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Related Concept Videos

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GPCRs Regulate Adenylyl Cylase Activity

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Related Experiment Video

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Application of Chronic Stimulation to Study Contractile Activity-induced Rat Skeletal Muscle Phenotypic Adaptations
09:50

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Published on: January 25, 2018

PGC-1alpha-mediated adaptations in skeletal muscle.

Jesper Olesen1, Kristian Kiilerich, Henriette Pilegaard

  • 1Department of Biology, Centre of Inflammation and Metabolism, Copenhagen Muscle Research Centre, University of Copenhagen, August Krogh Building, Universitetsparken 13, 2100, Copenhagen Ø, Denmark.

Pflugers Archiv : European Journal of Physiology
|April 20, 2010
PubMed
Summary

Regular physical activity enhances skeletal muscle metabolism by regulating genes via peroxisome proliferator-activated receptor-gamma coactivator (PGC)-1alpha. Inactivity reduces this PGC-1alpha effect, impairing muscle function.

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Area of Science:

  • Exercise physiology and molecular biology
  • Skeletal muscle adaptation
  • Metabolic disease prevention

Background:

  • Lifestyle diseases are rising due to decreased physical activity.
  • Skeletal muscle adaptations to exercise are crucial for metabolic health.
  • Peroxisome proliferator-activated receptor-gamma coactivator (PGC)-1alpha is a key regulator in skeletal muscle.

Purpose of the Study:

  • To review PGC-1alpha's role in regulating metabolic, antioxidant, and inflammatory proteins in skeletal muscle.
  • To describe the regulation of PGC-1alpha expression and activity.
  • To highlight PGC-1alpha's significance in skeletal muscle adaptation to exercise.

Main Methods:

  • Review of existing literature on PGC-1alpha in skeletal muscle.
  • Analysis of PGC-1alpha's role in basal and exercise-induced states.
  • Examination of PGC-1alpha's impact on gene expression and protein regulation.

Main Results:

  • Exercise upregulates PGC-1alpha transcription and activity.
  • PGC-1alpha mediates the expression of proteins involved in mitochondrial biogenesis, angiogenesis, and antioxidant defense.
  • PGC-1alpha influences inflammatory markers in skeletal muscle.

Conclusions:

  • PGC-1alpha is a master regulator of skeletal muscle adaptation to exercise.
  • Maintaining PGC-1alpha activity is vital for oxidative capacity and metabolism.
  • Reduced PGC-1alpha function due to inactivity contributes to impaired skeletal muscle metabolism.