±8.5、58.8±2.1(/1000).Western blot结果显示,野生型细胞100.00 μmol/L醋酸铅处理组(0.70±0.03)的CCM3表达量是对照组(0.53±0.07)的1.32倍,杂合型细胞100.00 μmol/L醋酸铅处理组(0.48±0.02)的CCM3表达量是对照组(0.27±0.04)的1.77倍,缺陷型细胞升高较多,差异有统计学意义(F野生型=14.77,F杂合型=25.74,P值均<0.001);野生型细胞100.00 μmol/L醋酸铅处理组(0.69±0.03)的γ-H2AX表达量是对照组(0.65±0.07)的1.06倍,杂合型细胞100.00 μmol/L醋酸铅处理组(0.99±0.04)的CCM3表达量是对照组(0.64±0.06)的1.55倍,差异有统计学意义(F野生型=7.08,P=0.012;F杂台型=13.49,P=0.002).结论 CCM3基因可能在铅所致小胚胎成纤维细胞的遗传毒性中发挥作用,在小鼠胚胎成纤维细胞毒性方面,铅暴露与CCM3基因存在交互作用.
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