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Potential Roles of Peroxisomes in Alzheimer's Disease and in Dementia of the Alzheimer's Type.
MedLine Citation:
PMID:  22232008     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
In Alzheimer's disease (AD) and dementia of the Alzheimer's type (DAT), the role played by peroxisomes is not well known. Peroxisomes are present in all eukaryotic cells, with the exception of erythrocytes. They are involved in the β-oxidation process of long-chain fatty acids, very-long-chain fatty acids, and branched-chain fatty acids. They participate in the α-oxidation of phytanic acid, the biosynthesis of bile acids, and the breakdown of eicosanoids. Peroxisomes are also involved in the synthesis of specific fatty acids such as docosahexaenoic acid (DHA), which is essential for the brain and retina, and plasmalogens (PLGN), which play crucial roles in neural cells and are essential components of myelin. Several studies conducted in animal models and in humans provided evidence for a role of DHA in preventing brain degeneration. Significantly lower levels of PLGN were observed in patients with severe dementia. Moreover, a decreased activity of carnitine acetyltransferase, an enzyme present in peroxisome (but also detected in mitochondria, endoplasmic reticulum, and nucleus), was reported in AD patients. We give an overview of the potential role of peroxisomes, especially in the part played by DHA, PLGN, carnitine, and carnitine-dependent peroxisomal enzymes, on the development of AD and DAT. The potential of developing novel therapies targeted on peroxisomal metabolism to prevent cognitive decline and other age-related neurological disorders is discussed.
Authors:
Gérard Lizard; Olivier Rouaud; Jean Demarquoy; Mustapha Cherkaoui-Malki; Luigi Iuliano
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-1-9
Journal Detail:
Title:  Journal of Alzheimer's disease : JAD     Volume:  -     ISSN:  1875-8908     ISO Abbreviation:  -     Publication Date:  2012 Jan 
Date Detail:
Created Date:  2012-1-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9814863     Medline TA:  J Alzheimers Dis     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Centre de Recherche INSERM 866 'Lipides, Nutrition, Cancer', Université de Bourgogne Equipe 'Biochimie du peroxysome, Inflammation et Métabolisme Lipidique', Dijon, France.
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