title: CTACK /CCL27 expression in psoriatic skin and its modification after administration of etanercept.
abstract: BACKGROUND
  Tumour necrosis factor-alpha upregulates the expression of a cutaneous T cell-attracting chemokine (CTACK/CCL27), that promotes migration of cutaneous lymphocyte-associated antigen-positive lymphocytes into the skin. The role of CTACK/CCL27 in pathogenesis of psoriasis has recently been documented but no data are available at the present time on its modification in psoriatic cutaneous tissue after administration of etanercept.
  
  
  OBJECTIVE
  To evaluate modifications of CTACK/CCL27 expression in skin of patients with psoriasis after administration of etanercept and their relation with disease activity.
  
  
  METHODS
  Twenty-two patients with moderate to severe psoriasis underwent clinical, histological and immunohistochemical evaluations of disease activity at baseline and at 12 and 24 weeks after starting treatment with etanercept.
  
  
  RESULTS
  All selected patients experienced an improvement of Psoriasis Area and Severity Index (PASI) score (P < 0.001) and Dermatology Life Quality Index score (P < 0.001) during the treatment. Skin histological abnormalities showed statistically significant modifications during treatment (P < 0.001). Immunohistochemical expression of CTACK/CCL27 decreased significantly (P < 0.001) and its relation with final PASI score was statistically significant (P < 0.05); the pattern of distribution of CTACK/CCL27 immunoreactivity significantly moved from diffuse and predominantly suprabasal to basal (P < 0.001) and the restoration of basal distribution of CTACK/CCL27 was also significantly related to clinical improvement of cutaneous disease (P < 0.001).
  
  
  CONCLUSIONS
  Etanercept induces a clinical and histological improvement of psoriatic disease, promoting a reduction in CTACK/CCL27 cutaneous immunostaining and favouring the restoration of physiological CTACK/CCL27 epidermal expression. Moreover, CTACK/CCL27 reduction in cutaneous expression during administration of etanercept could be considered a favourable prognostic marker.
authors.affiliation: Dermatological Clinic, Department of Medical Sciences, Ancona Hospital, Polytechnic University of Marche Region, Via Conca 71, Ancona, Italy. a.campanati@ao-umbertoprimo.marche.it
authors.forename: A
authors.initials: A
authors.lastname: Campanati
authors.forename: G
authors.initials: G
authors.lastname: Goteri
authors.forename: O
authors.initials: O
authors.lastname: Simonetti
authors.forename: G
authors.initials: G
authors.lastname: Ganzetti
authors.forename: K
authors.initials: K
authors.lastname: Giuliodori
authors.forename: D
authors.initials: D
authors.lastname: Stramazzotti
authors.forename: D
authors.initials: D
authors.lastname: Morichetti
authors.forename: M L
authors.initials: ML
authors.lastname: Bernardini
authors.forename: B
authors.initials: B
authors.lastname: Mannello
authors.forename: G
authors.initials: G
authors.lastname: Fabris
authors.forename: A
authors.initials: A
authors.lastname: Offidani
mesh_terms: D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000627:therapeutic use*; D054425:Chemokine CCL27 / Q000378:metabolism*; D000068800:Etanercept; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000627:therapeutic use*; D007150:Immunohistochemistry; D008297:Male; D011565:Psoriasis / Q000188:drug therapy* / Q000378:metabolism*; D019707:Receptors, Chemokine; D018124:Receptors, Tumor Necrosis Factor / Q000627:therapeutic use*; D016896:Treatment Outcome
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; C492276:CCL27 protein, human; D054425:Chemokine CCL27; D007074:Immunoglobulin G; D019707:Receptors, Chemokine; D018124:Receptors, Tumor Necrosis Factor; D000068800:Etanercept