Related Experiment Video
Updated: Jan 21, 2026

Detection of MicroRNA Expression in the Kidneys of Immunoglobulin A Nephropathic Mice
Published on: July 8, 2020
MicroRNA-101-5p Suppresses the Expression of the Ras-Related Protein RAP1A
Yoshihiko Shibayama1, Yoshitada Kubo1, Tsutomu Nakagawa1
1Department of Drug Formulation, Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido.
Abstract:
MicroRNAs (miRs) are small, non-coding RNAs that negatively regulate gene expression. The stem-loop sequence miR-101-1 generates mature miR-101-5p and miR-101-3p. The function and target mRNA of miR-101-5p have not yet been elucidated in detail. Here, we demonstrate that miR-101-5p inhibits the expression of RAP1A, a member of the RAS gene family. Transfection of a miR-101-5p mimic significantly inhibited the expression of RAP1A mRNA in HeLa, HEK293, A549, and COLO201 cells. The same treatment significantly inhibited cell proliferation. The cytostatic effect with transfection of miR-101-5p was antagonized by treatment with the RAP inhibitor salirasib. These results suggested that miR-101-5p inhibits RAP1A, and thus, the expression levels of miR-101-5p regulate cell proliferation.
Related Concept Videos
MicroRNAs
MicroRNAs
The Ras Gene
Ras is a...
Small GTPases - Ras and Rho
Three regulatory proteins control their activity:
Regulation of Expression Occurs at Multiple Steps
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
What is Gene Expression?
Gene expression is the process in which DNA directs the synthesis of functional products, that is, proteins. Cells can regulate gene expression at various stages. It allows organisms to generate different cell types and enables cells to adapt to internal and external factors.
Genetic Information Flows from DNA to RNA to Protein
A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is made up of nucleotides and proteins consist of amino...

