A Phase 1/2a, Open-Label, Dose Escalation, and Dose Expansion Study to Assess the Safety and Efficacy of GDX012 in Patients With Relapsed or Refractory Acute Myeloid Leukemia

GDX012 is a novel cell therapy developed for the treatment of certain types of cancer,
including Acute Myeloid Leukemia (AML). The main aims of the study are to learn how safe
GDX012 is, how treatment with GDX012 is tolerated and to determine the best dose of
GDX012.

Inclusion criteria:

1. Total body weight of ≥40 kg.

2. Must have pathologically confirmed relapsed or refractory acute myeloid leukemia
(R/R AML) including:

1. Relapsed AML is defined as ≥5% blasts in the bone marrow (BM) or peripheral
blood at any time after achieving a CR, CRh, Cri, or MLFS.

2. Refractory AML is defined as failure to achieve a CR, CRh, Cri, or MLFS after 1
of the following regimens:

i. Two courses of intensive induction chemotherapy. ii. At least 2 cycles of
hypomethylating agent (HMA) or low-dose, cytarabine-based combination regimen.

iii. At least 4 cycles of HMA monotherapy.

3. During dose escalation, participants must be ineligible for hematopoietic stem cell
transplantation (HSCT).

4. Must have an anticipated life expectancy of >3 months before lymphodepletion.

5. Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1.

6. Participants must have adequate renal, cardiac, hepatic, pulmonary and bone marrow
function as defined by the protocol.

Exclusion criteria:

1. Diagnosis of acute promyelocytic leukemia.

2. Has received or plans to receive any of the excluded therapy/treatment within the
specified timeframe before lymphodepleting chemotherapy as defined by the protocol.

3. Prior allogeneic HSCT within 3 months of signing informed consent form (ICF) or with
ongoing requirement for systemic graft-versus-host therapy.

4. Active central nervous system (CNS) involvement.

5. History of malignancy other than non-melanoma skin cancer or carcinoma in situ (eg.
cervix, bladder, breast) low grade prostate cancer without treatment requirement
unless in remission without treatment for ≥2 years.