Mitigating sarcoplasmic reticulum stress limits disuse-induced muscle loss in hindlimb unloaded mice.
Journal
NPJ microgravity
ISSN: 2373-8065
Titre abrégé: NPJ Microgravity
Pays: United States
ID NLM: 101703605
Informations de publication
Date de publication:
11 Jul 2022
11 Jul 2022
Historique:
received:
04
01
2022
accepted:
22
06
2022
entrez:
11
7
2022
pubmed:
12
7
2022
medline:
12
7
2022
Statut:
epublish
Résumé
Muscle disuse in the hindlimb unloaded (HU) mice causes significant atrophy and weakness. However, the cellular and molecular mechanisms driving disuse-muscle atrophy remain elusive. We investigated the potential contribution of proteins dysregulation by sarcoplasmic reticulum (SR), a condition called SR stress, to muscle loss during HU. Male, c57BL/6j mice were assigned to ground-based controls or HU groups treated with vehicle or 4-phenylbutyrate (4-PBA), a potent inhibitor of SR stress, once a day for three weeks. We report that the 4-PBA reduced the SR stress and partly reversed the muscle atrophy and weakness in the HU mice. Transcriptome analysis revealed that several genes were switched on (n = 3688) or differentially expressed (n = 1184) due to HU. GO, and KEGG term analysis revealed alterations in pathways associated with the assembly of cilia and microtubules, extracellular matrix proteins regulation, calcium homeostasis, and immune modulation during HU. The muscle restoration with 4-PBA partly reversed these changes along with differential and unique expression of several genes. The analysis of genes among the two comparisons (HU-v vs. control and HU-t vs. HU-v.) shows 841 genes were overlapped between the two comparisons and they may be regulated by 4-PBA. Altogether, our findings suggest that the pharmacological suppression of SR stress may be an effective strategy to prevent disuse-induced muscle weakness and atrophy.
Identifiants
pubmed: 35817772
doi: 10.1038/s41526-022-00211-w
pii: 10.1038/s41526-022-00211-w
pmc: PMC9273600
doi:
Types de publication
Journal Article
Langues
eng
Pagination
24Informations de copyright
© 2022. The Author(s).
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