Peripheral Nervous System Effects in Sandhoff Disease Mice
Author Information
Author(s): Melanie A McNally, Rena C Baek, Robin L Avila, Thomas N Seyfried, Gary R Strichartz, Daniel A Kirschner
Primary Institution: Boston College
Hypothesis
If the lipid composition of the neuronal or myelin membranes in the PNS was altered due to faulty catabolism of GM2, then changes in the myelin and in nerve electrophysiology would be observed.
Conclusion
The study found no significant abnormalities in the peripheral nervous system of Sandhoff disease mice, but highlighted the importance of using multiple techniques to assess myelin structure and function.
Supporting Evidence
- Electrophysiological measurements showed no significant differences in nerve conduction velocity between Hexb+/- and Hexb-/- mice.
- X-ray diffraction revealed normal myelin structure in the peripheral nerves of Hexb-/- mice.
- GM2 ganglioside was present in the sciatic nerves of Hexb-/- mice but not in Hexb+/- mice.
Takeaway
Researchers looked at mice with Sandhoff disease to see if their nerves were working properly. They found that the nerves were mostly okay, but there were some changes in the fat molecules that help protect the nerves.
Methodology
The study used electrophysiological methods, low-angle x-ray diffraction, and lipid analysis to evaluate the peripheral nervous system in Sandhoff disease mice.
Limitations
The study did not analyze optic nerve tissue and focused only on sciatic nerves, which may not represent all aspects of peripheral nervous system involvement.
Participant Demographics
Mice used were transgenic Sandhoff mice (Hexb-/-) and heterozygous controls (Hexb+/-).
Statistical Information
P-Value
p<0.05
Confidence Interval
95%
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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