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Macrophages, cells that help engulf and destroy harmful organisms in the body, tend to be characterized as the Jekyll and Hydes of the immune system.Macrophages are essential first responders in fight...
Progression of Chlamydia into upper reproductive tract epithelium and the induction of subsequent immune responses to infection are major contributors to Chlamydia-induced pathogenesis of the genital ...
I would like to thank Elsbeth Walker for giving me the opportunity to complete my MS degree in her lab. I would also like to thank my committee members, Magdalena Bezanilla and Ana Caicedo for sitti...
Apoptosis is a type of programmed cell death that is essential for the development and maintenance of tissue homeostasis in multicellular organisms. Because apoptosis is important in many biological s...
This dissertation is in two parts. The first part investigates the role of lipid signalling pathways in an intracellular phenomenon i.e. the formation of the nuclear envelope. The second part is a stu...
Autoreactive, immature T cells (thymocytes) are deleted from the thymus during development by the process of negative selection. This mechanism occurs when the thymocyte, T cell receptor (TCR) recogni...
Thymocytes undergo negative and positive selection during their development in the thymus. During this selection process, the majority of thymocytes are eliminated by apoptosis. In the first part of t...
Notch is crucial for multiple stages of T cell development, including the CD4+CD8+ double positive (DP) to CD8 + single positive (SP) transition, but regulation of Notch activation is not well underst...
Cell adhesion to the extracellular matrix initiates a cascade of intracellular signaling pathways via integrin activation. Activation of the arachidonic acid (AA) signaling pathway has been shown to b...
Calcium ([Ca2+]i) oscillations, a hallmark of mammalian fertilization, are essential to induce egg activation and embryonic development. As the zygotes transition through the cell cycle, these [Ca 2+]...
Plastids (e.g. chloroplasts) are a diverse group of interrelated organelles that have evolved to perform numerous and diverse metabolic processes within all plant cells, including essential roles in p...
It is becoming increasingly clear that chemicals present in the environment can interfere with thyroid hormone (TH) action and signaling. This is of great concern because TH is critical for normal bra...
A full term pregnancy reduces breast cancer by up to 50%. In rodents, pregnancy or treatment with estrogen and progesterone to mimic pregnancy reduces mammary tumor incidence. The molecular mechanisms...
Notch signaling is an evolutionarily conserved pathway that mediates a variety of cell fate decisions. In the immune system, the Notch pathway plays an important role throughout the life of T cells. C...
Estrogenic compounds can stimulate proliferation of the mammary epithelium, but also potentiate the activity of the p53 tumor suppressor protein. These contradictory activities of estrogenic compounds...

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