Neuron-Astrocyte Metabolic Coupling Protects against Activity-Induced Fatty Acid Toxicity.

Abstract:

:Metabolic coordination between neurons and astrocytes is critical for the health of the brain. However, neuron-astrocyte coupling of lipid metabolism, particularly in response to neural activity, remains largely uncharacterized. Here, we demonstrate that toxic fatty acids (FAs) produced in hyperactive neurons are transferred to astrocytic lipid droplets by ApoE-positive lipid particles. Astrocytes consume the FAs stored in lipid droplets via mitochondrial β-oxidation in response to neuronal activity and turn on a detoxification gene expression program. Our findings reveal that FA metabolism is coupled in neurons and astrocytes to protect neurons from FA toxicity during periods of enhanced activity. This coordinated mechanism for metabolizing FAs could underlie both homeostasis and a variety of disease states of the brain.

journal_name

Cell

journal_title

Cell

authors

Ioannou MS,Jackson J,Sheu SH,Chang CL,Weigel AV,Liu H,Pasolli HA,Xu CS,Pang S,Matthies D,Hess HF,Lippincott-Schwartz J,Liu Z

doi

10.1016/j.cell.2019.04.001

subject

Has Abstract

pub_date

2019-05-30 00:00:00

pages

1522-1535.e14

issue

6

eissn

0092-8674

issn

1097-4172

pii

S0092-8674(19)30387-3

journal_volume

177

pub_type

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