Beta-Endorphin Response to an Acute Pain Stimulus


Beta-Endorphin Response to an Acute Pain Stimulus


Rasmussen NA; Farr LA


Journal Of Neuroscience Methods




Male; Pain Measurement; Time Factors; Reproducibility of Results; Animals; Mice; Acute Disease; Biomarkers of Pain; Physical Stimulation; Animal; beta-Endorphin/analysis/metabolism/secretion; Biological Markers/analysis/blood; Disease Models; Inbred DBA; Neurochemistry/methods; Pain/blood/physiopathology; Radioimmunoassay/methods; Up-Regulation/physiology


The timing of the measurement of biological samples (e.g. biomarkers) is not always standardized. Biomarkers are the focus of many recent studies and treatments. The purpose of this study was to determine the timing of the release of beta-endorphin (BE), a possible biomarker, after exposure to pain and/or handling stress in order to standardize measurements. Mouse plasma was collected for BE analysis following handling i.e. being picked up by the investigator, exposure to a painful (55 degrees C hot-plate), or exposure to a nonpainful stimulus (room temperature hot-plate). The groups exposed to either a painful or nonpainful stimulus released BE in response to the stimulus, but the duration of the response was longer in mice exposed to a painful stimulus than in mice exposed to a nonpainful stimulus. The BE in the mice exposed to a nonpainful stimulus peaked at 1 min and returned to baseline levels by 5 min while the BE response of the mice exposed to a painful stimulus peaked at 10 min and remained elevated for 25 min. The results of this study indicate that BE can be a biomarker for pain and handling stress, however, the timing of the measurement should differ.


Article information provided for research and reference use only. PedPalASCNET does not hold any rights over the resource listed here. All rights are retained by the journal listed under publisher and/or the creator(s).


Journal Article

Citation List Month



Rasmussen NA; Farr LA, “Beta-Endorphin Response to an Acute Pain Stimulus,” Pediatric Palliative Care Library, accessed April 24, 2024,