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Related Experiment Videos

Pathophysiological changes evoked by lipopolysaccharide administration in goats

Y Takeuchi1, T Kikusui, O Kizumi

  • 1Laboratory of Veterinary Ethology, University of Tokyo, Japan.

The Journal of Veterinary Medical Science
|February 1, 1997
PubMed
Summary

Endotoxin administration in goats triggers a predictable sequence of immune, neuroendocrine, and metabolic responses. This establishes a model for studying infection-related behavioral changes in ruminants.

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Area of Science:

  • Veterinary immunology
  • Neuroendocrinology
  • Ruminant physiology

Background:

  • Acute infections trigger complex physiological responses.
  • Understanding immuno-neuroendocrine pathways is crucial for modeling disease effects.
  • Ovariectomized goats serve as a model for studying physiological responses.

Purpose of the Study:

  • To establish an experimental model for studying immuno-neuroendocrine mechanisms.
  • To examine the temporal relationship of physiological responses to endotoxin administration.
  • To investigate behavioral changes during acute infection in goats.

Main Methods:

  • Intravenous injection of lipopolysaccharide (endotoxin) in ovariectomized goats.
  • Monitoring of white blood cell count, rectal temperature, heart rate.

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  • Measurement of plasma levels of adrenocorticotropic hormone, cortisol, glucose, and free fatty acids.

    • Main Results:

    • Abrupt decrease in white blood cell count post-endotoxin injection.
    • Gradual increase in rectal temperature, followed by elevated hormone and metabolite levels.
    • Subsequent increase in heart rate, indicating a cascade of responses.

    Conclusions:

    • Endotoxin administration elicits a stereotyped cascade of febrile, neuroendocrine, and metabolic responses.
    • This response pattern is linked to immune system activation in ruminants.
    • The study provides a model for investigating infection-induced physiological changes.