Evidence map›Paper›PMID 22169100›Full record

ArticleInvestigative ophthalmology & visual science2012

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

Douglas Borchman, Gary N Foulks, Marta C Yappert, Sarah E Milliner

Abstract readComparative Study
In one paragraph

Article in Investigative ophthalmology & visual science, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

36 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. Article
  4. Review
  5. Review
  6. Article
  7. Article
  8. Article
  9. Effects of Aging on Human Meibum.Investigative ophthalmology & visual science · 2021
    Article
  10. Article
  11. The Properties and Role ofThe Journal of organic chemistry · 2021
    Article
  12. Article
  13. Article
  14. Article
  15. Lipid Saturation and the Rheology of Human Tear Lipids.International journal of molecular sciences · 2019
    Article
  16. Article
  17. Article
  18. Article
  19. Effect of Refresh PlusClinical ophthalmology (Auckland, N.Z.) · 2019
    Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Douglas BorchmanDepartment of Ophthalmology and Visual Sciences, University of Louisville, Louisville, Kentucky, USA. borchman@louisville.edu
Gary N Foulks
Marta C Yappert
Sarah E Milliner

Funding

Lipids and the Human Tear FilmR01EY017094 · NEI · UNIVERSITY OF LOUISVILLE · PI FOULKS, GARY N · 2006 to 2010
$1.3M
NEI NIH HHS EY017094-01NEI NIH HHS R01 EY017094
6 · The paper itself

Abstract

purposeHuman 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.

resultsCompared 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.

conclusionsIt 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.

Indexed as

AgingAdolescentAdultAgedAged, 80 and overChildChild, PreschoolFemaleHumansInfantLipidsMagnetic Resonance SpectroscopyMaleMeibomian GlandsMiddle AgedYoung AdultLipids

Identifiers

PMID22169100
PMCPMC3292379

What OpenQuestion holds

Textmetadata
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.