title: Possible association between actinic keratosis and the rs7208422 (c.917A→T, p.N306l) polymorphism of the EVER2 gene in patients without epidermodysplasia verruciformis.
abstract: BACKGROUND
  Mutations of the EVER1 and EVER2 genes cause epidermodysplasia verruciformis (EV), a genodermatosis associated with squamous cell carcinoma (SCC). Recently, it has been found that the rs7208422 (c.917A→T, p.N306l) polymorphism in the EVER2 gene is related to an increased risk of SCC in patients with conditions other than EV. We hypothesized that this polymorphism might be also associated with actinic keratoses (AK).
  
  
  OBJECTIVE
  To determine whether the rs7208422 polymorphism of the EVER2 gene is associated with AK in non-EV patients.
  
  
  METHODS
  We genotyped rs7208422 in 65 patients with AK and 274 controls, using reverse transcription PCR.
  
  
  RESULTS
  We detected a trend towards an association between AK and the TT genotype of rs7208422; the frequency of this genotype was 38.5% in patients with AK and 26.3% in controls (OR  =  1.75, P  <  0.06 for recessive model of inheritance). We also found an association between rs7208422 TT and both the age at which AK appeared and the extent of the AK. This variant was more frequent in patients who had AK onset before the age of 70 years compared with those whose age of onset was above 70 years (OR = 3.14, P = 0.03 for the recessive model; OR = 2.05, P = 0.04 for allelic comparison) and more frequent in AK involving > 3 body areas (OR = 3.14, P = 0.03 for the recessive model; OR = 2.34, P = 0.01 for allelic comparison). These associations remained significant in a multivariate regression analysis, showing that both parameters were independently associated with the TT genotype (P = 0.031).
  
  
  CONCLUSIONS
  This study indicates a potential role of the rs7208422 (c.917A→T, P.N306l) polymorphism of the EVER2 gene in AK.
authors.affiliation: Department of Dermatology and Immunodermatology, Medical University of Warsaw, Warsaw, Poland.
authors.forename: A
authors.initials: A
authors.lastname: Kalinska-Bienias
authors.forename: G
authors.initials: G
authors.lastname: Kostrzewa
authors.forename: M
authors.initials: M
authors.lastname: Malejczyk
authors.forename: R
authors.initials: R
authors.lastname: Ploski
authors.forename: S
authors.initials: S
authors.lastname: Majewski
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D016022:Case-Control Studies; D005260:Female; D005787:Gene Frequency; D005838:Genotype; D006801:Humans; D055623:Keratosis, Actinic / Q000235:genetics*; D008297:Male; D008565:Membrane Proteins / Q000235:genetics*; D008875:Middle Aged; D015999:Multivariate Analysis; D011110:Polymorphism, Genetic
chemical_list: D008565:Membrane Proteins; C470315:TMC8 protein, human