Changes in human meibum lipid composition with age using nuclear magnetic resonance spectroscopy.

Abstract:

PURPOSE:Human tear film stability decreases with increasing age. In this study, the changes in meibum composition were measured in search of markers of tear film instability. METHODS:(1)H NMR nuclear magnetic resonance (NMR) spectra of 43 normal donors aged 1 to 88 years were acquired. RESULTS:Compared with meibum from adolescents and adults, meibum from infants and children contains less CH(3) and C═C groups and an increased aldehyde-to-lipid hydroperoxide ratio. CONCLUSIONS:It is reasonable that tear film stability is higher in infants than in adults. Their meibum contains less CH(3) and C═C groups and higher levels of protein, and as a result, the lipid is more ordered because of the tighter and stronger lipid-lipid interactions. For water to evaporate, it must first pass through the tight lipid-lipid barrier. For tears to break up, lipid-lipid interactions must be broken. It is reasonable that because the lipid-lipid interactions are stronger in infants' and children's tears compared with those of adolescents and adults, the tear film in the younger groups is more stable and provides a better barrier to evaporation than does the tear film of adults. Lipid saturation could be the critical feature in meibum that stabilizes tears in infants.

authors

Borchman D,Foulks GN,Yappert MC,Milliner SE

doi

10.1167/iovs.11-8341

subject

Has Abstract

pub_date

2012-01-31 00:00:00

pages

475-82

issue

1

eissn

0146-0404

issn

1552-5783

pii

iovs.11-8341

journal_volume

53

pub_type

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