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Related Experiment Videos

Nucleus basalis magnocellularis lesions decrease histochemically reactive zinc stores in the rat brain: effect of

F Amenta1, E Bronzetti, A Ricci

  • 1Istituto di Farmacologia, Università di Camerino, Italy.

European Journal of Histochemistry : EJH
|January 1, 1995
PubMed
Summary

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Unilateral lesions of the nucleus basalis magnocellularis (NBM) in rats decreased brain zinc stores. Choline alphoscerate treatment partially restored these zinc stores, suggesting a therapeutic potential for NBM-related cognitive decline.

Area of Science:

  • Neuroscience
  • Histochemistry
  • Neuropharmacology

Background:

  • Vesicular zinc stores are concentrated in specific brain regions, including the cerebral cortex and hippocampus.
  • These zinc stores are implicated in cognitive and mnemonic functions.
  • The nucleus basalis magnocellularis (NBM) plays a crucial role in cholinergic pathways influencing cognition.

Purpose of the Study:

  • To investigate the impact of nucleus basalis magnocellularis (NBM) lesions on histochemically reactive vesicular zinc stores in the rat brain.
  • To evaluate the efficacy of choline alphoscerate treatment in mitigating the effects of NBM lesions on zinc distribution.
  • To explore the relationship between NBM function, zinc stores, and cognitive processes.

Main Methods:

  • Monolateral lesioning of the nucleus basalis magnocellularis (NBM) in adult rats.

Related Experiment Videos

  • Assessment of histochemically reactive vesicular zinc stores using the sulphide-silver technique.
  • Quantitative analysis of sulphide-silver positive fibres in the fronto-parietal cortex and hippocampus.
  • Administration of choline alphoscerate treatment to assess its restorative effects.

    • Main Results:

    • Unilateral NBM lesions significantly reduced sulphide-silver positive fibres in the ipsilateral fronto-parietal cortex and hippocampus.
    • These reductions in zinc-containing fibres were observed starting from the 3rd-4th week post-lesioning.
    • Choline alphoscerate treatment partially restored the density and pattern of these fibres in both cortical and hippocampal regions.
    • The observed decrease in zinc stores mirrors findings in Alzheimer's disease patients.

    Conclusions:

    • Lesions of the NBM lead to a significant depletion of vesicular zinc stores in the rat brain, particularly in areas relevant to cognitive function.
    • Choline alphoscerate demonstrates a capacity to counteract the reduction in brain zinc stores induced by NBM lesions.
    • These findings suggest a potential therapeutic role for choline alphoscerate in conditions characterized by NBM dysfunction and associated cognitive impairments.