title: Urinary angiotensinogen as a predictive marker in patients with immunoglobulin A nephropathy.
abstract: BACKGROUND
  The intrarenal renin-angiotensinogen system (RAS) plays a major role in the progression of chronic kidney disease. Urinary angiotensinogen (UAGT) provides a specific index of the intrarenal RAS status. This study was conducted to find the role of UAGT as a predictive marker in patients with immunoglobulin A nephropathy (IgAN).
  
  
  METHODS
  Thirty-six patients with IgAN, 14 non-IgAN and 15 healthy controls were included. The UAGT concentration was measured using human ELISA kits and adjusted by urinary creatinine.
  
  
  RESULTS
  UAGT levels were significantly higher in patients with IgAN and non-IgAN than in healthy subjects (104.96 vs. 6.71 ng/mgCr, p < 0.01). Using univariate regression analysis, UAGT was found to correlate with the urine protein-to-creatinine ratio (UPCR), serum creatinine, and systolic and diastolic blood pressure in patients with IgAN. Multivariate regression analysis revealed that UAGT correlated positively with UPCR. Patients with levels of UAGT >100 ng/mgCr showed higher serum creatinine after treatment than patients with UAGT levels <100 ng/mgCr.
  
  
  CONCLUSIONS
  This study showed that UAGT levels are increased and correlate positively with the UPCR in IgAN. Patients with high levels of UAGT may have poor renal function following treatment.
authors.affiliation: Division of Nephrology, Kyung Hee University School of Medicine, Seoul, Korea.
authors.forename: Yang-Gyun
authors.initials: YG
authors.lastname: Kim
authors.affiliation: Division of Nephrology, Kyung Hee University School of Medicine, Seoul, Korea.
authors.forename: Se-Bin
authors.initials: SB
authors.lastname: Song
authors.affiliation: Division of Nephrology, Kyung Hee University School of Medicine, Seoul, Korea.
authors.forename: Sang-Ho
authors.initials: SH
authors.lastname: Lee
authors.affiliation: Division of Nephrology, Kyung Hee University School of Medicine, Seoul, Korea.
authors.forename: Ju-Young
authors.initials: JY
authors.lastname: Moon
authors.affiliation: Division of Nephrology, Kyung Hee University School of Medicine, Seoul, Korea.
authors.forename: Kyung-Hwan
authors.initials: KH
authors.lastname: Jeong
authors.affiliation: Division of Nephrology, Kyung Hee University School of Medicine, Seoul, Korea.
authors.forename: Tae-Won
authors.initials: TW
authors.lastname: Lee
authors.affiliation: Division of Nephrology, Kyung Hee University School of Medicine, Seoul, Korea. cgihm@yahoo.co.kr.|Department of Nephrology, Kyung Hee University Medical Center, 1 Hoegi-dong, Dongdaemun-gu, Seoul, 130-702, Korea. cgihm@yahoo.co.kr.
authors.forename: Chun-Gyoo
authors.initials: CG
authors.lastname: Ihm
mesh_terms: D000328:Adult; D000808:Angiotensinogen / Q000652:urine*; D015415:Biomarkers / Q000652:urine*; D003404:Creatinine / Q000652:urine; D005260:Female; D005921:Glomerulonephritis / Q000652:urine; D005922:Glomerulonephritis, IGA / Q000652:urine*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011507:Proteinuria / Q000652:urine; D012044:Regression Analysis; D012084:Renin-Angiotensin System / Q000502:physiology; D012189:Retrospective Studies
chemical_list: D015415:Biomarkers; D000808:Angiotensinogen; D003404:Creatinine