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Related Experiment Videos

Goats as an osteopenic animal model.

K S Leung1, W S Siu, N M Cheung

  • 1Department of Orthopedics and Traumatology, The Chinese University of Hong Kong, Shatin.

Journal of Bone and Mineral Research : the Official Journal of the American Society for Bone and Mineral Research
|January 5, 2002
PubMed
Summary

Ovariectomy combined with a low-calcium diet effectively created an osteopenic goat model. This model demonstrated reduced bone mineral density and impaired mechanical bone properties, valuable for osteoporosis research.

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Area of Science:

  • Comparative pathology
  • Animal models for bone disease
  • Osteoporosis research

Background:

  • Osteoporosis research requires large animal models that accurately mimic human osteoporotic changes.
  • Establishing such models is crucial for understanding disease progression and testing interventions.

Purpose of the Study:

  • To establish a large osteopenic animal model in goats.
  • To evaluate the efficacy of ovariectomy (OVX) and a low-calcium diet in inducing osteopenia and bone property deterioration.

Main Methods:

  • Twenty-five Chinese mountain goats underwent either OVX with a low-calcium diet (n=16) or sham-operation (SHAM; n=9).
  • Bone mineral density (BMD) was assessed using photodensitometry, peripheral quantitative computed tomography (pQCT), and post-mortem analysis of various skeletal sites.

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  • Biomechanical indentation tests were performed on humeral heads and calcanei.

    • Main Results:

    • OVX goats showed significant decreases in BMD (24-33%) across multiple skeletal sites compared to SHAM controls.
    • Photodensitometry revealed continuous bone density reduction post-OVX.
    • Biomechanical testing demonstrated significant reductions (52-54%) in the energy required for bone displacement in OVX goats, correlating with BMD loss.

    Conclusions:

    • Ovariectomy combined with a low-calcium diet successfully induced significant osteopenia in goats.
    • This model exhibits compromised cancellous bone mechanical properties, closely mirroring human osteoporosis.
    • The established goat model is suitable for future osteoporosis research.