The cytotoxic and immunomodulatory mechanisms of photodynamic therapy evaluated in in vitro studies on cultures of selected skin cell lines

Significance The aim of the study is to evaluate the cytotoxic and immunomodulatory effects of HYP-PDT in vitro studies on cultures of selected skin cell lines, as a possibility of using PDT for patients with atopic dermatitis and psoriasis. Approach Primary Dermal Fibroblast and Primary Epidermal Keratinocytes was used in the study. After incubation the cells were treated with hypericin, exposed to VIS visible light. Then cell viability was determined by the MTT assay and cytokines markings were done with Bio-Plex Pro™ Assay kit and with Bio-Plex Suspension Array System. Results The experiment showed a significant cytotoxic effect of HYP-PDT and in sublethal doses, an immunomodulatory effect manifested in changes in the concentrations of selected cytokines Conclusions The obtaining results confirming the destructive effect of HYP- PDT on the selected, skin cells lines show a possibility of extending the indication for HYP-PDT, for patients with inflammatory skin diseases.