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Quinolinic acid-immunoreactivity in the naïve mouse brain.
Yara Pujol Lopez1, Gunter Kenis1, Bart P F Rutten1
1School for Mental Health and Neuroscience (MHeNS), Department of Psychiatry and Neuropsychology, Maastricht University Medical Centre+, Maastricht, The Netherlands.
Journal of Chemical Neuroanatomy
|December 22, 2015
Summary
Quinolinic acid (QUIN) is present in the brains of healthy mice, specifically in the cingulate cortex and thalamic reticular nucleus. This neurochemical may influence motor activity in normal conditions.
Area of Science:
- Neuroscience
- Neurochemistry
- Behavioral Neuroscience
Background:
- Quinolinic acid (QUIN) is implicated in neurological and psychiatric disorders.
- Previous research focused on QUIN's neurotoxic effects and role in disease.
- Limited data exists on QUIN distribution and function in healthy brain states.
Purpose of the Study:
- To investigate the region-specific distribution of QUIN in the naïve mouse brain.
- To assess potential sex differences in QUIN expression.
- To explore the correlation between QUIN levels and affect-related behaviors.
Main Methods:
- Naïve mice underwent forced swim and open field tests to assess behavior.
- Brain tissue was analyzed for QUIN-immunoreactivity.
- QUIN-positive cells in the cingulate cortex (CC) and QUIN-immunoreactivity in the thalamic reticular nucleus (TRN) were quantified.
Main Results:
- QUIN-immunoreactivity was detected in the CC and TRN of naïve mice.
- No significant sex differences were found in QUIN levels in either region.
- A positive correlation existed between QUIN in the CC and TRN.
- In males, TRN QUIN levels strongly correlated with motor activity in the open field test.
Conclusions:
- QUIN is present in specific brain regions (CC, TRN) under normal conditions.
- QUIN may play a role in regulating motor activity in healthy individuals.
- Further research is warranted to elucidate QUIN's physiological functions.
