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Phosphorylated eukaryotic translation factor 4E is elevated in Alzheimer brain.
Xu Li1, Wen-Lin An, Irina Alafuzoff
1Division of Experimental Geriatrics, Department of Neurotec, Karolinska Institutet, KFC Plan 4, Novum, S-141 86 Huddinge, Sweden.
Neuroreport
|September 17, 2004
Summary
Phosphorylation of eukaryotic translation factor 4E (eIF4E) significantly increases in Alzheimer's disease, correlating with tau pathology. This suggests eIF4E phosphorylation is involved in neurofibrillary changes characteristic of Alzheimer's disease.
Area of Science:
- Neuroscience
- Molecular Biology
- Biochemistry
Background:
- Eukaryotic translation factor 4E (eIF4E) regulates protein translation.
- Tau protein is crucial for neuronal function and microtubule stability.
- In Alzheimer's disease, tau becomes hyperphosphorylated, leading to neurofibrillary changes.
Purpose of the Study:
- To investigate the role of eIF4E phosphorylation in Alzheimer's disease.
- To determine if eIF4E phosphorylation levels correlate with tau pathology in Alzheimer's disease.
Main Methods:
- Analysis of eIF4E phosphorylation levels in Alzheimer's disease brain samples.
- Correlation analysis between eIF4E phosphorylation and total/hyperphosphorylated tau levels.
Main Results:
- A significant increase in phosphorylated eIF4E was observed in Alzheimer's disease, particularly in late-stage neurofibrillary changes.
- eIF4E phosphorylation levels showed a significant correlation with both total tau and hyperphosphorylated tau.
Conclusions:
- Increased eIF4E phosphorylation is implicated in the pathogenesis of Alzheimer's disease.
- eIF4E phosphorylation may contribute to the formation of neurofibrillary changes in Alzheimer's disease.