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Frontier Researches for the Development of Molecular-targeted Therapies of Familial Parkinson Diseases Yuzuru Imai 1 , Ryosuke Takahashi 2 1Institute of Development,Aging and Cancer,Tohoku University 2Department of Neurology,Kyoto University Graduate School of Medicine Keyword: mitochondria , vesicle transport , oxidative stress , ubiquitin-proteasome , autophagy pp.903-913
Published Date 2009/8/1
DOI https://doi.org/10.11477/mf.1416100535
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Abstract

 Parkinson disease (PD), is a movement disorder pathologically characterized by the progressive loss of dopaminergic neurons in the substantia nigra pars compacta. Although the inherited forms of PD account for only 5 to 10 % of PD cases, the identification of gene mutations in the genes implicated in familial PD in the past 10 years, including the findings regarding the α-synuclein, Parkin, ubiquitin-C-terminal hydrolase-L1 (UCH-L1), PINK1, DJ-1 and the ATP13A2 genes, has advanced understanding of the molecular mechanisms in each case of genetic PD. Most familial forms of PD develop at an early onset. However, recent identification of the leucine-rich repeat kinase (LRRK) 2 gene for a late-onset PD, the clinicopathological feature of which closely resembles that of sporadic PD, is expected to enable the clarification of the underlying causes of general PD. Recent studies on the physiological and pathological functions of these identified gene products have revealed overlapping pathogenetic pathways. The common features of these aberrant pathways are impaired protein degradation/quality control, mitochondrial dysfunction, and altered vesicle transport.

 Several attempts have been made towards developing molecular-targeted therapies directed against mitochondria (e.g.,antioxidants,permeability transition pore modulators,and mitochondrial biogenesis stimulators),protein quality control and vesicle transport (e.g.,gene silencing,immunization of α-synuclein,and protofibril-destabilizing reagents). To ensure the successful implementation of such strategies,it is important to understand the events occuring at an early stage of PD. Further,studies using mammalian PD models for pharmacological analysis combined with studies employing lower organisms for genetic analyses such as worm,fly,and yeast will be helpful to determine effective prevention and treatment strategies for PD,which will replace the conventional symptomatic treatments for PD.


Copyright © 2009, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1344-8129 印刷版ISSN 1881-6096 医学書院

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