Background Hypoxia-inducible factor （HIF） may play an important role in the process of tumorigenesis as well as tumor progression. The aim of this study was to compare the expression between HIF-1α and HIF-2α in t...Background Hypoxia-inducible factor （HIF） may play an important role in the process of tumorigenesis as well as tumor progression. The aim of this study was to compare the expression between HIF-1α and HIF-2α in tumor angiogenesis and the overall impact on patient prognosis in human non-small cell lung cancer （NSCLC）. Methods In the current work we compared the immunohistochemical expression of HIF-1α and HIF-21 in surgical specimens of 140 patients with NSCLC in a tissue microarray study. Relationships between HIF-α expression and clinicopathological or angiogenic factors, including prognosis, were analyzed. Results High HIF-1α and HIF-2α expression was noted in 49/140 （35.0%） and in 64/140 （45.7%） of the cases, respectively. There was no direct correlation between HIF-la and HIF-2α expression. Patients with advanced stage tumors had frequent high expression of HIF-2a （P=0.007）, and we also found a significant correlation between HIF-2α and T or N stage （P=0.030 and 0.043, respectively）. HIF-1α showed a marginal association with T stage （P=0.084）, which showed a higher expression in early stage tumors. A significant correlation （p=0.045） was noticed between HIF-1α and vascular endothelial growth factor （VEGF） expression while the expression levels of thymidine phosphorylase （TP）, cyclooxygenase （COX）-2 and microvessel density （MVD） were significantly higher in high HIF-2a tumors （P=0.020, 0.004 and 0.046, respectively）. In addition, univariate analysis of overall survival demonstrated that HIF-2a expression, but not HIF-la, was related to poor outcome （P=-0.001） and it retained significant in multivariate analysis （P=0.036）. Conclusions Taken together, we conclude that HIF-1α and HIF-2α may differentially regulate the major angiogenic factors in different stages of the tumor process in NSCLC. HIF-2α may play a dominant role in tumor angiogenesis and appears to be of obvious value as a significant prognostic factor in NSCLC.展开更多
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
AIM: To investigate let-7a expression and analyze the correlation between let-7a and progression of gastric mucosa cancerization. METHODS: The tissue microarray was constructed previously in 52 cases of human gastric ...AIM: To investigate let-7a expression and analyze the correlation between let-7a and progression of gastric mucosa cancerization. METHODS: The tissue microarray was constructed previously in 52 cases of human gastric carcinoma, 17 cases of chronic atrophic gastritis (atypical hyperplasia) and 11 cases of normal gastric tissue, and tissue microarrays combined with in situ hybridization were used to detect the expression of let-7a. RESULTS: The positive rates of let-7a in normal gastric tissue, chronic atrophic gastritis and gastric carcinoma were 90.9%, 88.2% and 86.5%, respectively, without significant differences among the groups (P > 0.05). However, an intense signal of let-7a was observed in gastric epithelial cells, whereas a less intense signal was found in gastric atypical hyperplasia epithelial cells anda weak signal in gastric carcinoma epithelial cells. The expression of let-7a decreased along with the progression of gastric mucosa cancerization (P < 0.05). In the group of gastric carcinoma, the expression of let-7a was even significantly lower in gastric carcinomas with lymph node metastasis than in those without metastasis (P < 0.05). CONCLUSION: Gastric carcinoma has relatively lower expression of let-7a. Reduced let-7a may be a fundamental factor in the formation and lymph node metastasis of gastric carcinoma.展开更多
文摘Background Hypoxia-inducible factor （HIF） may play an important role in the process of tumorigenesis as well as tumor progression. The aim of this study was to compare the expression between HIF-1α and HIF-2α in tumor angiogenesis and the overall impact on patient prognosis in human non-small cell lung cancer （NSCLC）. Methods In the current work we compared the immunohistochemical expression of HIF-1α and HIF-21 in surgical specimens of 140 patients with NSCLC in a tissue microarray study. Relationships between HIF-α expression and clinicopathological or angiogenic factors, including prognosis, were analyzed. Results High HIF-1α and HIF-2α expression was noted in 49/140 （35.0%） and in 64/140 （45.7%） of the cases, respectively. There was no direct correlation between HIF-la and HIF-2α expression. Patients with advanced stage tumors had frequent high expression of HIF-2a （P=0.007）, and we also found a significant correlation between HIF-2α and T or N stage （P=0.030 and 0.043, respectively）. HIF-1α showed a marginal association with T stage （P=0.084）, which showed a higher expression in early stage tumors. A significant correlation （p=0.045） was noticed between HIF-1α and vascular endothelial growth factor （VEGF） expression while the expression levels of thymidine phosphorylase （TP）, cyclooxygenase （COX）-2 and microvessel density （MVD） were significantly higher in high HIF-2a tumors （P=0.020, 0.004 and 0.046, respectively）. In addition, univariate analysis of overall survival demonstrated that HIF-2a expression, but not HIF-la, was related to poor outcome （P=-0.001） and it retained significant in multivariate analysis （P=0.036）. Conclusions Taken together, we conclude that HIF-1α and HIF-2α may differentially regulate the major angiogenic factors in different stages of the tumor process in NSCLC. HIF-2α may play a dominant role in tumor angiogenesis and appears to be of obvious value as a significant prognostic factor in NSCLC.
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 Research Grants from the Key Science and Technology Projects of Guangxi Zhuang Autonomous Region
文摘AIM: To investigate let-7a expression and analyze the correlation between let-7a and progression of gastric mucosa cancerization. METHODS: The tissue microarray was constructed previously in 52 cases of human gastric carcinoma, 17 cases of chronic atrophic gastritis (atypical hyperplasia) and 11 cases of normal gastric tissue, and tissue microarrays combined with in situ hybridization were used to detect the expression of let-7a. RESULTS: The positive rates of let-7a in normal gastric tissue, chronic atrophic gastritis and gastric carcinoma were 90.9%, 88.2% and 86.5%, respectively, without significant differences among the groups (P > 0.05). However, an intense signal of let-7a was observed in gastric epithelial cells, whereas a less intense signal was found in gastric atypical hyperplasia epithelial cells anda weak signal in gastric carcinoma epithelial cells. The expression of let-7a decreased along with the progression of gastric mucosa cancerization (P < 0.05). In the group of gastric carcinoma, the expression of let-7a was even significantly lower in gastric carcinomas with lymph node metastasis than in those without metastasis (P < 0.05). CONCLUSION: Gastric carcinoma has relatively lower expression of let-7a. Reduced let-7a may be a fundamental factor in the formation and lymph node metastasis of gastric carcinoma.
