Lipocalin 2 increases after high-intensity exercise in humans and influences muscle gene expression and differentiation in mice.
J Cell Physiol
; 237(1): 551-565, 2022 01.
Article
en En
| MEDLINE
| ID: mdl-34224151
ABSTRACT
Lipocalin 2 (LCN2) is an adipokine that accomplishes several functions in diverse organs. However, its importance in muscle and physical exercise is currently unknown. We observed that following acute high-intensity exercise ("Gran Sasso d'Italia" vertical run), LCN2 serum levels were increased. The Wnt pathway antagonist, DKK1, was also increased after the run, positively correlating with LCN2, and the same was found for the cytokine Interleukin 6. We, therefore, investigated the involvement of LCN2 in muscle physiology employing an Lcn2 global knockout (Lcn2-/- ) mouse model. Lcn2-/- mice presented with smaller muscle fibres but normal muscle performance (grip strength metre) and muscle weight. At variance with wild type (WT) mice, the inflammatory cytokine Interleukin 6 was undetectable in Lcn2-/- mice at all ages. Intriguingly, Lcn2-/- mice did not lose gastrocnemius and quadriceps muscle mass and muscle performance following hindlimb suspension, while at variance with WT, they lose soleus muscle mass. In vitro, LCN2 treatment reduced the myogenic differentiation of C2C12 and primary mouse myoblasts and influenced their gene expression. Treating myoblasts with LCN2 reduced myogenesis, suggesting that LCN2 may negatively affect muscle physiology when upregulated following high-intensity exercise.
Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Interleucina-6
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Lipocalina 2
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Músculos
Tipo de estudio:
Prognostic_studies
Límite:
Animals
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Humans
Idioma:
En
Revista:
J Cell Physiol
Año:
2022
Tipo del documento:
Article
País de afiliación:
Italia