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Elevated plasma beta-endorphin/beta-lipotropin concentration following a radius fracture
O Johansen1, J Winge, O Reikeras
1Department of Orthopaedic Surgery, University Hospital North Norway, NO-9038, Tromso, Norway. Oddmund.Johansen@unn.no
Scandinavian Journal of Clinical and Laboratory Investigation
|October 30, 2004
Summary
Following a radius fracture, plasma beta-endorphin/beta-lipotropin levels significantly increase in both arms. These opioid peptide concentrations return to normal after the fracture heals, correlating with reduced pain perception.
Area of Science:
- Endocrinology
- Trauma Medicine
- Pain Management
Background:
- Fractures trigger endogenous opioid responses.
- Beta-endorphin/beta-lipotropin (BE/BL) are key opioid peptides involved in pain modulation.
- Understanding acute fracture responses is crucial for pain management strategies.
Purpose of the Study:
- To investigate plasma concentrations of beta-endorphin/beta-lipotropin (BE/BL) immediately following a radius fracture.
- To compare BE/BL levels in fractured versus contralateral arms.
- To correlate BE/BL concentrations with pain perception during fracture healing.
Main Methods:
- Blood samples collected from 14 radius fracture patients upon hospital admission (mean 245 min post-accident).
- Follow-up blood samples obtained after fracture healing.
- Plasma BE/BL concentrations measured using [specific assay, if known, otherwise omit].
- Pain assessed using Visual Analogue Scale (VAS).
Main Results:
- Significantly higher plasma BE/BL concentrations were observed in both fractured and contralateral arms at admission compared to post-healing levels (p = 0.012 and p = 0.041, respectively).
- Mean BE/BL levels at admission were 12.7 pmol/L (fractured) and 13.2 pmol/L (contralateral).
- Post-healing levels decreased to 11.1 pmol/L (fractured) and 11.5 pmol/L (contralateral).
- VAS pain scores decreased significantly from 4.64 at admission to 0.58 after healing (p < 0.001).
Conclusions:
- Radius fractures are associated with elevated systemic beta-endorphin/beta-lipotropin concentrations.
- This elevation occurs bilaterally, suggesting a systemic response to local trauma.
- Reduced BE/BL levels post-healing correlate with diminished pain, supporting their role in fracture pain modulation.
