Short Communication | Published:

Resequencing of the characterised CTGF gene to identify novel or known variants, and analysis of their association with diabetic nephropathy

Journal of Human Genetics volume 51, pages 383386 (2006) | Download Citation

Abstract

Connective tissue growth factor (CTGF) has been implicated in the pathogenesis of diabetic nephropathy; however, to date there have been no reports of genomic analysis on this gene. The CTGF gene was comprehensively screened using WAVE (dHPLC) technology and direct capillary sequencing. Single nucleotide polymorphisms (SNPs) with minor allele frequencies greater than 5% were further investigated in an Irish, type 1 diabetic population. The case-control collection consisted of 272 diabetics with nephropathy and 367 non-nephropathic diabetic controls who were genotyped using TaqMan and Pyrosequencing technologies. Ten SNPs were identified, of which seven were novel. Four SNPs are located in the promoter, one in exon 2, two in intron 2 and three in the 3′ untranslated region. Based on in silico analysis, three SNPs, c.−650G>C, c.−484T>C and c.247G>C, are potentially functional. Subsequent statistical analysis for common SNPs, c.−650G>C, c.−420InsT, c.−220G>C, c.289+94T>C and c.289+98T>C, in the case-control study revealed no significant differences in genotype or allele frequencies. CTGF has emerged as a biological candidate gene for diabetic nephropathy; however, no significant association was detected between common CTGF SNPs and nephropathy in this population.

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Affiliations

  1. Nephrology Research Group, Queen's University of Belfast, c/o Regional Genetics Centre, Level A, Tower Block, Belfast City Hospital, Lisburn Road, BT9 7AB Belfast, Northern Ireland

    • Amy Jayne McKnight
    • , David A Savage
    •  & A Peter Maxwell
  2. Department of Epidemiology and Public Health, Queen's University of Belfast, Belfast, Northern Ireland

    • Chris C Patterson
  3. Dublin Molecular Medicine Centre, Conway Institute, Dublin, Ireland

    • Hugh R Brady

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Corresponding author

Correspondence to Amy Jayne McKnight.

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DOI

https://doi.org/10.1007/s10038-006-0368-7

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