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Safety, efficacy, and biological data of T cell-enabling oncolytic adenovirus TILT-123 in advanced solid cancers from the TUNIMO monotherapy phase I trial.
Clinical Cancer Research 2024 March 29
PURPOSE: TILT-123 (igrelimogene litadenorepvec) is an oncolytic adenovirus armed with tumor necrosis factor alpha and interleukin-2, designed to induce T-cell infiltration and cytotoxicity in solid tumors.
PATIENTS AND METHODS: TUNIMO (NCT04695327) was a single-arm, multicenter phase I dose escalation trial designed to assess safety of TILT-123 in advanced solid cancers refractory to standard therapy. Patients received intravenous and intratumoral TILT-123. The primary endpoint was safety by adverse events (AEs), laboratory values, vital signs, and electrocardiograms. Secondary endpoints included tumor response, pharmacokinetics, and predictive biomarkers.
RESULTS: 20 patients were enrolled, with median age of 58 years. Most prevalent cancer types included sarcomas (35%), melanomas (15%) and ovarian cancers (15%). No dose-limiting toxicities were observed. The most frequent treatment related AEs included fever (16.7%), chills (13.0%) and fatigue (9.3%). 10 patients were evaluable for response on day 78 with RECIST 1.1, iRECIST or PET-based evaluation. The disease control rate by PET was 6/10 (60% of evaluable patients) and 2/10 by RECIST 1.1 and iRECIST (20% of evaluable patients). Tumor size reductions occurred in both injected and non-injected lesions. TILT-123 was detected in injected and non-injected tumors, and virus was observed in blood after intravenous and intratumoral injections. Treatment resulted in reduction of lymphocytes in blood, with concurrent lymphocyte increases in tumors, findings compatible with trafficking.
CONCLUSIONS: TILT-123 was safe and able to produce anti-tumor effects in local and distant lesions in heavily pre-treated patients. Good tolerability of TILT-123 facilitates combination studies, several of which are ongoing (NCT04217473, NCT05271318, NCT05222932, NCT06125197).
PATIENTS AND METHODS: TUNIMO (NCT04695327) was a single-arm, multicenter phase I dose escalation trial designed to assess safety of TILT-123 in advanced solid cancers refractory to standard therapy. Patients received intravenous and intratumoral TILT-123. The primary endpoint was safety by adverse events (AEs), laboratory values, vital signs, and electrocardiograms. Secondary endpoints included tumor response, pharmacokinetics, and predictive biomarkers.
RESULTS: 20 patients were enrolled, with median age of 58 years. Most prevalent cancer types included sarcomas (35%), melanomas (15%) and ovarian cancers (15%). No dose-limiting toxicities were observed. The most frequent treatment related AEs included fever (16.7%), chills (13.0%) and fatigue (9.3%). 10 patients were evaluable for response on day 78 with RECIST 1.1, iRECIST or PET-based evaluation. The disease control rate by PET was 6/10 (60% of evaluable patients) and 2/10 by RECIST 1.1 and iRECIST (20% of evaluable patients). Tumor size reductions occurred in both injected and non-injected lesions. TILT-123 was detected in injected and non-injected tumors, and virus was observed in blood after intravenous and intratumoral injections. Treatment resulted in reduction of lymphocytes in blood, with concurrent lymphocyte increases in tumors, findings compatible with trafficking.
CONCLUSIONS: TILT-123 was safe and able to produce anti-tumor effects in local and distant lesions in heavily pre-treated patients. Good tolerability of TILT-123 facilitates combination studies, several of which are ongoing (NCT04217473, NCT05271318, NCT05222932, NCT06125197).
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