A First-in-Human Study of SON-DP in Participants With Relapsed/Refractory Intolerant to Standard of Care Therapies for Advanced/Metastatic Solid Tumors

This is a first-in-human study testing a new experimental drug called SON-DP in people with advanced solid tumors — including breast, pancreatic, ovarian, and colorectal cancers — whose cancer has not responded to standard treatments. **You may be eligible if...** - You are 18 years or older - You have a confirmed solid tumor that has not responded to or relapsed after standard treatments - You have good physical function (ECOG 0-1) - In the second phase: your cancer is breast, pancreatic, ovarian, or colorectal **You may NOT be eligible if...** - Your cancer is not a solid tumor or not one of the specified types in the expansion phase - Your general health is too poor to tolerate investigational therapy - You have not exhausted standard treatment options Talk to your doctor to see if this trial is right for you.