title: Effect of sodium lauryl sulfate (SLS) on in vitro percutaneous penetration of water, hydrocortisone and nickel.
abstract: The dose- and time-related effect of sodium lauryl sulfate (SLS) on in vitro percutaneous penetration was studied using 3 radiolabeled tracer compounds with different physicochemical properties: tritiated water, hydrocortisone and nickel. Human cadaver abdominal skin from caucasian women was used as membrane in static in vitro penetration cells. Simultaneous application of SLS together with 1 of the tracer compounds showed, after 48 h, a significant dose-effect relationship between SLS concentration (0.25%, 2% and 10%) and penetration of tritiated water or nickel (p < 0.001, Spearman), whereas SLS had no significant effect on penetration of hydrocortisone. When 4% SLS was applied as pretreatment, a significant time-effect relationship, after 48 h, was found between pretreatment time (0.5, 2 and 8 h) and penetration of tritiated water. A similar relationship was not found for penetration of nickel or hydrocortisone. Pretreatment of the skin with SLS for 2 h using 3 concentrations (0.25%, 4% and 10%) showed, after 48 h, a significant dose-effect relationship between SLS treatment and penetration of tritiated water or nickel (p < 0.001, Spearman). Pretreatment had no effect on penetration of hydrocortisone. Pretreatment simulates a cleaning-washing situation. The present in vitro skin penetration model, using human cadaver skin, described the dose-effect and time-effect relationships for SLS on the penetration profiles of 3 different compounds. The model may be extended to other compounds with suspected irritant/damaging effect on the skin barrier. It should be kept in mind that the model uses a dead skin membrane without the barrier repair mechanisms of live skin.
authors.affiliation: Department of Dermato-venereology, Odense University Hospital, Denmark.
authors.forename: S
authors.initials: S
authors.lastname: Frankild
authors.forename: K E
authors.initials: KE
authors.lastname: Andersen
authors.forename: G D
authors.initials: GD
authors.lastname: Nielsen
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002102:Cadaver; D004305:Dose-Response Relationship, Drug; D005260:Female; D006801:Humans; D006854:Hydrocortisone / Q000493:pharmacokinetics*; D066298:In Vitro Techniques; D008875:Middle Aged; D009532:Nickel / Q000493:pharmacokinetics*; D012867:Skin / Q000187:drug effects; D012869:Skin Absorption / Q000187:drug effects*; D012967:Sodium Dodecyl Sulfate / Q000494:pharmacology*; D013501:Surface-Active Agents / Q000494:pharmacology*; D013997:Time Factors; D014316:Tritium; D014867:Water / Q000502:physiology*
chemical_list: D013501:Surface-Active Agents; D014867:Water; D014316:Tritium; D012967:Sodium Dodecyl Sulfate; D009532:Nickel; D006854:Hydrocortisone