Muscle atrophy after total knee arthroplasty (TKA) occurs at a rate of 1% per day for the first 2 wk. Our hypothesis is that tourniquet-induced ischemia-reperfusion injury occurring during TKA influences metabolism and may contribute to atrophy. Identifying pathways that are upregulated during this critical "14-d window" after surgery may help us delineate therapeutic approaches to avoid muscle loss.
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http://dx.doi.org/10.1249/JES.0000000000000076 | DOI Listing |
J Orthop Surg Res
January 2025
Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, 300072, China.
Background: Knee Osteoarthritis (KOA) is a prevalent condition worldwide, significantly diminishing quality of life and productivity. Except for the alignment change, muscle activation patterns (MAP) have garnered increasing attention as another crucial factor contributing to KOA.
Objective: This study explores the factors, characteristics, and effects of MAP changes caused by KOA, providing a neuromuscular-based causal analysis for the rehabilitation treatment of KOA.
J Appl Physiol (1985)
January 2025
Department Physical Therapy.
The purpose of this study was to investigate the ability of mechanotherapy to enhance recovery or prevent loss of muscle size with atrophy, in female rats. Female F344/BN rats were assigned to weight bearing (WB), hindlimb suspended (HS) for 14 days with reambulation for 7 days without (RA) or with (RAM) mechanotherapy (study 1), or to WB, HS for 7 days, with (HSM) or without mechanotherapy (study 2) to gastrocnemius. Muscle fiber cross sectional area (CSA) and type, collagen, satellite cell number, and protein synthesis (K) and degradation (K) were assessed.
View Article and Find Full Text PDFBiochem Biophys Res Commun
January 2025
Section of Neuromedical Science, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan.
Motor dysfunction in various diseases and aging is often accompanied by skeletal muscle atrophy and reduced axonal projections from motor neurons to the skeletal muscles. While several studies have investigated the correlations and molecular mechanisms between muscle atrophy and motor neuron denervation to explain the pathology of motor diseases, it remains unclear whether skeletal muscle atrophy directly causes axonal denervation of motor neurons. Here, we used a casts-attached mouse model which represents muscle atrophy and motor dysfunction in the hindlimbs to explore how skeletal muscle atrophy affects motor neuronal axon projections.
View Article and Find Full Text PDFFront Bioinform
January 2025
Department of Biology and Chemistry, College of Sciences, National University of Defense Technology, Changsha, Hunan, China.
The precise role of lncRNAs in skeletal muscle development and atrophy remain elusive. We conducted a bioinformatic analysis of 26 GEO datasets from mouse studies, encompassing embryonic development, postnatal growth, regeneration, cell proliferation, and differentiation, using R and relevant packages (limma et al.).
View Article and Find Full Text PDFFront Public Health
January 2025
Department of Geriatrics, The Third People's Hospital of Yunnan Province, Kunming, Yunnan, China.
Background: Sarcopenia, sarcopenic obesity, and hypertension are all widespread public health problems in middle-aged and older populations, and their association is controversial. The purpose of this study is to analyze the relationship between obesity, sarcopenia, and sarcopenic obesity with hypertension in a middle-aged and older community population in China through a large-scale longitudinal design.
Methods: In this cohort study with 7 years of follow-up, the study population was drawn from participants in the China Health and Retirement Longitudinal Study (CHARLS) in 2011 and followed up in 2013, 2015, and 2018.
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