Changes in GABAA Receptor Subunit Expression During Purkinje Cell Degeneration in Lurcher Mice
Author Information
Author(s): Linnemann C, Schmeh I, Thier P, Schwarz C
Primary Institution: Department of Cognitive Neurology, Hertie-Institute for Clinical Brain Research, University of Tübingen
Hypothesis
Does the GABAA receptor subunit composition change in the deep cerebellar nuclei during Purkinje cell degeneration in Lurcher mice?
Conclusion
The down-regulation of γ2 subunits may reflect an initial adaptive response to Purkinje cell loss, but it is transient and does not explain the long-term functional benefits observed in Lurcher mice.
Supporting Evidence
- The γ2 subunit mRNA expression was significantly reduced in Lurcher mice at postnatal day 14 compared to wild type.
- The down-regulation of γ2 subunits was not observed in the hippocampus or forebrain.
- The transient nature of the γ2 down-regulation suggests it is not responsible for the long-term benefits seen in Lurcher mice.
Takeaway
When certain brain cells die in Lurcher mice, the levels of a specific protein change for a little while, but then go back to normal as the mice grow up.
Methodology
Real-time RT-PCR was used to assess GABAA receptor subunit gene expression in deep cerebellar nuclei tissue from Lurcher mice and wild type controls at different ages.
Limitations
The study focused only on specific subunits and did not explore other potential changes in GABAA receptor composition.
Participant Demographics
Lurcher mice and wild type controls, aged postnatal day 11, 14, and 8 weeks.
Statistical Information
P-Value
0.036
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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