2023
Multiple PIK3CA mutation clonality correlates with outcomes in taselisib + fulvestrant-treated ER+/HER2–, PIK3CA-mutated breast cancers
Hutchinson K, Chen J, Savage H, Stout T, Schimmoller F, Cortés J, Dent S, Harbeck N, Jacot W, Krop I, Trabucco S, Sivakumar S, Sokol E, Wilson T. Multiple PIK3CA mutation clonality correlates with outcomes in taselisib + fulvestrant-treated ER+/HER2–, PIK3CA-mutated breast cancers. Genome Medicine 2023, 15: 28. PMID: 37101291, PMCID: PMC10131374, DOI: 10.1186/s13073-023-01181-8.Peer-Reviewed Original ResearchConceptsPI3K pathwayBreast cancerK pathwayP110α inhibitionLonger progression-free survivalReceptor tyrosine kinasesProgression-free survivalMetastatic breast cancerComprehensive genomic profilingPI3K pathway genesFurther clinical investigationP110α inhibitorsHigh response rateSolid tumor typesBreast cancer tumorsP110α catalytic subunitClinical trialsClinical investigationIndependent cohortImportant molecular determinantResponse rateTumor typesPIK3CA geneConclusionsOur studyTumor DNA
2020
Phase 2 study of buparlisib (BKM120), a pan-class I PI3K inhibitor, in patients with metastatic triple-negative breast cancer
Garrido-Castro AC, Saura C, Barroso-Sousa R, Guo H, Ciruelos E, Bermejo B, Gavilá J, Serra V, Prat A, Paré L, Céliz P, Villagrasa P, Li Y, Savoie J, Xu Z, Arteaga CL, Krop IE, Solit DB, Mills GB, Cantley LC, Winer EP, Lin NU, Rodon J. Phase 2 study of buparlisib (BKM120), a pan-class I PI3K inhibitor, in patients with metastatic triple-negative breast cancer. Breast Cancer Research 2020, 22: 120. PMID: 33138866, PMCID: PMC7607628, DOI: 10.1186/s13058-020-01354-y.Peer-Reviewed Original ResearchMeSH KeywordsAdultAgedAminopyridinesAntineoplastic Combined Chemotherapy ProtocolsClass I Phosphatidylinositol 3-KinasesDisease ProgressionFemaleHigh-Throughput Nucleotide SequencingHumansMiddle AgedMorpholinesNeoplasm MetastasisPatient SafetyProtein Kinase InhibitorsProteomicsResponse Evaluation Criteria in Solid TumorsSurvival RateTreatment OutcomeTriple Negative Breast NeoplasmsConceptsTriple-negative breast cancerProgression-free survivalPan-class I PI3K inhibitorMetastatic triple-negative breast cancerStable diseasePhase 2 studyBreast cancerOverall survivalPI3K inhibitorsPI3K pathwayPartial responseComplete responseClinical benefitSingle-arm phase 2 studyTriple-negative metastatic breast cancerMedian progression-free survivalK inhibitorsClinical benefit rateEfficacy of buparlisibK pathwayFrequent adverse eventsMedian overall survivalPercent of patientsMetastatic breast cancerSubset of patients
2019
A combinatorial biomarker predicts pathologic complete response to neoadjuvant lapatinib and trastuzumab without chemotherapy in patients with HER2+ breast cancer
Veeraraghavan J, De Angelis C, Mao R, Wang T, Herrera S, Pavlick AC, Contreras A, Nuciforo P, Mayer IA, Forero A, Nanda R, Goetz MP, Chang JC, Wolff AC, Krop IE, Fuqua SAW, Prat A, Hilsenbeck SG, Weigelt B, Reis-Filho JS, Gutierrez C, Osborne CK, Rimawi MF, Schiff R. A combinatorial biomarker predicts pathologic complete response to neoadjuvant lapatinib and trastuzumab without chemotherapy in patients with HER2+ breast cancer. Annals Of Oncology 2019, 30: 927-933. PMID: 30903140, PMCID: PMC6594453, DOI: 10.1093/annonc/mdz076.Peer-Reviewed Original ResearchMeSH KeywordsAntineoplastic Combined Chemotherapy ProtocolsBiomarkers, TumorBreast NeoplasmsClass I Phosphatidylinositol 3-KinasesFemaleFollow-Up StudiesGene AmplificationHumansIn Situ Hybridization, FluorescenceLapatinibNeoadjuvant TherapyPhosphatidylinositol 3-KinasesPrognosisReceptor, ErbB-2Remission InductionTrastuzumabConceptsPathologic complete responsePI3K pathway statusBreast cancerHER2 ratioPI3K pathwayNeoadjuvant lapatinibComplete responseHER2 amplificationPathway statusHER2-positive breast cancerPI3K pathway alterationsHER2 amplification levelHER2 FISH ratioK pathwayAnti-HER2 therapyWild-type PIK3CAPI3K pathway activationPIK3CA mutationsClinical subtypesHER2 overexpressionFISH ratioPatientsChemotherapyHER2High PTEN
2017
Low PTEN levels and PIK3CA mutations predict resistance to neoadjuvant lapatinib and trastuzumab without chemotherapy in patients with HER2 over-expressing breast cancer
Rimawi MF, De Angelis C, Contreras A, Pareja F, Geyer FC, Burke KA, Herrera S, Wang T, Mayer IA, Forero A, Nanda R, Goetz MP, Chang JC, Krop IE, Wolff AC, Pavlick AC, Fuqua SAW, Gutierrez C, Hilsenbeck SG, Li MM, Weigelt B, Reis-Filho JS, Kent Osborne C, Schiff R. Low PTEN levels and PIK3CA mutations predict resistance to neoadjuvant lapatinib and trastuzumab without chemotherapy in patients with HER2 over-expressing breast cancer. Breast Cancer Research And Treatment 2017, 167: 731-740. PMID: 29110152, PMCID: PMC5821069, DOI: 10.1007/s10549-017-4533-9.Peer-Reviewed Original ResearchMeSH KeywordsAdultAgedAntibodies, Monoclonal, HumanizedAntineoplastic Combined Chemotherapy ProtocolsBreast NeoplasmsClass I Phosphatidylinositol 3-KinasesFemaleGene Expression Regulation, NeoplasticHumansLapatinibMiddle AgedMutationNeoadjuvant TherapyPTEN PhosphohydrolaseQuinazolinesReceptor, ErbB-2TrastuzumabConceptsPathologic complete responsePIK3CA mutationsBreast cancerPTEN expression levelsPTEN statusClinical trialsHER2-positive breast cancerNeoadjuvant clinical trialsPIK3CA mutation analysisLow PTEN expression levelsExpression levelsPI3K pathwayEvaluable patientsNeoadjuvant lapatinibComplete responsePatientsChemotherapyPTEN immunohistochemistryTumor samplesTrastuzumabCancerPathway activationK pathwayFurther studiesPTEN levels
2012
A phase I/IB dose-escalation study of BEZ235 in combination with trastuzumab in patients with PI3-kinase or PTEN altered HER2+ metastatic breast cancer.
Krop I, Saura C, Rodon Ahnert J, Becerra C, Britten C, Isakoff S, Demanse D, Hackl W, Quadt C, Silva A, Burris H, Abu-Khalaf M, Baselga J. A phase I/IB dose-escalation study of BEZ235 in combination with trastuzumab in patients with PI3-kinase or PTEN altered HER2+ metastatic breast cancer. Journal Of Clinical Oncology 2012, 30: 508-508. DOI: 10.1200/jco.2012.30.15_suppl.508.Peer-Reviewed Original ResearchMetastatic breast cancerPI3K pathway alterationsBreast cancerG3 nauseaResistant HER2Disease stabilizationPathway alterationsPI3K/AKT/mTOR pathwayAcceptable safety profileDose-escalation studyAdvanced solid tumorsAKT/mTOR pathwayBreast cancer modelLogistic regression modelsPI3K pathwayG3 fatigueObserved DLTsBrain metastasesPartial responseSkin rashAdverse eventsLiver metastasesDose escalationSafety profileDose levels
2011
P1-17-02: A Phase 1/2 Study of SAR245408 (S08) in Combination with Trastuzumab (T) or Paclitaxel (P) and T in Patients with HER2+ Metastatic Breast Cancer (MBC) Who Progressed on a Previous T-Based Regimen.
Tolaney S, Burris H, Gartner E, Mayer I, Saura C, Maurer M, DeCillis A, Ruiz-Soto R, Lager J, Winer E, Krop I. P1-17-02: A Phase 1/2 Study of SAR245408 (S08) in Combination with Trastuzumab (T) or Paclitaxel (P) and T in Patients with HER2+ Metastatic Breast Cancer (MBC) Who Progressed on a Previous T-Based Regimen. Cancer Research 2011, 71: p1-17-02-p1-17-02. DOI: 10.1158/0008-5472.sabcs11-p1-17-02.Peer-Reviewed Original ResearchPhase 1/2 studyMetastatic breast cancerOverall response rateArm 1Arm 2Epigastric painMulticenter phase 1/2 studyPan-PI3K inhibitorECOG PS 0Preliminary PK dataDose-escalation designAge 55 yrPhase 2 portionDifferent dose levelsPhase 1PI3K pathwayDisease refractoryFemale ptsMost HER2Recurrent HER2MBC patientsMetastatic diseaseAdverse eventsPeripheral neuropathyPS 0PD09-04: A Phase Ib, Open-Label, Dose-Escalation Study of the Safety and Pharmacology of the PI3-Kinase Inhibitor GDC-0941 in Combination with Paclitaxel and Bevacizumab in Patients with Locally Recurrent or Metastatic Breast Cancer.
Schöffski P, De Benedictis E, Gendreau S, Gianni L, Krop I, Levy G, Ware J, Wildiers H, Winer E. PD09-04: A Phase Ib, Open-Label, Dose-Escalation Study of the Safety and Pharmacology of the PI3-Kinase Inhibitor GDC-0941 in Combination with Paclitaxel and Bevacizumab in Patients with Locally Recurrent or Metastatic Breast Cancer. Cancer Research 2011, 71: pd09-04-pd09-04. DOI: 10.1158/0008-5472.sabcs11-pd09-04.Peer-Reviewed Original ResearchMetastatic BCDay 1Prior treatmentPhase Ib studyDose-escalation studySubclavian vein thrombosisMetastatic breast cancerSingle-agent activityDose-escalation designCycle 1Breast cancer cell linesClass I PI3K isoformsAnti-cancer therapyPI3K pathwayPhosphorylation of AktAdditional DLTsCancer cell linesDrug holidayOpen labelVein thrombosisEscalation designPI3K isoformsLocally RecurrentChemotherapy treatmentCohort 2