A Study of CLSP-1025 in Adult Patients With Solid Tumors That Harbor the p53 R175H Mutation

Prior treatment

• Patients who have received other p53 R175H-directed therapies
• Patients who have not fully recovered from adverse events due to previous anticancer therapies
• Any other primary malignancy within the 2 years prior to enrollment (except for non- melanoma skin cancer, carcinoma in situ (eg, cervix, bladder, breast) or prostate cancer in remission.

Other illness

• Patients with Li-Fraumeni syndrome or other known germline p53 R175H mutation
• Patients with active infection requiring systemic antimicrobial therapy

Other

• Known active central nervous system metastases and/or carcinomatous meningitis

• Patients must be at least 18 years of age at the time of signing the informed consent.
• Patients must be willing and able to provide written informed consent
• Patients must have locally advanced or metastatic solid tumors that have progressed after standard of care therapy or for which no standard therapy exists
• Tumors must harbor a TP53 R175H variant mutation confirmed by an accredited laboratory-based test
• Patients must be HLA-A\*02:01 positive by central assay
• Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1 at the time of enrollment
• Adequate hematological, renal and hepatic function
• Per Investigator judgement, patient is willing and able to complete study visits and/or procedures per the protocol and comply with study requirements for study participation