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The promoter polymorphism -232C/G of the PCK1 gene is associated with type 2 diabetes in a UK-resident South Asian population

Rees, Simon D and Britten, Abigail C and Bellary, Srikanth and O'Hare, J Paul and Kumar, Sudhesh and Barnett, Anthony H and Kelly, M Ann (2009) The promoter polymorphism -232C/G of the PCK1 gene is associated with type 2 diabetes in a UK-resident South Asian population. BMC Medical Genetics, 10 (1). p. 83. ISSN 1471-2350

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URL of Published Version: http://dx.doi.org/10.1186/1471-2350-10-83

Identification Number/DOI: 10.1186/1471-2350-10-83

Background: The PCK1 gene, encoding cytosolic phosphoenolpyruvate carboxykinase (PEPCK-C), has previously been implicated as a candidate gene for type 2 diabetes (T2D) susceptibility. Rodent models demonstrate that over-expression of Pck1 can result in T2D development and a single nucleotide polymorphism (SNP) in the promoter region of human PCK1 (-232C/G) has exhibited significant association with the disease in several cohorts. Within the UK-resident South Asian population, T2D is 4 to 6 times more common than in indigenous white Caucasians. Despite this, few studies have reported on the genetic susceptibility to T2D in this ethnic group and none of these has investigated the possible effect of PCK1 variants. We therefore aimed to investigate the association between common variants of the PCK1 gene and T2D in a UK-resident South Asian population of Punjabi ancestry, originating predominantly from the Mirpur area of Azad Kashmir, Pakistan.

Methods: We used TaqMan assays to genotype five tagSNPs covering the PCK1 gene, including the -232C/G variant, in 903 subjects with T2D and 471 normoglycaemic controls.

Results: Of the variants studied, only the minor allele (G) of the -232C/G SNP demonstrated a significant association with T2D, displaying an OR of 1.21 (95% CI: 1.03 - 1.42, p = 0.019).

Conclusion: This study is the first to investigate the association between variants of the PCK1 gene and T2D in South Asians. Our results suggest that the -232C/G promoter polymorphism confers susceptibility to T2D in this ethnic group.

Trial registration: UKADS Trial Registration: ISRCTN38297969.

Type of Work:Article
Date:2009 (Publication)
School/Faculty:Colleges (2008 onwards) > College of Medical & Dental Sciences
Department:Primary care
Subjects:RA Public aspects of medicine
Institution:University of Birmingham
Copyright Holders:BMC
ID Code:325
Refereed:YES
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