title: Association of meibum oleic acid with meibomian seborrhea.
abstract: OBJECTIVE
  We sought to determine whether patient meibum fatty acid unsaturation is associated with meibomian gland secretion consistency.
  
  
  METHODS
  Meibomian gland secretions were dissolved in chloroform and separated into lipid classes by thin-layer chromatography. Fatty acids in individual lipid classes were characterized by gas chromatography after transmethylation.
  
  
  RESULTS
  Meibum from patients with meibomian seborrhea was higher, and meibum from patients with meibomian keratoconjunctivitis (meibomianitis) was lower in the monounsaturated fatty acid, oleic acid, than that of other disease groups and normal subjects.
  
  
  CONCLUSIONS
  Our results strongly suggest that the melting characteristics of meibum, influenced primarily by the amount of oleic acid in wax and sterol esters and free fatty acids, greatly influence the consistency of meibomian gland secretions.
authors.affiliation: Department of Ophthalmology, The University of Texas, Southwestern Medical Center at Dallas, 75235-9057, USA. wshine@mednet.swmed.edu
authors.forename: W E
authors.initials: WE
authors.lastname: Shine
authors.forename: J P
authors.initials: JP
authors.lastname: McCulley
mesh_terms: D001762:Blepharitis / Q000378:metabolism*; D002851:Chromatography, High Pressure Liquid; D012628:Dermatitis, Seborrheic / Q000378:metabolism*; D006801:Humans; D050356:Lipid Metabolism; D008537:Meibomian Glands / Q000378:metabolism*; D019301:Oleic Acid / Q000378:metabolism*; D012625:Sebaceous Gland Diseases / Q000378:metabolism*; D013261:Sterols / Q000032:analysis
chemical_list: D013261:Sterols; D019301:Oleic Acid