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The Hypoxic Ischemic Encephalopathy Model of Perinatal Ischemia
08:47

The Hypoxic Ischemic Encephalopathy Model of Perinatal Ischemia

Published on: November 19, 2008

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[USING CORTEXIN TO MANAGE THE CONSEQUENCES OF PERINATAL HYPOXIC BRAIN INJURY IN INFANT RATS]

S V Kuznetsov, N N Kuznetsova

    Zhurnal Evoliutsionnoi Biokhimii I Fiziologii
    |January 30, 2019
    PubMed

    Insights

    Cortexin showed transient improvements in physiological indicators following perinatal hypoxic-ischemic brain injury in infant rats. However, long-term benefits were not sustained, and it disrupted nervous system activity in healthy pups.

    Area of Science:

    • Neuroscience
    • Developmental Biology
    • Pharmacology

    Background:

    • Perinatal hypoxic-ischemic (HI) brain injury poses significant risks to central nervous system (CNS) development.
    • Investigating therapeutic interventions for neonatal brain injury is crucial for improving long-term outcomes.

    Purpose of the Study:

    • To evaluate the efficacy of the peptide preparation Cortexin in treating CNS pathological processes during perinatal ontogenesis.
    • To assess the physiological effects of Cortexin in a rat model of perinatal hypoxic-ischemic brain injury.

    Main Methods:

    • Induction of ischemic brain injury in 7-day-old rats via carotid artery ligation and hypoxia.
    • Administration of Cortexin (1 mg/kg daily for 10 days) or saline to experimental and control groups.
    • Monitoring of physiological indicators including electromyography (EMG), electrocardiography (ECG), respiration, and vagosympathetic balance at 10 and 30 days post-injury.

    Main Results:

    • Non-treated HI rats exhibited weight gain lag and altered EMG spectral structure compared to controls.
    • Cortexin treatment led to transient EMG spectral improvement at day 10, but not at day 30.
    • Vagosympathetic balance shifted towards parasympathetic influence at day 10 in both treated and non-treated rats; at day 30, Cortexin showed a positive effect while non-treated rats showed sympathetic dominance.
    • Cortexin administration to intact rats caused disturbances in vagosympathetic balance and heart rhythm.

    Conclusions:

    • Cortexin demonstrates a temporary positive effect on physiological parameters in infant rats with perinatal HI brain injury.
    • The long-term efficacy of Cortexin for this condition remains uncertain, with potential for nervous system disruption in healthy subjects.
    • Further research is needed to clarify Cortexin's therapeutic window and safety profile in neonatal brain injury.

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