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Disrupting interaction between miR-132 and Mmp9 3'UTR improves synaptic plasticity and memory in mice
Bozena Kuzniewska1, Karolina Rejmak1, Agata Nowacka2
1Laboratory of Molecular Basis of Synaptic Plasticity, Centre of New Technologies, University of Warsaw, Warsaw, Poland.
Abstract:
As microRNAs have emerged to be important regulators of molecular events occurring at the synapses, the new questions about their regulatory effect on the behavior have araised. In the present study, we show for the first time that the dysregulated specific targeting of miR132 to Mmp9 mRNA in the mouse brain results in the increased level of Mmp9 protein, which affects synaptic plasticity and has an effect on memory formation. Our data points at the importance of complex and precise regulation of the Mmp9 level by miR132 in the brain.
Insights
MicroRNAs regulate brain function. Specific targeting of miR132 to Mmp9 mRNA in mice increases Mmp9 protein, impacting synaptic plasticity and memory formation.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- MicroRNAs (miRNAs) are key regulators of molecular processes.
- Synaptic function and behavior are influenced by miRNA activity.
- The role of specific miRNAs in memory and synaptic plasticity requires further investigation.
Purpose of the Study:
- To investigate the regulatory effect of microRNA 132 (miR132) on matrix metalloproteinase 9 (Mmp9) in the mouse brain.
- To determine the impact of miR132 dysregulation on Mmp9 levels, synaptic plasticity, and memory formation.
Main Methods:
- Analysis of miR132 targeting of Mmp9 mRNA in mouse brain.
- Quantification of Mmp9 protein levels.
- Assessment of synaptic plasticity and memory formation in mice.
Main Results:
- Dysregulated targeting of miR132 to Mmp9 mRNA leads to increased Mmp9 protein levels in the mouse brain.
- Elevated Mmp9 protein levels are associated with altered synaptic plasticity.
- These molecular changes affect memory formation processes.
Conclusions:
- miR132 plays a critical role in regulating Mmp9 levels in the brain.
- Precise regulation of Mmp9 by miR132 is essential for normal synaptic plasticity and memory.
- Dysregulation of this pathway has significant implications for cognitive function.
