Associations between gout tophus and polymorphisms 869T/C and - 509C/T in transforming growth factor β1 gene

S. J. Chang*, C. J. Chen, F. C. Tsai, H. M. Lai, P. C. Tsai, M. H. Tsai, Y. C. Ko

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

32 Scopus citations


Objectives. To investigate the associations between gout tophus and polymorphisms 869T/C and -509C/T in TGF-β1 gene. Methods. The polymorphisms 869T/C and -509C/T were determined in 73 gout patients and 114 healthy controls among male Taiwanese using the PCR-restriction fragment length polymorphism method. Each patient was matched with 1-2 controls by age within 1-2 yrs. The tophus number was measured from all the patients' arms and legs. Results. Neither 869T/C nor -C/T showed a significant association between patients and controls in the proportions of genotypes, allele frequency or dominant and recessive models. The mean number of tophi for all patients was 1.53 ± 3.44, showing a significant difference in distribution among the genotypes at polymorphism 869T/C (P = 0.006), but not those in polymorphism -509C/T (P > 0.05). Those carrying genotype CC at polymorphism 869T/C have a mean number of tophi 0.35 (± 1.11), which is significantly lower than those carrying genotype TT (3.73 ± 4.67; P < 0.05). Those with genotype TT at polymorphism 869T/C also had 11.06 times the likelihood of having at least one tophus compared with the genotype CC after adjustment of hyperuricaemia (95% CI = 1.84, 66.36; P = 0.009). However, except for the tophus number, these two polymorphisms did not show any significant association with the clinical characteristics or biochemical markers. Conclusions. The polymorphism 869T/C in TGF-β1 gene has a significant association with the occurrence of tophus in gout patients.

Original languageEnglish
Pages (from-to)617-621
Number of pages5
JournalRheumatology (United Kingdom)
Issue number5
StatePublished - 05 2008


  • Gout
  • Polymorphism
  • TGF
  • Tophus


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