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Photon Radiotherapy Plus Tremelimumab/Durvalumab for BCLC Stage B and C HCC

NCT06999707 · Status: RECRUITING · Phase: PHASE2 · Type: INTERVENTIONAL · Enrollment: 45

Last updated 2025-06-05

No results posted yet for this study

Summary

Tremelimumab plus durvalumab (the STRIDE regimen) is an approved first-line therapy for unresectable hepatocellular carcinoma (HCC); however, it demonstrates limited efficacy, with an objective response rate (ORR) of only 20.1%. Radiation therapy (RT) is highly effective in controlling localized solid tumors and has become an integral component of the treatment algorithm for unresectable HCC. Preclinical studies have shown that combining RT with PD-L1/PD-1 blockade promotes immunogenic cell death and enhances antigen presentation by dendritic cells, thereby boosting systemic T cell-mediated antitumor responses in mouse models. The addition of CTLA-4 inhibition further enhances antigen cross-priming following RT. Recent retrospective data also indicate that combining RT with immune-oncology agents is associated with improved overall survival and prolonged time to progression compared to RT or immunotherapy alone. However, the clinical benefit and immunologic impact of combining RT with tremelimumab and durvalumab have not yet been evaluated in prospective clinical trials for unresectable HCC.

This phase II, single-arm clinical trial aims to assess the safety, efficacy, and immunologic effects of combining proton RT with tremelimumab and durvalumab in patients with unresectable HCC.

Conditions

  • HCC - Hepatocellular Carcinoma
  • Tremelimumab
  • Durvalumab
  • Radiotherapy

Interventions

RADIATION

Photon radiotherapy

* 39.6-72.6 Gy in 22 fractions for tumors ≤1 cm from hepatic hilum, bowel, and heart. * 30-66 Gy in 10 fractions for tumors \>1 cm from hepatic hilum, bowel, and heart. * 27.5-50 Gy in 5 fractions using stereotactic body radiation therapy (SBRT) techniques

DRUG

Tremelimumab

Tremelimumab 300 mg will be administered as an IV infusion for one dose

DRUG

Durvalumab

Treatment Duration Guidelines: \* Complete Response (CR): Patients who achieve a CR within one year of treatment will continue durvalumab for a total duration of two years. \* Partial Response (PR): Patients who achieve a PR should continue durvalumab until achieving CR, disease progression (PD), or for a total duration of two years. \* Stable Disease (SD): Patients with SD will receive duvalumab for a total of 6 doses.

Sponsors & Collaborators

  • Chang Gung Memorial Hospital

    lead OTHER

Study Design

Allocation
NA
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2025-05-22
Primary Completion
2030-05-31
Completion
2033-05-31

Countries

  • Taiwan

Study Locations

More Related Trials

Entities

Drugs

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT06999707 on ClinicalTrials.gov