Deficient muscle regeneration potential in sarcopenic COPD patients: Role of satellite cells

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• dc.contributor.author Sancho Muñoz, Antonio
• dc.contributor.author Guitart, Maria
• dc.contributor.author Rodríguez, Diego
• dc.contributor.author Gea Guiral, Joaquim
• dc.contributor.author Martínez-Llorens, Juana Mª
• dc.contributor.author Barreiro Portela, Esther
• dc.date.accessioned 2021-09-27T06:27:56Z
• dc.date.issued 2021
• dc.description.abstract Sarcopenia is a major comorbidity in chronic obstructive pulmonary (COPD). Whether deficient muscle repair mechanisms and regeneration exist in the vastus lateralis (VL) of sarcopenic COPD remains debatable. In the VL of control subjects and severe COPD patients with/without sarcopenia, satellite cells (SCs) were identified (immunofluorescence, specific antibodies, anti-Pax-7, and anti-Myf-5): activated (Pax-7+/Myf-5+), quiescent/regenerative potential (Pax-7+/Myf-5-), and total SCs, nuclear activation (terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling [TUNEL]), and muscle fiber type (morphometry and slow- and fast-twitch, and hybrid fibers), muscle damage (hematoxylin-eosin staining), muscle regeneration markers (Pax-7, Myf-5, myogenin, and MyoD), and myostatin levels were identified. Compared to controls, in VL of sarcopenic COPD patients, myostatin content, activated SCs, hybrid fiber proportions, TUNEL-positive cells, internal nuclei, and muscle damage significantly increased, while quadriceps muscle strength, numbers of Pax-7+/Myf-5- and slow- and fast-twitch, and hybrid myofiber areas decreased. In the VL of sarcopenic and nonsarcopenic patients, TUNEL-positive cells were greater, whereas muscle regeneration marker expression was lower than in controls. In VL of severe COPD patients regardless of the sarcopenia level, the muscle regeneration process is triggered as identified by SC activation and increased internal nuclei. Nonetheless, a lower regenerative potential along with significant alterations in muscle phenotype and damage, and increased myostatin were prominently seen in sarcopenic COPD.
• dc.format.mimetype application/pdf
• dc.identifier.citation Sancho-Muñoz A, Guitart M, Rodríguez DA, Gea J, Martínez-Llorens J, Barreiro E. Deficient muscle regeneration potential in sarcopenic COPD patients: Role of satellite cells. J Cell Physiol. 2021; 236(4):3083-98. DOI: 10.1002/jcp.30073
• dc.identifier.doi http://dx.doi.org/10.1002/jcp.30073
• dc.identifier.issn 0021-9541
• dc.identifier.uri http://hdl.handle.net/10230/48502
• dc.language.iso eng
• dc.publisher Wiley
• dc.relation.ispartof J Cell Physiol. 2021; 236(4):3083-98
• dc.rights This is the peer reviewed version of the following article: Sancho-Muñoz A, Guitart M, Rodríguez DA, Gea J, Martínez-Llorens J, Barreiro E. Deficient muscle regeneration potential in sarcopenic COPD patients: Role of satellite cells. J Cell Physiol. 2021; 236(4):3083-98. DOI: 10.1002/jcp.30073, which has been published in final form at http://dx.doi.org/10.1002/jcp.30073. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
• dc.rights.accessRights info:eu-repo/semantics/openAccess
• dc.subject.keyword COPD
• dc.subject.keyword Lower limb muscles
• dc.subject.keyword Muscle regeneration markers
• dc.subject.keyword Myostatin
• dc.subject.keyword Satellite cells
• dc.title Deficient muscle regeneration potential in sarcopenic COPD patients: Role of satellite cells
• dc.type info:eu-repo/semantics/article
• dc.type.version info:eu-repo/semantics/acceptedVersion