Gonadotropins LH and FSH are secreted by the pituitary in response to hypothalamic GnRH and act to stimulate ovarian follicle development, steroid production and ovulation. Gonadal steroids, including estrogen, enter the circulation and provide neuroendocrine feedback at the hypothalamus and/or pituitary. Estrogen provides negative feedback to suppress gonadotropin release throughout...
Kinesin-1 is a motor protein that transports cargo along microtubules. Inside cells, the majority of kinesin-1 is regulated to conserve ATP and ensure its proper intracellular distribution and coordination with other motors. Regulated kinesin-1 is folded in half, and interactions between coiled-coil regions near the N-terminal enzymatically active heads and...
A tetramer model for HIV-1 Integrase (IN) with DNA representing the LTR termini was previously assembled which predicted amino acid residues on the enzyme surface that interact with the LTR termini (Chen et al, 2006). A separate structural alignment of HIV-1, SIV, and ASV INs predicted which of these residues...
The orderly process of hematopoietic differentiation is governed in large part by the coordinated transcription of specific genes. Deregulation of normal differentiation processes can lead to disease states including immunodeficiency, autoimmune disease, and leukemia. This research focuses on the family of transcription factors known as the early growth response (Egr)...
Senescence, permanent, irreversible replication arrest that occurs in all primary cells studied to date, is considered a cellular model of aging. Recently, senescence has gained attention as a potential tumor-suppressing mechanism. However, despite the obvious importance of senescence, its exact mechanisms remain unclear. One current hypothesis to explain senescence postulates...
Plants, animals, and yeast have the capacity to produce and accumulate neutral lipids, sterol esters and triacylglycerol (TAG). However, their accumulation and the genes underlying their synthesis in intracellular microorganisms are poorly understood.
Plasmodium falciparum is a parasitic protozoan that causes the most virulent form of human malaria. During erythrocytic...
Embryonic stem cells have the potential to differentiate into ectodermal, mesodermal and endodermal derivatives. This property makes them a valuable source of tissue specific progenitor and differentiated cells that can be used for cell replacement therapy. The first goal of this thesis is to test if cardiogenesis from embryonic stem...
Herpesviruses require axonal transport for the successful establishment of infection in peripheral ganglia (retrograde transport), and the subsequent spread to exposed body surfaces following reactivation from latency (anterograde transport). Viral progeny are assembled and spread to other tissues or hosts during egress. I focused on viral proteins which modulate directed...
The small heat shock protein αB-crystallin is expressed primarily in lens and muscle tissue, but it is also found in lung, kidney and many cancers. Regulators of αB-crystallin have been identified almost exclusively using mouse muscle and lens specific models. It has been well documented that αB-crystallin is expressed in...
Epstein Barr Virus (EBV) is associated with malignancies of lymphoid and epithelial origin. While the precise role of EBV in oncogenesis remains elusive, latent membrane protein 2A (LMP2A) is detected in all EBV-associated malignancies, implicating LMP2A in their pathogenesis. Interestingly, LMP2A is expressed in EBV-associated malignancies such as Burkitt's Lymphoma,...