Lipids as endogenous Na, K-ATPase inhibitors in plasma of healthy individuals and in dialysis dependent patients Academic Article Article uri icon


MeSH Major

  • Cardiovascular Diseases
  • MicroRNAs


  • We assayed plasma Na,K-ATPase inhibitory activity due to total lipids and lipid fractions. The effect of dialysis on the Na,K-ATPase inhibitory activity was also studied. Plasma lipid extracts from 11 healthy volunteers and 9 dialysis-dependent patients (pre and post dialysis) were separated into neutral lipids and phospholipids. Further fractionation was by thin layer chromatography. These lipid fractions were analyzed for Na,K-ATPase inhibitory activity by displacement of [3H]-ouabain from hog brain Na,K-ATPase. Total inhibitory activity was significantly increased (p less than 0.001) in the post-dialysis plasma compared to pre-dialysis plasma of the same patient group and to controls (482, 85 and 78 nmol/L respectively; means of the groups in digoxin equivalents). The major inhibitory activity was associated with non-esterified fatty acids with modest contributions from four other lipid fractions. Our results show that endogenous lipids are major plasma Na,K-ATPase inhibitors in vitro under these assay conditions.

publication date

  • January 1989



  • Academic Article


Digital Object Identifier (DOI)

  • 10.1016/S0009-9120(89)80025-6

PubMed ID

  • 2550162

Additional Document Info

start page

  • 313

end page

  • 9


  • 22


  • 4