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Ma L, Langefeld CD, Comeau ME, Bonomo JA, Rocco MV, Burkart JM, Divers J, Palmer ND, Hicks PJ, Bowden DW, Lea JP, Krisher JO, Clay MJ, Freedman BI. APOL1 renal-risk genotypes associate with longer hemodialysis survival in prevalent nondiabetic African American patients with end-stage renal disease. Kidney Int 2016; 90:389-395. [PMID: 27157696 PMCID: PMC4946964 DOI: 10.1016/j.kint.2016.02.032] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Revised: 02/24/2016] [Accepted: 02/25/2016] [Indexed: 01/13/2023]
Abstract
Relative to European Americans, evidence supports that African Americans with end-stage renal disease (ESRD) survive longer on dialysis. Renal-risk variants in the apolipoprotein L1 gene (APOL1), associated with nondiabetic nephropathy and less subclinical atherosclerosis, may contribute to dialysis outcomes. Here, APOL1 renal-risk variants were assessed for association with dialytic survival in 450 diabetic and 275 nondiabetic African American hemodialysis patients from Wake Forest and Emory School of Medicine outpatient facilities. Outcomes were provided by the ESRD Network 6-Southeastern Kidney Council Standardized Information Management System. Dates of death, receipt of a kidney transplant, and loss to follow-up were recorded. Outcomes were censored at the date of transplantation or through 1 July 2015. Multivariable Cox proportional hazards models were computed separately in patients with nondiabetic and diabetic ESRD, adjusting for the covariates age, gender, comorbidities, ancestry, and presence of an arteriovenous fistula or graft at dialysis initiation. In nondiabetic ESRD, patients with 2 (vs. 0/1) APOL1 renal-risk variants had significantly longer dialysis survival (hazard ratio 0.57), a pattern not observed in patients with diabetes-associated ESRD (hazard ratio 1.29). Thus, 2 APOL1 renal-risk variants are associated with longer dialysis survival in African Americans without diabetes, potentially relating to presence of renal-limited disease or less atherosclerosis.
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Affiliation(s)
- Lijun Ma
- Department of Internal Medicine, Section on Nephrology, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA; Center for Public Health Genomics, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Carl D Langefeld
- Center for Public Health Genomics, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA; Division of Public Health Sciences, Department of Biostatistical Sciences, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Mary E Comeau
- Center for Public Health Genomics, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA; Division of Public Health Sciences, Department of Biostatistical Sciences, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Jason A Bonomo
- Department of Biochemistry, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Michael V Rocco
- Department of Internal Medicine, Section on Nephrology, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - John M Burkart
- Department of Internal Medicine, Section on Nephrology, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Jasmin Divers
- Center for Public Health Genomics, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA; Division of Public Health Sciences, Department of Biostatistical Sciences, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Nicholette D Palmer
- Center for Public Health Genomics, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA; Department of Biochemistry, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA; Center for Genomics and Personalized Medicine Research, Center for Diabetes Research, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Pamela J Hicks
- Department of Biochemistry, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Donald W Bowden
- Department of Biochemistry, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA; Center for Genomics and Personalized Medicine Research, Center for Diabetes Research, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Janice P Lea
- Division of Renal Medicine, Department of Internal Medicine, Emory School of Medicine, Atlanta, Georgia, USA
| | - Jenna O Krisher
- Southeastern Kidney Council Inc.-ESRD Network 6, Raleigh, North Carolina, USA
| | - Margo J Clay
- Southeastern Kidney Council Inc.-ESRD Network 6, Raleigh, North Carolina, USA
| | - Barry I Freedman
- Department of Internal Medicine, Section on Nephrology, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA; Center for Public Health Genomics, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA; Center for Genomics and Personalized Medicine Research, Center for Diabetes Research, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA.
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McClellan WM, Satko SG, Gladstone E, Krisher JO, Narva AS, Freedman BI. Individuals with a family history of ESRD are a high-risk population for CKD: implications for targeted surveillance and intervention activities. Am J Kidney Dis 2009; 53:S100-6. [PMID: 19231753 DOI: 10.1053/j.ajkd.2008.07.059] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2008] [Accepted: 07/31/2008] [Indexed: 02/06/2023]
Abstract
Activities intended to improve the detection, treatment, and control of chronic kidney disease (CKD) should be incorporated into existing health care systems and targeted to high-risk populations to avoid redundancy and waste of resources. One high-risk population consists of first- or second-degree family members of patients with end-stage renal disease (ESRD), who are 2 to 3 times as likely to have incident ESRD, have high rates of impaired kidney function and undetected and uncontrolled high blood pressure, and are more likely to be obese. These individuals usually are unaware of their underlying CKD and may discount their own risk of ESRD. The ESRD Network 6 Family History Project shows that the ESRD Networks, which constitute a national CKD surveillance system for patients with stage 5 CKD, may be an existing resource that can be used to identify relatives of incident patients with ESRD and provide these families with information about CKD. Nationally available resources have been developed by the National Kidney Disease Education Program for use with these at-risk families. Individuals interested in population-based CKD control activities should be aware of and use these resources.
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Affiliation(s)
- William M McClellan
- Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA 30322, USA.
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