Abstract:
:Facioscapulohumeral muscular dystrophy (FSHD) is the third most frequent inherited myopathy. We previously demonstrated that mesoangioblasts can be efficiently isolated from FSHD muscles, although their differentiation ability into skeletal muscle was variably impaired. This correlates with overall disease severity and degree of histopathologic abnormalities, since mesoangioblasts from morphologically normal muscles did not show any myogenic differentiation block. The aim of our present study was to verify whether mesoangioblasts from differentially affected FSHD muscles reproduce in vivo the same differentiation ability shown in vitro by studying their capability to form new muscle fibers during muscle regeneration of experimentally damaged muscles. We show that a diverse ability of FSHD mesoangioblasts to engraft and differentiate into skeletal muscle of SCID mice is strictly related to the characteristics of the muscle of origin, closely replicating in vivo what was previously observed in vitro. Moreover, we demonstrate that mesoangioblasts obtained from severely affected muscles scarcely integrate into muscle fibers, remaining mainly localized in the connective tissue. This suggests a defective migration in response to chemoattractants released by damaged fibers, as indicated by cell migration assays in response to HMGB1 and very low levels of RAGE expression, along with a decreased ability to fuse or to appropriately trigger the myogenic program. Our study indicates that FSHD mesoangioblasts from unaffected muscles can be used as selective treatment to halt muscle degeneration in severely affected muscles, and suggests that pharmacological and molecular interventions aimed to ameliorate homing and engraftment of transplanted autologous mesoangioblasts may open the way to cell therapy for FSHD patients, without requiring immunosuppression or genetic correction in vitro.
journal_name
Cell Transplantjournal_title
Cell transplantationauthors
Morosetti R,Gidaro T,Broccolini A,Gliubizzi C,Sancricca C,Tonali PA,Ricci E,Mirabella Mdoi
10.3727/096368910X546571subject
Has Abstractpub_date
2011-01-01 00:00:00pages
1299-313issue
8eissn
0963-6897issn
1555-3892pii
ct0157morosettijournal_volume
20pub_type
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