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Increased Urinary Angiotensin-Converting Enzyme 2 in Renal Transplant Patients with Diabetes

Author

Listed:
  • Fengxia Xiao
  • Swapnil Hiremath
  • Greg Knoll
  • Joseph Zimpelmann
  • Kajenny Srivaratharajah
  • Deepak Jadhav
  • Dean Fergusson
  • Chris R J Kennedy
  • Kevin D Burns

Abstract

Angiotensin-converting enzyme 2 (ACE2) is expressed in the kidney and may be a renoprotective enzyme, since it converts angiotensin (Ang) II to Ang-(1-7). ACE2 has been detected in urine from patients with chronic kidney disease. We measured urinary ACE2 activity and protein levels in renal transplant patients (age 54 yrs, 65% male, 38% diabetes, n = 100) and healthy controls (age 45 yrs, 26% male, n = 50), and determined factors associated with elevated urinary ACE2 in the patients. Urine from transplant subjects was also assayed for ACE mRNA and protein. No subjects were taking inhibitors of the renin-angiotensin system. Urinary ACE2 levels were significantly higher in transplant patients compared to controls (p = 0.003 for ACE2 activity, and p≤0.001 for ACE2 protein by ELISA or western analysis). Transplant patients with diabetes mellitus had significantly increased urinary ACE2 activity and protein levels compared to non-diabetics (p

Suggested Citation

  • Fengxia Xiao & Swapnil Hiremath & Greg Knoll & Joseph Zimpelmann & Kajenny Srivaratharajah & Deepak Jadhav & Dean Fergusson & Chris R J Kennedy & Kevin D Burns, 2012. "Increased Urinary Angiotensin-Converting Enzyme 2 in Renal Transplant Patients with Diabetes," PLOS ONE, Public Library of Science, vol. 7(5), pages 1-9, May.
    • Handle: RePEc:plo:pone00:0037649
    DOI: 10.1371/journal.pone.0037649
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