Safety and antitumour activity of ipatasertib combined with endocrine therapy and a CDK4/6 inhibitor in HR+/HER2- metastatic breast cancer (TAKTIC): a single-centre, open-label, phase 1b trial.

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Title: Safety and antitumour activity of ipatasertib combined with endocrine therapy and a CDK4/6 inhibitor in HR+/HER2- metastatic breast cancer (TAKTIC): a single-centre, open-label, phase 1b trial.
Authors: Wander SA; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA. Electronic address: swander@mgh.harvard.edu., Lloyd MR; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Keenan JC; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Scott EC; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Niemierko A; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Spring LM; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Fell GG; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Shin J; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Isakoff SJ; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Moy B; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Ryan L; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Padden S; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Fisher E; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Newton A; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Habin KR; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Viscosi-Spieler ET; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Scarpetti L; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Varkaris A; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Ellisen LW; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Dubash T; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Che D; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Patel PS; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., de la Cruz FF; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Sutaria DS; Genentech, South San Francisco, CA, USA., Sane RS; Genentech, South San Francisco, CA, USA., Micalizzi DS; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Maheswaran S; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Haber DA; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Juric D; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA., Bardia A; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA.
Source: The Lancet. Oncology [Lancet Oncol] 2026 May; Vol. 27 (5), pp. 580-591.
Publication Type: Journal Article; Clinical Trial, Phase I
Journal Info: Publisher: Lancet Pub. Group Country of Publication: England NLM ID: 100957246 Publication Model: Print Cited Medium: Internet ISSN: 1474-5488 (Electronic) Linking ISSN: 14702045 NLM ISO Abbreviation: Lancet Oncol Subsets: MEDLINE
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Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA.<br /><searchLink fieldCode="AU" term="%22Dubash+T%22">Dubash T</searchLink>; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA.<br /><searchLink fieldCode="AU" term="%22Che+D%22">Che D</searchLink>; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA.<br /><searchLink fieldCode="AU" term="%22Patel+PS%22">Patel PS</searchLink>; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA.<br /><searchLink fieldCode="AU" term="%22de+la+Cruz+FF%22">de la Cruz FF</searchLink>; Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA.<br /><searchLink fieldCode="AU" term="%22Sutaria+DS%22">Sutaria DS</searchLink>; Genentech, South San Francisco, CA, USA.<br /><searchLink fieldCode="AU" term="%22Sane+RS%22">Sane RS</searchLink>; 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