目的:研究Ras蛋白激活物类似物-1基因(Ras protein activator like-1,RASAL1)在正常胃黏膜上皮细胞、胃癌细胞株中的表达情况及其生物学意义。方法:采用RT-PCR和Western blot分别检测高分化胃腺癌细胞株MKN-28、中分化胃腺癌细胞株SGC-7...目的:研究Ras蛋白激活物类似物-1基因(Ras protein activator like-1,RASAL1)在正常胃黏膜上皮细胞、胃癌细胞株中的表达情况及其生物学意义。方法:采用RT-PCR和Western blot分别检测高分化胃腺癌细胞株MKN-28、中分化胃腺癌细胞株SGC-7901、低分化胃腺癌细胞株BGC-823和正常胃黏膜上皮细胞株GES-1中RASAL1基因在mRNA水平和蛋白水平的表达,应用基因测序法检测上述3种胃癌细胞株中K-Ras基因第一外显子第12密码子点突变情况,并分析其意义。结果:RT-PCR和Westernblot检测结果显示,与正常胃黏膜上皮细胞相比,在3种不同分化胃腺癌细胞株中,RASAL1基因的表达在mRNA水平和蛋白水平均下调(P<0.05),分化程度越低表达下调越明显;测序结果表明3种胃腺癌细胞株中均未发现K-Ras基因第一外显子第12密码子点突变。结论:RASAL1基因在含野生型K-Ras的胃癌细胞中呈低表达状态,其表达水平与胃癌的恶性程度有一定的关系。展开更多
目的:观察+G z暴露对大鼠大脑皮层HSP70蛋白表达水平的影响,探讨+G z暴露致脑损伤的机理。方法:100只SD大鼠随机分为对照组,+2 G z暴露组,+6 G z暴露组,+10 G z暴露组,各组在G暴露后的6 h、1、2、4、6 d处死,免疫组织化学方法观察大鼠...目的:观察+G z暴露对大鼠大脑皮层HSP70蛋白表达水平的影响,探讨+G z暴露致脑损伤的机理。方法:100只SD大鼠随机分为对照组,+2 G z暴露组,+6 G z暴露组,+10 G z暴露组,各组在G暴露后的6 h、1、2、4、6 d处死,免疫组织化学方法观察大鼠脑皮层HSP70蛋白表达情况,并对结果进行统计分析。结果:3个+G z暴露组的HSP70蛋白表达水平均显著高于对照组;不同G值之间的比较表明,+6 G z组HSP70蛋白表达水平最高,+10 G z组最低。结论:+G z暴露对大鼠大脑皮层HSP70蛋白表达水平有显著影响。展开更多
The rusion or IL-2 to anti-id mAb MK2-23 which bears the internal image or human highmolecular weight melanoma-associated antigen (HMW-MAA) was used to immunize a group ofBALB/c mice. The results demonstrate that the ...The rusion or IL-2 to anti-id mAb MK2-23 which bears the internal image or human highmolecular weight melanoma-associated antigen (HMW-MAA) was used to immunize a group ofBALB/c mice. The results demonstrate that the rusion protein is capable or eliciting significant levelsof specific Abs against HMW-MAA without use of carrier proteins or adjuvants. The rusion proteinwith or without conjugating to KLR appear to be uniqu, in its ability to induce high titers of anti-anti-idAbs, whereas the mAb MK2-23 in combination with IL-2 did not. We conclude that anti-idMK2-23-IL-2 fusion protein is a potential immunogeu eliciting significant anti-tumor immunity.展开更多
文摘目的:研究Ras蛋白激活物类似物-1基因(Ras protein activator like-1,RASAL1)在正常胃黏膜上皮细胞、胃癌细胞株中的表达情况及其生物学意义。方法:采用RT-PCR和Western blot分别检测高分化胃腺癌细胞株MKN-28、中分化胃腺癌细胞株SGC-7901、低分化胃腺癌细胞株BGC-823和正常胃黏膜上皮细胞株GES-1中RASAL1基因在mRNA水平和蛋白水平的表达,应用基因测序法检测上述3种胃癌细胞株中K-Ras基因第一外显子第12密码子点突变情况,并分析其意义。结果:RT-PCR和Westernblot检测结果显示,与正常胃黏膜上皮细胞相比,在3种不同分化胃腺癌细胞株中,RASAL1基因的表达在mRNA水平和蛋白水平均下调(P<0.05),分化程度越低表达下调越明显;测序结果表明3种胃腺癌细胞株中均未发现K-Ras基因第一外显子第12密码子点突变。结论:RASAL1基因在含野生型K-Ras的胃癌细胞中呈低表达状态,其表达水平与胃癌的恶性程度有一定的关系。
文摘目的:观察+G z暴露对大鼠大脑皮层HSP70蛋白表达水平的影响,探讨+G z暴露致脑损伤的机理。方法:100只SD大鼠随机分为对照组,+2 G z暴露组,+6 G z暴露组,+10 G z暴露组,各组在G暴露后的6 h、1、2、4、6 d处死,免疫组织化学方法观察大鼠脑皮层HSP70蛋白表达情况,并对结果进行统计分析。结果:3个+G z暴露组的HSP70蛋白表达水平均显著高于对照组;不同G值之间的比较表明,+6 G z组HSP70蛋白表达水平最高,+10 G z组最低。结论:+G z暴露对大鼠大脑皮层HSP70蛋白表达水平有显著影响。
文摘The rusion or IL-2 to anti-id mAb MK2-23 which bears the internal image or human highmolecular weight melanoma-associated antigen (HMW-MAA) was used to immunize a group ofBALB/c mice. The results demonstrate that the rusion protein is capable or eliciting significant levelsof specific Abs against HMW-MAA without use of carrier proteins or adjuvants. The rusion proteinwith or without conjugating to KLR appear to be uniqu, in its ability to induce high titers of anti-anti-idAbs, whereas the mAb MK2-23 in combination with IL-2 did not. We conclude that anti-idMK2-23-IL-2 fusion protein is a potential immunogeu eliciting significant anti-tumor immunity.