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Published on: September 18, 2011
Spinal cord motoneurons express p75NGFR and p145trkB mRNA in amyotrophic lateral sclerosis
J L Seeburger1, S Tarras, H Natter
1Department of Neurology, Hahnemann University, Philadelphia, PA 19102-1192.
Abstract:
In the present study, in situ hybridization was used to examine the expression of nerve growth factor (NGF) receptor (p75NGFR), trk (p140trk) and trkB (p145trkB) mRNA in spinal cord sections from patients with amyotrophic lateral sclerosis (ALS). We report that the expression of p75NGFR and p145trkB mRNA is elevated in alpha motoneurons in ALS sections. However, p140trk mRNA was not expressed in either ALS or control sections.
Insights
Researchers studied nerve growth factor (NGF) receptor mRNA in spinal cords of patients with amyotrophic lateral sclerosis (ALS). They found elevated expression of p75NGFR and p145trkB in alpha motoneurons, suggesting a role in ALS pathogenesis.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease.
- Understanding molecular changes in ALS is crucial for developing treatments.
- Nerve growth factor (NGF) receptors play roles in neuronal survival and function.
Purpose of the Study:
- To investigate the expression of nerve growth factor (NGF) receptor (p75NGFR), trk (p140trk), and trkB (p145trkB) mRNA in spinal cord sections from ALS patients.
- To determine if these receptor expressions are altered in alpha motoneurons affected by ALS.
Main Methods:
- In situ hybridization was employed to detect and quantify specific mRNA expression.
- Spinal cord sections from both ALS patients and control individuals were analyzed.
- Focus was placed on alpha motoneurons within the spinal cord.
Main Results:
- A significant elevation in the expression of p75NGFR mRNA was observed in alpha motoneurons of ALS spinal cord sections.
- Similarly, p145trkB mRNA expression was found to be upregulated in the affected alpha motoneurons in ALS.
- No expression of p140trk mRNA was detected in either ALS or control spinal cord sections.
Conclusions:
- The findings indicate an upregulation of p75NGFR and trkB signaling pathways in the alpha motoneurons of ALS patients.
- The lack of p140trk expression suggests a specific involvement of trkB in the disease process.
- These altered receptor expressions may represent potential therapeutic targets for ALS intervention.
