alexa New Therapeutic Modalities For Alzheimers Disease
ISSN: 2329-6895

Journal of Neurological Disorders
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International Conference on Neurological Disorders & Stroke and Neurooncology
April 24-25, 2017 Dubai, UAE

Suhail Rasool and Charles Glabe
Auburn University, USA
University of California, Irvine, USA
Posters & Accepted Abstracts: J Neurol Disord
DOI: 10.4172/2329-6895-C1-018
Abstract
Genetic analysis of familial forms of Alzheimer's disease (AD) causally links the proteolytic processing of the amyloid precursor protein (APP) and AD. However, the specific type of amyloid and mechanisms of amyloid pathogenesis remain unclear. We conducted a detailed analysis of intracellular amyloid with an aggregation specific conformation dependent monoclonal antibody, M78, raised against fibrillar Aß42. M78 immunoreactivity colocalizes with Aß and the carboxyl terminus of APP (APP-CTF) immunoreactivities in perinuclear compartments at intermediate times in 10 month 3XTg-AD mice, indicating that this represents misfolded and aggregated protein rather than normally folded APP. At 12 months, M78 immunoreactivity also accumulates in the nucleus. Neuritic plaques at 12 months display the same spatial organization of centrally colocalized M78, diffuse chromatin and neuronal nuclear NeuN staining surrounded by peripheral M78 and APP-CTF immunoreactivity as observed in neurons, indicating that neuritic plaques arise from degenerating neurons with intracellular amyloid immunoreactivity. The same staining pattern was observed in neuritic plaques in human AD brains, showing elevated intracellular M78 immunoreactivity at intermediate stages of amyloid pathology (Braak A and B) compared to no amyloid pathology and late stage amyloid pathology (Braak 0 and C, respectively). These results indicate that intraneuronal protein aggregation and amyloid accumulation is an early event in AD and that neuritic plaques are initiated by the degeneration and death of neurons by a mechanism that may be related to the formation of extracellular traps by neutrophils.
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