Discovery of a Potent, Selective, and Orally Available Class I Phosphatidylinositol 3-Kinase (PI3K)/Mammalian Target of Rapamycin (mTOR) Kinase Inhibitor (GDC-0980) for the Treatment of Cancer
Year: 2011
Type: article
Abstract: The discovery of 2 (GDC-0980), a class I PI3K and mTOR kinase inhibitor for oncology indications, is described. mTOR inhibition was added to the class I PI3K inhibitor 1 (GDC-0941) scaffold primarily through the substitution of the indazole in 1 for a 2-aminopyrimidine. This substitution also increased the microsomal stability and the free fraction of compounds as evidenced through a pairwise comparison of molecules that were otherwise identical. Highlighted in detail are analogues of an advanced compound 4 that were designed to improve solubility, resulting in 2. This compound, is potent across PI3K class I isoforms with IC(50)s of 5, 27, 7, and 14 nM for PI3Kα, β, δ, and γ, respectively, inhibits mTOR with a K(i) of 17 nM yet is highly selective versus a large panel of kinases including others in the PIKK family. On the basis of the cell potency, low clearance in mouse, and high free fraction, 2 demonstrated significant efficacy in mouse xenografts when dosed as low as 1 mg/kg orally and is currently in phase I clinical trials for cancer.
Source: Journal of Medicinal Chemistry
DOI: 10.1021/jm2009327
Authors: Daniel P. Sutherlin, Linda Bao, Megan Berry, Georgette Castanedo, Irina Chuckowree, Jenna Dotson, Adrian Folks, Lori Friedman, Richard Goldsmith, Janet Gunzner, Timothy Heffron, John Lesnick, Cristina Lewis, Simon Mathieu, Jeremy Murray, Jim Nonomiya, Jodie Pang, Niel Pegg, Wei Wei Prior, Lionel Rouge, Laurent Salphati, Deepak Sampath, Qingping Tian, Vickie Tsui, Nan Chi Wan, Shumei Wang, BinQing Wei, Christian Wiesmann, Ping Wu, Bing-Yan Zhu, Alan Olivero
Institution: Genentech
Language: English
Subfield: Molecular Biology
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W2008756733