Pictilisib

**Semantic type:** Pharmacologic Substance

**Definition:** A small molecule inhibitor of class I phosphatidylinositol 3 kinase (PI3K), with potential antineoplastic activity. Upon administration, pictilisib selectively binds to PI3K in an ATP-competitive manner, inhibiting the production of the secondary messenger phosphatidylinositol-3,4,5-trisphosphate (PIP3) and activation of the PI3K/Akt signaling pathway. This may result in inhibition of tumor cell growth, motility and survival in susceptible tumor cell populations. Activation of the PI3K/Akt signaling pathway is frequently associated with tumorigenesis; dysregulated PI3K/Akt signaling may contribute to tumor resistance to a variety of antineoplastic agents.

**Synonyms:** - 2-(1H-indazol-4-yl)-6-((4-(methanesulfonyl)piperazin-1-yl)methyl)-4-(morpholin-4-yl)thieno(3,2-d)pyrimidine - 4-(2-(1H-indazol-4-yl)-6-((4-(methylsulfonyl)piperazin-1-yl)methyl)thieno(3,2-d)pyrimidin-4-yl)morpholine - GDC 0941 - GDC-0941 - GDC0941 - PICTILISIB