Evaluation of SIRT Followed by Immunotherapy for Treatment of Hepatocellular Carcinoma With Portal Vein Thrombosis
IOSPHERE
A Multicenter Open-label, Prospective Study to Evaluate the Efficacy and Safety of SIRT Using Yttrium-90 Glass Microspheres Followed by Durvalumab and Tremelimumab for Treatment of Hepatocellular Carcinoma With Portal Vein Thrombosis
2 other identifiers
interventional
80
1 country
6
Brief Summary
Hepatocellular carcinoma (HCC) is the most common primary liver cancer, being the third leading cause of cancer-related death worldwide, with approximately 745 000 deaths reported annually. For advanced patients, including patients with tumoral portal vein thrombosis (PVT), most treatment guidelines recommend systemic therapy, either combination immunotherapy (IO) or combination of immunotherapy and anti-angiogenic treatment for first line option. Results for PVT patients are provided in one trial with a median overall survival of 14.2 months with IO underlying the necessity to improve treatment of PVT patients. Two recent other phase 3 trials also reported positive results for different IO regimen. Selective internal radiation therapy (SIRT) using yttrium-90 (90Y)-loaded glass microspheres (TheraSphereTM) can be used for patients with early stage to locally advanced HCC including PVT patients without extrahepatic spread (EHS). TheraSphereTM is recognized and is reimbursed in France for PVT patients without EHS, since 2019.Several retrospective studies have shown promising results for PVT patients. Nowadays use of SIRT in locally advanced HCC is regaining interest based on the results of the randomized DOSISPHERE-01 study including non-operable patients, about 70% with PVT. This randomized Phase II trial using 90Y-loaded microspheres sought was noted the effectiveness of 90Y-loaded microspheres using a personalized dosimetry approach versus a standard dosimetry approach. The use of a systemic treatment as IO after a locoregional treatment with the strong local debulking effect of SIRT is logical and of interest. Indeed, the most frequent pattern of progression after SIRT is recurrence in an untreated area, including untreated liver or EHS. Patients are then usually referred to IO. Such kind of therapeutic approach, using SIRT followed by IO has already been evaluated in a phase 2 study using nivolumab after 90Y loaded resin microspheres with promising efficacy without safety deterioration. The aim of this study is to evaluate SIRT followed by IO used according to their current indications in advanced HCC patient with PVT patients and without EHS.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P50-P75 for phase_2
Started Feb 2026
Typical duration for phase_2
6 active sites
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
August 7, 2025
CompletedFirst Posted
Study publicly available on registry
August 14, 2025
CompletedStudy Start
First participant enrolled
February 25, 2026
CompletedPrimary Completion
Last participant's last visit for primary outcome
January 2, 2030
ExpectedStudy Completion
Last participant's last visit for all outcomes
January 2, 2030
May 5, 2026
August 1, 2025
3.9 years
August 7, 2025
April 29, 2026
Conditions
Keywords
Outcome Measures
Primary Outcomes (1)
Objective Response Rate (ORR)
The Objective Response Rate (ORR) is defined as the proportion of patients who have either a Partial Response (PR) or a Complete Response (CR) to treatment. CR and PR are the best overall response across all time points of tumor evaluation. Overall tumor response at each time point is assessed according to the modified RECIST criteria for HCC.
Through study completion, an average of 4 years
Study Arms (1)
Hepatocellular carcinoma with portal vein thrombosis and without hepatic spread
EXPERIMENTALPatient will receive selective internal radiation therapy and immunotherapy as per standard of care. SIRT Administration is direct intra-arterial injection in the hepatic artery to target only liver disease and IO will be performed as describe below: * Tremelimumab (Imjudo®): 300 mg IV, one-hour infusion; * Durvalumab (Imfinzi®): 1500 mg IV, one-hour infusion every 4 weeks.
Interventions
SIRT will use Yttrium-90 glass-microspheres (TheraSphereTM). SIRT needs two steps: the treatment simulation (diagnostic angiography and scintigraphy of hepatic perfusion with 99mTc-MAA) and the administration (during a therapeutic angiography).
Tremelimumab should be done 1 to 3 weeks after SIRT and is administrated according to the Summary of Product Characteristic (SPC).
After the end of the tremelimumab infusion, patient receive durvalumab then one injection every 4 weeks until further progression upon investigator decision. Also administrated according to the Summary of Product Characteristic (SPC).
Eligibility Criteria
You may qualify if:
- Age ≥ 18,
- ECOG Performance Status 0-1,
- Histologically proven HCC or noninvasive HCC diagnosis according to LiRADS criteria,
- HCC with Portal vein involvement (PVT), segmental, sectorial or lobar, evaluated by diagnostic imaging (CT scan or MRI),
- At least one measurable lesion≥ 10mm using mRECIST criteria evaluated by diagnostic imaging,
- Tumor involvement \<50% of the liver,
- Hepatic reserve after SIRT ≥ 30% (i.e. hepatic parenchyma not treated with SIRT) evaluated by diagnostic imaging
- No cirrhosis or Compensated cirrhosis (Child Pugh A, ALBI score 1 or 2),
- SIRT indication confirmed by a multidisciplinary team meeting (i.e. patient not a candidate for liver resection, thermal ablation, or transplantation at the time of study),
- Registration with a social security scheme,
- Written and informed consent of the patient.
You may not qualify if:
- Patient with main PVT (partial or complete),
- Extrahepatic metastases (patients with EHS), except hilum node \< 2 cm,
- Previous episode of ascites and/or presence of ascites, even if only seen on imaging without clinical detection (except minimum blade only peri-hepatic),
- Pulmonary insufficiency (defined by an arterial oxygen pressure (PaO2) of \<60 mmHg, or oxygen saturation (SaO2) of \<90% (Roussos \& Koutsoukou, 2003) or clinically evident chronic obstructive pulmonary disease (COPD),
- Medical history of radiation pneumonitis or recent pneumonitis, regardless of causality,
- Previous HCC therapies:
- Any prior systemic treatment for HCC;
- More than 2 prior TACE (or embolization), in the area to be treated;
- Liver resection or ablation \<6 months from end of previous treatment to TheraSphere administration;
- Liver ablation \<3 months from end of previous treatment to TheraSphere administration.
- Prior exposure to immune mediated therapy for HCC or other disease, such as other anti-PD-1, anti-PDL-1, anti-PDL-2, anti-CTLA-4, antibodies, etc.
- Previous liver radiation (external beam radiation therapy (EBRT) or peptide receptor radionuclide therapy (PRRT) or SIRT
- Inadequate hematological, hepatic and renal functions:
- Hemoglobin \<8,5 g/dl;
- Granulocytes \<1500/mm3;
- +41 more criteria
Contact the study team to confirm eligibility.
Sponsors & Collaborators
- Center Eugene Marquislead
- Boston Scientific Corporationcollaborator
Study Sites (6)
CHU de Grenoble
Grenoble, France
CHU de Lille
Lille, France
La Timone
Marseille, France
CHU de Montpellier
Montpellier, France
CHU de Nice
Nice, France
Centre Eugène Marquis
Rennes, France
MeSH Terms
Conditions
Interventions
Condition Hierarchy (Ancestors)
Study Officials
- PRINCIPAL INVESTIGATOR
Etienne Garin, MD PHD
Centre de Lutte Contre Le cancer Eugène Marquis
Central Study Contacts
Study Design
- Study Type
- interventional
- Phase
- phase 2
- Allocation
- NA
- Masking
- NONE
- Purpose
- TREATMENT
- Intervention Model
- SINGLE GROUP
- Sponsor Type
- OTHER
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
August 7, 2025
First Posted
August 14, 2025
Study Start
February 25, 2026
Primary Completion (Estimated)
January 2, 2030
Study Completion (Estimated)
January 2, 2030
Last Updated
May 5, 2026
Record last verified: 2025-08