Abstract
AimsThe common copy number variant (CNV) in the haptoglobin (Hp) gene may influence the susceptibility to diabetic macrovascular diseases. We aimed to investigate the relationship of the genetic variant rs2000999, located in the haptoglobin-related protein (HPR) gene, with serum Hp levels and diabetic macrovascular diseases in Chinese type 2 diabetes patients. MethodsThe Hp CNV and rs2000999 were genotyped in a group of 5457 Chinese patients with type 2 diabetes. Associations of rs2000999 with the common Hp CNV, susceptibility to diabetic macrovascular diseases and related metabolic traits were analysed. Furthermore, 886 patients were selected to detect serum Hp levels and to evaluate the correlation between rs2000999 and serum Hp levels. ResultsThe genetic variant rs2000999 was not associated with diabetic macrovascular diseases (P = 0.6109), while subjects carrying the A allele had higher levels of low-density lipoprotein cholesterol (P = 0.0578) and a smaller inter-adventitial diameter of the common carotid artery (P = 0.0266). Additionally, rs2000999 exhibited strong association with serum Hp levels (P = 2.03 × 10−21). ConclusionsThe genetic variant rs2000999 was not associated with diabetic macrovascular diseases but showed an association with metabolic traits and serum Hp levels in Chinese patients with type 2 diabetes.
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