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Related Experiment Videos

Experimental thromboembolic stroke in cynomolgus monkey.

G Kito1, A Nishimura, T Susumu

  • 1Shin Nippon Biomedical Laboratories (SNBL) Ltd., 2438 Miyanoura, Yoshida, 891-1394, Kagoshima, Japan. kito@snbl.co.jp

Journal of Neuroscience Methods
|February 13, 2001
PubMed
Summary

Researchers developed a new experimental model for thromboembolic stroke using cynomolgus monkeys. This model accurately replicates human stroke symptoms and brain damage without invasive intracranial surgery.

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Area of Science:

  • Neuroscience
  • Cerebrovascular Research
  • Primate Models

Background:

  • Thromboembolic stroke is a leading cause of disability.
  • Current experimental models often require invasive intracranial surgery.
  • A non-surgical, reproducible model is needed for stroke research.

Purpose of the Study:

  • To establish a novel experimental model of thromboembolic stroke.
  • To induce stroke by embolizing the middle cerebral artery (MCA) in non-human primates.
  • To characterize the resulting neurological deficits and histopathological changes.

Main Methods:

  • Autologous blood clots were delivered to the MCA via the internal carotid artery in male cynomolgus monkeys.
  • Neurological deficit scores were assessed post-embolization.

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  • Cerebral infarcts were quantified using 2,3,5-triphenyltetrazolium chloride (TTC) staining.
  • Cerebral blood flow (CBF) was measured using positron emission tomography (PET).

    • Main Results:

    • Embolization induced contralateral hemiplegia, hypotonia, and incoordination.
    • Histopathology revealed lesions in the caudate nucleus, putamen, globus pallidus, and insular cortex.
    • PET imaging showed maximal reduction of CBF in the affected MCA territory.

    Conclusions:

    • This non-surgical model effectively replicates key features of human thromboembolic stroke.
    • The model demonstrates significant neurological dysfunction and localized brain damage.
    • It provides a valuable tool for investigating stroke pathophysiology and therapeutic interventions.