Young Perspectives for Old Diseases

by

Glaucia Noeli Maroso Hajj

DOI: 10.2174/97816080599281150101
eISBN: 978-1-60805-992-8, 2015
ISBN: 978-1-68108-003-1



Indexed in: EBSCO.

In this book, a great team of young neuroscientists describes the current understanding of common and rare neurodegenerative diseases,...[view complete introduction]
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Huntington’s Disease: A Puzzle from Childhood to Senescence

- Pp. 177-203 (27)

Fabiola M. Ribeiro, Roenick P. Olmo and Tomas Dobransky

Abstract

Huntington’s disease (HD) is an autosomal dominant neurodegenerative disorder caused by a polyglutamine expansion of the huntingtin protein (htt). The progressive neuronal cell loss that takes place in the caudate-putamen and neocortical regions of HD patients leads to motor, cognitive, and psychiatric function deterioration, as well as inevitable death. Although the mutated htt is pointed as the cause of HD, it is still unknown how this mutation can promote neurodegeneration. Postmortem analyses of HD patient’s brains demonstrate the presence of intracellular inclusions containing htt aggregates, which was associated to neuronal death. However, other studies suggest that inclusion formation can be neuroprotective by decreasing the levels of toxic soluble mutant htt. Moreover, many neurotransmitter systems, such as the glutamatergic, dopaminergic, endocannabinoid and trophic factor systems, are also involved in HD progression. For example, it has been demonstrated that the glutamatergic system plays an important role in the excitotoxic neuronal cell loss that takes place in HD. Despite the fact that it is clear that the main cause of HD symptoms is neuronal cell death, no therapeutic approach has yet been developed to rescue or avoid neurodegeneration. To solve this issue, a number of studies are now focusing on developing drugs that could prevent neuronal death, whereas others attempt to implement stem cells to rescue lost neurons. Both approaches have the potential to develop a disease modifying therapeutic strategy, bringing hope to HD patients.

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