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상염색체우성 다낭신에서 질병진행 예측인자로서 요중 안지오텐시노겐의 유용성
박혜인조 ( Hayne Cho Park ),황진호 ( Jin Ho Hwang ),백선하 ( Seon Ha Baek ),한미연 ( Mi Yeun Han ),윤유경 ( Yu Kyoung Yun ),윤명옥 ( Myeong Ok Yoon ),오국환 ( Kook Hwan Oh ),구자룡 ( Ja Ryong Koo ),김형직 ( Hyung Jik Kim ),노정우 ( 대한신장학회 2011 Kidney Research and Clinical Practice Vol.30 No.5
Purpose: The renin-angiotensin-aldosterone system activation has been suggested as a potential risk factor for renal progression in autosomal dominant polycystic kidney disease (ADPKD). This study was performed to evaluate urinary angiotensinogen as a biomarker of renal progression in ADPKD. Methods: Patients with estimated glomerular filtration rate (eGFR) 30 mL/min/1.73m≥2 were enrolled in the study. Specimens (blood and urine) and computed tomography (CT) were taken from each subject. The eGFR was calculated by 4-variable MDRD equation and total kidney volume (TKV) was measured from CT images by modified ellipsoid method. Urinary angiotensinogen (AGT) and neutrophil gelatinaseassociated lipocalin (NGAL) were measured by ELISA. The concentration of AGT was adjusted with random urine creatinine (Cr). The association between urinary biomarkers, TKV and eGFR were evaluated. Results: A total of 59 (M:F=31:28) subjects were enrolled in the study and their mean age was 46 years. The eGFR and TKV at the enrollment were 77.3±15.6 mL/min/1.73m2 and 1389.8±925.1 mL, respectively. Log AGT/Cr was associated with TKV (r2=0.11p=0.01) in the earlier stage of disease (TKV<000 mL). However, it did not show significant correlation with eGFR. Log NGAL was not associated with either TKV or eGFR. Urinary AGT/Cr was closely related to the number of anti-hypertensive medication, TKV, and the presence of albuminuria, although there was no correlation with plasma renin activity or aldosterone level. Conclusion: Urinary angiotensinogen may be a useful biomarker of disease progression in ADPKD patients.