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A randomized phase III trial of trastuzumab + ALpelisib +/- fulvestrant versus trastuzumab + chemotherapy in patients with PIK3CA mutated previously treated HER2+ Advanced BrEasT cancer. “ALPHABET Study”

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2024-514611-98-00
Enrollment
27
Registered
2024-10-24
Start date
2021-07-20
Completion date
2025-12-23
Last updated
2025-09-09

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

Conditions

PIK3CA mutated HER2+ advanced or relapsed breast cancer (BC) previously treated with trastuzumab

Brief summary

PFS: Time from randomization to objective disease progression based on the investigator's assessment according to the response evaluation criteria for solid tumors (RECIST) version 1.1., or death from any cause.

Detailed description

OS: time from randomization to death from any cause., OR: complete or partial response as best overall response based on the investigator’s assessment according to RECIST version 1.1., Safety and tolerability: adverse events (AEs) grades will be defined by the National Cancer Institute common terminology criteria for adverse events (NCI-CTCAE) version 5.0. AE terms will be coded according to the MedDRA dictionary.

Interventions

DRUGALPELISIB

Sponsors

Fundacion Grupo Espanol De Investigacion En Cancer De Mama
Lead SponsorOTHER

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
PFS: Time from randomization to objective disease progression based on the investigator's assessment according to the response evaluation criteria for solid tumors (RECIST) version 1.1., or death from any cause.

Secondary

MeasureTime frame
OS: time from randomization to death from any cause., OR: complete or partial response as best overall response based on the investigator’s assessment according to RECIST version 1.1., Safety and tolerability: adverse events (AEs) grades will be defined by the National Cancer Institute common terminology criteria for adverse events (NCI-CTCAE) version 5.0. AE terms will be coded according to the MedDRA dictionary.

Countries

Spain

Outcome results

None listed

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