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Review

Seeing Is Believing: Visualizing Circular RNAs

1
Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha 751023, India
2
School of Biotechnology, KIIT University, Bhubaneswar, Odisha 751024, India
*
Author to whom correspondence should be addressed.
These authors contributed equally to this paper.
Received: 30 September 2020 / Revised: 2 November 2020 / Accepted: 9 November 2020 / Published: 11 November 2020
Advancement in the RNA sequencing techniques has discovered hundreds of thousands of circular RNAs (circRNAs) in humans. However, the physiological function of most of the identified circRNAs remains unexplored. Recent studies have established that spliceosomal machinery and RNA-binding proteins modulate circRNA biogenesis. Furthermore, circRNAs have been implicated in regulating crucial cellular processes by interacting with various proteins and microRNAs. However, there are several challenges in understanding the mechanism of circRNA biogenesis, transport, and their interaction with cellular factors to regulate cellular events because of their low abundance and sequence similarity with linear RNA. Addressing these challenges requires systematic studies that directly visualize the circRNAs in cells at single-molecule resolution along with the molecular regulators. In this review, we present the design, benefits, and weaknesses of RNA imaging techniques such as single-molecule RNA fluorescence in situ hybridization and BaseScope in fixed cells and fluorescent RNA aptamers in live-cell imaging of circRNAs. Furthermore, we propose the potential use of molecular beacons, multiply labeled tetravalent RNA imaging probes, and Cas-derived systems to visualize circRNAs. View Full-Text
Keywords: circRNA; FISH; BaseScope; aptamer; localization; RNA-binding protein; miRNA circRNA; FISH; BaseScope; aptamer; localization; RNA-binding protein; miRNA
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MDPI and ACS Style

Bejugam, P.R.; Das, A.; Panda, A.C. Seeing Is Believing: Visualizing Circular RNAs. Non-Coding RNA 2020, 6, 45. https://0-doi-org.brum.beds.ac.uk/10.3390/ncrna6040045

AMA Style

Bejugam PR, Das A, Panda AC. Seeing Is Believing: Visualizing Circular RNAs. Non-Coding RNA. 2020; 6(4):45. https://0-doi-org.brum.beds.ac.uk/10.3390/ncrna6040045

Chicago/Turabian Style

Bejugam, Pruthvi R., Aniruddha Das, and Amaresh C. Panda 2020. "Seeing Is Believing: Visualizing Circular RNAs" Non-Coding RNA 6, no. 4: 45. https://0-doi-org.brum.beds.ac.uk/10.3390/ncrna6040045

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