Related Experiment Video
Updated: Jan 15, 2026

In Silico Identification and Characterization of circRNAs During Host-Pathogen Interactions
Published on: October 21, 2022
Roles and Applications of Circular RNA in Virus Infection
Fang Gou1, Yanmei Gao1, Keke Zhong1
1Engineering Research Center of Polyploid Fish Reproduction and Breeding of the State Education Ministry, College of Life Sciences, Hunan Normal University, Changsha 410081, China.
Abstract:
Circular RNAs (circRNAs) are novel types of covalently closed single-stranded RNA formed by the backsplicing of precursor mRNAs (pre-mRNAs). Recently, circRNAs have been shown to play a crucial role in various diseases, including cancers, cardiovascular and cerebrovascular diseases, and autoimmune diseases. Accumulating evidence has demonstrated that both host-derived and virus-encoded circRNAs play pivotal roles during viral infection, including modulating viral entry, genome replication, latency establishment, and the host antiviral immune responses while simultaneously facilitating viral immune evasion. However, their roles during viral infections and circRNA-host interactions remain to be further investigated. Therefore, this article reviews the key characteristics and biological functions of circRNAs, as well as recent advances in understanding the interactions between circRNAs from different sources and viral infections, which will offer insights for developing therapies targeting virus-associated diseases.
Insights
Circular RNAs (circRNAs) are key players in viral infections, influencing viral replication and host immunity. Understanding circRNA-virus interactions is vital for developing new antiviral therapies.
Area of Science:
- Molecular Biology
- Virology
- Immunology
Background:
- Circular RNAs (circRNAs) are formed by pre-mRNA backsplicing and are implicated in various diseases.
- Both host and viral circRNAs impact viral infections, affecting viral replication and host immune responses.
- The precise roles of circRNAs in viral infections and their interactions with hosts require further investigation.
Purpose of the Study:
- To review the characteristics and functions of circRNAs.
- To summarize recent advances in circRNA-virus interactions during infection.
- To provide insights for developing therapies against virus-associated diseases.
Main Methods:
- Literature review of circRNA functions and roles in viral infections.
- Analysis of studies on host-derived and virus-encoded circRNAs.
- Synthesis of current knowledge on circRNA-host-virus interactions.
Main Results:
- CircRNAs modulate critical stages of viral infection, including entry, replication, and latency.
- CircRNAs influence host antiviral immunity and viral immune evasion strategies.
- Evidence highlights the dual role of circRNAs in promoting or inhibiting viral pathogenesis.
Conclusions:
- CircRNAs are significant regulators in viral infections, impacting both viral and host factors.
- Further research into circRNA-host interactions is crucial for understanding viral pathogenesis.
- Targeting circRNAs presents a promising therapeutic strategy for viral diseases.
Related Concept Videos
Viruses with RNA Genomes
Size and Structure of Viral Genomes
Retrovirus Life Cycles
RNA Interference
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
Experimental RNAi
siRNA - Small Interfering RNAs
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...

