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1.
AIM: To investigate the expression and promoter methylation of tazarotene-induced gene-1 (TIG1) in esophageal squamous-cell carcinoma (ESCC) tissues. METHODS: The methods of methylation-specific PCR and real-time fluorescence quantitative PCR were applied to examine the methylation and mRNA expression of TIG1, respectively, in 43 cases of ESCC tissues, 20 cases of paracancerous tissues and 15 cases of normal tissues. RESULTS: The frequency of promoter methylation of TIG1 gene in ESCC tissues was 25.6% (11/43), which was significantly higher than that in the paracancerous tissues (5.0%, 1/20) and normal tissues (0/20). The hypermethylation of TIG1 gene in these tissues had no correlation with sex, age and clinical stage of the patients. However, it was correlated with the pathological stage (P<0.01) and lymph node metastasis (P<0.05). The mRNA expression of TIG1 in ESCC tissues was significantly lower than that in paracancerous tissues (P<0.05) and normal tissues (P<0.01). However, the expression level of TIG1 mRNA in methylated tissues was significantly lower than that in unmethylated tissues (P<0.01). CONCLUSION: Promoter methylation may be an important mechanism of TIG1 gene inactivation in ESCC, which was related to lymph node metastasis and TNM stage of esophageal carcinoma.  相似文献   

2.
AIM: To investigate the expression and significance of MAPK-interacting kinase-2 (Mnk2) and eukaryotic initiation factor 4E (eIF4E) in the patients with resected esophageal squamous cell carcinoma (ESCC).METHODS: The protein expression of Mnk2 and eIF4E in ESCC tissues (98 cases) and normal esophageal tissues (20 cases) were assessed by immunohistochemistry (IHC), and their correlations with clinicopathological features were statistically analyzed.RESULTS: The over-expression rate of Mnk2 and eIF4E was 68.4% (67/98) and 61.2% (60/98), respectively. The expression of Mnk2 had a positive correlation with eIF4E (P<0.05). Clinicopathologic analysis showed that Mnk2 expression was significantly correlated with T classification (P<0.05) and clinical stage (P<0.05).CONCLUSION: The over-expression of Mnk2 was significantly related to the tumor invasive depth, TNM stages and expression of eIF4E in ESCC. Expression of Mnk2 and eIF4E may have a cooperative formation mechanism in the development of ESCC.  相似文献   

3.
AIM: To investigate the expression of E-cadherin and forkhead box protein O3a (FOXO3a) in gastric cancer tissues and cells, and its correlation with cell viability. METHODS: The expression of E-cadherin and FOXO3a was detected by immunohistochemical staining in 53 specimens of gastric cancer tissues and their adjacent tissues, and the relationship between their expression and clinicopathological characteristics were analyzed. E-cadherin-over-expressing gastric cancer AGS cells were constructed by lentivirus-mediated cell transfection, and the protein expression of E-cadherin and FOXO3a was detected by immunocytochemistry method. The expression of E-cadherin, FOXO3a, Akt, Bcl-2 and Bax was determined by Western blot. The cell viability was detected by CCK-8 assay. RESULTS: The positive expression rates of E-cadherin and FOXO3a proteins in gastric cancer tissues were both significantly lower than those in their adjacent tissues (P<0.05). E-cadherin positive expression in gastric cancer tissues was significantly related to tumor grade and TNM stage (P<0.05), but not related to age, sex, location, T stage or lymph node metastasis. FOXO3a positive expression was significantly related to tumor grade (P<0.05), but not related to age, sex, location, TNM stage, T stage or lymph node metastasis. The expression of E-cadherin was positively correlated with FOXO3a expression in gastric cancer tissues (r=0.376, P=0.003). After over-expression of E-cadherin, the viability of gastric cancer AGS cells was significantly inhibited, the expression of FOXO3a, Bcl-2 and Bax was significantly increased, and the expression of Akt was significantly decreased. CONCLUSION: E-cadherin and FOXO3a are involved in the development of gastric cancer, and E-cadherin may affect the viability of gastric cancer cells by regulating Akt/FOXO3a signaling pathway.  相似文献   

4.
AIM: To investigate the protein expression of mitogen-activated protein kinase-interacting kinase-2 (Mnk2) and its prognostic effect in the patients with resected esophageal squamous cell carcinoma (ESCC). METHODS: A total of 86 informative patients with surgically resected ESCC and 54 normal esophageal tissues were enrolled. Western blot and immunohistochemistry (IHC) were utilized to assess the protein expression of Mnk2, and its correlation with prognosis was statistically analyzed by the methods of Kaplan-Meier curve and Cox proportional hazard mode. RESULTS: The protein expression of Mnk2 was elevated in most of tumor tissues compared with the adjacent tissues. Clinicopathologic analysis showed that Mnk2 expression was significantly correlated with the TNM stage (P<0.05). Both disease-free survival (DFS) and overall survival (OS) of Mnk2 over-expression patients were shorter than those in Mnk2 negative expression group. Multivariate analysis confirmed that Mnk2 expression, as an independent and significant factor for both DFS and OS, predicted a poor prognosis of the patients with resected ESCC (P<0.05). CONCLUSION: The expression of Mnk2 was significantly related to the TNM stages, and might be a novel predictor for prognosis in ESCC.  相似文献   

5.
AIM:This study was to investigate the expression and significance of Bmi-1 in colorectal carcinoma (CRC), and to explore the effect of Bmi-1 on Ki67 expression in human CRC.METHODS:The samples from sixty CRC, thirty adenomas and twenty normal colorectal mucosal tissues were used in this study.The expression of Bmi-1 protein was detected by immunohistochemistry.The clinicopathological features and survival rate of patients were also analyzed.RESULTS:The overexpression of Bmi-1 was respectively 25.0％, 6.7％and 0% in CRC and adenomas as well as normal colorectal mucosal tissues.The results showed that the expression of Bim-1 was significantly higher in CRC, compared with that in adenomas and normal colorectal mucosal tissues (P<0.05).The overexpression of Bmi-1 protein in CRC was obviously associated with distant metastasis and TNM stage (P<0.05), but not with gender, age, tumor size, tumor site, histological type, differentiation degree and lymph node metastasis (P>0.05).Kaplan-Meier survival analysis showed that the overexpression of Bmi-1 reduced significantly survival of CRC patients (P<0.05).No statistical relation between expression of Bmi-1 and Ki67 in CRC was observed.CONCLUSION:The overexpression of Bmi-1 protein is significantly correlated with tumorigenesis, metastasis and prognosis of CRC.Bmi-1 might be regarded as a parameter in evaluating prognosis of CRC.  相似文献   

6.
本书由中国农业科学院蔬菜花卉研究所主编,已于2002年9月出版发行。全书分上、下卷,1～6章为上卷,包括根菜类、白菜类、芥菜类、甘蓝类、绿叶菜类及葱蒜类,计2263个品种,1347页;7～12章为下卷,包括瓜类、茄果类、豆类、薯芋类、水生蔬菜类和多年生蔬菜类,计2550个品种,1177页。入志的品种中,地方品种占  相似文献   

7.
AIM: To investigate whether methylation of the TIMP-3 gene is associated with clinical-pathological characteristics, recurrence and metastasis of the colorectal cancer. METHODS: Nest methylation specific PCR (nMSP) and RT-PCR techniques were used to detect methylation of TIMP-3 gene and its mRNA expression in the colorectal cancer specimen and adjacent non-cancerous tissues. RESULTS: The expression of TIMP-3 mRNA in tumor tissues was distinctly reduced (P<0.01). The expression of TIMP-3 mRNA in those without lymph node metastasis was higher than those with lymph node metastasis (P<0.01). The patients with Duke's C, D and lymph node metastasis were more to contain methylated TIMP-3 compared to those with Duke's A, B and no lymph node metastasis (P<0.05). Statistical differences in pathological characteristics such as tumor site, Duke's stage, histological differentiation and type between TIMP-3 methylation positive group and negative group were observed (P<0.05). CONCLUSION: Methylation of the TIMP-3 gene promoter usually occurs in the proximal site, infiltrating type, poor cellular differentiation, lymph node metastasis and advanced stage of colorectal cancers patients.  相似文献   

8.
AIM: To investigate the expression and clinical significance of PAK4 in the cell lines and tissues of non-small cell lung cancer (NSCLC). METHODS: PAK4 expression in human bronchial epithelial (HBE) cells, NSCLC cell lines, NSCLC tissues and adjacent non-tumor tissues were assessed by immunohistochemistry, real-time PCR and Western blot. Prognostic value of PAK4 expression was evaluated by Kaplan-Meier analysis and Cox regression. RESULTS: PAK4 was over-expressed in the NSCLC cell lines at both mRNA and protein levels compared with HBE cells (P<0.05). PAK4 was over-expressed in the NSCLC tissues at both mRNA and protein levels compared with adjacent non-tumor tissues (P<0.05). PAK4 was over-expressed in the metastatic NSCLC tissues compared with the primary NSCLC tissues (P<0.05). Higher PAK4 staining scores were positively correlated with differentiation, lymph node metastasis, distant metastasis, and clinical stage. Kaplan-Meier analysis and log-rank test showed that overall survival was significantly different between the patients with up-regulated PAK4 and the patients with down-regulated PAK4(P<0.05). PAK4 over-expression was associated with NSCLC progression.CONCLUSION: Increased PAK4 expression was associated with tumor invasion, metastasis and prognosis in the patients with NSCLC. PAK4 is an important prognostic marker and potential therapeutic target in NSCLC.  相似文献   

9.
AIM: To investigate the clinical characteristics of microRNA (miR)-196b in colorectal cancer (CRC) and to study its biological function in 5-fluorouracil (5-FU) resistance. METHODS: miRNA sequence dataset and the corresponding clinical data of CRC patients were downloaded from The Cancer Genome Atlas (TCGA). Expression level and clinical characteristics of miR-196b in CRC patients were analyzed using SPSS 17.0. CRC cell line overexpres-sing miR-196b was established using transient transfection method. MTS test was used to evaluate the effect of miR-196b overexpression on 5-FU resistance. RESULTS: miR-196b expression was associated with lymph node metastasis and TNM stage (P<0.05), but not related with age and sex. Lymph node metastasis and distant metastasis were independent prognostic factors for rectal patients (P<0.05). The expression level of miR-196b was not associated with survival condition of rectal patients. The viability of the cells overexpressing miR-196b treated with different concentrations of 5-FU was significantly higher than that in control group (P<0.05). CONCLUSION: miR-196b may be a potential biomarker of TNM stage and lymph node metastasis in CRC. miR-196b increases the 5-FU resistance of CRC cells.  相似文献   

10.
AIM: To investigate the expression of the red cell membrane integration protein SLP-2 (stomatin-like protein 2) in gastric cancer tissues and to analyze its correlation with clinicopathological manifestations and prognosis. METHODS: One hundred and ninety gastric cancer tissue samples with detailed clinical information were collected from the Department of Pathology, Sun Yat-sen University Cancer Center. The protein expression of SLP-2 in ganstric cancer was detected by the method of immunohistochemistry. The relationships between SLP-2 expression and the clinicopathological manifestations were evaluated. RESULTS: The positive rate of SLP-2 in gastric cancer tissue was 63.2% (120/190). SLP-2 expression was relevant to infiltration depth, TNM stage and lymph node metastasis (P<0.05). However, no statistical difference was observed in the SLP-2 expression associated with sex, age, differentiation, tumor size and distant metastases. Kaplan-Meier survival curves revealed that increased expression of SLP-2 was associated with poor prognosis in gastric adenocarcinoma patients (P<0.01). Based on the univariate analysis, 7 factors were found to have statistical significance of associations with overall survival, including SLP-2 expression, lymph node metastasis, histological grade, tumor size, invasive depth, distant metastases and the 7th edition of the UICC TNM classification. Only the tumor size and the 7th edition of the UICC TNM classification were independent prognostic factors for overall survival in the multivariate analysis. CONCLUSION: SLP-2 is highly expressed in gastric adenocarcinoma tissues and may play an important role in tumor progression and metastasis. Although SLP-2 is not an independent prognostic factor, it may influence the prognosis of gastric cancer. Increased expression of SLP-2 can be used for predicting unfavorable prognosis in gastric adenocarcinoma patients.  相似文献   

11.
AIM: The aim of this study was to examine the microstatellite instability (MSI) and loss of heterozygosity(LOH) of locus D17S396 on chromosome 17 and their influence on the expression of nm23H1 in hepatocellular carcinoma (HCC),which may provide experimental evidence for the mechanism of nm23H1 gene and tumor metastasis.METHODS: Techniques such as DNA extraction from formalin-fixed paraffin-embedded tissues,PCR-SSCP,ordinary silver stain were used to study MSI and LOH of locus D17S396.Envision immunohistochemistry and Leica-Qwin computer imaging techniques were used to assess the expression of nm23H1.RESULTS: ① The frequency of heredity instability of HCCs was 35.42%.The frequency of LOH in the cases with lymph node or distant organs metastasis or not and with intrahepatic metastasis or embolus of portal vein or not was significantly different (P<0.01),it was higher in stage TNM Ⅲ than that in stageⅠ and Ⅱ.Moreover,it was higher in high tendency to invasion or metastasis cases than that in the low tendency cases (P<0.01).② The expression of nm23H1 was 56.25%.It was significantly different in Edmondson grade,TNM stage and in lymph node or distant organ metastasis cases (P<0.01).The cases with high tendency of invasion or metastasis exhibited lower nm23H1 expression compared with low tendency cases (P<0.01).③ The positive rate of nm23H1 protein in LOH positive group was lower than that in LOH negative group (P<0.05).CONCLUSION: The results indicate that both MSI and LOH of nm23H1 gene control the development of HCC independently in different pathways.LOH inhibits the expression of nm23H1,which endows it with high aggressive and poor prognosis.Increase in the amount of nm23H1 protein expression effectively restrains the tendency to invasion or metastasis of HCCs and improves prognosis of patients.  相似文献   

12.
AIM: To observe the expression of β-catenin in colonic adenocarcinoma and to investigate its clinical significance and prognostic value. METHODS: The integrated clinical and follow-up data of 52 patients, who were undergone radical operation, were retrospectively analyzed from June 2000 to June 2004 in our hospital. The paraffin-embedded tissues of 52 colonic adenocarcinoma specimens and 20 cases of normal paraneoplastic colonic mucous tissues were detected for β-catenin expression by immunohistochemical method. The relationships between β-catenin and clinical variables and prognostic value were statistically analyzed. RESULTS: β-catenin was normally expressed in all 20 normal cases. In the cases of colonic adenocarcinoma, the abnormal expression rate of β-catenin was 71%. The abnormal expression of β-catenin did not correlated with gender, age, histological differentiation and blood CEA (P>0.05), but it was correlated with lymph node metastasis and clinical stage (P<0.05). The abnormal expression of β-catenin were also correlated with the postoperative survive time (P<0.05). CONCLUSION: The abnormal expression of β-catenin is correlated with the lymph node metastasis and clinical stage, and the abnormal expression is an important adverse prognostic factor for survival in the patients with colonic adenocarcinoma. β-catenin may be a molecular prognostic marker in the patients with colonic adenocarcinoma.  相似文献   

13.
AIM:To observe the expression of calreticulin (CRT) in nasopharyngeal carcinoma tissues, analyze the significance of clinical pathology and the influence on epithelial-mesencymal transition (EMT) of CNE2 cells. METHODS:The expression of calreticulin was detected by immunohistochemistry in 52 nasopharyngeal carcinoma and 57 nasopharyngeal benign tissues, and the significance of clinical pathology was evaluated. The calreticulin gene-specific small interfering RNA was constructed, and then was transfected into the NPC cell line CNE2 using the cationic liposome method. The effect of CRT on the morphological changes of the CNE2 cells was observed under light microscope. The effect of CRT on the cell migration and invasion abilities of the CNE2 cells was detected by Transwell migration and invasion assays. The expression of EMT-related proteins E-cadherin, vimentin, transforming growth factor (TGF)-β and matrix metalloproteinase (MMP)-9 in the CNE2 cells was determined by Western blot. RESULTS:The positive expression rate of CRT in the benign lesion tissues was 19.29% (11/57), which was significantly increased in the nasopharyngeal carcinoma tissues as 82.69% (43/52). The expression rate of CRT was positively correlated with the stage of nasopharyngeal carcinoma and lymph node metastasis (P<0.05). Knockdown of CRT expression made the CNE2 cells showing a spindle shape to a flat, cobblestone-like epithelial state change, arranged more compact, and the migration and invasion abilities were significantly decreased (P<0.05). Knockdown of CRT expression resulted in significant increase in the protein expression of E-cadhe-rin, and the decreases in the protein expression of vimentin, TGF-β and MMP-9 in the CNE2 cells (P<0.05). CONCLUSION:Calreticulin expression in nasopharyngeal carcinoma is significantly higher and positively correlated with nasopharyngeal carcinoma stage and lymph node metastasis. Calreticulin promotes cell migration and invasion of nasopharyngeal carcinoma CNE2 cells by inducing EMT.  相似文献   

14.
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15.
AIM: To elucidate the correlation between the expression of aldehyde dehydrogenase 1 (ALDH1)/ATP-binding cassette subfaminly G member 2 (ABCG2) and microvessel density (MVD) in epithelial ovarian cancer (EOC).METHODS: In 198 specimens of EOC and 60 specimens of ovarian benign epithelial tumor tissues, the protein expression of ALDH1/ABCG2 and CD105 (microvessel marker) was detected by immunohistochemical staining.RESULTS: The positive rates of ALDH1 and ABCG2 in the EOC were 64.1% and 61.6%, respectively, while the positive rates in benign epithelial tumor tissues were 8.3% and 6.7%, respectively, and there were significant differences between them (P<0.05). In EOC and benign epithelial tumor tissues, the MVD were 22.6±9.7 and 5.03±3.35, respectively, and the difference was also significant (P<0.05). The expression of ALDH1 and ABCG2 in EOC was significantly related to differentiation, FIGO stage,and abdominal organ and lymph node metastasis (P<0.05). MVD had correlation with differentiation, FIGO stage, ascite, and abdominal organ and lymph node metastasis (P<0.05). MVD had positive correlation with the expression of ALDH1 and ABCG2 (P<0.01). There was also a positive correlation between the expression of ALDH1 and ABCG2 (P<0.01). Over-expression of ALDH1/ABCG2 and MVD≥23 were related to the poor prognosis. The survival rates in ALDH1/ABCG2 positive and MVD≥23 groups were significantly lower than those in ALDH1/ABCG2 negative and MVD<23 groups (P<0.05). The FIGO stage, the expression of ALDH1/ABCG2 and MVD were indepen-dent prognosis factors of EOC (P<0.05).CONCLUSION: The results suggest that the expression of ALDH1/ABCG2 and MVD in EOC are related to differentiation, lymph node metastasis, clinical stage and prognosis. Combined detection of these indexes may play an important role in predicting the progression and prognosis of EOC.  相似文献   

16.
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17.
AIM: To explore the protein levels of chemokine receptor 7 (CCR7) and vascular endothelial growth factor (VEGF)-C in breast carcinoma, and to investigate the effects of CCR7 and VEGF-C on prognosis of breast carcinoma. METHODS: The protein expression levels of CCR7 and VEGF-C in the breast carcinoma tissues and normal breast tissues were detected by the method of immunohistochemistry. At the same time, the relationship between clinicopathologic characteristics and the protein expression of CCR7 and VEGF-C in the breast carcinoma tissues was analyzed. The relationship between the protein expression of CCR7 and VEGF-C and survival time of the breast cancer patients was estimated by Kaplan-Meier method.RESULTS: The positive expression rates of CCR7 and VEGF-C in the breast carcinoma tissues were significantly higher than those in the normal breast tissues (P<0.01). A positive correlation was observed between the protein expression of CCR7 and the protein expression of VEGF-C in the breast carcinoma tissues (r=0.613, P<0.01). The protein expression of CCR7 and VEGF-C was correlated with lymph node metastasis and TNM stage (P<0.05), but both were not related to patients' age, primary tumor size, estrogen receptor and progesterone receptor. The survival time of the patients with CCR7 and VEGF-C positive expression was significantly shorter than that of the patients without the expression (P<0.05).CONCLUSION: The positive expression of CCR7 and VEGF-C proteins is associated with the prognosis of breast cancer, and combined detection of CCR7 and VEGF-C protein expression levels may be helpful to judge the prognosis of breast cancer.  相似文献   

18.
AIM: To study the expression and clinical significance of T-cell immunoglobulin and ITIM domain (TIGIT) in colorectal cancer. METHODS: The patients with colorectal cancer (n=80) from January 2016 to June 2018 were selected. The expression of TIGIT and CD155 in the colorectal cancer tissues and adjacent normal tissues were detected by immunohistochemical staining method. The expression of TIGIT and CD155 was also determined by Western blot and ELISA. RESULTS: The positive expression rates of TIGIT and CD155 were 78.8% (63/80) and 83.8% (67/80) in the colorectal cancer tissues, significantly higher than that in the paracancerous tissues of 8.8% (7/80) and 18.8% (15/80), respectively (P<0.05). There was a positive correlation between TIGIT and CD155 expression (r=0.867, P<0.01). The expression levels of TIGIT and CD155 were increased as the stage evolved. The positive rates of TIGIT and CD155 in the colorectal cancer tissues were correlated with the degree of differentiation, pathological stage and lymph node metastasis (P<0.05). CONCLUSION: TIGIT and CD155 are correlated with the occurrence and development of colorectal cancer, and can be used as one of the prognostic indicators of colorectal cancer.  相似文献   

19.
AIM: To investigate the ratio of apoptotic index and proliferative index (AI/PI) in gastric cancer and their association with survival. METHODS: The apoptotic population and the proliferative population were quantitatively analyzed by flow cytometry. The proliferative cells were identified by confocal microscope and Kaplan-Meier method was used to analyze survival. RESULTS: AI and PI were strongly correlated with a Pearson coefficient of 0.58 (P<0.01). A stepwise decrease trend in AI/PI was noted in clinical pathological variables, including lymph node metastasis and beyond metastasis (P<0.05 for each). No statistically significant difference in AI/PI expression based on different survival times was observed. Using the median AI/PI of 0.245, the cells were divided into two groups (greater than and less than the median AI/PI). Using Kaplan-Meier survival curves and the Log-rank test, no statistic difference was found in two groups. The high expression of Ki-67 in tumor was found by confocal microscope. CONCLUSION: AI and PI are significantly correlated. A stepwise decrease trend in AI/PI may exist in tumor progression. AI/PI may not be good as a prognostic factor for cancer evaluation.  相似文献   

20.
AIM: To investigate the relationship between the expression of MMP-2, TIMP-2 and VEGF-C in hepatocellular carcinoma (HCC) with or without lymph node metastasis. METHODS: The expression of MMP-2, TIMP-2 and VEGF-C in 44 cases of HCC were examined using immunohistochemistry methods (SP).RESULTS: The positive expression of MMP-2, TIMP-2 and VEGF-C was associated with lymph node metastasis of HCC (P<0.05). CONCLUSIONS: There was a significant correlation between the high-expression of MMP-2 and VEGF-C, and the low-expression of TIMP-2 in lymph node metastasis of HCC. VEGF-C is an important factor promoting lymph node metastasis of HCC. The expression of MMP-2, TIMP-2 and VEGF-C may have important value in determining lymph node metastasis and prognosis of HCC.  相似文献   

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