Abstract
Muscle weakness plays an important role in neuromuscular disorders comprising amyotrophic lateral sclerosis (ALS). However, it is not established whether muscle denervation originates from the motor neurons, the muscles or more likely both. Previous studies have shown that the expression of the SOD1G93A mutation in skeletal muscles causes denervation of the neuromuscular junctions, inability to regenerate and consequent atrophy, all clear symptoms of ALS. In this work, we used SOD1G93A mice, a model that best mimics some pathological features of both familial and sporadic ALS, and we investigated some biological effects induced by the activation of the P2X7 receptor in the skeletal muscles. The P2X7, belonging to the ionotropic family of purinergic receptors for extracellular ATP, is abundantly expressed in the healthy skeletal muscles, where it controls cell duplication, differentiation, regeneration or death. In particular, we evaluated whether an in vivo treatment in SOD1G93A mice with the P2X7 specific agonist 2′(3′)-O-(4-Benzoylbenzoyl) adenosine5′-triphosphate (BzATP) just before the onset of a pathological neuromuscular phenotype could exert beneficial effects in the skeletal muscles. Our findings indicate that stimulation of P2X7 improves the innervation and metabolism of myofibers, moreover elicits the proliferation/differentiation of satellite cells, thus preventing the denervation atrophy of skeletal muscles in SOD1G93A mice. Overall, this study suggests that a P2X7-targeted and site-specific modulation might be a strategy to interfere with the complex multifactorial and multisystem nature of ALS.
| Original language | English |
|---|---|
| Journal | Brain Pathology |
| DOIs | |
| Publication status | Published - Jan 1 2019 |
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Keywords
- amyotrophic lateral sclerosis
- purinergic receptors
- skeletal muscle
- SOD1G93A mice
ASJC Scopus subject areas
- Neuroscience(all)
- Pathology and Forensic Medicine
- Clinical Neurology
Cite this
P2X7 activation enhances skeletal muscle metabolism and regeneration in SOD1G93A mouse model of amyotrophic lateral sclerosis. / Fabbrizio, Paola; Apolloni, Savina; Bianchi, Andrea; Salvatori, Illari; Valle, Cristiana; Lanzuolo, Chiara; Bendotti, Caterina; Nardo, Giovanni; Volonté, Cinzia.
In: Brain Pathology, 01.01.2019.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - P2X7 activation enhances skeletal muscle metabolism and regeneration in SOD1G93A mouse model of amyotrophic lateral sclerosis
AU - Fabbrizio, Paola
AU - Apolloni, Savina
AU - Bianchi, Andrea
AU - Salvatori, Illari
AU - Valle, Cristiana
AU - Lanzuolo, Chiara
AU - Bendotti, Caterina
AU - Nardo, Giovanni
AU - Volonté, Cinzia
PY - 2019/1/1
Y1 - 2019/1/1
N2 - Muscle weakness plays an important role in neuromuscular disorders comprising amyotrophic lateral sclerosis (ALS). However, it is not established whether muscle denervation originates from the motor neurons, the muscles or more likely both. Previous studies have shown that the expression of the SOD1G93A mutation in skeletal muscles causes denervation of the neuromuscular junctions, inability to regenerate and consequent atrophy, all clear symptoms of ALS. In this work, we used SOD1G93A mice, a model that best mimics some pathological features of both familial and sporadic ALS, and we investigated some biological effects induced by the activation of the P2X7 receptor in the skeletal muscles. The P2X7, belonging to the ionotropic family of purinergic receptors for extracellular ATP, is abundantly expressed in the healthy skeletal muscles, where it controls cell duplication, differentiation, regeneration or death. In particular, we evaluated whether an in vivo treatment in SOD1G93A mice with the P2X7 specific agonist 2′(3′)-O-(4-Benzoylbenzoyl) adenosine5′-triphosphate (BzATP) just before the onset of a pathological neuromuscular phenotype could exert beneficial effects in the skeletal muscles. Our findings indicate that stimulation of P2X7 improves the innervation and metabolism of myofibers, moreover elicits the proliferation/differentiation of satellite cells, thus preventing the denervation atrophy of skeletal muscles in SOD1G93A mice. Overall, this study suggests that a P2X7-targeted and site-specific modulation might be a strategy to interfere with the complex multifactorial and multisystem nature of ALS.
AB - Muscle weakness plays an important role in neuromuscular disorders comprising amyotrophic lateral sclerosis (ALS). However, it is not established whether muscle denervation originates from the motor neurons, the muscles or more likely both. Previous studies have shown that the expression of the SOD1G93A mutation in skeletal muscles causes denervation of the neuromuscular junctions, inability to regenerate and consequent atrophy, all clear symptoms of ALS. In this work, we used SOD1G93A mice, a model that best mimics some pathological features of both familial and sporadic ALS, and we investigated some biological effects induced by the activation of the P2X7 receptor in the skeletal muscles. The P2X7, belonging to the ionotropic family of purinergic receptors for extracellular ATP, is abundantly expressed in the healthy skeletal muscles, where it controls cell duplication, differentiation, regeneration or death. In particular, we evaluated whether an in vivo treatment in SOD1G93A mice with the P2X7 specific agonist 2′(3′)-O-(4-Benzoylbenzoyl) adenosine5′-triphosphate (BzATP) just before the onset of a pathological neuromuscular phenotype could exert beneficial effects in the skeletal muscles. Our findings indicate that stimulation of P2X7 improves the innervation and metabolism of myofibers, moreover elicits the proliferation/differentiation of satellite cells, thus preventing the denervation atrophy of skeletal muscles in SOD1G93A mice. Overall, this study suggests that a P2X7-targeted and site-specific modulation might be a strategy to interfere with the complex multifactorial and multisystem nature of ALS.
KW - amyotrophic lateral sclerosis
KW - purinergic receptors
KW - skeletal muscle
KW - SOD1G93A mice
UR - http://www.scopus.com/inward/record.url?scp=85070816643&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85070816643&partnerID=8YFLogxK
U2 - 10.1111/bpa.12774
DO - 10.1111/bpa.12774
M3 - Article
AN - SCOPUS:85070816643
JO - Brain Pathology
JF - Brain Pathology
SN - 1015-6305
ER -