Study of ET140203 T Cells in Adults With Advanced Hepatocellular Carcinoma (ARYA-1)

An Open-Label, Dose Escalation, Multi-Center Phase I/II Research Trial to Assess the Safety of ET140203 T Cells and Determine the Recommended Phase II Dose (RP2D) in Adults With Advanced Hepatocellular Carcinoma (HCC) (ARYA-1)

Open-label, dose escalation, multi-center, Phase I / II study to assess the safety of an autologous T-cell product (ET140203) in adult subjects with Alpha-fetoprotein (AFP)-positive/Human Leukocyte Antigen (HLA) A-2-positive advanced hepatocellular carcinoma (HCC).

The purpose of this study is to investigate an autologous T-cell therapy for advanced hepatocellular carcinoma (HCC). ET140203 T cells are autologous T cells genetically modified to carry a TCR-mimic (TCRm) construct capable of mediating cell killing by targeting tumor specific intracellular antigens and addressing solid tumor therapy challenges.

The trial was intended to be a Phase 1/2 trial, but the sponsor terminated the trial prior to moving to Phase 2 to direct their efforts to the pediatric study (ARYA-2) for this product.

Inclusion Criteria:

• Histologically confirmed HCC with serum AFP >100ng/ml at time of screening and following most current line of therapy OR radiographic diagnosis of HCC with serum AFP >400ng/ml at time of screening and following most current line of therapy.
• Metastatic or locally advanced, unresectable HCC
• Must have failed or not tolerated at least two (2) different anti-HCC systemic agents
• Molecular Human Leukocyte Antigen ("HLA") class I allele typing confirms participant carries at least one HLA-A2 allele
• Life expectancy of at least 4 months
• Karnofsky Performance Scale greater than or equal to 70
• At least 1 measurable lesion on imaging by RECIST
• Child-Pugh A6 or better
• Absolute neutrophil count greater than or equal to 1,500/mm^3
• Platelet count greater than or equal to 75,000/mm^3

Exclusion Criteria:

• Clinically significant cardiac disease
• Clinically significant pre-existing illness or active infection
• Clinically significant Central Nervous System (CNS) or neural dysfunction
• Active autoimmune disease requiring therapy
• Active malignancy other than HCC with the exception of cholangiocarcinoma (CCA) or any malignancy with an expected survival ≥ 3 years without any treatment (exception: hormone/androgen-deprivation therapy) and without any organ involvement
• History of organ transplant
• Compromised circulation in portal vein, hepatic vein, or vena cava due to obstruction
• Advanced HCC involving greater than 50% of the liver