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Surface Chemistry Interactions of Cationorm with Films by Human Meibum and Tear Film Compounds
Cationorm(®) (CN) cationic nanoemulsion was demonstrated to enhance tear film (TF) stability in vivo possibly via effects on tear film lipid layer (TFLL). Therefore the interactions of CN with human meibum (MGS) and TFLL in vitro and in vivo deserve special study. MGS and CN were spread at the air/w...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5536046/ https://www.ncbi.nlm.nih.gov/pubmed/28718823 http://dx.doi.org/10.3390/ijms18071558 |
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author | Georgiev, Georgi As. Yokoi, Norihiko Nencheva, Yana Peev, Nikola Daull, Philippe |
author_facet | Georgiev, Georgi As. Yokoi, Norihiko Nencheva, Yana Peev, Nikola Daull, Philippe |
author_sort | Georgiev, Georgi As. |
collection | PubMed |
description | Cationorm(®) (CN) cationic nanoemulsion was demonstrated to enhance tear film (TF) stability in vivo possibly via effects on tear film lipid layer (TFLL). Therefore the interactions of CN with human meibum (MGS) and TFLL in vitro and in vivo deserve special study. MGS and CN were spread at the air/water interface of a Langmuir surface balance to ensure a range of MGS/CN oil phase ratios: 20/1, 10/1, 5/1, 3/1, 2/1 and 1/1. The films capability to reorganize during dynamic area changes was evaluated via the surface pressure-area compression isotherms and step/relaxation dilatational rheology studies. Films structure was monitored with Brewster angle microscopy. CN/TFLL interactions at the ocular surface were monitored with non-contact specular microscopy. The in vitro studies of MGS/CN layers showed that (i) CN inclusion (at fixed MGS content) increased film elasticity and thickness and that (ii) CN can compensate for moderate meibum deficiency in MGS/CN films. In vivo CN mixed with TFLL in a manner similar to CN/MGS interactions in vitro, and resulted in enhanced thickness of TFLL. In vitro and in vivo data complement each other and facilitated the study of the composition-structure-function relationship that determines the impact of cationic nanoemulsions on TF. |
format | Online Article Text |
id | pubmed-5536046 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-55360462017-08-04 Surface Chemistry Interactions of Cationorm with Films by Human Meibum and Tear Film Compounds Georgiev, Georgi As. Yokoi, Norihiko Nencheva, Yana Peev, Nikola Daull, Philippe Int J Mol Sci Article Cationorm(®) (CN) cationic nanoemulsion was demonstrated to enhance tear film (TF) stability in vivo possibly via effects on tear film lipid layer (TFLL). Therefore the interactions of CN with human meibum (MGS) and TFLL in vitro and in vivo deserve special study. MGS and CN were spread at the air/water interface of a Langmuir surface balance to ensure a range of MGS/CN oil phase ratios: 20/1, 10/1, 5/1, 3/1, 2/1 and 1/1. The films capability to reorganize during dynamic area changes was evaluated via the surface pressure-area compression isotherms and step/relaxation dilatational rheology studies. Films structure was monitored with Brewster angle microscopy. CN/TFLL interactions at the ocular surface were monitored with non-contact specular microscopy. The in vitro studies of MGS/CN layers showed that (i) CN inclusion (at fixed MGS content) increased film elasticity and thickness and that (ii) CN can compensate for moderate meibum deficiency in MGS/CN films. In vivo CN mixed with TFLL in a manner similar to CN/MGS interactions in vitro, and resulted in enhanced thickness of TFLL. In vitro and in vivo data complement each other and facilitated the study of the composition-structure-function relationship that determines the impact of cationic nanoemulsions on TF. MDPI 2017-07-18 /pmc/articles/PMC5536046/ /pubmed/28718823 http://dx.doi.org/10.3390/ijms18071558 Text en © 2017 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 Georgiev, Georgi As. Yokoi, Norihiko Nencheva, Yana Peev, Nikola Daull, Philippe Surface Chemistry Interactions of Cationorm with Films by Human Meibum and Tear Film Compounds |
title | Surface Chemistry Interactions of Cationorm with Films by Human Meibum and Tear Film Compounds |
title_full | Surface Chemistry Interactions of Cationorm with Films by Human Meibum and Tear Film Compounds |
title_fullStr | Surface Chemistry Interactions of Cationorm with Films by Human Meibum and Tear Film Compounds |
title_full_unstemmed | Surface Chemistry Interactions of Cationorm with Films by Human Meibum and Tear Film Compounds |
title_short | Surface Chemistry Interactions of Cationorm with Films by Human Meibum and Tear Film Compounds |
title_sort | surface chemistry interactions of cationorm with films by human meibum and tear film compounds |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5536046/ https://www.ncbi.nlm.nih.gov/pubmed/28718823 http://dx.doi.org/10.3390/ijms18071558 |
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