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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Defective autophagy and increased apoptosis contribute toward the pathogenesis of FKRP-associated muscular dystrophies

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Autor(es):
Ortiz-Cordero, Carolina [1, 2] ; Bincoletto, Claudia [1, 3] ; Dhoke, Neha R. [1] ; Selvaraj, Sridhar [1] ; Magli, Alessandro [1] ; Zhou, Haowen [4] ; Kim, Do-Hyung [5] ; Bang, Anne G. [4] ; Perlingeiro, Rita C. R. [1, 2]
Número total de Autores: 9
Afiliação do(s) autor(es):
[1] Univ Minnesota, Lillehei Heart Inst, Dept Med, 4-128 CCRB, 2231 6th St SE, Minneapolis, MN 55455 - USA
[2] Univ Minnesota, Dept Integrat Biol & Physiol, Minneapolis, MN 55455 - USA
[3] Univ Fed Sao Paulo UNIFESP, Dept Farmacol, Escola Paulista Med EPM, Sao Paulo - Brazil
[4] Sanford Burnham Prebys Med Discovery Inst, Conrad Prebys Ctr Chem Genom, La Jolla, CA - USA
[5] Univ Minnesota, Dept Biochem Mol Biol & Biophys, Minneapolis, MN - USA
Número total de Afiliações: 5
Tipo de documento: Artigo Científico
Fonte: STEM CELL REPORTS; v. 16, n. 11, p. 2752-2767, NOV 9 2021.
Citações Web of Science: 1
Resumo

Fukutin-related protein (FKRP) is a glycosyltransferase involved in glycosylation of alpha-dystroglycan (cc-DG). Mutations in FKRP are associated with muscular dystrophies (MD) ranging from limb-girdle LGMDR9 to Walker-Warburg Syndrome (WWS), a severe type of congenital MD. Although hypoglycosylation of cc-DG is the main hallmark of this group of diseases, a full understanding of the underlying pathophysiology is still missing. Here, we investigated molecular mechanisms impaired by FKRP mutations in pluripotent stem (PS) cell-derived myotubes. FKRP-deficient myotubes show transcriptome alterations in genes involved in extracellular matrix receptor interactions, calcium signaling, PI3K-Akt pathway, and lysosomal function. Accordingly, using a panel of patient-specific LGMDR9 and WWS induced PS cell-derived myotubes, we found a significant reduction in the autophagy-lysosome pathway for both disease phenotypes. In addition, we show that WWS myotubes display decreased ERK1/2 activity and increased apoptosis, which were restored in gene edited myotubes. Our results suggest the autophagy-lysosome pathway and apoptosis may contribute to the FKRP-associated MD pathogenesis. (AU)

Processo FAPESP: 18/07633-2 - Células tronco-pluripotentes induzidas (IPS) como ferramenta de estudos em farmacologia/toxicologia: um papel potencial da autofagia na sarcopenia
Beneficiário:Claudia Bincoletto Trindade
Linha de fomento: Bolsas no Exterior - Pesquisa