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Aging Clinical and Experimental Research

, Volume 27, Issue 4, pp 403–411 | Cite as

Effects of chronic high-fat feeding on skeletal muscle mass and function in middle-aged mice

  • Sang-Rok Lee
  • Andy V. Khamoui
  • Edward Jo
  • Bong-Sup Park
  • Michael C. Zourdos
  • Lynn B. Panton
  • Michael J. Ormsbee
  • Jeong-Su KimEmail author
Original Article

Abstract

Background and aims

Increased adipose tissue may promote catabolic events in skeletal muscle. The aim of this study was to test whether high-fat diet (HFD)-induced obesity would accelerate the onset of muscle wasting in middle-aged mice.

Methods

Muscle was collected from C57BL/6 mice at 9 months of age (baseline) and 14 months of age after consuming a control (C) or HFD. Mice in C and HFD were also subjected to evaluations of body composition and function before and after their respective diets.

Results

HFD demonstrated significant (p < 0.05) losses of grip strength (−15 %) and sensorimotor coordination (−11 %), whereas C did not. Lean mass decreased to a greater degree in HFD although not significantly (C: −20.69 ± 7.94 vs. HFD: −31.14 ± 5.49 %, p > 0.05). Gastrocnemius, quadriceps, and hamstrings mass in C and HFD were significantly reduced from baseline (−27 to 43 and −39 to 47 %, respectively, p < 0.05) with no differences between the two; however, soleus mass was lower only in HFD (−24 %, p = 0.03). Myofiber area, satellite cells, and myonuclei of the gastrocnemius were lower only in HFD (−23, −19, and −16 %, respectively, p < 0.05) compared to baseline.

Conclusions

HFD-induced obesity adversely affected function in middle-aged mice. Atrophy of the soleus in HFD but not C suggests sensitivity of oxidative muscle to HFD-dependent catabolism more so than aging. In the muscles containing fast/mixed fibers, aging effects may have concealed the catabolic nature of HFD; however, morphological changes in the gastrocnemius including decreased fiber area, satellite cells, and myonuclei are consistent with an atrophic phenotype related to HFD.

Keywords

Aging High-fat diet Obesity Functionality Body composition 

Notes

Acknowledgments

The authors acknowledge the efforts of Dr. Samuel C. Grant, Dr. Bahram H. Arjmandi, Dr. Paul C. Henning, and Dr. Chris Boehm for their technical assistance. This work was partially supported by Sekwang Inc., Florida State University, Vital Pharmaceuticals, and Ocean Nutrition.

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Sang-Rok Lee
    • 3
  • Andy V. Khamoui
    • 1
    • 2
  • Edward Jo
    • 4
  • Bong-Sup Park
    • 1
  • Michael C. Zourdos
    • 5
  • Lynn B. Panton
    • 1
    • 2
  • Michael J. Ormsbee
    • 1
    • 2
  • Jeong-Su Kim
    • 1
    • 2
    Email author
  1. 1.Department of Nutrition, Food and Exercise SciencesFlorida State UniversityTallahasseeUSA
  2. 2.The Center for Advancing Exercise and Nutrition Research on AgingFlorida State UniversityTallahasseeUSA
  3. 3.Department of Health and Sport SciencesThe University of MemphisMemphisUSA
  4. 4.Department of Kinesiology and Health PromotionCalifornia State Polytechnic University, PomonaPomonaUSA
  5. 5.Department of Exercise Science and Health PromotionFlorida Atlantic UniversityBoca RatonUSA

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