The effects of haloperidol on synaptic patterns in the rat striatum

Area of Science:

• Neuroscience
• Pharmacology
• Cell Biology

Background:

• Haloperidol is a typical antipsychotic drug used to treat psychosis.
• Its long-term effects on neuronal morphology in the corpus striatum are not fully understood.

Purpose of the Study:

• To investigate the morphometric changes in the corpus striatum of rats after chronic haloperidol administration.
• To analyze neuronal size, dendritic caliber, and axon terminal characteristics at the light and electron microscopic levels.

Main Methods:

• Morphometric analysis of the corpus striatum in rats.
• Light and electron microscopy techniques were employed.
• Quantitative assessment of neuronal density, neuronal size, dendrite caliber, and axon terminal size distribution.

Main Results:

• No significant change in striatal neuron density was observed.
• A 13% increase in neuronal size was noted in haloperidol-treated rats.
• A trend towards larger dendrite calibres and a shift in axon terminal size distribution (12% increase) were found.

Conclusions:

• Chronic haloperidol treatment induces subtle neuroplastic changes in the rat corpus striatum.
• These structural alterations, including increased neuronal and axon terminal size, may underlie the drug's therapeutic effects or side effects.