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Related Experiment Video

Updated: Jan 28, 2026

Identifying Targets of Human microRNAs with the LightSwitch Luciferase Assay System using 3'UTR-reporter Constructs and a microRNA Mimic in Adherent Cells

Identifying Targets of Human microRNAs with the LightSwitch Luciferase Assay System using 3'UTR-reporter Constructs and a microRNA Mimic in Adherent Cells

Published on: September 28, 2011

A novel method for stabilizing microRNA mimics.

Takuto Nogimori¹, Kazuya Furutachi¹, Koichi Ogami¹

¹Department of Biological Chemistry, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, 467-8603, Japan.

Biochemical and Biophysical Research Communications

|February 26, 2019

Summary

This summary is machine-generated.

Synthetic miRNA mimics, crucial for replacing lost microRNAs (miRNAs) in disease, are rapidly degraded. Researchers identified the OAS/RNase L pathway as responsible, offering a target for stabilization and improved miRNA replacement therapy.

Keywords:

Curcumin Oligoadenylate synthetase RNase L miRNA mimics

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Last Updated: Jan 28, 2026

Identifying Targets of Human microRNAs with the LightSwitch Luciferase Assay System using 3'UTR-reporter Constructs and a microRNA Mimic in Adherent Cells

Identifying Targets of Human microRNAs with the LightSwitch Luciferase Assay System using 3'UTR-reporter Constructs and a microRNA Mimic in Adherent Cells

Published on: September 28, 2011

Potato Virus X-Based microRNA Silencing VbMS In Potato.

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Published on: May 11, 2020

MicroRNA-based Regulation of Picornavirus Tropism

MicroRNA-based Regulation of Picornavirus Tropism

Published on: February 6, 2017

Area of Science:

Molecular Biology
Genetics
Biochemistry

Background:

MicroRNAs (miRNAs) are small non-coding RNAs regulating gene expression.
Down-regulation of miRNAs is linked to diseases like cancer and neurological disorders.
miRNA replacement therapy uses synthetic mimics to restore miRNA levels.

Purpose of the Study:

To investigate the degradation mechanism of synthetic miRNA mimics in human cells.
To identify factors responsible for miRNA mimic instability.
To explore strategies for stabilizing miRNA mimics for therapeutic applications.

Main Methods:

Cell-based assays to study miRNA mimic degradation.
Identification of key enzymes involved in mimic decay.
Testing small-molecule inhibitors targeting identified enzymes.

Main Results:

miRNA mimics are rapidly degraded via a novel pathway distinct from endogenous miRNA decay.
The 2'-5'-oligoadenylate synthetase (OAS)/RNase L pathway was identified as responsible for miRNA mimic degradation.
A small-molecule inhibitor blocking RNase L activity successfully stabilized miRNA mimics.

Conclusions:

The OAS/RNase L pathway is a critical determinant of miRNA mimic stability.
Inhibiting RNase L offers a promising strategy to enhance miRNA mimic stability.
These findings pave the way for more effective miRNA replacement therapies.