目的探讨食管鳞癌组织中microRNA let-7a-3甲基化状态与血浆中类胰岛素样生长因子2(Insulin like growth factor 2,IGF-Ⅱ)表达的相关性。方法采用甲基化特异性PCR法(Methylation specific PCR,qMSP)检测83例食管癌及相对应的癌旁正常...目的探讨食管鳞癌组织中microRNA let-7a-3甲基化状态与血浆中类胰岛素样生长因子2(Insulin like growth factor 2,IGF-Ⅱ)表达的相关性。方法采用甲基化特异性PCR法(Methylation specific PCR,qMSP)检测83例食管癌及相对应的癌旁正常组织中let-7a-3甲基化状态,采用酶联免疫吸附试验(Enzyme linked immunosorbent assay,ELISA)检测血浆中IGF-Ⅱ的表达水平。结果83例食管鳞癌患者癌组织中的microRNA let-7a-3甲基化程度显著高于癌旁正常组织(P<0.001)。83例食管鳞癌患者血浆中IGF-Ⅱ的表达水平与let-7a-3基因的甲基化程度总体上呈正相关,具有统计学意义(r=0.600,P<0.001)。结论microRNA let-7a-3可能通过对下游分子的甲基化调控参与食管鳞癌的发生发展,这对了解食管鳞癌形成的机制具有重要意义,可为食管鳞癌的诊断和预后提供依据。展开更多
[目的]研究微小RNA let-7a(microRNA let-7a,miR-let-7a)对脂磷壁酸(Lipoteichoic acid,LTA)诱导的炎性奶牛乳腺上皮细胞(MAC-T)的增殖和凋亡作用。[方法]通过实时荧光定量PCR(Quantitative real time polymerase chain reaction,qRT-P...[目的]研究微小RNA let-7a(microRNA let-7a,miR-let-7a)对脂磷壁酸(Lipoteichoic acid,LTA)诱导的炎性奶牛乳腺上皮细胞(MAC-T)的增殖和凋亡作用。[方法]通过实时荧光定量PCR(Quantitative real time polymerase chain reaction,qRT-PCR)、实时细胞分析仪和流式细胞术检测过表达和抑制表达miR-let-7a在炎性MAC-T中的影响。[结果]qRT-PCR检测结果显示,转染miR-let-7a模拟物会使炎性MAC-T细胞中miR-let-7a的表达量极显著上调(P<0.001),转染miR-let-7a抑制剂会使细胞中miR-let-7a的表达量极显著下降(P<0.001);RTCA结果显示,转染miR-let-7a模拟物能明显促进MAC-T细胞增殖,转染miR-let-7a抑制物会使MAC-T细胞的增殖受到抑制;流式细胞术结果显示,转染miR-let-7a模拟物的MAC-T细胞的凋亡率显著降低(P<0.01);而转染miR-let-7a抑制剂则与之相反,MAC-T细胞的凋亡率显著升高(P<0.01)。即过表达miR-let-7a可以促进MAC-T细胞增殖,并降低细胞的凋亡率。而抑制表达miR-let-7a的作用与之相反,抑制表达miR-let-7a使MAC-T细胞的增殖下降,细胞的凋亡率增大。[结论]miR-let-7a是一种抑制炎症调节因子,其过表达可以缓解奶牛乳腺炎,为阐明奶牛乳腺炎的分子调控机制奠定基础。展开更多
Scarlet fever(SF)is a common infectious disease caused by group A streptococcus(GAS)[1].During the 18th and 19th centuries,SF was a significant cause of mortality in children aged 5-15 years worldwide[2].The incidence...Scarlet fever(SF)is a common infectious disease caused by group A streptococcus(GAS)[1].During the 18th and 19th centuries,SF was a significant cause of mortality in children aged 5-15 years worldwide[2].The incidence and fatality rates of SF have decreased remarkably due to the widespread use of effective antibiotics and improvements in diet and sanitation[3].However,the recent resurgence of SF has sparked significant interest in infectious diseases[1,3].Given the insufficient understanding of the triggers that cause SF outbreaks and the absence of available vaccines to prevent GAS infection to date[1],effective prevention and control programs are needed to manage the ongoing spread of SF.展开更多
文摘[目的]研究微小RNA let-7a(microRNA let-7a,miR-let-7a)对脂磷壁酸(Lipoteichoic acid,LTA)诱导的炎性奶牛乳腺上皮细胞(MAC-T)的增殖和凋亡作用。[方法]通过实时荧光定量PCR(Quantitative real time polymerase chain reaction,qRT-PCR)、实时细胞分析仪和流式细胞术检测过表达和抑制表达miR-let-7a在炎性MAC-T中的影响。[结果]qRT-PCR检测结果显示,转染miR-let-7a模拟物会使炎性MAC-T细胞中miR-let-7a的表达量极显著上调(P<0.001),转染miR-let-7a抑制剂会使细胞中miR-let-7a的表达量极显著下降(P<0.001);RTCA结果显示,转染miR-let-7a模拟物能明显促进MAC-T细胞增殖,转染miR-let-7a抑制物会使MAC-T细胞的增殖受到抑制;流式细胞术结果显示,转染miR-let-7a模拟物的MAC-T细胞的凋亡率显著降低(P<0.01);而转染miR-let-7a抑制剂则与之相反,MAC-T细胞的凋亡率显著升高(P<0.01)。即过表达miR-let-7a可以促进MAC-T细胞增殖,并降低细胞的凋亡率。而抑制表达miR-let-7a的作用与之相反,抑制表达miR-let-7a使MAC-T细胞的增殖下降,细胞的凋亡率增大。[结论]miR-let-7a是一种抑制炎症调节因子,其过表达可以缓解奶牛乳腺炎,为阐明奶牛乳腺炎的分子调控机制奠定基础。
基金supported by the Key Scientific Research Project of Universities in Henan(21A330004)Supported by the Open Project Program of the First Hospital of Xinxiang Medical University(XZZX2022002).
文摘Scarlet fever(SF)is a common infectious disease caused by group A streptococcus(GAS)[1].During the 18th and 19th centuries,SF was a significant cause of mortality in children aged 5-15 years worldwide[2].The incidence and fatality rates of SF have decreased remarkably due to the widespread use of effective antibiotics and improvements in diet and sanitation[3].However,the recent resurgence of SF has sparked significant interest in infectious diseases[1,3].Given the insufficient understanding of the triggers that cause SF outbreaks and the absence of available vaccines to prevent GAS infection to date[1],effective prevention and control programs are needed to manage the ongoing spread of SF.
