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• W2023941307 abstract "No AccessJournal of UrologyPediatric urology1 Aug 2007Obstructed Versus Dilated Nonobstructed Kidneys in Children With Congenital Ureteropelvic Junction Narrowing: Role of Urinary Tubular Enzymes Mohamed A. Taha, Ahmed A. Shokeir, Hussein G. Osman, Abd El-Aziz F. Abd El-Aziz, and Sami E. Farahat Mohamed A. TahaMohamed A. Taha Mansoura Urology and Nephrology Center, Mansoura University, Mansoura, Egypt More articles by this author , Ahmed A. ShokeirAhmed A. Shokeir Mansoura Urology and Nephrology Center, Mansoura University, Mansoura, Egypt More articles by this author , Hussein G. OsmanHussein G. Osman Department of Biochemistry, Faculty of Science, Mansoura University, Mansoura, Egypt More articles by this author , Abd El-Aziz F. Abd El-AzizAbd El-Aziz F. Abd El-Aziz Department of Biochemistry, Faculty of Science, Mansoura University, Mansoura, Egypt More articles by this author , and Sami E. FarahatSami E. Farahat Mansoura Urology and Nephrology Center, Mansoura University, Mansoura, Egypt More articles by this author View All Author Informationhttps://doi.org/10.1016/j.juro.2007.04.006AboutFull TextPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract Purpose: We evaluated the role of voided urine lysosomal enzyme N-acetyl-β-D-glucosaminidase and brush border enzymes alkaline phosphatase and γ-glutamyl transferase in differentiating between children with ureteropelvic junction obstruction in need of pyeloplasty and those with dilated nonobstructed kidneys suitable for conservative treatment. Materials and Methods: The study included 35 children with unilateral ureteropelvic junction obstruction treated with pyeloplasty (study group) and 15 children with dilated nonobstructed kidneys who were treated conservatively and followed for 15 months (control group). Voided urine samples were obtained before treatment from both groups, and from the study group at 1, 2, 3, 6, 9 and 12 months postoperatively and the control group at 3, 9 and 15 months of followup. N-acetyl-β-D-glucosaminidase, alkaline phosphatase and γ-glutamyl transferase were measured in urine samples collected from both groups. Results: In the study group the activities of preoperative urinary N-acetyl-β-D-glucosaminidase, alkaline phosphatase and γ-glutamyl transferase were significantly higher than in the control group. A cutoff value of 7.8 mU/mg creatinine N-acetyl-β-D-glucosaminidase yielded a sensitivity of 97.1%, a specificity of 80% and an overall accuracy of 92%. A cutoff value of 34.5 IU/gm creatinine alkaline phosphatase resulted in a sensitivity of 91.4%, a specificity of 100% and an overall accuracy of 94%. A cutoff value of 54 IU/gm creatinine γ-glutamyl transferase yielded a sensitivity of 62.9%, a specificity of 100% and an overall accuracy of 74%. The combination of urinary N-acetyl-β-D-glucosaminidase and alkaline phosphatase resulted in a sensitivity of 100%, a specificity of 80% and an overall accuracy of 94%. Compared to preoperative activities, N-acetyl-β-D-glucosaminidase, alkaline phosphatase and γ-glutamyl transferase decreased significantly at 12 months after pyeloplasty in the study group. Conclusions: Voided urinary N-acetyl-β-D-glucosaminidase, alkaline phosphatase and γ-glutamyl transferase are accurate markers for differentiating between children with ureteropelvic junction obstruction requiring pyeloplasty and those with dilated nonobstructed kidneys suitable for conservative treatment. Measurement of these enzymes in voided urine could be used as a noninvasive tool for long-term followup of children with ureteropelvic junction obstruction after pyeloplasty and those receiving conservative treatment. References 1 : Perinatal obstructive nephropathy. Semin Perinatol2004; 28: 124. 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Google Scholar © 2007 by American Urological AssociationFiguresReferencesRelatedDetailsCited byBeckers G, Mann H, Melzer H, Bemelmans B, Jakse G and Rohrmann D (2007) Urinary Sodium Dodecyl Sulfate Electrophoresis With Silver Staining: A Noninvasive Diagnostic Tool for Obstructive Uropathy in ChildrenJournal of Urology, VOL. 179, NO. 2, (703-707), Online publication date: 1-Feb-2008. Volume 178Issue 2August 2007Page: 640-646 Advertisement Copyright & Permissions© 2007 by American Urological AssociationKeywordsalkaline phosphatasegamma-glutamyltransferaseacetylglucosaminidaseureteral obstructionpediatricsMetricsAuthor Information Mohamed A. Taha Mansoura Urology and Nephrology Center, Mansoura University, Mansoura, Egypt More articles by this author Ahmed A. Shokeir Mansoura Urology and Nephrology Center, Mansoura University, Mansoura, Egypt More articles by this author Hussein G. Osman Department of Biochemistry, Faculty of Science, Mansoura University, Mansoura, Egypt More articles by this author Abd El-Aziz F. Abd El-Aziz Department of Biochemistry, Faculty of Science, Mansoura University, Mansoura, Egypt More articles by this author Sami E. Farahat Mansoura Urology and Nephrology Center, Mansoura University, Mansoura, Egypt More articles by this author Expand All Advertisement PDF downloadLoading ..." @default.
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