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Kidney Disease Progression: How to Attenuate Risk

Q)I overheard a conversation at the hospital in which one of the nephrologists told an internist that allopurinol is better than other medications for treating gout because it slows the progression of chronic kidney disease (CKD). What does the data say?

 

CKD is a growing problem in America; the number of adults with CKD doubled from 2000 to 2008.1 Gout is considered an independent risk factor for CKD progression.2 Some randomized controlled trials (RCTs) have shown an association between allopurinol use and decreased proteinuria.3

A recent large retrospective review of Medicare charts assessed the correlation between use and dose of allopurinol and incidence of renal failure in patients older than 65.1 The researchers found that, compared with lower doses, allopurinol doses of 200 to 299 mg/d and > 300 mg/d were associated with a significantly lower hazard ratio for kidney failure, in a multivariate-adjusted model. The findings therefore suggest that doses > 199 mg may slow progression to kidney failure in the elderly.

 

 

 

Despite the strengths of this study, it is worth noting that it did not consider stage of kidney disease, nor did it distinguish comorbidities of the patients. The retrospective chart review format did not allow for identification of concurrent medication use (including OTC and herbal products).

The National Institute of Diabetes and Digestive and Kidney Diseases is currently conducting an RCT to investigate the renoprotective effects of allopurinol versus placebo in diabetic patients. (Clinical Trials.gov identifier: NCT02017171). Enrollment was completed in 2014, and results are expected in June 2019.

One important proviso about allopurinol: While it is inexpensive and generally well tolerated, prescribers should be aware of rare sensitivity reactions, particularly Stevens-Johnson syndrome. —MRS

Mary Rogers Sorey, MSN
Division of Nephrology and Hypertension at Vanderbilt University Medical Center, Nashville

References

1. Singh JA, Yu S. Are allopurinol dose and duration of use nephroprotective in the elderly? A Medicare claims study of allopurinol use and incident renal failure. Ann Rheum Dis. 2016 Jun 13. [Epub ahead of print]
2. Roughley MJ, Belcher J, Mallen CD, Roddy E. Gout and risk of chronic kidney disease and nephrolithiasis: meta-analysis of observational studies. Arthritis Res Ther. 2015;17:90.
3. Kanbay M, Huddam B, Azak A, et al. A randomized study of allopurinol on endothelial function and estimated glomerular filtration rate in asymptomatic hyperuricemic subjects with normal renal function. Clin J Am Soc Nephrol. 2011;6(8):1887-1894.

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Renal Consult is edited by Jane S. Davis, CRNP, DNP, a member of the Clinician Reviews editorial board, who is a nurse practitioner in the Division of Nephrology at the University of Alabama at Birmingham and is the communications chairperson for the National Kidney Foundation’s Council of Advanced Practitioners (NKF-CAP); and Kim Zuber, PA-C, MSPS, DFAAPA, a semi-retired PA who works with the American Academy of Nephrology PAs and is a past chair of the NKF-CAP. This month’s responses were authored by Nicole D. McCormick, MS, MBA, NP-C, CCTC, who practices at the University of Colorado Renal Transplant Clinic in Aurora, Colorado, and Mary Rogers Sorey, MSN, who is an Assistant in Medicine in the Division of Nephrology and Hypertension at Vanderbilt University Medical Center, Nashville.

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Renal Consult is edited by Jane S. Davis, CRNP, DNP, a member of the Clinician Reviews editorial board, who is a nurse practitioner in the Division of Nephrology at the University of Alabama at Birmingham and is the communications chairperson for the National Kidney Foundation’s Council of Advanced Practitioners (NKF-CAP); and Kim Zuber, PA-C, MSPS, DFAAPA, a semi-retired PA who works with the American Academy of Nephrology PAs and is a past chair of the NKF-CAP. This month’s responses were authored by Nicole D. McCormick, MS, MBA, NP-C, CCTC, who practices at the University of Colorado Renal Transplant Clinic in Aurora, Colorado, and Mary Rogers Sorey, MSN, who is an Assistant in Medicine in the Division of Nephrology and Hypertension at Vanderbilt University Medical Center, Nashville.

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Renal Consult is edited by Jane S. Davis, CRNP, DNP, a member of the Clinician Reviews editorial board, who is a nurse practitioner in the Division of Nephrology at the University of Alabama at Birmingham and is the communications chairperson for the National Kidney Foundation’s Council of Advanced Practitioners (NKF-CAP); and Kim Zuber, PA-C, MSPS, DFAAPA, a semi-retired PA who works with the American Academy of Nephrology PAs and is a past chair of the NKF-CAP. This month’s responses were authored by Nicole D. McCormick, MS, MBA, NP-C, CCTC, who practices at the University of Colorado Renal Transplant Clinic in Aurora, Colorado, and Mary Rogers Sorey, MSN, who is an Assistant in Medicine in the Division of Nephrology and Hypertension at Vanderbilt University Medical Center, Nashville.

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Q)I overheard a conversation at the hospital in which one of the nephrologists told an internist that allopurinol is better than other medications for treating gout because it slows the progression of chronic kidney disease (CKD). What does the data say?

 

CKD is a growing problem in America; the number of adults with CKD doubled from 2000 to 2008.1 Gout is considered an independent risk factor for CKD progression.2 Some randomized controlled trials (RCTs) have shown an association between allopurinol use and decreased proteinuria.3

A recent large retrospective review of Medicare charts assessed the correlation between use and dose of allopurinol and incidence of renal failure in patients older than 65.1 The researchers found that, compared with lower doses, allopurinol doses of 200 to 299 mg/d and > 300 mg/d were associated with a significantly lower hazard ratio for kidney failure, in a multivariate-adjusted model. The findings therefore suggest that doses > 199 mg may slow progression to kidney failure in the elderly.

 

 

 

Despite the strengths of this study, it is worth noting that it did not consider stage of kidney disease, nor did it distinguish comorbidities of the patients. The retrospective chart review format did not allow for identification of concurrent medication use (including OTC and herbal products).

The National Institute of Diabetes and Digestive and Kidney Diseases is currently conducting an RCT to investigate the renoprotective effects of allopurinol versus placebo in diabetic patients. (Clinical Trials.gov identifier: NCT02017171). Enrollment was completed in 2014, and results are expected in June 2019.

One important proviso about allopurinol: While it is inexpensive and generally well tolerated, prescribers should be aware of rare sensitivity reactions, particularly Stevens-Johnson syndrome. —MRS

Mary Rogers Sorey, MSN
Division of Nephrology and Hypertension at Vanderbilt University Medical Center, Nashville

Q)I overheard a conversation at the hospital in which one of the nephrologists told an internist that allopurinol is better than other medications for treating gout because it slows the progression of chronic kidney disease (CKD). What does the data say?

 

CKD is a growing problem in America; the number of adults with CKD doubled from 2000 to 2008.1 Gout is considered an independent risk factor for CKD progression.2 Some randomized controlled trials (RCTs) have shown an association between allopurinol use and decreased proteinuria.3

A recent large retrospective review of Medicare charts assessed the correlation between use and dose of allopurinol and incidence of renal failure in patients older than 65.1 The researchers found that, compared with lower doses, allopurinol doses of 200 to 299 mg/d and > 300 mg/d were associated with a significantly lower hazard ratio for kidney failure, in a multivariate-adjusted model. The findings therefore suggest that doses > 199 mg may slow progression to kidney failure in the elderly.

 

 

 

Despite the strengths of this study, it is worth noting that it did not consider stage of kidney disease, nor did it distinguish comorbidities of the patients. The retrospective chart review format did not allow for identification of concurrent medication use (including OTC and herbal products).

The National Institute of Diabetes and Digestive and Kidney Diseases is currently conducting an RCT to investigate the renoprotective effects of allopurinol versus placebo in diabetic patients. (Clinical Trials.gov identifier: NCT02017171). Enrollment was completed in 2014, and results are expected in June 2019.

One important proviso about allopurinol: While it is inexpensive and generally well tolerated, prescribers should be aware of rare sensitivity reactions, particularly Stevens-Johnson syndrome. —MRS

Mary Rogers Sorey, MSN
Division of Nephrology and Hypertension at Vanderbilt University Medical Center, Nashville

References

1. Singh JA, Yu S. Are allopurinol dose and duration of use nephroprotective in the elderly? A Medicare claims study of allopurinol use and incident renal failure. Ann Rheum Dis. 2016 Jun 13. [Epub ahead of print]
2. Roughley MJ, Belcher J, Mallen CD, Roddy E. Gout and risk of chronic kidney disease and nephrolithiasis: meta-analysis of observational studies. Arthritis Res Ther. 2015;17:90.
3. Kanbay M, Huddam B, Azak A, et al. A randomized study of allopurinol on endothelial function and estimated glomerular filtration rate in asymptomatic hyperuricemic subjects with normal renal function. Clin J Am Soc Nephrol. 2011;6(8):1887-1894.

References

1. Singh JA, Yu S. Are allopurinol dose and duration of use nephroprotective in the elderly? A Medicare claims study of allopurinol use and incident renal failure. Ann Rheum Dis. 2016 Jun 13. [Epub ahead of print]
2. Roughley MJ, Belcher J, Mallen CD, Roddy E. Gout and risk of chronic kidney disease and nephrolithiasis: meta-analysis of observational studies. Arthritis Res Ther. 2015;17:90.
3. Kanbay M, Huddam B, Azak A, et al. A randomized study of allopurinol on endothelial function and estimated glomerular filtration rate in asymptomatic hyperuricemic subjects with normal renal function. Clin J Am Soc Nephrol. 2011;6(8):1887-1894.

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