The article presents a study on the therapeutic effect of intact and preconditioned human umbilical cord blood mesenchymal stem cells (hUCB-MSCs) in a mouse model of imiquimod (IMQ)-induced psoriasis-like skin inflammation. Both intact and preconditioned hUCB-MSCs effectively reduced skin inflammation. hUCB-MSCs preconditioned with IL-22 and TNF-α showed significant ...