Related Experiment Video
Updated: May 6, 2026

A Quantitative Detection Method for MicroRNAs in the Kidney of an Ischemic Kidney Injury Mouse Model
Published on: September 11, 2020
MicroRNA-21 in the pathogenesis of acute kidney injury
Ya-Feng Li1, Ying Jing, Jielu Hao
1Department of Nephrology and Hemodialysis Center, Second Hospital of Shanxi Medical University, Taiyuan, 030001, China, Dr.yafengli@gmail.com.
Abstract:
Acute kidney injury (AKI), associated with significant morbidity and mortality, is widely known to involve epithelial apoptosis, excessive inflammation, and fibrosis in response to ischemia or reperfusion injury, which results in either chronic pathological changes or death. Therefore, it is imperative that investigations are conducted in order to find effective, early diagnoses, and therapeutic targets needed to help prevent and treat AKI. However, the mechanisms modulating the pathogenesis of AKI still remain largely undetermined. MicroRNAs (miRNAs), small non-coding RNA molecules, play an important role in several fundamental biological and pathological processes by a post transcriptional regulatory function of gene expression. MicroRNA-21 (miR-21) is a recently identified, typical miRNA that is functional as a regulator known to be involved in apoptosis as well as inflammatory and fibrotic signaling pathways in AKI. As a result, miR-21 is now considered a novel biomarker when diagnosing and treating AKI. This article reviews the correlative literature and research progress regarding the roles of miR-21 in AKI.
Insights
MicroRNA-21 (miR-21) plays a key role in acute kidney injury (AKI) by regulating apoptosis, inflammation, and fibrosis. This research highlights miR-21 as a potential biomarker for early diagnosis and treatment of AKI.
Area of Science:
- Nephrology
- Molecular Biology
- Biochemistry
Background:
- Acute kidney injury (AKI) presents significant morbidity and mortality, involving epithelial apoptosis, inflammation, and fibrosis.
- The precise mechanisms driving AKI pathogenesis remain largely undetermined.
- MicroRNAs (miRNAs) are crucial post-transcriptional regulators of gene expression in biological and pathological processes.
Purpose of the Study:
- To review the literature on the role of microRNA-21 (miR-21) in the pathogenesis of AKI.
- To explore miR-21 as a potential biomarker for AKI diagnosis and therapy.
Main Methods:
- Literature review of correlative studies on miR-21 and AKI.
- Analysis of research progress regarding miR-21's function in AKI.
Main Results:
- MicroRNA-21 (miR-21) is implicated in regulating apoptosis, inflammation, and fibrosis in AKI.
- miR-21 functions as a key regulator in the signaling pathways involved in AKI.
Conclusions:
- miR-21 is recognized as a novel biomarker for the diagnosis and treatment of AKI.
- Further investigation into miR-21's role is crucial for developing effective AKI interventions.
Related Concept Videos
Acute Kidney Injury II: Pathophysiology
Acute Kidney Injury I: Introduction
Acute Kidney Injury IV: Diagnostic Studies and Prevention
Acute Kidney Injury III: Clinical Manifestations
Acute Kidney Injury V: Interprofessional Care
Acute Kidney Injury VI: Nursing Management

