A Clinical Study of GO321 in Patients With Advanced Solid Tumors

The goal of this clinical trial is to learn about the safety and tolerability of GO321 recombinant oncolytic virus injection, and if GO321 recombinant oncolytic virus injection works to treat advanced solid tumors in adults whose cancers have progressed after standard-of-care therapy. It will also learn about the pharmacokinetic features, viral shedding, immunogenicity of GO321, immune markers, and genomic and proteomic changes in patients. The main questions it aims to answer are: What safety issues and tolerability limitations do participants experience when receiving GO321 via intratumoral or intracavitary injection? Does GO321 have preliminary anti-tumor efficacy against advanced solid tumors resistant to standard treatment? What changes take place in viral distribution, viral shedding, immunity, blood immune markers, tumor or blood genomics and proteomics after GO321 administration? Researchers will assess different doses and dosing schedules of GO321 given by intratumoral or intracavitary injection across two study phases to find a suitable administration dose and regimen and verify the study endpoints. Participants will: Receive either a single injection of GO321 at different dose levels (in Part 1) or repeated GO321 injections at the recommended Phase 2 dose (in Part 2) by intratumoral or intracavitary routes; Complete scheduled hospital visits to undergo laboratory tests, imaging examinations and biological sample collection; Have their safety indicators, anti-tumor response, viral parameters, immune indicators and molecular profiles tracked throughout the study.