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Effect of acute exercise on patella tendon protein synthesis and gene expression

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Evidence suggests that habitual loading can result in patellar tendon hypertrophy, especially at the proximal and distal parts of the patellar tendon. The underlying protein kinetic changes and its regulation remains controversial and human data, investigating this topic, are limited. The present study investigated how acute exercise affects growth factor production and collagen fractional synthetic rate in patellar tendon tissue from patients undergoing an anterior cruciate ligament reconstruction operation. The operation was performed by use of the bone-patellar tendon-bone method under spinal anesthesia. Twelve subjects were randomized to one of two groups: a control group or an exercise group (1-hr unilateral knee-extension 67% of Wmax 24 hours before operation). Two hours before the anterior cruciate ligament operation a flooding-dose of L-[1-(13)C]proline was given. Tissue from the most proximal part of the patellar tendon was obtained during the operation. Tendon collagen fractional synthetic rate and mRNA concentrations of TGF-β-1, CTGF, and type I and III collagen were measured. CTGF and type I collagen expression were higher in the exercise group compared to the control group (p
OriginalsprogEngelsk
TidsskriftSpringerPlus
Vol/bind2
Udgave nummer1
Sider (fra-til)109
ISSN2193-1801
DOI
StatusUdgivet - dec. 2013

ID: 42220158