Adavosertib (MK-1775)
Mechanism of action
From the NCI Drug Dictionary: A small molecule inhibitor of the tyrosine kinase WEE1 with potential antineoplastic sensitizing activity. Adavosertib selectively targets and inhibits WEE1, a tyrosine kinase that phosphorylates cyclin-dependent kinase 1 (CDK1, CDC2) to inactivate the CDC2/cyclin B complex. Inhibition of WEE1 activity prevents the phosphorylation of CDC2 and impairs the G2 DNA damage checkpoint. This may lead to apoptosis upon treatment with DNA damaging chemotherapeutic agents. Unlike normal cells, most p53 deficient or mutated human cancers lack the G1 checkpoint as p53 is the key regulator of the G1 checkpoint and these cells rely on the G2 checkpoint for DNA repair to damaged cells. Annulment of the G2 checkpoint may therefore make p53 deficient tumor cells more vulnerable to antineoplastic agents and enhance their cytotoxic effect.
Preliminary data
Ovarian cancer
- PHL-093: Lheureux S, Cristea MC, Bruce JP, Garg S, Cabanero M, Mantia-Smaldone G, Olawaiye AB, Ellard SL, Weberpals JI, Wahner Hendrickson AE, Fleming GF, Welch S, Dhani NC, Stockley T, Rath P, Karakasis K, Jones GN, Jenkins S, Rodriguez-Canales J, Tracy M, Tan Q, Bowering V, Udagani S, Wang L, Kunos CA, Chen E, Pugh TJ, Oza AM. Adavosertib plus gemcitabine for platinum-resistant or platinum-refractory recurrent ovarian cancer: a double-blind, randomised, placebo-controlled, phase 2 trial. Lancet. 2021 Jan 23;397(10271):281-292. link to original article PubMed NCT02101775
Also known as
- Code names: AZD-1775, MK-1775