Phase 1 Study of LOP628 in Adult Patients With cKit-positive Solid Tumors and Acute Myeloid Leukemia

Inclusion Criteria:

For patients with solid tumors:

* documented cKit-positive neoplasms
* Patient must have progressive disease as defined by any of the following:
* SCLC: patient has progressed after at least 1 prior therapy
* GIST : patient has relapsed or has refractory disease, and no further approved effective therapeutic option exists
* Patients with other cKit-positive solid tumors: patient has progressed after at least one prior line of therapy and no further approved effective therapeutic option exists
* Patient has measurable disease as per RECIST v1.1 criteria

For patients with AML:

* documented cKit-positive acute myelogenous leukemia
* Consent to newly obtained bone marrow aspirate
* Patient must have progressive disease defined as relapsed or refractory non-PML AML following standard therapy or for whom no effective therapy exists.
* Blast count \< 50,000/mm3

Exclusion Criteria:

For patients with solid tumors:

* Patient has central nervous system (CNS) metastatic involvement unless the CNS metastases have been previously treated and the patient is clinically stable and on a stable dose of corticosteroids for at least 4 weeks prior to enrollment.
* Patient has the presence of other clinically significant hematologic, cardiac, respiratory, gastrointestinal, renal, hepatic or neurological conditions.
* Patient has a history of serious allergic reactions, which in the opinion of the investigator may pose an increased risk of serious infusion reactions
* Patient has been previously treated with cKit directed antibodies
* Pregnant or nursing women

For patients with AML:

* Patient has received prior allogeneic bone marrow transplant (BMT).
* Patient has the presence of other clinically significant cardiac, respiratory, gastrointestinal, renal, hepatic or neurological disease
* Patient has a history of serious allergic reactions, which in the opinion of the investigator may pose an increased risk of serious infusion reactions
* Patient has been previously treated with cKit directed antibodies
* Pregnant or nursing women