Mitochondrial diseases are a heterogeneous group of monogenic disorders that result from impaired oxidative phosphorylation (OXPHOS). As neuromuscular tissues are highly energy-dependent, mitochondrial diseases often affect skeletal muscle. Although genetic and bioenergetic causes of OXPHOS impairment in human mitochondrial myopathies are well established, there is a limited understanding of metabolic drivers of muscle degeneration. This knowledge gap contributes to the lack of effective treatments for these disorders. Here, we discovered fundamental muscle metabolic remodeling mechanisms shared by mitochondrial disease patients and a mouse model of mitochondrial myopathy. This metabolic remodeling is triggered by a starvation-like response that evokes accelerated oxidation of amino acids through a truncated Krebs cycle. While initially adaptive, this response evolves in an integrated multiorgan catabolic signaling, lipid store mobilization, and intramuscular lipid accumulation. We show that this multiorgan feed-forward metabolic response involves leptin and glucocorticoid signaling. This study elucidates systemic metabolic dyshomeostasis mechanisms that underlie human mitochondrial myopathies and identifies potential new targets for metabolic intervention.

A coordinated multiorgan metabolic response contributes to human mitochondrial myopathy / Southwell N.; Primiano G.; Nadkarni V.; Attarwala N.; Beattie E.; Miller D.; Alam S.; Liparulo I.; Shurubor Y.I.; Valentino M.L.; Carelli V.; Servidei S.; Gross S.S.; Manfredi G.; Chen Q.; D'Aurelio M.. - In: EMBO MOLECULAR MEDICINE. - ISSN 1757-4676. - ELETTRONICO. - 15:7(2023), pp. e16951.1-e16951.26. [10.15252/emmm.202216951]

A coordinated multiorgan metabolic response contributes to human mitochondrial myopathy

Valentino M. L.;Carelli V.;
2023

Abstract

Mitochondrial diseases are a heterogeneous group of monogenic disorders that result from impaired oxidative phosphorylation (OXPHOS). As neuromuscular tissues are highly energy-dependent, mitochondrial diseases often affect skeletal muscle. Although genetic and bioenergetic causes of OXPHOS impairment in human mitochondrial myopathies are well established, there is a limited understanding of metabolic drivers of muscle degeneration. This knowledge gap contributes to the lack of effective treatments for these disorders. Here, we discovered fundamental muscle metabolic remodeling mechanisms shared by mitochondrial disease patients and a mouse model of mitochondrial myopathy. This metabolic remodeling is triggered by a starvation-like response that evokes accelerated oxidation of amino acids through a truncated Krebs cycle. While initially adaptive, this response evolves in an integrated multiorgan catabolic signaling, lipid store mobilization, and intramuscular lipid accumulation. We show that this multiorgan feed-forward metabolic response involves leptin and glucocorticoid signaling. This study elucidates systemic metabolic dyshomeostasis mechanisms that underlie human mitochondrial myopathies and identifies potential new targets for metabolic intervention.
2023
A coordinated multiorgan metabolic response contributes to human mitochondrial myopathy / Southwell N.; Primiano G.; Nadkarni V.; Attarwala N.; Beattie E.; Miller D.; Alam S.; Liparulo I.; Shurubor Y.I.; Valentino M.L.; Carelli V.; Servidei S.; Gross S.S.; Manfredi G.; Chen Q.; D'Aurelio M.. - In: EMBO MOLECULAR MEDICINE. - ISSN 1757-4676. - ELETTRONICO. - 15:7(2023), pp. e16951.1-e16951.26. [10.15252/emmm.202216951]
Southwell N.; Primiano G.; Nadkarni V.; Attarwala N.; Beattie E.; Miller D.; Alam S.; Liparulo I.; Shurubor Y.I.; Valentino M.L.; Carelli V.; Servidei S.; Gross S.S.; Manfredi G.; Chen Q.; D'Aurelio M.
File in questo prodotto:
File Dimensione Formato  
southwell-et-al-2023.pdf

accesso aperto

Tipo: Versione (PDF) editoriale
Licenza: Licenza per Accesso Aperto. Creative Commons Attribuzione (CCBY)
Dimensione 4.48 MB
Formato Adobe PDF
4.48 MB Adobe PDF Visualizza/Apri
emmm202216951-sup-0002-sdataev.zip

accesso aperto

Tipo: File Supplementare
Licenza: Licenza per accesso libero gratuito
Dimensione 2.55 MB
Formato Zip File
2.55 MB Zip File Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/960238
Citazioni
  • ???jsp.display-item.citation.pmc??? 3
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 3
social impact