Reduced renal allograft survival is related to low urinary N-acetyl-beta-D-glucosaminidase excretion during the first posttransplant month

Transplantation
P KotankoW Pfaller

Abstract

The excretion of urinary N-acetyl-beta-D-glucosaminidase (NAG) was measured daily between day 7 and day 28 in 33 renal allograft recipients enjoying an entirely uncomplicated first postoperative month. Graft status was evaluated after 4 and 6 years and related to NAG excretion. After 4 years, 6 patients had experienced graft loss due to chronic rejection. Posttransplant urinary NAG excretion in the group of patients with failing grafts was significantly lower (9.4 +/- 6.3 vs. 17.2 +/- 8.5 U/g urinary creatinine, P = 0.036). Univariant analysis of recipient and donor characteristics revealed urinary NAG excretion to be the only parameter significantly differing between the groups. After 6 years, a total of 8 patients had lost their grafts. The posttransplant urinary NAG excretion in this group was 10.8 +/- 6.2 U/g; in the 25 patients with functioning grafts NAG excretion was 17.4 +/- 8.8 U/g (P = 0.064). A very low urinary NAG excretion ( < 7 U/g) was seen in 5 patients and associated with poor graft survival after 4 and 6 years (odds ratios 12.5 (1.9-82.1) and 6.9 (1.1-44.8), respectively. Kaplan-Meier analysis showed a reduced graft survival in this subgroup (P = 0.031). Receiver operating characteristics (ROC) analysis demons...Continue Reading

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Sep 1, 2008·Expert Opinion on Medical Diagnostics·Sean M Bagshaw
Apr 19, 2011·American Journal of Kidney Diseases : the Official Journal of the National Kidney Foundation·Bertram L Kasiske
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