Correlation between Expression of P38 MAPK-Signaling and uPA in Breast Cancer

OBJECTIVE To study the expression of phosphorylated p38 mitogen-activated protein kinase(p-p38)and uPA and the correlation of their expression with breast cancer clinicopathological characteristics,and to investigate the role of the p38MAPK-signaling pathway in regulating uPA expression in breast cancer cells. METHODS Immunohistochemistry(S-P) was used to test the expression of p-p38 and uPA in 60 specimens of breast cancer tissues.Western blots were adopted to detect expression of the p-p38 and uPA proteins in MDA-MB-231 and MCF-7 breast cancer cells,and uPA expression a er treatment with SB203580,a specific inhibitor of p38 MAPK. RESULTS The positive rate of the p-p38 protein and uPA protein expression in the breast cancer tissues was 56.7% and 60.0%,respectively.The expression of p-p38 was positively related to the expression of uPA(r=0.316,P<0.05).The expression of p-p38 and uPA was related to lymph node metastas is and the TNM stage(P<0.05),but it was not related to the patient’s age or tumor size(P>0.05).The expression of p-p38 and uPA in MDA-MB-231 cells was higher than that in MCF-7 cells.SB203580 inhibited the p38 MAPK pathway and reduced uPA protein expression. CONCLUSION The p38 MAPK-signaling pathway promotes breast cancer malignant progression by up-regulating uPA expression,and it may be an important process in breast cancer invasion and metastasis.     

Expression of the EphA2 Gene in Esophageal Carcinoma Tissues

OBJECTIVE To investigate the relationship of the EphA2 gene with the occurrence, invasion and metastasis of esophageal carcinoma. METHODS The expression of EphA2 mRNA was detected by RT-PCR and the EphA2 protein was estimated by immunohistochemistry (SP method) in both esophageal cancerous tissues and normal epithelial tissues. RESULTS The expression of EphA2 mRNA showed no difference between esophageal cancerous tissues and normal epithelium, and there appeared to be no correlation with differentiation of the cancerous tissues, the depth of infiltration or lymph node metastasis (P>0.05). However, the expression of the EphA2 protein was significantly higher in cancerous tissues compared to normal epithelial tissues (P<0.05). The expression of the EphA2 protein in a deeper invasive group and in a group with lymph node metastasis was significantly higher compared to a superficially invasive group and a group without lymph node metastasis (P<0.05). Its expression did not appear to be correlated with differentiation of cancerous tissues (P>0.05). CONCLUSION The occurrence of esophagus carcinoma and the formation of invasion and metastasis may be related to overexpression of the EphA2 protein but not to the level of mRNA, a finding which may due to up-regulation at the translation level or by increased protein stability.     

COX-2及P16在非霍奇金淋巴瘤中的表达及临床意义

Objective:To investigate the expression of cyclooxygenase-2(COX-2)and p16 proteins in non-Hodgkin's lym phomas(NHL)and their relationship with the genesis and progress of it.Methods:The expression of COX-2 and p16 protein were studied in the lymph nodes tissue from 60 NHL patients and 10 control patients with non-malignant diseases by flow cytometry.Results:Positive rate of COX-2 protein expression in NHL tissues(63.3%.38/60)was higher than that in normal lymphaden tissues(0,0/10).The difiefence was significant between the two groups(P＜0.01).Expression of COX-2 protein was related with the clinical stage of NHL.In stage Ⅰ+Ⅱ patients,it was significantly lower(35.0%+54.6%)than that in stage Ⅲ+Ⅳ patients(84.6%+87.5%)(P＜0.01).In different sex,age,tumor malignant degree,IPI grade,extranodal involvement and B symptoms groups,the differences of COX-2 expression were not statistically significant (P＞0.05).Positive fate of p16 protein expression(41.7%,25/60)in NHL' was statistically lower than that in normal lymphomas(100%,10/10)(P＜0.01). Expression of p16 protein was related to malignant degree of NHL.The positive rates of p16 protein in low malignant degree tissues(64.7%,11/17)was higher than that in high malignant degree tissues(14.3%,2/14)(P＜0.05).Positive rates of p16 protein of NHL tissues in different sex.age.IPI grade,extranodal involvement,dinical stages and B symptoms were not statistically significant(P＞0.05).The p16 protein expression in COX-2 positive patients was 47.4%(18/38),and in negative patients it was 31.8%(7/22).There was no statistically difference between them(P＞0.05).Correlation analysis revealed there was no correlation between expression of COX-2 and p16 protein.Conclusion:B0th COX-2 and P16 protein may all have relationship with the genesis and progress of NHL.The expression of COX-2 protein in NHL may be a poor prognostic indicator.COX-2 and p16 protein probably have dilferent mechanisms in the genesis and progress of NHL.Their relationship is firstly put forward in this article and needed further studying.     

Expressions of Livin and Smac proteins in non-small cell lung cancer

Objectlve:To investigate the expression characteristics of Livin and second mitochondrial activator of Caspase(Smac) proteins in non-small cell lung cancer(NSCLC),and analyze their effect on patients'prognosis.Methods:The expressions of Livin and Smac proteins were detected in 89 NSCLC tissue samples and 25 normal lung tissue samples by immunohistochemical technique.Results:The positive expression rates of Livin and Smac proteins in NSCLC tissues were 53.9%.and 58.4%respectively,higher than that in normal lung tissues(P＜0.01).Livin protein expression correlated with Smac protein significantly(χ2=18.451,P=0.000,r=0.455).The expression level of Livin protein was closely related to lymph node metastasis,TNM stage and histological type(P＜0.05),but not to sex,age,differentiation grade(P＞0.05).The expression level of Smac protein was closely related to lymph node metastasis,TNM stage(P＜0.01),but not to sex,age,histological types(P＞0.05).Kaplan-Meier analysis revealed a significant impact on survival by Livin protein in NSCLC (P＜0.01),but not by Smac protein(P＞0.05).Conclusion:Overexpression of Livin protein may play a promoting role in the occurrence and progression of NSCLC.Moreover,it may bring an adverse effect on patients'prognosis.Although overexpression of Smac protein affects the occurrence and progression of NSCLC,it has no relationship with the prognosis.Livin protein may be helpful to evaluate the progression of NSCLC,and to predict the prognosis.     

Expresston of the EphA2 Gene in Esophageal Carcinoma Tissues

OBJECTIVE To investigate the relationship of the EphA2 gene with the occurrence, invasion and metastasis of esophageal carcinoma. METHODS The expression of EphA2 mRNA was detected by RT-PCR and the EphA2 protein was estimated by immunohistochemistry （SP method） in both esophageal, cancerous tissues and normal epithelial tissues. RESULTS The expression of EphA2 mRNA showed no difference between esophageal cancerous tissues and normal epithelium, and there appeared to be no correlation with differentiation of the cancerous tissues, the depth of infiltration or lymph node metastasis （P〉0.05）. However, the expression of the EphA2 protein was significantly higher in cancerous tissues compared to normal epithelial tissues （P〈0.05）. The expression of the EphA2 protein in a deeper invasive group and in a group with lymph node metastasis was significantly higher compared to a superficial： ly invasive group and a group without lymph node metastasis （P〈0.05）. Its expression did not appear to be correlated with differentiation of cancerous tissues （P〉0.05）. CONCLUSION The occurrence of esophagus carcinoma and the formation of invasion and metastasis may be related to overexpression of the EphA2 protein but not to the level of mRNA, a finding which may due to up-regulation at the translation level or by increased protein stability.     

胃癌组织中Ets-1的表达及其与血管生成临床病理特征和预后的关系

Objective To investigate the expression of Ets-I in gastric carcinoma,pars-cancerous tissue and metastatic lymph nodes,and to determine the relationship between Ets-1 expression and clinicopathological features,angiogenesis and survival of patients with gastric carcinoma.Methods Gastric carcinoma tissue microarray was used to determine Ets-I protein expression by SP immunohistochemical staining in 189 advanced gastric cancer,54 papacancerous tissues,41 metastatic lymph nodes and 32 control tissues.Results The positive rates for Ets-1 expression of the carcinoma,paracancerous and control tissues were 71.4 %,29.6% and 18.8%,respectively,with a significant difference among the three groups(P ＜0.01).In the cancer tissues,the positive rate of Ets-1 protein expression was significantly associated with depth of invasion and lymph node metastasis(P ＜0.01),but not associated with degree of differentiation,Lauren's histological type,sex,age,and size of tumor(P ＞0.05).The positive rates for Ets-1 expression of the 41 gastric cancer and 41 metastatic lymph nodes were significantly different(P ＜0.05).In metastatic lymph nodes,the positive rate for Ets-1 expression was higher.The MVD in Ets-1 positive tumors was higher than that in the Ets-1 negative tumors,with a significant difference(P ＜ 0.05).Kaplan-Meier survival analysis showed that the survival time of Ets-1-negative patients was longer than that of Ets-1-positive patients (P ＜0.05).Cox regression analysis showed that Ets-1 expression was not an independent prognostic factor of gastric carcinoma.Conclusion A higher expression of Ets-1 is involved in carcinogenesis,development,invasion,and metastasis of gastric cancer.Ets-1 plays an important role in angiogenesis in gastric cancer.Ets-1 is a useful marker for predicting the outcome for patients with gastric carcinoma,though it is not an independent prognostic indicator.     

PCNP和β-catenin在涎腺腺样囊性癌中的表达及临床意义

目的 探讨PCNP和β-catenin在涎腺腺样囊性癌(SACC)组织中的表达及其与临床病理特征的关系.方法 收集2013年1月至2020年12月兰州大学第一医院30例接受手术切除的SACC患者的癌组织及10例癌旁组织标本.采用免疫组织化学SP法检测PCNP、β-catenin在SACC及癌旁组织中的表达情况,分析PC...     

涎腺腺样囊性癌中p53与P-gp、GST-π、TopoⅡ的表达及意义

目的:探讨抑癌基因p53与多药耐药基因P-gp、GST-π、TopoⅡ在涎腺腺样囊性癌的表达及意义。方法:应用免疫组织化学技术(SP法)检测p53、P-gp、GST-π和TopoⅡ在34例涎腺腺样囊性癌及12例正常涎腺组织中的表达。结果:p53、P-gp、GST-π和TopoⅡ在涎腺腺样囊性癌及正常涎腺组织中均有不同程度表达。涎腺腺样囊性癌组织中p53、P-gp、GST-π和TopoⅡ表达阳性率分别为58.8%(20/34)、85.3%(29/34)、88.2%(30/34)和17.6%(6/34)。复发组涎腺腺样囊性癌p53的阳性表达明显高于初发组(P<0.05)。p53的阳性表达与肿瘤的临床分期有关(P<0.05),并且与P-gp的阳性表达呈明显正相关(P<0.01)。GST-π的阳性表达与肿瘤的病理类型有关(P<0.05)。结论:p53、P-gp、GST-π和TopoⅡ可能参与涎腺腺样囊性癌的耐药过程。检测p53、P-gp、GST-π和TopoⅡ可为临床拟定化疗方案提供依据,也可作为判断涎腺腺样囊性癌预后的参考。     

Aberrant expression of beta-catenin, Pin1 and cylin D1 in salivary adenoid cystic carcinoma: relation to tumor proliferation and metastasis

The aims of this study were to investigate the expression levels of beta-catenin, Pin1 and cyclin D1 in salivary adenoid cystic carcinomas (SACC ) and to evaluate its clinical importance, furthermore, to elucidate whether beta-catenin expression was aberrant in SACC and whether Pin1 was involved in aberrant beta-catenin and cyclin D1 expression. The expression of Pin1, beta-catenin and cyclin D1 were examined in the specimens of 65 patients with SACC by immunohistochemistry, protein and mRNA expressions were detected by western blotting and RT-PCR in four SACC cell lines. Pin1 was overexpressed in 51 cases of SACC (78%), and high levels of Pin1 expression correlated with cyclin D1 positive expression (p = 0.02). Fourteen (22%) cases showed positive immunoreactivity for beta-catenin protein in the nuclear/cytoplasmic fraction in tumor tissues, which was defined as cytoplasm/nucleus staining, among which quite evident nuclear expression of beta-catenin was detected in six cases (9%), while cyclin D1 positive expression was detected in 41 cases of SACC (63%). Reduced membranous expression of beta-catenin was detected in the cases with metastasis (11/14). Theses results suggest that Pin1 and Wnt signalling pathway are activated in SACC and may play a pivotal role in SACC carcinogenesis and metastasis.     

Ezrin在涎腺腺样囊性癌组织中的表达

目的:探讨Ezrin在涎腺腺样囊性癌组织中的表达及意义。方法:用免疫组织化学SP法检测Ezrin在涎腺腺样囊性癌组织和正常涎腺组织中的表达,分析其在涎腺腺样囊性癌组织中的表达与肿瘤的侵袭性、复发、转移和预后的关系。结果:Ezrin在涎腺腺样囊性癌和正常涎腺组织中的阳性率表达分别为44.68%和9.09%,P<0.05;在癌细胞中主要为胞质内表达,染色深,而在正常涎腺组织则主要为细胞膜表达,染色浅或阴性。Ezrin的表达强度与有无神经受侵、有无发生局部复发及远处转移相关,P<0.05。Ezrin表达阳性组和阴性组的5年累积生存率分别为66.70%和100.00%,10年累及生存率分别为27.83%和95.00%,阳性组较阴性组预后差,P<0.05。结论:Ezrin的表达强度与涎腺腺样囊性癌的发生、侵袭性、复发和转移性有关,且Ezrin阳性表达预示患者预后不良。     

抑癌基因P16在涎腺腺样囊性癌中的表达意义

目的：探讨抑癌基因P16与涎腺腺样囊性癌的发生发展的关系。方法：采用免疫组织化学法检测30例腺样囊性癌中P16基因表达情况。结果：腺样囊性癌组织中阳性表达率为76．6％,P16蛋白阳性率在腺样囊性癌的腺样型,管状型,混合型,实体型中分别为90％,100％,42．9％,显示P16蛋白表达阳性率随恶性程度的上升而,降低,P16阳性与阴性之间的5年生存率则无明显差异。结论：抑癌基因P16的表达与肿瘤的病理类型有关,而腺样囊性癌预后好于其它肿瘤可能与P16缺失少有关。     

STAT3和p38MAPK在胃癌中的表达及临床意义

[目的]探讨STAT3和p38MAPK在胃癌中的表达及临床意义.[方法]采用免疫组化法检测80例胃癌组织及40例癌旁组织中STAT3和p38MAPK的表达.[结果]80例胃癌组织中STAT3的阳性表达率为72.5％,明显高于癌旁组织的17.5％ (P＜0.001); STAT3的表达与胃癌患者性别、年龄、浸润深度无关(P＜0.05),而与分化程度、淋巴结转移、TNM分期、远处转移有关(P＜0.001).80例胃癌组织中p38MAPK的阳性表达率为71.3％,明显高于癌旁组织的12.5％(P＜0.05);p38MAPK的表达与胃癌患者性别、年龄、淋巴结转移无关(P＞0.05),而与分化程度、浸润深度、TNM分期、远处转移有关(P＜0.001).胃癌中STAT3和p38MAPK的表达呈正相关(r=0.6986,P＜0.01).[结论]胃癌中STAT3和p38MAPK均过表达,可能与胃癌的发生发展有关.     

脑源性神经营养因子在涎腺腺样囊性癌中的表达及意义

[目的]探讨脑源性神经营养因子（BDNF）与涎腺腺样囊性癌（SACC）的关系。[方法]采用免疫组织化学方法检测45例SACC切片中BDNF的表达,并统计分析BDNF与SACC组织学分型、临床分期、神经侵犯和远处转移之间的关系。[结果]BDNF在SACC中的阳性表达率为84.4%（38/45）,BDNF表达强度与SACC的组织学分型和神经侵犯无明显关系（P〉0.05）,而与临床分期、远处转移关系密切（P〈0.05）。[结论]SACC中存在BDNF异常表达,而且BDNF可能促进了SACC的发生发展。     

E钙粘素在涎腺腺样囊性癌中的表达及其意义

背景与目的:近年来关于上皮型钙粘素与肿瘤关系的研究比较多,但不同研究得到的结果差异较大,而且近年来的研究显示,E钙粘素在肿瘤转移过程中的作用可能具有多面性.本文旨在研究E钙粘素在涎腺腺样囊性癌中的表达水平,探讨E钙粘素与涎腺腺样囊性癌的神经侵犯、局部复发、远处转移以及预后的关系.方法:采用免疫组化技术检测55例涎腺腺样囊性癌组织标本和20例正常涎腺组织中E钙粘素的表达.应用Kaplan-Meier法进行生存分析,组间比较用log-rank检验,两组比率的比较采用χ2检验.结果:本组患者的5年和10年生存率分别为78.2%和51.4%:E钙粘素在正常涎腺组织中的阳性率(90.0%)显著高于涎腺腺样囊性癌组织(63.6%)(P＜0.05);E钙粘素在有神经受侵、局部复发及远处转移者的肿瘤组织中的阳性率(50.0%、52.4%及47.8%),均低于无神经受侵、无局部复发及无远处转移者(71.4%、70.6%及75.0%).结论:E钙粘素在涎腺腺样囊性癌组织中表达下调;其表达水平与神经侵犯、局部复发及发生远处转移相关.