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Acute Kidney Injury I: Introduction

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Introduction:Acute Kidney Injury (AKI) describes a swift decrease in kidney function occurring over hours to days, characterized by the kidneys' failure to remove waste products from the bloodstream. This leads to dangerous complications like metabolic acidosis, fluid overload, and electrolyte imbalances, such as hyperkalemia, which can cause life-threatening arrhythmias. AKI is common in both hospital and outpatient settings, often triggered by dehydration, sepsis, or exposure to nephrotoxic...

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Related Experiment Video

Updated: Jun 11, 2025

A Quantitative Detection Method for MicroRNAs in the Kidney of an Ischemic Kidney Injury Mouse Model

A Quantitative Detection Method for MicroRNAs in the Kidney of an Ischemic Kidney Injury Mouse Model

Published on: September 11, 2020

miRNA and mRNA Signatures in Human Acute Kidney Injury Tissue.

Danielle Janosevic¹, Thomas De Luca¹, Ricardo Melo Ferreira¹

¹Division of Nephrology, Indiana University School of Medicine, Indianapolis, Indiana.

The American Journal of Pathology

|September 27, 2024

Summary

This summary is machine-generated.

MicroRNAs (miRNAs) play a key role in acute kidney injury (AKI) progression to chronic kidney disease (CKD). This study identifies specific miRNA signatures linked to AKI pathways and disease progression, offering insights into kidney disease mechanisms.

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Area of Science:

Nephrology
Molecular Biology
Genomics

Background:

Acute kidney injury (AKI) is a significant risk factor for developing chronic kidney disease (CKD).
The molecular mechanisms, particularly the role of microRNAs (miRNAs), driving AKI recovery and progression to CKD remain poorly understood.
Understanding these mechanisms is crucial for developing targeted therapies.

Purpose of the Study:

To investigate the role of miRNAs in the molecular pathways of human AKI.
To identify miRNA and mRNA signatures associated with AKI and its progression to CKD.
To explore the relationship between specific miRNAs and gene expression in kidney injury.

Main Methods:

Performed miRNA and mRNA sequencing on human kidney tissues from patients with AKI, minimal change disease, and healthy controls.
Analyzed transcriptomic data to identify differentially expressed genes and miRNAs.
Correlated miRNA expression with mRNA signatures and pathways involved in kidney disease.

Main Results:

Nephrectomy tissues showed an injury signature similar to AKI, distinct from minimal change disease.
AKI transcriptomes were enriched in cell adhesion, epithelial-to-mesenchymal transition, and cell cycle arrest pathways.
Upregulated miRNAs (miR-146a, miR-155, miR-142, miR-122) in AKI were linked to immune recruitment, inflammation, and EMT pathways.
miR-122 and miR-146 correlated with downregulation of DDR2 and IGFBP6, genes implicated in kidney disease recovery and progression.

Conclusions:

Integrated miRNA and mRNA signatures provide a comprehensive view of molecular events in human AKI.
Specific miRNAs (miR-146a, miR-155, miR-142, miR-122) are associated with key AKI-related pathways.
These findings highlight potential miRNA targets for modulating AKI progression to CKD.