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Circulating transforming growth factor beta1 (TGFbeta1) is elevated by extensive exercise.

S Hering1, C Jost, H Schulz

  • 1Department of Internal Medicine, University-Hospital, BG-Clinic "Bergmannsheil", Ruhr-University Bochum, 44789 Bochum, Germany. steffen.hering@ruhr-uni-bochum.de

European Journal of Applied Physiology
|March 8, 2002
PubMed
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Heavy exercise temporarily increases latent transforming growth factor beta1 (TGFbeta1) in plasma. This suggests bone cells may contribute to TGFbeta1 changes during strength training.

Area of Science:

  • Biochemistry
  • Physiology
  • Exercise Science

Background:

  • Transforming growth factor beta1 (TGFbeta1) is a key regulator of cellular processes, including bone metabolism.
  • Latent TGFbeta1 is stored in platelets and released into circulation, particularly in serum.
  • The impact of physical activity on circulating TGFbeta1 levels remains incompletely understood.

Purpose of the Study:

  • To develop a method for quantifying latent TGFbeta1 in plasma.
  • To investigate the effect of a 4-week strength training program on plasma TGFbeta1 levels.
  • To explore the relationship between exercise-induced bone formation and TGFbeta1 dynamics.

Main Methods:

  • Developed a sandwich ELISA technique for latent TGFbeta1 measurement.
  • Recruited healthy students for a 4-week heavy exercise program.

Related Experiment Videos

  • Collected plasma samples at baseline, during, and after the training intervention.

    • Main Results:

    • Established reproducible measurements for latent plasma TGFbeta1 (500-600 pg/ml).
    • Observed a significant transient increase in plasma TGFbeta1 after 2 weeks of training (710 pg/ml).
    • Found no detectable active TGFbeta1 in plasma, contrasting with high levels in serum.

    Conclusions:

    • Heavy exercise transiently elevates latent TGFbeta1 concentrations in plasma.
    • The observed changes are likely influenced by enhanced TGFbeta1 production or release from bone cells.
    • Plasma TGFbeta1 levels are distinct from serum levels, with no active TGFbeta1 measurable in plasma.