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Updated: May 1, 2026
Selective Depletion of Microglia from Cerebellar Granule Cell Cultures Using L-leucine Methyl Ester
Published on: July 7, 2015
Deoxyglucose prevents neurodegeneration in culture by eliminating microglia
1Department of Biochemistry, University of Cambridge, Tennis Court Road, Cambridge CB2 1QW, UK. gcb3@cam.ac.uk.
Background:
2-Deoxy-D-glucose is an inhibitor of glycolysis, which is protective in animal models of brain pathology, but the mechanisms of this protection are unclear. We examined whether, when and how deoxyglucose protects neurons in co-culture with astrocytes and microglia. Microglia are brain macrophages, which can damage neurons in inflammatory conditions.
Methods:
Deoxyglucose was added to primary cultures of microglia and astrocytes from rat cortex, or neurons and glia from rat cerebellum, or the BV-2 microglial cell line, and cell death and cell functions were evaluated.
Results:
Surprisingly, addition of deoxyglucose induced microglial loss and prevented spontaneous neuronal loss in long-term cultures of neurons and glia, while elimination of microglia by L-leucine-methyl ester prevented the deoxyglucose-induced neuroprotection. Deoxyglucose also prevented neuronal loss induced by addition of amyloid beta or disrupted neurons (culture models of Alzheimer's disease and brain trauma respectively). However, deoxyglucose greatly increased the neuronal death induced by hypoxia. Addition of deoxyglucose to pure microglia induced necrosis and loss, preceded by rapid ATP depletion and followed by phagocytosis of the microglia. Deoxyglucose did not kill astrocytes or neurons.
Conclusions:
We conclude that deoxyglucose causes microglial loss by ATP depletion, and this can protect neurons from neurodegeneration, except in conditions of hypoxia. Deoxyglucose may thus be beneficial in brain pathologies mediated by microglia, including brain trauma, but not where hypoxia is involved.
Insights
2-Deoxy-D-glucose reduces brain inflammation by causing microglial cell death, protecting neurons in models of Alzheimer's disease and brain trauma. However, it worsens neuronal damage during hypoxia.
Area of Science:
- Neuroscience
- Cell Biology
- Biochemistry
Background:
- 2-Deoxy-D-glucose (a glycolysis inhibitor) shows neuroprotection in animal models, but its mechanisms are unclear.
- Microglia, brain macrophages, can exacerbate neuronal damage in inflammatory conditions.
Purpose of the Study:
- To investigate the role and mechanisms of 2-Deoxy-D-glucose in protecting neurons co-cultured with astrocytes and microglia.
- To determine the specific conditions under which 2-Deoxy-D-glucose exerts neuroprotective or detrimental effects.
Main Methods:
- Primary cultures of rat microglia, astrocytes, and neurons were used, alongside the BV-2 microglial cell line.
- Cell death and function assays were performed after deoxyglucose treatment.
- Neuronal loss models included amyloid-beta exposure and physical disruption; hypoxia was also tested.
Main Results:
- 2-Deoxy-D-glucose induced microglial loss via ATP depletion and subsequent phagocytosis, preventing spontaneous and induced neuronal loss.
- Neuroprotection was observed in Alzheimer's disease and brain trauma models but not under hypoxic conditions.
- Hypoxia significantly increased neuronal death in the presence of 2-Deoxy-D-glucose; astrocytes and neurons were not directly killed by deoxyglucose.
Conclusions:
- 2-Deoxy-D-glucose-induced microglial depletion protects neurons by reducing neuroinflammation, except in hypoxic scenarios.
- This compound may benefit microglial-mediated brain pathologies like trauma but is contraindicated where hypoxia is a factor.
