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Amyloid precursor protein controls cholesterol turnover needed for neuronal activity

Pierrot, Nathalie ; Tyteca, Donatienne ; D'auria, Ludovic ; Dewachter, Ilse ; Gailly, Philippe ; Hendrickx, Aurélie ; Tasiaux, Bernadette ; Haylani, Laetitia El ; Muls, Nathalie ; N'Kuli, Francisca ; Laquerrière, Annie ; Demoulin, Jean‐Baptiste ; Campion, Dominique ; Brion, Jean‐Pierre ; Courtoy, Pierre J. ; Kienlen‐Campard, Pascal ; Octave, Jean‐Noël

EMBO molecular medicine, 2013-04, Vol.5 (4), p.608-625 [Periódico revisado por pares]

Weinheim: WILEY‐VCH Verlag

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Título:
Amyloid precursor protein controls cholesterol turnover needed for neuronal activity
Autor: Pierrot, Nathalie ; Tyteca, Donatienne ; D'auria, Ludovic ; Dewachter, Ilse ; Gailly, Philippe ; Hendrickx, Aurélie ; Tasiaux, Bernadette ; Haylani, Laetitia El ; Muls, Nathalie ; N'Kuli, Francisca ; Laquerrière, Annie ; Demoulin, Jean‐Baptiste ; Campion, Dominique ; Brion, Jean‐Pierre ; Courtoy, Pierre J. ; Kienlen‐Campard, Pascal ; Octave, Jean‐Noël
Assuntos: Alzheimer Disease - enzymology ; Alzheimer Disease - genetics ; Alzheimer Disease - metabolism ; Alzheimer's disease ; Amyloid beta-Protein Precursor - genetics ; Amyloid beta-Protein Precursor - metabolism ; Amyloid precursor protein ; Animals ; Astrocytes ; Biosynthesis ; calcium oscillations ; Cells, Cultured ; Cholesterol ; Cholesterol - metabolism ; cholesterol turnover ; Dementia ; Enzymes ; Experiments ; Female ; Genes ; Golgi apparatus ; Homeostasis ; Humans ; Hydroxylase ; Hydroxymethylglutaryl CoA Reductases - genetics ; Hydroxymethylglutaryl CoA Reductases - metabolism ; Hydroxymethylglutaryl-CoA reductase ; Hypotheses ; Lipid metabolism ; Lipids ; Low density lipoprotein receptors ; Male ; Metabolism ; Mevalonate pathway ; Mevalonic acid ; Mevastatin ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Neurodegenerative diseases ; neuron ; Neurons - metabolism ; Peptides ; Potassium ; Protein turnover ; Proteins ; Rats ; Rats, Wistar ; SREBP‐1 ; Statistical analysis ; Sterol Regulatory Element Binding Protein 1 - genetics ; Sterol Regulatory Element Binding Protein 1 - metabolism ; Sterol regulatory element-binding protein ; Transcription ; Variance analysis
É parte de: EMBO molecular medicine, 2013-04, Vol.5 (4), p.608-625
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Descrição: Perturbation of lipid metabolism favours progression of Alzheimer disease, in which processing of Amyloid Precursor Protein (APP) has important implications. APP cleavage is tightly regulated by cholesterol and APP fragments regulate lipid homeostasis. Here, we investigated whether up or down regulation of full‐length APP expression affected neuronal lipid metabolism. Expression of APP decreased HMG‐CoA reductase (HMGCR)‐mediated cholesterol biosynthesis and SREBP mRNA levels, while its down regulation had opposite effects. APP and SREBP1 co‐immunoprecipitated and co‐localized in the Golgi. This interaction prevented Site‐2 protease‐mediated processing of SREBP1, leading to inhibition of transcription of its target genes. A GXXXG motif in APP sequence was critical for regulation of HMGCR expression. In astrocytes, APP and SREBP1 did not interact nor did APP affect cholesterol biosynthesis. Neuronal expression of APP decreased both HMGCR and cholesterol 24‐hydroxylase mRNA levels and consequently cholesterol turnover, leading to inhibition of neuronal activity, which was rescued by geranylgeraniol, generated in the mevalonate pathway, in both APP expressing and mevastatin treated neurons. We conclude that APP controls cholesterol turnover needed for neuronal activity. GWAS identified components of the cholesterol metabolism machinery as important risk factors for Alzheimer's disease. APP is shown here to control neuronal cholesterol turnover, which highlight therapeutic alternatives for AD treatment.
Editor: Weinheim: WILEY‐VCH Verlag
Idioma: Inglês

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Amyloid precursor protein controls cholesterol turnover needed for neuronal activity

Weinheim: WILEY‐VCH Verlag

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