The study was terminated due to program discontinuation.

This is a first-in-human, open-label, uncontrolled, multi-center, monotherapy dose-escalation and dose expansion study of RO7444973.The aim of this study is to evaluate the safety, pharmacokinetics, pharmacodynamics, and preliminary efficacy of RO7444973 in participants with unresectable and/or metastatic melanoma-associated antigen A4 (MAGE-A4)-positive, solid tumors, carrying the HLA-A*02:01 allele.

Key Inclusion Criteria:

• Unresectable and/or metastatic solid tumors that have received standard-of-care (SOC) therapies previously and have no other SOC options available
• Confirmed HLA-A*02:01 haplotype
• Confirmed MAGE-A4 expression
• Radiologically measurable disease according to Response Evaluation Criteria in Solid Tumors (RECIST) v1.1
• Life expectancy of >/=12 weeks
• Eastern Cooperative Oncology Group (ECOG) performance status of 0-1
• Absence of rapid disease progression, threat to vital organs or non-irradiated lesions >2 cm in diameter at critical sites
• No significant ongoing toxicity from prior anticancer treatment
• Adequate hematological function
• Adequate liver function
• Adequate renal function
• If applicable, willingness to use contraceptive measures.

Key Exclusion Criteria:

• History or clinical evidence of CNS primary tumors or metastases
• Another invasive malignancy in the last 2 years
• Uncontrolled hypertension
• Significant cardiovascular disease
• Known active or uncontrolled bacterial, viral, fungal, mycobacterial, parasitic or other infection
• Current or past history of CNS disease
• Dementia or altered mental status that would prohibit informed consent
• Active auto-immune disease or flare within 6 months prior to start of study treatment
• Expected need for regular immunosuppressive therapy or with systemic corticosteroids
• Insufficient washout from prior anti-cancer therapy
• Prior treatment with a bispecific T-cell engaging or adoptive cell therapy.

Qualified researchers may request access to individual patient level data through the clinical study data request platform (www.vivli.org). Further details on Roche's criteria for eligible studies are available here (https://vivli.org/ourmember/roche/). For further details on Roche's Global Policy on the Sharing of Clinical Information and how to request access to related clinical study documents, see here (https://www.roche.com/research\_and\_development/who\_we\_are\_how\_we\_work/clinical\_trials/our\_commitment\_to\_data\_sharing.htm).