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http://dx.doi.org/10.3904/kjim.2015.30.3.345

Plasma neutrophil gelatinase-associated lipocalin as a potential predictor of adverse renal outcomes in immunoglobulin A nephropathy  

Park, Ga-Young (Department of Internal Medicine, Kyungpook National University School of Medicine and Clinical Research Center for End Stage Renal Disease)
Yu, Chung-Hoon (Department of Internal Medicine, Kyungpook National University School of Medicine and Clinical Research Center for End Stage Renal Disease)
Kim, Jun-Seop (Department of Internal Medicine, Kyungpook National University School of Medicine and Clinical Research Center for End Stage Renal Disease)
Kang, Yun-Jeong (Department of Internal Medicine, Kyungpook National University School of Medicine and Clinical Research Center for End Stage Renal Disease)
Kwon, Owen (Department of Internal Medicine, Kyungpook National University School of Medicine and Clinical Research Center for End Stage Renal Disease)
Choi, Ji-Young (Department of Internal Medicine, Kyungpook National University School of Medicine and Clinical Research Center for End Stage Renal Disease)
Cho, Jang-Hee (Department of Internal Medicine, Kyungpook National University School of Medicine and Clinical Research Center for End Stage Renal Disease)
Kim, Chan-Duck (Department of Internal Medicine, Kyungpook National University School of Medicine and Clinical Research Center for End Stage Renal Disease)
Kim, Yong-Lim (Department of Internal Medicine, Kyungpook National University School of Medicine and Clinical Research Center for End Stage Renal Disease)
Park, Sun-Hee (Department of Internal Medicine, Kyungpook National University School of Medicine and Clinical Research Center for End Stage Renal Disease)
Publication Information
The Korean journal of internal medicine / v.30, no.3, 2015 , pp. 345-353 More about this Journal
Abstract
Background/Aims: Neutrophil gelatinase-associated lipocalin (NGAL) is a wellknown biomarker of acute kidney injury. We evaluated the value of plasma NGAL (pNGAL) as an independent predictor of prognosis in immunoglobulin A nephropathy (IgAN). Methods: In total, 91 patients with biopsy-proven IgAN at a single center were evaluated. pNGAL was measured using a commercial enzyme-linked immunosorbent assay kit (R&D Systems). Adverse renal outcome was defined as chronic kidney disease (CKD) stage 3 or above at the last follow-up. Pearson correlation coefficient and Cox regression were used for analyses. Results: The mean age of all patients (male:female, 48:43) was 35 years (range, 18 to 77). pNGAL ranged between 21.68 and 446.40 ng/mL (median, 123.97) and showed a correlation with age (r = 0.332, p = 0.001), creatinine (r = 0.336, p = 0.001), estimated glomerular filtration rate (r = -0.397, p < 0.001), uric acid (r = 0.289, p = 0.006), and the protein-to-creatinine ratio (r = 0.288, p = 0.006). During a mean follow-up period of 37.6 months, 11 patients (12.1%) had CKD stage 3 or above. In a multivariate Cox regression model, hypertension (hazard ratio [HR], 8.779; 95% confidence interval [CI], 1.526 to 50.496; p = 0.015), proteinuria > 1 g/day (HR, 5.184; 95% CI, 1.124 to 23.921; p = 0.035), and pNGAL (HR, 1.012; 95% CI, 1.003 to 1.022; p = 0.013) were independent predictors associated with adverse renal outcome. Conclusions: pNGAL showed strong correlations with other clinical prognostic factors and was also an independent predictor of adverse renal outcome. We suggest pNGAL as a potential predictor for prognosis in IgAN, while further studies are needed to confirm the clinical value.
Keywords
Glomerulonephritis, IGA; Neutrophil gelatinase-associated lipocalin; Prognosis; Renal insufficiency, chronic;
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