2021
Pharmacokinetic (PK) analyses in CSF and plasma from TBCRC049, an ongoing trial to assess the safety and efficacy of the combination of tucatinib, trastuzumab and capecitabine for the treatment of leptomeningeal metastasis (LM) in HER2 positive breast cancer.
Stringer-Reasor E, O'Brien B, Topletz-Erickson A, White J, Lobbous M, Riley K, Childress J, LaMaster K, Melisko M, Morikawa A, De Groot J, Krop I, Valero V, Rimawi M, Wolff A, Tripathy D, Lin N, Murthy R. Pharmacokinetic (PK) analyses in CSF and plasma from TBCRC049, an ongoing trial to assess the safety and efficacy of the combination of tucatinib, trastuzumab and capecitabine for the treatment of leptomeningeal metastasis (LM) in HER2 positive breast cancer. Journal Of Clinical Oncology 2021, 39: 1044-1044. DOI: 10.1200/jco.2021.39.15_suppl.1044.Peer-Reviewed Original ResearchLeptomeningeal metastasesBrain metastasesBreast cancerPharmacokinetic analysisPhase 2 single-arm studyHER2-positive breast cancerCombination of tucatinibNew brain metastasesSingle-arm studyPositive breast cancerTyrosine kinase inhibitorsHigh interindividual variabilityMetastatic HER2Accrual goalEligible patientsMetastatic settingPrimary endpointOverall survivalOmmaya reservoirOngoing trialsPlasma concentrationsCapecitabinePatientsDay 1PK samplesHER2CLIMB-04: Phase 2 open label trial of tucatinib plus trastuzumab deruxtecan in patients with HER2+ unresectable locally advanced or metastatic breast cancer with and without brain metastases (trial in progress).
Krop I, Ramos J, Zhang C, Hamilton E. HER2CLIMB-04: Phase 2 open label trial of tucatinib plus trastuzumab deruxtecan in patients with HER2+ unresectable locally advanced or metastatic breast cancer with and without brain metastases (trial in progress). Journal Of Clinical Oncology 2021, 39: tps1097-tps1097. DOI: 10.1200/jco.2021.39.15_suppl.tps1097.Peer-Reviewed Original ResearchHuman epidermal growth factor receptor 2Metastatic breast cancerProgression-free survivalDisease control rateDuration of responseBrain metastasesOverall survivalT-DXdEpidermal growth factor receptorRECIST v1.1Metastatic settingTrastuzumab deruxtecanBreast cancerOpen-label phase 2 trialPhase 2 open-label trialSmall molecule tyrosine kinase inhibitorsTopoisomerase I inhibitor payloadTreatment of HER2Epidermal growth factor receptor 2Molecule tyrosine kinase inhibitorsHuman epidermal growth factor receptorActive brain metastasesCombination of tucatinibSolid Tumors v1.1Objective response rate
2020
Phase I dose-escalation trial of tucatinib in combination with trastuzumab in patients with HER2-positive breast cancer brain metastases
Filho O, Leone JP, Li T, Tan-Wasielewski Z, Trippa L, Barry WT, Younger J, Lawler E, Walker L, Freedman RA, Tolaney SM, Krop I, Winer EP, Lin NU. Phase I dose-escalation trial of tucatinib in combination with trastuzumab in patients with HER2-positive breast cancer brain metastases. Annals Of Oncology 2020, 31: 1231-1239. PMID: 32461105, DOI: 10.1016/j.annonc.2020.05.014.Peer-Reviewed Original ResearchConceptsClinical benefit rateHER2-positive brain metastasesAlanine aminotransferase elevationCohort ABrain metastasesCohort BAminotransferase elevationBreast cancerHER2-positive breast cancer brain metastasesPhase I dose-escalation trialMedian progression-free survivalBreast cancer brain metastasesCommon dose-limiting toxicityI dose-escalation trialHER2-positive breast cancerCombination of tucatinibSecondary end pointsCancer brain metastasesDose-escalation trialProgression-free survivalDose-limiting toxicityMetastatic breast cancerBrain radiationObjective responseIntracranial activity