Parkinson's Disease Clinical Trial
Official title:
Lipopolysaccharide Binding Protein as a Potential Biomarker of Parkinson's Disease
The cause of Parkinson's disease (PD) is currently unknown. Both environmental and genetic factors have been found to contribute to PD pathogenesis. The pathology of PD is distributed throughout the entire nervous system including the central, peripheral, and enteric nervous system. There is evidence that inflammation plays a major role in neurodegeneration in PD. In both the striatum and substantia nigra of PD patients activated microglia were found and proinflammatory cytokines (TNF, IL-1B, IL-6, iNOS) are increased in the CSF. An inflammation-driven animal model has emerged and has been widely accepted as a model of the disease based on lipopolysaccharide (LPS) induced neurotoxicity. LPS is an endotoxin found on the outer membrane of gram negative bacteria and humans are exposed to LPS through the intestinal tract. The intestinal tract and thus the enteric nervous system serve as a conduit to the central nervous system. It has been posited that the inflammatory process could gain access to the lower brainstem via the vagal nerve and then ascend through the basal mid- and forebrain until it reaches the cerebral cortex, producing various pre-motor and motor symptoms of PD along the way. LPS may be one of the inflammatory triggers involved in this process. Systemic exposure to bacterial endotoxin can be determined by measuring plasma LPS binding protein (LBP). A study of 9 patients with early PD (median Hoehn and Yahr stage 2) and age matched controls found that the PD subjects had a significantly lower mean level of plasma LBP compared to control subjects. The aim of the research plan is to establish LBP as a potential biomarker for PD across a spectrum of disease severity.
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Observational Model: Case Control, Time Perspective: Cross-Sectional
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