Furthermore, IL-17 induces the production of three cytokine groups, each with a specific role. The first group includes cytokines such as IL-36 and IL-17C, which strengthen tissue inflammation.58–61 The second group of cytokines is synergistically induced by IL-17 in combination with TNF-α or IL-22 and includes IL-20,62 a cytokine that directly causes psoriasis-like epidermal alterations