Fat represents an important source of energy for ovarian cancer (OC) cells and is supplied either through import from the tumor milieu or via de novo lipogenesis. During fast tumor growth, when nutrients are scarce, lipogenesis becomes the primary source of fatty acids. Stearoyl-CoA desaturase (SCD), a rate-limiting enzyme in...
Preterm birth (PTB) is the leading cause of infant morbidity worldwide. Approximately 380,000 babies are born prematurely in the USA every year. Estrogen (E2) and progesterone (P4) play essential roles during pregnancy and labor; a clear understanding of their action mechanisms, however, is lacking. E2 and P4 function by activating...
Understanding the regulatory programs enabling cancer stem cells (CSCs) to self-renew and drive tumorigenicity could identify new treatments. Through comparative chromatin state and gene expression analyses in CSCs vs. non-CSCs, we identified FOXK2 as a highly expressed stemness-specific transcription factor (TF). Its genetic depletion diminished stemness features and reduced tumor...
Reproduction requires a complex orchestration of processes from the formation of the reproductive system through the successful development of the fetus, and nutrients are necessary to fuel these processes during many aspects of reproduction. Zinc is an essential metal that is fundamental in gamete maturation, gonadogenesis, and fertilization. Disruption in...
Infection with the novel coronavirus, SARS-CoV-2, results in pneumonia and other respiratory symptoms as well as pathologies at diverse anatomical sites. An outstanding question is whether these diverse pathologies are due to replication of the virus in these anatomical compartments and how and when the virus reaches those sites. To...
Membrane contact sites (MCSs) facilitate communication and organization of organelles that contribute to fundamental cellular processes. It has become increasingly appreciated how extensive and essential MCSs are for cellular health, and this field is rapidly growing. We use budding yeast as a model system to study the mechanisms of how...
Prostate cancer is the most common cause of cancer among men in the United States, and the second most common cause of cancer-related death, accounting for significant morbidity and mortality. This dissertation describes the genomic landscape of prostate cancer from multiple angles to identify mechanisms of disease heterogeneity amongst patients....
RNA viruses cause a wide range of diseases that range from mild respiratory illness to fatal hemorrhagic fevers. To combat these pathogens, most cells in the human body scan the cell for viruses and activate a potent cell-intrinsic immune response by producing interferon (IFN), a cytokine that amplifies the innate...
Amyotrophic lateral sclerosis (ALS) is a devastating neurodegenerative disease characterized by motor neuron (MN) degeneration and resulting in progressive paralysis and death. ALS is genetically heterogeneous, disease pathophysiology is not completely understood, and there are no effective drug therapies. To develop broadly applicable therapeutics, we examine disease mechanisms in the...
Mitochondria-lysosome contacts are recently identified sites for mediating crosstalk between both organelles, but their role in normal and diseased human neurons remains unknown. We used super-resolution and live-cell microscopy in human iPSC-derived neurons to demonstrate that mitochondria-lysosome contacts can dynamically form in the soma, axons, and dendrites of human neurons,...