Journal
ONCOLOGY REPORTS
Volume 40, Issue 6, Pages 3119-3135Publisher
SPANDIDOS PUBL LTD
DOI: 10.3892/or.2018.6733
Keywords
circRNA; cancer; miRNA sponges; transcription; biomarkers; database
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Funding
- Department of Thoracic Surgery, Affiliated Hospital of Qingdao University
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Circular RNAs (circRNAs) belong to a new type of endogenous non-coding RNAs (ncRNAs) that are derived from exons and/or introns, and are widely distributed in mammals. The majority of circRNAs have a specific expression profile in cells or tissues, as well as during different stages of development. CircRNAs were originally thought to be the products of mis-splicing. However, with the assistance of bioinformatics tools and the rapid development of high-throughput sequencing, an increasing body of evidence has suggested that circRNAs bind micro(mi)RNAs, and have a role as miRNA sponges, thereby regulating target mRNA splicing and transcription. Human diseases are closely associated with circRNAs, especially in cancer as their expression is typically altered during the progression of cancer; this may provide a novel type of biomarker for cancer diagnosis and prognosis. CircRNAs are becoming a key area of interest within the field of cancer research. In the present review, we summarize the known molecular mechanisms and biological origin of circRNAs, as well as their functions, especially those related to human tumors.
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