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In JoVE (1)
Other Publications (1)
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Articles by Giovanna Distefano in JoVE
דגם Murine של אימון שרירים באמצעות גירוי חשמלי neuromuscular
Fabrisia Ambrosio1,2,3, G. Kelley Fitzgerald2, Ricardo Ferrari1,2, Giovanna Distefano1,2, George Carvell2
1Department of Physical Medicine and Rehabilitation, University of Pittsburgh, 2Department of Physical Therapy, University of Pittsburgh, 3McGowan Institute for Regenerative Medicine, University of Pittsburgh
מודל murine של גירוי חשמלי neuromuscular (NMES), שיטת קליני בטוח ולא יקר, אל השרירים תא הקדמי מתואר. מודל זה יש את היתרון של שינוי התקן קליני זמינים לצורך לעורר התכווצויות שרירים ממוקד וספציפי בעכברים.
Other articles by Giovanna Distefano on PubMed
The Synergistic Effect of Treadmill Running on Stem-cell Transplantation to Heal Injured Skeletal Muscle
Tissue Engineering. Part A. Mar, 2010 | Pubmed ID: 19788347
Muscle-derived stem-cell (MDSC) transplantation presents a promising method for the treatment of muscle injuries. This study investigated the ability of exercise to enhance MDSC transplantation into the injured muscle. Mice were divided into four groups: contusion + phosphate-buffered saline (C + PBS; n = 14 muscles), C + MDSC transplantation (n = 12 muscles), C + PBS + treadmill running (C + PBS + TM; n = 17 muscles), and C + MDSC + TM (n = 13 muscles). One day after injury, the TM groups began running for 1 or 5 weeks. Two days after injury, muscles of C + MDSC and C + MDSC + TM groups were injected with MDSCs. One or 5 weeks later, the number and differentiation of transplanted MDSCs, myofiber regeneration, collagen I formation, and vascularity were assessed histologically. In vitro, MDSCs were subjected to mechanical stimulation, and growth kinetics were quantified. In vitro, mechanical stimulation decreased the MDSC population doubling time (18.6 +/- 1.6 h) and cell division time (10.9 +/- 0.7 h), compared with the controls (population doubling time: 23.0 +/- 3.4 h; cell division time: 13.3 +/- 1.1 h) (p = 0.01 and 0.03, respectively). In vivo, 5 weeks of TM increased the myogenic contribution of transplanted MDSCs, compared with the controls (p = 0.02). C + MDSC, C + PBS + TM, and C + MDSC + TM demonstrated decreased fibrosis at 5 weeks, compared with the C + PBS controls (p = 0.00, p = 0.03, and p = 0.02, respectively). Results suggest that the mechanical stimulation favors MDSC proliferation, both in vitro and in vivo, and that exercise enhances MDSC transplantation after injury.