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A Phase Ib/II, Multicenter Study of the Combination of LEE011 and BYL719 With Letrozole in Adult Patients With Advanced ER+ Breast Cancer

Status
Active, not recruiting
Phases
Phase 1Phase 2
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2023-509511-84-00
Acronym
CLEE011X2107
Enrollment
83
Registered
2024-04-30
Start date
2014-03-19
Completion date
Unknown
Last updated
2025-12-02

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Advanced HR+ breast cancer

Brief summary

Incidence of Dose Limiting Toxicities (DLTs) in Cycle 1 - Phase lb only [Time Frame: 28 days], Adverse Events (AEs), serious AEs (SAEs), changes in hematology and chemistry values, vital signs, electrocardiograms (ECGs), dose interruptions, reductions and dose intensity., Plasma concentration-time profiles of LEE011, letrozole. PK parameters, including but not limited to AUC0-24h, Cmin, Cmax, Tmax, accumulation ratio (Racc).

Detailed description

Plasma concentration-time profiles of LEE011, BYL719 and letrozole. PK parameters, including but not limited to AUC0-24h, Cmin, Cmax, Tmax, accumulation ratio (Racc)., Tumor response per RECIST v1.1 (by local investigator assessment): Overall Response Rate (ORR), Disease Control Rate (DCR), Clinical benefit Rate (CBR), Duration of Response (DOR) and Progression Free Survival (PFS) CBR is defined as CR, PR, or SD lasting 24 weeks or longer., Incidence of grade 3 or 4 hyperglycemia, Incidence of grade 3 or 4 AST/ALT elevations

Interventions

DRUGALPELISIB
DRUGLEE011
DRUGRIBOCICLIB
DRUGLETROZOLE

Sponsors

Novartis Pharma AG
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
Incidence of Dose Limiting Toxicities (DLTs) in Cycle 1 - Phase lb only [Time Frame: 28 days], Adverse Events (AEs), serious AEs (SAEs), changes in hematology and chemistry values, vital signs, electrocardiograms (ECGs), dose interruptions, reductions and dose intensity., Plasma concentration-time profiles of LEE011, letrozole. PK parameters, including but not limited to AUC0-24h, Cmin, Cmax, Tmax, accumulation ratio (Racc).

Secondary

MeasureTime frame
Plasma concentration-time profiles of LEE011, BYL719 and letrozole. PK parameters, including but not limited to AUC0-24h, Cmin, Cmax, Tmax, accumulation ratio (Racc)., Tumor response per RECIST v1.1 (by local investigator assessment): Overall Response Rate (ORR), Disease Control Rate (DCR), Clinical benefit Rate (CBR), Duration of Response (DOR) and Progression Free Survival (PFS) CBR is defined as CR, PR, or SD lasting 24 weeks or longer., Incidence of grade 3 or 4 hyperglycemia, Incidence of grade 3 or 4 AST/ALT elevations

Countries

France, Spain

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026