RESUMO
Objective:To study the expression of suppressor of cytokine signaling 1(SOCS1) and cellular myelocytomatosis oncogene(c-myc)in hepatocellular carcinoma(HCC),and to inves-tigate the relation between the expression of SOCS1 and c-myc in HCC.Methods:The expressions of SOCS1 and c-myc protein of 41 HCC tissues and surrounding tissues,as well as the tissues of 11 normal cases,were detected by immunohistochemical(IHC)staining using SP method.The expression of SOCS1 mRNA was detected by RT-PCR.And the clinical and pathological data were analysed.Results:Compared with the para-carcinoma and normal liver tissue,the levels of SOCS1 and SOCS1 mRNA in HCC tissues were significantly lower(P
RESUMO
Objective To study the relation between coagulation-fibrinolysis and metastasis, hormone receptor and TNM stage of breast cancer. Methods The plasm levels of six coagulation-fibrinolysis indexes of 30 breast cancer patients were tested, which included activated partial thromboplastin time(APTT), fibrinogen(FIB), D-dimer(D-Di), tissue type plasminogen activator (t-PA)and plasminogen activator inhibitor-1(PAI-1). Statistic analysis of the relation between the changes of these indexes and metastasis, hormone receptor and breast cancer cell proliferation was performed. Results There were statistically significant differences between the malignant and benign breast disease in FiB(3.05±0.44)g/L vs(3.39±0.52)g/L(P＜0.05),D-Di(0.27±0.06)μg/ml vs(0.36±0.16)μg/ml(P＜0.05) and PAI-1(26.14±3.30)ng/ml vs(34.59±3.68)ng/ml (P＜0.01). The levels of plasma FIB (3.70±0.47)g/L and PAI-1 (37.36±2.71)ng/ml in metastasis group were higher than those in the non-metastasis group (P＜0.01). Significantly higher levels of PAI-1(36.40±3.57)ng/ml(P＜0.05)in expression of Ki67≥30% in the patients with lymph node involvement were seen. Conclusion Coagulation-fibrinolysis indexes were related to the proliferation, invasion, metastasis and clinical stage of breast cancer and it can serve as an important marker for predicting breast cancer's biological behavior and prognosis.
RESUMO
Objective To detect the effect of cell density off both integrin αγβ6 expression and matrix metalloproteinase-9(MMP-9)secretion in colon cancer cells. Methods Flow cytometry was applied to analyze αγβ6 expression in human WiDr colon cancer cell lines and human HaCaT keratinocyte cells, respectively,at high-and low-cell density culture.The MMP-9 aetivity level for various coloIl cancer cell lines, WiDr and SW480 cells at high-and low-cell density culture was analyzed using Biotrak MMP-9 activity assay and Gelatin Zymography assay, respectively. Results High cell density significantly enhances integrin αγβ6 expression for WiDr cells expressing αγβ6 compared with low density,but no increase was observed for human keratinocyte HaCaT cells. Biotrak MMP-9 assay indicated that the amount of MMP-9 secreted per cell for WiDr and SW480 B6 cells at high cell density culture was(3.3±1.2)×10-7ng/cell and(27.2±3.0)× 10-7ng/cell respectively; However,at low cell density it was(1.8±0.7)× 10-7ng/cell and(10.9±2.0)×10-7 ng/cell,respectively. It was 2-3-fold higher for WiDr and SW480 β6 cells at high cell density compared with that at low cell density, but no density-dependent increase observed for SW480 wild cells lack αγβ6 expression(t=0.47,P＞0.05),MMP-9 secretion for SW480 wild cells was(3.9±1.7)× 10-7 ng/cell at hish cell density and(3.8 ±0.7)×10-7 ng/cell at low eell density(P＞0.05),respectively. Gelatin zymography assay also indicated that the level of MMP-9 in SW480 B6 cells expressing αγβ6 was evidently higher at high density than at low density, however no density-dependent increase observed for SW480 wild cells and HaCaT cells. Conclusions High cell density induces integrin αγβ6 expression and promotes MMP-9 secretion in colon cancer cells, which constitutes the basis for a self-perpetuating system of tumor infiltrating growth in colon cancer progression.