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Hsp90 phase II candidate2019-04-30T09:21:24+01:00

Project Description

Heat shock protein 90 (Hsp90) – phase II candidate

Brough et al., J. Med. Chem. 2008

Brough et al., Inhibitors of Molecular Chaperones as Therapeutic Agents, Ch. 8, 2013

Eccles et al., Cancer Res. 2008

A combination of fragment, virtual and medium-throughput screening identified resorcinol pyrazole hit CCT-018159, which underwent structure-guided optimisation to obtain NVP-AUY922/ VER-52296. It was demonstrated that NVP-AUY922 has good pharmacokinetic properties, is efficacious, and is well tolerated, when administered as a single agent once-weekly in mouse xenograft models.

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X-ray crystal structures of compounds bound to the ATP binding site of the N-terminal domain of human Hsp90R (PDB code NVP-AUY922/ Hsp90R: 2VCI)

NVP-AUY922 entered Phase I clinical trials in 2007, where it was administered by intravenous infusion in a once-weekly schedule. The Phase I data built confidence in moving the compound into global Phase II trials. In a study where the pharmacokinetic and pharmacodynamic relationship was evaluated in 36 patients, a dose-dependent induction of Hsp70 was observed in patient-derived PBMCs and the up-regulation observed at 40 mg/m2 exceeded that observed in BT474 tumour-bearing mice. Doses from 2 to 80 mg/m2 have been evaluated in a number of Phase I trials and the recommended Phase II dose was set at 70 mg/m2. NVP-AUY922 achieved clinical Proof of Concept (PoC) in April 2011.

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