AI Article Synopsis

  • PI3K is a critical target for cancer therapies due to its role in various cancers, making its inhibition a viable treatment strategy.
  • Researchers optimized imidazo [1,2-a] pyrazines, leading to the discovery of compound 14 (ETP-46321), known for its strong activity and favorable pharmacokinetics when taken orally.
  • In studies, ETP-46321 effectively reduced AKT(Ser473) phosphorylation in a time-dependent manner, correlating with its presence in tumor tissues and demonstrating significant tumor growth inhibition in a mouse model with a K-Ras mutation.

Article Abstract

Phosphoinositide-3-kinase (PI3K) is an important target for cancer therapeutics due to the deregulation of this signaling pathway in a wide variety of human cancers. Herein, we describe the optimization of imidazo [1,2-a] pyrazines, which allow us to identify compound 14 (ETP-46321), with potent biochemical and cellular activity and good pharmacokinetic properties (PK) after oral dosing. ETP-46321 PK/PD studies showed time dependent downregulation of AKT(Ser473) phosphorylation, which correlates with compound levels in tumor tissue and demonstrating to be efficacious in a GEMM mouse tumor model driven by a K-Ras(G12V) oncogenic mutation. Treatment with ETP-46321 resulted in significant tumor growth inhibition.

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http://dx.doi.org/10.1016/j.bmcl.2012.03.090DOI Listing

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Identification of novel PI3K inhibitors through a scaffold hopping strategy.

Bioorg Med Chem Lett

November 2017

Experimental Therapeutics Programme, Spanish National Cancer Research Centre (CNIO), C/Melchor Fernández Almagro 3, E-28029 Madrid, Spain. Electronic address:

A scaffold hopping strategy, including intellectual property availability assessment, was successfully applied for the discovery of novel PI3K inhibitors. Compounds were designed based on the chemical structure of the lead compound ETP-46321, a potent PI3K inhibitor, previously reported by our group. The new generated compounds showed good in vitro potency and selectivity, proved to inhibit potently the phosphorylation of AKT in cells and demonstrated to be orally bioavailable, thus becoming potential back-up candidates for ETP-46321.

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Inhibitors of PI3K signaling are of great therapeutic interest in oncology. The phosphoinositide-3-kinase signaling pathway is activated in a variety of solid and non-solid tumors. We have identified an imidazopyrazine derivative, ETP-46321, as a potent inhibitor of PI3Kα [Formula: see text].

View Article and Find Full Text PDF
Article Synopsis
  • PI3K is a critical target for cancer therapies due to its role in various cancers, making its inhibition a viable treatment strategy.
  • Researchers optimized imidazo [1,2-a] pyrazines, leading to the discovery of compound 14 (ETP-46321), known for its strong activity and favorable pharmacokinetics when taken orally.
  • In studies, ETP-46321 effectively reduced AKT(Ser473) phosphorylation in a time-dependent manner, correlating with its presence in tumor tissues and demonstrating significant tumor growth inhibition in a mouse model with a K-Ras mutation.
View Article and Find Full Text PDF

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