Alzheimer's disease, oestrogen and mitochondria: an ambiguous relationship

Grimm, Amandine, Lim, Yun-An, Mensah-Nyagan, Ayikoe Guy, Goetz, Jurgen and Eckert, Anne (2012) Alzheimer's disease, oestrogen and mitochondria: an ambiguous relationship. Molecular Neurobiology, 46 1: 151-160.


Author Grimm, Amandine
Lim, Yun-An
Mensah-Nyagan, Ayikoe Guy
Goetz, Jurgen
Eckert, Anne
Title Alzheimer's disease, oestrogen and mitochondria: an ambiguous relationship
Journal name Molecular Neurobiology  (ERA 2012 Listed)    (ERA 2010 Rank B)   Check publisher's open access policy
Publication date 2012-08
Sub-type Article
DOI 10.1007/s12035-012-8281-x
Volume number 46
Issue number 1
ISSN 0893-7648; 1559-1182
Start page 151
End page 160
Total pages 10
Place of publication Totowa, NJ, United States
Publisher Humana Press
Collection year 2013
Language eng
Abstract Hormonal deficit in post-menopausal women has been proposed to be one risk factor in Alzheimer's disease (AD) since two thirds of AD patients are women. However, large treatment trials showed negative effects of long-term treatment with oestrogens in older women. Thus, oestrogen treatment after menopause is still under debate, and several hypotheses trying to explain the failure in outcome are under discussion. Concurrently, it was shown that amyloid-beta (Aβ) peptide, the main constituent of senile plaques, as well as abnormally hyperphosphorylated tau protein, the main component of neurofibrillary tangles, can modulate the level of neurosteroids which notably represent neuroactive steroids synthetized within the nervous system, independently of peripheral endocrine glands. In this review, we summarize the role of neurosteroids especially that of oestrogen in AD and discuss their potentially neuroprotective effects with specific regard to the role of oestrogens on the maintenance and function of mitochondria, important organelles which are highly vulnerable to Aβ- and tau-induced toxicity. We also discuss the role of Aβ-binding alcohol dehydrogenase (ABAD), a mitochondrial enzyme able to bind Aβ peptide thereby modifying mitochondrial function as well as oestradiol levels suggesting possible modes of interaction between the three, and the potential therapeutic implication of inhibiting Aβ–ABAD interaction.
Keyword Alzheimer's disease
Neurosteroids
Oestrogen
Mitochondria
ABAD
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online: 8 June 2012.

Document type: Journal Article
Sub-type: Article
Collections: Queensland Brain Institute Publications
Official 2013 Collection
 
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