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Evidence for in vivo high-frequency periodicity of plasma beta-endorphin in humans - Zurich Open Repository and Archive


Imthurn, B; Rosselli, M; Beran, Jan; Keller, P J (1995). Evidence for in vivo high-frequency periodicity of plasma beta-endorphin in humans. Hormone and metabolic research = Hormon- und Stoffwechselforschung = Hormones et métabolisme, 27(4):189-193.

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Abstract

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.

Abstract

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.

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3 citations in Web of Science®
2 citations in Scopus®
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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Epidemiology, Biostatistics and Prevention Institute (EBPI)
Dewey Decimal Classification:610 Medicine & health
Language:English
Date:April 1995
Deposited On:13 Aug 2015 14:16
Last Modified:05 Apr 2016 19:21
Publisher:Georg Thieme Verlag
ISSN:0018-5043
Publisher DOI:https://doi.org/10.1055/s-2007-979937
PubMed ID:7750903

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