Korean Journal of Clinical Laboratory Science (대한임상검사과학회지)

Korean Society for Clinical Laboratory Science (대한임상검사과학회)
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Usefulness of the Neutrophil Gelatinase-Associated Lipocalin (NGAL) Kit for Acute Kidney Injury Patients at the Emergency Medical Center in Daegu

대구지역 응급의료센터에 내원한 급성 콩팥손상 환자의 진단을 위한 호중구 젤라티나제 관련 리포칼린 키트의 유용성

  • Lee, Seung-Jin (Department of Laboratory Medicine, Daegu Catholic University Medical Center) ;
  • Park, Sangwook (Department of Biomedical Laboratory Science, College of Health, Kyungwoon University)
  • 이승진 (대구가톨릭대학교병원 진단검사의학과) ;
  • 박상욱 (경운대학교 보건대학 임상병리학과)
  • Received : 2016.02.06
  • Accepted : 2016.03.21
  • Published : 2016.06.30
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Abstract

Acute kidney injury (AKI) is a common syndrome resulting in kidney damage and malfunction within a few days or even a few hours. The diagnosis of AKI depends on routine biochemical tests, including serum creatinine, aspartate aminotransferase (AST), alanine aminotransaminase (ALT), blood urea nitrogen (BUN), and electrolytes. Plasma neutrophil gelatinase-associated lipocalin (NGAL) is a biomarker that shows correlation with the severity of acute infections and kidney injuries. The predictive value in other conventional assays for kidney functions has been reported to cause distraction for AKI syndrome. The aim of this study is to verify the predictive value of plasma NGAL in patients with established AKI. The NGAL kit for checkup demonstrates sensitivity of ${\geq}300$ (92.2%), ${\geq}200$ (95.6%), ${\geq}100$ (99.6%), specificity of ${\geq}300$ (95.1%), ${\geq}200$ (97.3%), ${\geq}100$ (99.4%), positive predictability of ${\geq}300$ (93.3%), ${\geq}200$ (93.4%), ${\geq}100$ (99.2%), and negative predictability of ${\geq}300$ (96.7%), ${\geq}200$ (97.7%), ${\geq}100$ (98.1%), respectively. The plasma NGAL compared with the enzyme-linked immunosorbent assay (ELISA) has been shown to be an early predictive biomarker of AKI. The NGAL kit, recently developed for point-of-care of plasma specimens, is thought to be a useful and reliable biomarker for the early diagnosis of decreased kidney functions.

급성 심 질환 환자는 트로포닌(troponin)과 같은 생물학적 표지자(biomarker)가 등장하면서 진단과 치료에 많은 개선이 있었다. 콩팥 질환에서는 많은 치료약제 개발이 꾸준하게 진전해 왔음에도 불구하고 실제 사망률이나 이환률은 별로 개선되지 않았다. 급성 콩팥 손상 환자를 대상으로 응급의료센터에서 측정한 NGAL의 측정치는 NGAL이 증가할수록 Creatinine이 유의하게 증가 하였다. 그러나, AST, ALT, BUN, Na, K, Cl 과의 상관관계는 통계적으로 유의하지 않았다. NAGL kit와 ELISA의 민감도는 ${\geq}300$ (92.2%), ${\geq}200$ (95.6%), ${\geq}100$ (99.6%), 특이도는 ${\geq}300$ (95.1%), ${\geq}200$ (97.3%), ${\geq}100$ (99.4%)로 조사되었으며 양성예측도는 ${\geq}300$ (93.3%), ${\geq}200$ (93.4%), ${\geq}100$ (99.2%), 음성예측도는 ${\geq}300$ (96.7%), ${\geq}200$ (97.7%), ${\geq}100$ (98.1%)로 조사되었으며, 급성 콩팥 손상의 정도를 평가하는 검사로써 조기 진단 및 예후를 예측함에 있어서 환자의 치료의 결정에 유용하게 이용 될 수 있다. 향후 응급의료센터에서 콩팥 질환 환자의 중증도를 평가하고 치료 방향을 결정하며, 예후를 예측하는데 있어서 NGAL kit 검사가 도움이 될 수 있다고 생각한다.

Keywords

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