胰腺癌中磷酸酶和张力蛋白同源物基因及B7-H1蛋白的表达及其临床意义

Objective To investigate the probable correlation between the expressions of phosphatase and tensin homologue deleted on chromosometen (PTEN) and B7-H1 protein in pancreatic carcinoma and the biological behavior characteristics of tumors. Methods Forty-three patients were recruited who had undergone surgical resection for pancreatic carcinoma between 2002 and 2009. The PTEN and B7-H1 protein expressions in the tissue specimens of these 43 patients and 5 non-pancreatic carcinoma people' s pancreatic tissue specimens were evaluated by immunohistochemistry ELPS technique, and the clinical and pathological features of these specimens and the follow-up information were analyzed. Results PTEN expressions were significantly lower in pancreatic carcinoma tissues than in non-pancreatic carcinoma people' s pancreatic tissues but B7-H1 expressions were significantly higher ( P ＜ 0. 01 ). The expression of PTEN was negatively correlated to that of B7-H1 (r = -0.414 ,P ＜0. 01). PTEN and B7-H1 expressions correlated with the pathological grade and tumor-node-metastasis ( TNM ) stage, peripancreatic invasion, regional lymph node involvement,respectively (P＜0. 05). B7-H1 expressions also significantly correlated with the ages (P＜0. 01). Furthermore, PTEN and B7-H1 expressions showed significant prognostic effects (P＜0.01) and there are correlations existed between combined PTEN/B7-H1 expression and prognostic effects (P ＜0. 05). Conclusion The expression of PTEN and B7-H1 may be significantly correlated to the carcinogenesis,development and prognosis of pancreatic carcinoma.     

胰腺癌中磷酸酶和张力蛋白同源物基因及B7-H1蛋白的表达及其临床意义

Objective To investigate the probable correlation between the expressions of phosphatase and tensin homologue deleted on chromosometen (PTEN) and B7-H1 protein in pancreatic carcinoma and the biological behavior characteristics of tumors. Methods Forty-three patients were recruited who had undergone surgical resection for pancreatic carcinoma between 2002 and 2009. The PTEN and B7-H1 protein expressions in the tissue specimens of these 43 patients and 5 non-pancreatic carcinoma people' s pancreatic tissue specimens were evaluated by immunohistochemistry ELPS technique, and the clinical and pathological features of these specimens and the follow-up information were analyzed. Results PTEN expressions were significantly lower in pancreatic carcinoma tissues than in non-pancreatic carcinoma people' s pancreatic tissues but B7-H1 expressions were significantly higher ( P ＜ 0. 01 ). The expression of PTEN was negatively correlated to that of B7-H1 (r = -0.414 ,P ＜0. 01). PTEN and B7-H1 expressions correlated with the pathological grade and tumor-node-metastasis ( TNM ) stage, peripancreatic invasion, regional lymph node involvement,respectively (P＜0. 05). B7-H1 expressions also significantly correlated with the ages (P＜0. 01). Furthermore, PTEN and B7-H1 expressions showed significant prognostic effects (P＜0.01) and there are correlations existed between combined PTEN/B7-H1 expression and prognostic effects (P ＜0. 05). Conclusion The expression of PTEN and B7-H1 may be significantly correlated to the carcinogenesis,development and prognosis of pancreatic carcinoma.     

EphA2/EphrinAl及E-cadherin在胰腺癌中的表达及临床意义

目的 探讨EphA2、EphrinAl及E-cadherin在胰腺癌及癌旁非肿瘤组织中的表达及临床意义.方法.采用免疫组织化学EnVision二步法,检测48例胰腺癌及癌旁非肿瘤胰腺组织中EphA 2、EphrinAl和E-cadherin的表达,并分析其与临床病理因素的关系.应用log-rank检验和Cox比例风险模型分析EphA 2、EphrinAl和E-cadherin的表达与患者预后的关系.结果 EphA 2、EphrinAl和E-cadherin在胰腺癌组织和癌旁非肿瘤组织阳性表达差异均有统计学意义.Ⅲ～Ⅳ期胰腺癌EphA 2、EphrinAl强阳性染色及E-cadherin阴性染色分别为47.9%、47.9%和64.6%,显著高于Ⅰ～Ⅱ期的6.25%、8.3%和14.6%(P<0.05).E-cadherin表达阳性与阴性患者术后生存率比较差异有统计学意义(P<0.05).Cox多因素分析表明,JPS分期、EphA 2阳性表达及E-cadherin阴性表达是反映胰腺癌预后的独立指标.结论 EphA2/EphrinAl与E-cadherin蛋白表达异常可能共同参与了胰腺癌的发生、发展与转移;联合检测三种蛋白对于评价胰腺癌的预后有一定参考价值.

Abstract：

Objective To investigate the relationship between EphA2, EphrinAl and E-cadherin expressions and tumor stage and prognosis in pancreatic cancer. Method EphA2, EphrinAl and Ecadherin expressions were detected by immunohistochemistry in the tumor tissue and normal tissue specimens from 48 patients with primary pancreatic cancer. Results The expressions of EphA2 and EphrinAl were higher in the pancreatic carcinoma tissues than in the normal pancreatic tissues (P<0. 05). The E-cadherin expression was lower in the pancreatic cancer tissues than in the normal pancreatic tissues (P<0. 05). With decreasing histological differentiation, the expressions of EphA2 and EphrinAl in carcinoma tissues increased significantly (P<0. 05), while the E-cadherin expression decreased significantly (P<0. 05). The positive expressions of EphA2 and EphrinAl in the primary tumor significantly increased in stageⅢ and Ⅳ than in stage Ⅰ and Ⅱ (47. 9%vs 6. 25% , P<0. 05;47. 9% vs 8. 3%, P<0. 05), while the negative expression of E-cadherin was reversely correlated with these tumor stages (14. 6% vs 64. 6%, P<0. 05). Cox multivariate analysis showed that the clinical stage, EphA2 positive expression and E-cadherin negative expression were significantly associated with survival. Conclusion Abnormal expressions of EphA2, EphrinAl and E-cadherin were involved in the progression of pancreatic cancer and they were useful in predicting prognosis.     

HIF-1α、P-gp在胰腺癌中的表达及其临床病理学的意义

目的 检测HIF-1α、P-gp蛋白在胰腺癌组织中的表达,探讨它们的临床病理学意义及其相互之间的相关性.方法 应用免疫组织化学法检测74例胰腺癌组织,10例正常胰腺组织中HIF-1α、P-gp蛋白的表达.结果 HIF-1α、P-gp蛋白在胰腺癌组织中的阳性表达率分别为75.7%和86.5%,而正常胰腺组织中均呈阴性表达(P＜0.05).胰腺癌组织中HIF-1α和P-gp蛋白的表达呈显著正相关(r=0.304,P=0.009).胰腺癌组织中的HIF-1α蛋白表达与淋巴结转移、TNM分期呈正相关(P＜0.05);胰腺癌组织中的P-gp蛋白表达与淋巴结转移呈正相关,P-gp高表达与年龄大于60岁有关(P＜0.05).HIF-1α和P-gp蛋白高表达者的中位生存期明显短于低表达者(P＜0.05).结论 胰腺癌组织中HIF-1α、P-gp蛋白的表达上调,HIF-1α和P-gp呈正相关.胰腺癌组织中HIF-1α和P-gp蛋白的表达与淋巴结转移呈正相关.胰腺癌组织中HIF-1α和P-gp蛋白的高表达与预后差有关.

Abstract：

Objective To investigate the expression of HIF-1α and P-gp protein in pancreatic carcinoma and determine their clinicopathological significance and the correlation between the expression of HIF-1α, P-gp and the clinical prognosis. Method In samples from 74 cases of pancreatic carcinoma and 10 healthy individuals, the expression of HIF-1α and P-gp were detected by immunohistochemical method. Results The positive expression rate of HIF-1α and P-gp was 75.7% and 86.5%,respectively, which were remarkably higher than that in normal pancreatic tissue (P＜0.05). There was a positive correlation between the expression of HIF-1α and that of P-gp. The aberrant expression of HIF-1α and P-gp was associated with lymph node metastasis but not the location, size, clinical stages and nerve invasion of the tumor. Patients with high intensity of HIF-1α and P-gp expression showed a significantly lower median survival time than those with low intensity expression.Conclusions The expression of HIF-1α and P-gp is up-regulated in pancreatic carcinoma and there is a positive correlation between them. The expression of HIF-1α and P-gp might be related to the lymph node metastasis and poor prognosis.     

环氧合酶-2、第10号染色体同源缺失性磷酸酶-张力蛋白基因在肝胆管结石合并胆管癌组织中的表达及意义

目的 探讨环氧合酶-2(COX-2)、第10号染色体同源缺失性磷酸酶-张力蛋白基因(phosphatase and tensin homolog deleted on chromosome ten,PTEN)在肝胆管结石合并胆管癌(hepatobiliary calculus with cholangiocarcinoma,HCWC)中的表达及其意义,研究COX-2、PTEN与HCWC发生、发展的关系,为HCWC的临床防治提供依据.方法 研究分三组:正常胆管组(肝血管瘤或肝外伤切除标本)10例(A组),肝内结石所在胆管组30例(B组),HCWC组37例(C组).应用免疫组织化学SP法,通用二步法检测各组COX-2、PTEN的表达情况,并对检测结果进行分析.结果 COX-2在A、B、C三组中的表达阳性率分别为10.0%、33.3%和70.3%,癌组织中的表达阳性率明显高于对照组胆管组织(P＜0.01).PTEN在A、B和C三组中的表达阳性率分别为90.0%、80.0%和35.1%,癌组织中的表达阳性率明显低于对照组胆管组织(P＜0.01).在COX-2阳性表达的HCWC组织中,PTEN有较低表达.Kendall相关分析表明HCWC组织中COX-2与PTEN表达呈显著负相关(r=-0.323,P＜0.05).结论 COX-2高表达可能与HCWC形成有关.在HCWC中,COX-2和PTEN表达呈负相关.COX-2高表达、PTEN低表达可能提示HCWC更易发生淋巴转移或肝外转移.

Abstract：

Objective To explore the expressions of cyclooxygenase-2 (COX-2), phosphatase and tensin homolog deleted on chromosome ten (PTEN) in hepatobiliary calculus associated with cholangiocarcinoma (HCWC) and their clinical significance. The relationship between the expressions of COX-2, PTEN and the onset and progression of HCWC was investigated to form an experimental base for the prevention and treatment of HCWC. Methods Thirty seven patients with tumor tissues of HCWC (group C), thirty patients with tissues of bile duct surrounding intrahepatic calculus (group B), and ten patients with normal tissues of bile duct from operations of hemangiomas of liver or liver trauma as the control (group A) were sampled and collected. A two-step immunohistochemistry (SP method) was employed to detect and statistically analyze the expressions of COX-2 and PTEN in each of the 3 groups. Results In groups A, B, C, the positive rate of the expression of COX-2 was 10%,33.3%, and 70.3%, respectively. The positive rates of expression of COX-2 in the carcinoma tissues of HCWC was significantly higher compared with the control group (P＜0. 01). In groups A, B, C the positive rates of the expression of PTEN was 90. 0%, 80. 0%, and 35.0%, respectively. The positive rate of expression of PTEN in the carcinoma tissues of HCWC was significantly lower than the control group (P＜0. 01). The expression of COX-2 was followed by a low expression of PTEN in the tissues of HCWC. Kendall's related analysis showed a strong negative correlation between the expression of COX-2 and PTEN in HCWC (r=-0. 323, P＜0. 05). Conclusions A high expression of COX-2 was related to HCWC. There was a negative correlation between the expressions of COX-2 and PTEN in HCWC. A high expression of COX-2 and a low expression of PTEN suggested a high chance of HCWC in extrahepatic or lymphatic metastasis.     

RCAS1在胰腺癌诊断中的作用

Objective To evaluate the effect of receptor-binding cancer antigen expressed on SiSO cells(RCASI) as serum tumor marker on the diagnosis of pancreatic cancer. Methods Receiver-operating characteristics(ROC) curve methods were used to assay the serum content of RCAS1 ,CA19-9 and CA242 in 46 patients with pancreatic cancer, 18 patients and 20 normal tissues of chronic pancreatitis detected by enzymelinkod immunosorbent assay (ELISA), and the results were analyzed by statistics methods. The expressions of RCAS1 protein were analyzed by immunohistochemical method in 32 patients with pancreatic cancer, 10 patients with chronic pancreatitis and 6 cases of normal pancreatic specimens. Results The serum levels of RCAS1 ,CA19-9 and CA242 in pancreatic cancer were higher than that in chronic pancreatitis respectively (P ＜ 0.01). The area under curve of RCAS1, CA19-9 and CA242 were 0.826, 0.804 and 0.737 ,respectively. Subgroup analysis indicated that the RCAS1 and CA19-9 levels of pancreatic cancer patients without obstructive jaundice were lower than those for patients with obstructive jaundice (P＜0.01). CA19-9 levels of patients with resectable pancreatic cancer were lower than those with unresectable pancreatic cancer(P ＜ 0.01). Immunohistochemistry showed that the expression rates of RCAS1 in pancreatic cancer and chronic pancreatitis were 87.5% and 40.0% ,respectively (P ＜0. 05). Conclusions In diagnosis of pancreatic cancer,the clinical value of RCAS1 is available. And the combination test of RCAS1 and CA19-9 have clinical value to evaluate if the pancreatic cancer can be resected before operation.     

RCAS1在胰腺癌诊断中的作用

Objective To evaluate the effect of receptor-binding cancer antigen expressed on SiSO cells(RCASI) as serum tumor marker on the diagnosis of pancreatic cancer. Methods Receiver-operating characteristics(ROC) curve methods were used to assay the serum content of RCAS1 ,CA19-9 and CA242 in 46 patients with pancreatic cancer, 18 patients and 20 normal tissues of chronic pancreatitis detected by enzymelinkod immunosorbent assay (ELISA), and the results were analyzed by statistics methods. The expressions of RCAS1 protein were analyzed by immunohistochemical method in 32 patients with pancreatic cancer, 10 patients with chronic pancreatitis and 6 cases of normal pancreatic specimens. Results The serum levels of RCAS1 ,CA19-9 and CA242 in pancreatic cancer were higher than that in chronic pancreatitis respectively (P ＜ 0.01). The area under curve of RCAS1, CA19-9 and CA242 were 0.826, 0.804 and 0.737 ,respectively. Subgroup analysis indicated that the RCAS1 and CA19-9 levels of pancreatic cancer patients without obstructive jaundice were lower than those for patients with obstructive jaundice (P＜0.01). CA19-9 levels of patients with resectable pancreatic cancer were lower than those with unresectable pancreatic cancer(P ＜ 0.01). Immunohistochemistry showed that the expression rates of RCAS1 in pancreatic cancer and chronic pancreatitis were 87.5% and 40.0% ,respectively (P ＜0. 05). Conclusions In diagnosis of pancreatic cancer,the clinical value of RCAS1 is available. And the combination test of RCAS1 and CA19-9 have clinical value to evaluate if the pancreatic cancer can be resected before operation.     

RCAS1在胰腺癌诊断中的作用

Objective To evaluate the effect of receptor-binding cancer antigen expressed on SiSO cells(RCASI) as serum tumor marker on the diagnosis of pancreatic cancer. Methods Receiver-operating characteristics(ROC) curve methods were used to assay the serum content of RCAS1 ,CA19-9 and CA242 in 46 patients with pancreatic cancer, 18 patients and 20 normal tissues of chronic pancreatitis detected by enzymelinkod immunosorbent assay (ELISA), and the results were analyzed by statistics methods. The expressions of RCAS1 protein were analyzed by immunohistochemical method in 32 patients with pancreatic cancer, 10 patients with chronic pancreatitis and 6 cases of normal pancreatic specimens. Results The serum levels of RCAS1 ,CA19-9 and CA242 in pancreatic cancer were higher than that in chronic pancreatitis respectively (P ＜ 0.01). The area under curve of RCAS1, CA19-9 and CA242 were 0.826, 0.804 and 0.737 ,respectively. Subgroup analysis indicated that the RCAS1 and CA19-9 levels of pancreatic cancer patients without obstructive jaundice were lower than those for patients with obstructive jaundice (P＜0.01). CA19-9 levels of patients with resectable pancreatic cancer were lower than those with unresectable pancreatic cancer(P ＜ 0.01). Immunohistochemistry showed that the expression rates of RCAS1 in pancreatic cancer and chronic pancreatitis were 87.5% and 40.0% ,respectively (P ＜0. 05). Conclusions In diagnosis of pancreatic cancer,the clinical value of RCAS1 is available. And the combination test of RCAS1 and CA19-9 have clinical value to evaluate if the pancreatic cancer can be resected before operation.     

RCAS1在胰腺癌诊断中的作用

Objective To evaluate the effect of receptor-binding cancer antigen expressed on SiSO cells(RCASI) as serum tumor marker on the diagnosis of pancreatic cancer. Methods Receiver-operating characteristics(ROC) curve methods were used to assay the serum content of RCAS1 ,CA19-9 and CA242 in 46 patients with pancreatic cancer, 18 patients and 20 normal tissues of chronic pancreatitis detected by enzymelinkod immunosorbent assay (ELISA), and the results were analyzed by statistics methods. The expressions of RCAS1 protein were analyzed by immunohistochemical method in 32 patients with pancreatic cancer, 10 patients with chronic pancreatitis and 6 cases of normal pancreatic specimens. Results The serum levels of RCAS1 ,CA19-9 and CA242 in pancreatic cancer were higher than that in chronic pancreatitis respectively (P ＜ 0.01). The area under curve of RCAS1, CA19-9 and CA242 were 0.826, 0.804 and 0.737 ,respectively. Subgroup analysis indicated that the RCAS1 and CA19-9 levels of pancreatic cancer patients without obstructive jaundice were lower than those for patients with obstructive jaundice (P＜0.01). CA19-9 levels of patients with resectable pancreatic cancer were lower than those with unresectable pancreatic cancer(P ＜ 0.01). Immunohistochemistry showed that the expression rates of RCAS1 in pancreatic cancer and chronic pancreatitis were 87.5% and 40.0% ,respectively (P ＜0. 05). Conclusions In diagnosis of pancreatic cancer,the clinical value of RCAS1 is available. And the combination test of RCAS1 and CA19-9 have clinical value to evaluate if the pancreatic cancer can be resected before operation.     

RCAS1在胰腺癌诊断中的作用

Objective To evaluate the effect of receptor-binding cancer antigen expressed on SiSO cells(RCASI) as serum tumor marker on the diagnosis of pancreatic cancer. Methods Receiver-operating characteristics(ROC) curve methods were used to assay the serum content of RCAS1 ,CA19-9 and CA242 in 46 patients with pancreatic cancer, 18 patients and 20 normal tissues of chronic pancreatitis detected by enzymelinkod immunosorbent assay (ELISA), and the results were analyzed by statistics methods. The expressions of RCAS1 protein were analyzed by immunohistochemical method in 32 patients with pancreatic cancer, 10 patients with chronic pancreatitis and 6 cases of normal pancreatic specimens. Results The serum levels of RCAS1 ,CA19-9 and CA242 in pancreatic cancer were higher than that in chronic pancreatitis respectively (P ＜ 0.01). The area under curve of RCAS1, CA19-9 and CA242 were 0.826, 0.804 and 0.737 ,respectively. Subgroup analysis indicated that the RCAS1 and CA19-9 levels of pancreatic cancer patients without obstructive jaundice were lower than those for patients with obstructive jaundice (P＜0.01). CA19-9 levels of patients with resectable pancreatic cancer were lower than those with unresectable pancreatic cancer(P ＜ 0.01). Immunohistochemistry showed that the expression rates of RCAS1 in pancreatic cancer and chronic pancreatitis were 87.5% and 40.0% ,respectively (P ＜0. 05). Conclusions In diagnosis of pancreatic cancer,the clinical value of RCAS1 is available. And the combination test of RCAS1 and CA19-9 have clinical value to evaluate if the pancreatic cancer can be resected before operation.     

B7-H1在胰腺癌免疫逃避中的作用研究

目的 检测B7-H1和IL-10在胰腺癌组织中的表达情况,并分析两者表达水平的相关性,以探讨肿瘤局部IL-10的异常增高和B7-H1表达的关系.方法 应用RT-PCR、Western blot和免疫组织化学法检测35例胰腺癌组织、相应癌旁组织和5例正常胰腺组织中B7-H1及IL-10的表达情况,并分析其相关性.结果 在胰腺癌、癌旁和正常胰腺组织中,B7-H1和IL-10在mRNA及蛋白水平的表达呈现出明显由高至低的趋势,且两两之间比较均具有明显差异(P<0.05),免疫组织化学结果也同样证实了胰腺癌中高表达B7-H1和IL-10,阳性率分别为60.5%±12.7%和65.3%±16.2%,而正常组织中未检测到表达.同时,相关性分析中显示肿瘤组织B7-H1高表达与IL-10水平呈明显正相关,分别表现在mRNA表达水平(P=0.008,r=0.841)和蛋白表达水平(P=0.007,r=0.838).结论 胰腺癌细胞上调表达B7-H1可能是肿瘤局部高浓度IL-10形成的原因之一,由此导致的抗肿瘤免疫能力降低可使肿瘤细胞逃避免疫系统的杀伤作用.     

Nectin-4在胰腺癌中的表达及其临床意义

目的 检测胰腺癌与正常胰腺组织中nectin-4蛋白的表达水平,探讨nectin-4蛋白的表达情况与胰腺癌临床病理特征之间的关系及临床意义.方法 采用免疫组织化学方法检测40例胰腺癌组织及12例正常胰腺组织中nectin-4蛋白的表达情况,并分析其与胰腺癌临床病理参数之间的关系.结果 (1)各组中nectin-4蛋白的表达水平:胰腺癌组,累积吸光度值2.43±0.75,阳性区域面积值9.73±1.86;正常胰腺组,累积吸光度值1.06±0.68,阳性区域面积值4.76±1.70.胰腺癌组织中nectin-4蛋白的阳性表达量高于后者,差异有统计学意义(P＜0.01);(2)nectin-4蛋白与胰腺癌临床病理参数的关系:在不同性别、不同年龄间比较,差异均无统计学意义(P＞0.05);与组织病理分化程度(P＜0.01)、有无淋巴结转移(P＜0.05)均明显相关.结论 胰腺癌组织中nectin-4蛋白呈高表达状态,其过量表达与胰腺癌的恶性程度密切相关.     

nm23-H1基因和增殖细胞核抗原在肝癌组织中的表达及其与癌细胞DNA含量的关系

目的　探讨转移抑制基因nm23-H1在肝癌组织中的表达和癌细胞增殖及DNA含量间的关系。方法　应用免疫组织化学染色法检测56例肝癌组织标本中nm23-H1基因和增殖细胞核抗原(PCNA)的表达,应用图像分析系统测定癌细胞DNA含量,分析与肝癌病理生物学行为之间的关系。结果　nm23-H1表达阳性率无包膜组肝癌(29.6%)比包膜完整(64.3%)和包膜突破组肝癌(66.7%)明显减低(P＜0.05)。DNA指数(DI)与肝癌包膜情况、组织类型、组织分级也有显著相关性(P＜0.05)。nm23-H1表达阴性的肝癌PCNA标记指数（LI）高于nm23-H1阳性者（P＜0.05);PCNA标记指数高增殖组肝癌DI值（2.30±0.90）较低增殖组肝癌DI值（1.86±0.7）明显增高（P＜0.05）。结论　nm23-H1表达与肝癌包膜形成具有一定关系,并与肝癌增殖活性相关。DNA含量测定结合PCNA免疫组织化学染色可较为准确的反映肝癌浸润侵袭特征和增殖活性。     

B7-H1和CA9在膀胱尿路上皮癌中表达的临床意义

目的 分析B7-H1和CA9在膀胱尿路上皮癌中的表达及二者之间的相互关系,探讨B7-H1和CA9在膀胱尿路上皮癌的发生、发展中的作用.方法 采用免疫组织化学方法检测43例膀胱尿路上皮癌及7例正常膀胱组织中B7-H1 和CA9 的表达,并评价它们与病理分级、临床分期、复发以及两者之间的关系.结果 43例膀胱尿路上皮癌组织B7-H1和 CA9阳性表达率分别为65.11%、67.44%.正常组织中不表达.两者的表达与病理分级、临床分期及复发相关(P<0.05).在膀胱尿路上皮癌组织中B7-H1的表达水平与CA9 的表达水平有关联(P<0.05).结论 B7-H1和CA9在膀胱尿路上皮癌的发生、发展过程中起着重要的作用,这为膀胱癌的早期诊断和治疗提供了新的途径.     

B7-H1在直肠癌与镶嵌血管中的表达及意义

目的 探讨共刺激配体B7-H1在直肠癌和镶嵌血管中的表达及临床意义.方法 应用免疫组织化学方法 观察50例直肠癌患者癌组织和镶嵌血管中的B7-H1表达,探讨B7-H1表达和直肠癌的病理学特征及预后间的关系.结果 随访期13例患者死亡,37例存活患者的中位随访期为3.4年(0～5年);64%的标本显示蛋B7-H1阳性染色,中位染色评分为2.5(0～4);B7-H1阳性表达与临床和病理特征呈逆相关(P＜0.05).15例(30%)的肿瘤患者同时B7-H1和镶嵌血管表达阴性,3例(6%)B7-H1阴性而镶嵌血管阳性,13(26%)B7-H1阳性而镶嵌血管阴性,19例(38%)B7-H1和镶嵌血管同时阳性表达.B7-H1阳性的肿瘤患者较N7-H1阴性的患者更可能镶嵌血管表达阳性(59.3%比11.1%;P＜0.01).双阳性组的生存率明显低于阴性或单阳性组(P＜0.01).21例表达镶嵌血管的直肠癌标本中有8例显示镶嵌血管内的内皮细胞或肿瘤细胞存在B7-H1的表达.结论 在直肠癌及镶嵌血管中阳性表达的B7-H1可作为直肠癌患者的预后标志.B7-H1参与直肠癌及镶嵌血管的免疫逃逸.     

大鼠胰腺癌和非癌胰腺组织中EZH 2和PTEN的表达及其意义

目的探讨大鼠胰腺癌和非癌胰腺组织中EZH2和PTEN的表达水平及其在胰腺癌发生中所起的作用。方法将二甲基苯荓蒽(DMBA)直接置入胰腺实质内制备胰腺癌模型(A,B组),B组成模1周后每周腹腔注射曲古霉素A(TSA)1μg,A,B组3~5个月内处死,对照组(C组)于第5个月处死;肉眼检查和镜下观察胰腺癌发生情况。EnVisionTM免疫组化法检测3组EZH2和PTEN的表达。结果(1)A组3~5个月癌发生率为48.7%(18/37),17例为胰腺导管腺癌,1例为纤维肉瘤;B组3~5个月癌发生率为33.3%(12/36),11例为胰腺导管腺癌,1例为纤维肉瘤;A组胰腺癌最大径均值大于B组(P0.05);C组胰腺和A,B,2组胰腺外主要脏器均未见明显病理改变。(2)A,B组胰腺导管腺癌EZH2表达阳性率明显高于相应非癌胰腺组织(P0.01);A组+B组胰腺导管癌PTEN表达阳性率明显低于A组+B组非癌胰腺组织(P0.05),但A组和B组胰腺导管癌PTEN表达阳性率与A组或B组非癌胰腺组织间差异无统计学意义(P0.05);EZH2阳性表达和/或PTEN阴性表达的非癌胰腺组织导管上皮均呈轻至重度不典型增生;胰腺导管癌中EZH2与PTEN表达呈明显不一致性(P=0.045);C组正常胰腺EZH2表达均阴性而PTEN表达均阳性。2例纤维肉瘤EZH2和PTEN表达均阴性。结论较大剂量DMBA置入胰实质内可获得较高胰腺癌发生率,TSA能抑制胰腺癌的发生和生长;EZH2基因的激活及PTEN基因的失活在大鼠胰腺癌发生中可能起关键作用。     

神经生长因子、趋化因子受体在神经流通浸润型胰腺癌组织中的表达及其临床意义

目的 观察神经生长因子(NGF)和趋化因子受体(CXCR4)在胰腺癌组织中的表达及其对胰腺癌神经浸润的影响.方法 采用S-100免疫组织化学染色和电镜观察45例胰腺癌组织和28例正常胰腺组织中神经浸润情况,应用免疫组织化学SP法和GMIAS2.0图像分析系统测定NGF、CXCR4蛋白在各组中表达的平均灰度值,利用逆转录-聚合酶链反应(RT-PCR)分析NGFmRNA、CXCR4 mRNA在各组中表达水平.结果 胰腺癌神经浸润的发生率达到80%,NGF蛋白在神经浸润型、无神经浸润型胰腺癌组织中表达的平均灰度值分别为(203.6800±20.7749)、(129.2200±15.9874),两者差异有统计学意义(P＜0.05).CXCR4蛋白在神经浸润型胰腺癌组织、无神经浸润型胰腺癌组织中表达的平均灰度值分别为(182.3800±18.3524)、(123.3600±15.2737),两者差异有统计学意义(P＜0.05).胰腺癌神经浸润型NGF mRNA表达水平为(0.7719±0.0634),明显高于胰腺癌无神经浸润型(0.2922±0.0288)和正常胰腺组织(0.2123±0.0231,P＜0.01);胰腺癌神经浸润型CXCR4 mRNA表达水平为(0.6892±0.0573),明显高于胰腺癌无神经浸润型(0.2877±0.0255)和正常胰腺组织(0.2076±0.0204),差异均有统计学意义(P＜0.01).结论 NGF、CXCR4在胰腺癌神经浸润过程中发挥重要作用,其机制可能与促进肿瘤细胞侵袭和生长,诱导肿瘤细胞向神经组织作定向运动有关.     

整合素β3与Fas蛋白在胃癌组织中的表达及其意义

目的 探讨整合素β3(Integin-β3)和Fas蛋白在胃癌组织中的表达、相互关系及意义.方法 应用免疫组织化学方法 检测48例胃癌组织及12例正常胃黏膜中Integrin-β3和Fas蛋白的表达.结果 胃癌组织中Integrin-β3阳性率显著高于正常胃黏膜(72.9%比25.0%,P＜0.01);正常胃黏膜中Fas蛋白阳性率显著高于胃癌组织(83.3%比33.3%,P＜0.01);Integin-β3阳性率与淋巴结转移、TNM分期显著相关(P＜0.01),而与肿瘤细胞分化程度无相关性(P＞0.05);Fas蛋白阳性率与淋巴结转移、TNM分期及肿瘤细胞分化程度均无相关性(P均＞0.05).胃癌组织中Integrin-β3与Fas表达具有显著等级负相关(r=-0.429,P＜0.01).结论 htegrin-β3的表达与胃癌细胞的浸润与转移密切相关.     

自噬相关基因 LC3、Beclin-1与凋亡相关基因BCL-2在膀胱尿路上皮癌中的表达

目的 检测自噬相关基因LC3、Beclin-1与凋亡相关基因BCL-2在膀胱尿路上皮癌和膀胱正常组织中的表达情况,探讨其与膀胱尿路上皮癌发生、发展的相关性。 方法 应用免疫组化SP法检测10例正常膀胱组织及56例膀胱尿路上皮癌组织中LC3、Beclin-1及BCL-2 蛋白的表达水平,并结合临床病理因素进行分析。结果 LC3在膀胱癌的阳性表达率高于正常膀胱组织( P＜0. 05),且与膀胱尿路上皮癌的组织学分化程度及肿瘤分期相关( P ＜0. 05)。Beclin-1在膀胱尿路上皮癌组织中的表达高于正常膀胱组织( P ＜0. 05),且与膀胱尿路上皮癌的组织学分化程度相关（P＜0.01）。BCL-2在膀胱癌组织中的表达显著高于正常膀胱组织( P＜0. 01),且与膀胱尿路上皮癌淋巴结转移相关( P＜0. 05)。经Spearman秩相关检验,LC3蛋白、Beclin-1蛋白的表达均与BCL-2蛋白的表达呈正相关,相关系数分别为0.3436（P＜0. 05)和0.3593（P＜0. 01)。结论 在膀胱尿路上皮癌中,自噬活性的上调与凋亡能力的下调并存,自噬相关基因LC3、Beclin-1与凋亡相关基因BCL-2在膀胱尿路上皮癌的发生、发展中起协调作用,对其联合检测有助于判断膀胱尿路上皮癌的进展程度及患者的预后情况。