Phase 1 Clinical Trial to Evaluate the Safety and Anti-Tumor Activity of AB-201
- Conditions
- Breast CancerGastroesophageal Junction AdenocarcinomaGastric Cancer
- Interventions
- Registration Number
- NCT06341647
- Lead Sponsor
- GC Cell Corporation
- Brief Summary
This clinical trial will enroll subjects with HER2+ solid tumors and is conducted in two phases, which are phase 1a and phase 1b. The primary objective of phase 1 is to determine the safety and tolerability of AB-201 in subjects with advanced HER2+ solid tumors.
- Detailed Description
This is a Phase 1, multicenter study designed to evaluate the safety, tolerability, and efficacy of AB-201 in subjects with advanced HER2+ solid tumors (specifically, breast and gastric/GEJ cancers).
The Phase 1 will be conducted in two parts, an initial dose escalation stage followed by a dose expansion stage.
Study participation for each subject begins with up to 28 days (1 month) of screening following written informed consent, then lymphodepletion treatment, followed by AB-201. Up to 3 doses of AB-201 may be administered. All subjects will be monitored for a total duration of 18 months of follow up from the first dose administration of AB-201.
Recruitment & Eligibility
- Status
- WITHDRAWN
- Sex
- All
- Target Recruitment
- 48
- ECOG performance status 0 to 1.
- Histologically confirmed HER2 expressed breast or gastric/GEJ cancer IHC ≥ 2+ within 6 months prior to study entry.
- Confirmed diagnosis of an advanced/unresectable or metastatic HER2+ breast or gastric/GEJ cancer that is refractory to, or intolerable of standard treatment, or for which no standard treatment is available.
- Must have received prior cancer therapy: Subjects with breast cancer must have received ≥ 3 prior systemic therapies; subjects with gastric/GEJ cancer must have received ≥ 2 prior systemic therapy(ies); subjects with IHC 3+ or IHC 2+/ISH+ cancers must have received previous treatment with a HER2-targeting therapy.
- Known past or current malignancy other than inclusion diagnosis.
- Known clinically significant cardiac disease.
- Active central nervous system (CNS) metastases, or involvement of the CNS, unless there is a history of at least 3 months of sustained remission.
- Unresolved toxicities from prior anticancer therapy.
- Ongoing uncontrolled systemic infections requiring antibiotic, anti-fungal, or anti-viral therapy.
- History of sensitivity or intolerance to cyclophosphamide or fludarabine.
- Currently Pregnant or lactating
- Severe disease progression or health deterioration within 2 weeks prior to lymphodepletion regimen.
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- SEQUENTIAL
- Arm && Interventions
Group Intervention Description Phase 1b Dose Expansion Cyclophosphamide * Dose Confirmation of AB-201 in advanced metastatic breast cancer, gastric or gastroesophageal junction adenocarcinoma with HER2 overexpression * Interventions: * Drug: AB-201 * Drug: Cyclophosphamide * Drug: Fludarabine Phase 1a Dose Escalation Fludarabine * Dose Escalation of AB-201 in advanced metastatic breast cancer, gastric or gastroesophageal junction adenocarcinoma with HER2 overexpression * Interventions: * Drug: AB-201 * Drug: Cyclophosphamide * Drug: Fludarabine Phase 1a Dose Escalation Cyclophosphamide * Dose Escalation of AB-201 in advanced metastatic breast cancer, gastric or gastroesophageal junction adenocarcinoma with HER2 overexpression * Interventions: * Drug: AB-201 * Drug: Cyclophosphamide * Drug: Fludarabine Phase 1b Dose Expansion AB-201 * Dose Confirmation of AB-201 in advanced metastatic breast cancer, gastric or gastroesophageal junction adenocarcinoma with HER2 overexpression * Interventions: * Drug: AB-201 * Drug: Cyclophosphamide * Drug: Fludarabine Phase 1b Dose Expansion Fludarabine * Dose Confirmation of AB-201 in advanced metastatic breast cancer, gastric or gastroesophageal junction adenocarcinoma with HER2 overexpression * Interventions: * Drug: AB-201 * Drug: Cyclophosphamide * Drug: Fludarabine Phase 1a Dose Escalation AB-201 * Dose Escalation of AB-201 in advanced metastatic breast cancer, gastric or gastroesophageal junction adenocarcinoma with HER2 overexpression * Interventions: * Drug: AB-201 * Drug: Cyclophosphamide * Drug: Fludarabine
- Primary Outcome Measures
Name Time Method Determination of Recommended Phase 2 Dose (RP2D) up to 18 months per patient Assessment of Dose-Limiting Toxicities(DLTs), pharmacokinetics (PK), safety, and objective response rate (ORR) per the Response Evaluation Criteria for Solid Tumors (RECIST) v1.1 in subjects with HER2+ breast cancer and gastric/GEJ cancer.
PK: Monitor persistence of AB-201 in subjects samples collected prior to and following AB-201 administration.Incidence, severity, seriousness, and dose relationship of Adverse Events [Safety & Tolerability] up to 18 months per patient Adverse events and laboratory abnormalities will be graded according to the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE) version 5.0.
- Secondary Outcome Measures
Name Time Method To determine the preliminary efficacy, by the objective response rate (ORR) per the Response Evaluation Criteria for Solid Tumors (RECIST) v1.1, of AB-201 in subjects with advanced HER2+ solid tumors up to 18 months per patient The proportion of subjects who experienced an PR or CR, as assessed by investigators per RECIST v1.1.
Trial Locations
- Locations (3)
The Alfred Hosptial
🇦🇺Melbourne, Victoria, Australia
Austin Hosptial
🇦🇺Melbourne, Victoria, Australia
Peter MacCallum Cancer Centre
🇦🇺Melbourne, Victoria, Australia