目的:探讨口腔癌细胞来源外泌体miR-582-3p对口腔癌细胞的恶性表型的影响及作用机制。方法:收集口腔患者血清和细胞上清外泌体,透射电镜和纳米颗粒示踪分析观察和鉴定外泌体。RT-qPCR检测microRNA-582-3p(miR-582-3p)及分泌卷曲相关蛋白...目的:探讨口腔癌细胞来源外泌体miR-582-3p对口腔癌细胞的恶性表型的影响及作用机制。方法:收集口腔患者血清和细胞上清外泌体,透射电镜和纳米颗粒示踪分析观察和鉴定外泌体。RT-qPCR检测microRNA-582-3p(miR-582-3p)及分泌卷曲相关蛋白1(secreted frizzled-related protein 1,SFRP1)的mRNA的表达。CCK-8、EdU实验、克隆形成实验、划痕实验和Transwell实验分别检测细胞活性、增殖、迁移和侵袭情况。双荧光素酶报告基因系统用于检测miR-582-3p与SFRP1的相关性。Western blot检测外泌体相关标志物(HSP70、CD81、CD9、CD63、TSG101和Alix)及SFRP1蛋白表达。异种移植瘤实验验证口腔癌细胞来源外泌体miR-582-3p在口腔癌中的促进作用。结果:口腔癌患者组织、血清及血清和细胞外泌体中miR-193b-3p表达明显升高。口腔癌细胞外泌体miR-582-3p促进口腔癌细胞增殖、迁移和侵袭。miR-582-3p可直接靶向SFRP1。过表达SFRP1减弱miR-582-3p对口腔癌细胞恶性表型的促进作用。体内实验证实外泌体miR-582-3p促进口腔癌肿瘤的生长。结论:口腔癌细胞来源外泌体miR-582-3p通过靶向SFRP1驱动口腔癌细胞的恶性表型。展开更多
目的探讨高糖培养肾小管上皮细胞中miR-27 a调控分泌型卷曲相关蛋白1(Sfrp1)对细胞向间质细胞转分化(EMT)的影响。方法将NRK-52E细胞分为正常糖(NG组)和高糖(HG组)两组,利用RT-qPCR检测NRK-52E细胞中miR-27 a、Sfrp 1的表达情况,Western...目的探讨高糖培养肾小管上皮细胞中miR-27 a调控分泌型卷曲相关蛋白1(Sfrp1)对细胞向间质细胞转分化(EMT)的影响。方法将NRK-52E细胞分为正常糖(NG组)和高糖(HG组)两组,利用RT-qPCR检测NRK-52E细胞中miR-27 a、Sfrp 1的表达情况,Western blot检测NRK-52E细胞中Sfrp1、E-钙粘蛋白(E-cadherin)、α平滑肌肌动蛋白(α-SMA)、Ⅳ型胶原(col-Ⅳ)的蛋白表达;将NRK-52E细胞分为野生型Sfrp 1-3′UTR+miR-27 a mimics阴性对照组(wt Sfrp 1-3′UTR+miR-27 a mnc组)、野生型Sfrp 1-3′UTR+miR-27 a mimics组(wt Sfrp 1-3′UTR+miR-27 a m组)、突变型Sfrp 1-3′UTR+miR-27 a mimics阴性对照组(mt Sfrp 1-3′UTR+miR-27 a mnc组)以及突变型Sfrp 1-3′UTR+miR-27 a mimics组(mt Sfrp 1-3′UTR+miR-27 a m),通过双荧光素酶报告基因检测系统检测萤火虫荧光值与海肾荧光值的比值,验证miR-27 a对Sfrp1表达的影响;在高糖诱导下,利用细胞转染实验将NRK-52E细胞设miR-27 a mimics阴性对照组(miR-27 a mnc组)、miR-27 a mimics组(miR-27 a m组)、miR-27 a inhibitor阴性对照组(miR-27 a inc组)以及miR-27 a inhibitor组(miR-27 a i组),通过RT-qPCR检测各组细胞中miR-27 a、Sfrp 1 mRNA的表达,Western blot检测各组细胞中Sfrp1、E-cadherin、α-SMA、col-Ⅳ蛋白的表达水平。结果RT-qPCR结果显示,与NG组比较,HG组miR-27 a表达水平增高(P<0.05),Sfrp 1 mRNA表达水平降低(P<0.05);Western blot结果显示,与NG组比较,HG组α-SMA、col-Ⅳ蛋白水平增高(P<0.05),Sfrp1、E-cadherin蛋白表达水平降低(P<0.05);荧光素酶报告基因显示,wt Sfrp 1-3′UTR+miR-27 a m组荧光素酶活性明显低于wt Sfrp 1-3′UTR+miR-27 a mnc组(P<0.05),而mt Sfrp 1-3′UTR+miR-27a mnc组与mt Sfrp 1-3′UTR+miR-27 a m组荧光素酶活性未见明显变化(P>0.05);细胞转染RT-qPCR结果显示,与miR-27 a mnc组比较,miR-27 a m组miR-27 a表达增加(P<0.05),而Sfrp 1 mRNA表达降低(P<0.05);与miR-27 a inc组比较,miR-27 a i组miR-27 a表达降低(P<0.05),而Sfrp 1 mRNA表达�展开更多
Objective：To investigate the feasibility of the combination of detecting hypermethylated secreted frizzled-related protein 1 （SFRP1） and secreted frizzled-related protein 2（SFRP2） in feces as a panel of biomarker...Objective：To investigate the feasibility of the combination of detecting hypermethylated secreted frizzled-related protein 1 （SFRP1） and secreted frizzled-related protein 2（SFRP2） in feces as a panel of biomarkers for colorectal cancer（CRC） screening. Methods： Methylation-specific PCR（MSP） was performed to analyze methylation status of SFRP1 and SFRP2 in a blinded fashion in tumor tissues and in matched stool samples from 39 patients with primary CRC, 34 patients with adenomas, 17 patients with hyperplastic polyps and 20 endoscopically normal subjects as normal controls. Simultaneously we analyzed the correlation of hypermethylated SFRP1 and SFRP2 with the clinicopathological features of CRC. Results：Hypermethylated SFRP1 was detected in 92.3%, 76.5%, 47.1% of tissue samples and in 89.7%, 64.7%, 35.3% of matched fecal samples from CRC, adenoma and hyperplastic polyp, respectively. Hypermethylated SFRP2 was detected in 87.2%, 67.6%, 35.3% of tissue samples and in 82.1%, 55.9%, 29.4% of matched fecal samples from CRC, adenoma and hyperplastic polyp, respectively. Of these two genes, at least one hypermethylated was 94.9%, 82.4%, 52.9% in tissue samples and 92.3%,73.5%, 47.1% in matched fecal samples from CRC, adenoma and hyperplastic polyp, respectively. In contrast, no hypermethylated SFRP1 and SFRP2 were detected in mucosa tissues of normal controls, only 2 cases of fecal samples was detected with hypermethylated SFRP1 and another 1 case was detected with hypermethylated SFRP2. Moreover, no significant associations were observed between hypermethylated SFRP1,SFRP2 and clinicopathological features of CRC. Conclusion： Hypermethylation of SFRP1 and SFRP2 in feces are novel epigenetic biomarkers of CRC and carded high potential for the remote detection of CRC as non-invasive screening method, and combined analysis of hypermethylated SFRP1 and SFRP2 in fecal could further increase the detection rate of CRC and premalignant lesions.展开更多
文摘目的:探讨口腔癌细胞来源外泌体miR-582-3p对口腔癌细胞的恶性表型的影响及作用机制。方法:收集口腔患者血清和细胞上清外泌体,透射电镜和纳米颗粒示踪分析观察和鉴定外泌体。RT-qPCR检测microRNA-582-3p(miR-582-3p)及分泌卷曲相关蛋白1(secreted frizzled-related protein 1,SFRP1)的mRNA的表达。CCK-8、EdU实验、克隆形成实验、划痕实验和Transwell实验分别检测细胞活性、增殖、迁移和侵袭情况。双荧光素酶报告基因系统用于检测miR-582-3p与SFRP1的相关性。Western blot检测外泌体相关标志物(HSP70、CD81、CD9、CD63、TSG101和Alix)及SFRP1蛋白表达。异种移植瘤实验验证口腔癌细胞来源外泌体miR-582-3p在口腔癌中的促进作用。结果:口腔癌患者组织、血清及血清和细胞外泌体中miR-193b-3p表达明显升高。口腔癌细胞外泌体miR-582-3p促进口腔癌细胞增殖、迁移和侵袭。miR-582-3p可直接靶向SFRP1。过表达SFRP1减弱miR-582-3p对口腔癌细胞恶性表型的促进作用。体内实验证实外泌体miR-582-3p促进口腔癌肿瘤的生长。结论:口腔癌细胞来源外泌体miR-582-3p通过靶向SFRP1驱动口腔癌细胞的恶性表型。
文摘目的探讨高糖培养肾小管上皮细胞中miR-27 a调控分泌型卷曲相关蛋白1(Sfrp1)对细胞向间质细胞转分化(EMT)的影响。方法将NRK-52E细胞分为正常糖(NG组)和高糖(HG组)两组,利用RT-qPCR检测NRK-52E细胞中miR-27 a、Sfrp 1的表达情况,Western blot检测NRK-52E细胞中Sfrp1、E-钙粘蛋白(E-cadherin)、α平滑肌肌动蛋白(α-SMA)、Ⅳ型胶原(col-Ⅳ)的蛋白表达;将NRK-52E细胞分为野生型Sfrp 1-3′UTR+miR-27 a mimics阴性对照组(wt Sfrp 1-3′UTR+miR-27 a mnc组)、野生型Sfrp 1-3′UTR+miR-27 a mimics组(wt Sfrp 1-3′UTR+miR-27 a m组)、突变型Sfrp 1-3′UTR+miR-27 a mimics阴性对照组(mt Sfrp 1-3′UTR+miR-27 a mnc组)以及突变型Sfrp 1-3′UTR+miR-27 a mimics组(mt Sfrp 1-3′UTR+miR-27 a m),通过双荧光素酶报告基因检测系统检测萤火虫荧光值与海肾荧光值的比值,验证miR-27 a对Sfrp1表达的影响;在高糖诱导下,利用细胞转染实验将NRK-52E细胞设miR-27 a mimics阴性对照组(miR-27 a mnc组)、miR-27 a mimics组(miR-27 a m组)、miR-27 a inhibitor阴性对照组(miR-27 a inc组)以及miR-27 a inhibitor组(miR-27 a i组),通过RT-qPCR检测各组细胞中miR-27 a、Sfrp 1 mRNA的表达,Western blot检测各组细胞中Sfrp1、E-cadherin、α-SMA、col-Ⅳ蛋白的表达水平。结果RT-qPCR结果显示,与NG组比较,HG组miR-27 a表达水平增高(P<0.05),Sfrp 1 mRNA表达水平降低(P<0.05);Western blot结果显示,与NG组比较,HG组α-SMA、col-Ⅳ蛋白水平增高(P<0.05),Sfrp1、E-cadherin蛋白表达水平降低(P<0.05);荧光素酶报告基因显示,wt Sfrp 1-3′UTR+miR-27 a m组荧光素酶活性明显低于wt Sfrp 1-3′UTR+miR-27 a mnc组(P<0.05),而mt Sfrp 1-3′UTR+miR-27a mnc组与mt Sfrp 1-3′UTR+miR-27 a m组荧光素酶活性未见明显变化(P>0.05);细胞转染RT-qPCR结果显示,与miR-27 a mnc组比较,miR-27 a m组miR-27 a表达增加(P<0.05),而Sfrp 1 mRNA表达降低(P<0.05);与miR-27 a inc组比较,miR-27 a i组miR-27 a表达降低(P<0.05),而Sfrp 1 mRNA表达�
基金supported by the grant from Programs of Science and Technology Commission Foundation of Jiangsu Province(NO.BS2005036)
文摘Objective：To investigate the feasibility of the combination of detecting hypermethylated secreted frizzled-related protein 1 （SFRP1） and secreted frizzled-related protein 2（SFRP2） in feces as a panel of biomarkers for colorectal cancer（CRC） screening. Methods： Methylation-specific PCR（MSP） was performed to analyze methylation status of SFRP1 and SFRP2 in a blinded fashion in tumor tissues and in matched stool samples from 39 patients with primary CRC, 34 patients with adenomas, 17 patients with hyperplastic polyps and 20 endoscopically normal subjects as normal controls. Simultaneously we analyzed the correlation of hypermethylated SFRP1 and SFRP2 with the clinicopathological features of CRC. Results：Hypermethylated SFRP1 was detected in 92.3%, 76.5%, 47.1% of tissue samples and in 89.7%, 64.7%, 35.3% of matched fecal samples from CRC, adenoma and hyperplastic polyp, respectively. Hypermethylated SFRP2 was detected in 87.2%, 67.6%, 35.3% of tissue samples and in 82.1%, 55.9%, 29.4% of matched fecal samples from CRC, adenoma and hyperplastic polyp, respectively. Of these two genes, at least one hypermethylated was 94.9%, 82.4%, 52.9% in tissue samples and 92.3%,73.5%, 47.1% in matched fecal samples from CRC, adenoma and hyperplastic polyp, respectively. In contrast, no hypermethylated SFRP1 and SFRP2 were detected in mucosa tissues of normal controls, only 2 cases of fecal samples was detected with hypermethylated SFRP1 and another 1 case was detected with hypermethylated SFRP2. Moreover, no significant associations were observed between hypermethylated SFRP1,SFRP2 and clinicopathological features of CRC. Conclusion： Hypermethylation of SFRP1 and SFRP2 in feces are novel epigenetic biomarkers of CRC and carded high potential for the remote detection of CRC as non-invasive screening method, and combined analysis of hypermethylated SFRP1 and SFRP2 in fecal could further increase the detection rate of CRC and premalignant lesions.
