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Acute exercise-induced nitric oxide production contributes to upregulation of circulating endothelial progenitor cells in healthy subjects

Journal of Human Hypertension volume 21, pages 452–460 (2007)Cite this article

Abstract

Exercise has been proved to promote the number and activity of circulating endothelial progenitor cells (EPCs) in humans, which contributes to improvement in endothelial function and maintenance of cardiovascular homoeostasis. However, the mechanism underlying the effect of exercise on circulating EPCs in healthy subjects is not completely understood. Here, we investigated whether the regulation of acute exercise on circulating EPCs is associated with nitric oxide (NO), vascular endothelial growth factors (VEGF) and granulocyte macrophage colony stimulating factor (GM-CSF) known to modulate circulating EPCs in healthy subjects. A total of 16 healthy male volunteers underwent a modified Bruce treadmill acute exercise protocol. The number and activity of circulating EPCs, as well as the levels of NO-VEGF and GM-CSF in plasma and culture medium before and after exercise in healthy subjects were measured. The number and activity of circulating EPCs after acute exercise were significantly higher than those before exercise in healthy subjects. In parallel, acute exercise significantly enhanced plasma NO level in healthy subjects. There is a significant linear regression relationship between the enhanced plasma NO level and increased number or activity of circulating EPCs. However, no change of plasma VEGF and GM-CSF level was observed after acute exercise. The secretion of NO-VEGF and GM-CSF by cultured EPCs remained unchanged in response to acute exercise. The present study demonstrates for the first time that acute exercise-induced NO production contributes to upregulation of circulating EPCs in healthy subjects, which suggests that NO plays an important role in the regulation of exercise on circulating EPCs.

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Acknowledgements

This work was financially supported by National Nature Science Foundation of China (Project Nos: 30270370, 30470475) for scientific research. We thank Professor Wu-Teacher Feng and Dr Huang of Immunology Department of Sun Yat-Sen University for providing experimental instruments and instruction of ELISA method.

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  1. Z Yang and J-M Wang: These authors contributed equally to this work.

Authors and Affiliations

  1. Department of Cardiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China

    Z Yang, J-M Wang, L Chen, C-F Luo, A-L Tang & J Tao

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  1. Z Yang
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Correspondence to J Tao.

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Yang, Z., Wang, JM., Chen, L. et al. Acute exercise-induced nitric oxide production contributes to upregulation of circulating endothelial progenitor cells in healthy subjects. J Hum Hypertens 21, 452–460 (2007). https://doi.org/10.1038/sj.jhh.1002171

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  • DOI: https://doi.org/10.1038/sj.jhh.1002171

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