**7. Conclusions**

RNA used to be just a messenger between coding genes and proteins encoded by them. However, "transcriptional noise" is turning out to be a very important part of regulation processes. With the discovery of LncRNA and their functions, the new world of molecular biology is emerging. There is much research still on the way towards a deeper understanding of regulation processes in which lncRNA is one of the important players. LncRNA deregulation in human disease is unveiling the complexity of cellular processes. Studying the mechanisms of lncRNA involvement in oncogenic and tumor suppressive pathways will lead to new cancer diagnostic markers and will pave the way to novel therapeutic targets.

### **Acknowledgments**

This work was supported by program P3-0054 of the Slovenian Research Agency.
