As lncRNAs have increasingly been investigated, they are no longer simply defined as RNAs with no transcription capability. Studies have identified significant associations between the abnormal expression of lncRNAs and human diseases, particularly the mechanisms by which lncRNAs play a part in cancers, which are of considerable attention to researchers. As a result of the complex spatial structure, the mechanisms of interaction of lncRNAs in cancer cells are also complicated and diversified. Among a series of lncRNAs, TUG1, which is now considered to be a very high-value lncRNA, has recently been identified to express abnormally in some malignancies, leading to different alterations in cancer cells proliferation, migration, invasion, apoptosis, and drug resistance, and hence promoting or inhibiting cancer progression. Current studies have implicitly indicated that TUG1 can be used as a therapeutic target for human cancers. However, the biological functions of TUG1 have been studied for a short period of time, and the complete molecular mechanism still needs to be clarified. Accordingly, this review focuses on the principal molecular mechanisms of TUG1 in human cancers and the specific mechanisms of action in different cancer development processes based on existing studies.
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