Efficacy and safety of febuxostat in the treatment of hyperuricemia in stable kidney transplant recipients.
BACKGROUND
Post-transplant hyperuricemia (PTHU), defined as serum uric acid concentration ≥7.0 mg/dL or need for treatment with allopurinol or benzbromarone, reduces long-term allograft survival in kidney transplant recipients. Febuxostat, a new nonpurine selective xanthine oxidase inhibitor, is well tolerated in patients with moderate renal impairment. However, its efficacy and safety in kidney recipients with PTHU is unclear. We therefore assessed the efficacy and safety of febuxostat in stable kidney transplant recipients with PTHU.


METHODS
Of 93 stable adult kidney transplant recipients, 51 were diagnosed with PTHU (PTHU group) and 42 were not (NPTHU group). Of the 51 patients with PTHU, 26 were treated with febuxostat (FX group) and 25 were not (NFX group), at the discretion of each attending physician. One-year changes in serum uric acid concentrations, rates of achievement of target uric acid (<6.0 mg/dL), estimated glomerular filtration rates in allografts, and adverse events were retrospectively analyzed in the FX, NFX, and NPTHU groups.


RESULTS
The FX group showed significantly greater decreases in serum uric acid (-2.0±1.1 mg/dL versus 0.0±0.8 mg/dL per year, P<0.01) and tended to show a higher rate of achieving target uric acid levels (50% versus 24%; odds ratio 3.17 [95% confidence interval 0.96-10.5], P=0.08) than the NFX group. Although baseline allograft estimated glomerular filtration rates tended to be lower in the FX group than in the NFX group (40±14 mL/min/1.73 m(2) versus 47±19 mL/min/1.73 m(2)), changes in allograft estimated glomerular filtration rate were similar (+1.0±4.9 mL/min/1.73 m(2) versus -0.2±6.9 mL/min/1.73 m(2) per year, P=0.50). None of the patients in the FX group experienced any severe adverse effects, such as pancytopenia or attacks of gout, throughout the entire study period. Nephrologists were more likely than urologists to start febuxostat in kidney transplant recipients with PTHU (69% versus 8%).


CONCLUSION
Treatment with febuxostat sufficiently lowered uric acid levels without severe adverse effects in stable kidney transplant recipients with PTHU.
['Sofue|Tadashi|T|', 'Inui|Masashi|M|', 'Hara|Taiga|T|', 'Nishijima|Yoko|Y|', 'Moriwaki|Kumiko|K|', 'Hayashida|Yushi|Y|', 'Ueda|Nobufumi|N|', 'Nishiyama|Akira|A|', 'Kakehi|Yoshiyuki|Y|', 'Kohno|Masakazu|M|']
D000328:Adult D000368:Aged D000069465:Febuxostat D005260:Female D005919:Glomerular Filtration Rate D006074:Gout Suppressants D006801:Humans D033461:Hyperuricemia D016030:Kidney Transplantation D008297:Male D008875:Middle Aged D010818:Practice Patterns, Physicians' D012189:Retrospective Studies D013844:Thiazoles D014527:Uric Acid D014969:Xanthine Oxidase
febuxostat post-transplant hyperuricemia uric acid chronic kidney disease