Long noncoding RNAs (lncRNAs) are pervasively transcribed and have a critical role in genome regulation. Alterations in the expression of several lncRNAs have been observed in some types of cancers; however, the contributions of lncRNAs to osteosarcoma remain unknown.
Here, researchers at the Second Xiangya Hospital of Central South University, China describe the expression profile of lncRNAs in osteosarcomas compared with paired adjacent noncancerous tissue using microarray analysis. In their study, 25733 lncRNAs were expressed in osteosarcoma; 403 lncRNAs were consistently over-regulated and 798 lncRNAs were consistently under-regulated in all samples analyzed (⩾2.0-fold, p<0.05). Quantitative real-time polymerase chain reaction (PCR) was used to validate six over-regulated and four under-regulated lncRNAs. Bioinformatic analysis (gene ontology analysis, pathway analysis and network analysis) was used for further research. Pathway analysis indicated that 32 pathways corresponded to under-regulated transcripts and that 34 pathways corresponded to over-regulated transcripts (p-value cut-off is 0.05).
These results are the first to reveal differentially expressed lncRNAs in osteosarcoma and suggest that lncRNAs may be novel candidate biomarkers for the diagnosis of osteosarcoma and potential targets for therapy.
- Li JP, Liu LH, Li J, Li H, Jiang XW, Ouyang YR, Liu YQ, Zhong H, Chen Y, Xiao T. (2013) Microarray expression profile of long noncoding RNAs in human osteosarcoma. Biochem Biophys Res Commun [Epub ahead of print]. [abstract]