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Part 2: Cellular and Molecular Biology of the Peritoneum and Peritoneal Dialysis |
Gambro AB1 ; Analytical Chemistry,2 University of Lund; and University Hospital of Lund,3 Lund, Sweden
Correspondence to: M. Erixon, Gambro AB, Box 10101, S-220 10 Lund, Sweden. martin.erixon{at}gambro.com
Objective: Glucose degradation products (GDPs) are
important for the outcome of peritoneal dialysis (PD) treatment. The most
cytotoxic GDP found in conventionally manufactured fluids,
3,4-dideoxyglucosone-3-ene (3,4-DGE), may in addition be recruited from
3-deoxyglucosone (3-DG). What happens with the GDPs in the fluid infused into
patients during PD is not known. We investigated whether 3,4-DGE and 3-DG in
PD fluid can be found in plasma during treatment.
Design: Patients on PD were dialyzed with a
conventional PD fluid containing 43 µmol/L 3,4-DGE and 281 µmol/L 3-DG.
Parallel experiments were performed in rats and in vitro with human
plasma. The rats were dialyzed with a PD fluid containing 100 µmol/L
3,4-DGE and 200 µmol/L 3-DG.
Results: The 3,4-DGE concentration in the peritoneum
declined at a much higher rate during the dwell than did the 3-DG
concentration. However, 3,4-DGE was not detected in the plasma of patients or
of rats during dialysis. The 3-DG concentration in plasma peaked shortly after
infusion of fluid into the peritoneal cavity. The 3,4-DGE concentration during
experimental incubation in plasma declined rapidly; the 3-DG concentration
declined only 10% as rapidly (or less).
Conclusion: During dialysis, 3,4-DGE could not be
detected in plasma of either PD patients or rats, presumably because of its
high reactivity. On the other hand, 3-DG may pass through the membrane and be
detected in the blood.
KEY WORDS: Peritoneal dialysis fluid; glucose degradation products; 3,4-DGE; 3-DG; plasma; advanced glycation end-products.
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