Plasma non-esterified fatty acid response to dialysate acetate concentration during haemodialysis in humans.
We have inhibited the in vitro generation of non-esterified fatty acids in plasma samples taken during haemodialysis by cooling the samples rapidly, centrifuging and freezing within 5 min of sampling and completing the assay on the same day. The relationship of non-esterified fatty acid concentrations during haemodialysis to the acetate concentration of the dialysate and the profile of circulating lipase activities was studied. With this sample-handling protocol we found lower non-esterified fatty acid concentrations than reported in many other studies and the results suggest that, under normal conditions of haemodialysis, the circulating non-esterified fatty acid concentrations and the associated risk of unwanted side-effects may have been previously over-estimated due to artefactual in vitro sample lipolysis. We also showed that, at the end of dialysis, when circulating lipase activities were least, the non-esterified fatty acid concentrations were lower (P < 0.05) with an acetate dialysate containing 37 mmol/l acetate than with a bicarbonate dialysate containing 3 mmol/l acetate.
Jackson
J M
JM
Department of Renal and Metabolic Medicine, University of Southampton, St. Mary's Hospital, Portsmouth, UK.
Talbot
S T
ST
Lee
H A
HA
D000085:Acetates / Q000032:analysis / Q000494:pharmacology*; D015314:Dialysis Solutions / Q000032:analysis*; D005189:False Positive Reactions; D005230:Fatty Acids, Nonesterified / Q000097:blood*; D005615:Freezing; D006801:Humans; D007700:Kinetics; D008049:Lipase / Q000097:blood; D008066:Lipolysis; D006435:Renal Dialysis
D000085:Acetates; D015314:Dialysis Solutions; D005230:Fatty Acids, Nonesterified; D008049:Lipase