Zimlovisertib

**Semantic type:** Pharmacologic Substance

**Definition:** An orally bioavailable, small molecule, reversible inhibitor of interleukin-1 receptor-associated kinase 4 (IRAK4), with potential immunomodulating and anti-inflammatory activities. Upon oral administration, zimlovisertib targets, binds to, and blocks the kinase activity of IRAK4. This inhibits IRAK4-mediated signaling, prevents the activation of IRAK4-mediated nuclear factor-kappa B (NF-kB) signaling and decreases the expression of inflammatory cytokines. This may inhibit inflammation and immune-mediated cell destruction in inflammatory and auto-immune diseases where toll-like receptor (TLR) or interleukin 1 receptor (IL-1R) signaling is overactivated and MYD88 is dysregulated. IRAK4, a serine/threonine-protein kinase that plays a key role in both the TLR and IL-1R signaling pathways, is activated though the adaptor protein MYD88 and links the TLR and IL-1R signaling pathway to the NF-kB pathway.

**Synonyms:** - PF 06650833 - PF-06650833 - PF06650833 - ZIMLOVISERTIB