目的:评价生长因子受体结合蛋白2(growth factor receptor-bound protein 2,Grb2)表达水平与结直肠癌进展及预后的关系。方法:对Grb2的蛋白表达及细胞定位进行免疫组化检测。用t检验、chi-square检验等分析Grb2的表达与年龄、性别、肿...目的:评价生长因子受体结合蛋白2(growth factor receptor-bound protein 2,Grb2)表达水平与结直肠癌进展及预后的关系。方法:对Grb2的蛋白表达及细胞定位进行免疫组化检测。用t检验、chi-square检验等分析Grb2的表达与年龄、性别、肿瘤部位、分化等级、淋巴结转移个数、TNM分期、辅助化疗、血清癌胚抗原(CEA)和血清CA19-9之间的关系。用Kaplan-Meier法分析Grb2的表达水平对患者生存率的影响;用Cox回归分析结直肠癌预后的影响因素。结果:Grb2主要表达于结直肠癌上皮细胞的胞质。结直肠癌组织中胞质Grb2的表达显著高于腺瘤和癌旁组织(P<0.05),而结肠癌组织、腺瘤、癌旁组织中胞核Grb2中的表达水平差异无统计学意义。癌上皮细胞胞质中Grb2高表达与年龄、性别、肿瘤部位、分化等级、TNM分期、辅助化疗、血清CEA、血清CA19-9之间均无相关性,Grb2表达与淋巴结转移个数有相关性(P=0.001)。Cox单因素分析发现,胞质Grb2高表达能预测患者的不良预后;进一步纳入TNM等指标,Cox多因素分析发现,Grb2是结直肠癌预后的独立影响因素[无瘤生存风险比(HR)=2.664,P=0.015;总体生存风险比(HR)=2.574,P=0.019]。结论:Grb2高表达与结直肠癌进展密切相关,是结直肠癌预后的独立危险因素。展开更多
本试验采用单核苷酸多态性(single nucleotide polymorphism,SNP)直接测序法检测猪锚蛋白重复序列和SOCS盒蛋白基因4(ankyrin repeat and SOCS box containing protein 4,Asb4)与生长因子受体结合蛋白基因10(growth factor recep-tor-bo...本试验采用单核苷酸多态性(single nucleotide polymorphism,SNP)直接测序法检测猪锚蛋白重复序列和SOCS盒蛋白基因4(ankyrin repeat and SOCS box containing protein 4,Asb4)与生长因子受体结合蛋白基因10(growth factor recep-tor-bound protein 10,Grb10)在不同组织器官中的印迹状态。首先,克隆得到了1350bp的Asb4基因cDNA序列及1811bp的Grb10基因cDNA序列,然后进行了SNP直接测序法检测。结果发现,Asb4在1月龄仔猪所有检测组织器官中均为双等位基因表达,而Grb10在1月龄仔猪的舌、肾脏、胃、小肠和脑中为父源等位基因表达,在其他组织器官中为双等位基因表达。实时定量PCR结果表明,Grb10在10种组织器官中的表达量存在显著性差异(P<0.05),其中在肺脏组织中的表达量最高,在小肠和脑中表达量最低。上述结果表明,Grb10可能是猪父源表达的印迹基因,而Asb4则属于猪非印迹基因。展开更多
Objectives: To screen for genes with altered expression in placentas from pregnancies complicated by preeclampsia. Study design: To corroborate gene expression profile of preeclamptic and normal placentas (ATLASTM Clo...Objectives: To screen for genes with altered expression in placentas from pregnancies complicated by preeclampsia. Study design: To corroborate gene expression profile of preeclamptic and normal placentas (ATLASTM Clontech), by dot blot, Northern blot analysis and RT- PCR for growth factor receptor bound- protein 2 (GRB2), using immunohistochemistry to localize its expression in the placenta. Results: Increased expression of GRB2 upregulated in the microarrays was found in preeclampsia by Dot blot and Northern blot analysis. RT- PCR performed with primers specific for GRB2 and its alternatively spliced isoform GRB3- 3 showed that most of the cDNA represented in the array was GRB2. The protein was localized to the smooth muscle wall of stem vessels by immunohistochemistry. Conclusion:The ras signalling activated by placental receptor tyrosine kinases may play a role in the segmental thickening of the stem vascular wall in preeclamptic placentas, resulting in reduced blood flow to the developing fetus.展开更多
文摘目的:评价生长因子受体结合蛋白2(growth factor receptor-bound protein 2,Grb2)表达水平与结直肠癌进展及预后的关系。方法:对Grb2的蛋白表达及细胞定位进行免疫组化检测。用t检验、chi-square检验等分析Grb2的表达与年龄、性别、肿瘤部位、分化等级、淋巴结转移个数、TNM分期、辅助化疗、血清癌胚抗原(CEA)和血清CA19-9之间的关系。用Kaplan-Meier法分析Grb2的表达水平对患者生存率的影响;用Cox回归分析结直肠癌预后的影响因素。结果:Grb2主要表达于结直肠癌上皮细胞的胞质。结直肠癌组织中胞质Grb2的表达显著高于腺瘤和癌旁组织(P<0.05),而结肠癌组织、腺瘤、癌旁组织中胞核Grb2中的表达水平差异无统计学意义。癌上皮细胞胞质中Grb2高表达与年龄、性别、肿瘤部位、分化等级、TNM分期、辅助化疗、血清CEA、血清CA19-9之间均无相关性,Grb2表达与淋巴结转移个数有相关性(P=0.001)。Cox单因素分析发现,胞质Grb2高表达能预测患者的不良预后;进一步纳入TNM等指标,Cox多因素分析发现,Grb2是结直肠癌预后的独立影响因素[无瘤生存风险比(HR)=2.664,P=0.015;总体生存风险比(HR)=2.574,P=0.019]。结论:Grb2高表达与结直肠癌进展密切相关,是结直肠癌预后的独立危险因素。
文摘本试验采用单核苷酸多态性(single nucleotide polymorphism,SNP)直接测序法检测猪锚蛋白重复序列和SOCS盒蛋白基因4(ankyrin repeat and SOCS box containing protein 4,Asb4)与生长因子受体结合蛋白基因10(growth factor recep-tor-bound protein 10,Grb10)在不同组织器官中的印迹状态。首先,克隆得到了1350bp的Asb4基因cDNA序列及1811bp的Grb10基因cDNA序列,然后进行了SNP直接测序法检测。结果发现,Asb4在1月龄仔猪所有检测组织器官中均为双等位基因表达,而Grb10在1月龄仔猪的舌、肾脏、胃、小肠和脑中为父源等位基因表达,在其他组织器官中为双等位基因表达。实时定量PCR结果表明,Grb10在10种组织器官中的表达量存在显著性差异(P<0.05),其中在肺脏组织中的表达量最高,在小肠和脑中表达量最低。上述结果表明,Grb10可能是猪父源表达的印迹基因,而Asb4则属于猪非印迹基因。
文摘Objectives: To screen for genes with altered expression in placentas from pregnancies complicated by preeclampsia. Study design: To corroborate gene expression profile of preeclamptic and normal placentas (ATLASTM Clontech), by dot blot, Northern blot analysis and RT- PCR for growth factor receptor bound- protein 2 (GRB2), using immunohistochemistry to localize its expression in the placenta. Results: Increased expression of GRB2 upregulated in the microarrays was found in preeclampsia by Dot blot and Northern blot analysis. RT- PCR performed with primers specific for GRB2 and its alternatively spliced isoform GRB3- 3 showed that most of the cDNA represented in the array was GRB2. The protein was localized to the smooth muscle wall of stem vessels by immunohistochemistry. Conclusion:The ras signalling activated by placental receptor tyrosine kinases may play a role in the segmental thickening of the stem vascular wall in preeclamptic placentas, resulting in reduced blood flow to the developing fetus.
