Objective response rates with Ori-C101, an armored GPC3-directed CAR-T, in heavily pretreated advanced HCC: Updated results from the phase Ib BEACON study.

2508 Background: Advanced hepatocellular carcinoma (HCC) remains a high unmet-medical-need malignancy with limited therapeutic options. Ori-C101 is a novel, armored, autologous GPC3-directed CAR-T cell therapy. Following promising results from early-phase trials (ChiCTR190028121; NCT05652920, BEACON study), we shall herein update outcomes from the BEACON study with focusing on long-term safety, durability of response, and survival after more than 2 years of follow-up. Methods: This is an open-label, multi-center, phase Ib dose-escalation and expansion study enrolled patients (pts) with GPC3 + advanced HCC who had progressed on ≥2 prior lines of systemic therapy (including ICIs and TKIs). A single dose of Ori-C101 was administered via hepatic arterial infusion to enhance regional cell delivery. Integrated analyses assessed safety, tolerability, PK, and efficacy (per RECIST v1.1)，aiming to determine the RP2D. Results: As of Dec 24, 2025, 19 pts received Ori-C101 infusion across 4 dose levels (DLs). All pts had BCLC stage B/C disease and 31.6% (6/19) had extrahepatic metastases. Pts were previously treated with a median of 3 lines (range 2–8) therapies. Safety: Safety remained manageable; no late-onset nor cumulative toxicities were observed through the extended follow-up period. The most common ≥G3 TEAEs (≥10.0%) were transient hematologic toxicities and hepatic laboratory abnormalities. CRS occurred in 100.0% (19/19) of pts; while ≥G3 CRS observed in 42.1% (8/19). No ICANS occurred. One pt at DL4 experienced a DLT of G4 CRS complicated by secondary DIC. Efficacy: In 18 efficacy-evaluable pts, Ori-C101 demonstrated a robust dose-dependent response. Confirmed ORR was 50.0% (9/18); DCR was 77.8% (14/18). At RP2D (DL3), the confirmed ORR and DCR were 66.7% (6/9) and 88.9% (8/9), respectively. Critically, responses were not only rapid but also remarkably durable. 88.9% (8/9) of responders achieved objective response within 1.1 months; at M3, 83.3% (5/6) of responders at the RP2D remained PR. Notably, 1 pt at DL4 achieved CR with a duration exceeding 20 months. Preliminary overall survival data indicate a substantial long-term survival benefit with a median OS of 14.4 months (range 2.6–22.0). In addition, Dose-Exposure-Responses analysis showed dose-dependent CAR-T cells expansion, pharmacodynamic effects and improved tumor response. Conclusions: Ori-C101 demonstrates a manageable safety profile and compelling, durable anti-tumor activity in GPC3 + advanced HCC. The combination of high ORR and prolonged survival benefit distinguishes Ori-C101 as a potential paradigm-shifting therapy for patients who have failed standard-of-care treatments. A phase II/III study is currently underway to further confirm the efficacy and asses the safety of Ori-C101. Clinical trial information: NCT05652920 .