Intratumoral N17350 in Advanced Solid Tumors

This is a Phase 1/2 clinical study evaluating an investigational medicine called N17350 in adults with advanced solid tumors that have spread or cannot be removed by surgery and for which standard treatment options are no longer working, are not available, or are not appropriate. N17350 will be administered by injection directly into tumor lesions (intratumoral injection). Giving N17350 into the tumor is intended to deliver treatment to the cancer site and may help stimulate an immune response against the tumor. This is an open-label study, meaning all participants will receive N17350 and both participants and the study team will know the treatment being given. The study is designed to evaluate safety, identify an optimal dose, and look for early signs of anti-tumor activity. Study Parts The study includes two parts: Part 1: Dose Finding (Phase 1) Small groups of participants will receive different dose levels of N17350. The main purpose is to understand how safe N17350 is and to determine a dose that can be given safely and is suitable for further study. Safety information from participants will be reviewed as dose levels are increased or adjusted. Part 2: Dose Expansion (Phase 2) After a dose is selected from Part 1, additional participants will receive N17350 at that dose. This part is designed to better understand safety at the selected dose and to further evaluate how well N17350 may work in participants with advanced solid tumors. Depending on the study plan, expansion may include groups of participants with specific tumor types. Treatment and Visits Participants will receive N17350 injections into tumor lesions every second week for 8 or 12 weeks. Participants will attend clinic visits for treatment administration and ongoing monitoring. Throughout the study, participants will undergo safety evaluations, which may include: Review of side effects and other medical problems Physical examinations and vital signs Blood and urine tests Heart monitoring (such as ECG), if required Review of medications and overall health status Participants will also undergo evaluations to measure how their cancer responds to treatment, which may include: Imaging scans (such as CT or MRI) to measure tumors over time Clinical assessments of injected lesions and other tumor sites Biomarker and Research Samples The study may include collection of blood samples and, when required, tumor samples to help researchers understand how N17350 affects the tumor and the immune system. These samples may be used to study markers of immune activation and other biological changes that could be associated with response or side effects. Outcomes and Goals The main goals of the study are to: Determine the type and frequency of side effects and evaluate overall safety Identify a recommended dose and dosing approach for future studies Evaluate early signs of treatment activity, such as tumor shrinkage, stable disease, or delayed tumor growth Explore biological changes in blood and tumor tissue that may help explain how N17350 works Study Hypothesis The study hypothesis is that N17350 can be administered safely by intratumoral injection at doses that are tolerable, and that treatment may lead to anti-tumor effects in some participants with advanced solid tumors, potentially by helping the immune system recognize and attack cancer cells.