Safety Study of SEA-CD40 in Cancer Patients

Inclusion Criteria:

(Monotherapy - Parts A, B, C, D, G, H, J, and K) -- Histologically confirmed advanced malignancy, either: (a) Metastatic or unresectable solid malignancy; or (b) Classical Hodgkin lymphoma (HL), or diffuse large B-cell lymphoma (DLBCL), or indolent lymphoma (including follicular lymphoma [FL])
(Monotherapy - Parts A, B, C, D, G, H, J, and K) -- Relapsed, refractory, or progressive disease, specifically: (a) Solid tumors: Following at least 1 prior systemic therapy, and no further standard therapy is available for the patient's advanced solid tumor at the time of enrollment; or (b) Classical HL: Following at least 2 prior systemic therapies in patients who are not candidates for autologous stem cell transplant (SCT), or following failure of autologous SCT; or (c) DLBCL: Following at least 1 prior systemic therapy; patients must have also received intensive salvage therapy unless they refused or were deemed ineligible; or (d) Indolent lymphoma: Following at least 1 prior chemoimmunotherapy regimen that included an anti-CD20 monoclonal antibody and for which no other more appropriate treatment option exists
(Combination Therapy - Part E and Part F) -- Histologically or cytologically confirmed advanced or metastatic solid malignancy for which pembrolizumab treatment is approved. In Part F, other advanced solid tumor indications may be eligible as identified by the Sponsor.
(Pancreatic Cancer Cohort - Part L) - Histologically or cytologically confirmed metastatic exocrine ductal adenocarcinoma of the pancreas not amenable to curative therapy. Patients must not have received any prior systemic therapy for metastatic disease; patients who have received prior therapy for non-metastatic pancreatic adenocarcinoma are eligible if therapy was fully completed more than 4 months before start of study treatment.
Representative baseline tumor tissue sample is available (Parts A-K)
Measurable disease
Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1
Adequate baseline hematologic, renal, and hepatic function
Recovery to Grade 1 of any clinically significant toxicity attributed to prior anticancer therapy prior to initiation of study drug administration

Exclusion Criteria:

Parts A-K

Prior chemotherapy, small molecule inhibitors, and/or other investigational anticancer agents (excluding investigational monoclonal antibodies) within 4 weeks
Prior radiotherapy: therapeutic radiotherapy within 4 weeks, or palliative radiotherapy (to non-CNS disease) within 1 week
Prior immune-checkpoint inhibitors within 4 weeks (or 8 weeks, if immuno-oncology doublet used as the prior line of therapy)
Prior monoclonal antibodies, antibody-drug conjugates, or radioimmunoconjugates within 4 weeks (or 2 weeks if patient experienced disease progression on the prior treatment)
Prior T-cell or other cell-based therapies within 12 weeks (or 2 weeks if patient experienced disease progression on the prior treatment)

Part L

History of radiation pneumonitis
Neuropathy Grade 2 or higher
Has received prior therapy with an anti-PD-1, anti-PDL1, or anti-PD-L2 agent, with an agent directed to another stimulatory or co-inhibitory T-cell receptor
Has had allogenic tissue/solid organ transplant

All Parts

Recent or ongoing serious infections within 2 weeks
Known positivity for hepatitis B infection
Known active hepatitis C infection
Active autoimmune or auto-inflammatory ocular disease within 6 months
Known or suspected active organ-threatening autoimmune disease
Active central nervous system tumor or metastases
Patients with lymphomas: prior allogeneic SCT
Patients in Part E, F, or L: history of severe immune-mediated adverse reactions or severe hypersensitivity to pembrolizumab