Study of MT-302 in Adults With Advanced or Metastatic Epithelial Tumors

Exclusion Criteria30

• Known active CNS metastasis and/or carcinomatous meningitis. Participants with previously treated brain metastases may participate provided they are radiologically stable, (ie, without evidence of progression for at least 4 weeks by repeat imaging), clinically stable, and without requirement of steroid treatment for at least 14 days prior to the first dose of study intervention.
• Pregnant or nursing women.
• Must be \> 28 days beyond major surgery, including hepatectomy or joint replacement.
• Prior allogeneic bone marrow transplantation or solid organ transplant.
• Spinal cord compression not definitively treated with surgery and/or radiation.
• Uncontrolled pleural effusion, pericardial effusion, or ascites requiring recurrent drainage procedures.
• Any acute illness including fever (\> 100.4° F or \> 38° C) within 7 days prior to Day 1
• Active systemic bacterial, fungal, or viral infection within 7 days prior to Day 1. Participant cannot have tested positive for COVID-19 within 7 days prior to Day 1.
• Active infection with human immunodeficiency virus (HIV), hepatitis B virus (HBV), hepatitis C virus (HCV).
• Other primary malignancies, except:
• Adequately treated basal cell or squamous cell carcinoma
• In situ carcinoma of the cervix or bladder, treated curatively and without evidence of recurrence for at least 2 years prior to the study, or
• A primary malignancy which has been completely resected and in complete remission for at least 2 years
• History of (noninfectious) pneumonitis/interstitial lung disease that required steroids or has current pneumonitis/interstitial lung disease.
• Prior grade \> 3 immune-related AEs such as pneumonitis, colitis, hepatitis, nephritis; prior dermatitis and endocrinopathies are allowed provided corticosteroids are no longer required and endocrine-replacement therapy is stable and discontinued from prior therapy.
• Active autoimmune disease not related to prior therapy for primary malignancy that has required systemic therapy in the last 1 year.
• History of symptomatic congestive heart failure (New York Heart Association classes II-IV) or serious active arrhythmias or other clinically significant cardiac disease within 12 months of enrollment.
• Toxicity from previous anti-cancer therapy defined as toxicities (other than alopecia, or laboratory values listed above) not yet resolved to NCI CTCAE v5.0 Grade ≤ 1 or baseline. Participants with chronic Grade 2 toxicities (eg, peripheral neuropathy, laboratory values) may be eligible per the discretion of the Investigator and Medical Monitor.
• Has received:
• Radiotherapy within 2 weeks of first administration of MT-302
• Cytotoxic chemotherapy for treatment of the primary malignancy within 28 days or 5 half-lives, whichever is shorter, of administration of MT-302
• Immune therapy for primary malignancy (eg, monoclonal antibody therapy, checkpoint inhibitors) within 28 days or 5 half-lives, whichever is shorter of first administration of MT-302
• Targeted therapies for primary malignancy within 28 days or 5 half-lives, whichever is shorter, of first administration of MT-302
• Anti-cancer vaccine within 12 weeks of first administration of MT-302
• COVID-19 mRNA vaccine within 6 weeks of first administration of MT-302
• Has received a live vaccine ≤ 6 weeks prior to first administration of MT-302
• Has received packed red blood cells or platelet transfusion within 2 weeks prior to first administration of MT-302
• History of an allergic reaction to any of the excipients
• Enrollment in another interventional clinical trial within 28 days or 5 half-lives of the drug, whichever is shorter, of first administration of MT-302
• Any other condition that, in the opinion of the Investigator, would make the participant unsuitable for the study or unable to comply with the study requirements.