Cyclic change of fatty acid composition in meibum during the menstrual cycle

Tomo Suzuki, Satoshi Fujiwara, Shigeru Kinoshita, Igor A. Butovich

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

PURPOSE. To evaluate the fatty acid (FA) composition in the meibum of pre-and postmenopausal women and age-matched men. METHODS. This prospective study involved 24 healthy subjects; six premenopausal women in their 30s with a regular menstrual cycle (young-female [yF] group), six postmenopausal women in their 60s (elderly-female [eF] group), and 12 age-matched men (i.e., young-male [yM] and elderly-male [eM] groups, respectively). The menstrual cycle was divided into six phases (phase I–VI). Meibum was obtained from the meibomian gland orifices via a Daviel spoon, and its FA composition was then analyzed via gas chromatography mass spectrometry (GC-MS). Principal component analysis (PCA) was performed on the GC-MS results. RESULTS. The mean FA composition of all subjects was 40% saturated FAs (SFA) and 60% unsaturated FAs (UFAs). The PCA results of all groups indicated two categories (PC1 [77.5%] and PC2 [12.4%]); one consisting of yF-group samples of mainly phase II and III and the other consisting of the yF-group samples of the rest of the cycle, as well as from eF-group, yM-group, and eM-group samples. Each group had a distinctive nature. The FAs that most contributed to PC1 were C14:0,C16:0, and C18:0 in a positive correlation, and C18:1n9 in a negative correlation. CONCLUSIONS. FA composition noticeably changes during the menstrual cycle and is somewhat affected by sex and age. The ratio of SFAs (C16:0,C18:0) to mono-UFAs (C18:1n9) in the FA composition might have an impact on the lipid quality of meibum, thus suggesting alteration of its melting temperature and viscosity.

Original languageEnglish (US)
Pages (from-to)1724-1733
Number of pages10
JournalInvestigative Ophthalmology and Visual Science
Volume60
Issue number5
DOIs
StatePublished - Apr 2019

Keywords

  • Aging
  • Fatty acid
  • Meibomian gland
  • Meibomian gland dysfunction
  • Meibum
  • Menstrual cycle
  • Sex steroid hormones

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

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