MicroRNA-7 Inhibits Rotavirus Replication by Targeting Viral NSP5 In Vivo and In Vitro
Related Experiment Video
Updated: Dec 28, 2025
Assays for the Specific Growth Rate and Cell-binding Ability of Rotavirus
Published on: January 28, 2019
Yan Zhou1, Linlin Chen1, Jing Du1
1Institute of Medical Biology, Chinese Academy of Medical Science & Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on severe Infectious Disease, Kunming 650118, China.
Abstract:
Rotavirus (RV) is the major causes of severe diarrhea in infants and young children under five years of age. There are no effective drugs for the treatment of rotavirus in addition to preventive live attenuated vaccine. Recent evidence demonstrates that microRNAs (miRNAs) can affect RNA virus replication. However, the antiviral effect of miRNAs during rotavirus replication are largely unknown. Here, we determined that miR-7 is upregulated during RV replication and that it targets the RV NSP5 (Nonstructural protein 5). Results suggested that miR-7 affected viroplasm formation and inhibited RV replication by down-regulating RV NSP5 expression. Up-regulation of miR-7 expression is a common regulation method of different G-type RV-infected host cells. Then, we further revealed the antiviral effect of miR-7 in diarrhea suckling mice model. MiR-7 is able to inhibit rotavirus replication in vitro and in vivo. These data provide that understanding the role of cellular miR-7 during rotaviral replication may help in the identification of novel therapeutic small RNA molecule drug for anti-rotavirus.
Insights
MicroRNAs (miRNAs) show antiviral potential against rotavirus (RV). This study found that miR-7 inhibits RV replication by targeting the RV NSP5 protein, offering a potential new therapeutic strategy.
Area of Science:
- Virology
- Molecular Biology
- Microbiology
Background:
- Rotavirus (RV) is a primary cause of severe diarrhea in young children.
- Current treatments for rotavirus are limited to supportive care and preventive vaccines.
- MicroRNAs (miRNAs) are increasingly recognized for their role in regulating viral infections.
Purpose of the Study:
- To investigate the antiviral effects of miRNAs during rotavirus replication.
- To determine if miR-7 plays a role in controlling rotavirus infection.
Main Methods:
- Quantifying miR-7 expression in rotavirus-infected cells.
- Identifying the target of miR-7 within the rotavirus replication cycle.
- Assessing the impact of miR-7 on viroplasm formation and viral replication.
- Evaluating the efficacy of miR-7 in a mouse model of rotavirus diarrhea.
Main Results:
- miR-7 expression was upregulated during rotavirus replication.
- miR-7 directly targets the rotavirus NSP5 protein.
- miR-7 inhibited rotavirus replication by downregulating NSP5 expression and affecting viroplasm formation.
- miR-7 demonstrated antiviral activity both in vitro and in vivo.
Conclusions:
- Upregulation of miR-7 is a host response to rotavirus infection across different G-types.
- miR-7 exhibits significant antiviral properties against rotavirus.
- Cellular miR-7 represents a potential target for novel small RNA-based anti-rotavirus therapeutics.
Related Concept Videos
01:22MicroRNAs
01:22MicroRNAs
02:15Experimental RNAi
01:23RNA 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...