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[Changes in the ultrastructure of the cerebral cortex in experimental chronic morphine poisoning and morphine
Abstract:
The ultrastructure of cortical neurons of rats was studied by electron microscopy in the dynamics of chronic morphine poisoning and discontinuation. Administrtion of monotonous (30 mg/kg) and increasing (from 30-480 mg/kg) doses of morphine followed by its discontinuation induced submicroscopic reconstruction of the endoplasmatic network and reactive changes in the neurons. It is suggested that impaired production of protein-synthesizing substances (endogenous polypeptide) points to an effect of morphine on the metabolic processes of neurons.
Insights
Chronic morphine use and discontinuation alter rat cortical neuron structure, affecting protein synthesis. This suggests morphine disrupts neuronal metabolic processes.
Area of Science:
- Neuroscience
- Cell Biology
- Pharmacology
Context:
- Investigating the effects of chronic morphine exposure on neuronal ultrastructure.
- Examining cellular changes during morphine withdrawal.
Purpose:
- To elucidate the submicroscopic alterations in rat cortical neurons due to chronic morphine administration and discontinuation.
- To understand the impact of morphine on neuronal endoplasmic reticulum and protein synthesis.
Summary:
- Electron microscopy revealed significant ultrastructural changes in rat cortical neurons following chronic morphine administration (both fixed and escalating doses) and subsequent discontinuation.
- These changes included alterations to the endoplasmic reticulum network and reactive neuronal modifications.
- Morphine's impact on the production of protein-synthesizing substances, specifically endogenous polypeptides, suggests a disruption of neuronal metabolic processes.
Impact:
- Provides insights into the cellular mechanisms underlying morphine addiction and withdrawal.
- Highlights the neurotoxic potential of chronic opioid use.
- Suggests potential targets for therapeutic interventions aimed at mitigating opioid-induced neuronal damage.