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Updated: May 16, 2026
A Quantitative Detection Method for MicroRNAs in the Kidney of an Ischemic Kidney Injury Mouse Model
Published on: September 11, 2020
MicroRNA signatures in ischemia-reperfusion injury
Kao-Ping Chang1, Hsiao-Chen Lee, Shu-Hung Huang
1Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan. kapich@kmu.edu.tw
Background:
MicroRNAs (miRs) are involved in gene expression and function, but little is known of their function in ischemia-reperfusion injury (IRI), which plays a critical role in flap compromise during microvascular flap surgeries. This article aimed to determine the expression profiles of miRs in rat flap surgeries after IRI.
Methods:
Vessel specimens in rat epigastric flap were initially determined for miRs survey after 2 hours of ischemia and 2 hours of reperfusion. Their miR expressions were further quantified after 2 hours of ischemia and subsequent reperfusion for 2 and 24 hours.
Results:
Only 3 miRs (miR-21, miR-193-3p, and miR-210) in rat vessels, but not in flap tissues, were significantly up-regulated at 24 hours of reperfusion after 2 hours of ischemia.
Conclusions:
Our findings provide insights into deregulated expressions of miRs in flap surgeries after IRI. They might provide a further therapeutic consideration to prevent vascular compromise due to IRI in flap surgeries.
Insights
MicroRNAs (miRs) are key in gene regulation. This study found specific miRs (miR-21, miR-193-3p, miR-210) were upregulated in rat vessels after ischemia-reperfusion injury (IRI), offering insights for flap surgery complications.
Area of Science:
- Vascular Biology
- Molecular Biology
- Surgical Research
Background:
- MicroRNAs (miRs) regulate gene expression but their role in ischemia-reperfusion injury (IRI) is unclear.
- IRI significantly impacts flap compromise in microvascular flap surgeries.
- Understanding miR function in IRI is crucial for improving surgical outcomes.
Purpose of the Study:
- To investigate the expression profiles of microRNAs (miRs) in rat flap models following ischemia-reperfusion injury (IRI).
- To identify specific miRs that are deregulated in response to IRI in the context of flap surgery.
Main Methods:
- Rat epigastric flaps underwent 2 hours of ischemia followed by 2 or 24 hours of reperfusion.
- MicroRNA (miR) expression in vessel specimens was quantified using quantitative real-time PCR.
- Expression levels were compared between different reperfusion time points.
Main Results:
- Three specific miRs—miR-21, miR-193-3p, and miR-210—showed significant upregulation.
- This upregulation was observed specifically in rat vessels, not in flap tissues.
- The significant changes occurred at 24 hours of reperfusion after 2 hours of ischemia.
Conclusions:
- The study identified specific deregulated miRs in rat vessels following IRI in a flap surgery model.
- These findings suggest potential therapeutic targets for mitigating vascular compromise caused by IRI.
- Further research into these miRs could lead to improved strategies for preventing flap failure in surgical procedures.