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Rivista di Dermatologia e Malattie Sessualmente Trasmesse

Official Journal of the Italian Society of Dermatology and Sexually Transmitted Diseases
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Giornale Italiano di Dermatologia e Venereologia 2016 Sep 14


lingua: Inglese

Biomolecular index of therapeutic efficacy in psoriasis treated by anti-TNF alpha agents

Luca BIANCHI 1, Gaetana COSTANZA 2, Elena CAMPIONE 1, 4, Manuela RUZZETTI 1, Alessandro Di STEFANI 1, Laura DILUVIO 4, Emiliano GIARDINA 2, Raffaella CASCELLA 2, Paola CORDIALI-FEI 3, Claudio BONIFATI 3, Andrea CHIRICOZZI 5, Giuseppe NOVELLI 2, Fabrizio ENSOLI 3, Augusto ORLANDI 2, 4

1 Department of Dermatology, University of Rome Tor Vergata, Rome, Italy; 2 Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy; 3 Clinical Pathology & Microbiology and Clinical Dermatology, Istituto San Gallicano, Rome, Italy; 4 Policlinic of University Tor Vergata of Rome, Rome, Italy; 5 Department of Dermatology, University of Pisa, Pisa, Italy


BACKGROUND: Clinical or quality of life assessments are currently available for psoriasis severity evaluation and therapeutic response. Laboratory scores focused to measure and follow treatment efficacy are lacking at present.
METHODS: Design a microscopic and biomolecular score to monitor skin disease severity and clinical response to anti-psoriatic treatments. A susceptibility gene analysis on cellular retinoic acid binding protein-II (CRABP-II), acting on keratinocyte differentiation, was also performed. A Molecular Index of Therapeutic Efficacy (MITE) was defined by assembling morphometric/semiquantitative measurement of epidermal thickness, immunohistochemical Ki-67, keratin17 and CRABP-II expression of lesional and non-lesional psoriatic skin biopsies before and after anti-tumor necrosis factor (TNF)α therapies. A 0-12 MITE score was correlated with Psoriasis Area and Severity Index (PASI)/Psoriasis Disability Index (PDI) scores and inflammation. Three CRABP- II SNPs were analyzed by TaqMan assay.
RESULTS: All parameters were highly expressed in psoriatic lesions and reduced after 12 weeks of anti-TNFα treatments. MITE score strongly correlated with PASI and PDI values either before or after therapies (p<<0.001 and p<0.001, respectively). Conversely, MITE values did not change after treatments of non-responder patients. CRABP-II did not resulted a psoriatic susceptibility gene for the SNPs probes analyzed.
CONCLUSIONS: MITE score variations corresponded to the patients’ clinical improvement following anti-TNFα treatments, with significant statistical correlation among MITE, PASI and PDI scores. If confirmed in a larger series and/or in different hyperproliferative and inflammatory dermatoses, MITE score could be proposed as additional monitoring system to evaluate treatment protocols in skin disorders and targeted biomolecular pathways supporting clinical efficacy.

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Bianchi L, Costanza G, Campione E, Ruzzetti M, Stefani AD, Diluvio L, et al. Biomolecular index of therapeutic efficacy in psoriasis treated by anti-TNF alpha agents. G Ital Dermatol Venereol 2016 Sep 14. 

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