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Uric acid lowering for slowing CKD progression after the CKD-FIX trial: a solved question or still a dilemma?

Giovanna Leoncini1, Cecilia Barnini1, Luca Manco1

  • 1Department of Internal Medicine, University of Genoa and IRCCS Ospedale Policlinico San Martino, Genova, Italy.

Clinical Kidney Journal
|August 25, 2022
PubMed

Insights

Hyperuricemia is linked to kidney disease, but urate-lowering treatments like allopurinol show no clear kidney benefits. Further research is needed to understand uric acid

Area of Science:

  • Nephrology
  • Cardiovascular Medicine
  • Pharmacology

Background:

  • Hyperuricemia is associated with cardiovascular risks and kidney disease.
  • Uric acid may contribute to renal haemodynamic and tissue damage.
  • Urate-lowering therapies are explored for kidney protection.

Purpose of the Study:

  • To critically review literature on urate-lowering treatments and renal outcomes.
  • To interpret recent trial results regarding nephroprotection.
  • To evaluate the role of xanthine oxidase inhibitors in kidney health.

Main Methods:

  • Literature review of in vitro studies, animal models, and clinical trials.
  • Critical analysis of randomized controlled trials involving allopurinol and febuxostat.
  • Interpretation of intervention trial data on urate-lowering treatments.

Main Results:

  • In vitro and animal studies suggest uric acid's role in renal damage.
  • Recent randomized controlled trials did not demonstrate renal benefits from allopurinol or febuxostat.
  • Evidence for urate-lowering therapy improving nephroprotection remains inconclusive.

Conclusions:

  • Current evidence casts doubt on the efficacy of allopurinol and febuxostat for nephroprotection.
  • The role of urate-lowering treatment in improving kidney outcomes requires further investigation.
  • Re-evaluation of the therapeutic approach for hyperuricemia-related kidney disease is warranted.

Keywords:
allopurinolchronic kidney diseasedisease progressionhyperuricemianephroprotectionurate-lowering treatmenturic acid

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