title: Seasonal variations of DNA damage in human lymphocytes: correlation with different environmental variables.
abstract: Several types of DNA damage, including DNA breaks and DNA base oxidation, display a seasonal trend. In the present work, a sample of 79 healthy subjects living in the city of Florence, Italy, was used to analyse this effect. Three possible causative agents were taken into consideration: solar radiation, air temperature and air ozone level. DNA damage was measured in isolated human lymphocytes at different times during the year and the observed damage was correlated with the levels of these three agents in the days preceding blood sampling. Three time windows were chosen: 3, 7 and 30 days before blood sampling. DNA strand breaks and the oxidized purinic bases cleaved by the formamidopyrimidine glycosylase (FPG sites) were measured by means of the comet assay. The results of multivariate regression analysis showed a positive correlation between lymphocyte DNA damage and air temperature, and a less strong correlation with global solar radiation and air ozone levels.
authors.affiliation: Dipartimento di Farmacologia Preclinica e Clinica, Università di Firenze, Viale Pieraccini 6, 50139 Firenze, Italy.
authors.forename: Lisa
authors.initials: L
authors.lastname: Giovannelli
authors.forename: Vanessa
authors.initials: V
authors.lastname: Pitozzi
authors.forename: Silvia
authors.initials: S
authors.lastname: Moretti
authors.forename: Vieri
authors.initials: V
authors.lastname: Boddi
authors.forename: Piero
authors.initials: P
authors.lastname: Dolara
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002460:Cell Line; D004249:DNA Damage; D005260:Female; D006801:Humans; D007558:Italy; D008214:Lymphocytes / Q000648:ultrastructure*; D008297:Male; D008875:Middle Aged; D012621:Seasons