Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2003-3-11
pubmed:abstractText
Recent epidemiological studies revealed inhibitors of the hydroxymethylglutaryl-coenzyme A reductase, so-called statins, to be effective in lowering the prevalence of Alzheimer's disease (AD). In vitro, statins strongly reduced the cellular amyloid beta-protein load by modulating the processing of the amyloid beta precursor protein. Both observations are probably linked to cellular cholesterol homeostasis in brain. So far, little is known about brain effects of statins. Recently, we could demonstrate that treatment of mice with the lipophilic compound lovastatin resulted in a discrete reduction of brain membrane cholesterol levels. To follow up these findings, we subsequently carried out a further in vivo study including lovastatin and simvastatin as lipophilic agents, as well as pravastatin as a hydrophilic compound, focussing on their efficiency to affect subcellular membrane cholesterol pools in synaptosomal plasma membranes of mice. In contrast to the hydrophilic pravastatin, the lipophilic lovastatin and simvastatin strongly reduced the levels of free cholesterol in SPM. Interestingly, lovastatin and pravastatin but not simvastatin significantly reduced cholesterol levels in the exofacial membrane leaflet. These changes were accompanied by modified membrane bulk fluidity. All three statins reduced the expression of the raft marker protein flotillin. Alterations in transbilayer cholesterol distribution have been suggested as the underlying mechanism that forces amyloidogenic processing of APP in AD. Thus, our data give some first insight in the mode of action of statins to reduce the prevalence of AD in clinical trials.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
http://linkedlifedata.com/resource/pubmed/chemical/Cholesterol, http://linkedlifedata.com/resource/pubmed/chemical/Cyclodextrins, http://linkedlifedata.com/resource/pubmed/chemical/Diphenylhexatriene, http://linkedlifedata.com/resource/pubmed/chemical/Fluorescent Dyes, http://linkedlifedata.com/resource/pubmed/chemical/Lovastatin, http://linkedlifedata.com/resource/pubmed/chemical/Membrane Proteins, http://linkedlifedata.com/resource/pubmed/chemical/Pyrenes, http://linkedlifedata.com/resource/pubmed/chemical/Simvastatin, http://linkedlifedata.com/resource/pubmed/chemical/Trinitrobenzenesulfonic Acid, http://linkedlifedata.com/resource/pubmed/chemical/beta-Cyclodextrins, http://linkedlifedata.com/resource/pubmed/chemical/flotillins, http://linkedlifedata.com/resource/pubmed/chemical/methyl-beta-cyclodextrin, http://linkedlifedata.com/resource/pubmed/chemical/pyrene
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0006-2952
pubmed:author
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
65
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
843-56
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed-meshheading:12628479-Animals, pubmed-meshheading:12628479-Anisotropy, pubmed-meshheading:12628479-Brain, pubmed-meshheading:12628479-Cell Membrane, pubmed-meshheading:12628479-Cholesterol, pubmed-meshheading:12628479-Cyclodextrins, pubmed-meshheading:12628479-Diphenylhexatriene, pubmed-meshheading:12628479-Female, pubmed-meshheading:12628479-Fluorescent Dyes, pubmed-meshheading:12628479-Gene Expression, pubmed-meshheading:12628479-Lovastatin, pubmed-meshheading:12628479-Membrane Proteins, pubmed-meshheading:12628479-Mice, pubmed-meshheading:12628479-Mice, Inbred C57BL, pubmed-meshheading:12628479-Pyrenes, pubmed-meshheading:12628479-Simvastatin, pubmed-meshheading:12628479-Synaptosomes, pubmed-meshheading:12628479-Trinitrobenzenesulfonic Acid, pubmed-meshheading:12628479-beta-Cyclodextrins
pubmed:year
2003
pubmed:articleTitle
Statin effects on cholesterol micro-domains in brain plasma membranes.
pubmed:affiliation
Department of Pharmacology, Biocenter Niederursel, University of Frankfurt, Marie-Curie-Str. 9, Germany.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't