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The Effects of Low-Intensity Pulsed Ultrasound and Nanomagnet Applications on the Expressions of MMP-13 and MAPKs in Rabbit Knee Osteoarthritis

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An animal model of Osteoarthritis (OA) was established to observe the influences of low-intensity pulsed ultrasound (LIPUS) and nano magnet application (NMA) on Collagenase 3 (MMP-13) expression and the activation status of mitogen activated protein kinases (MAPKs) in rabbit. 24 experimental rabbits from New Zealand were randomly divided into four groups: LIPUS, NMA, LIPUS+NMA group, and control group. The experimental rabbit OA model was established in the right knee joint of rabbits received ACLT operation. Rabbits in LIPUS group received LIPUS treatment and rabbits in NMA group were given NMA treatment. In LIPUS+NMA group, both treatments were applied on experimental rabbits everyday. However, the rabbits in control group only underwent ACLT operation. Four weeks later all rabbits were killed and changes of histopathology in rabbit articular cartilage were assessed and evaluated using Mankin method (Modified Mankin Scale). The protein expressions of MMP-13 and MAPKs were estimated using Western Blot. The results showed that both LIPUS and NMA treatments could significantly decrease the Mankin scores and suppress the expression level of MMP-13. However, there were some inverse results of MAPKs expression in these two applications and imply their treatment mechanisms of OA were different from each other.
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Document Type: Research Article

Publication date: January 1, 2013

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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