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A Randomized, Multicenter, Placebo-controlled, Phase 3 study to Evaluate the Efficacy and Safety of HER2/neu Peptide GLSI-100 (GP2 + GM-CSF) in HER2/neu Positive Subjects with Residual Disease or High-Risk PCR after both Neoadjuvant and Postoperative Adjuvant Trastuzumab-based Therapy (FLAMINGO-01)

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2023-504323-25-01
Acronym
GLSI-21-01
Enrollment
306
Registered
2024-02-19
Start date
2024-03-19
Completion date
Unknown
Last updated
2025-10-31

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

Conditions

breast cancer

Brief summary

IBCFS is defined as the time from randomization (or first dose of study medication if in the non-randomized arm) until the date of ipsilateral invasive breast cancer recurrence, ipsilateral local-regional invasive breast cancer recurrence, distant recurrence, contralateral invasive breast cancer, or any cause mortality.

Detailed description

IDFS is defined as the time from randomization (or first dose of study medication if in the non-randomized arm) until the date of ipsilateral invasive breast cancer recurrence, ipsilateral local-regional invasive breast cancer recurrence, distant recurrence, contralateral invasive breast cancer, second primary non-breast invasive cancer, or any cause mortality., The overall survival (OS) in the study population as defined as the time from randomization (or first dose of study medication if in the non-randomized arm) until death from any cause., Quality of life as assessed by QLQ-C30 and FACT-GP5., The frequency of adverse events (AEs) and serious adverse events (SAEs) characterized by type, severity (as defined by the NIH CTCAE, version 5.0), seriousness, duration, and relationship to study treatment., Exploratory Endpoints: • Immune response will be measured by Delayed-Type Hypersensitivity (DTH) tests and immunologic assays. • Safety, efficacy, and immune response as defined above in non-HLA-A*02 breast cancer subjects

Interventions

Sponsors

Greenwich LifeSciences Inc.
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
IBCFS is defined as the time from randomization (or first dose of study medication if in the non-randomized arm) until the date of ipsilateral invasive breast cancer recurrence, ipsilateral local-regional invasive breast cancer recurrence, distant recurrence, contralateral invasive breast cancer, or any cause mortality.

Secondary

MeasureTime frame
IDFS is defined as the time from randomization (or first dose of study medication if in the non-randomized arm) until the date of ipsilateral invasive breast cancer recurrence, ipsilateral local-regional invasive breast cancer recurrence, distant recurrence, contralateral invasive breast cancer, second primary non-breast invasive cancer, or any cause mortality., The overall survival (OS) in the study population as defined as the time from randomization (or first dose of study medication if in the non-randomized arm) until death from any cause., Quality of life as assessed by QLQ-C30 and FACT-GP5., The frequency of adverse events (AEs) and serious adverse events (SAEs) characterized by type, severity (as defined by the NIH CTCAE, version 5.0), seriousness, duration, and relationship to study treatment., Exploratory Endpoints: • Immune response will be measured by Delayed-Type Hypersensitivity (DTH) tests and immunologic assays. • Safety, efficacy, and immune response as defined above in

Countries

Austria, Belgium, France, Germany, Ireland, Italy, Poland, Portugal, Romania, Spain

Outcome results

None listed

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