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Ageing Research Reviews 2003-Oct

Calcium-dependent and aspartyl proteases in neurodegeneration and ageing in C. elegans.

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Chrysanthi Samara
Nektarios Tavernarakis

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概要

Proteolytic mechanisms have been implicated in the process of ageing, and in many neurodegenerative disorders such as Alzheimer's, Parkinson's and Huntington's diseases, which are most prevalent in old age. Simple model organisms such as the nematode Caenorhabditis elegans and the fruit fly Drosophila melanogaster, which offer the prowess of sophisticated genetic approaches, have contributed to our understanding of ageing and neurodegeneration. Intensive research in these systems has resulted in detailed models of the ageing process, and also of several neurodegenerative diseases, which recapitulate same aspects of the human pathologies. Inappropriate cell death is a major component of these and other devastating conditions such as stroke. The dissection of the molecular mechanisms underlying the process of cell degeneration in ageing is of utmost importance. Evidence from investigations in C. elegans implicates deregulated proteolysis as one major determinant of cellular destruction in neurodegeneration and ageing, and suggests that the process depends critically on the activation of calcium-dependent, calpain proteases and lysosomal aspartyl proteases. Apart from shedding light on important but inadequately understood facets of such phenomena, these discoveries hold promise for developing novel, effective intervention strategies aiming to ameliorate or even counter inappropriate cell death.

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