Ehrlich ascites tumor cell surface membranes: an abnormality in ether lipid content

Area of Science:

• Biochemistry
• Cell Biology
• Oncology

Background:

• Mammalian neoplasms often display altered ether lipid content, characterized by increased O-alkyl glyceryl ethers compared to normal tissues.
• The structural role of these lipids and their presence in tumor cell plasma membranes remain areas of investigation.

Purpose of the Study:

• To investigate the presence and quantity of O-alkyl lipids in the plasma membranes of Ehrlich ascites tumor cells.
• To determine if the O-alkyl lipid abnormality characteristic of neoplasms extends to the plasma membrane.

Main Methods:

• Isolation of Ehrlich ascites tumor cells using various methods.
• Analysis of lipid composition in isolated plasma membranes, microsomes, mitochondria, and whole cell homogenates.

Main Results:

• O-alkyl lipids were detected in Ehrlich ascites tumor cell plasma membranes.
• O-alkyl lipids constituted 1-3% of total phospholipids and 1-4% of total aliphatic lipids in these membranes.
• The concentration of O-alkyl lipids in tumor plasma membranes was found to be greater than that of alk-1-enyl lipids, consistent with neoplastic tissue patterns.

Conclusions:

• The O-alkyl lipid abnormality in neoplasms includes the plasma membrane of Ehrlich ascites tumor cells.
• These findings highlight significant differences in membrane lipid composition between neoplastic and normal mammalian tissues.