Molecular dynamics study of uncharged bupivacaine enantiomers in phospholipid bilayers
To investigate the effects of the uncharged bupivacaine (BVC) on the properties of model membranes of 1-palmitoyl- 2-oleoyl-sn-glycero-3-phosphatidylcholine (POPC), we have performed a series of molecular dynamics simulations. A very particular characteristic of the local anesthetic BVC, that is bei...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2012 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/162029 |
| Acceso en línea: | http://hdl.handle.net/11336/162029 |
| Access Level: | acceso abierto |
| Palabra clave: | BUPIVACAINE LIPID BILAYER LOCAL ANESTHETICS MOLECULAR DYNAMICS https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
| Sumario: | To investigate the effects of the uncharged bupivacaine (BVC) on the properties of model membranes of 1-palmitoyl- 2-oleoyl-sn-glycero-3-phosphatidylcholine (POPC), we have performed a series of molecular dynamics simulations. A very particular characteristic of the local anesthetic BVC, that is being discuss in the recent literature, is that their enantiomers R-(þ) (R-BVC) and S-(À) (S-BVC) present different activities. In this way, we have studied both enantiomers in a POPC phospholipids bilayers at a high molar ratios [local anesthetic (LA):lipid of 1:3]. The simulations were able to capture important features of the BVC?phospholipid bilayer interactions: BVC molecules are found in the interior of the bilayer. The R-BVC enantiomerfollows a bimodal distribution with access to the water?lipid interface; while the S-BVC is found, in more uniformdistribution, at the hydrophobic region. A decrease in theacyl chain segment order parameters, SCD, compared to neatbilayers, is found. Furthermore, this behavior is morenoticeable for the R-BVC form. The found decrease in SCD isattributed to a larger accessible volume per lipid in the tailregion. Our results could help to understand the highertoxicity of this enantiomer. |
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