Analysis of glycosuria in okapi (Okapia johnstoni): Examination of urinary N-acetyl-β-D-glucosaminidase

Ryuta Kawasaki, Akinori Azumano, Miya Ueda, Souhei Tanaka, Aya Yokota, Kazuo Katoh, Akihiko Hagino

Research output: Contribution to journalArticlepeer-review


We analyzed the urinary excretion of glucose and N-acetyl-β-D-glucosaminidase (NAG) in six okapis (Okapia johnstoni) in captivity to investigate the cause of their urinary sugar excretion. The urinary glucose-positive okapi had significantly higher urinary NAG indices than the urinary glucose-negative okapi. There was also a positive correlation between urinary glucose levels and urinary NAG indices. These results suggest that the proximal tubular function of the glycosuric okapi may have been obstructed, which impaired glucose reabsorption.

Original languageEnglish
Pages (from-to)910-914
Number of pages5
JournalAnimal Science Journal
Issue number10
Publication statusPublished - 2014 Oct 1


  • Okapi
  • Proximal renal tubular disorder
  • Renal glycosuria
  • Urinary N-acetyl-β-D-glucosaminidase

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)


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