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Related Experiment Videos

Second messengers in thrombin-stimulated bone resorption.

P H Stern1, V M Stathopoulos, G Shankar

  • 1Department of Pharmacology, Northwestern University, Chicago, IL 60611.

Journal of Bone and Mineral Research : the Official Journal of the American Society for Bone and Mineral Research
|May 1, 1990
PubMed
Summary
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Thrombin, a key enzyme, stimulates bone resorption by activating specific cellular pathways. This study reveals thrombin

Area of Science:

  • Biochemistry
  • Bone Biology
  • Cell Signaling

Background:

  • Thrombin plays a role in various physiological processes.
  • Its specific role in bone resorption and intracellular signaling is not fully elucidated.

Purpose of the Study:

  • To investigate the effects of human and bovine thrombins on bone resorption.
  • To examine the involvement of cyclic AMP and phosphoinositide signaling pathways in thrombin-mediated bone resorption.

Main Methods:

  • In vitro bone resorption assays using fetal rat limb bones.
  • Measurement of cyclic AMP and phosphoinositide levels.
  • Use of catalytically inactivated thrombin as a control.

Main Results:

  • Both human and bovine thrombins stimulated bone resorption.

Related Experiment Videos

  • Human alpha-thrombin and one bovine thrombin preparation increased cyclic AMP.
  • All active thrombins, except inactivated DIP-alpha-thrombin, elevated inositol phosphate production, suggesting pathway involvement.

    • Conclusions:

    • Thrombin stimulates bone resorption in vitro.
    • The phosphoinositide pathway is implicated in thrombin-mediated bone resorption.
    • Further research into thrombin's role in bone metabolism is warranted.