背景:细胞周期蛋白依赖性激酶亚基(CKS)家族在细胞周期调节中起重要作用。研究发现其家族成员CKS2在一些恶性肿瘤中呈高表达,并与肿瘤的高侵袭性行为和预后不良相关。目前关于CKS2与结直肠癌关系的文献报道较罕见。目的:研究CKS2在结直...背景:细胞周期蛋白依赖性激酶亚基(CKS)家族在细胞周期调节中起重要作用。研究发现其家族成员CKS2在一些恶性肿瘤中呈高表达,并与肿瘤的高侵袭性行为和预后不良相关。目前关于CKS2与结直肠癌关系的文献报道较罕见。目的:研究CKS2在结直肠癌中的表达和临床意义。方法:应用real time RT-PCR和蛋白质印迹法检测23例临床结直肠癌手术标本癌组织、癌旁非癌组织和正常组织中的CKS2 mRNA和蛋白表达。结果:CKS2mRNA和蛋白在结直肠组织中的相对表达量依次为:癌组织>癌旁组织>正常组织,癌组织与正常组织间差异有统计学意义(P<0.01)。性别对CKS2 mRNA在不同结直肠组织中的表达趋势无明显影响。癌组织中的CKS2蛋白表达与肿瘤大小和pTNM分期呈正相关(P<0.01),与肿瘤部位无关。结论:CKS2蛋白在结直肠癌中呈高表达并与肿瘤临床病理特征相关,有望成为结直肠癌新的分子标记物和治疗靶点。展开更多
Deregulation of the cell cycle results in loss of normal control mechanisms that prevent aberrant cell proliferation and cancer progression. Regulation of the cell cycle is a highly complex process with many layers of...Deregulation of the cell cycle results in loss of normal control mechanisms that prevent aberrant cell proliferation and cancer progression. Regulation of the cell cycle is a highly complex process with many layers of control. One of these mechanisms involves timely degradation of CDK inhibitors (CKIs) like p27Kip1 by the ubiquitin proteasomal system (UPS). Cks1 is a 9 kDa protein which is frequently overexpressed in different tumor subtypes, and has pleiotropic roles in cell cycle progression, many of which remain to be fully characterized. One well characterized molecular role of Cks1 is that of an essential adaptor that regulates p27Kip1 abundance by facilitating its interaction with the SCF-Skp2 E3 ligase which appends ubiquitin to p27Kip1 and targets it for degradation through the UPS. In addition, emerging research has uncovered p27Kip1-independent roles of Cks1 which have provided crucial insights into how it may be involved in cancer progression. We review here the structural features of Cks1 and their functional implications, and also some recently identified Cks1 roles and their involvement in breast and other cancers.展开更多
文摘背景:细胞周期蛋白依赖性激酶亚基(CKS)家族在细胞周期调节中起重要作用。研究发现其家族成员CKS2在一些恶性肿瘤中呈高表达,并与肿瘤的高侵袭性行为和预后不良相关。目前关于CKS2与结直肠癌关系的文献报道较罕见。目的:研究CKS2在结直肠癌中的表达和临床意义。方法:应用real time RT-PCR和蛋白质印迹法检测23例临床结直肠癌手术标本癌组织、癌旁非癌组织和正常组织中的CKS2 mRNA和蛋白表达。结果:CKS2mRNA和蛋白在结直肠组织中的相对表达量依次为:癌组织>癌旁组织>正常组织,癌组织与正常组织间差异有统计学意义(P<0.01)。性别对CKS2 mRNA在不同结直肠组织中的表达趋势无明显影响。癌组织中的CKS2蛋白表达与肿瘤大小和pTNM分期呈正相关(P<0.01),与肿瘤部位无关。结论:CKS2蛋白在结直肠癌中呈高表达并与肿瘤临床病理特征相关,有望成为结直肠癌新的分子标记物和治疗靶点。
文摘Deregulation of the cell cycle results in loss of normal control mechanisms that prevent aberrant cell proliferation and cancer progression. Regulation of the cell cycle is a highly complex process with many layers of control. One of these mechanisms involves timely degradation of CDK inhibitors (CKIs) like p27Kip1 by the ubiquitin proteasomal system (UPS). Cks1 is a 9 kDa protein which is frequently overexpressed in different tumor subtypes, and has pleiotropic roles in cell cycle progression, many of which remain to be fully characterized. One well characterized molecular role of Cks1 is that of an essential adaptor that regulates p27Kip1 abundance by facilitating its interaction with the SCF-Skp2 E3 ligase which appends ubiquitin to p27Kip1 and targets it for degradation through the UPS. In addition, emerging research has uncovered p27Kip1-independent roles of Cks1 which have provided crucial insights into how it may be involved in cancer progression. We review here the structural features of Cks1 and their functional implications, and also some recently identified Cks1 roles and their involvement in breast and other cancers.
