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Effects of Aging on Human Meibum
PURPOSE: The purpose of this study was to determine if aging affects meibum lipid composition in non-meibomian gland dysfunction (MGD)/non-dry eye (DE) population. Aging has been repeatedly linked to pathological changes in various tissues and organs, including the onset of MGD and DE, in a number o...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Association for Research in Vision and Ophthalmology
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8475279/ https://www.ncbi.nlm.nih.gov/pubmed/34546321 http://dx.doi.org/10.1167/iovs.62.12.23 |
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author | Butovich, Igor A. Suzuki, Tomo |
author_facet | Butovich, Igor A. Suzuki, Tomo |
author_sort | Butovich, Igor A. |
collection | PubMed |
description | PURPOSE: The purpose of this study was to determine if aging affects meibum lipid composition in non-meibomian gland dysfunction (MGD)/non-dry eye (DE) population. Aging has been repeatedly linked to pathological changes in various tissues and organs, including the onset of MGD and DE, in a number of clinical and population-wide surveys. Both conditions have been associated with abnormal meibum secretion and composition, among other factors. However, the chemical basis for such a connection has not been established yet. METHODS: To identify and characterize possible changes in the meibum and meibogenesis with aging, lipidomic analyses of meibum samples collected from human subjects of two age groups – young (29 ± 5 years, n = 21) and elderly (68 ± 7 years, n = 29) – with similar male to female ratios in each group were conducted. Intact lipid species from major lipid groups of meibum (such as wax esters, cholesteryl esters, free cholesterol, triacylglycerols, etc.) were compared using lipidome-wide untargeted (such as Principal Component Analysis) and targeted (such as Orthogonal Projections to Latent Structures Discriminant Analysis) approaches, along with focused analyses of specific lipid species in liquid-chromatography mass spectrometry (LC-MS) and tandem mass spectrometry (MS-MS) experiments. RESULTS: Extremely high similarities of meibum lipids in the two age groups were observed, with only minor changes in the individual lipid species. The magnitude of the intergroup variability for tested lipid species was comparable to the intragroup variability for the same meibum components. No statistically significant differences in the lipid esterification, elongation, and unsaturation patterns were observed. CONCLUSIONS: Chronological aging itself seems to have only minor effect on meibogenesis in healthy, non-MGD/non-DE subjects. |
format | Online Article Text |
id | pubmed-8475279 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | The Association for Research in Vision and Ophthalmology |
record_format | MEDLINE/PubMed |
spelling | pubmed-84752792021-10-08 Effects of Aging on Human Meibum Butovich, Igor A. Suzuki, Tomo Invest Ophthalmol Vis Sci Biochemistry and Molecular Biology PURPOSE: The purpose of this study was to determine if aging affects meibum lipid composition in non-meibomian gland dysfunction (MGD)/non-dry eye (DE) population. Aging has been repeatedly linked to pathological changes in various tissues and organs, including the onset of MGD and DE, in a number of clinical and population-wide surveys. Both conditions have been associated with abnormal meibum secretion and composition, among other factors. However, the chemical basis for such a connection has not been established yet. METHODS: To identify and characterize possible changes in the meibum and meibogenesis with aging, lipidomic analyses of meibum samples collected from human subjects of two age groups – young (29 ± 5 years, n = 21) and elderly (68 ± 7 years, n = 29) – with similar male to female ratios in each group were conducted. Intact lipid species from major lipid groups of meibum (such as wax esters, cholesteryl esters, free cholesterol, triacylglycerols, etc.) were compared using lipidome-wide untargeted (such as Principal Component Analysis) and targeted (such as Orthogonal Projections to Latent Structures Discriminant Analysis) approaches, along with focused analyses of specific lipid species in liquid-chromatography mass spectrometry (LC-MS) and tandem mass spectrometry (MS-MS) experiments. RESULTS: Extremely high similarities of meibum lipids in the two age groups were observed, with only minor changes in the individual lipid species. The magnitude of the intergroup variability for tested lipid species was comparable to the intragroup variability for the same meibum components. No statistically significant differences in the lipid esterification, elongation, and unsaturation patterns were observed. CONCLUSIONS: Chronological aging itself seems to have only minor effect on meibogenesis in healthy, non-MGD/non-DE subjects. The Association for Research in Vision and Ophthalmology 2021-09-21 /pmc/articles/PMC8475279/ /pubmed/34546321 http://dx.doi.org/10.1167/iovs.62.12.23 Text en Copyright 2021 The Authors https://creativecommons.org/licenses/by-nc-nd/4.0/This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. |
spellingShingle | Biochemistry and Molecular Biology Butovich, Igor A. Suzuki, Tomo Effects of Aging on Human Meibum |
title | Effects of Aging on Human Meibum |
title_full | Effects of Aging on Human Meibum |
title_fullStr | Effects of Aging on Human Meibum |
title_full_unstemmed | Effects of Aging on Human Meibum |
title_short | Effects of Aging on Human Meibum |
title_sort | effects of aging on human meibum |
topic | Biochemistry and Molecular Biology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8475279/ https://www.ncbi.nlm.nih.gov/pubmed/34546321 http://dx.doi.org/10.1167/iovs.62.12.23 |
work_keys_str_mv | AT butovichigora effectsofagingonhumanmeibum AT suzukitomo effectsofagingonhumanmeibum |