RESUMO
Transfer RNA-derived small RNAs (tsRNAs) are an emerging class of non-coding single-stranded RNA that are derived from mature transfer RNA (tRNA) or tRNA precursors. They primarily consist of tRNA-derived RNA fragments (tRFs) and tRNA halves (tiRNAs). Studies have confirmed that tsRNAs are differentially expressed in a variety of tumors and involved in tumor processes including proliferation, invasion, and metastasis. Although the underlying mechanisms have not been fully elucidated, tsRNAs have the potential to be new biomarkers and therapeutic targets for tumors. This review provides an overview of the relationship between tsRNAs and common tumors to provide new ideas for the diagnosis, treatment, and prevention of tumors.
RESUMO
Noncoding small RNAs are the important regulators of vital processes. Through the high-throughput sequencing and analyses of small RNA fragments, a new class of non-coding small RNAs has been presented, which can be matched to the known tRNA gene. The different sources of tRFs are classified into various types depending on where they match on the parental tRNA. The tRFs can be expressed in a variety of organisms. Recent studies have found that the tRFs have a variety of biological functions in the regulation of gene expression, epigenetics，tumor suppression, neurodegeneration and so on. As a regulatory RNA, the tRFs play an important role in development and progression of tumors, and are known to play regulatory roles in the proliferation and metastasis of tumor cells. This article reviews the research progress on the classification，biological function and role of tRFs in malignant tumors.