目的探讨 Xklp2靶蛋白(targeting protein for Xklp2,TPX2)在肺鳞癌及其癌前病变中的表达和意义。方法 Western blot 分析 TPX2蛋白在2株肺鳞癌细胞系和4株永生化支气管上皮细胞系中的表达。逆转录聚合酶链反应分析21对新鲜肺鳞癌组织...目的探讨 Xklp2靶蛋白(targeting protein for Xklp2,TPX2)在肺鳞癌及其癌前病变中的表达和意义。方法 Western blot 分析 TPX2蛋白在2株肺鳞癌细胞系和4株永生化支气管上皮细胞系中的表达。逆转录聚合酶链反应分析21对新鲜肺鳞癌组织及其远端正常肺组织 TPX2的 mRNA表达水平。构建肺癌组织微阵列,针对其中的319例肺鳞癌患者的组织样品及其相应的114例癌前病变组织的常规石蜡切片进行 TPX2免疫组织化学(SP 法)染色,结果与临床病理参数比较分析。结果 TPX2蛋白在被测肺鳞癌和永生化支气管上皮细胞系中均有水平不一的表达。在新鲜组织标本中76.2%的肿瘤组织较正常组织 TPX2 mRNA 明显高表达。免疫组织化学分析结果显示,TPX2蛋白的表达在肿瘤组织(64.2%)中明显高于正常组织,且与肿瘤组织病理学分级、临床分期及淋巴结转移相关。TPX2蛋白在肺鳞癌的癌前病变中的表达显著高于正常组织,且随支气管上皮病变程度加重(鳞状化生、不典型增生、原位癌)而增高。结论 TPX2蛋白的表达有可能促进支气管上皮癌变和肺鳞癌进展,而且是肺鳞癌淋巴转移的危险因素。TPX2有望成为监测肺鳞癌发生发展的候选标志物。展开更多
Objective： Targeting protein for Xenopus kinesin-like protein 2 （TPX2） is a nuclear proliferation-related protein that plays a critical role in the formation of mitotic spindle. High expression of TPX2 has been obs...Objective： Targeting protein for Xenopus kinesin-like protein 2 （TPX2） is a nuclear proliferation-related protein that plays a critical role in the formation of mitotic spindle. High expression of TPX2 has been observed in several types of tumors. However, the role of TPX2 in hepatocellular carcinoma （HCC） remains unclear. Our study aimed to investigate the effect of TPX2 on HCC cell invasion. Methods： The immortalized normal human liver cell line L02 and six HCC cell lines including SMMC- 7721, BEL-7402, Huh-7, HepG2, Hep3B and SKHepl were subjected to qRT-PCR and western blot for TPX2 mRNA and protein, respectively. Furthermore, TPX2 small interfering RNA （siRNA） was used to knock down TPX2 expression in SMMC-7721 and HepG2 cells. Cell proliferation and invasion were determined by MTT and transwell assays. Otherwise, expression of p-AKT, MMP2 and MMP9 were evaluated by western blot in SMMC-7721 cells. Results： The expression of TPX2 in HCC cell lines was markedly higher than that in normal human liver cell line. TPX2 knockdown using a specific TPX2-siP, NA reduced the number of invaded cells and inhibited cell proliferation in SMMC-7721 and HepG2 cells. Furthermore, TPX2 knockdown resulted in inactivation of AKT signaling and down-regulation of MMP2 and MMP9 expression in SMMC-7721 cells. Conclusions： Our study identified that TPX2 might contribute to tumor cell invasion through activating AKT signaling and subsequently increasing MMP2 and MMP9 in HCC.展开更多
经过多年的研究,TPX2（targeting protein for Xklp2）被认为是与细胞有丝分裂和纺锤体组装相关的一个重要因素,在细胞周期的S和G2期优先存在于细胞核中。由于TPX2在多种癌症中存在高表达,它的异常表达可导致细胞中心体异常扩增、异倍...经过多年的研究,TPX2（targeting protein for Xklp2）被认为是与细胞有丝分裂和纺锤体组装相关的一个重要因素,在细胞周期的S和G2期优先存在于细胞核中。由于TPX2在多种癌症中存在高表达,它的异常表达可导致细胞中心体异常扩增、异倍体形成以及细胞癌变的发生,在恶性肿瘤的发生发展中起到原癌基因的作用,进而促进肿瘤细胞增殖、抑制凋亡、增强其侵袭及转移性。展开更多
文摘目的探讨 Xklp2靶蛋白(targeting protein for Xklp2,TPX2)在肺鳞癌及其癌前病变中的表达和意义。方法 Western blot 分析 TPX2蛋白在2株肺鳞癌细胞系和4株永生化支气管上皮细胞系中的表达。逆转录聚合酶链反应分析21对新鲜肺鳞癌组织及其远端正常肺组织 TPX2的 mRNA表达水平。构建肺癌组织微阵列,针对其中的319例肺鳞癌患者的组织样品及其相应的114例癌前病变组织的常规石蜡切片进行 TPX2免疫组织化学(SP 法)染色,结果与临床病理参数比较分析。结果 TPX2蛋白在被测肺鳞癌和永生化支气管上皮细胞系中均有水平不一的表达。在新鲜组织标本中76.2%的肿瘤组织较正常组织 TPX2 mRNA 明显高表达。免疫组织化学分析结果显示,TPX2蛋白的表达在肿瘤组织(64.2%)中明显高于正常组织,且与肿瘤组织病理学分级、临床分期及淋巴结转移相关。TPX2蛋白在肺鳞癌的癌前病变中的表达显著高于正常组织,且随支气管上皮病变程度加重(鳞状化生、不典型增生、原位癌)而增高。结论 TPX2蛋白的表达有可能促进支气管上皮癌变和肺鳞癌进展,而且是肺鳞癌淋巴转移的危险因素。TPX2有望成为监测肺鳞癌发生发展的候选标志物。
基金supported by grants from the National Natural Science Foundation of China (81272645 and 81301743)
文摘Objective： Targeting protein for Xenopus kinesin-like protein 2 （TPX2） is a nuclear proliferation-related protein that plays a critical role in the formation of mitotic spindle. High expression of TPX2 has been observed in several types of tumors. However, the role of TPX2 in hepatocellular carcinoma （HCC） remains unclear. Our study aimed to investigate the effect of TPX2 on HCC cell invasion. Methods： The immortalized normal human liver cell line L02 and six HCC cell lines including SMMC- 7721, BEL-7402, Huh-7, HepG2, Hep3B and SKHepl were subjected to qRT-PCR and western blot for TPX2 mRNA and protein, respectively. Furthermore, TPX2 small interfering RNA （siRNA） was used to knock down TPX2 expression in SMMC-7721 and HepG2 cells. Cell proliferation and invasion were determined by MTT and transwell assays. Otherwise, expression of p-AKT, MMP2 and MMP9 were evaluated by western blot in SMMC-7721 cells. Results： The expression of TPX2 in HCC cell lines was markedly higher than that in normal human liver cell line. TPX2 knockdown using a specific TPX2-siP, NA reduced the number of invaded cells and inhibited cell proliferation in SMMC-7721 and HepG2 cells. Furthermore, TPX2 knockdown resulted in inactivation of AKT signaling and down-regulation of MMP2 and MMP9 expression in SMMC-7721 cells. Conclusions： Our study identified that TPX2 might contribute to tumor cell invasion through activating AKT signaling and subsequently increasing MMP2 and MMP9 in HCC.
文摘经过多年的研究,TPX2（targeting protein for Xklp2）被认为是与细胞有丝分裂和纺锤体组装相关的一个重要因素,在细胞周期的S和G2期优先存在于细胞核中。由于TPX2在多种癌症中存在高表达,它的异常表达可导致细胞中心体异常扩增、异倍体形成以及细胞癌变的发生,在恶性肿瘤的发生发展中起到原癌基因的作用,进而促进肿瘤细胞增殖、抑制凋亡、增强其侵袭及转移性。
