Molecular Aspects of Neurodegeneration and Neuroprotection


Akhlaq Farooqui , Tahira Farooqui

DOI: 10.2174/97816080509251110101
eISBN: 978-1-60805-092-5, 2011
ISBN: 978-1-60805-376-6

Indexed in: Scopus, Chemical Abstracts, EBSCO.

Neurodegenerative diseases are a complex heterogeneous group of diseases associated with site-specific premature and slow death of cer...[view complete introduction]
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Association of Mitochondrial Signaling in Alzheimer’s Disease and Hypoxia

- Pp. 50-61 (12)

Cristina Carvalho, Sonia C. Correia, Renato X. Santos, Susana Cardoso, Paula I. Moreira, Xiongwei Zhu, Mark A. Smith and George Perry


Neurodegenerative diseases, particularly those associated with aging such as Alzheimer’s disease, represent a significant public health concern. The development of effective treatments is, however, hindered by the complex, multigenic nature of these diseases and by their poorly understood molecular pathophysiology. Mitochondria seem to play a primary role in neurodegeneration, due to the high energy demand of the brain. These organelles are the main producers of energy through the tricarboxylic acid cycle and host a high number of biochemical pathways including those involved in storage and maintenance of intracellular calcium levels, cellular homeostasis and survival pathways. However, mitochondria are a double edge sword. In the presence of certain oxidative stimuli, for instance, when oxygen demand exceeds supply (hypoxia), mitochondria can activate several death pathways. Indeed, hypoxia has been implicated in several neurodegenerative diseases including Alzheimer’s disease. Current knowledge supports the idea that during hypoxic events mitochondrial complex III produces high levels of reactive oxygen species (ROS), which play a key role in the regulation of the transcription factor hypoxia inducible factor 1 that triggers several death effectors. In this chapter we will discuss the involvement of mitochondria in AD putting focus on the mitochondrial pathways activated by hypoxia, which could eventually lead neurodegenerative events.

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