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Related Experiment Videos

Hematopoietic changes in rats after inescapable and escapable shocks

S A Malacrida1, N A Teixeira, M L Queiroz

  • 1Department of Pharmacology and Hemocentre, Faculty of Medical Sciences, State University of Campinas, SP, Brazil.

Immunopharmacology and Immunotoxicology
|January 22, 1998
PubMed
Summary

Stress significantly impacts bone marrow, reducing key blood cell precursors. This myelosuppressive effect is reversible, particularly in confined animals, highlighting stress-induced bone marrow suppression.

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Area of Science:

  • Hematology
  • Neuroscience
  • Toxicology

Background:

  • Bone marrow cell responsiveness is crucial for hematopoiesis.
  • Stressors can potentially impact bone marrow function and blood cell production.

Purpose of the Study:

  • To investigate the effects of different stress paradigms on bone marrow cell responsiveness in rats.
  • To determine if stress-induced changes in bone marrow are reversible.

Main Methods:

  • Rats were subjected to confinement, inescapable shocks, escapable shocks, or served as controls.
  • Bone marrow cell counts, specifically granulocyte-macrophage precursors, were analyzed.

Main Results:

  • A significant reduction in granulocyte-macrophage precursors was observed in confined rats and those exposed to inescapable shocks.

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  • The myelosuppressive effects were reversible in both stress groups.
  • Reversibility occurred sooner in the confined group compared to the inescapable shock group.
  • No significant changes were noted in rats exposed to escapable shocks.

    • Conclusions:

    • Confinement and inescapable stress suppress bone marrow precursor cells.
    • Stress-induced myelosuppression is a reversible phenomenon.
    • The type and controllability of stress influence the severity and reversibility of bone marrow suppression.