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Evidence for In Vivo High-Frequency Periodicity of Plasma Beta-Endorphin in Humans

Evidence for In Vivo High-Frequency Periodicity of Plasma Beta-Endorphin in Humans

Type of Publication: Journal article
Author: Imthurn, Bruno; Rosselli, Marinella; Beran, Jan; Keller, Paul J.
Year of publication: 1995
Published in: Hormone and Metabolic Research ; 27 (1995), 04. - pp. 189-193. - ISSN 0018-5043. - eISSN 1439-4286
Pubmed ID: 7750903
DOI (citable link): https://dx.doi.org/10.1055/s-2007-979937
Summary:
Objective
To investigate whether high-frequency periodic fluctuation in the release of plasma immunoreactive (ir)-beta-endorphin occurs in humans. Design, patients and measurements: Blood was collected at 90-sec intervals for 1 hour from the forearm vein of four healthy women and subsequently analysed for ir-beta-endorphin by radioimmunoassay.

Results
In all women circulating beta-endorphin release followed a high-frequency periodic rhythm pattern. The estimated spectral densities within the four subjects varied between 3.6 min to 4.9 min.

Conclusions
Our results provide the first in vivo evidence that fluctuations in the release of beta-endorphin in humans cannot only be characterized by low-frequency pulses, but also by a high frequency periodic rhythm.
Subject (DDC): 610 Medicine

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IMTHURN, Bruno, Marinella ROSSELLI, Jan BERAN, Paul J. KELLER, 1995. Evidence for In Vivo High-Frequency Periodicity of Plasma Beta-Endorphin in Humans. In: Hormone and Metabolic Research. 27(04), pp. 189-193. ISSN 0018-5043. eISSN 1439-4286. Available under: doi: 10.1055/s-2007-979937

@article{Imthurn1995-04Evide-27481, title={Evidence for In Vivo High-Frequency Periodicity of Plasma Beta-Endorphin in Humans}, year={1995}, doi={10.1055/s-2007-979937}, number={04}, volume={27}, issn={0018-5043}, journal={Hormone and Metabolic Research}, pages={189--193}, author={Imthurn, Bruno and Rosselli, Marinella and Beran, Jan and Keller, Paul J.} }

Keller, Paul J. Imthurn, Bruno Rosselli, Marinella terms-of-use 2014-04-07T09:32:43Z 2014-04-07T09:32:43Z Evidence for In Vivo High-Frequency Periodicity of Plasma Beta-Endorphin in Humans Beran, Jan Hormone and Metabolic Research ; 27 (1995), 4. - S. 189-193 Imthurn, Bruno eng Rosselli, Marinella Keller, Paul J. Objective<br />To investigate whether high-frequency periodic fluctuation in the release of plasma immunoreactive (ir)-beta-endorphin occurs in humans. Design, patients and measurements: Blood was collected at 90-sec intervals for 1 hour from the forearm vein of four healthy women and subsequently analysed for ir-beta-endorphin by radioimmunoassay.<br /><br />Results<br />In all women circulating beta-endorphin release followed a high-frequency periodic rhythm pattern. The estimated spectral densities within the four subjects varied between 3.6 min to 4.9 min.<br /><br />Conclusions<br />Our results provide the first in vivo evidence that fluctuations in the release of beta-endorphin in humans cannot only be characterized by low-frequency pulses, but also by a high frequency periodic rhythm. Beran, Jan 1995-04

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