Quadriceps Muscle Atrophy After Anterior Cruciate Ligament Transection Involves Increased mRNA Levels of Atrogin-1, Muscle Ring Finger 1, and Myostatin

Quadriceps Muscle Atrophy After Anterior Cruciate Ligament Transection Involves Increased mRNA Levels of Atrogin-1, Muscle Ring Finger 1, and Myostatin

Author Delfino, Gabriel B. Google Scholar
Peviani, Sabrina M. Google Scholar
Durigan, Joao L. Q. Google Scholar
Russo, Thiago L. Google Scholar
Baptista, Igor L. Google Scholar
Ferretti, Mario Autor UNIFESP Google Scholar
Moriscot, Anselmo S. Google Scholar
Salvini, Tania F. Google Scholar
Institution Universidade Federal de São Carlos (UFSCar)
Universidade de São Paulo (USP)
Universidade Federal de São Paulo (UNIFESP)
Abstract Delfino GB, Peviani SM, Durigan JLQ, Russo TL, Baptista IL, Ferretti M, Moriscot AS, Salvini TF: Quadriceps muscle atrophy after anterior cruciate ligament transection involves increased mRNA levels of atrogin-1, muscle ring finger 1, and myostatin. Am J Phys Med Rehabil 2013;92:411-419. Objective: the aim of this study was to assess the mRNA levels of atrogin-1, muscle ring finger 1, and myostatin in rat quadriceps after anterior cruciate ligament (ACL) transection.Design: Wistar rats were randomized into three different groups: ACL (surgery and ACL transection), sham (surgery without ACL transection), and control. Vastus medialis, rectus femoris, and vastus lateralis muscles were harvested at 1, 2, 3, 7, and 15 days after ACL transection. the mRNA levels of atrogin-1, muscle ring finger 1, and myostatin, as well as the ubiquitinated protein content, muscle mass, and cross-sectional area of the muscle fibers, were evaluated.Results: Elevated levels of atrogin-1, muscle ring finger 1, and myostatin mRNA were detected in all tested muscles at most time points. the ubiquitinated protein content was increased at 3 days in the ACL and sham groups. the muscle mass of the ACL group was reduced at 3, 7, and 15 days (vastus lateralis and vastus medialis) and at 7 and 15 days (rectus femoris), whereas it was reduced in the sham group at 3 and 7 days (vastus lateralis and vastus medialis) and at 7 days (rectus femoris). the cross-sectional area of vastus medialis was reduced at 3, 7, and 15 days in the ACL group and at 3 and 7 days in the sham group. the cross-sectional area of the vastus lateralis was reduced at 7 and 15 days in the ACL group and at 7 days in the sham group. Whereas muscle mass and cross-sectional area recovery was noted in the sham group, no recovery was observed in the ACL group.Conclusions: Quadriceps atrophy after ACL transection involves increased levels of myostatin, atrogin-1, and muscle ring finger 1 mRNA and the accumulation of ubiquitinated protein.
Keywords Ubiquitin Protein Ligases
Knee Injury
Sports Medicine
Physical Medicine
Language English
Sponsor Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Grant number FAPESP: 2010/06940-7
FAPESP: 08/03499-8
FAPESP: 07/57613-3
FAPESP: 08/09408-4
Date 2013-05-01
Published in American Journal of Physical Medicine & Rehabilitation. Philadelphia: Lippincott Williams & Wilkins, v. 92, n. 5, p. 411-419, 2013.
ISSN 0894-9115 (Sherpa/Romeo, impact factor)
Publisher Lippincott Williams & Wilkins
Extent 411-419
Origin http://dx.doi.org/10.1097/PHM.0b013e3182643f82
Access rights Closed access
Type Article
Web of Science ID WOS:000317919600005
URI http://repositorio.unifesp.br/handle/11600/36320

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