Failure to up-regulate transcription of genes necessary for muscle adaptation underlies limb girdle muscular dystrophy 2A (calpainopathy)

Irina Kramerova, Natalia Ermolova, Ascia Eskin, Andrea Hevener, Oswald Quehenberger, Aaron M. Armando, Ronald Haller, Nadine Romain, Stanley F. Nelson, Melissa J. Spencer

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Limb girdle muscular dystrophy 2A is due to loss-of-function mutations in the Calpain 3 (CAPN3) gene. Our previous data suggest that CAPN3 helps to maintain the integrity of the triad complex in skeletal muscle. In Capn3 knock-out mice (C3KO), Ca2+release and Ca2+/calmodulin kinase II (CaMKII) signaling are attenuated. We hypothesized that calpainopathy may result from a failure to transmit loading-induced Ca2+-mediated signals, necessary to up-regulate expression of muscle adaptation genes. To test this hypothesis, we compared transcriptomes of muscles from wild type (WT) and C3KO mice subjected to endurance exercise. In WT mice, exercise induces a gene signature that includes myofibrillar, mitochondrial and oxidative lipid metabolismgenes, necessary for muscle adaptation. C3KO muscles fail to activate the same gene signature. Furthermore, in agreement with the aberrant transcriptional profile, we observe a commensurate functional defect in lipid metabolism whereby C3KO muscles fail to release fatty acids from stored triacylglycerol. In conjunction with the defects in oxidative metabolism, C3KO mice demonstrate reduced exercise endurance. Failure to up-regulate genes in C3KO muscles is due, in part, to decreased levels of PGC1a, a transcriptional co-regulator that orchestrates the muscle adaptation response. Destabilization of PGC1a is attributable to decreased p38 MAPK activation via diminished CaMKII signaling. Thus, we elucidate a pathway downstreamof Ca2+-mediated CaMKII activation that is dysfunctional in C3KO mice, leading to reduced transcription of genes involved in muscle adaptation. These studies identify a novel mechanism of muscular dystrophy: a blunted transcriptional response to muscle loading resulting in chronic failure to adapt and remodel.

Original languageEnglish (US)
Pages (from-to)2194-2207
Number of pages14
JournalHuman Molecular Genetics
Volume25
Issue number11
DOIs
StatePublished - Jun 1 2016

Fingerprint

Up-Regulation
Knockout Mice
Muscles
Genes
Calcium-Calmodulin-Dependent Protein Kinases
Calpain
Limb-girdle muscular dystrophy type 2A
Muscular Dystrophies
p38 Mitogen-Activated Protein Kinases
Transcriptome
Lipid Metabolism
Skeletal Muscle
Triglycerides
Fatty Acids
Lipids
Mutation

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics
  • Genetics(clinical)

Cite this

Kramerova, I., Ermolova, N., Eskin, A., Hevener, A., Quehenberger, O., Armando, A. M., ... Spencer, M. J. (2016). Failure to up-regulate transcription of genes necessary for muscle adaptation underlies limb girdle muscular dystrophy 2A (calpainopathy). Human Molecular Genetics, 25(11), 2194-2207. https://doi.org/10.1093/hmg/ddw086

Failure to up-regulate transcription of genes necessary for muscle adaptation underlies limb girdle muscular dystrophy 2A (calpainopathy). / Kramerova, Irina; Ermolova, Natalia; Eskin, Ascia; Hevener, Andrea; Quehenberger, Oswald; Armando, Aaron M.; Haller, Ronald; Romain, Nadine; Nelson, Stanley F.; Spencer, Melissa J.

In: Human Molecular Genetics, Vol. 25, No. 11, 01.06.2016, p. 2194-2207.

Research output: Contribution to journalArticle

Kramerova, I, Ermolova, N, Eskin, A, Hevener, A, Quehenberger, O, Armando, AM, Haller, R, Romain, N, Nelson, SF & Spencer, MJ 2016, 'Failure to up-regulate transcription of genes necessary for muscle adaptation underlies limb girdle muscular dystrophy 2A (calpainopathy)', Human Molecular Genetics, vol. 25, no. 11, pp. 2194-2207. https://doi.org/10.1093/hmg/ddw086
Kramerova, Irina ; Ermolova, Natalia ; Eskin, Ascia ; Hevener, Andrea ; Quehenberger, Oswald ; Armando, Aaron M. ; Haller, Ronald ; Romain, Nadine ; Nelson, Stanley F. ; Spencer, Melissa J. / Failure to up-regulate transcription of genes necessary for muscle adaptation underlies limb girdle muscular dystrophy 2A (calpainopathy). In: Human Molecular Genetics. 2016 ; Vol. 25, No. 11. pp. 2194-2207.
@article{bf1cd220b02f4f14901c6f0e7204703d,
title = "Failure to up-regulate transcription of genes necessary for muscle adaptation underlies limb girdle muscular dystrophy 2A (calpainopathy)",
abstract = "Limb girdle muscular dystrophy 2A is due to loss-of-function mutations in the Calpain 3 (CAPN3) gene. Our previous data suggest that CAPN3 helps to maintain the integrity of the triad complex in skeletal muscle. In Capn3 knock-out mice (C3KO), Ca2+release and Ca2+/calmodulin kinase II (CaMKII) signaling are attenuated. We hypothesized that calpainopathy may result from a failure to transmit loading-induced Ca2+-mediated signals, necessary to up-regulate expression of muscle adaptation genes. To test this hypothesis, we compared transcriptomes of muscles from wild type (WT) and C3KO mice subjected to endurance exercise. In WT mice, exercise induces a gene signature that includes myofibrillar, mitochondrial and oxidative lipid metabolismgenes, necessary for muscle adaptation. C3KO muscles fail to activate the same gene signature. Furthermore, in agreement with the aberrant transcriptional profile, we observe a commensurate functional defect in lipid metabolism whereby C3KO muscles fail to release fatty acids from stored triacylglycerol. In conjunction with the defects in oxidative metabolism, C3KO mice demonstrate reduced exercise endurance. Failure to up-regulate genes in C3KO muscles is due, in part, to decreased levels of PGC1a, a transcriptional co-regulator that orchestrates the muscle adaptation response. Destabilization of PGC1a is attributable to decreased p38 MAPK activation via diminished CaMKII signaling. Thus, we elucidate a pathway downstreamof Ca2+-mediated CaMKII activation that is dysfunctional in C3KO mice, leading to reduced transcription of genes involved in muscle adaptation. These studies identify a novel mechanism of muscular dystrophy: a blunted transcriptional response to muscle loading resulting in chronic failure to adapt and remodel.",
author = "Irina Kramerova and Natalia Ermolova and Ascia Eskin and Andrea Hevener and Oswald Quehenberger and Armando, {Aaron M.} and Ronald Haller and Nadine Romain and Nelson, {Stanley F.} and Spencer, {Melissa J.}",
year = "2016",
month = "6",
day = "1",
doi = "10.1093/hmg/ddw086",
language = "English (US)",
volume = "25",
pages = "2194--2207",
journal = "Human Molecular Genetics",
issn = "0964-6906",
publisher = "Oxford University Press",
number = "11",

}

TY - JOUR

T1 - Failure to up-regulate transcription of genes necessary for muscle adaptation underlies limb girdle muscular dystrophy 2A (calpainopathy)

AU - Kramerova, Irina

AU - Ermolova, Natalia

AU - Eskin, Ascia

AU - Hevener, Andrea

AU - Quehenberger, Oswald

AU - Armando, Aaron M.

AU - Haller, Ronald

AU - Romain, Nadine

AU - Nelson, Stanley F.

AU - Spencer, Melissa J.

PY - 2016/6/1

Y1 - 2016/6/1

N2 - Limb girdle muscular dystrophy 2A is due to loss-of-function mutations in the Calpain 3 (CAPN3) gene. Our previous data suggest that CAPN3 helps to maintain the integrity of the triad complex in skeletal muscle. In Capn3 knock-out mice (C3KO), Ca2+release and Ca2+/calmodulin kinase II (CaMKII) signaling are attenuated. We hypothesized that calpainopathy may result from a failure to transmit loading-induced Ca2+-mediated signals, necessary to up-regulate expression of muscle adaptation genes. To test this hypothesis, we compared transcriptomes of muscles from wild type (WT) and C3KO mice subjected to endurance exercise. In WT mice, exercise induces a gene signature that includes myofibrillar, mitochondrial and oxidative lipid metabolismgenes, necessary for muscle adaptation. C3KO muscles fail to activate the same gene signature. Furthermore, in agreement with the aberrant transcriptional profile, we observe a commensurate functional defect in lipid metabolism whereby C3KO muscles fail to release fatty acids from stored triacylglycerol. In conjunction with the defects in oxidative metabolism, C3KO mice demonstrate reduced exercise endurance. Failure to up-regulate genes in C3KO muscles is due, in part, to decreased levels of PGC1a, a transcriptional co-regulator that orchestrates the muscle adaptation response. Destabilization of PGC1a is attributable to decreased p38 MAPK activation via diminished CaMKII signaling. Thus, we elucidate a pathway downstreamof Ca2+-mediated CaMKII activation that is dysfunctional in C3KO mice, leading to reduced transcription of genes involved in muscle adaptation. These studies identify a novel mechanism of muscular dystrophy: a blunted transcriptional response to muscle loading resulting in chronic failure to adapt and remodel.

AB - Limb girdle muscular dystrophy 2A is due to loss-of-function mutations in the Calpain 3 (CAPN3) gene. Our previous data suggest that CAPN3 helps to maintain the integrity of the triad complex in skeletal muscle. In Capn3 knock-out mice (C3KO), Ca2+release and Ca2+/calmodulin kinase II (CaMKII) signaling are attenuated. We hypothesized that calpainopathy may result from a failure to transmit loading-induced Ca2+-mediated signals, necessary to up-regulate expression of muscle adaptation genes. To test this hypothesis, we compared transcriptomes of muscles from wild type (WT) and C3KO mice subjected to endurance exercise. In WT mice, exercise induces a gene signature that includes myofibrillar, mitochondrial and oxidative lipid metabolismgenes, necessary for muscle adaptation. C3KO muscles fail to activate the same gene signature. Furthermore, in agreement with the aberrant transcriptional profile, we observe a commensurate functional defect in lipid metabolism whereby C3KO muscles fail to release fatty acids from stored triacylglycerol. In conjunction with the defects in oxidative metabolism, C3KO mice demonstrate reduced exercise endurance. Failure to up-regulate genes in C3KO muscles is due, in part, to decreased levels of PGC1a, a transcriptional co-regulator that orchestrates the muscle adaptation response. Destabilization of PGC1a is attributable to decreased p38 MAPK activation via diminished CaMKII signaling. Thus, we elucidate a pathway downstreamof Ca2+-mediated CaMKII activation that is dysfunctional in C3KO mice, leading to reduced transcription of genes involved in muscle adaptation. These studies identify a novel mechanism of muscular dystrophy: a blunted transcriptional response to muscle loading resulting in chronic failure to adapt and remodel.

UR - http://www.scopus.com/inward/record.url?scp=84998886334&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84998886334&partnerID=8YFLogxK

U2 - 10.1093/hmg/ddw086

DO - 10.1093/hmg/ddw086

M3 - Article

VL - 25

SP - 2194

EP - 2207

JO - Human Molecular Genetics

JF - Human Molecular Genetics

SN - 0964-6906

IS - 11

ER -