For an advanced elucidation of mechanisms of nm23-H1 suppressive effects on metastasis of primary hepatocellular carcinoma (HCC), it is necessary to investigate the correlation between nm23-H1 expression and relative factors involved in the HCC invasion. In present report, full-length cDNA of nm23-H1 was subcloned into pBKCMV vector and transfected into HCC cell line to observe its effects on invasion, cytosolic free Ca2+ and Nras mRNA expression. The results showed that lower expression of N-ras and higher cytosolic free Ca2+ in transfected cell line were detected, while the potential of invasion was depressed. It suggests that the suppressive effects on HCC metastasis might interact with intracellular signal transduction which is essential for stimulating cell invasion.
ObjectiveTo explore the expression of MSI2 in gastric cancer and its association with clinical significance. MethodsThe expression level of MSI2 mRNA in gastric cancer tissues and para-carcinoma tissues was detected by Real-time PCR to explore its clinical significance. The expression level of MSI2 protein was detected by Western blotting. The prognosis of patients with the ratio of MSI2 mRNA expression level in gastric cancer tissues and adjacent normal tissues was more than 2 times and below 2 times were compared. ResultsThere was no significant difference between the expressions of MSI2 mRNA in cancer tissues and para-carcinoma tissues(P > 0.05). The expression level of MSI2 mRNA were associated with the invasion depth (P=0.017), TNM stage (P=0.028), differentiation (P=0.020), and size (P=0.030) of tumor, but no association with other clinical factors such as gender, age, and location were found. The overall survival of the patients with high expression of MSI2 mRNA was significantly shorter than that of the patients with low expression of MSI2 mRNA (χ2=4.221, P=0.040). ConclusionMSI2 expression is associated with the gastric cancer invasion, TNM stage and differentiation, and the patients with higher expression of MSI2 mRNA have poor prognosis, which makes it possible to be a potential therapeutic target.
Objective To summarize the role of matrix metalloproteinases (MMPs) in occurrence and development of gastric cancer. Methods Domestic and international publications online involving MMPs of gastric cancer in recent years were collected and reviewed. Results The occurrence and development of gastric cancer was a multi-step and multi-factorial complicated progress, whose etiology and pathogenesis were still unclarified. MMPs were a class of proteolytic enzymes, which played an important role in the proliferation, metastasis, angiogenesis of gastric cancer and apoptosis of tumor cells and their surrounding normal cells by regulating the microenvironment of the growth of tumor. Conclusion MMPs promote the evolution of gastric cancer in variable ways, the mechanisms of which should be comprehended to provide a theoretical basis for the future treatment of gastric cancer.
【Abstract】Objective To investigate the correlation of adhesive molecule expressions with potential of invasion and metastasis in papillary thyroid carcinoma (PTC). Methods S-P immunohistochemical method was used to detect CD44v6 and E-cadherin expression in 58 cases of PTC. Results The positive rates of CD44v6 and E-cadherin in PTC were 72.40%and 41.4% respectively. There was a positive correlation between CD44v6 expression and tumor invasive and metastatic potential in PTC (P＜0.05), and a reverse correlation between E-cadherin expression and the potential (P＜0.01).Moreover,there was a reverse correlation between the CD44v6 and E-cadherin expression in PTC(P＜0.05). Conclusion These data show a correlation between the adhesive molecule expression and the potential of invasion and metastasis in PTC. CD44v6 and E-cadherin may be prognostic indicators in PTC.
【Abstract】Objective To study the effects of exogenous hyaluronidase on invasive and angiogenic potential of human breast cancer cell line ZR-75-30.MethodsThere were two groups in the study: the study group (hyaluronidase group) and the control group. The invasive potential and the angiogenic potential of human breast cancer cell ZR-75-30 were detected by the invasive model in vitro and technique of double-chamber co-culture that human breast cancer cell line ZR-75-30 and human umbilicus vein endothelium cell ECV-304 were co-cultured. ResultsThe penetrating number of tumor cell in the study group (70.625±11.64) was significantly higher than that in the control group (22.125±6.09),P＜0.01. The tube number from ECV-304 cell induced by ZR-75-30 cell in the study group (34.5±2.4) was significantly higher than that in the control group (8.5±1.5)， P＜0.01. ConclusionExogenous hyaluronidase can reinforth the invasive and angiogenic ability of breast cancer cells.
【 Abstract 】 Objective Overexpressions of epidermal growth factor (EGF) and EGF receptor have been associated with progression and invasive phenotype of pancreatic cancer. However, the underlying molecular mechanism by which EGF worked in pancreatic cancer cells has not been completely understood. In this study, effect of EGF on the invasion and metastasis of pancreatic cancer cells and its regulatory mechanism were investigated. Methods The effects of EGF on the proliferation, adhesion and invasion of pancreatic cancer cells were detected by WST-1 proliferation assay, adhesion assay and invasive assay, respectively. The activity and expression of MMP-2 and MMP-9 were examined by zymography, Western blot and RT-PCR, respectively. The activity of NF- κ B was examined by EMSA. Results EGF could significantly promote the invasiveness of pancreatic cancer cells but did not affect cell proliferation or adhesion. The expressions of NF- κ B and MMP-9 were significantly increased by EGF, but EGF did not affect the activity and expression of MMP-2. Furthermore, EGF stimulated the NF- κ B binding activity. Pretreatment with NF- κ B inhibitors, pyrrolidine dithiocarbamate (PDTC), could significantly inhibit the activity of NF- κ B induced by EGF. Meanwhile, the EGF-induced expression and activity of MMP-9, as well as cell invasiveness were also inhibited by NF- κ B inhibitor. Conclusion EGF could increase the expression and promote the invasiveness of MMP-9 via the activation of NF- κ B in pancreatic cancer cells, which implies that NF- κ B inhibitant, such as PDTC, may diminish the invasiveness of pancreatic cancer cells.
ObjectiveTo investigate the expression of β-catenin and Galectin-3 protein in human cervical carcinoma and its clinical pathological significance. MethodsEighty-three cervical specimens were collected from January 2010 to June 2013. By immunohistochemical method, β-catenin and Galectin-3 expression of the 83 cases of cervical carcinoma, 45 cases of intraepithelial neoplasia (CIN) and 25 normal cervix tissue (control) were detected. ResultsThe positive expression rate in cervical carcinoma of β-catenin and Galectin-3 was respectively 74.70% and 81.93%, which was significantly higher than that in intraepithelial neoplasia (ⅠandⅡ) and normal cervical tissue (P<0.05). Compared with cervical cancer, the expression of β-catenin and Galectin-3 in CINⅢ had no statistical significance (P>0.05). The positive expression of β-catenin was significantly correlated with histological grade of cervical cancer tissue, International Federation of Gynecology and Obstetrics grade and lymph node metastasis (P<0.05). The positive expression of Galectin-3 was closely related to histological grade of cervical cancer tissue and lymph node metastasis (P>0.05). Both β-catenin and Galectin-3 expression had no relationship with other clinical pathological parameters, such as age of patients, tumor size and pathological pattern of tumor (P>0.05). β-catenin expression had significant positive correlation with that of Galectin-3 (r=0.327, P=0.002). ConclusionThe expression of Galectin-3 and β-catenin increases obviously and is associated with abnormal clinical parameters (invasion or metastasis) in patients with cervical cancer. Galectin-3 and β-catenin may act as cancer metastasis and prognostic indicators in these patients.
ObjectiveTo investigate the influence of hypoxia on pro-metastasis induced by epithelial-mesenchymal transition (EMT) of human lung adenocarcinoma. MethodsThe human lung cancer cell line H460 was cultured in hypoxic condition and the morphologic changes of the cells were observed under the microscope. The EMT-related markers including E-cadherin and vimentin were detected by Western blot. Transwell migration assay and transwell invasion assay were employed to detect the migratory and invasive activity of cancer cells. ResultsHypoxic induced morphological changes were consistent with the mesenchymal phenotype, such as an elongated fibroblastic morphology, and conversion from a tightly packed epithelial cobblestone pattern to a loosely packed scattered phenotype. Compared with the control group, hypoxic attenuated the quantity of E-cadhenrin, but increased vimentin, which resulted in promotion of migration and invasion of H460. ConclusionHypoxia induces EMT in H460 and enhances the invasive and migratory abilities of lung cancer cells.
【Abstract】ObjectiveTo study the effect of down-regulation of E-cadherin on the invasion ability of tumor cells. MethodsHuman pancreatic carcinoma cell line JHP-1 was treated with E-cadherin antisense oligodeoxynucleotied (ASODN). The immunocytochemistry, Western blot were used to detect the expression and the contents of E-cadherin in the tumor cells, and the invasive ability of tumor cells were evaluated by invasive-MTT assay. Results Treated with E-cadherin ASODN, the expression of E-cadherin on JHP-1 cells were reduced, and the protein contents were decreased as well compared with control groups and ODN group. The invasive ability of JHP-1 cells to the basement membrane was increased (P＜0.001) compared with ODN group and control group. ConclusionE-cadherin was related to the invasive ability of tumor cells.
Objective To investigate the expression of Fascin-1 protein in colorectal adenocarcinoma, and the relationship with its clinicopathologic features. Methods The expressions of Fascin-1 protein in colorectal adenocarcinoma tissues of 60 cases, colorectal adenoma tissues of 30 cases and normal mucosa tissues (4 cm distance to neoplasm) of 30 cases were detected by Microwave-EliVisionTM immunohistochemistry method, and the relationship between the expression of Fascin-1 protein in colorectal adenocarcinoma tissues and its clinicopathologic characteristics was analyzed. Results The expression of Fascin-1 protein was located in cytoplasm. The positive expression rates of Facsin-1 protein were 3.3% (1/30), 30.0% (9/30) and 53.3% (32/60) in normal mucosa tissues, colorectal adenoma tissues and colorectal adenocarcinoma tissues, respectively. The expression of Fascin-1 was gradually increased in these three tissues, and there was statistical difference among the three tissues (Plt;0.05). The expessions of Fascin-1 protein in patients with serous membrane invasion, lymph node metastasis and TNM Ⅲ+Ⅳ were higher than those of non-serous membrane invasion, non-lymph node metastasis and TNM Ⅰ+Ⅱ (Plt;0.05), but there was no significant difference among different differentiation degrees (Pgt;0.05). Conclusion The high expression of Fascin-1 protein is correlated to high invasion ability and lymph node metastasis, which can play as a sensitive index in predicting the invasion and metastasis of colorectal adenocarcinoma.