The role of lipids in autophagy and its implication in neurodegeneration

Authors:

Sergio Hernandez-Diaz1,2 and Sandra-Fausia Soukup1,2

Affiliations:

1 Université de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, 33000, Bordeaux, France.

2 CNRS, Institut des Maladies Neurodégénératives, UMR 5293, 33000, Bordeaux, France.

Keywords: 

autophagy, neurodegeneration, lipids, sphingolipids, phosphoinositols, Parkinson’s disease, Alzheimer’s disease. Abbreviatons:

Aβ – amyloid beta;

AD – Alzhheimer’s disease;

APP – amyloid precursor protein;

ASM – acid SMase;

C1P – Cer-1-phosphate;

Cer – ceramide;

EAP – ethanolamine phosphate;

ER – endoplasmic reticulum;

GABARAP – γ-aminobutyric acid receptor-associated protein;

GBA – glucocerebrosidase;

GCS – GlcCer synthase;

GlcCer – glucosylceramide;

GUV – giant unilamellar vesicle;

HD – Huntington’s disease;

iPSC – induced pluripotent stem cell;

KO – knockout;

LC3 – light chain 3;

LSD – lysosomal storage disorder;

LYNUS – lysosomal nutrient-sensing complex;

MTM – myotubularin phosphatase family;

mTOR – mammalian target of rapamycin;

PD – Parkinson’s disease;

PE – phosphatidylethanolamine;

PI – phosphatidylinositol;

PI3K – PI-3 kinase;

PI3P – PI-3 phosphate;

PICALM – PI binding clathrin assembly protein;

polyQ – polyglutamine;

S1P – sphingosine‑1‑phosphate;

SM – sphingomyelin;

SMase – sphingomyelinase;

Sph – sphingosine;

SphK – Sph kinase;

TFEB – transcription factor EB.

Corresponding Author(s):

Sandra-Fausia Soukup, University of Bordeaux, Neurodegenerative Diseases Institute, UMR 5293, F-33000 Bordeaux, France; Sandra.soukup@u-bordeaux.fr

Conflict of interest statement:

The authors declare no conflict of interest.

Please cite this article as:

Sergio Hernandez-Diaz and Sandra-Fausia Soukup (2020). The role of lipids in autophagy and its implication in neuro-degeneration. Cell Stress 4(7): 167-186. doi: 10.15698/cst2020.07.225

© 2020 Hernandez-Diaz and Soukup. This is an open-access article released under the terms of the Creative Commons Attribution (CC BY) license, which allows the unrestricted use, distribution, and re-production in any medium, provided the original author and source are acknowledged.

Abstract:

Neurodegenerative diseases are, at present, major socio-economic burdens without effective treatments and their increasing prevalence means that these diseases will be a challenge for future generations. Neurodegenerative diseases may differ in etiology and pathology but are often caused by the accumulation of dysfunctional and aggregation-prone proteins. Autophagy, a conserved cellular mechanism, deals with cellular stress and waste product build-up and has been shown to reduce the accumulation of dysfunctional proteins in animal models of neurodegenerative diseases. Historically, progress in understanding the precise function of lipids has traditionally been far behind other biological molecules (like proteins) but emerging works demonstrate the importance of lipids in the autophagy pathway and how the disturbance of lipid metabolism is connected to neurodegeneration. Here we review how altered autophagy and the disturbance of lipid metabolism, particularly of phosphoinositols and sphingolipids, feature in neurodegenerative diseases and address work from the field that suggests that these potentially offer an opportunity of therapeutic intervention.