How does Ilumya work to treat psoriasis?
Ilumya works by binding selectively to interleukin-23 (IL-23) which is a naturally occurring cytokine. Cytokines are substances released by cells of the immune system that influence other cells. IL-23 plays a key role in promoting inflammation and regulating other cytokines (such as IL-17) and inflammatory substances, such as TNF-α3-7. IL-23 is thought to be crucial in regulating inflammation that stems from infection or chronic autoimmune conditions, such as psoriasis. In psoriasis, IL-23 maintains immune cells in an inflammatory state.
By blocking the effects of IL-23, Ilumya helps control the release of IL-17 and TNF-α, which reduces inflammation. It also decreases how many inflammatory cells are present within psoriatic lesions and helps prevent plaque formation and resolves tissue damage. Because it precisely targets the inflammatory pathway at IL-23, it does not modify the effects of another cytokine, IL-12 which helps to protect against infection and cancer. Ilumya can still increase a person’s risk of infection or cause reactivation of tuberculosis; however, the risk for serious infection is low (0.3%) and similar to placebo (a medicine with no active ingredient in it).
Ilumya belongs to the class of medicines known as interleukin inhibitors. It may also be called a human monoclonal antibody.
In March 2018, the FDA approved Ilumya (tildrakizumab-asmn) for moderate-to-severe plaque psoriasis in adults who are candidates for systemic treatment or phototherapy (ultraviolet or UV light).
Psoriasis is an autoimmune skin condition that causes raised, itchy, red lesions and scales that can occur on the elbows, scalp, knees, and lower back.
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