In vivo Measurement of Knee Extensor Muscle Function in Mice

作者： Camille R. Brightwell1,2, Ted G. Graber3, Benjamin D. Brightwell4,5, Matthew Borkowski6, Brian Noehren5,7, Christopher S. Fry1,2 1Department of Athletic Training and Clinical Nutrition,University of Kentucky, 2Center for Muscle Biology,University of Kentucky, 3Department of Physical Therapy,East Carolina University, 4Kinesiology and Health Promotion Graduate Program,University of Kentucky, 5Biomotion Lab, College of Health Sciences,University of Kentucky, 6Aurora Scientific, 7Department of Physical Therapy, College of Health Sciences,University of Kentucky

简介：

Overview

This study presents a novel, non-invasive method for repeatedly measuring the knee extensor maximal strength in mice, which is crucial for understanding functional adaptations to aging, disease, and rehabilitation. The method focuses on quantifying isometric peak tetanic torque and supports longitudinal assessments, contributing to preclinical studies on musculoskeletal recovery.

Key Study Components

Research Area

• Musculoskeletal health
• Aging and injury recovery
• Preclinical research methods

Background

• Knee extensor strength is a critical functional outcome.
• Current methods for measuring muscle strength in rodent studies are limited.
• A non-invasive approach is necessary for effective longitudinal assessments.

Methods Used

• Electrode placement for maximal stimulation of knee extensors
• Mice as the biological model
• Isometric tension measurement techniques

Main Results

• Establishment of a protocol for measuring peak isometric tetanic torque.
• Demonstrated reproducibility of torque measurements over time.
• Validated the method’s efficacy in assessing muscle strength changes.

Conclusions

• The study demonstrates that the novel method can effectively measure knee extensor strength in mice.
• It has significant relevance for research into recovery from injuries and the effects of osteoarthritis.

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