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Related Experiment Videos

Exercise increases prolactin-receptor expression on human lymphocytes.

Keiichiro Dohi1, William J Kraemer, Andrea M Mastro

  • 1Department of Kinesiology, The Pennsylvania State University, University Park 16802, USA.

Journal of Applied Physiology (Bethesda, Md. : 1985)
|October 23, 2002
PubMed
Summary

Acute maximal exercise increases plasma prolactin and prolactin-receptor expression on B lymphocytes. This suggests exercise may enhance immune cell interaction with this stress hormone, potentially boosting immune function.

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Area of Science:

  • Immunology
  • Endocrinology
  • Exercise Physiology

Background:

  • Stress impacts the immune system and elevates plasma prolactin.
  • Prolactin influences immune system function and B lymphocytes.

Purpose of the Study:

  • To investigate the effects of maximal treadmill exercise on prolactin-receptor expression in lymphocytes.
  • To determine the relationship between exercise-induced prolactin changes and B lymphocyte prolactin receptor expression.

Main Methods:

  • Eight healthy men participated in both an exercise and a non-exercise session.
  • Blood samples were collected immediately before and after exercise, with resting samples for baseline.
  • Analyzed plasma prolactin concentrations and prolactin-receptor expression on B lymphocytes.

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Main Results:

  • Plasma prolactin levels significantly increased post-exercise.
  • Exercise elevated total prolactin-receptor expression per B lymphocyte.
  • Increased circulating B lymphocytes and those expressing prolactin receptors were observed post-exercise.

Conclusions:

  • Acute maximal exercise enhances prolactin-receptor expression on B lymphocytes.
  • Exercise may improve the interaction between immune cells and prolactin.
  • This interaction could potentially enhance stress hormone-mediated immune function.