Cited by 89Alzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration MechanismsCholesterol and Lipid Metabolism

Expression profiling in APP23 mouse brain: inhibition of Aβ amyloidosis and inflammation in response to LXR agonist treatment

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Lefterov, Iliya, Bookout, Angie, Wang, Zhu, Staufenbiel, Matthias, Mangelsdorf, David, Koldamova, Radosveta·2007·Molecular Neurodegeneration

Abstract

BACKGROUND: Recent studies demonstrate that in addition to its modulatory effect on APP processing, in vivo application of Liver X Receptor agonist T0901317 (T0) to APP transgenic and non-transgenic mice decreases the level of Abeta42. Moreover, in young Tg2576 mice T0 completely reversed contextual memory deficits. Compared to other tissues, the regulatory functions of LXRs in brain remain largely unexplored and our knowledge so far is limited to the cholesterol transporters and apoE. In this study we applied T0 to APP23 mice for various times and examined gene and protein expression. We also performed a series of experiments with primary brain cells derived from wild type and LXR knockout mice subjected to various LXR agonist treatments and inflammatory stimuli. RESULTS: We demonstrate an upregulation of genes related to lipid metabolism/transport, metabolism of xenobiotics and detoxification. Downregulated genes are involved in immune response and inflammation, cell death and apoptosis. Additional treatment experiments demonstrated an increase of soluble apolipoproteins E and A-I and a decrease of insoluble Abeta. In primary LXRwt but not in LXRalpha-/-beta-/- microglia and astrocytes LXR agonists suppressed the inflammatory response induced by LPS or fibrillar Abeta. CONCLUSION: The results show that LXR agonists could alleviate AD pathology by acting on amyloid deposition and brain inflammation. An increased understanding of the LXR controlled regulation of Abeta aggregation and clearance systems will lead to the development of more specific and powerful agonists targeting LXR for the treatment of AD.

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  1. Riddell DR Zhou H Comery TA Kouranova E Lo CF Warwick HK Ring RH Kirksey Y Aschmies S Xu J Kubek K Hirst WD Gonzales C Chen Y Murphy E Leonard S Vasylyev D Oganesian A Martone RL Pangalos MN Reinhart PH Jacobsen JS The LXR agonist TO901317 selectively lowers hippocampal Ab 42 and improves memory in the Tg2576 mouse model of Alzheimer's disease Molecular and Cellular Neuroscience 2007 34 621 628 17336088 10.1016/j.mcn.2007.01.011 · DOI · Paper page

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Authors
Lefterov, I., Bookout, A., Wang, Z., Staufenbiel, M., Mangelsdorf, D., & Koldamova, R.
Affiliations
  • University of Pittsburgh (US)
  • Howard Hughes Medical Institute (US)
  • Novartis Institutes for BioMedical Research (CH)
Corresponding author
  • Lefterov, Iliya
  • Koldamova, Radosveta
Venue
Molecular Neurodegeneration
Published
2007
Volume
2
Issue
1
Pages
20
ISSN
1750-1326 (ISSN-L)
OpenAlex
W2149217753
Cited by
89
References
61
Citations by year
2025: 6 · 2024: 1 · 2023: 9 · 2022: 4 · 2021: 8 · 2020: 2 · 2019: 2 · 2018: 3 · 2017: 4 · 2016: 2 · 2015: 6 · 2014: 3 · 2013: 10 · 2012: 4
FWCI
4.47
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Molecular Neurodegeneration (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Howard Hughes Medical Institute
  • Alzheimer's Association
  • National Institute on Aging (R03AG028794, R03AG023304)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Surgery › Cholesterol and Lipid Metabolism
Keywords
liver X receptor agonist, T0901317, APP23 mice, Alzheimer's disease, amyloid-beta, amyloid-beta 42, neuroinflammation, gene expression profiling, lipid metabolism, xenobiotic metabolism, apolipoprotein E, apolipoprotein A-I, microglia, astrocytes, lipopolysaccharide, fibrillar amyloid-beta

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