The effects of short-term non-weightbearing and immobilization after anterior cruciate ligament reconstruction on articular cartilage: Long-term observation after reloading and remobilization.

Non-weightbearing or immobilization after anterior cruciate ligament (ACL) reconstruction accelerates cartilage degeneration. However, it is unclear whether these adverse effects are reversed by reloading or remobilization. Moreover, it is unknown whether the combination of non-weightbearing and immobilization after ACL reconstruction has synergistic effects on cartilage degeneration.

Three-dimensional analysis of locomotion patterns after hindlimb suspension and subsequent long-term reloading in growing rats.

The long-term effects of insufficient weight loading during growth on locomotion patterns are not fully understood. The purpose of this study was to determine 1) the effects of hindlimb suspension (HS) in skeletally immature rats on locomotion patterns using a treadmill and a three-dimensional (3D) motion analysis system, and 2) the relationships between locomotion patterns and femoral morphologies, which were reconstructed from 3D computed tomography images taken at 54 weeks old. Four-week-old female rats were subjected to HS four or eight weeks, followed by reloading for until reaching up to 54 weeks old.

Histological changes in skeletal muscle induced by heart failure in human patients and animal models: A scoping review.

Objective: This scoping review aimed to characterize the histological changes in skeletal muscle after heart failure (HF) and to identify gaps in knowledge.

Methods: On April 03, 2024, systematic searches were performed for papers in which histological analyses were conducted on skeletal muscle sampled from patients with HF or animal models of HF. Screening and data extraction were conducted by two independent authors.

Does the timing of anterior cruciate ligament reconstruction surgery affect flexion contracture formation in rats?

Background: Anterior cruciate ligament injuries are commonly treated with ligament reconstruction surgery, but post-operative joint contracture is a major complication. The optimal timing for anterior cruciate ligament reconstruction remains controversial, with some clinical studies suggesting that early surgery may increase the risk of joint contractures, while others have found no such association. To clarify this, we investigated the effects of the timing of reconstruction surgery on contracture formation using a rat model.

Effects of Hindlimb Suspension on the Development of Hip Bone Morphologies in Growing Rats.

Abnormal hip bone morphologies are associated with various diseases of the hip joint. Weight bearing, especially during growth, may be important to achieve normal acetabulum development. This study aimed to investigate whether hip bone morphologies were affected by hindlimb suspension (HS) in 4 week-old rats.