Related Experiment Video
Updated: Jul 4, 2026
07:31
Realistic Membrane Modeling Using Complex Lipid Mixtures in Simulation Studies
Published on: September 1, 2023
Understanding and analyzing meibomian lipids--a review
Igor A Butovich1, Thomas J Millar, Bryan M Ham
1Department of Ophthalmology and Graduate School of Biomedical Sciences, University of Texas Southwestern Medical Center, Dallas, Texas, USA.
Current Eye Research
|June 24, 2008
Summary
This review details meibomian lipids, their analysis, and interactions within the tear film. It covers gland anatomy, lipid structures, and advanced analytical techniques for ocular surface research.
Area of Science:
- Ocular Surface Science
- Lipid Biochemistry
- Analytical Chemistry
Background:
- Meibomian glands produce lipids essential for tear film stability.
- Understanding meibomian lipids is crucial for diagnosing and treating ocular surface diseases.
- Current knowledge on meibomian lipid composition and function is evolving.
Purpose of the Study:
- To provide an overview of current knowledge on meibomian lipids.
- To discuss the methodologies for analyzing meibomian lipids.
- To highlight controversies and future research directions in the field.
Main Methods:
- Review of existing literature on meibomian gland anatomy and lipid composition.
- Description of lipid structures, nomenclature, and physicochemical properties.
- Evaluation of various sample collection, storage, and analytical techniques (GC, HPLC-MS/MS).
Main Results:
- Detailed description of meibomian gland anatomy and secretory control mechanisms.
- Presentation of meibomian gland structure in various species, including marsupials.
- Explanation of lipid structures and their impact on meibomian lipid properties.
- Comparison of analytical techniques for characterizing lipids in small samples.
Conclusions:
- Discussion of tear film lipids and their interaction with tear film proteins.
- Presentation of a new model for the outer layer of the tear film involving proteins.
- Identification of potential areas for future research in meibomian lipid and tear film dynamics.
More Related Videos
Related Concept Videos
01:35Asymmetric Lipid Bilayer
Biological membranes show uneven distribution of different types of lipids in the inner and outer layers, resulting in transverse asymmetric membranes. The treatment of the erythrocyte membrane with the enzyme phospholipase confirmed the asymmetric nature of the lipid bilayer. The enzyme hydrolyzes lipids into fatty acids and hydrophilic groups. The phospholipase acts only on the outer layer of the membrane, while the inner layer remains intact. The phospholipase treatment resulted in 80%...
01:38What are Lipids?
Overview
01:31What are Lipids?
Lipids function as structural components of cellular membranes, in addition to acting as energy reservoirs and signaling molecules. They are thus crucial to all living organisms. The three biologically important classes of lipids are triglycerides, phospholipids, and steroids.
Non-Polar and Hydrophobic Characteristics of Lipids
Lipids are a structurally and functionally diverse group of hydrocarbons—compounds consisting of carbon and hydrogen atoms. The carbon-carbon and carbon-hydrogen bonds...
Non-Polar and Hydrophobic Characteristics of Lipids
Lipids are a structurally and functionally diverse group of hydrocarbons—compounds consisting of carbon and hydrogen atoms. The carbon-carbon and carbon-hydrogen bonds...
01:32Membrane Lipids
Lipids are an essential component of all biological membranes. The average lipid content in mammalian membranes is 50%, though it can be as low as 20% in the inner mitochondrial membrane or as high as 80% in the myelin sheath present around the nerve cells.
Phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, and sphingomyelin are the most common phospholipids present in mammalian membranes. At physiological pH, phosphatidylserine is negatively charged, while the other three...
Phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, and sphingomyelin are the most common phospholipids present in mammalian membranes. At physiological pH, phosphatidylserine is negatively charged, while the other three...
01:32Membrane Lipids
Lipids are an essential component of all biological membranes. The average lipid content in mammalian membranes is 50%, though it can be as low as 20% in the inner mitochondrial membrane or as high as 80% in the myelin sheath present around the nerve cells.
Phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, and sphingomyelin are the most common phospholipids present in mammalian membranes. At physiological pH, phosphatidylserine is negatively charged, while the other three...
Phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, and sphingomyelin are the most common phospholipids present in mammalian membranes. At physiological pH, phosphatidylserine is negatively charged, while the other three...
01:29Biosynthesis of Lipids
Microbial membranes exhibit remarkable diversity in lipid composition, reflecting evolutionary adaptations to various environmental conditions. The three domains of life—Bacteria, Archaea, and Eukarya—synthesize membrane lipids through distinct biosynthetic pathways, leading to fundamental structural differences that impact membrane stability, function, and adaptability.Fatty Acid-Based Lipids in Bacteria and EukaryaBacteria and eukaryotes share a common fatty acid biosynthesis pathway, which...