The long-term objective of this proposal is to create more effective means by which to eradicate leukemia stem cells (LSCs). While multiple strategies have been described in the literature, finding approaches capable of broadly targeting LSC populations has remained elusive. We and others have described extensive intra-patient heterogeneity in human LSC populations, which we believe is an important factor to address in creating improved therapeutic regimens. To better understand the cellular and molecular drivers of LSC heterogeneity, we have conducted studies that demonstrate major differences in LSCs that occur purely as a function of their local tissue microenvironment. Particularly striking are differences observed between LSCs in bone marrow and adipose tissue, where upon localization to adipose tissue we observe a strong induction of fatty acid oxidation (FAO), reduced cell cycle activity and increased resistance to chemotherapy drugs. Thus, a central premise of the current application is that intra-patient LSC heterogeneity can arise due to extrinsic (i.e. microenvironmental) factors that vary as a function of anatomical site. Further, our data clearly imply a causal link between the microenvironment-induced metabolic state of LSCs and their sensitivity to drugs. The studies proposed herein are designed to identify and characterize key mechanisms that control LSC metabolism as a function of microenvironment. Lines of investigation will include analysis of cell intrinsic and extrinsic regulators of LSC metabolism.

Public Health Relevance

Acute myelogenous leukemia (AML) is a lethal disease with limited therapeutic options. This grant proposal seeks to develop an improved understanding of tumor biology in order to provide better treatment options for patients with this disease.

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Research Project (R01)
Project #
1R01CA220986-01A1
Application #
9471965
Study Section
Molecular Oncogenesis Study Section (MONC)
Program Officer
Duglas Tabor, Yvonne
Project Start
2017-12-06
Project End
2022-11-30
Budget Start
2017-12-06
Budget End
2018-11-30
Support Year
1
Fiscal Year
2018
Total Cost
Indirect Cost
Name
University of Colorado Denver
Department
Internal Medicine/Medicine
Type
Schools of Medicine
DUNS #
041096314
City
Aurora
State
CO
Country
United States
Zip Code
80045
Ye, Haobin; Adane, Biniam; Khan, Nabilah et al. (2018) Subversion of Systemic Glucose Metabolism as a Mechanism to Support the Growth of Leukemia Cells. Cancer Cell 34:659-673.e6