Association between a functional variant of the KLOTHO gene and high-density lipoprotein cholesterol, blood pressure, stroke, and longevity

Dan E. Arking, Gil Atzmon, Albert Arking, Nir Barzilai, Harry C. Dietz

Research output: Contribution to journalArticle

203 Scopus citations

Abstract

We previously identified a functional variant of KLOTHO, termed KL-VS, that is associated with human aging and early-onset occult coronary artery disease. Here, we determine whether the KL-VS allele influences cardiovascular disease risk factors, cardiovascular events, and ultimately, mortality. A total of 525 Ashkenazi Jews composed of 216 probands (age ≥95 years) and 309 unrelated individuals (ages 51 to 94) were genotyped for the KL-VS allele. In concordance with our previous data in Czech individuals (age ≥79; P<0.01), a heterozygous advantage for longevity was observed for individuals ≥79 years of age (P<0.004). Combined analysis indicates a 1.57-fold (95% CI, 1.23 to 1.98) increased odds ratio (OR) for 5-year survival in two independent populations (P<0.0002). Cardiovascular disease risk factors were assessed through multivariate regression analysis, demonstrating that high-density lipoprotein cholesterol (HDL-C; P<0.05) and systolic blood pressure (SBP; P<0.008) are associated with KL-VS genotype. History of vascular events was analyzed using logistic regression, indicating that after adjustment for traditional risk factors, heterozygous individuals were at significantly lower risk for stroke than wild-type individuals (OR, 5.88; 95% CI, 1.18 to 29.41), whereas homozygous KL-VS individuals had the highest risk (OR, 30.65; 95% CI, 2.55 to 368.00). Similarly, prospective analysis of mortality in probands using Cox regression indicates that wild-type individuals have a 2.15-fold (95% CI, 1.18 to 3.91) and homozygous KL-VS individuals a 4.49-fold (95% CI, 1.35 to 14.97) increase in relative risk for mortality after adjusting for potential confounders. Thus, cross-sectional and prospective studies confirm a genetic model in which the KL-VS allele confers a heterozygous advantage in conjunction with a marked homozygous disadvantage for HDL-C levels, SBP, stroke, and longevity.

Original languageEnglish (US)
Pages (from-to)412-418
Number of pages7
JournalCirculation research
Volume96
Issue number4
DOIs
StatePublished - Mar 23 2005

Keywords

  • Aging
  • Cardiovascular genomics
  • Genetics
  • Hypertension
  • Lipids

ASJC Scopus subject areas

  • Physiology
  • Cardiology and Cardiovascular Medicine

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