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O-GlcNAcylation: A molecular switch linking brain health to neurodegeneration

Nan Shao1, Xiaoyan Zhang2, Yunzhi Ge1

  • 1College of Integrated Chinese and Western Medicine, Anhui University of Chinese Medicine, Hefei, Anhui Province, China.

Neural Regeneration Research
|September 4, 2025
PubMed

Insights

O-linked N-acetylglucosamine (O-GlcNAc) modification is crucial for brain health, regulating proteins and cell signaling. Imbalances in O-GlcNAc contribute to neurodegenerative diseases, but targeting this pathway offers therapeutic potential.

Area of Science:

  • Biochemistry
  • Neuroscience
  • Molecular Biology

Background:

  • Neurodegenerative disorders stem from protein accumulation and nerve cell damage.
  • O-linked N-acetylglucosamine (O-GlcNAc) ylation is a key post-translational modification regulating protein function, cell signaling, and energy balance.
  • Dynamic O-GlcNAc balance is maintained by O-linked N-acetylglucosamine transferase and O-GlcNAcase, crucial for neuronal survival.

Purpose of the Study:

  • To review the role of O-GlcNAc ylation in neurodegeneration.
  • To explore the therapeutic potential of targeting O-GlcNAc ylation in neurological diseases.
  • To elucidate how O-GlcNAc ylation impacts various neurodegenerative conditions.

Main Methods:

  • Literature review of O-GlcNAc ylation in neurodegenerative disorders.
  • Analysis of O-GlcNAc ylation's role in Alzheimer's, Parkinson's, and ALS.
  • Examination of O-GlcNAc ylation's involvement in aging and other neurological conditions.

Main Results:

  • O-GlcNAc ylation differentially affects protein aggregation and neuronal function across disorders.
  • In Alzheimer's, it inhibits toxic protein changes; in Parkinson's, it reduces alpha-synuclein clumps but may affect dopamine.
  • It protects nerve fiber transport in ALS and is implicated in Huntington's, aging, and other neurological diseases.

Conclusions:

  • O-GlcNAc ylation is a critical molecular link between cellular mechanisms and neurodegeneration.
  • Targeted O-GlcNAc ylation therapies, like glucosamine and O-GlcNAcase inhibitors, show promise but require further development.
  • Understanding O-GlcNAc ylation dynamics is essential for developing effective treatments for neurodegenerative diseases.
Keywords:
Alzheimer’s diseaseHuntington’s diseaseO-GlcNAcaseO-linked N-acetylglucosamineO-linked N-acetylglucosamine transferaseParkinson’s diseaseamyotrophic lateral sclerosisneural regenerationneurodegenerationneuronal function

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