Myostatin dysfunction is associated with lower physical activity and reduced improvements in glucose tolerance in response to caloric restriction in Berlin high mice

Mindaugas Kvedaras, Petras Minderis, Raulas Krusnauskas, Arimantas Lionikas, Aivaras Ratkevicius*

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Myostatin is an inhibitor of skeletal muscle growth and might be involved in adaptations to caloric restriction (CR). We compared responses to 12-week 30% CR in male mice of Berlin high strain with myostatin dysfunction (BEH) and wild-type myostatin (BEH+/+). BEH mice were heavier than BEH+/+ mice (58.8 ± 2.0 versus 53.1 ± 2.7 g, p < 0.001), had 1.8-fold greater hind limb muscle mass and were less (p < 0.05) physically active when fed ad libitum. After CR, BEH and BEH+/+ strains experienced similar weight loss (24.7 ± 5.7 versus 20.6 ± 6.5%, p > 0.05, respectively) and decreases (p < 0.001) in plasma IGF-1 and total cholesterol, but loss of hind limb muscle mass was greater (p < 0.001) in BEH mice than BEH+/+ mice. BEH mice had better (p < 0.001) glucose tolerance and showed smaller (p < 0.05) improvements of it than BEH+/+ mice after CR (1038.2 ± 174.7 versus 744.4 ± 95.8 glucose mM× 120 min, p < 0.01 for BEH; 1365.8 ± 218.5 versus 831.5 ± 134.4 glucose mM ×120 min, p < 0.001, for BEH+/+, respectively). In summary, myostatin dysfunction is associated with muscle hypertrophy and high glucose tolerance, but greater muscle wasting and smaller improvements in glucose tolerance in response to CR.

Original languageEnglish
Article number110751
Number of pages11
JournalExperimental Gerontology
Volume128
Early online date22 Oct 2019
DOIs
Publication statusPublished - Dec 2019

Keywords

  • Caloric restriction
  • Glucose tolerance
  • Myostatin, muscle fiber composition
  • Skeletal muscle

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