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Exploring the Two Herb Combination Strategy to Treat Injured PC12 Cells
Published on: November 18, 2022
Caffeic acid phenethyl ester (CAPE) protects PC12 cells from MPP+ toxicity by inducing the expression of
Neife Aparecida Guinaim dos Santos1, Nádia Maria Martins1, Roberto de Barros Silva1
1Department of Clinical Analyses, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
Abstract:
Neurite loss is an early event in neurodegenerative diseases; therefore, the regeneration of the network of neurites constitutes an interesting strategy of treatment for such disorders. Neurotrophic factors play a critical role in neuronal regeneration, but their clinical use is limited by their inability to cross the blood brain barrier. Oxidative and inflammatory events are implicated in neurodegeneration and antioxidant compounds have been suggested as potential neuroprotectors. The protective potential of CAPE (caffeic acid phenethyl ester) has been shown in different models of neurotoxicity (in vitro and in vivo) and it has been associated with immune-modulatory, antioxidant and anti-inflammatory properties; however, other mechanisms might be involved. The present study demonstrates that CAPE protects PC12 cells from the cellular death induced by the dopaminergic neurotoxin MPP(+) by increasing the network of neurites. Results showed that CAPE induced the formation, elongation and ramification of neurites in PC12 cells non-stimulated with NGF (nerve growth factor) and inhibited the shortage of neurites induced by the dopaminergic neurotoxin. These effects were associated with increased expression of neuron-typical proteins responsible for axonal growth (GAP-43) and synaptogenesis (synaptophysin and synapsin I). It is noteworthy that, unlike neurotrophins, CAPE would be able to cross the blood brain barrier and exert its neurotrophic effects in the brain. This study corroborates the therapeutic potential of CAPE in neurodegenerative diseases while proposes the involvement of neuroplasticity in the mechanism of neuroprotection.
Insights
Caffeic acid phenethyl ester (CAPE) promotes neurite regeneration in neurodegenerative disease models. Unlike neurotrophic factors, CAPE may cross the blood-brain barrier, offering a novel therapeutic strategy.
Area of Science:
- Neuroscience
- Neuroprotection
- Neuroregeneration
Background:
- Neurite loss is an early indicator of neurodegenerative diseases.
- Neurotrophic factors are crucial for neuronal regeneration but face challenges crossing the blood-brain barrier.
- Oxidative stress and inflammation contribute to neurodegeneration, suggesting antioxidant compounds as potential neuroprotectors.
Purpose of the Study:
- To investigate the neuroprotective and neurite-regenerating potential of caffeic acid phenethyl ester (CAPE).
- To explore CAPE's mechanism of action in protecting against dopaminergic neurotoxicity.
- To assess CAPE's ability to promote neurite network formation and elongation.
Main Methods:
- Utilized PC12 cells treated with the dopaminergic neurotoxin MPP+.
- Assessed the effects of CAPE on neurite formation, elongation, and ramification.
- Measured the expression of key proteins involved in axonal growth (GAP-43) and synaptogenesis (synaptophysin, synapsin I).
Main Results:
- CAPE significantly protected PC12 cells from MPP+-induced death by enhancing neurite network regeneration.
- CAPE stimulated neurite formation, elongation, and branching in non-stimulated PC12 cells.
- CAPE treatment increased the expression of GAP-43, synaptophysin, and synapsin I, indicating promotion of axonal growth and synaptogenesis.
Conclusions:
- CAPE demonstrates significant neuroprotective effects against dopaminergic neurotoxicity by promoting neurite network regeneration.
- The findings suggest CAPE may exert neurotrophic effects by crossing the blood-brain barrier, unlike traditional neurotrophic factors.
- This study supports the therapeutic potential of CAPE for neurodegenerative diseases, highlighting the role of neuroplasticity in its protective mechanism.
