Clinical trial NCT06341647: Phase 1 Clinical Trial to Evaluate the Safety and Anti-Tumor Activity of AB-201
Official title: A Multicenter, Open-label, Phase 1 Clinical Trial to Evaluate the Safety and Anti-Tumor Activity of AB-201 in Subjects With Advanced Human Epidermal Growth Factor Receptor 2 Positive(HER2+) Solid Tumors
Study type: INTERVENTIONAL
Overall status: WITHDRAWN
Phase: PHASE1
Conditions: Breast Cancer
Gastric Cancer
Gastroesophageal Junction Adenocarcinoma
Lead sponsor: GC Cell Corporation
Sponsor class: INDUSTRY
First posted: 2024-04-02
Enrollment: 0
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NON_RANDOMIZED
Intervention model: SEQUENTIAL
Intervention model description: * Safety: incidence and severity of AE and SAE \[Time Frame: From the time of consent through End of Study (up to 18 months per patient)\]
* Determination of Recommended Phase 2 Dose (RP2D)
Primary purpose: TREATMENT

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.

Eligibility criteria: Inclusion Criteria:

* 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.

Exclusion Criteria:

* 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.

Primary outcomes:
measure: Incidence, severity, seriousness, and dose relationship of Adverse Events [Safety & Tolerability]
timeFrame: up to 18 months per patient
measure: Determination of Recommended Phase 2 Dose (RP2D)
timeFrame: up to 18 months per patient
Secondary outcomes:
measure: 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
timeFrame: up to 18 months per patient
Other outcomes:
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