缺氧诱导因子-1α和血管内皮素-1及血管内皮生长因子在胃肠道间质瘤中的表达及意义

目的 探讨缺氧诱导因子-1α(HIF-1α)、血管内皮素-1(ET-1)和血管内皮生长因子(VEGF)在胃肠道间质瘤(GIST)中的表达关系及其对患者预后判断的价值.方法 收集2003年1月至2006年12月中南大学湘雅医院(50例)、湖南省邵阳市中医院(36例)行手术治疗的86例GIST患者肿瘤标本,采用免疫组织化学染色方法检测标本中HIF-1 α、ET-1和VEGF的表达.计数资料采用x2检验,应用Spearman等级相关分析处理HIF-1α、ET-1和VEGF之间的相关性.Kaplan-Meier法计算患者生存率,生存分析比较采用Log-rank检验.结果 86例患者中,HIF-1α阴性23例、阳性30例、强阳性33例,阳性表达率为73.3％(63/86);ET-1阴性29例、阳性28例、强阳性29例,阳性表达率为66.3％ (57/86);VEGF阴性24例、阳性26例、强阳性36例,阳性表达率为72.1％(62/86).HIF-1α、ET-1和VEGF的表达两两均呈正相关(r=0.594,0.655,0.347,P＜0.05);上述3种检测指标与GIST的美国国立卫生研究院(NIH)危险度分级、浸润转移、肿瘤直径和核分裂象有关(x2=15.565、10.841、12.574、21.125,8.171、10.002、10.354、17.317,14.710、16.230、11.116、18.886,P＜0.05);而与患者的性别、年龄、肿瘤原发部位无关(x2=0.059、0.071、5.070,0.468、0.074、1.665,0.231、0.370、3.712,P＞0.05);进一步分析发现:上述3种检测指标阳性表达率随GIST NIH危险度分级的升高、出现浸润转移和肿瘤直径的增大而增加.86例患者随访率为91.9％(79/86),3、5年生存率分别为82％和69％.中位随访时间为40.2个月(2～66个月).HIF-1α、ET-1和VEGF阳性患者的5年生存率分别为42％、45％和42％,显著低于阴性患者的64％、65％和63％(x2=6.325,6.124,6.287,P＜0.05).结论 HIF-1α、ET-1和VEGF在GIST中的表达两两呈正相关,这3种检测指标提示肿瘤的恶性程度及患者预后.     

Expression and significance of HIF-1α and ET-1 in gastrointestinal stromal tumors

Objective To explore the expression and the value of HIF-1α,and ET-1 in judging the prognosis of gastrointestinal stromal tumors (GISTs). Methods The expression of HIF-1α, and ET-1 protein was examined in 76 GISTs by immunohistochemistry S -P methods. Results There was a positive correlation between the expression of HIF-1 α and ET-1 ( P < 0.05 ). The positive expression rate of HIF-1 α and ET-1 was 73.68% (50/76) ,and 65.79% (50/76) respectively,which was related with histologicial grade, tumor diameter, infiltration and metastasis, nuclear division rating of GISTs ( P < 0.05 ), but had no relationship with patients' age, gender, initial position of the tumor ( P > 0.05 ). There was statistically sig-nificant difference in the expression of HIF-1 α and ET-1 in the following groups:among the three classes of very low-risk and low-risk, middle-risk, high-risk, bewteen the diameter < 2 cm and > 5 cm (P < 0.05). The more malignant degree and larger diameter, the more highly positive expression rate ( P < 0.05 ). The positive expression in the groups with infiltration and metastasis, and nuclear division ≥5/50 HP was sig-nificantly higher than the groups without infiltration and metastasis, and nuclear division < 5/50 HP (P < 0.05). Conclusion The expression of HIF-1α had a significant correlation with ET-1. HIF-1α,and ET-1 expression was closely related with the prognosis of GISTs,and can serve as important predictors for survival.     

Expression and significance of HIF-1α and ET-1 in gastrointestinal stromal tumors

Objective To explore the expression and the value of HIF-1α,and ET-1 in judging the prognosis of gastrointestinal stromal tumors (GISTs). Methods The expression of HIF-1α, and ET-1 protein was examined in 76 GISTs by immunohistochemistry S -P methods. Results There was a positive correlation between the expression of HIF-1 α and ET-1 ( P < 0.05 ). The positive expression rate of HIF-1 α and ET-1 was 73.68% (50/76) ,and 65.79% (50/76) respectively,which was related with histologicial grade, tumor diameter, infiltration and metastasis, nuclear division rating of GISTs ( P < 0.05 ), but had no relationship with patients' age, gender, initial position of the tumor ( P > 0.05 ). There was statistically sig-nificant difference in the expression of HIF-1 α and ET-1 in the following groups:among the three classes of very low-risk and low-risk, middle-risk, high-risk, bewteen the diameter < 2 cm and > 5 cm (P < 0.05). The more malignant degree and larger diameter, the more highly positive expression rate ( P < 0.05 ). The positive expression in the groups with infiltration and metastasis, and nuclear division ≥5/50 HP was sig-nificantly higher than the groups without infiltration and metastasis, and nuclear division < 5/50 HP (P < 0.05). Conclusion The expression of HIF-1α had a significant correlation with ET-1. HIF-1α,and ET-1 expression was closely related with the prognosis of GISTs,and can serve as important predictors for survival.     

Expression and significance of HIF-1α and ET-1 in gastrointestinal stromal tumors

Objective To explore the expression and the value of HIF-1α,and ET-1 in judging the prognosis of gastrointestinal stromal tumors (GISTs). Methods The expression of HIF-1α, and ET-1 protein was examined in 76 GISTs by immunohistochemistry S -P methods. Results There was a positive correlation between the expression of HIF-1 α and ET-1 ( P < 0.05 ). The positive expression rate of HIF-1 α and ET-1 was 73.68% (50/76) ,and 65.79% (50/76) respectively,which was related with histologicial grade, tumor diameter, infiltration and metastasis, nuclear division rating of GISTs ( P < 0.05 ), but had no relationship with patients' age, gender, initial position of the tumor ( P > 0.05 ). There was statistically sig-nificant difference in the expression of HIF-1 α and ET-1 in the following groups:among the three classes of very low-risk and low-risk, middle-risk, high-risk, bewteen the diameter < 2 cm and > 5 cm (P < 0.05). The more malignant degree and larger diameter, the more highly positive expression rate ( P < 0.05 ). The positive expression in the groups with infiltration and metastasis, and nuclear division ≥5/50 HP was sig-nificantly higher than the groups without infiltration and metastasis, and nuclear division < 5/50 HP (P < 0.05). Conclusion The expression of HIF-1α had a significant correlation with ET-1. HIF-1α,and ET-1 expression was closely related with the prognosis of GISTs,and can serve as important predictors for survival.     

Expression and significance of HIF-1α and ET-1 in gastrointestinal stromal tumors

Objective To explore the expression and the value of HIF-1α,and ET-1 in judging the prognosis of gastrointestinal stromal tumors (GISTs). Methods The expression of HIF-1α, and ET-1 protein was examined in 76 GISTs by immunohistochemistry S -P methods. Results There was a positive correlation between the expression of HIF-1 α and ET-1 ( P < 0.05 ). The positive expression rate of HIF-1 α and ET-1 was 73.68% (50/76) ,and 65.79% (50/76) respectively,which was related with histologicial grade, tumor diameter, infiltration and metastasis, nuclear division rating of GISTs ( P < 0.05 ), but had no relationship with patients' age, gender, initial position of the tumor ( P > 0.05 ). There was statistically sig-nificant difference in the expression of HIF-1 α and ET-1 in the following groups:among the three classes of very low-risk and low-risk, middle-risk, high-risk, bewteen the diameter < 2 cm and > 5 cm (P < 0.05). The more malignant degree and larger diameter, the more highly positive expression rate ( P < 0.05 ). The positive expression in the groups with infiltration and metastasis, and nuclear division ≥5/50 HP was sig-nificantly higher than the groups without infiltration and metastasis, and nuclear division < 5/50 HP (P < 0.05). Conclusion The expression of HIF-1α had a significant correlation with ET-1. HIF-1α,and ET-1 expression was closely related with the prognosis of GISTs,and can serve as important predictors for survival.     

Expression and significance of HIF-1α and ET-1 in gastrointestinal stromal tumors

Objective To explore the expression and the value of HIF-1α,and ET-1 in judging the prognosis of gastrointestinal stromal tumors (GISTs). Methods The expression of HIF-1α, and ET-1 protein was examined in 76 GISTs by immunohistochemistry S -P methods. Results There was a positive correlation between the expression of HIF-1 α and ET-1 ( P < 0.05 ). The positive expression rate of HIF-1 α and ET-1 was 73.68% (50/76) ,and 65.79% (50/76) respectively,which was related with histologicial grade, tumor diameter, infiltration and metastasis, nuclear division rating of GISTs ( P < 0.05 ), but had no relationship with patients' age, gender, initial position of the tumor ( P > 0.05 ). There was statistically sig-nificant difference in the expression of HIF-1 α and ET-1 in the following groups:among the three classes of very low-risk and low-risk, middle-risk, high-risk, bewteen the diameter < 2 cm and > 5 cm (P < 0.05). The more malignant degree and larger diameter, the more highly positive expression rate ( P < 0.05 ). The positive expression in the groups with infiltration and metastasis, and nuclear division ≥5/50 HP was sig-nificantly higher than the groups without infiltration and metastasis, and nuclear division < 5/50 HP (P < 0.05). Conclusion The expression of HIF-1α had a significant correlation with ET-1. HIF-1α,and ET-1 expression was closely related with the prognosis of GISTs,and can serve as important predictors for survival.     

Expression and significance of HIF-1α and ET-1 in gastrointestinal stromal tumors

Objective To explore the expression and the value of HIF-1α,and ET-1 in judging the prognosis of gastrointestinal stromal tumors (GISTs). Methods The expression of HIF-1α, and ET-1 protein was examined in 76 GISTs by immunohistochemistry S -P methods. Results There was a positive correlation between the expression of HIF-1 α and ET-1 ( P < 0.05 ). The positive expression rate of HIF-1 α and ET-1 was 73.68% (50/76) ,and 65.79% (50/76) respectively,which was related with histologicial grade, tumor diameter, infiltration and metastasis, nuclear division rating of GISTs ( P < 0.05 ), but had no relationship with patients' age, gender, initial position of the tumor ( P > 0.05 ). There was statistically sig-nificant difference in the expression of HIF-1 α and ET-1 in the following groups:among the three classes of very low-risk and low-risk, middle-risk, high-risk, bewteen the diameter < 2 cm and > 5 cm (P < 0.05). The more malignant degree and larger diameter, the more highly positive expression rate ( P < 0.05 ). The positive expression in the groups with infiltration and metastasis, and nuclear division ≥5/50 HP was sig-nificantly higher than the groups without infiltration and metastasis, and nuclear division < 5/50 HP (P < 0.05). Conclusion The expression of HIF-1α had a significant correlation with ET-1. HIF-1α,and ET-1 expression was closely related with the prognosis of GISTs,and can serve as important predictors for survival.     

Expression and significance of HIF-1α and ET-1 in gastrointestinal stromal tumors

Objective To explore the expression and the value of HIF-1α,and ET-1 in judging the prognosis of gastrointestinal stromal tumors (GISTs). Methods The expression of HIF-1α, and ET-1 protein was examined in 76 GISTs by immunohistochemistry S -P methods. Results There was a positive correlation between the expression of HIF-1 α and ET-1 ( P < 0.05 ). The positive expression rate of HIF-1 α and ET-1 was 73.68% (50/76) ,and 65.79% (50/76) respectively,which was related with histologicial grade, tumor diameter, infiltration and metastasis, nuclear division rating of GISTs ( P < 0.05 ), but had no relationship with patients' age, gender, initial position of the tumor ( P > 0.05 ). There was statistically sig-nificant difference in the expression of HIF-1 α and ET-1 in the following groups:among the three classes of very low-risk and low-risk, middle-risk, high-risk, bewteen the diameter < 2 cm and > 5 cm (P < 0.05). The more malignant degree and larger diameter, the more highly positive expression rate ( P < 0.05 ). The positive expression in the groups with infiltration and metastasis, and nuclear division ≥5/50 HP was sig-nificantly higher than the groups without infiltration and metastasis, and nuclear division < 5/50 HP (P < 0.05). Conclusion The expression of HIF-1α had a significant correlation with ET-1. HIF-1α,and ET-1 expression was closely related with the prognosis of GISTs,and can serve as important predictors for survival.     

Expression and significance of HIF-1α and ET-1 in gastrointestinal stromal tumors

Objective To explore the expression and the value of HIF-1α,and ET-1 in judging the prognosis of gastrointestinal stromal tumors (GISTs). Methods The expression of HIF-1α, and ET-1 protein was examined in 76 GISTs by immunohistochemistry S -P methods. Results There was a positive correlation between the expression of HIF-1 α and ET-1 ( P < 0.05 ). The positive expression rate of HIF-1 α and ET-1 was 73.68% (50/76) ,and 65.79% (50/76) respectively,which was related with histologicial grade, tumor diameter, infiltration and metastasis, nuclear division rating of GISTs ( P < 0.05 ), but had no relationship with patients' age, gender, initial position of the tumor ( P > 0.05 ). There was statistically sig-nificant difference in the expression of HIF-1 α and ET-1 in the following groups:among the three classes of very low-risk and low-risk, middle-risk, high-risk, bewteen the diameter < 2 cm and > 5 cm (P < 0.05). The more malignant degree and larger diameter, the more highly positive expression rate ( P < 0.05 ). The positive expression in the groups with infiltration and metastasis, and nuclear division ≥5/50 HP was sig-nificantly higher than the groups without infiltration and metastasis, and nuclear division < 5/50 HP (P < 0.05). Conclusion The expression of HIF-1α had a significant correlation with ET-1. HIF-1α,and ET-1 expression was closely related with the prognosis of GISTs,and can serve as important predictors for survival.     

Expression and significance of HIF-1α and ET-1 in gastrointestinal stromal tumors

Objective To explore the expression and the value of HIF-1α,and ET-1 in judging the prognosis of gastrointestinal stromal tumors (GISTs). Methods The expression of HIF-1α, and ET-1 protein was examined in 76 GISTs by immunohistochemistry S -P methods. Results There was a positive correlation between the expression of HIF-1 α and ET-1 ( P < 0.05 ). The positive expression rate of HIF-1 α and ET-1 was 73.68% (50/76) ,and 65.79% (50/76) respectively,which was related with histologicial grade, tumor diameter, infiltration and metastasis, nuclear division rating of GISTs ( P < 0.05 ), but had no relationship with patients' age, gender, initial position of the tumor ( P > 0.05 ). There was statistically sig-nificant difference in the expression of HIF-1 α and ET-1 in the following groups:among the three classes of very low-risk and low-risk, middle-risk, high-risk, bewteen the diameter < 2 cm and > 5 cm (P < 0.05). The more malignant degree and larger diameter, the more highly positive expression rate ( P < 0.05 ). The positive expression in the groups with infiltration and metastasis, and nuclear division ≥5/50 HP was sig-nificantly higher than the groups without infiltration and metastasis, and nuclear division < 5/50 HP (P < 0.05). Conclusion The expression of HIF-1α had a significant correlation with ET-1. HIF-1α,and ET-1 expression was closely related with the prognosis of GISTs,and can serve as important predictors for survival.     

Expression and significance of HIF-1α and ET-1 in gastrointestinal stromal tumors

Objective To explore the expression and the value of HIF-1α,and ET-1 in judging the prognosis of gastrointestinal stromal tumors (GISTs). Methods The expression of HIF-1α, and ET-1 protein was examined in 76 GISTs by immunohistochemistry S -P methods. Results There was a positive correlation between the expression of HIF-1 α and ET-1 ( P < 0.05 ). The positive expression rate of HIF-1 α and ET-1 was 73.68% (50/76) ,and 65.79% (50/76) respectively,which was related with histologicial grade, tumor diameter, infiltration and metastasis, nuclear division rating of GISTs ( P < 0.05 ), but had no relationship with patients' age, gender, initial position of the tumor ( P > 0.05 ). There was statistically sig-nificant difference in the expression of HIF-1 α and ET-1 in the following groups:among the three classes of very low-risk and low-risk, middle-risk, high-risk, bewteen the diameter < 2 cm and > 5 cm (P < 0.05). The more malignant degree and larger diameter, the more highly positive expression rate ( P < 0.05 ). The positive expression in the groups with infiltration and metastasis, and nuclear division ≥5/50 HP was sig-nificantly higher than the groups without infiltration and metastasis, and nuclear division < 5/50 HP (P < 0.05). Conclusion The expression of HIF-1α had a significant correlation with ET-1. HIF-1α,and ET-1 expression was closely related with the prognosis of GISTs,and can serve as important predictors for survival.     

大肠癌组织中TGF-β1和HIF-1α和VEGF的表达及其临床意义

目的:通过检测转化生长因子β1(TGF-β1)、缺氧诱导因子-1α(HIF-1α)和血管内皮生长因子(VEGF)在大肠癌及癌旁组织中的表达情况,探讨其临床意义和预后价值。方法:采用免疫组织化学法检测100例大肠癌及相应的癌旁组织中TGF-β1、HIF-1α和VEGF的表达,分析其表达与大肠癌临床病理特征及预后的关系。结果:1)TGF-β1、HIF-1α和VEGF在大肠癌组织中阳性率分别为63%、59%和63%;在癌旁组织中阳性率分别为11%、22%和13%,三者在大肠癌组织中的表达明显高于癌旁组织(P0.05)。2)TGF-β1的表达与肿瘤的浸润深度明显相关(P0.05);HIF-1α、VEGF的表达与肿瘤的分化程度、浸润深度、淋巴结转移、远处转移及TNM分期明显相关(P0.05)。3)TGF-β1、HIF-1α与VEGF在大肠癌组织中的表达呈正相关(P0.05、P0.01);生存单因素分析显示HIF-1α、VEGF均与患者的预后有关(P均0.05)。结论:大肠癌组织中TGF-β1、HIF-1α、VEGF表达与肿瘤的生物学特征密切相关,可能是肿瘤侵袭转移的机制之一;联合检测TGF-β1、HIF-1α、VEGF对预测肿瘤侵袭转移及判断预后具有一定价值。     

缺氧诱导因子-α和血管内皮素-1及血管内皮生长因子在胃肠道间质瘤中的表达及意义

目的探讨缺氧诱导因子-1α（HIF-1α）、血管内皮素-1（ET-1）和血管内皮生长因子（VEGF）在胃肠道间质瘤（GIST）中的表达关系及其对患者预后判断的价值。方法收集2003年1月至2006年12月中南大学湘雅医院（50例）、湖南省邵阳市中医院（36例）行手术治疗的86例GIST患者肿瘤标本,采用免疫组织化学染色方法检测标本中HIF-1α、ET-1和VEGF的表达。计数资料采用r检验,应用Spearman等级相关分析处理HIF-1α、ET-1和VEGF之间的相关性。Kaplan—Meier法计算患者生存率,生存分析比较采用Log—rank检验。结果86例患者中,HIF-1仅阴性23例、阳性30例、强阳性33例,阳性表达率为73．3％（63／86）;ET-1阴性29例、阳性28例、强阳性29例,阳性表达率为66．3％（57／86）;VEGF阴性24例、阳性26例、强阳性36例,阳性表达率为72．1％（62／86）。HIF-1α、ET-1和VEGF的表达两两均呈正相关（r=0．594,0．655,0．347,P〈0．05）;上述3种检测指标与GIST的美国国立卫生研究院（NIH）危险度分级、浸润转移、肿瘤直径和核分裂象有关（,=15．565、10．841、12．574、21．125,8．171、10．002、10．354、17．317,14．710、16．230、11．116、18．886,P〈0．05）;而与患者的性别、年龄、肿瘤原发部位无关（X2=0．059、0．071、5．070,0．468、0．074、1．665,0．231、0．370、3．712,P〉0．05）;进-步分析发现：上述3种检测指标阳性表达率随GISTNIH危险度分级的升高、出现浸润转移和肿瘤直径的增大而增加。86例患者随访率为91．9％（79／86）,3、5年生存率分别为82％和69％。中位随访时间为40．2个月（2—66个月）。HIF-1仪、ET．1和VEGF阳性患者的5年生存率分别为42％、45％和42％,显著低于阴性患者的64％、65％和63％（,=6．325,6．124,6．287,P〈0．05）。结论HIF-1d、ET-1和VEGF在GIST中的表达两两呈正相关,这3种检测指标提示肿瘤的恶性程度及患者预后。     

缺氧诱导因子-1α和血红素加氧酶-1在胃癌组织中的表达和临床意义

目的 研究缺氧诱导因子-1α（hypoxia inducible factor-1α,HIF-1α）和血红素加氧酶-1（heme oxygenase-1,HO-1）在胃癌组织中的表达,探讨它们在胃癌发生发展、浸润和转移中的作用.方法 应用免疫组织化学SP法检测96例胃癌组织中HIF-1α和HO-1的表达,分析其临床意义及两者之间的相关性.结果 胃癌组织中HIF-1α和HO-1的阳性表达率为73.96%和70.83%,明显高于正常胃组织中的表达水平,差异有统计学意义（P〈0.05）.HIF-1α和HO-1的表达与胃癌的不同组织学分级、临床TNM分期、浸润深度和淋巴结转移有关（P〈0.05或P〈0.01）,与患者的年龄、性别和肿瘤的大小无关.HIF-1α和HO-1间存在相关性（r=0.657,P〈0.05）.结论 HIF-1α和HO-1在胃癌发生发展中起重要作用,HIF-1α和HO-1的阳性表达可作为判断肿瘤具有高度侵袭转移潜能和预后不良的指标.     

HIF-1α和MMP-2在低分化胃癌中的表达及与浸润转移的关系

目的研究缺氧诱导因子-1α(HIF-1α)与基质金属蛋白酶-2(MMP-2)在低分化胃癌中的表达,并探讨两者在低分化胃癌浸润、转移过程中的相互关系及作用。方法采用SP免疫组化方法,检测54例低分化胃癌及20例正常胃组织石蜡标本中HIF-1α和MMP-2蛋白表达水平。结果低分化胃癌组织中HIF-1α和MMP-2蛋白表达阳性率明显高于正常胃组织(P0.05)。两者的表达与肿瘤的浸润深度、淋巴转移和TNM分期均有关(P0.05),HIF-1α与MMP-2的表达呈正相关(r=0.580,P0.05)。结论HIF-1α和MMP-2在低分化胃癌的侵袭、转移过程中存在一定的协同作用,两者可能成为判断胃癌预后的指标。     

能动性相关蛋白-1和缺氧诱导因子-1α在膀胱移行细胞癌中的表达及临床意义

目的探讨能动性相关蛋白-1(MRP-1/CD9)和缺氧诱导因子-1α(HIF-1α)在膀胱移行细胞癌中的表达及临床意义。方法采用免疫组化SP法观察46例膀胱癌石蜡标本中MRP-1/CD9和HIF-1α的表达情况,结合临床资料进行分析。结果膀胱癌组织中MRP-1/CD9和HIF-1α的阳性表达率分别为56.5%和43.5%。MRP-1/CD9阳性表达率在复发肿瘤中及随病理分级升高而下降(P<0.05),但与临床分期无关(P>0.05);HIF-1α的阳性表达率在复发肿瘤中及随病理分级、临床分期升高而升高(P<0.05)。MRP-1/CD9和HIF-1α的阳性表达率无显著相关性(P>0.05)。结论MRP-1/CD9和HIF-1α的表达可能是判断膀胱癌生物学行为的重要指标。     

缺氧诱导因子-1α在胃腺癌中的表达及其与肿瘤细胞增殖、凋亡的关系

目的 探讨缺氧诱导因子(HIF)-1α在胃腺癌中的表达及其对肿瘤细胞增殖、凋亡的影响和临床意义.方法 采用免疫组织化学SP法检测100例胃腺癌组织中HIF-1α、Cyclin D1和bcl-2的表达.结果 随着胃腺癌分化程度的降低、浸润深度的增加及发生淋巴结转移,HIF-1α、Cycfin D1阳性表达率也增加(X2值分别为4.99、7.20、11.65、5.36、4.55、4.58;P<0.05或P<0.01);随着浸润深度的增加及发生淋巴结转移,bcl-2的表达也明显升高(值分别为6.21、7.66;P<0.05或P<0.01).胃腺癌中Cyclin D1与bcl-2表达呈显著正相关(,值为5.96,P<0.05).HIF一1α阳性表达者中Cyclin D1、bel-2的阳性表达率均明显高于其阴性表达者,HIF-1α表达与CyclinD1、bcl-2的表达明显相关(X2值分别为5.94、6.14;P均<0.05).结论 三者的检测对判断胃腺癌的浸润转移能力及预后具有重要的临床意义;胃腺癌的浸润转移在一定程度上是肿瘤细胞不断增殖和凋亡抑制的结果 ;HIF-1α在一定程度上能够诱导肿瘤细胞的增殖、抑制其凋亡而促进胃腺癌的发生发展.     

缺氧诱导因子-1α和缺氧诱导因子-2α在人非小细胞肺癌表达的比较

目的 观察缺氧诱导因子(HIF)-1α和HIF-2α在人非小细胞肺癌(NSCLC)中的表达并探讨其临床意义.方法 采用实时定量聚合酶链反应(PCR)和Western blot法检测不同缺氧时程HIF-1α和HIF-2α的mRNA和蛋白表达,比较两者差异.进一步运用免疫组织化学技术检测两者在140例NSCLC患者标本中的表达,结合相关临床病理因素探讨其临床意义.结果 在缺氧条件下,HIF-1α蛋白在4h即迅速升至峰值,之后快速下降,而HIF-2α蛋白则表现为逐步上调并持续维持在较高表达水平.在140例NSCLC的标本研究中,HIF-2α与肿瘤大小、淋巴结转移和TNM分期关系密切(P<0.05),并且是预后的不良因素(P<0.05).结论 HIF-2α可能是肿瘤适应乏氧环境的主要调节因子,相较于HIF-1α、HIF-2α在NSCLC的靶向治疗研究中更具有价值.     

缺氧诱导因子HIF-1α与促凋亡蛋白BAK在胃癌中的表达及意义

目的探讨HIF-1α和BAK蛋白在胃癌中的表达情况,以及二者在胃癌中的相互关系及作用。方法应用免疫组化SABC染色法检测80例胃癌组织和20例正常胃组织中的HIF-1α和BAK蛋白的表达情况。结果胃癌中HIF-lα和BAK蛋白的表达阳性率分别为56.3%(45/80)和67.5%(54/80),而在胃正常组织中分别为5.0%(1/20)和20.0%(4/20),二者在胃癌中的表达显著高于胃正常组织,其差异有统计学意义(P<0.05)。HIF-1α蛋白表达与胃癌组织的浸润范围、分化程度及淋巴结转移有关(P<0.05),与临床分期、年龄及性别无关(P>0.05);BAK蛋白表达与胃癌浸润及分化程度相关(P<0.05),与淋巴结转移、临床分期、年龄及性别无关(P>0.05)。胃癌组织中HIF-1α与BAK蛋白的阳性表达之间呈正相关(列联系数r=0.056,P<0.05)。结论 HIF-1α与BAK蛋白在胃癌的临床分期及浸润转移中存在关系,这对于研究胃癌的发生和发展,以及对于探索以二者为靶点的抗肿瘤治疗有重要意义。     

缺氧诱导因子-1α及转录因子Snail与直肠癌侵袭转移及预后的关系

目的 探讨缺氧诱导因子(HIF) -1α与转录因子Snail在直肠癌中的表达及其侵袭转移的关系并评估预后.方法 采用免疫组织化学SABC法检测87例直肠癌组织中HIF-1 α与Snail的表达,分析两者在不同的临床病理分期与分化程度的直肠癌中的表达及其与预后的关系.结果 免疫组织化学检测结果显示直肠癌组织中HIF-1α、Snail的阳性表达率分别为58.6％ (51/87)、71.3％ (62/87),HIF-1α与Snail的表达与直肠癌的Dukes分期、远处转移及生存率有关(P＜0.05).HIF-1α与Snail的表达呈显著正相关(P＜0.05).结论 HIF-1 α、Snail蛋白的高表达可能是促进直肠癌侵袭转移的重要生物学标志.