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Insight Into the Molecular Dynamic Simulation Studies of Reactive Oxygen Species in Native Skin Membrane
In recent years, the role of reactive oxygen species (ROS) in regulating cancer cell apoptosis, inflammation, cell ischemia, and cell signaling pathways has been well established. The most common sources of intracellular ROS are the mitochondrial electron transport system, NADH oxidase, and cytochro...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Frontiers Media S.A.
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6030362/ https://www.ncbi.nlm.nih.gov/pubmed/29997501 http://dx.doi.org/10.3389/fphar.2018.00644 |
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author | Yadav, Dharmendra K. Kumar, Surendra Choi, Eun-Ha Sharma, Praveen Misra, Sanjeev Kim, Mi-Hyun |
author_facet | Yadav, Dharmendra K. Kumar, Surendra Choi, Eun-Ha Sharma, Praveen Misra, Sanjeev Kim, Mi-Hyun |
author_sort | Yadav, Dharmendra K. |
collection | PubMed |
description | In recent years, the role of reactive oxygen species (ROS) in regulating cancer cell apoptosis, inflammation, cell ischemia, and cell signaling pathways has been well established. The most common sources of intracellular ROS are the mitochondrial electron transport system, NADH oxidase, and cytochrome P450. In this study, we investigated the dynamics and permeability of ROS using molecular dynamics (MD) simulations on native skin-lipid bilayer membranes. Native skin-lipid bilayers are composed of ceramide, cholesterol, and free fatty acid in an almost equal molar ratio (1:1:1). Dynamic distribution studies on ROS, i.e., hydrogen peroxide (H(2)O(2)) and O(2) ((1)O(2) by analogy), revealed that these species interact with cholesterol as a primary target in lipid peroxidation of the skin-lipid bilayer. Moreover, the permeability of ROS, i.e., H(2)O(2), hydroxyl radicals (HO), hydroperoxy radical (HOO), and O(2), along the skin-lipid bilayer was measured using free energy profiles (FEPs). The FEPs showed that in spite of high-energy barriers, ROS traveled through the membrane easily. Breaching the free energy barriers, these ROS permeated into the membrane, inflicting oxidative stress, and causing apoptosis. Collectively, the insight acquired from simulations may result in a better understanding of oxidative stress at the atomic level. |
format | Online Article Text |
id | pubmed-6030362 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-60303622018-07-11 Insight Into the Molecular Dynamic Simulation Studies of Reactive Oxygen Species in Native Skin Membrane Yadav, Dharmendra K. Kumar, Surendra Choi, Eun-Ha Sharma, Praveen Misra, Sanjeev Kim, Mi-Hyun Front Pharmacol Pharmacology In recent years, the role of reactive oxygen species (ROS) in regulating cancer cell apoptosis, inflammation, cell ischemia, and cell signaling pathways has been well established. The most common sources of intracellular ROS are the mitochondrial electron transport system, NADH oxidase, and cytochrome P450. In this study, we investigated the dynamics and permeability of ROS using molecular dynamics (MD) simulations on native skin-lipid bilayer membranes. Native skin-lipid bilayers are composed of ceramide, cholesterol, and free fatty acid in an almost equal molar ratio (1:1:1). Dynamic distribution studies on ROS, i.e., hydrogen peroxide (H(2)O(2)) and O(2) ((1)O(2) by analogy), revealed that these species interact with cholesterol as a primary target in lipid peroxidation of the skin-lipid bilayer. Moreover, the permeability of ROS, i.e., H(2)O(2), hydroxyl radicals (HO), hydroperoxy radical (HOO), and O(2), along the skin-lipid bilayer was measured using free energy profiles (FEPs). The FEPs showed that in spite of high-energy barriers, ROS traveled through the membrane easily. Breaching the free energy barriers, these ROS permeated into the membrane, inflicting oxidative stress, and causing apoptosis. Collectively, the insight acquired from simulations may result in a better understanding of oxidative stress at the atomic level. Frontiers Media S.A. 2018-06-27 /pmc/articles/PMC6030362/ /pubmed/29997501 http://dx.doi.org/10.3389/fphar.2018.00644 Text en Copyright © 2018 Yadav, Kumar, Choi, Sharma, Misra and Kim. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Pharmacology Yadav, Dharmendra K. Kumar, Surendra Choi, Eun-Ha Sharma, Praveen Misra, Sanjeev Kim, Mi-Hyun Insight Into the Molecular Dynamic Simulation Studies of Reactive Oxygen Species in Native Skin Membrane |
title | Insight Into the Molecular Dynamic Simulation Studies of Reactive Oxygen Species in Native Skin Membrane |
title_full | Insight Into the Molecular Dynamic Simulation Studies of Reactive Oxygen Species in Native Skin Membrane |
title_fullStr | Insight Into the Molecular Dynamic Simulation Studies of Reactive Oxygen Species in Native Skin Membrane |
title_full_unstemmed | Insight Into the Molecular Dynamic Simulation Studies of Reactive Oxygen Species in Native Skin Membrane |
title_short | Insight Into the Molecular Dynamic Simulation Studies of Reactive Oxygen Species in Native Skin Membrane |
title_sort | insight into the molecular dynamic simulation studies of reactive oxygen species in native skin membrane |
topic | Pharmacology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6030362/ https://www.ncbi.nlm.nih.gov/pubmed/29997501 http://dx.doi.org/10.3389/fphar.2018.00644 |
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