Research we fund

We seek to understand the genetic and epigenetic etiology of B-cell lymphoma and how deregulation of normal epigenetic programs perturb developmental programs and immune interactions. We approach this using a variety of genomic technologies to interrogate primary human tumors, CRISPR-engineered cell lines, patient-derived xenograft models and transgenic mouse models with different genetic lesions. We hope to understand how genetic and epigenetic changes associated with B-cell lymphoma create dependencies or characteristics that can be targeted through rational therapeutic interventions to improve patient outcomes.

Blood cancers such as leukemia, lymphoma and myeloma may be caused by abnormal regulation of genes that control normal cell growth and development. Genes that are normally active can be silenced and/or genes normally not present in a blood cell are abnormally activated. The result can be an uncontrolled signal for continued cell growth or survival. Our group studies the molecular basis of this gene deregulation using cells cultured in the laboratory, human specimens, and animal models.

We developed a chimeric antigen receptor (CAR) targeting an epitope of the myeloid associated antigen cathepsin G that is processed and presented in the contest of the MHC complex in myeloid leukemic cells. T cells expressing the cathepsin G specific CAR (CG1.CAR) recognize HLA-A2+ myeloid target cells expressing cathepsin G. We intend to study efficacy and safety of CG1.CAR-T cells in preclinical models in preparation of a phase I clinical study in patients with relapsed/refractory AML.

Bone marrow scar formation (fibrosis) is a hallmark of myelofibrosis and contributes significantly to the disease progression. We use mouse genetics to model myelofibrosis and understand the cellular and molecular makeup of the diseased microenvironment. We aim to understand the composition and alteration of the bone marrow microenvironment in myelofibrosis. This may provide novel therapeutic targets for myelofibrosis.

My ultimate goal is to develop more effective, better tolerated, and individualized treatment for patients with AML. This project focuses on AML patients with IDH1 or IDH2 mutations, with a clinical trial evaluating a combination of three agents which are effective in IDH-mutated AML. While these therapies are not curative on their own, my hope is that this combination will lead to a practice changing all-oral, outpatient, and well-tolerated curative strategy for patients with IDH-mutated AML.

Dr. Madhav Dhodapkar, M.D., of Winship Cancer Institute of Emory University, Atlanta, leads a multi-institutional, multi-disciplinary LLS Specialized Center of Research team focused on advancing new immunotherapies for patients with multiple myeloma. Their goal is to improve the effectiveness of CAR T-cell immunotherapy, which engineers the patient’s T cells to find and kill cancer cells. The CAR-T they are studying targets a protein called BCMA found on the surface of all myeloma cells. BCMA-targeting therapies are showing tremendous promise for treating myeloma patients in clinical trials, but many patients eventually relapse. Dr. Dhodapkar’s group is working to understand the mechanisms that cause some patients to be resistant to the treatment. They are also investigating another type of immunotherapy that relies on natural killer T cells. His team includes researchers at Emory as well as Fred Hutchinson Cancer Center in Seattle.

Nearly half of patients with diffuse large B-cell lymphoma (DLBCL), ultimately fail current therapies and die from their disease. Selective targeting of cyclin-dependent kinase 9 (CDK9) is a promising strategy, as evidenced by potent anti-tumor effects in preclinical models of DLBCL. Yet tumors evade therapy by developing resistance. This proposal seeks to both elucidate and circumvent the oncogenic events underlying this resistance in order to offer novel therapeutic approaches to treat DLBCL.

Mantle cell lymphoma (MCL) is an aggressive blood cancer which affects about 3,000 individuals in the United States annually. Despite advances of novel therapies in blood cancers, MCL remains incurable, and patients ultimately succumb to disease. We seek to evaluate longitudinal samples from patients with MCL treated with novel therapies to understand the mechanisms of drug resistance. We identify novel targets, with a particular focus on protein turnover pathways, to overcome drug resistance and improve survival of patients with MCL.

Mutations in the spliceosome gene SF3B1 are common in myeloid malignancies, but they are currently untargetable. Our previous work has shown that SF3B1 mutations reprogram energy metabolism and create vulnerability to restriction of the nonessential amino acid serine. Here we propose a preclinical project studying PEGylated cystathioinine beta synthase (pCBS), a recombinant enzyme that catabolizes serine, as a treatment for SF3B1-mutant myeloid malignancies.

Coming soon.

This project is designed to develop a novel cell therapy to treat relapse/refractory multiple myeloma (MM), an incurable cancer. We target BCMA, a protein highly expressed on MM compared to normal cells, with CAR T cells that also secrete a bispecific antibody that can engage all cytolytic cells, including various endogenous T cells, natural killer (NK) cells, and NKT cells to kill MM cells. We aim to complete all preclinical studies so that the therapy is ready for future clinical studies.

In the current study we propose, based on our preliminary results, that we can reliably identify pre-AML cases out of the many individuals with age related clonal hematopoiesis (ARCH) based on clinical parameters thereby limiting the population that needs to undergo molecular testing. We have also developed a predictive model that can identify pre-AML cases years before diagnosis. We now propose to utilize this knowledge to treat high-risk individuals with ARCH, at a time point before they have developed disease, by targeting the driving alterations most associated with AML development.