Neuropeptide Cycloprolylglycine Exhibits Neuroprotective Activity after Systemic Administration to Rats with Modeled Incomplete Global Ischemia and in In Vitro Modeled Glutamate Neurotoxicity
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We studied cerebroprotective properties of neuropeptide cycloprolylglycine (1 mg/kg) administered intraperitoneally to rats with modeled incomplete global ischemia rats and neuroprotective properties for HT-22 cells under conditions of glutamate toxicity. It was shown that the neuropeptide administered during the postischemic period restored the neurological status of rats by preventing sensorimotor impairments in the limb-placing test and suppression of locomotor activity in the open field test. In in vitro experiments, cycloprolylglycine in concentrations of 10–5-10–8 M exhibited pronounced dose-dependent neuroprotective activity. The results attest to high cerebro- and neuroprotective potential of endogenous peptide cycloprolylglycine.
Key Wordsneuropeptide cycloprolylglycine cerebroprotective activity neuroprotective activity incomplete global cerebral ischemia glutamate neurotoxicity
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