A Phase 1 Study to Assess the Safety and Efficacy of LYL845 in Adults With Relapsed and/or Refractory Metastatic or Locally Advanced Melanoma and Selected Solid Tumor Malignancies

This is an open-label, multi-center, dose-escalation study with expansion cohorts, designed to evaluate the safety and anti-tumor activity of LYL845, an epigenetically reprogrammed tumor infiltrating lymphocyte (TIL) therapy, in participants with relapsed or refractory (R/R) metastatic or locally advanced melanoma, non-small cell lung cancer (NSCLC), and colorectal cancer (CRC). During the dose-escalation phase of the study (Part A), participants with melanoma will be enrolled. Once a safe recommended Phase 2 dose range (RP2DR) has been established in Part A, enrollment will be expanded (Part B) to include additional participants with melanoma, NSCLC and CRC.

Inclusion Criteria:

• Age ≥ 18 years up to ≤ 75 years at the time of informed consent
• Confirmed diagnosis of melanoma, non-small cell lung cancer (NSCLC), or colorectal cancer (CRC) that is metastatic or locally advanced or unresectable and is relapsed and/or refractory (R/R) after standard therapy for each tumor histology
• Participants must have received prior systemic treatment for their metastatic disease or locally advanced disease based on tumor type as follows:
• Melanoma: participants with disease progression following an immune checkpoint inhibitor (CPI) and if BRAF-mutated, BRAF/MEK inhibition
• NSCLC: participants with disease progression following at least 1 approved systemic therapy, including an immune CPI-containing regimen for appropriate patients or an approved targeted therapy for known molecular abnormalities if applicable to their disease
• CRC: participants with disease progression following at least 1 line of therapy, including a fluoropyrimidine with oxaliplatin or irinotecan. Microsatellite instability (MSI) high/mismatch repair deficient (dMMR) CRC participants must have disease progression following systemic therapy with immune CPIs.
• Measurable disease including at least 1 lesion that is safely resectable AND a target lesion to measure response and an additional lesion for biopsy
• Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1
• Adequate organ and marrow function
• Women of childbearing potential must have a negative pregnancy test at screening
• All participants must agree to practice highly effective methods of contraception

Exclusion Criteria:

• Prior treatment with adoptive cellular therapy
• Prior solid organ transplantation
• Central nervous system (CNS) involvement of disease that is extensive, symptomatic or untreated, or patients with leptomeningeal disease
• Uncontrolled or symptomatic pleural effusion or ascites
• Untreated or active systemic infection
• Active autoimmune disease requiring treatment or primary immunodeficiency syndrome
• Systemic corticosteroids at a dose of >10 mg of prednisone or equivalent per day
• Other primary malignancy within 3 years prior to enrollment
• Impaired cardiac function or clinically significant cardiovascular disease
• Required chronic anticoagulation, such as warfarin, low molecular weight heparin, or Factor Xa inhibitors
• Pregnant or nursing (lactating) women