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Full-Text Articles in Molecular Biology

Gene Regulatory Mechanisms Driving Temporal Dynamics Of Lineage Specific Differentiation In The Cranial Neural Crest, Maria R. Replogle May 2020

Gene Regulatory Mechanisms Driving Temporal Dynamics Of Lineage Specific Differentiation In The Cranial Neural Crest, Maria R. Replogle

Theses and Dissertations

Genetic and environmental perturbations impacting neural crest (NC) development can result in pleiotropic structural and functional birth defects, many of which are associated with pediatric syndromes. As developmental precursors, the NC has the unique capacity to give rise to a diverse array of ectodermal and mesoectodermal cell types, from neurons and glia of the peripheral nervous system to the cartilage and bone of the face. In order to transition from a multipotent progenitor to a specific cell type, NC cells must undergo a series of dynamic morphological and behavioral transformations that gradually unfold over time. However, the NC is rare …


Role Of Non-Muscle Myosin Ii And Calcium In Zebrafish Midbrain-Hindbrain Boundary Morphogenesis, Srishti Upasana Sahu May 2015

Role Of Non-Muscle Myosin Ii And Calcium In Zebrafish Midbrain-Hindbrain Boundary Morphogenesis, Srishti Upasana Sahu

Theses and Dissertations

Elucidating the molecular mechanisms that play a role in cellular morphogenesis is critical to our understanding of brain development and function. The midbrain-hindbrain boundary (MHB) is one of the first folds in the vertebrate embryonic brain and is highly conserved across species. We used the zebrafish MHB as a model for determining the molecular mechanisms that regulate these cell shape changes. Cellular morphogenesis is tightly regulated by signaling pathways that rearrange the cytoskeleton and produce mechanical forces that enable changes in cell and tissue morphology. The generation of force within a cell often depends on motor proteins, particularly non-muscle myosins …


Development Of Peripheral Innervation In The Frog Xenopus Laevis, Mitali A. Gandhi Aug 2014

Development Of Peripheral Innervation In The Frog Xenopus Laevis, Mitali A. Gandhi

Theses and Dissertations

The skin in Xenopus laevis is innervated by two different sets of mechanosensory neurons at different times during development. Rohon Beard (RB) neurons start differentiating during gastrulation, innervate the embryonic skin and mediate sensory function during hatching. Dorsal Root Ganglion (DRG) neurons start differentiating after neural crest migration, innervate adult epidermal targets and mediate mechanosensory function during larval and adult stages and eventually replace RB neurons. The change in sensory neurons occurs during the transformation of skin, sensory structures, and behavior from their embryonic to their larval forms. We hypothesized that developmental changes in either the sensory end organs or …