Lipid composition of the rat kidney.
The lipid fractions free fatty acids, triglycerides, cholesterol, cholesterol esters and phospholipids of rat kidney cortex, outer and inner medulla were analyzed by thin-layer chromatography. The concentrations of 23 individual fatty acids in the lipid fractions of each zone were determined by gas chromatography; 14 of them were evaluated by an analysis of variance. For most of the lipid fractions a corticomedullary concentration gradient was found, the highest concentrations occurring in the cortex. The lipid classes primarily determined the pattern of individual fatty acid concentrations. A significant concentration difference between the three zones only existed for 4 of 14 fatty acids. Long chain fatty acids were found in a higher concentration in the phospholipids of cortex and outer medulla (about 95%) in comparison to the inner medulla (65%).
D000818:Animals; D002784:Cholesterol / Q000032:analysis; D005227:Fatty Acids / Q000032:analysis; D007668:Kidney / Q000032:analysis*; D007672:Kidney Cortex / Q000032:analysis; D007679:Kidney Medulla / Q000032:analysis; D008055:Lipids / Q000032:analysis*; D008297:Male; D010743:Phospholipids / Q000032:analysis; D051381:Rats; D014280:Triglycerides / Q000032:analysis
D005227:Fatty Acids; D008055:Lipids; D010743:Phospholipids; D014280:Triglycerides; D002784:Cholesterol