Research we fund

Because acute leukemias are very sensitive to radiation, radioisotopes are ideal payloads to arm antibodies against these difficult-to-cure, aggressive blood cancers. Here, we will develop fully human anti-CD123 antibodies carrying the highly potent alpha-emitter astatine-211 (211At) as a new therapy for acute leukemia. CD123 is broadly displayed on acute leukemia cells in most patients and overexpressed on leukemic stem cells but is only found on a small subset of normal blood cells, enabling the use of 211At-CD123 radioimmunotherapy in the transplant and non-transplant setting with limited toxicities to normal tissues.

We have investigated the consequences of p53 loss on stem cell properties, namely clonogenic growth, self-renewal, and drug resistance in multiple myeloma. We have found that both the level of Notch signaling and BCMA impact these properties, and we will explore novel strategies to improve outcomes in p53 mutant multiple myeloma.

Leukemia recurrence remains the most common type of treatment failure after allogeneic hematopoietic cell transplant for children and young adults with high-risk acute myelogenous leukemia (AML), occurring in 40-50% of patients. Novel treatment strategies are needed to attain durable remissions and provide long-term cure. We have developed a novel memory-like (ML) NK cell immunotherapy that has demonstrated potent activity against AML in preclinical and early clinical studies. We propose a new clinical trial combining donor-derived ML NK cells adoptive cellular therapy with modified αβT cell-depleted haploidentical HCT to enhance graft-versus-leukemia and reduce relapse in pediatric and young adult patients with high-risk AML.

T-acute lymphoblastic leukemia (T-ALL) is an aggressive leukemia with limited treatment options after first-line chemotherapy. Our preclinical work in animal models of T-ALL demonstrated the activity of a novel-novel combination treatment strategy, which includes LP-118 (activator of suicide pathways within leukemic cells) and tyrosine kinase inhibitors (inhibiting growth-promoting LCK and ACK1 signaling pathways). Leveraging the mechanistic insights gained from our laboratory work, we propose a phase Ib/II study investigating the feasibility and efficacy of the combined LP-118, ponatinib, and salvage chemotherapy in patients with relapsed T-ALL. This precision medicine approach addresses an unmet need in a fatal disease which lacks effective therapies.

In order to develop a novel immunotherapy approach to treating AML, we propose targeting B7-H3 (CD276), a promising immune checkpoint that has been reported to inhibit NK cell activation. We have generated a novel anti–B7-H3 monoclonal antibody (T-1A5) to block B7-H3 function, showing the best in vitro and in vivo activity against AML cells. We will test the hypothesis that combination strategies such as targeting B7-H3 along with BCL2 inhibition (venetoclax) or IL-15r agonist (NKTR-255) result in synergistic inhibition of AML growth.

Acute myeloid leukemia (AML) is the most fatal type of leukemia and has a high rate of relapse following current therapies. We have recently uncovered that RSPO3-LGR4 pathway is a key regulator of leukemia-initiating cell activity and is exclusively activated in relapsed and refractory AML. Our project aims to investigate the mechanistic link between the pathway activation and therapy resistance, and design combination therapies that would overcome resistance and improve the treatment of relapsed leukemia.

Cellular immunotherapies such CAR-T cells are now firmly established as major pillars of anti-cancer therapy particularly in B-cell malignancies. However, despite their remarkable success in mediating an objective clinical response in up to 90% of patients, long-term durable remissions remain confined to only a minority of patients. It is now increasingly apparent that genetic evolution through the acquisition of new mutations cannot solely explain the molecular basis for therapeutic resistance. Therefore, to meet our ambition of precision medicine we need a better understanding of both the genetic and non-genetic mechanisms of malignant clonal dominance and therapeutic adaptation. To address this important challenge, we have developed new ex vivo and in vivo (mouse models) of resistance to CAR-T therapy. These will be coupled to a synthetic clone tracing strategy termed SPLINTR (Single-cell Profiling and LINeage Tracing) using expressed barcodes. In this proposal we will use SPLINTR in our models to uncover the clone intrinsic properties of cancer cells that enable them to evade these pioneering cellular immunotherapies. This research will deliver a blueprint around which future clinical trial strategies could be enabled to improve outcomes with these ground-breaking therapies.

RAS/MAPK mutations are the key drivers in MM, which occurs in 50% of newly diagnosed and higher in relapsed MM patients. However, RAS remains undruggable in MM. We found that RAS mutation MM growth is highly dependent on germinal center kinase(GCK). The goal of this project is to develop small molecule inhibitors against GCK with the expected outcome to provide novel treatments for relapsed/refractory and especially multi-drug resistant MM with RAS mutation, as well as other B-cell malignancies.

Patients with CLL that have progressed on BTK inhibitors have high risk disease with few clinical options. Here we propose a novel, selective inhibitor of PKCβ, MS-553, as a strategy for these patients. Our project will evaluate this drug alone and in combination with venetoclax preclinically and will perform correlative studies from an ongoing phase 1/2 trial of this drug alone and in combination with venetoclax.

In this project, we will test an innovative therapy called CAR T-cell therapy for children with a type of cancer called AML. In the laboratory, we have identified and developed a powerful CAR T-cell therapy that targets a protein called CD70 on AML cells. We propose to now develop a clinical trial in which we will study the effects of this CD70.CAR T-cell therapy in children with AML.