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miR-135a-5p mediates memory and synaptic impairments via the Rock2/Adducin1 signaling pathway in a mouse model of Alzheimer’s disease
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miR-135a-5p mediates memory and synaptic impairments via the Rock2/Adducin1 signaling pathway in a mouse model of Alzheimer’s disease
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miR-135a-5p mediates memory and synaptic impairments via the Rock2/Adducin1 signaling pathway in a mouse model of Alzheimer’s disease
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Journal Article
miR-135a-5p mediates memory and synaptic impairments via the Rock2/Adducin1 signaling pathway in a mouse model of Alzheimer’s disease
2021
Overview
Aberrant regulation of microRNAs (miRNAs) has been implicated in the pathogenesis of Alzheimer’s disease (AD), but most abnormally expressed miRNAs found in AD are not regulated by synaptic activity. Here we report that dysfunction of miR-135a-5p/Rock2/Add1 results in memory/synaptic disorder in a mouse model of AD. miR-135a-5p levels are significantly reduced in excitatory hippocampal neurons of AD model mice. This decrease is tau dependent and mediated by Foxd3. Inhibition of miR-135a-5p leads to synaptic disorder and memory impairments. Furthermore, excess Rock2 levels caused by loss of miR-135a-5p plays an important role in the synaptic disorder of AD via phosphorylation of Ser726 on adducin 1 (Add1). Blocking the phosphorylation of Ser726 on Add1 with a membrane-permeable peptide effectively rescues the memory impairments in AD mice. Taken together, these findings demonstrate that synaptic-related miR-135a-5p mediates synaptic/memory deficits in AD via the Rock2/Add1 signaling pathway, illuminating a potential therapeutic strategy for AD.
Several micro RNAs have been shown to be deregulated in brain tissue or sera from individuals with Alzheimer’s disease and in AD mouse models. The authors show that miR-135a-5p is downregulated in excitatory pyramidal neurons from AD mice and that dysfunction of miR-135a-5p/Rock2/Add1 results in memory/synaptic disorder in AD.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 38/32
/ 38/77
/ 9/30
/ Adducin
/ Alzheimer Disease - genetics
/ Alzheimer Disease - metabolism
/ Alzheimer Disease - physiopathology
/ Animals
/ Cytoskeletal Proteins - genetics
/ Cytoskeletal Proteins - metabolism
/ Humanities and Social Sciences
/ Kinases
/ Male
/ Memory Disorders - metabolism
/ Memory Disorders - physiopathology
/ Mice
/ miRNA
/ Neurons
/ rho-Associated Kinases - genetics
/ rho-Associated Kinases - metabolism
/ Science
/ Signal Transduction - genetics
