| Meibomian gland phospholipids. | |
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MedLine Citation:
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PMID: 8670736 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The content of the meibomian gland lipid exprimate is known, but little is known about the phospholipids that comprise the glandular cells. The purpose of the present study is to identify and quantitate the phospholipid complement of the meibomian gland cells that produce the lipid secretion of meibomian oil and which is vital to tear film stability. Eyelids (n = 50) were excised from rabbits, and after surgical removal of surrounding tissues, the tarsal plates with and without expressing meibomian oil were extracted and phospholipids of the plates quantified by 31P nuclear magnetic resonance (NMR). Seventeen phospholipids were quantified from tarsal plates expressed of oil and tarsal plates containing meibomian oil: alkylacylphosphatidylcholine (AAPC), dihydrosphingomyelin (DHSM), dimethylphosphatidylethanolamine, diphosphatidylglycerol (cardiolipin), ethanolamine plasmalogen (EPLAS), lysoethanolamine plasmalogen, lysophosphatidylcholine, lysophosphatidylethanolamine, lysophosphatidylserine, phosphatidic acid, phosphatidylcholine (PC), phosphatidylethanolamine (PE), phosphatidylglycerol, phosphatidylinositol, phosphatidylserine, sphingomyelin (SM), sphingosylphosphorylcholine. The six zwitterionic and neutral phospholipids, DHSM, EPLAS, PE, SM, AAPC, and PC together comprise 79.5% of the total meibomian gland phospholipid profile (in meibomian oil this value is 84.2%). The zwitterionic and neutral phospholipids dominate meibomian gland phospholipid profiles. Since the meibomian gland cells undergo holocrine secretion and form the meibomian glad secretion, such a composition is consistent with the hypothesis that a chemically stable lamellar surfactant layer phospholipids bind non-polar meibomian oil to the aqueous layer of the tear film. |
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Authors:
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J V Greiner; T Glonek; D R Korb; C D Leahy |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Current eye research Volume: 15 ISSN: 0271-3683 ISO Abbreviation: Curr. Eye Res. Publication Date: 1996 Apr |
Date Detail:
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Created Date: 1996-10-21 Completed Date: 1996-10-21 Revised Date: 2003-11-14 |
Medline Journal Info:
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Nlm Unique ID: 8104312 Medline TA: Curr Eye Res Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 371-5 Citation Subset: IM |
Affiliation:
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Department of Ophthalmology, Harvard Medical School, Boston, MA, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Magnetic Resonance Spectroscopy Meibomian Glands / cytology, metabolism*, secretion Molecular Structure Phospholipids / analysis, chemistry, metabolism* Rabbits Tears / chemistry, metabolism |
| Chemical | |
Reg. No./Substance:
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0/Phospholipids |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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