A Genome-Wide Association Study Reveals a Quantitative Trait Locus of Adiponectin on CDH13 That Predicts Cardiometabolic Outcomes

  1. Wen-Harn Pan1,9
  1. 1Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
  2. 2Division of Cardiology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
  3. 3Department of Internal Medicine, Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
  4. 4Cardiovascular Research Center, National Yang-Ming University, Taipei, Taiwan
  5. 5Department of Medical Research and Education, Taipei Veterans General Hospital, Taipei, Taiwan
  6. 6Institute of Statistical Science, Academia Sinica, Taipei, Taiwan
  7. 7Taichung Veterans General Hospital, Taichung, Taiwan
  8. 8College of Medicine, National Cheng Kung University, Tainan, Taiwan
  9. 9Division of Preventive Medicine and Health Service Research, National Health Research Institutes, Miaoli, Taiwan.
  1. Corresponding author: Wen-Harn Pan, pan{at}ibms.sinica.edu.tw.

Abstract

OBJECTIVE The plasma adiponectin level, a potential upstream and internal facet of metabolic and cardiovascular diseases, has a reasonably high heritability. Whether other novel genes influence the variation in adiponectin level and the roles of these genetic variants on subsequent clinical outcomes has not been thoroughly investigated. Therefore, we aimed not only to identify genetic variants modulating plasma adiponectin levels but also to investigate whether these variants are associated with adiponectin-related metabolic traits and cardiovascular diseases.

RESEARCH DESIGN AND METHODS We conducted a genome-wide association study (GWAS) to identify quantitative trait loci (QTL) associated with high molecular weight forms of adiponectin levels by genotyping 382 young-onset–hypertensive (YOH) subjects with Illumina HumanHap550 SNP chips. The culpable single nucleotide polymorphism (SNP) variants responsible for lowered adiponectin were then confirmed in another 559 YOH subjects, and the association of these SNP variants with the risk of metabolic syndrome (MS), type 2 diabetes mellitus (T2DM), and ischemic stroke was examined in an independent community–based prospective cohort, the CardioVascular Disease risk FACtors Two-township Study (CVDFACTS, n = 3,350).

RESULTS The SNP (rs4783244) most significantly associated with adiponectin levels was located in intron 1 of the T-cadherin (CDH13) gene in the first stage (P = 7.57 × 10−9). We replicated and confirmed the association between rs4783244 and plasma adiponectin levels in an additional 559 YOH subjects (P = 5.70 × 10−17). This SNP was further associated with the risk of MS (odds ratio [OR] = 1.42, P = 0.027), T2DM in men (OR = 3.25, P = 0.026), and ischemic stroke (OR = 2.13, P = 0.002) in the CVDFACTS.

CONCLUSIONS These findings indicated the role of T-cadherin in modulating adiponectin levels and the involvement of CDH13 or adiponectin in the development of cardiometabolic diseases.

  • Received September 29, 2010.
  • Accepted June 6, 2011.

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