PUBLICATION
Atrogin-1 promotes muscle homeostasis by regulating levels of endoplasmic reticulum chaperone BiP
- Authors
- Ruparelia, A.A., Montandon, M., Merriner, J., Huang, C., Wong, S.F.L., Sonntag, C., Hardee, J.P., Lynch, G.S., Miles, L.B., Siegel, A., Hall, T.E., Schittenhelm, R.B., Currie, P.D.
- ID
- ZDB-PUB-240327-1
- Date
- 2024
- Source
- JCI insight 9(8): (Journal)
- Registered Authors
- Currie, Peter D., Hall, Thomas, Merriner, Jo, Miles, Lee, Montandon, Margo, Ruparelia, Avnika, Siegel, Ashley, Sonntag, Carmen
- Keywords
- Genetic diseases, Muscle, Muscle biology, Ubiquitin-proteosome system
- MeSH Terms
-
- Animals
- Disease Models, Animal*
- Endoplasmic Reticulum/metabolism
- Endoplasmic Reticulum Chaperone BiP*/metabolism
- Heat-Shock Proteins/genetics
- Heat-Shock Proteins/metabolism
- Homeostasis*
- Humans
- Mitochondrial Dynamics
- Muscle Proteins*/genetics
- Muscle Proteins*/metabolism
- Muscle, Skeletal*/metabolism
- Muscle, Skeletal*/pathology
- Muscular Dystrophy, Duchenne*/genetics
- Muscular Dystrophy, Duchenne*/metabolism
- Muscular Dystrophy, Duchenne*/pathology
- SKP Cullin F-Box Protein Ligases*/genetics
- SKP Cullin F-Box Protein Ligases*/metabolism
- Zebrafish*
- Zebrafish Proteins/genetics
- Zebrafish Proteins/metabolism
- PubMed
- 38530354 Full text @ JCI Insight
Citation
Ruparelia, A.A., Montandon, M., Merriner, J., Huang, C., Wong, S.F.L., Sonntag, C., Hardee, J.P., Lynch, G.S., Miles, L.B., Siegel, A., Hall, T.E., Schittenhelm, R.B., Currie, P.D. (2024) Atrogin-1 promotes muscle homeostasis by regulating levels of endoplasmic reticulum chaperone BiP. JCI insight. 9(8):.
Abstract
Skeletal muscle wasting results from numerous pathological conditions impacting both the musculoskeletal and nervous systems. A unifying feature of these pathologies is the upregulation of members of the E3 ubiquitin ligase family, resulting in increased proteolytic degradation of target proteins. Despite the critical role E3 ubiquitin ligases in regulating muscle mass, the specific proteins they target for degradation and the mechanisms by which they regulate skeletal muscle homeostasis remain ill-defined. Here, using zebrafish loss of function models combined with in vivo cell biology and proteomic approaches, we reveal a role of atrogin-1 in regulating the levels of the endoplasmic reticulum chaperone BiP. Loss of atrogin-1 results in an accumulation of BiP, leading to impaired mitochondrial dynamics and a subsequent loss in muscle fibre integrity. We further implicate a disruption in atrogin-1 mediated BiP regulation in the pathogenesis of Duchenne muscular dystrophy. We reveal that BiP is not only upregulated in Duchenne muscular dystrophy, but its inhibition using pharmacological strategies, or by upregulating atrogin-1, significantly ameliorates pathology in a zebrafish model of Duchenne muscular dystrophy. Collectively, our data implicates atrogin-1 and BiP in the pathogenesis of Duchenne muscular dystrophy, and highlights atrogin-1's essential role in maintaining muscle homeostasis.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping