Abstract: Objective To study the effect of cordycepin on proliferation, apoptosis and inflammatory reaction of human keratinocyte cell line HaCaT induced by TNF-α. Methods HaCaT cells were divided into control group, model group and intervention groups including low, middle, high dose (cordycepin 25 μmol/L, 50 μmol/L and 100 μmol/L, respectively). HaCaT cells were incubated with by 40 μg/L TNF-α in model group and cordycepin intervention group for 24 hours. Then, the cordycepin intervention groups were incubated with corresponding cordycepin for 24 hours. Cell proliferation was detected by CCK-8 method. Apoptosis was detected by flow cytometry. And mRNA expression of interleukin (IL)-8, IL-1β was detected by RT-qPCR. Results After 24 hours of cordycepin incubation, cell proliferation rate decreased (P＜0.05), cell apoptosis rate increased(P＜0.05)and mRNA expression of IL-8 and IL-1β decreased (P＜0.05). Conclusions Cordycepin can inhibit TNF-α-induced proliferation and inflammatory reaction of HaCaT cells and promote apoptosis of these cells.

Key words: human keratinocyte, cordycepin, psoriasis, cell proliferation, inflammation