Treatment of plaque psoriasis with the two-compound product calcipotriol/betamethasone dipropionate versus both monotherapies: An immunohistochemical study

摘要

The combination of calcipotriol (Ccp) and topical corticosteroids increases efficacy and reduces side effects as compared to monotherapies. Previous studies suggest that such combinations may have an added value with respect to reduction of Tt-cell subsets. Aa two-compound product consisting of Ccp and betamethasone dipropionate (BD) has become available for the treatment of psoriasis and is clinically superior to both monotherapies. No immunohistochemical data are available on the in vivo effects of the two-compound formulation versus monotherapy with respect to the three key processes in psoriasis pathogenesis: epidermal proliferation, epidermal differentiation and inflammation. Ttherefore, 18 patients were treated with the two-compound product, Cp monotherapy or BD monotherapy for 6 weeks and biopsies were taken before and after 4 and 6 weeks of treatment. Tthese biopsies were stained immunohistochemically and analysed (semi)quantitatively. Aall treatments decreased the number of Ki-67+ cells and increased the keratin 15+ staining. Aa more pronounced reduction of epidermal and dermal Tt-cell markers and human beta defensin-2 was seen following combination treatment, compared with both monotherapies. In conclusion, the investigated markers of the skin immune system and epidermal proliferation indicated an added value of the two-compound product over both monotherapies.