Research we fund

CMML is a universally lethal blood cancer characterized by increased monocytes (a type of white blood cell) in the peripheral blood and abnormal appearing cells within the bone marrow. Most CMML patients are clinically asymptomatic and remain so for weeks to months following diagnosis, with disease progression remaining inevitable. Despite therapeutic advances in similar blood cancers, no specific molecularly targeted therapies currently exist to treat CMML. Our team aims to identify new therapies and repurpose existing therapies to address the emergent unmet need for new treatments that meaningfully improve, and extend, the lives of patients with CMML.

hypothesize that demonstrating activity of CLL-1 CAR-T (CLL1CART) cell therapy with or without trametinib in pre-clinical models of chronic myelomonocytic leukemia (CMML) and juvenile myelomonocytic leukemia (JMML) is the most efficient method to bring cellular therapy to patients with these orphan diseases. In Aim 1, we will determine the in vitro and vivo efficacy of CAR-T cells redirected against CLL-1 using patient-derived xenograft (PDX) models of CMML and JMML. In Aim 2, we will evaluate the role of combining trametinib with CLL1CART cells. Based on our preliminary data, we hypothesize that trametinib will have direct antileukemia activity and will increase the efficacy of CLL1CART by decreasing T-cell exhaustion and augmenting T-cell fitness.

We will test the efficacy of CAR T cell therapy for CMML. We will modify the tumor microenvironment to enhance their efficacy. and we will upscale CAR T cells to the next level in terms of their genetic structure.

T-cell leukemias and lymphomas have devastating outcomes if they recur after or don’t respond to standard treatment, with the only hope of cure being bone marrow transplant (BMT). Unfortunately, many pediatric, adolescent and young adult (AYA) patients are unable to achieve clinical remission (and thus unable to proceed to BMT) with standard salvage therapies, which are often even more toxic than upfront therapies. Available treatment options for patients with relapsed or refractory T-cell malignancies (particularly pediatric and AYA patients) are lacking, thus 3-year survival rates are <15% for these patients. This proposal aims to study a less toxic, targeted approach using patient or donor-derived T-cells engineered to target an antigen expressed on over 90% of T-cell malignancies that affect pediatric and AYA patients (CD7 Chimeric Antigen Receptor T-cells).

AML recurrence is a devastating event after allo-HCT. I hypothesize that it could be counteracted through targeting of leukemia-restricted mHAgs via TCR-like CARs. I will identify scFVs recognizing mHAg:HLA complexes using a cell-free nanobody screening platform, and test the anti-leukemia activity and safety of CAR-Ts bearing such scFVs in vitro and in vivo. Through this approach, I will build a library of CAR constructs able to provide population-scale coverage for at-risk allo-HCT patients.

Relapsed and/or refractory acute myeloid leukemia (AML) display resistance to Venetoclax and Azacitidine (Ven/Aza) with approximately one third of patients demonstrating upregulated protein synthesis. This proposal will investigate the mechanism(s) underlying the dependence of Ven/Aza-resistant AML on protein synthesis as well as the functional consequences of targeting this pathway. Successful completion of these studies will provide novel insights into Ven/Aza resistance mechanisms.

Richter’s syndrome (RS) is a critical complication of chronic lymphocytic leukemia. RS patients are refractory to most existing therapies and show a median survival of ~12 months. I aim to dissect the function of a frequently mutated gene in RS (i.e., MGA) through cutting-edge single-cell analyses of patient samples and mouse models. The objective of these studies is to understand transformation biology, unravel novel therapeutic vulnerabilities, and provide the basis for personalized therapy.

Winship Cancer Institute is the only NCI-Designated Comprehensive Cancer Center in Georgia, the largest state by land area east of the Mississippi River, and 8th largest state by population. The Winship IMPACT program will leverage existing relationships throughout the state to bring hematology trials to patients in their communities. The goals are to strengthen our relationship with community sites and to increase opportunities for patients to access cutting edge trials throughout our state.

Blood cancers called myeloproliferative neoplasms occur when one of the blood stem cells picks up a mutation. Some patients stay in the chronic phase of the disease for years whereas others rapidly progress with poor outcome. We recently measured when the cancer mutation first occurs and the rate of expansion of the cancer cells in individual patients. We will develop a method that uses the history of disease in each patient to identify those that are at risk of progression.

We recently identified a pervasive, pathogenically relevant mutational mechanism that targets super-enhancers (SE) in DLBCL, leading to target gene deregulation. Here we will dissect the mechanistic role of 3 highly recurrent hotspots in the BCL6, BTG2 and CXCR4 SEs in driving lymphomagenesis and tumor dependency in vitro and in vivo using novel mouse models. These studies will significantly transform our understanding of DLBCL and identify novel therapeutic targets.