AMPK and PPARβ positive feedback loop regulates endurance exercise training-mediated GLUT4 expression in skeletal muscle

Jin Ho Koh, Chad R. Hancock, Dong Ho Han, John O. Holloszy, K Sreekumaran Nair, Surendra Dasari

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The objective of this study is to determine whether AMP-activated protein kinase (AMPK), peroxisome proliferator-activated receptor gamma coactivator 1-α (PGC-1α), or peroxisome proliferator-activated receptor β (PPARβ) can independently mediate the increase of glucose transporter type 4 (GLUT4) expression that occurs in response to exercise training. We found that PPARβ can regulate GLUT4 expression without PGC-1α. We also found AMPK and PPARβ are important for maintaining normal physiological levels of GLUT4 protein in the sedentary condition as well following exercise training. However, AMPK and PPARβ are not essential for the increase in GLUT4 protein expression that occurs in response to exercise training. We discovered that AMPK activation increases PPARβ via myocyte enhancer factor 2A (MEF2A), which acted as a transcription factor for PPARβ. Furthermore, exercise training increases the cooperation of AMPK and PPARβ to regulate glucose uptake. In conclusion, cooperation between AMPK and PPARβ via NRF-1/MEF2A pathway enhances the exercise training mediated adaptive increase in GLUT4 expression and subsequent glucose uptake in skeletal muscle.

Original languageEnglish (US)
Pages (from-to)E931-E939
JournalAmerican journal of physiology. Endocrinology and metabolism
Volume316
Issue number5
DOIs
StatePublished - May 1 2019

Fingerprint

Glucose Transporter Type 4
Peroxisome Proliferator-Activated Receptors
AMP-Activated Protein Kinases
Skeletal Muscle
Exercise
MEF2 Transcription Factors
Glucose
Proteins
Transcription Factors

Keywords

  • AMPK
  • exercise training
  • GLUT4
  • PPARβ
  • skeletal muscle

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Physiology
  • Physiology (medical)

Cite this

AMPK and PPARβ positive feedback loop regulates endurance exercise training-mediated GLUT4 expression in skeletal muscle. / Koh, Jin Ho; Hancock, Chad R.; Han, Dong Ho; Holloszy, John O.; Nair, K Sreekumaran; Dasari, Surendra.

In: American journal of physiology. Endocrinology and metabolism, Vol. 316, No. 5, 01.05.2019, p. E931-E939.

Research output: Contribution to journalArticle

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