PMID- 14981598 OWN - NLM STAT- MEDLINE DCOM- 20040513 LR - 20220410 IS - 1523-6838 (Electronic) IS - 0272-6386 (Linking) VI - 43 IP - 3 DP - 2004 Mar TI - Urinary interleukin-18 is a marker of human acute tubular necrosis. PG - 405-14 AB - BACKGROUND: Interleukin-18 (IL-18) is a mediator of ischemic acute tubular necrosis (ATN) in mice. METHODS: IL-18 was measured in human urine to determine whether it might serve as a marker of ATN. Seventy-two patients, including healthy controls, patients with different forms of acute renal failure, and patients with other renal diseases, were studied. RESULTS: Patients with ATN had significantly greater median urinary IL-18 concentrations than those with all other conditions: patients with ATN, 644 pg/mg creatinine (mean, 814 +/- 151 [SE] pg/mg creatinine; P <0.0001) versus healthy controls, 16 pg/mg creatinine (mean, 23 +/- 9 pg/mg creatinine); patients with prerenal azotemia, 63 pg/mg creatinine (mean, 155 +/- 68 pg/mg creatinine); patients with urinary tract infection, 63 pg/mg creatinine (mean, 149 +/- 110 pg/mg creatinine); those with chronic renal insufficiency, 12 pg/mg creatinine (mean, 84 +/- 45 pg/mg creatinine); and patients with nephrotic syndrome, 34 pg/mg creatinine (mean, 67 +/- 47 pg/mg creatinine). Median urinary IL-18 concentrations measured in the first 24 hours after kidney transplantation were 924 pg/mg creatinine (mean, 1,199 +/- 187 pg/mg creatinine) in patients who received a cadaveric kidney that developed delayed graft function compared with 171 pg/mg creatinine (mean, 367 +/- 102 pg/mg creatinine) in patients who received a cadaveric kidney with prompt graft function and 73 pg/mg creatinine (mean, 176 +/- 107 pg/mg creatinine) in patients who received a kidney with prompt graft function from a living donor (P <0.002). In kidney transplant recipients, lower urinary IL-18 levels were associated with a steeper decline in serum creatinine concentrations postoperative days 0 to 4 (P = 0.009). CONCLUSION: IL-18 levels are elevated in urine in patients with ATN and delayed graft function compared with other renal diseases. Urinary IL-18 may serve as a marker for proximal tubular injury in ATN. The clinical application of this test may be substantial because it is reliable, inexpensive, and easy to perform. FAU - Parikh, Chirag R AU - Parikh CR AD - Department of Medicine, University of Colorado School of Medicine, Denver, CO 80262, USA. FAU - Jani, Alkesh AU - Jani A FAU - Melnikov, Vyacheslav Y AU - Melnikov VY FAU - Faubel, Sarah AU - Faubel S FAU - Edelstein, Charles L AU - Edelstein CL LA - eng GR - 1R01-DK56851/DK/NIDDK NIH HHS/United States GR - K23-DK064689-01/DK/NIDDK NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Am J Kidney Dis JT - American journal of kidney diseases : the official journal of the National Kidney Foundation JID - 8110075 RN - 0 (Biomarkers) RN - 0 (Interleukin-18) SB - IM MH - Adult MH - Aged MH - Biomarkers/urine MH - Enzyme-Linked Immunosorbent Assay MH - Female MH - Humans MH - Interleukin-18/*urine MH - Kidney Diseases/urine MH - Kidney Tubular Necrosis, Acute/*urine MH - Male MH - Middle Aged EDAT- 2004/02/26 05:00 MHDA- 2004/05/14 05:00 CRDT- 2004/02/26 05:00 PHST- 2004/02/26 05:00 [pubmed] PHST- 2004/05/14 05:00 [medline] PHST- 2004/02/26 05:00 [entrez] AID - S0272638603014999 [pii] AID - 10.1053/j.ajkd.2003.10.040 [doi] PST - ppublish SO - Am J Kidney Dis. 2004 Mar;43(3):405-14. doi: 10.1053/j.ajkd.2003.10.040.