Functional analysis of proteins associated with aggregation and neurodegeneration utilizing the model organism Caenorhabditis elegans

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dc.contributor Boyd, Lynn
dc.contributor O'Donnell, Janis M.
dc.contributor Stephenson, Edwin C.
dc.contributor Churchill, Perry F.
dc.contributor Caldwell, Guy A.
dc.contributor.advisor Caldwell, Kim A. Tucci, Michelle Leann 2017-03-01T16:33:59Z 2017-03-01T16:33:59Z 2012
dc.identifier.other u0015_0000001_0000960
dc.identifier.other Tucci_alatus_0004D_11207
dc.description Electronic Thesis or Dissertation
dc.description.abstract The common characteristic of many neurodegenerative diseases is protein aggregation and the formation of toxic fibrils. This is definitely the case with the proteins alpha-synuclein (α-syn), TAR DNA Binding Protein 43 (TDP-43) and Superoxide Dismutase (SOD1) that contribute to the toxicity of Parkinson's Disease (PD), Frontotemporal Dementia (FTD) and Amyotrophic Lateral Sclerosis (ALS), respectively. Not only do these aggregate-prone proteins influence the demise of the nervous system, there are other genetic and environmental factors that assist in exacerbating the phenotypes of these diseases. Each of these diseases impact older individuals, which strongly correlates with an age-dependent decline in overall cellular homeostasis. Therefore, with the influence of genetics and environmental factors on aging individuals, there are multiple avenues to explore in search for therapeutics to prevent or slow down the progression of these diseases. Using model organisms, like Caenorhabditis elegans (C. elegans), is pivotal to studying age-related diseases as they can be manipulated genetically, exposed to pharmaceuticals, and analyzed quickly due to their short lifespan and high fecundity. They exhibit behaviors and morphological changes that correlate with modifications to their nervous system when perturbed. These model systems have been exploited in finding modifiers of toxicity, as they have expedited the search for treatments and cures in a cost-effective and efficient manner. Using C. elegans as our model system, we have explored the role of GAIP Interacting Protein C-terminus (GIPC) and its role in regulating endocytosis in protecting against α-syn induced neurodegeneration in the DA neurons. Using cell-specific RNAi, we have highlighted the earliest stages of endocytosis (receptor desensitization, internalization and early endosomal trafficking) as factors that assist the worm homolog of GIPC, C35D10.2, in neuroprotection. In addition to the PD model, we have also worked to establish a model of TDP-43 proteinopathy by examining the protein localization of WT and ALS-associated variants, determining if the cytoplasmic mislocalization and/or aggregation is necessary to elicit neuronal toxicity. Finally, using an established ALS worm model, we have demonstrated that a key chaperone, torsinA, has the ability to ameliorate ER stress and locomotive defects associated with mutant SOD1 by promoting ER-associated degradation (ERAD).
dc.format.extent 182 p.
dc.format.medium electronic
dc.format.mimetype application/pdf
dc.language English
dc.language.iso en_US
dc.publisher University of Alabama Libraries
dc.relation.ispartof The University of Alabama Electronic Theses and Dissertations
dc.relation.ispartof The University of Alabama Libraries Digital Collections
dc.relation.hasversion born digital
dc.rights All rights reserved by the author unless otherwise indicated.
dc.subject.other Molecular biology
dc.title Functional analysis of proteins associated with aggregation and neurodegeneration utilizing the model organism Caenorhabditis elegans
dc.type thesis
dc.type text University of Alabama. Dept. of Biological Sciences Biological Sciences The University of Alabama doctoral Ph.D.

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