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01.06.2014 | Original Article | Ausgabe 6/2014

European Journal of Applied Physiology 6/2014

The detection and measurement of interleukin-6 in venous and capillary blood samples, and in sweat collected at rest and during exercise

Zeitschrift:
European Journal of Applied Physiology > Ausgabe 6/2014
Autoren:
Steve H. Faulkner, Kate L. Spilsbury, James Harvey, Andrew Jackson, Jingfeng Huang, Mark Platt, Alfred Tok, Myra A. Nimmo
Wichtige Hinweise
Communicated by Fabio Fischetti.

Abstract

Purpose

This study aimed to quantify the relationship between venous and capillary blood sampling methods for the measurement of plasma interleukin-6 (IL-6). A parallel study was conducted to determine the possibility of measuring IL-6 in sweat using an enzyme-linked immunosorbent assay (ELISA) and investigate the relationship between plasma- and sweat-derived measures of IL-6.

Methods

Twelve male participants were recruited for the measurement of IL-6 at rest and during exercise (study 1). An additional group of five female participants was recruited for the measurement of IL-6 in venous blood versus sweat at rest and following exercise (study 2). In study 1, venous and capillary blood samples were collected at rest and in response to exercise. In study 2, venous and sweat samples were collected following exercise.

Results

Mean plasma IL-6 concentration was not different between venous and capillary blood sampling methods either at rest (4.27 ± 5.40 vs. 4.14 ± 4.45 pg ml−1), during (5.40 ± 5.17 vs. 5.58 ± 6.34 pg ml−1), or in response to exercise (6.95 ± 6.37 vs. 6.99 ± 6.74 pg ml−1). There was no IL-6 detectable in sweat either at rest or following exercise.

Conclusion

There are no differences in the measurement of plasma IL-6 using either venous or capillary blood sampling methods. Capillary measurement represents a minimally invasive way of measuring IL-6 and detecting changes in IL-6, which are linked to fatigue and overtraining.

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