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Decreased spinal cord cGMP in murine (wobbler) spontaneous lower motor neuron degeneration
Abstract:
Of the secondary messengers, cyclic quanosine monophosphate, but not cyclic adenosine monophosphate, was reduced by 80% in the cervical spinal cord and by 56% in the cerebellum of clinically affected homozygote "wobbler" mice compared to sex- and age-matched litter-mate clinically unaffected control mice. A neurotransmitter, gamma aminobutyric acid, and high-energy intermediates, adenosine triphosphate and phosphocreatine, were not significantly different in affected or unaffected mice.
Insights
Cyclic guanosine monophosphate (cGMP) levels significantly decreased in the spinal cord and cerebellum of wobbler mice. This reduction in cGMP may be linked to the neurological disorder in these mice.
Area of Science:
- Neuroscience
- Biochemistry
- Genetics
Background:
- Wobbler mice exhibit a progressive motor neuron degeneration.
- Secondary messengers play crucial roles in neuronal signaling.
- Understanding molecular changes in wobbler mice can elucidate disease mechanisms.
Purpose of the Study:
- To investigate the levels of specific secondary messengers in the central nervous system of wobbler mice.
- To compare cyclic guanosine monophosphate (cGMP) and cyclic adenosine monophosphate (cAMP) levels between affected and unaffected wobbler mice.
Main Methods:
- Quantification of cGMP and cAMP levels in the cervical spinal cord and cerebellum.
- Comparison between clinically affected homozygote wobbler mice and unaffected litter-mate controls.
Main Results:
- A significant reduction in cGMP was observed in both the cervical spinal cord (80% decrease) and cerebellum (56% decrease) of affected wobbler mice.
- No significant differences in cAMP, gamma-aminobutyric acid (GABA), adenosine triphosphate (ATP), or phosphocreatine levels were found between affected and unaffected mice.
Conclusions:
- The marked decrease in cGMP in key brain regions suggests its potential involvement in the pathogenesis of wobbler mouse syndrome.
- These findings highlight a specific biochemical alteration in wobbler mice, differentiating it from broader metabolic changes.