http://link.springer.com/article/10.1007/s11481-016-9693-6
Abstract
This study underlines
the importance of cinnamon, a commonly used natural spice and flavoring
material, and its metabolite sodium benzoate (NaB) in converting poor
learning mice to good learning ones. NaB, but not sodium formate, was
found to upregulate plasticity-related molecules, stimulate NMDA- and
AMPA-sensitive calcium influx and increase of spine density in cultured
hippocampal neurons. NaB induced the activation of CREB in hippocampal
neurons via protein kinase A (PKA), which was responsible for the
upregulation of plasticity-related molecules. Finally, spatial memory
consolidation-induced activation of CREB and expression of different
plasticity-related molecules were less in the hippocampus of poor
learning mice as compared to good learning ones. However, oral treatment
of cinnamon and NaB increased spatial memory consolidation-induced
activation of CREB and expression of plasticity-related molecules in the
hippocampus of poor-learning mice and converted poor learners into good
learners. These results describe a novel property of cinnamon in
switching poor learners to good learners via stimulating hippocampal
plasticity.
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