Clinical Trials Search at Vanderbilt-Ingram Cancer Center

The goal of this clinical trial is to evaluate the safety of TOS-358 in adults with select
solid tumors who meet study enrollment criteria. The main questions it aims to answer are:

1. what is the maximum tolerated dose and recommended dose for phase 2?

2. how safe and tolerable is TOS-358 at different dose levels when taken orally once or
twice per day?

This is a Phase 1b open-label, 2-part study in 2 treatment groups. The 2 treatment groups are
as follows:

Treatment Group 1: OP-1250 in combination with ribociclib (KISQALI, Novartis Pharmaceuticals
Corporation).

Treatment Group 2: OP-1250 in combination with alpelisib (PIQRAY, Novartis Pharmaceuticals
Corporation).

This phase I trial evaluates the side effects and best dose of selinexor and venetoclax in combination with chemotherapy in treating patients with acute myeloid leukemia or acute leukemia of ambiguous linage that has come back (relapsed) or does not respond to treatment. Venetoclax may stop the growth of cancer cells by blocking Bcl-2, a protein needed for cancer cell survival. Selinexor may stop the growth of cancer cells by blocking CRM1, which help the body's immune system to find and kill cancer cells. Chemotherapy drugs, such as fludarabine and cytarabine, work in different ways to stop the growth of cancer cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Colony-stimulating factors, such as granulocyte colony-stimulating factor, may increase the production of blood cells and may help the immune system recover from the side effects of chemotherapy. Giving venetoclax and selinexor with chemotherapy may help control the disease in patients with acute myeloid leukemia or acute leukemia of ambiguous lineage.