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Updated: Nov 16, 2025
10:23
Lipid Droplet Isolation for Quantitative Mass Spectrometry Analysis
Published on: April 17, 2017
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Astrocytes in stress accumulate lipid droplets
Tina Smolič1, Petra Tavčar1, Anemari Horvat1,2
1Laboratory of Neuroendocrinology-Molecular Cell Physiology, Faculty of Medicine, Institute of Pathophysiology, University of Ljubljana, Ljubljana, Slovenia.
Glia
|February 20, 2021
Summary
Brain astrocytes accumulate lipid droplets (LDs) under stress, crucial for cell survival and potentially neuroprotection. Understanding LD dynamics in astrocytes is key to brain health during pathology.
Area of Science:
- Neuroscience
- Cell Biology
- Biochemistry
Background:
- Lipid droplets (LDs) accumulate in brain glial cells during pathology, but mechanisms in astrocytes are unclear.
- Astrocytes, crucial for brain homeostasis, show poorly understood LD accumulation patterns.
Purpose of the Study:
- Investigate the (sub)cellular localization, mobility, and content of LDs in astrocytes under stress.
- Elucidate the role of LD turnover in astrocyte survival and response to brain pathologies.
Main Methods:
- Fluorescent microscopy of LDs in rat astrocytes and Drosophila glia-like cells.
- Electron microscopy to visualize LD-organelle interactions.
- Enzyme inhibition (DGAT1/2) to study LD biogenesis impact.
Main Results:
- LDs showed confined mobility near mitochondria and ER, altered by metabolic stress and Ca2+.
- Inhibition of LD biogenesis reduced astrocyte numbers by ~40%.
- Noradrenaline, metabolic, and hypoxic stress significantly increased LD accumulation in astrocytes.
Conclusions:
- LD turnover is vital for astrocyte survival and proliferation.
- Stressed astrocytes accumulate LDs, potentially for energy provision and neuroprotection against lipotoxicity.
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