Treatment of Advanced Endocrine Tumor With Iindividualized mRNA Neoantigen Vaccine (mRNA-0523-L001)

Treatment of advanced endocrine tumors, including adrenal corticocarcnioma (ACC), medullary thyroid carcinoma (MTC), thymic neuroendocrine tumor and pancreatic neuroendocrine tumor is challenging. Previous genomic profiling studies showed they presented a number of somatic mutations. The tumors Individualized mRNA neoantigen vaccine provide a promising solution since a significant portion of these tumors showed high quality of tumor specific neoantigen. The primary objective is to observe and evaluate the safety and tolerability of individualized mRNA neoantigen vaccine (mRNA-0523-L001) for the treatment of advanced endocrine tumors, failure of standard treatment or no standard treatment currently available. The secondary objective is to observe the preliminary efficacy of mRNA-0523-L001 for the treatment of advanced endocrine tumors, failure of standard treatment or no standard treatment currently available, including: 1. Neoantigen-specific CD4+ and CD8+ T lymphocyte responses induced by mRNA-0523-L001; 2. Objective response rate (ORR) and disease control rate (DCR) of tumors; 3. Progression-free survival (PFS).