简介：
Overview
This article describes a protocol for measuring glomerular filtration rate (GFR) in conscious, freely moving mice using a transdermal GFR monitor. This method allows for accurate assessment of renal function without the complications of anesthesia.
Key Study Components
Area of Science
- Nephrology
- Renal function assessment
- Transdermal monitoring techniques
Background
- Transdermal GFR measurement (tGFR) is the most accurate method for assessing renal function in mice.
- It can be performed in conscious, freely moving mice, avoiding anesthesia complications.
- This technique allows for multiple measurements in a single day.
- tGFR can be used for serial measurements in various disease settings.
Purpose of Study
- To provide a detailed protocol for measuring GFR in mice.
- To demonstrate the advantages of tGFR over traditional methods.
- To highlight the implications of tGFR in monitoring kidney function.
Methods Used
- Preparation of the mouse by shaving and applying depilation cream.
- Attachment of the transdermal GFR monitor to the mouse.
- Administration of FITC-sinistrin for GFR measurement.
- Data acquisition and analysis using specialized software.
Main Results
- tGFR measurements provide high precision and sensitivity in assessing renal function.
- Clearance of FITC-sinistrin is significantly delayed in mice with acute kidney injury.
- Transdermal measurements correlate closely with histological assessments of renal injury.
- tGFR is more sensitive than traditional biomarkers like serum creatinine.
Conclusions
- Transdermal GFR measurement is a minimally invasive and reliable method for monitoring kidney function.
- This technique allows for repeated assessments over time in individual animals.
- It provides a more accurate evaluation of renal function compared to traditional methods.
What is the main advantage of using tGFR?
The main advantage of tGFR is its ability to measure renal function in conscious mice, providing high precision and avoiding anesthesia complications.
How is the tGFR measurement performed?
The measurement involves preparing the mouse, attaching a transdermal monitor, administering FITC-sinistrin, and recording the clearance over time.
Can tGFR be used for repeated measurements?
Yes, tGFR can be performed repeatedly in individual mice, allowing for monitoring of changes in kidney function over time.
What does FITC-sinistrin clearance indicate?
FITC-sinistrin clearance indicates the glomerular filtration rate, with delayed clearance suggesting impaired renal function.
How does tGFR compare to traditional biomarkers?
tGFR provides a more sensitive and reliable measure of kidney function than traditional biomarkers like serum creatinine and blood urea nitrogen.
Is the tGFR method invasive?
No, the tGFR method is minimally invasive, allowing for accurate monitoring of kidney function without significant stress to the animal.
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