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  • Title: Topical treatment of mild to moderate plaque psoriasis with 0.3% tacrolimus gel and 0.5% tacrolimus cream: the effect on SUM score, epidermal proliferation, keratinization, T-cell subsets and HLA-DR expression.
    Author: Vissers WH, van Vlijmen I, van Erp PE, de Jong EM, van de Kerkhof PC.
    Journal: Br J Dermatol; 2008 Apr; 158(4):705-12. PubMed ID: 18284400.
    Abstract:
    BACKGROUND: Tacrolimus gel 0.3% and tacrolimus cream 0.5% were studied and compared with calcipotriol ointment 0.005%, as topical treatment for mild to moderate plaque psoriasis. Tacrolimus is able to inhibit several cellular processes thought to be important in the pathogenesis of psoriasis, e.g. the transcription of proinflammatory cytokines, keratinocyte hyperproliferation and the expression of HLA-DR in lesional psoriatic skin. METHOD: In the present study we investigated the effects of preparations of tacrolimus and calcipotriol ointment on SUM score, hyperproliferation (Ki67-positive keratinocytes), keratinization (percentage keratin 10 (K10)-positive epidermal surface), T-cell subsets (CD4, CD8, CD45RO, CD45RA, CD2, CD25), cells expressing natural killer receptors and HLA-DR expression. The following three topical treatments were studied in chronic plaque psoriasis over a 12-week treatment period: calcipotriol ointment 0.005% twice daily, tacrolimus gel 0.3% twice daily and tacrolimus cream 0.5% twice daily. RESULTS: The mean reductions in SUM score between day 0 and week 12 for calcipotriol ointment, tacrolimus gel and cream were significant. Calcipotriol ointment, and tacrolimus gel and cream had a comparable effect on epidermal proliferation (Ki67-positive cells), but calcipotriol is significantly more effective in normalizing differentiation (K10-positive epidermal surface). Calcipotriol and tacrolimus gel both reduced several lesional T-cell subsets significantly, whereas the effect induced by tacrolimus cream was modest. CONCLUSIONS: Calcipotriol and tacrolimus gel are comparable in reducing the SUM score, the number of Ki67-positive cells and T-cell subsets and HLA-DR expression, although calcipotriol induces a more substantial improvement of keratinization.
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