Molecular Fingerprint of BMD Patients Lacking a Portion in the Rod Domain of Dystrophin

International Journal of Molecular Sciences

Isabella Moroni¹  Pietro Barbacini²  Daniele Capitanio²  Cecilia Gelfi²  Manuela Moriggi³  Enrica Torretta⁴  Flavia Blasevich⁵  Lucia Morandi⁵  Marina Mora⁵ 

[1] Child Neurology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, 20133 Milan, Italy;Department of Biomedical Sciences for Health, University of Milan, 20054 Segrate, Italy;Gastroenterology and Digestive Endoscopy Unit, IRCCS Policlinico San Donato, 20097 Milan, Italy;IRCCS Istituto Ortopedico Galeazzi, 20161 Milan, Italy;Neuromuscular Diseases and Neuroimmunology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, 20133 Milan, Italy;

关键词: muscle dystrophy;    sarcopenia;    muscle regeneration;    muscle–bone interaction;    LC-ESI-MS/MS;    2-D DIGE;   

DOI  :  10.3390/ijms23052624

来源: DOAJ

【 摘 要 】

BMD is characterized by a marked heterogeneity of gene mutations resulting in many abnormal dystrophin proteins with different expression and residual functions. The smaller dystrophin molecules lacking a portion around exon 48 of the rod domain, named the D8 region, are related to milder phenotypes. The study aimed to determine which proteins might contribute to preserving muscle function in these patients. Patients were subdivided, based on the absence or presence of deletions in the D8 region, into two groups, BMD1 and BMD2. Muscle extracts were analyzed by 2-D DIGE, label-free LC-ESI-MS/MS, and Ingenuity pathway analysis (IPA). Increased levels of proteins typical of fast fibers and of proteins involved in the sarcomere reorganization characterize BMD2. IPA of proteomics datasets indicated in BMD2 prevalence of glycolysis and gluconeogenesis and a correct flux through the TCA cycle enabling them to maintain both metabolism and epithelial adherens junction. A 2-D DIGE analysis revealed an increase of acetylated proteoforms of moonlighting proteins aldolase, enolase, and glyceraldehyde-3-phosphate dehydrogenase that can target the nucleus promoting stem cell recruitment and muscle regeneration. In BMD2, immunoblotting indicated higher levels of myogenin and lower levels of PAX7 and SIRT1/2 associated with a set of proteins identified by proteomics as involved in muscle homeostasis maintenance.

【 授权许可】

Unknown