NCT07535840

A Clinical Trial of Firsekibart, Tislelizumab, and Lenvatinib in Patients With Unresectable, TP53-Mutated Hepatocellular Carcinoma

• Status: Not Yet Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 25 (estimated)
• Sponsor: Tongji Hospital · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

This study aims to evaluate the effectiveness and safety of a combination therapy with Fuxinqibai monoclonal antibody, Tislelizumab, and Lenvatinib in patients with advanced, unresectable TP53-mutated hepatocellular carcinoma (HCC) who have previously failed systemic immunotherapy. Eligible patients will receive: Fuxinqibai 200 mg IV every 3 weeks Tislelizumab 200 mg IV every 3 weeks Lenvatinib 8 mg (≤60 kg) or 12 mg (\>60 kg) orally once daily Treatment will continue until disease progression, unacceptable toxicity, start of a new anticancer therapy, withdrawal of consent, or other protocol-defined reasons. Tumor response will be evaluated by RECIST v1.1 every 6 weeks, and confirmed after 4 weeks if response is observed. Safety will be monitored through adverse events and laboratory tests, graded according to NCI CTCAE v5.0. After treatment ends, patients will be followed every 6 weeks for tumor assessment and every 12 weeks for survival, until death, loss to follow-up, or withdrawal of consent. Primary Objective: To assess the objective response rate (ORR) of the combination therapy. Secondary Objectives: To evaluate overall efficacy, safety, and explore potential biomarkers predicting treatment response.

Detailed description

Study Title Evaluation of Firsekibart Combined with Tirelizumab and Lenvatinib in Patients with Unresectable, Advanced TP53-Mutant Hepatocellular Carcinoma After Progression on Prior Systemic Immunotherapy: An Open-Label, Single-Arm Clinical Study Brief Summary This open-label, single-arm study investigates the efficacy and safety of Firsekibart in combination with Tirelizumab and Lenvatinib in adult patients with unresectable, advanced TP53-mutant hepatocellular carcinoma (HCC) who have progressed after prior PD-1/PD-L1-based systemic immunotherapy. The primary objective is to determine the objective response rate (ORR). Secondary objectives include disease control rate (DCR), duration of response (DOR), progression-free survival (PFS), overall survival (OS), safety and tolerability, quality of life (QoL), pathological response, patterns of disease progression, and exploration of predictive biomarkers in tumor tissue and blood. Study Design This study consists of three phases: screening, treatment, and follow-up. Eligible patients will receive treatment in 3-week cycles. Treatment Regimen Firsekibart: 200 mg IV on Day 1 of each 3-week cycle Tirelizumab: 200 mg IV on Day 1 of each 3-week cycle, administered 1 hour after Firsekibart Lenvatinib: 8 mg/day orally if ≤60 kg or 12 mg/day if \>60 kg Treatment continues until disease progression, unacceptable toxicity, initiation of new anticancer therapy, withdrawal of consent, death, or investigator decision. Dose adjustments follow protocol-defined criteria. Efficacy Assessments Primary Endpoint: ORR per RECIST v1.1 Secondary Endpoints: DCR per mRECIST DOR PFS OS Safety and tolerability (AEs, SAEs, lab abnormalities, ECG changes) QoL Pathological response Disease progression patterns (intrahepatic, vascular invasion, extrahepatic spread) Predictive biomarkers in tumor tissue and blood Imaging (enhanced CT or MRI) is performed at baseline and every 6 weeks (±7 days) during treatment. Confirmatory scans are required for any partial or complete response after 4 weeks. Safety Assessments AEs are graded per NCI CTCAE v5.0. Safety monitoring includes laboratory evaluations, ECG, vital signs, and physical exams. SAEs and treatment-related AEs are recorded. Additional evaluations may be performed based on clinical judgment. Eligibility Criteria Inclusion Criteria Age ≥18 years; able to provide informed consent Histologically or cytologically confirmed advanced or unresectable HCC TP53 mutation confirmed by central laboratory testing from fresh liver tumor biopsy Progression after at least one prior PD-1/PD-L1 therapy Disease assessed by MDT as unresectable (R0 resection not feasible, insufficient functional liver volume, or multifocal disease) BCLC stage B or C At least one measurable lesion per RECIST v1.1 ECOG performance status 0-1 Child-Pugh A liver function Adequate hematologic, hepatic, renal, and coagulation function Life expectancy ≥12 weeks Effective contraception for women of childbearing potential and male partners Ability to comply with study procedures and visit schedule Exclusion Criteria Eligible for curative local therapy Mixed or sarcomatoid HCC or other malignancies Hematologic malignancy Hepatic encephalopathy or liver transplant history Symptomatic effusions requiring intervention Active viral hepatitis exceeding protocol thresholds (HBV DNA \>2000 IU/mL, HCV RNA \>10³ copies/mL) HIV infection CNS metastases Recent major bleeding or thromboembolic events Uncontrolled cardiovascular or pulmonary disease Active autoimmune disease requiring systemic therapy within 2 years Prior immunosuppressive therapy within 4 weeks (with exceptions) Major surgery within 4 weeks Pregnancy or breastfeeding Extensive metastatic disease (≥5 lesions, major vascular involvement) Participation in other clinical trials within 4 weeks Any condition increasing risk or interfering with study participation per investigator judgment Study Procedures Screening Phase: Informed consent, baseline labs, imaging, and TP53 testing Treatment Phase: 3-week cycles of Firsekibart + Tirelizumab + Lenvatinib; tumor response assessed every 6 weeks Dose Modifications: Based on toxicity and body weight changes Safety Monitoring: Labs, ECG, physical exam, AE reporting; additional checks per clinical indication Follow-Up Phase: Survival assessments every 12 weeks until death, loss to follow-up, or withdrawal of consent Statistical Analysis Analysis Sets: Full analysis set (FAS), per-protocol set (PPS), safety set (SS) Descriptive Statistics: Mean, SD, median, min, max for continuous variables; frequency and proportion for categorical variables Efficacy Analysis: ORR and DCR as proportions; PFS and OS estimated using Kaplan-Meier method with 95% CI Safety Analysis: Incidence of AEs, SAEs, lab abnormalities, and ECG changes; coded per MedDRA Interim Analysis: After first 10 patients complete ≥3 cycles, evaluate early efficacy to determine continuation Sample Size and Duration Phase 1: 10 patients; proceed to Phase 2 if ≥3 responders observed Phase 2: Enroll additional patients to reach ≥25 total Total enrollment expected within 12 months Observation period: 24 months Treatment continues until progression, unacceptable toxicity, or discontinuation criteria met Withdrawal and Study Termination Patients may withdraw for: Requesting discontinuation of study treatment Clinically significant AEs or lab abnormalities Investigator judgment for safety or compliance reasons Loss to follow-up or death Study may be terminated by investigator if continuation is deemed unsafe or unfeasible. Conclusion This study evaluates Firsekibart combined with Tirelizumab and Lenvatinib in TP53-mutant, unresectable HCC post-immunotherapy. The protocol includes comprehensive eligibility criteria, standardized dosing, rigorous safety and efficacy monitoring, and biomarker exploration. The results aim to provide critical evidence for the clinical utility of this combination in a well-defined high-risk population.

Conditions

• HCC - Hepatocellular Carcinoma
• TP53 Gene Mutation
• Unresectable
• Resistant Cancer

Interventions

Type	Name	Description
DRUG	Firsekibart + Tislelizumab + Lenvatinib	Participants will receive Firsekibart 200 mg IV on Day 1 every 3 weeks, followed 1 hour later by Tislelizumab 200 mg IV on Day 1 every 3 weeks, and Lenvatinib orally once daily (8 mg for ≤60 kg or 12 mg for \>60 kg). Treatment continues until disease progression, unacceptable toxicity, initiation of new anti-tumor therapy, withdrawal of consent, or other protocol-specified discontinuation criteria.

Timeline

• Start date: 2026-05-01
• Primary completion: 2026-12-01
• Completion: 2027-06-01
• First posted: 2026-04-17
• Last updated: 2026-04-17