APL-501 or Nivolumab in Combination With APL-101 in Locally Advanced or Metastatic HCC and RCC

Inclusion Criteria:

1. Able to understand and comply with the study procedures, understand the risks involved in the study, and provide written informed consent.
2. Men and women 18 years of age or older.
3. Histologically confirmed advanced or metastatic hepatocellular carcinoma that progressed while receiving at least one previous line of systemic therapy, including sorafenib, or who are intolerant of or refused sorafenib treatment following progression on standard therapy including surgical and/or local regional therapies, or standard therapy considered ineffective, intolerable, or inappropriate or for which no effective standard therapy is available.
4. Histologically confirmed advanced or metastatic renal cell carcinoma with clear cell component who received one or two prior lines of antiangiogenic therapy in addition to no more than three previous regimens of systemic therapy including cytokines and cytotoxic chemotherapy agents.
5. Disease according to irRECIST that can be reliably and consistently followed.
6. Documented disease progression during or after the last treatment regimen and within 6 months before study enrollment.
7. Tumor amenable to tumor biopsy and subject agreeable to tumor biopsy at study entry and during therapy with study treatment.
8. Eastern Cooperative Oncology Group (ECOG) performance status of 0-1.
9. Acceptable organ function.

Exclusion Criteria:

1. History of severe hypersensitivity to mAbs, excipients of the APL-501, nivolumab, or APL-101.
2. History of receiving treatment with any c-Met signaling pathway inhibitor (marketed or investigational agents).
3. Prior therapy with anti-PD-1, anti-PD-L1, anti-PDL-2, or anti-CTLA-4 antibody (or any other antibody targeting T cell co-stimulation pathways).
4. Unwilling to swallow orally administered medication whole.
5. Impairment of gastrointestinal function or gastrointestinal disease that may significantly alter drug absorption (e.g., Crohn's, ulcerative colitis, active inflammatory bowel disease, uncontrolled nausea, vomiting, diarrhea, or malabsorption syndrome).
6. Documented and/or known history of human immunodeficiency virus (HIV) for HCC and RCC subjects, or historical seropositive results consistent with active infection for hepatitis C virus (HCV) or hepatitis B virus (HBV) (RCC only).
7. HCC subjects receiving active antiviral therapy for HCV.
8. Active co-infection with HBV and HCV.
9. Active co-infection with HBV and hepatitis D virus.