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Investigating the Cocaine-induced Reduction of Potassium Current on the Generation of Action Potentials Using a Computational Model

INTRODUCTION: Drugs of abuse, such as cocaine, affect different brain regions and lead to pathological memories. These abnormal memories may occur due to changes in synaptic transmissions or variations in synaptic properties of neurons. It has been shown that cocaine inhibits delayed rectifying pota...

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Autores principales: Borjkhani, Hadi, Borjkhani, Mehdi, Sharif, Morteza A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Iranian Neuroscience Society 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9790104/
https://www.ncbi.nlm.nih.gov/pubmed/36589017
http://dx.doi.org/10.32598/bcn.2021.1150.2
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author Borjkhani, Hadi
Borjkhani, Mehdi
Sharif, Morteza A.
author_facet Borjkhani, Hadi
Borjkhani, Mehdi
Sharif, Morteza A.
author_sort Borjkhani, Hadi
collection PubMed
description INTRODUCTION: Drugs of abuse, such as cocaine, affect different brain regions and lead to pathological memories. These abnormal memories may occur due to changes in synaptic transmissions or variations in synaptic properties of neurons. It has been shown that cocaine inhibits delayed rectifying potassium currents in affected brain regions and can create pathological memories. This study investigates how the change in the conductance of delayed rectifying potassium channels can affect the produced action potentials using a computational model. METHODS: We present a computational model with different channels and receptors, including sodium, potassium, calcium, NMDARs, and AMPARs, which can produce burst-type action potentials. In the simulations, by changing the delayed rectifying potassium conductance bifurcation diagram is calculated. RESULTS: By decreasing the potassium current for a fixed stimulatory signal, burst-type action potentials can be generated. In the following and with a further reduction of potassium conductance, produced action potentials exhibit non-linear and even chaotic behaviors. CONCLUSION: Results show that for a specific range of potassium conductance, a chaotic regime emerges in produced action potentials. These chaotic oscillations may play a role in inducing abnormal memories. HIGHLIGHTS: Cocaine consumption reduces the potassium current in affected cells. Decreasing the potassium currents elicits burst action potentials. Produced bursts might have chaotic behaviors. Chaotic oscillations might be related to the toxic effects of cocaine. PLAIN LANGUAGE SUMMARY: Drugs of abuse such as cocaine can manipulate brain circuits and may form some pathological memories. These memories can lead to long-term addiction. Furthermore, these drugs also can have toxic effects on the cells. Researchers are looking for the mechanisms that can lead to abnormal memories and toxic effects of drugs. It seems that an efficient mechanism that can be used by drugs of abuse is the manipulation of potassium currents in the affected cells. Here, in a computational model, we have shown that changes in the conductance of delayed rectifying potassium channels can lead to nonlinear and even chaotic behaviors in the produced action potentials. These behaviors might have a role in drug toxic effects.
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spelling pubmed-97901042022-12-29 Investigating the Cocaine-induced Reduction of Potassium Current on the Generation of Action Potentials Using a Computational Model Borjkhani, Hadi Borjkhani, Mehdi Sharif, Morteza A. Basic Clin Neurosci Research Paper INTRODUCTION: Drugs of abuse, such as cocaine, affect different brain regions and lead to pathological memories. These abnormal memories may occur due to changes in synaptic transmissions or variations in synaptic properties of neurons. It has been shown that cocaine inhibits delayed rectifying potassium currents in affected brain regions and can create pathological memories. This study investigates how the change in the conductance of delayed rectifying potassium channels can affect the produced action potentials using a computational model. METHODS: We present a computational model with different channels and receptors, including sodium, potassium, calcium, NMDARs, and AMPARs, which can produce burst-type action potentials. In the simulations, by changing the delayed rectifying potassium conductance bifurcation diagram is calculated. RESULTS: By decreasing the potassium current for a fixed stimulatory signal, burst-type action potentials can be generated. In the following and with a further reduction of potassium conductance, produced action potentials exhibit non-linear and even chaotic behaviors. CONCLUSION: Results show that for a specific range of potassium conductance, a chaotic regime emerges in produced action potentials. These chaotic oscillations may play a role in inducing abnormal memories. HIGHLIGHTS: Cocaine consumption reduces the potassium current in affected cells. Decreasing the potassium currents elicits burst action potentials. Produced bursts might have chaotic behaviors. Chaotic oscillations might be related to the toxic effects of cocaine. PLAIN LANGUAGE SUMMARY: Drugs of abuse such as cocaine can manipulate brain circuits and may form some pathological memories. These memories can lead to long-term addiction. Furthermore, these drugs also can have toxic effects on the cells. Researchers are looking for the mechanisms that can lead to abnormal memories and toxic effects of drugs. It seems that an efficient mechanism that can be used by drugs of abuse is the manipulation of potassium currents in the affected cells. Here, in a computational model, we have shown that changes in the conductance of delayed rectifying potassium channels can lead to nonlinear and even chaotic behaviors in the produced action potentials. These behaviors might have a role in drug toxic effects. Iranian Neuroscience Society 2022 2022-01-01 /pmc/articles/PMC9790104/ /pubmed/36589017 http://dx.doi.org/10.32598/bcn.2021.1150.2 Text en Copyright© 2022 Iranian Neuroscience Society https://creativecommons.org/licenses/by-nc/4.0/This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/ (https://creativecommons.org/licenses/by-nc/4.0/)
spellingShingle Research Paper
Borjkhani, Hadi
Borjkhani, Mehdi
Sharif, Morteza A.
Investigating the Cocaine-induced Reduction of Potassium Current on the Generation of Action Potentials Using a Computational Model
title Investigating the Cocaine-induced Reduction of Potassium Current on the Generation of Action Potentials Using a Computational Model
title_full Investigating the Cocaine-induced Reduction of Potassium Current on the Generation of Action Potentials Using a Computational Model
title_fullStr Investigating the Cocaine-induced Reduction of Potassium Current on the Generation of Action Potentials Using a Computational Model
title_full_unstemmed Investigating the Cocaine-induced Reduction of Potassium Current on the Generation of Action Potentials Using a Computational Model
title_short Investigating the Cocaine-induced Reduction of Potassium Current on the Generation of Action Potentials Using a Computational Model
title_sort investigating the cocaine-induced reduction of potassium current on the generation of action potentials using a computational model
topic Research Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9790104/
https://www.ncbi.nlm.nih.gov/pubmed/36589017
http://dx.doi.org/10.32598/bcn.2021.1150.2
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