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Objective: miRNA-194 were knocked down or overexpressed in Osteosarcoma Cell Line SOSP-9607 to investigate its effect on Metastasis of human Osteosarcoma which to provide the foundation of theory of miRNA-194 as a new target of osteosarcoma therapy. Methods: We transfected human osteosarcoma cell lines SOSP-9607 by using recombinant lentiviruses and divided the cells into three groups with different levels of miRNA-194. Then the stable transfected cells were used in transwell and wound healing assay. Results:1) The transfection and selection of miRNA-194 using recombinant lentiviral expression vector was finished correctly and different levels of miRNA-194 were got sucessfully. 2) Results in the transwell migration and invasion assay showed significantly lower numbers of OE SOSP-9607 cells (28.60± 4.36) and (21.25± 6.42) and significantly higher numbers of KD SOSP-9607 cells (132.60± 15.64; 115.76± 11.38) compared with other groups (p<0.05). The wound healing assay showed that cells in OE groups exhibited a significant decrease in migration rate compared to the other three groups(p<0.05). Conclusions: miRNA-194 could inhibit metastasis of Osteosarcoma Cell Line SOSP-9607. MiRNA-194 could be further explored as a potential target in Osteosarcoma diagnosis and therapy. [ABSTRACT FROM AUTHOR]

Objective: To forecast and verify the target genes of miRNA-194 in human osteosarcoma and establish some theoretical basis for osteosarcoma treatment and element experience of miRNA-194 for further research. Methods: Potential target gene of miRNA-194 was predicted using bioinformatics and were verified in gene and protein levels. Moreover, luciferase reporter assay was used to confirm whether CDH2 was direct targets of miRNA-194. Results: Potential target genes of miRNA-194 were predicted by using bioinformatics. Moreover, luciferase activity of the wild-type PTEN-3'-UTR reporter was significantly suppressed in miRNA-194up-regulation group compared with other groups in SOSP-9607 cells(P<0.01) while down-regulation group could significantly increase it(P<0.01). At the same time, western blot analysis revealed that miRNA-194 expression could affect the expression of CDH2 protein while there was no significant difference on m RNA level(P<0.05). Conclusion: CDH2, one target gene of miRNA-194, was predicted and verified, which provided the theoretical basis for the next study of miRNA-194 in the osteosarcoma. [ABSTRACT FROM AUTHOR]

Objective: To explore and describe the relationship of miRNA-192 function and clinicopathological features in human osteosarcoma and analyze the relationship between miRNA-192 and mortality, which support some theoretical basis for osteosarcoma treatment and element experience for further research. Methods: Real-time quantitative PCR analysis were used in 50 clinical osteosarcoma samples which were followed up. Then the relationship of miRNA-192 function and clinicopathological features(like sex,age) in human osteosarcoma were explored. Results: We found that there were statistically significant relationships between miRNA-192 expression and some clinicopathological features of osteosarcoma, including age(P = 0.028), clinical stage(P = 0.007), distant metastasis(P = 0.013) and patient mortality(P=0.001). Conclusion: In clinical specimens, miRNA-192 expression levels were correlated with some clinicopathological features of osteosarcoma, including age, clinical stage, distant metastasis and patient mortality, which provided the theoretical basis for the next study especially the biological therapy of miRNA-192 in the osteosarcoma. [ABSTRACT FROM AUTHOR]

Objective: We examined the effects of miRNA-194 on the capacities of tumor formation and pulmonary metastasis of osteosarcoma in nude mice by using recombinant lentiviruses. All these wouLd provide the foundation of theory to explore microRNA- 194 as a new target of osteosarcoma therapy. Methods: we transfected human osteosarcoma cell lines U2-OS by using recombinant lentiviruses and divided the mice into three groups. Then we put the cells into the mice to built the metastasis model of rude mice. 5 weeks later the mice were killed to compare the size and weight of tumor in leg and lung. Results: 1) The size and weight of miRNA- 194-down were obviously higher than that in other groups (P<0.05). 2) The lung of rude mice of miRNA-194-up cell were obviously better than that in other groups(P<0.05). 3) It were certified that the tumor were osteosarcoma and metastatic tumor. Conclusion: In vivo, miRNA-194 couLd significantly inhibit the capacities of tumor formation and pulmonary metastasis which declare that miRNA-194 may play the role of tumor suppressor genes in osteosarcoma, which provide a good foundation for the study of miRNA-194. [ABSTRACT FROM AUTHOR]

Objective: Use microRNA microarray chip and real time quantitative PCR method to analysis the relative expression levels of miR-15a-5p and miR-16-5p, then compare the difference between osteosarcoma paraffin block samples and peritumoral tissue. Methods: 34 cases of osteosarcoma paraffin block samples were chosen, microRNAs microarray chip and real time quantitative PCR method was used to measure the relative expression levels of miR-15a-5p and miR-16-5p. Results: microRNAs microarray chip results showed that the expression level ofmiR-15a-5p (miR-16-5p) in tumor tissue was 1.79 (1.62) times lower than the adjacent tissue. Real time quantitative PCR results showed that compare with tumor adjaccnt tissues, the expression level of miR-15a-5p and miR-16-5p was low in osteosarcoma paraffin block samples. The results were considered significant through statistical analysis (P＜0.05). Further analysis results showed that the expression level of miR-15a-5p (miR-16-5p) in tumor tissue was 3.14 (5.65) times lower than the adjacent tissue. Conclusions: miR-15a-5p and miR-16-5p was low expressed in osteosarcoma cells, which suggest that these two microRNAs could be act as oncogene. [ABSTRACT FROM AUTHOR]