Evidence map›Paper›PMID 24282231›Full record

ArticleInvestigative ophthalmology & visual science2014

Biophysical and morphological evaluation of human normal and dry eye meibum using hot stage polarized light microscopy.

Igor A Butovich, Hua Lu, Anne McMahon, Howard Ketelson, Michelle Senchyna, David Meadows, Elaine Campbell, Mike Molai, Emily Linsenbardt

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in Investigative ophthalmology & visual science, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed
3.6field-weighted citation impact, top 8% of its field
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, 61 citations in OpenAlex.

  1. Trial
  2. Article
  3. Article
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  5. Article
  6. Article
  7. Article
  8. High Resolution Images of Human Meibum Spread on Saline.Investigative ophthalmology & visual science · 2024
    Article
  9. Article
  10. Article
  11. Meibomian Gland Dysfunction Clinical Practice Guidelines.Japanese journal of ophthalmology · 2023
    Article
  12. Article
  13. Article
  14. Physiological effects of inactivation and the roles of Elovl3/ELOVL3 in maintaining ocular homeostasis.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2021
    Article
  15. Review
  16. Article
  17. Article
  18. Article
  19. Article
  20. On the pivotal role ofFASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2019
    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

9 authors at 2 institutions in 1 country.

Igor A ButovichDepartment of Ophthalmology, University of Texas Southwestern Medical Center, Dallas, Texas.
Hua Lu
Anne McMahon
Howard Ketelson
Michelle Senchyna
David Meadows
Elaine Campbell
Mike Molai
Emily Linsenbardt
The University of Texas Southwestern Medical Center · USAlcon (United States) · US

Funding

Core Grant for Vision ResearchP30EY020799 · NEI · UT SOUTHWESTERN MEDICAL CENTER · PI NIEDERKORN, JERRY · 2010 to 2016
$4.1M
Biochemistry and Biophysics of the Preocular Tear FilmR01EY019480 · NEI · UT SOUTHWESTERN MEDICAL CENTER · PI BUTOVICH, IGOR A · 2010 to 2014
$1.7M
NEI NIH HHS EY020799NEI NIH HHS P30 EY020799NEI NIH HHS R01 EY019480NEI NIH HHS R01EY019480
6 · The paper itself

Abstract

purposeTo study melting characteristics and the morphology of human and mouse meibum.

methodsHot stage cross-polarized light microscopy (HSPM) and immunohistochemical approaches were used.

resultsIsolated human meibum, and meibum of mice (either isolated or within the meibomian ducts of mice), were found to be in liquid-crystal state at physiological temperatures. Melting of both types of meibum started at approximately 10°C and was completed at approximately 40°C. Melting curves of isolated meibum and meibum inside the meibomian ducts were multiphasic with at least two or three clearly defined phase transition temperatures, typically at approximately 12 ± 2°C (minor transition), 21 ± 3°C, and 32 ± 3°C, regardless the source of meibum. Melting was highly cooperative in nature. Samples of abnormal human meibum collected from dry eye patients with meibomian gland dysfunction often showed an increased presence of nonlipid, nonmelting, nonbirefringent, chloroform-insoluble inclusions of a protein nature. The inclusions were positively stained for cytokeratins. The presence of these inclusions was semiquantitatively characterized using a newly proposed 0 to 4 scale. In the presence of large amounts of these inclusions, melting characteristics of meibum and its structural integrity were altered.

conclusionsHSPM is an effective tool that is suitable for biophysical and morphological evaluation of meibum. Morphological properties and melting characteristics of human meibum were found to be similar to those of mice. Abnormal meibum of many dry eye patients contained large quantities of nonlipid, protein-like inclusions, which were routinely absent in meibum of normal controls.

Indexed as

AdultAnimalsDry Eye SyndromesFemaleHumansImmunohistochemistryLipid MetabolismLipidsMaleMeibomian GlandsMiceMicroscopy, PolarizationTearsLipidsbiophysicshot stage polarized light microscopylipidsmeibomian glandsphase transitionsrheology

Identifiers

PMID24282231
PMCPMC3885138
OpenAlexW1968216323

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.