Cargando…

Carbon Nanotubes and Short Cytosine-Rich Telomeric DNA Oligomeres as Platforms for Controlled Release of Doxorubicin—A Molecular Dynamics Study

This work deals with molecular dynamics analysis of properties of systems composed of carbon nanotubes and short telomeric DNA strands able to fold into i-motif structures at slightly acidic pH conditions. The studies are focused on possible application of such constructs as pH-controlled drug deliv...

Descripción completa

Detalles Bibliográficos
Autores principales: Wolski, Pawel, Nieszporek, Krzysztof, Panczyk, Tomasz
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7279147/
https://www.ncbi.nlm.nih.gov/pubmed/32443891
http://dx.doi.org/10.3390/ijms21103619
_version_ 1783543490754379776
author Wolski, Pawel
Nieszporek, Krzysztof
Panczyk, Tomasz
author_facet Wolski, Pawel
Nieszporek, Krzysztof
Panczyk, Tomasz
author_sort Wolski, Pawel
collection PubMed
description This work deals with molecular dynamics analysis of properties of systems composed of carbon nanotubes and short telomeric DNA strands able to fold into i-motif structures at slightly acidic pH conditions. The studies are focused on possible application of such constructs as pH-controlled drug delivery and release systems. We study two different approaches. The first assumes that folding/unfolding property of these DNA strands might realize a gate closing/opening mechanism with carbon nanotube as a container for drug molecules. The second approach assumes that these DNA strands can modulate the drug intercalating property as a function of pH. As a model drug molecule we used doxorubicin. We found that the first approach is impossible to realize because doxorubicin is not effectively locked in the nanotube interior by DNA oligonuceotides. The second approach is more promising though direct drug release was not observed in unbiased molecular dynamics simulations. However, by applying detailed analysis of pair interaction energies, mobilities and potential of mean force we can show that doxorubicin can be released when the DNA strands fold into i-motifs. Carbon nanotube in that latter case acts mainly as a carrier for active phase which is composed of DNA fragments able to fold into noncanonical tetraplexes (i-motif).
format Online
Article
Text
id pubmed-7279147
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-72791472020-06-15 Carbon Nanotubes and Short Cytosine-Rich Telomeric DNA Oligomeres as Platforms for Controlled Release of Doxorubicin—A Molecular Dynamics Study Wolski, Pawel Nieszporek, Krzysztof Panczyk, Tomasz Int J Mol Sci Article This work deals with molecular dynamics analysis of properties of systems composed of carbon nanotubes and short telomeric DNA strands able to fold into i-motif structures at slightly acidic pH conditions. The studies are focused on possible application of such constructs as pH-controlled drug delivery and release systems. We study two different approaches. The first assumes that folding/unfolding property of these DNA strands might realize a gate closing/opening mechanism with carbon nanotube as a container for drug molecules. The second approach assumes that these DNA strands can modulate the drug intercalating property as a function of pH. As a model drug molecule we used doxorubicin. We found that the first approach is impossible to realize because doxorubicin is not effectively locked in the nanotube interior by DNA oligonuceotides. The second approach is more promising though direct drug release was not observed in unbiased molecular dynamics simulations. However, by applying detailed analysis of pair interaction energies, mobilities and potential of mean force we can show that doxorubicin can be released when the DNA strands fold into i-motifs. Carbon nanotube in that latter case acts mainly as a carrier for active phase which is composed of DNA fragments able to fold into noncanonical tetraplexes (i-motif). MDPI 2020-05-20 /pmc/articles/PMC7279147/ /pubmed/32443891 http://dx.doi.org/10.3390/ijms21103619 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wolski, Pawel
Nieszporek, Krzysztof
Panczyk, Tomasz
Carbon Nanotubes and Short Cytosine-Rich Telomeric DNA Oligomeres as Platforms for Controlled Release of Doxorubicin—A Molecular Dynamics Study
title Carbon Nanotubes and Short Cytosine-Rich Telomeric DNA Oligomeres as Platforms for Controlled Release of Doxorubicin—A Molecular Dynamics Study
title_full Carbon Nanotubes and Short Cytosine-Rich Telomeric DNA Oligomeres as Platforms for Controlled Release of Doxorubicin—A Molecular Dynamics Study
title_fullStr Carbon Nanotubes and Short Cytosine-Rich Telomeric DNA Oligomeres as Platforms for Controlled Release of Doxorubicin—A Molecular Dynamics Study
title_full_unstemmed Carbon Nanotubes and Short Cytosine-Rich Telomeric DNA Oligomeres as Platforms for Controlled Release of Doxorubicin—A Molecular Dynamics Study
title_short Carbon Nanotubes and Short Cytosine-Rich Telomeric DNA Oligomeres as Platforms for Controlled Release of Doxorubicin—A Molecular Dynamics Study
title_sort carbon nanotubes and short cytosine-rich telomeric dna oligomeres as platforms for controlled release of doxorubicin—a molecular dynamics study
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7279147/
https://www.ncbi.nlm.nih.gov/pubmed/32443891
http://dx.doi.org/10.3390/ijms21103619
work_keys_str_mv AT wolskipawel carbonnanotubesandshortcytosinerichtelomericdnaoligomeresasplatformsforcontrolledreleaseofdoxorubicinamoleculardynamicsstudy
AT nieszporekkrzysztof carbonnanotubesandshortcytosinerichtelomericdnaoligomeresasplatformsforcontrolledreleaseofdoxorubicinamoleculardynamicsstudy
AT panczyktomasz carbonnanotubesandshortcytosinerichtelomericdnaoligomeresasplatformsforcontrolledreleaseofdoxorubicinamoleculardynamicsstudy