Impact of TNF haplotypes in the physical course of acne vulgaris

Abstract

Background: The role of single-nucleotide polymorphisms (SNPs) of the TNF gene in acne vulgaris remains controversial.

Methods: Genomic DNA was isolated from 185 patients with acne vulgaris and 165 healthy controls. SNPs at positions -376, -308 and -238 of the promoter region of TNF were defined.

Results: The frequency of the GAG haplotype was greater among patients (16.8%) than among controls with borderline significance (9.7%, p = 0.059). Male carriers of haplotypes other than GGG presented acne vulgaris at a later age than carriers of the GGG haplotype. No effect of the GAG haplotype on the frequency of acne conglobata was found among women with polycystic ovary syndrome.

Conclusions: Carriage of the GAG haplotype of TNF is linked with borderline susceptibility to acne vulgaris. The GGG haplotype is related with earlier disease onset in male patients.