IMP3-saRNA Vaccine in Advanced NSCLC

This is an open-label, single-arm, non-randomized, single-center, prospective phase 1 clinical trial. The study will evaluate the safety, tolerability, and preliminary antitumor activity of IMP3-saRNA (YMN-136) vaccine in patients with advanced non-small cell lung cancer. IMP3-saRNA (YMN-136) is a vaccine product prepared from IMP3 self-amplifying RNA and lipid nanoparticles. The study will enroll patients with histologically or cytologically confirmed non-small cell lung cancer who have failed standard treatment, are intolerant to standard treatment, or have refused standard treatment, and whose tumor tissue is positive for IMP3 expression. A total of 9 participants are planned to be enrolled. Participants will enter one of three dose groups sequentially: 50 micrograms, 100 micrograms, or 200 micrograms. Each dose group will include 3 participants. The study will use a 3+3 dose-escalation design. The vaccine will be administered by intramuscular injection. The immunization schedule includes 4 doses, with each dose given 3 weeks apart. The main purpose of the study is to assess safety and tolerability. Dose-limiting toxicity will be assessed from the first vaccination until 14 days after the third vaccination. Safety assessments will include adverse events, serious adverse events, physical examinations, vital signs, ECOG performance status, laboratory tests, 12-lead electrocardiogram, and echocardiography. The study will also preliminarily assess antitumor activity using RECIST version 1.1. Imaging assessments may include CT or MRI and whole-body bone scan. Additional exploratory evaluations may include blood and tumor tissue biomarker analyses, such as ctDNA, tumor markers, immune cell subsets, dendritic cell maturation, antigen-specific cytotoxic T cells, T-cell activation, antibody titers, PD-L1 expression, gene mutation analysis, and other immune-related tests.