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A Modular Phase I/II Open-label Dose Escalation and Dose Expansion Study to Evaluate the Safety, Pharmacokinetics, Pharmacodynamics, and Efficacy of AZD9793, a T Cell-engaging Antibody Targeting Glypican-3 (GPC3) in Adult Participants With Advanced or Metastatic Solid Tumours (RHEA-1)

First in Human Study to Evaluate AZD9793 in Participants With Advanced or Metastatic Solid Tumours - RHEA-1

Status
Recruiting
Phases
Phase 2
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT2031250484
Enrollment
10
Registered
2025-11-05
Start date
2025-11-07
Completion date
Unknown
Last updated
2025-11-17

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

Conditions

hepatocellular carcinoma

Interventions

Sponsors

Hibi Kazushige
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: -Age 18 or more at the time of signing the informed consent. -GPC3 positive tumour as determined by a central laboratory using an analytically validated IHC assay. -Must have at least one measurable lesion according to Response Evaluation Criteria in Solid Tumors (RECIST) v1.1 -Eastern Cooperative Oncology Group Performance status (ECOG PS): 0-1 at screening. -Adequate organ and bone marrow function measured within 28 days prior to first dose as defined by the protocol. -Contraceptive use by men or women should be consistent with local regulations, as defined by the protocol. -Confirmed advanced recurrent and/or metastatic and/or unresectable HCC, which is histopathologically proven based on the criteria established by the World Health Organization. -Barcelona Clinic Liver Cancer (BCLC) stage B (that is not eligible for locoregional therapy) or stage C. -Child-Pugh Score class A. -Previous therapy: Part A: Patients who have received at least one prior line of standard systemic therapy for HCC as per NCCN or other local scientific guidelines and for which a clinical study is the best option for next treatment based on prior response and/or tolerability and/or patient/investigator decision. Part B: Patients must not have received more than 1 prior line of systemic therapy in the advanced recurrent and/or metastatic setting.

Exclusion criteria

Exclusion criteria: -Unresolved toxicity from prior anticancer therapy, including irAEs, of Common Terminology Criteria for Adverse Events (CTCAE) Grade 2 or more except for vitiligo, peripheral neuropathy related to prior anti-cancer therapy, alopecia, endocrine disorders that are controlled with replacement hormone therapy and asymptomatic laboratory abnormalities. -Prior to enrolment, participation in another clinical study with an investigational product administered in the last 21 days or 5 half-lives whichever is shorter. -CAR-T cell therapy within the last 6 months prior to enrolment on this study. -Known allergy or hypersensitivity to AZD9793 or any of the excipients of the product as outlined in the IB. -Requires chronic immunosuppressive therapy (including steroids > 10 mg prednisone/day or equivalent). -Prior treatment with any therapy that is targeted to GPC3. -Received any therapy to treat cancer (including chemotherapy, biologics, cellular therapies) within 5 half-lives of an anticancer drug prior to the first dose of study treatment. -Received radiation within 14 days; palliative radiation to reduce the risk of tumour lysis syndrome (TLS) or CRS/neurotoxicity in participants with bulky disease is permitted. -Undergone a major surgical procedure within 14 days to allow adequate healing. -Experienced unacceptable cytokine release syndrome (CRS) or Immune Effector Cell Associated Neurotoxicity (ICANS) following prior T cell engagers (TCE) or chimeric antigen receptor T (CAR-T) cell therapy. -Previous history of hemophagocytic lymphohistiocytosis (HLH) / macrophage activation syndrome (MAS). -Active or prior documented autoimmune or inflammatory disorders within 3 years of start of treatment. - Cardiac conditions as defined by the protocol. -History of thromboembolic event within the past 3 months prior to the scheduled first

Design outcomes

Primary

MeasureTime frame
-The number of patients with adverse events [Time Frame: From first dose of study drug up to 30 days post last dose and prior to start of subsequent anticancer therapy] : Number of patients with adverse events by system organ class and preferred term -The number of patients with serious adverse events [Time Frame: From first dose of study drug up to 30 days post last dose and prior to start of subsequent anticancer therapy] : Number of patients with serious adverse events by system organ class and preferred term -The number of patients with adverse events of special interest [Time Frame: From first dose of study drug up to 30 days post last dose and prior to start of subsequent anticancer therapy] : Number of patients with adverse events of special interest by system organ class and preferred term -The number of patients with dose-limiting toxicity (DLT), as defined in the protocol. [Time Frame: From date of first dose of study drug until the end of Cycle 1 (up to 28 days)] : Number of patients with at least 1 DLT. A DLT is a toxicity as defined in the protocol that occurs from the first dose of study drug up to and including the planned end of Cycle 1 (the DLT assessment period) that is assessed as unrelated to the disease or disease-related processes under investigation. -Objective Response Rate (ORR) [Dose expansion only / Time Frame: From first dose of study drug to progressive disease or the last evaluable assessment in the absence of disease progression whichever comes first (up to approximately 2 years)] : The percentage of patients with a confirmed investigator assessed complete or partial response according to response criteria in solid tumours (RECIST 1.1). Dose expansion only.

Countries

China, Hong Kong, Japan, South Korea, Spain, Taiwan, United States

Contacts

Public ContactKazushige Hibi

Astrazeneka K.K

RD-clinical-information-Japan@astrazeneca.com+81-6-4802-3600

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Feb 4, 2026