The renin-aldosterone axis in kidney transplant recipients and its association with allograft function and structure

Naim S Issa, Fernando Ortiz, Scott A Reule, Aleksandra Kukla, Bert L Kasiske, Michael Mauer, Scott Jackson, Arthur J Matas, Hassan N Ibrahim

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The level of the renin-angiotensin-aldosterone system (RAAS) activity in kidney transplant recipients has not been extensively studied or serially profiled. To describe this axis and to determine its association with glomerular filtration rate (GFR) change, interstitial expansion, and end-stage renal disease (ESRD), we measured plasma renin activity (PRA) and plasma aldosterone levels annually for 5 years in 153 kidney transplant recipients randomly assigned to losartan or placebo. PRA and plasma aldosterone levels were in the normal range at all times and did not vary by immunosuppression regimen. Those on losartan exhibited higher PRA but similar plasma aldosterone levels. Neither baseline nor serial PRA or plasma aldosterone levels were associated with GFR decline, proteinuria, or interstitial expansion. Losartan use (hazard ratio (HR) 0.48 (95% confidence interval (CI) 0.21-1.0), insignificant) and Caucasian donor (HR 0.18 (95% CI 0.07-0.4) significant) were associated with less doubling of serum creatinine, death, or ESRD. Hypertension, <3 human leukocyte antigen matches, the combination of tacrolimus-rapamycin, and acute rejection were associated with more events. Neither PRA nor plasma aldosterone levels were independently associated with this outcome. Higher serial plasma aldosterone levels were associated, however, with a significantly higher risk of ESRD (HR 1.01 (95% CI 1.00-1.02)). Thus, systemic RAAS is not overly activated in kidney transplant recipients, but this may not reflect the intrarenal system. Importantly, plasma aldosterone levels may be associated with more ESRD.

Original languageEnglish (US)
Pages (from-to)404-415
Number of pages12
JournalKidney international
Volume85
Issue number2
DOIs
StatePublished - Jan 1 2014

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Aldosterone
Renin
Allografts
Kidney
Chronic Kidney Failure
Losartan
Confidence Intervals
Renin-Angiotensin System
Glomerular Filtration Rate
Transplant Recipients
Tacrolimus
Sirolimus
HLA Antigens
Proteinuria
Immunosuppression
Creatinine
Reference Values
Placebos
Tissue Donors
Hypertension

Keywords

  • aldosterone
  • kidney transplantation
  • reninangiotensin system

Cite this

The renin-aldosterone axis in kidney transplant recipients and its association with allograft function and structure. / Issa, Naim S; Ortiz, Fernando; Reule, Scott A; Kukla, Aleksandra; Kasiske, Bert L; Mauer, Michael; Jackson, Scott; Matas, Arthur J; Ibrahim, Hassan N.

In: Kidney international, Vol. 85, No. 2, 01.01.2014, p. 404-415.

Research output: Contribution to journalArticle

Issa, Naim S ; Ortiz, Fernando ; Reule, Scott A ; Kukla, Aleksandra ; Kasiske, Bert L ; Mauer, Michael ; Jackson, Scott ; Matas, Arthur J ; Ibrahim, Hassan N. / The renin-aldosterone axis in kidney transplant recipients and its association with allograft function and structure. In: Kidney international. 2014 ; Vol. 85, No. 2. pp. 404-415.
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