目的:研究腺病毒介导的肿瘤生长抑制因子4(inhibitor of growth family 4,ING4)联合放疗对肺腺癌SPC-A1细胞移植瘤生长的抑制作用。方法:制备SPC-A1细胞荷瘤小鼠模型,随机分为PBS组、Ad组、Ad-ING4组、放疗组、Ad-ING4+放疗组。测量各...目的:研究腺病毒介导的肿瘤生长抑制因子4(inhibitor of growth family 4,ING4)联合放疗对肺腺癌SPC-A1细胞移植瘤生长的抑制作用。方法:制备SPC-A1细胞荷瘤小鼠模型,随机分为PBS组、Ad组、Ad-ING4组、放疗组、Ad-ING4+放疗组。测量各组荷瘤小鼠移植瘤的体积变化,治疗15 d后摘取瘤块,称质量并计算抑瘤率;H-E染色观察瘤体组织细胞的形态学变化,免疫组化法检测瘤体组织中Bax、caspase-3、Bcl-2、VEGF等因子的表达。结果:治疗后第15天SPC-A1移植瘤体积:Ad-ING4组为(1 136.03±151.58)mm3、单纯放疗组为(1 035.67±86.27)mm3、Ad-ING4+放疗组为(743.84±109.06)mm3,联合组可有效抑制肿瘤生长(P<0.01);此外,联合组抑瘤率也显著高于单纯Ad-ING4组或放疗组(69.62%vs 33.17%、35.41%,P<0.01),呈现放疗增敏协同作用(Q=1.22)。免疫组化结果显示,Ad-ING4及其联合放疗组能明显上调Bax、caspase-3等蛋白的表达,下调Bcl-2、VEGF等蛋白的表达,且Ad-ING4+放疗组对这些蛋白表达的调节作用强于Ad-ING4组、单纯放疗组(P<0.01)。结论:Ad-ING4联合放疗可有效抑制肺腺癌SPC-A1细胞移植瘤的生长。展开更多
目的:检测腺病毒介导的生长抑制基因4(adenovirus-mediated inhibitor of growth family member 4,Ad-ING4)感染后ECV304细胞体外生长及分泌血管内皮生长因子(vascular endothelial growth factor,VEGF)的影响,探讨ING4抑制肿瘤生长的...目的:检测腺病毒介导的生长抑制基因4(adenovirus-mediated inhibitor of growth family member 4,Ad-ING4)感染后ECV304细胞体外生长及分泌血管内皮生长因子(vascular endothelial growth factor,VEGF)的影响,探讨ING4抑制肿瘤生长的可能机制。方法:构建ING4腺病毒载体,用MTT法检测Ad-ING4感染后ECV304细胞体外生长影响,ELISA检测VEGF的分泌情况。结果:Ad-ING4感染后第3天和第4天ECV304细胞体外生长均受到抑制(P<0.01),第4天时抑制率达63.6%,VEGF分泌受到抑制。结论:ING4能抑制ECV304细胞生长及VEGF分泌。Ad-ING4能抑制血管内皮细胞生长和血管的生成,从而可抑制体内肿瘤的生长。展开更多
目的探讨ING4(inhibitor of growth family 4)蛋白对人胶质瘤U251细胞增殖及凋亡的影响。方法用PEI转染ING4蛋白过表达(pEGFP-C2/ING4转染组)及阴性对照载体(pEGFP-C2转染组)至人胶质瘤U251细胞,G418筛选后建立ING4蛋白稳定表达细胞株;R...目的探讨ING4(inhibitor of growth family 4)蛋白对人胶质瘤U251细胞增殖及凋亡的影响。方法用PEI转染ING4蛋白过表达(pEGFP-C2/ING4转染组)及阴性对照载体(pEGFP-C2转染组)至人胶质瘤U251细胞,G418筛选后建立ING4蛋白稳定表达细胞株;RT-PCR、免疫组化、Western blot检测ING4蛋白的表达,MTT法和Hochest法检测U251细胞的增殖和凋亡。结果 pEGFP-C2/ING4转染组和pEGFP-C2转染组转染U251细胞效率分别为84%和82%;RT-PCR、免疫组化、Western blot均检测到pEGFP-ING4转染组ING4的强表达;与pEGFP-C2转染组和空白对照组相比,pEGFP-C2/ING4转染组的U251细胞72 h后生长抑制率和凋亡率有统计学差异(P<0.05)。结论 ING4蛋白对胶质瘤U251细胞有显著的增殖抑制和诱导凋亡作用。展开更多
AIM:To evaluate the biological and clinical characteristics of miR-622 in gastric cancer. METHODS:We analyzed the expression of miR-622 in 57 pair matched gastric neoplastic and adjacent non-neoplastic tissues by quan...AIM:To evaluate the biological and clinical characteristics of miR-622 in gastric cancer. METHODS:We analyzed the expression of miR-622 in 57 pair matched gastric neoplastic and adjacent non-neoplastic tissues by quantitative real-time polymerase chain reaction. Functional analysis of miR-622 expression was assessed in vitro in gastric cancer cell lines with miR-622 precursor and inhibitor. The roles of miR-622 in tumorigenesis and tumor metastasis were analyzed using a stable miR-622 expression plasmid in nude mice. A luciferase reporter assay was used to assess the effect of miR-622 on inhibitor of growth family,member 1 (ING1) expression. RESULTS:Expression of miR-622 was down-regulated in gastric cancer. MiR-622 was found involved in differentia-tion and lymphatic metastasis in human gastric cancer. Ectopic expression of miR-622 promoted invasion,tumorigenesis and metastasis of gastric cancer cells both in vitro and in vivo. ING1 is a direct target of miR-622. CONCLUSION:These findings help clarify the molecular mechanisms involved in gastric cancer metastasis and indicate that miR-622 modulation may be a bona fide treatment of gastric cancer.展开更多
生长抑制因子家族(inhibitor of growth family,ING)ING1-ING5,被认为是候选肿瘤抑制基因家族,ING3(inhibitor of growth family member 3)在人类正常组织中广泛表达,在多数恶性肿瘤中ING3表达下调,如头颈部鳞状细胞癌、人皮肤恶性黑色...生长抑制因子家族(inhibitor of growth family,ING)ING1-ING5,被认为是候选肿瘤抑制基因家族,ING3(inhibitor of growth family member 3)在人类正常组织中广泛表达,在多数恶性肿瘤中ING3表达下调,如头颈部鳞状细胞癌、人皮肤恶性黑色素瘤、肝癌等,并且起到抑制肿瘤发生发展的作用。然而,新近的研究发现,ING3促进了前列腺癌的发展。本文将对ING3在不同类型的恶性肿瘤中可能起到不同的作用作一综述。展开更多
文摘目的:研究腺病毒介导的肿瘤生长抑制因子4(inhibitor of growth family 4,ING4)联合放疗对肺腺癌SPC-A1细胞移植瘤生长的抑制作用。方法:制备SPC-A1细胞荷瘤小鼠模型,随机分为PBS组、Ad组、Ad-ING4组、放疗组、Ad-ING4+放疗组。测量各组荷瘤小鼠移植瘤的体积变化,治疗15 d后摘取瘤块,称质量并计算抑瘤率;H-E染色观察瘤体组织细胞的形态学变化,免疫组化法检测瘤体组织中Bax、caspase-3、Bcl-2、VEGF等因子的表达。结果:治疗后第15天SPC-A1移植瘤体积:Ad-ING4组为(1 136.03±151.58)mm3、单纯放疗组为(1 035.67±86.27)mm3、Ad-ING4+放疗组为(743.84±109.06)mm3,联合组可有效抑制肿瘤生长(P<0.01);此外,联合组抑瘤率也显著高于单纯Ad-ING4组或放疗组(69.62%vs 33.17%、35.41%,P<0.01),呈现放疗增敏协同作用(Q=1.22)。免疫组化结果显示,Ad-ING4及其联合放疗组能明显上调Bax、caspase-3等蛋白的表达,下调Bcl-2、VEGF等蛋白的表达,且Ad-ING4+放疗组对这些蛋白表达的调节作用强于Ad-ING4组、单纯放疗组(P<0.01)。结论:Ad-ING4联合放疗可有效抑制肺腺癌SPC-A1细胞移植瘤的生长。
文摘目的:检测腺病毒介导的生长抑制基因4(adenovirus-mediated inhibitor of growth family member 4,Ad-ING4)感染后ECV304细胞体外生长及分泌血管内皮生长因子(vascular endothelial growth factor,VEGF)的影响,探讨ING4抑制肿瘤生长的可能机制。方法:构建ING4腺病毒载体,用MTT法检测Ad-ING4感染后ECV304细胞体外生长影响,ELISA检测VEGF的分泌情况。结果:Ad-ING4感染后第3天和第4天ECV304细胞体外生长均受到抑制(P<0.01),第4天时抑制率达63.6%,VEGF分泌受到抑制。结论:ING4能抑制ECV304细胞生长及VEGF分泌。Ad-ING4能抑制血管内皮细胞生长和血管的生成,从而可抑制体内肿瘤的生长。
文摘目的探讨ING4(inhibitor of growth family 4)蛋白对人胶质瘤U251细胞增殖及凋亡的影响。方法用PEI转染ING4蛋白过表达(pEGFP-C2/ING4转染组)及阴性对照载体(pEGFP-C2转染组)至人胶质瘤U251细胞,G418筛选后建立ING4蛋白稳定表达细胞株;RT-PCR、免疫组化、Western blot检测ING4蛋白的表达,MTT法和Hochest法检测U251细胞的增殖和凋亡。结果 pEGFP-C2/ING4转染组和pEGFP-C2转染组转染U251细胞效率分别为84%和82%;RT-PCR、免疫组化、Western blot均检测到pEGFP-ING4转染组ING4的强表达;与pEGFP-C2转染组和空白对照组相比,pEGFP-C2/ING4转染组的U251细胞72 h后生长抑制率和凋亡率有统计学差异(P<0.05)。结论 ING4蛋白对胶质瘤U251细胞有显著的增殖抑制和诱导凋亡作用。
基金Supported by Grants from Science Foundation of Shandong Province of China (2003-23)Key Research Project from Shan-dong Science and Technology Commission, No. 2005GG3202066
文摘AIM:To evaluate the biological and clinical characteristics of miR-622 in gastric cancer. METHODS:We analyzed the expression of miR-622 in 57 pair matched gastric neoplastic and adjacent non-neoplastic tissues by quantitative real-time polymerase chain reaction. Functional analysis of miR-622 expression was assessed in vitro in gastric cancer cell lines with miR-622 precursor and inhibitor. The roles of miR-622 in tumorigenesis and tumor metastasis were analyzed using a stable miR-622 expression plasmid in nude mice. A luciferase reporter assay was used to assess the effect of miR-622 on inhibitor of growth family,member 1 (ING1) expression. RESULTS:Expression of miR-622 was down-regulated in gastric cancer. MiR-622 was found involved in differentia-tion and lymphatic metastasis in human gastric cancer. Ectopic expression of miR-622 promoted invasion,tumorigenesis and metastasis of gastric cancer cells both in vitro and in vivo. ING1 is a direct target of miR-622. CONCLUSION:These findings help clarify the molecular mechanisms involved in gastric cancer metastasis and indicate that miR-622 modulation may be a bona fide treatment of gastric cancer.
文摘生长抑制因子家族(inhibitor of growth family,ING)ING1-ING5,被认为是候选肿瘤抑制基因家族,ING3(inhibitor of growth family member 3)在人类正常组织中广泛表达,在多数恶性肿瘤中ING3表达下调,如头颈部鳞状细胞癌、人皮肤恶性黑色素瘤、肝癌等,并且起到抑制肿瘤发生发展的作用。然而,新近的研究发现,ING3促进了前列腺癌的发展。本文将对ING3在不同类型的恶性肿瘤中可能起到不同的作用作一综述。
