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Factors other than glucocorticoids are involved in the osteoblast activity decrease caused by tissue injury.

J M Olmos1, J A Amado, C Valero

  • 1Department of Internal Medicine, Hospital Marques de Valdecilla, University of Cantabria, Santander, Spain.

Clinical Endocrinology
|February 21, 2006
PubMed
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Tissue injury decreases serum osteocalcin, but this effect is independent of increased cortisol. Glucocorticoids do not appear to inhibit osteoprotegerin within 24 hours post-surgery.

Area of Science:

  • Endocrinology
  • Bone Metabolism
  • Surgical Physiology

Background:

  • Serum osteocalcin (a bone formation marker) decreases with tissue injury.
  • Glucocorticoids, often elevated during injury, are known to lower serum osteocalcin.

Purpose of the Study:

  • To investigate the role of glucocorticoids in the decrease of serum osteocalcin following surgical tissue injury.
  • To determine if cortisol influences osteoprotegerin (OPG) levels post-surgery.

Main Methods:

  • Compared serum osteocalcin levels in patients receiving thiopental versus etomidate (a glucocorticoid synthesis inhibitor) during abdominal surgery.
  • Measured serum osteocalcin, cortisol, albumin, OPG, and RANKL before and up to 24 hours after surgery.

Main Results:

Related Experiment Videos

  • Serum osteocalcin decreased similarly in both thiopental and etomidate groups, despite differing cortisol responses.
  • Cortisol levels increased with thiopental anesthesia but decreased with etomidate.
  • Serum OPG and RANKL levels remained unchanged post-surgery.

Conclusions:

  • The post-injury decrease in serum osteocalcin is not mediated by the surge in cortisol.
  • Cortisol's inhibitory effect on OPG was not observed within 24 hours after surgery, irrespective of cortisol levels.