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2015 ; 3
(ä): 65
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Lack of robust satellite cell activation and muscle regeneration during the
progression of Pompe disease
#MMPMID26510925
Schaaf GJ
; van Gestel TJ
; Brusse E
; Verdijk RM
; de Coo IF
; van Doorn PA
; van der Ploeg AT
; Pijnappel WW
Acta Neuropathol Commun
2015[Oct]; 3
(ä): 65
PMID26510925
show ga
INTRODUCTION: Muscle stem cells termed satellite cells are essential for muscle
regeneration. A central question in many neuromuscular disorders is why satellite
cells are unable to prevent progressive muscle wasting. We have analyzed muscle
fiber pathology and the satellite cell response in Pompe disease, a metabolic
myopathy caused by acid alpha-glucosidase deficiency and lysosomal glycogen
accumulation. Pathology included muscle fiber vacuolization, loss of cross
striation, and immune cell infiltration. RESULTS: The total number of
Pax7-positive satellite cells in muscle biopsies from infantile, childhood onset
and adult patients (with different ages and disease severities) were
indistinguishable from controls, indicating that the satellite cell pool is not
exhausted in Pompe disease. Pax7/Ki67 double stainings showed low levels of
satellite cell proliferation similar to controls, while MyoD and Myogenin
stainings showed undetectable satellite cell differentiation. Muscle regenerative
activity monitored with expression of embryonic Myosin Heavy Chain was weak in
the rapidly progressing classic infantile form and undetectable in the more
slowly progressive childhood and adult onset disease including in severely
affected patients. CONCLUSIONS: These results imply that ongoing muscle wasting
in Pompe disease may be explained by insufficient satellite cell activation and
muscle regeneration. The preservation of the satellite cell pool may offer a
venue for the development of novel treatment strategies directed towards the
activation of endogenous satellite cells.
|Adolescent
[MESH]
|Adult
[MESH]
|Age of Onset
[MESH]
|Antigens, CD/metabolism
[MESH]
|Case-Control Studies
[MESH]
|Child
[MESH]
|Child, Preschool
[MESH]
|Disease Progression
[MESH]
|Female
[MESH]
|Glycogen Storage Disease Type II/*pathology/*physiopathology
[MESH]