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

Autor(es)

Delfino, Gabriel B. ^[1] ; Peviani, Sabrina M. ^[1] ; Durigan, Joao L. Q. ^[1] ; Russo, Thiago L. ^[1] ; Baptista, Igor L. ^[2] ; Ferretti, Mario ^[3] ; Moriscot, Anselmo S. ^[2] ; Salvini, Tania F. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Phys Therapy, BR-13565905 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Inst Biomed Sci, Dept Cell & Dev Biol, Sao Paulo - Brazil

^[3] Univ Fed Sao Paulo, Dept Orthoaped Surg, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: AMERICAN JOURNAL OF PHYSICAL MEDICINE & REHABILITATION; v. 92, n. 5, p. 411-419, MAY 2013.
• Citações Web of Science: 12

Resumo

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. (AU)

• Processo FAPESP: 08/09408-4 - Efeito da eletroestimulação sobre a atrofia no músculo quadríceps femoral após ruptura do ligamento cruzado anterior em ratos
• Beneficiário: João Luiz Quagliotti Durigan
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 07/57613-3 - Efeitos celulares e moleculares da sobrecarga de leucina na atrofia muscular induzida pelo desuso
• Beneficiário: Igor Luchini Baptista
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 08/03499-8 - Efeito da ruptura do ligamento cruzado anterior sobre a morfologia, expressão de genes e proteínas associados à atrofia no músculo quadríceps femoral de ratos
• Beneficiário: Gabriel Borges Delfino
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 10/06940-7 - Efeito da ruptura do ligamento cruzado anterior sobre a expressão de genes e proteínas relacionadas à atrofia no músculo quadríceps de ratos
• Beneficiário: Tania de Fatima Salvini
• Modalidade de apoio: Auxílio à Pesquisa - Regular