Lymph node-targeting Amphiphile vaccine is safe; correlation seen for efficacy with T-cell response<\/p>\n<\/h3>\n
By Elana Gotkine HealthDay Reporter<\/b><\/p>\n
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FRIDAY, Jan. 12, 2024 (HealthDay News) — For patients with immunotherapy recalcitrant KRAS-mutated tumors, the cancer vaccine ELI-002 2P is safe and induces T-cell responses, according to a study published online Jan. 9 in Nature Medicine<\/em>.<\/p>\n Noting that the cancer vaccine ELI-002 2P enhances lymph node delivery and immune response using Amphiphile (Amph)-modification of G12D and G12R mutant KRAS (mKRAS) peptides (Amph-Peptides-2P) together with CpG oligonucleotide adjuvant (Amph-CpG-7909), Shubham Pant, M.D., M.B.B.S., from the University of Texas MD Anderson Cancer Center in Houston, and colleagues treated 25 patients (20 with pancreatic cancer; five with colorectal cancer) positive for minimal residual mKRAS disease after locoregional treatment in a phase 1 study involving fixed-dose Amph-Peptides-2P and ascending dose Amph-CpG-7909.<\/p>\n The researchers found no dose-limiting toxicities; the recommended phase 2 dose was 10.0 mg Amph-CpG-7909. Overall, 21, 21, and six patients (84, 84, and 24 percent) had direct ex vivo mKRAS-specific T-cell responses, tumor biomarker responses, and biomarker clearance, respectively. Median relapse-free survival was 16.33 months. There was a correlation seen for efficacy with T-cell response; the median tumor biomarker reduction was \u00e2\u0088\u009276.0 versus \u00e2\u0088\u009210.2 percent. Median relapse-free survival was not reached compared with 4.01 months (hazard ratio, 0.14).<\/p>\n “Overall, this study provides important proof of concept for the safety and immunogenicity of lymph node-targeting Amphiphile vaccines and yielded promising signals of clinical activity that correlate with the magnitude of ELI-002 2P-induced T-cell response,” the authors write.<\/p>\n Several authors disclosed ties to biopharmaceutical companies, including Elicio Therapeutics, which is developing ELI-002 2P and funded the study.<\/p>\n