NCT07245797

A Phase II, Multicenter, Open-label Study to Evaluate the Efficacy and Safety of Neoadjuvant Therapy With Inavolisib Plus Pertuzumab and Trastuzumab as Subcutaneous (PH-FDC SC) and 3-week Cycle Nab-paclitaxel for PIK3CA-mutated, HER2+, eBC

the Efficacy and Safety of Neoadjuvant Therapy With Inavolisib Plus Pertuzumab and Trastuzumab as Subcutaneous (PH-FDC SC) and 3-week Cycle Nab-paclitaxel for PIK3CA-mutated, HER2+, eBC

• Status: Not Yet Recruiting
• Phase: Phase 2
• Study type: Interventional
• Enrollment: 164 (estimated)
• Sponsor: Zhimin Shao · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

The study consists of a screening period of 28 days, a treatment period. Local or central testing of PIK3CA mutation in blood or tumor tissue must be performed using an approved polymerase chain reaction (PCR)-based or next generation sequencing (NGS) assay at a clinical laboratory. Patients with confirmed eligibility criteria and PIK3CA mutant breast cancer will be randomized in a 1:1 ratio to receive: Neoadjuvant treatment with dual anti-HER2 blockade consisting of ready-to-use fixed-dose combination of pertuzumab and trastuzumab as subcutaneous (PH-FDC SC) formulation q3w and nab-paclitaxel (125 mg/m2 on days 1, 8, and 15) in 3-week cycle for total 6 cycles * with inavolisib (6 cycles) or * without inavolisib. In both study arms, treatment will be given until surgery/core-biopsy, disease progression, unacceptable toxicity, or withdrawal of consent of the patient. All patients will undergo surgery or biopsy after completing study therapy to assess pCR rate.

Conditions

• Breast Cancer

Interventions

Type	Name	Description
DRUG	fixed-dose combination of pertuzumab and trastuzumab as subcutaneousformulation q3w and nab-paclitaxel in 3-week cycle for total 6 cycles with inavolisib (6 cycles) or without inavolisib.	fixed-dose combination of pertuzumab and trastuzumab as subcutaneousformulation q3w and nab-paclitaxel in 3-week cycle for total 6 cycles with inavolisib (6 cycles) or without inavolisib.

Timeline

• Start date: 2025-12-15
• Primary completion: 2026-12-15
• Completion: 2027-02-23
• First posted: 2025-11-24
• Last updated: 2025-11-24