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      Fever and Proximal Tubular Function in Acute Pyelonephritis

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          Abstract

          The urinary excretion of α<sub>1-</sub>microglobulin (α<sub>1</sub>M), β<sub>2</sub>-microglobulin (β<sub>2</sub>M), retinol-binding protein (RBP) and N-acetyl-β- D-glucosaminidase (NAG) as markers of proximal tubular dysfunction was measured in various forms of urinary tract infections (UTI) and in fever due to non-renal infections. The urinary concentration of these proteins was significantly increased in acute pyelonephritis compared with acute cystitis and asymptomatic bacteriuria. Tubular proteinuria and enzymuria could also be demonstrated in subjects with fever of non-renal origin and corresponded to the findings in pyelonephritis. It is suggested that fever per se is the most likely cause of the tubular proteinuria seen in acute pyelonephritis. In localizing an acute UTI characterization of the urinary protein profile seems to have no advantage over a carefully measured body temperature. The urinary excretion of α<sub>1</sub>M, β<sub>2</sub>M and RBP were highly correlated, while urinary NAG activity was less correlated to these low-molecular weight proteins. Fibrin degradation product D (FDP-D) was detected in the urines in 60% of the patients with acute pyelonephritis and in one third of those with acute cystitis. The estimation of FDP in urine therefore seems to be of little value in the level diagnosis of UTI.

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          Author and article information

          Journal
          NEF
          Nephron
          10.1159/issn.1660-8151
          Nephron
          S. Karger AG
          1660-8151
          2235-3186
          1985
          1985
          04 December 2008
          : 41
          : 1
          : 39-44
          Affiliations
          aDepartment of Infectious Diseases, University of Göteborg, Sweden; bUnit for Cancer Research, University of Leeds, England
          Article
          183544 Nephron 1985;41:39–44
          10.1159/000183544
          2412142
          © 1985 S. Karger AG, Basel

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          Page count
          Pages: 6
          Categories
          Original Paper

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