Phase Ib/II Study of LY2780301 in Combination With Weekly PACLITAXEL in HER2-metastatic Breast Cancer

Summary

The overall rationale of this study evaluating tolerance and efficacy of LY2780301 in combination with paclitaxel in HER2-negative, inoperable locally advanced or metastatic breast cancer (MBC) is based on : * the medical need in this population with either hormonal-resistant or unsensitive and/or rapidly progressive disease * the preclinical evidences for involvement of PI3K/AKT pathway in tumor progression and drug resistance, including taxanes as well as its potential reversion by AKT inhibition * the high level of frequency of PI3K/AKT activation in HER2-negative MBC * the in vitro and in vivo preclinical activity of LY2780301, and its synergistic combination with various anticancer agents, including taxanes * the favourable profile of tolerance of LY2780301 in phase I trial Weekly paclitaxel is conventionally administered at 80 mg/m²/week and is a standard treatment in breast cancer (BC) As described above, LY2780301 500 mg once daily has been established as the RP2D in phase I single agent trial. Evidence of pharmacodynamic activity was noted at 400-500 mg QD. Conservatively, the first dose level to be explored will be LY2780301 400 mg QD and paclitaxel 70 mg/m²/week.

Timeline

Start

2014-01

Primary completion

2017-05

Completion

2018-12-12

Outcome

Outcome not reported

Stopped: “Drug development stopped”

Publications

• Results Vicier C, Sfumato P, Isambert N, Dalenc F, Robert M, Levy C, Rezai K, Provansal M, Adelaide J, Garnier S, Guille A, Carbuccia N, Popovici C, Charafe-Jauffret E, Chaffanet M, Birnbaum D, Pakradouni J, Bertucci F, Boher JM, Sabatier R, Goncalves A. TAKTIC: A prospective, multicentre, uncontrolled, phase IB/II study of LY2780301, a p70S6K/AKT inhibitor, in combination with weekly paclitaxel in HER2-negative advanced breast cancer patients. Eur J Cancer. 2021 Dec;159:205-214. doi: 10.1016/j.ejca.2021.09.040. Epub 2021 Nov 12.
• Results Sabatier R, Vicier C, Garnier S, Guille A, Carbuccia N, Isambert N, Dalenc F, Robert M, Levy C, Pakradouni J, Adelaide J, Chaffanet M, Sfumato P, Mamessier E, Bertucci F, Goncalves A. Circulating tumor DNA predicts efficacy of a dual AKT/p70S6K inhibitor (LY2780301) plus paclitaxel in metastatic breast cancer: plasma analysis of the TAKTIC phase IB/II study. Mol Oncol. 2022 May;16(10):2057-2070. doi: 10.1002/1878-0261.13188. Epub 2022 Mar 30.

Drugs

Indications