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Brief Genetics Report

Genetic Variation at the ACE Gene Is Associated With Persistent Microalbuminuria and Severe Nephropathy in Type 1 Diabetes

The DCCT/EDIC Genetics Study

  1. Andrew P. Boright12,
  2. Andrew D. Paterson23,
  3. Lucia Mirea34,
  4. Shelley B. Bull34,
  5. Alireza Mowjoodi2,
  6. Stephen W. Scherer2,
  7. Bernard Zinman45 and
  8. and the DCCT/EDIC Research Group*
  1. 1Department of Medicine, University Health Network, University of Toronto, Toronto, Canada
  2. 2Program in Genetics and Genomic Biology, Hospital for Sick Children, Toronto, Canada
  3. 3Department of Public Health Sciences, University of Toronto, Toronto, Canada
  4. 4Samuel Lunenfeld Research Institute of Mount Sinai Hospital, Prosserman Center for Health Research, University of Toronto, Toronto, Canada
  5. 5Leadership Sinai Centre for Diabetes, Department of Medicine, Mount Sinai Hospital, Toronto, Canada
  1. Address correspondence and reprint requests to Andrew P. Boright, MD, PhD, Department of Medicine, Division of Endocrinology, University Health Network, 200 Elizabeth St., Toronto, Ontario, Canada M5G 2C4. E-mail: andy{at}genet.sickkids.on.ca
Diabetes 2005 Apr; 54(4): 1238-1244. https://doi.org/10.2337/diabetes.54.4.1238
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The DCCT/EDIC Genetics Study

Abstract

The development and progression of microvascular complications have been extensively documented in a cohort of type 1 diabetic subjects enrolled in the Diabetes Control and Complications Trial (DCCT) and followed in the Epidemiology of Diabetes Interventions and Complications (EDIC) study. We describe the association of genetic variation in the ACE gene in 1,365 DCCT/EDIC subjects with incident persistent microalbuminuria (n = 312) and severe nephropathy (n = 115). We studied three markers (rs1800764, insertion/deletion, and rs9896208) in the ACE gene that allowed us to capture genetic variation in the common haplotypes occurring at frequencies of >5% in Caucasians. Compared with the more frequent genotype (D/I) for the insertion/deletion polymorphism, in multivariate models, the I/I genotype conferred a lower risk for persistent microalbuminuria (hazard ratio [HR] 0.62 [95% CI 0.43–0.89], P = 0.009) and severe nephropathy (0.56 [0.32–0.96], P = 0.033). Variation at the two other markers, rs1800764 and rs9896208, were also associated with these renal outcomes. In addition, homozygosity for the common haplotype TIC (which corresponded to the T, insertion, and C alleles at the three markers, rs1800764, insertion/deletion, and rs9896208, respectively) versus the CDT/TIC haplotype pair was associated with lower risk for development of persistent microalbuminuria (HR 0.49 [0.32–0.75], P = 0.0009) and severe nephropathy (0.41 [0.22–0.78], P = 0.006). Our findings in the DCCT/EDIC cohort provide strong evidence that genetic variation at the ACE gene is associated with the development of nephropathy in patients with type 1 diabetes.

  • AER, albumin excretion rate
  • DCCT, Diabetes Control and Complications Trial
  • EDIC, Epidemiology of Diabetes Interventions and Complications
  • SNP, single nucleotide polymorphism

Footnotes

  • *

    * A complete list of the individuals and institutions participating in the DCCT/EDIC Research Group appears in N Engl J Med 348:2294–2303, 2003.

  • Additional information for this article can be found in an online appendix at http://diabetes.diabetesjournals.org.

    • Accepted December 23, 2004.
    • Received October 6, 2004.
  • DIABETES
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Genetic Variation at the ACE Gene Is Associated With Persistent Microalbuminuria and Severe Nephropathy in Type 1 Diabetes
Andrew P. Boright, Andrew D. Paterson, Lucia Mirea, Shelley B. Bull, Alireza Mowjoodi, Stephen W. Scherer, Bernard Zinman
Diabetes Apr 2005, 54 (4) 1238-1244; DOI: 10.2337/diabetes.54.4.1238

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Genetic Variation at the ACE Gene Is Associated With Persistent Microalbuminuria and Severe Nephropathy in Type 1 Diabetes
Andrew P. Boright, Andrew D. Paterson, Lucia Mirea, Shelley B. Bull, Alireza Mowjoodi, Stephen W. Scherer, Bernard Zinman
Diabetes Apr 2005, 54 (4) 1238-1244; DOI: 10.2337/diabetes.54.4.1238
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