Abstract:
BACKGROUND:Susceptibility to coronary artery disease (CAD) and diabetes is encoded by distinct, tightly-linked single nucleotide polymorphisms on chromosome 9p21. This study aimed to examine the association of variant rs1333049 on chromosome 9p21.3 with early-onset and severity of CAD in Chinese patients with and without type 2 diabetes, and to determine the possible impact of rs1333049 on glucose metabolism and inflammation pathways. METHODS:Genotyping of variant rs1333049 on chromosome 9p21.3 was performed in 2387 patients with and without diabetes who were undergoing coronary angiography to evaluate suspected or established CAD. Serum levels of glucose, glycosylated hemoglobin A(1c) (HbA(1c)), insulin, high-sensitivity C-reactive protein, tumor necrosis factor-α, and interleukin-6 were also measured, and compared with each patient's genotype. RESULTS:The homozygous CC genotype of rs1333049 was significantly associated with CAD in diabetic (OR: 1.270, P = 0.044) and non-diabetic (OR: 1.369, P = 0.011) patients after adjusting for traditional risk factors. There was an association between CC genotype and number of diseased vessels in diabetics (P = 0.019), but not in non-diabetics (P = 0.126). Among diabetic patients, CC genotype carriers had an increased risk of early-onset CAD (OR: 2.367, P = 0.008) and greater cumulative atherosclerotic burden compared with non-CC genotype carriers (Gensini score: 31.80 ± 17.20 vs. 23.09 ± 21.63, P = 0.039). No significant differences were observed between genotypes of rs1333049 in serum levels of glucose, insulin, HbA(1c), or inflammatory cytokines for diabetic or non-diabetic patients with CAD. CONCLUSIONS:This study demonstrated a significant association of rs1333049 polymorphism on chromosome 9p21.3 with CAD in Chinese diabetic and non-diabetic patients. The homozygous CC genotype of rs1333049 confers a magnified risk of early-onset and more severe CAD in diabetic patients through a novel biological pathway unrelated to glucose metabolism or inflammation.
journal_name
Chin Med J (Engl)journal_title
Chinese medical journalauthors
Wang W,Peng WH,Lu L,Zhang RY,Zhang Q,Wang LJ,Chen QJ,Shen WFdoi
10.3901/jme.2011.08.066subject
Has Abstractpub_date
2011-01-01 00:00:00pages
66-71issue
1eissn
0366-6999issn
2542-5641journal_volume
124pub_type
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