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Neoadjuvant Study Chemotherapy vs Letrozole + Abemaciclib in HR+/HER2- High/Intermediate Risk Breast Cancer Patients

NCT04293393 · Status: ACTIVE_NOT_RECRUITING · Phase: PHASE2 · Type: INTERVENTIONAL · Enrollment: 200

Last updated 2026-03-12

Study results available
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Summary

Phase II, randomized, open-label, international, multicenter study to compare efficacy of standard chemotherapy vs. letrozole plus abemaciclib as neoadjuvant therapy in HR-positive/HER2-negative high/intermediate risk breast cancer patients

Conditions

  • Early Breast Cancer

Interventions

DRUG

Doxorubicin

Doxorubicin 60mg/m2 and cyclophosphamide 600mg/m2 (AC) every 21 days for 4 cycles followed by weekly paclitaxel 80mg/m2 for 12 weeks or 3-weekly docetaxel 100mg/m2 for 4 cycles.

DRUG

Cyclophosphamide

Doxorubicin 60mg/m2 and cyclophosphamide 600mg/m2 (AC) every 21 days for 4 cycles followed by weekly paclitaxel 80mg/m2 for 12 weeks or 3-weekly docetaxel 100mg/m2 for 4 cycles.

DRUG

Taxane

Doxorubicin 60mg/m2 and cyclophosphamide 600mg/m2 (AC) every 21 days for 4 cycles followed by weekly paclitaxel 80mg/m2 for 12 weeks or 3-weekly docetaxel 100mg/m2 for 4 cycles.

DRUG

Letrozole

Letrozole 2.5mg orally daily + abemaciclib 150mg orally every 12 hours on a continuous dosing schedule, +/- LHRH analogs in premenopausal women, up to 12 months, in 28-day cycles

DRUG

Abemaciclib

Letrozole 2.5mg orally daily + abemaciclib 150mg orally every 12 hours on a continuous dosing schedule, +/- LHRH analogs in premenopausal women, up to 12 months, in 28-day cycles

DRUG

LHRH Analogue

Letrozole 2.5mg orally daily + abemaciclib 150mg orally every 12 hours on a continuous dosing schedule, +/- LHRH analogs in premenopausal women, up to 12 months, in 28-day cycles

Sponsors & Collaborators

Principal Investigators

  • Study Director · Hospital General Universitario Gregorio Marañon

  • Study Director · Hospital Universitario Virgen de la Victoria

  • Study Director · Instituto Valenciano de Oncología

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Model
PARALLEL

Eligibility

Min Age
18 Years
Sex
FEMALE
Healthy Volunteers
No

Timeline & Regulatory

Start
2020-10-02
Primary Completion
2023-06-21
Completion
2033-02-28

Countries

  • Spain

Study Locations

More Related Trials

Entities

Drugs
Companies

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT04293393 on ClinicalTrials.gov