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Related Experiment Videos

Nitrendipine prevents the decrease caused by chronic ethanol intake in the maintenance of tetanic long-term

T L Ripley1, H J Little

  • 1Department of Pharmacology, Medical School, Bristol, UK.

Experimental Brain Research
|January 1, 1995
PubMed
Summary
This summary is machine-generated.

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Chronic ethanol consumption impairs long-term potentiation (LTP) in the hippocampus. Co-administration of nitrendipine with ethanol in vivo partially reversed ethanol

Area of Science:

  • Neuroscience
  • Pharmacology
  • Neurobiology

Background:

  • Prolonged ethanol consumption is known to impair hippocampal long-term potentiation (LTP).
  • Dihydropyridine calcium channel antagonists, like nitrendipine, may mitigate some effects of chronic ethanol intake.
  • The study explores the neuroprotective potential of nitrendipine against ethanol-induced synaptic plasticity deficits.

Purpose of the Study:

  • To investigate the effects of concurrent in vivo administration of nitrendipine and ethanol on hippocampal LTP in mice.
  • To determine if nitrendipine can prevent or reverse ethanol-induced impairments in synaptic plasticity.
  • To assess the impact of this drug combination on different methods of inducing LTP.

Main Methods:

  • Mice received chronic ethanol and/or nitrendipine treatment in vivo.

Related Experiment Videos

  • Hippocampal slices were prepared from treated mice.
  • Long-term potentiation (LTP) was induced using tetanic stimulation or elevated extracellular calcium.
  • Population spike height potentiation was measured to assess synaptic plasticity.

    • Main Results:

    • Ethanol treatment alone showed a non-significant trend towards reduced potentiation with single tetanus.
    • Concurrent ethanol and nitrendipine administration significantly enhanced potentiation compared to ethanol alone with single tetanus.
    • Chronic ethanol significantly decreased LTP maintenance with dual tetanic stimuli, an effect abolished by nitrendipine.
    • Ethanol did not alter LTP induced by calcium increase, but co-administration with nitrendipine decreased it.

    Conclusions:

    • Nitrendipine may offer neuroprotection against certain ethanol-induced impairments in hippocampal synaptic plasticity.
    • The protective effect of nitrendipine appears dependent on the method used to induce LTP.
    • Further research is warranted to elucidate the precise mechanisms underlying nitrendipine's interaction with ethanol's effects on the hippocampus.