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PubMed · 14704487

Transition metal ions significantly decrease phospholipase C activity degrading phosphatidylinositol-4,5-bisphosphate in the brain cortex.

Agata Zambrzycka·Magdalena Cakała·Monika Kamińska
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Abstract

Highly reactive transition metals, such as copper and iron play an obligatory role in generating of reactive oxygen species (ROS). Many neurodegenerative diseases including Alzheimer's disease (AD) and Parkinson's disease (PD) show increased accumulation of these metals. Phosphoinositide metabolism is altered in neurodegenerative diseases. In the present study, we examined the effect of CuSO(4) and FeCl(2) on phospholipase C (PLC) activity degrading phosphatidylinositol-4,5-bisphosphate (PIP(2)) and phosphatidylinositol (PI) in synaptic plasma membranes (SPM) from the rat brain cortex. We report that 25 microM CuSO(4) and FeCl(2) decreased PIP(2)-PLC activity by 60% and 75%, respectively. However, both compounds had no effect on PI-PLC activity. These data indicated that exclusively PIP(2)-PLC is sensitive to transition metal ions. We suggest that chelators of these metals may protect brain against alteration of phosphoinositide metabolism and might be beneficial in the treatment of neurodegenerative diseases.

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AnimalsBiodegradation, EnvironmentalCerebral CortexCopper SulfateFerrous CompoundsIn Situ HybridizationIonsPhosphatidylinositol 4,5-DiphosphatePhosphatidylinositol PhosphatesRatsSignal TransductionSynaptic MembranesTransition ElementsType C PhospholipasesJournal Article

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Agata Zambrzycka, Magdalena Cakała, Monika Kamińska. Transition metal ions significantly decrease phospholipase C activity degrading phosphatidylinositol-4,5-bisphosphate in the brain cortex.. https://pubmed.ncbi.nlm.nih.gov/14704487/

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