Related Experiment Videos
Lipid composition of lymphocyte plasma membrane from pig mesenteric lymph node
The Biochemical Journal
|April 15, 1976
Summary
Pig lymph node lymphocyte plasma membranes are rich in neutral lipids and phospholipids. The purified membrane shows higher proportions of phospholipids, sphingomyelin, glycosphingolipids, and gangliosides compared to the homogenate.
Area of Science:
- Lipid biochemistry
- Cell membrane composition
- Immunology
Background:
- The plasma membrane is crucial for lymphocyte function.
- Understanding the lipid composition of lymphocyte plasma membranes provides insights into cellular processes.
Purpose of the Study:
- To characterize the lipid composition of pig mesenteric lymph-node lymphocyte plasma membranes.
- To compare the lipid profile of purified plasma membranes with the initial lymph-node homogenate.
Main Methods:
- Isolation and purification of plasma membrane fractions from pig mesenteric lymph-node lymphocytes.
- Lipid extraction and quantitative analysis of neutral lipids, phospholipids, glycosphingolipids, and gangliosides.
- Fatty acid analysis of specific lipid classes.
Main Results:
- Plasma membranes primarily contained neutral lipids and phospholipids (94%), with phospholipids being phosphatidylcholine.
- Purified membranes showed increased proportions of phospholipids (especially sphingomyelin), glycosphingolipids, and gangliosides compared to the homogenate.
- Specific fatty acid profiles were identified: palmitic acid in phosphatidylcholine, myristic acid in sphingomyelin and phosphatidylethanolamine, and oleic acid in glycosphingolipids.
Conclusions:
- Pig lymph node lymphocyte plasma membranes have a distinct lipid composition enriched in specific lipid classes.
- The lipid profile suggests specialized membrane functions related to cell signaling and structure.
- Fatty acid composition indicates specific roles for these lipids in membrane fluidity and integrity.