Abnormal c-Fos Expression in TetTag Mice
Author Information
Author(s): Wilmot Jacob H., Warren Tracy L., Diniz Cassiano R. A. F., Carda Deger, Lafreniere Marrisa M., Nord Alex S., Wiltgen Brian J.
Primary Institution: University of California, Davis
Hypothesis
The study investigates the expression of immediate early genes (IEGs) in different lines of TetTag mice to understand the implications for memory encoding and retrieval.
Conclusion
The Jackson fos-tTA/fos-shEGFP mice show increased c-Fos expression without behavioral differences compared to wild-type mice, indicating a limitation in using these mice for studying neuronal activation.
Supporting Evidence
- Jackson fos-tTA/fos-shEGFP mice express more c-Fos in the hippocampus than wild-type mice.
- Other immediate early genes like Arc and Zif268 were not overexpressed in Jackson mice.
- Behavioral tests showed no differences in fear expression or memory between Jackson and wild-type mice.
Takeaway
Scientists found that a special type of mouse shows more of a brain marker than expected, but it doesn't change how they remember things.
Methodology
The study used immunohistochemistry and qPCR to compare c-Fos expression in different TetTag mouse lines.
Limitations
The overexpression of c-Fos in Jackson mice may mislead researchers using these mice for studies on neuronal activation.
Participant Demographics
62 mice (28 male and 34 female), aged 2-4 months.
Statistical Information
P-Value
p<0.0001
Statistical Significance
p<0.0001
Digital Object Identifier (DOI)
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