Gait Analysis in Rodent Models of Osteoarthritis

Gait analysis in rodent models of osteoarthritis provides a quantitative assessment of locomotor dysfunction associated with joint degeneration and pain. By combining surgical or chemical induction methods—such as medial meniscus transection (MMT) or monosodium iodoacetate (MIA) injection—with high-speed videography, pressure-sensitive walkways or force-plate systems, researchers capture spatiotemporal and kinetic parameters of walking. Key metrics include stride length, stance and swing durations, paw placement and ground reaction forces, which collectively reflect compensatory adaptations to joint instability and cartilage loss. Advances in automated platforms and computational tools have enhanced the sensitivity, throughput and reproducibility of these measurements. Insights from rodent gait studies inform the evaluation of novel therapeutics, elucidate early pathogenic mechanisms and guide translational efforts towards improving mobility and pain management in human osteoarthritis.

Research from Nature Portfolio

Recent studies have introduced a machine-learning approach to infer three-dimensional rodent limb and body poses from single-camera videos. This technique accurately reconstructs joint kinematics, including stride length, even under occlusion, and offers potential for continuous, non-invasive monitoring in home-cage environments. In a complementary development, an open-source gait analysis platform has been made available, comprising modular hardware and bespoke software for quantifying compensatory gait patterns across multiple disease models, including osteoarthritis. This resource has validated unique spatiotemporal signatures of joint degeneration in rodents, facilitating standardised assessments of preclinical interventions and enhancing reproducibility across laboratories.

Gait Analysis in Rodent Models of Osteoarthritis publication trend

The graph below shows the total number of articles in gait analysis in rodent models of osteoarthritis across all publications each year (not limited to Nature Index journals).

Technical terms

Spatiotemporal parameters: Measures of timing and spatial characteristics of gait, such as stride length, stance and swing durations.

Ground reaction forces: Forces exerted by the walking surface on the limb during stance, used to assess load distribution and joint function.

Three-dimensional pose estimation: Computational derivation of 3D body and limb positions from one or more camera views.

CatWalk XT: A commercial automated walkway system that records paw prints and evaluates multiple gait parameters in rodents.

GAITOR Suite: An open-source assembly of hardware and software for customisable preclinical rodent gait analysis.

Medial meniscus transection (MMT): A surgical procedure that destabilises the knee joint in rodents to model osteoarthritis.

References

1. Intra-articular delivery of an indoleamine 2,3-dioxygenase galectin-3 fusion protein for osteoarthritis treatment in male Lewis rats. Arthritis Research & Therapy (2023).
2. 3D mouse pose from single-view video and a new dataset. Scientific Reports (2023).
3. The Open Source GAITOR Suite for Rodent Gait Analysis. Scientific Reports (2018).
4. Comparison of a manual walking platform and the CatWalk gait analysis system in a rat osteoarthritis model.. Advances in Clinical and Experimental Medicine (2021).