A Clinical Trial of the Safety and Anti-Tumor Activity of AB-201 in Subjects With Advanced HER2+ Solid Tumors

NCT ID: NCT05678205

Last Updated: 2025-07-30

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

WITHDRAWN

Clinical Phase

PHASE1/PHASE2

Study Classification

INTERVENTIONAL

Study Start Date

2023-08-01

Study Completion Date

2027-04-30

Brief Summary

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This clinical trial will enroll subjects with HER2+ solid tumors and is conducted in two phases. The primary objective of Phase 1 is to determine the safety and tolerability of AB-201 in subjects with advanced HER2+ solid tumors. The primary objective of Phase 2 is to evaluate the efficacy of AB-201.

Subjects will receive up to 3 doses of AB-201, followed by scheduled assessments of overall health and tumor response.

Detailed Description

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Conditions

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Breast Cancer Gastric Cancer Gastroesophageal Junction Adenocarcinoma

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

SEQUENTIAL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Phase 1 Dose Confirmation

Dose Confirmation of AB-201 in advanced metastatic breast cancer, gastric or gastroesophageal junction adenocarcinoma with HER2 overexpression

Group Type EXPERIMENTAL

AB-201

Intervention Type DRUG

NK Cell Therapy

Cyclophosphamide

Intervention Type DRUG

Lymphodepleting chemotherapy

Fludarabine

Intervention Type DRUG

Lymphodepleting chemotherapy

Phase 2 Cohort A

AB-201 given to patients with advanced/unresectable or metastatic breast cancer with HER2 overexpression (IHC ≥2+) that is refractory to or intolerant of standard treatment, or for which no standard treatment is available

Group Type EXPERIMENTAL

AB-201

Intervention Type DRUG

NK Cell Therapy

Cyclophosphamide

Intervention Type DRUG

Lymphodepleting chemotherapy

Fludarabine

Intervention Type DRUG

Lymphodepleting chemotherapy

Phase 2 Cohort B

AB-201 given to patients with advanced/unresectable or metastatic breast cancer with HER2 overexpression (IHC 3+ or IHC 2+/ISH+) that is relapsed to, refractory to, or intolerant of previous trastuzumab deruxtecan (T-DXd) based therapy

Group Type EXPERIMENTAL

AB-201

Intervention Type DRUG

NK Cell Therapy

Cyclophosphamide

Intervention Type DRUG

Lymphodepleting chemotherapy

Fludarabine

Intervention Type DRUG

Lymphodepleting chemotherapy

Phase 2 Cohort C

AB-201 given to patients with advanced/unresectable or metastatic gastric or gastroesophageal junction adenocarcinoma with HER2 overexpression (IHC ≥ 2+) that is refractory to or intolerant of standard treatment, or for which no standard treatment is available

Group Type EXPERIMENTAL

AB-201

Intervention Type DRUG

NK Cell Therapy

Cyclophosphamide

Intervention Type DRUG

Lymphodepleting chemotherapy

Fludarabine

Intervention Type DRUG

Lymphodepleting chemotherapy

Interventions

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AB-201

NK Cell Therapy

Intervention Type DRUG

Cyclophosphamide

Lymphodepleting chemotherapy

Intervention Type DRUG

Fludarabine

Lymphodepleting chemotherapy

Intervention Type DRUG

Eligibility Criteria

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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 ≥ 2 prior systemic therapies; subjects with gastric/GEJ cancer must have received ≥ 1 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.
* Pregnant or lactating females and subjects of both sexes who are not willing to practice birth control from the time of consent through 6 months after administration of the last AB-201 dose.
* Severe disease progression or health deterioration within 2 weeks prior to lymphodepletion regimen.
Minimum Eligible Age

18 Years

Maximum Eligible Age

99 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Artiva Biotherapeutics, Inc.

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Thorsten Graef, MD, Ph.D

Role: STUDY_DIRECTOR

Artiva Biotherapeutics

Locations

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Oregon Health Science University (OHSU)

Portland, Oregon, United States

Site Status

The Catholic University of Korea, St. Vincent's Hospital

Suwon, Gyeonggi-do, South Korea

Site Status

Countries

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United States South Korea

Other Identifiers

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AB-201-01

Identifier Type: -

Identifier Source: org_study_id

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