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Global brain ischemia: a reproducible monkey model.

E M Nemoto, A L Bleyaert, S W Stezoski

    Stroke
    |September 1, 1977
    PubMed
    Summary
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    Researchers created a monkey model for global brain ischemia (GBI) using a 16-minute duration. This model allows testing new therapies for severe, permanent neurological deficits and long-term survival after brain injury.

    Area of Science:

    • Neuroscience
    • Neurology
    • Ischemic Stroke Research

    Background:

    • Global brain ischemia (GBI) poses significant challenges in modeling permanent neurological deficits.
    • Developing reliable animal models is crucial for understanding GBI pathophysiology and testing therapeutic interventions.

    Purpose of the Study:

    • To establish a reproducible monkey model of 16-minute global brain ischemia (GBI).
    • To enable long-term survival and assessment of neurological deficits and histopathological changes following GBI.
    • To provide a platform for evaluating the efficacy of potential therapies for GBI.

    Main Methods:

    • Induction of 16-minute GBI in a monkey model.
    • Standardized intensive care with 24-hour trained personnel support for postischemic survival.

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  • Quantification of neurological deficit (ND) and comprehensive brain histopathological examinations.

    • Main Results:

    • 16-minute GBI induced severe, permanent neurological deficits with 7-day survival.
    • Histopathology revealed cortical lesions (occipital, frontal, temporal) and brainstem damage (oculomotor nuclei, medial longitudinal fasciculus).
    • Shorter (15-minute) GBI led to rapid recovery, while longer (20-minute) GBI resulted in mortality.

    Conclusions:

    • The developed 16-minute GBI monkey model reliably reproduces severe neurological deficits and allows for long-term survival.
    • This model is suitable for evaluating therapeutic interventions targeting GBI-induced brain damage.
    • The model demonstrates specific patterns of cortical and brainstem lesions characteristic of prolonged global ischemia.