NDLI: The miR-15/107 Family of microRNA Genes Regulates CDK5R1/p35 with Implications for Alzheimer’s Disease Pathogenesis

Content Provider	Springer Nature Link
Author	Moncini, Silvia Lunghi, Marta Valmadre, Alice Grasso, Margherita Vescovo, Valerio Riva, Paola Denti, Michela Alessandra Venturin, Marco
Copyright Year	2016
Abstract	Cyclin-dependent kinase 5 regulatory subunit 1 (CDK5R1) encodes p35, the main activatory subunit of cyclin-dependent kinase 5 (CDK5). The p35/CDK5 active complex plays a fundamental role in brain development and functioning, but its deregulated activity has also been implicated in various neurodegenerative disorders, including Alzheimer’s disease (AD). CDK5R1 displays a large and highly evolutionarily conserved 3′-untranslated region (3′-UTR), a fact that has suggested a role for this region in the post-transcriptional control of CDK5R1 expression. Our group has recently demonstrated that two miRNAs, miR-103 and miR-107, regulate CDK5R1 expression and affect the levels of p35. MiR-103 and miR-107 belong to the miR-15/107 family, a group of evolutionarily conserved miRNAs highly expressed in human cerebral cortex. In this work, we tested the hypothesis that other members of this group of miRNAs, in addition to miR-103 and miR-107, were able to modulate CDK5R1 expression. We provide evidence that several miRNAs belonging to the miR-15/107 family regulate p35 levels. BACE1 expression levels were also found to be modulated by different members of this family. Furthermore, overexpression of these miRNAs led to reduced APP phosphorylation levels at the CDK5-specific Thr668 residue. We also show that miR-15/107 miRNAs display reduced expression levels in hippocampus and temporal cortex, but not in cerebellum, of AD brains. Moreover, increased CDK5R1 mRNA levels were observed in AD hippocampus tissues. Our results suggest that the downregulation of the miR-15/107 family might have a role in the pathogenesis of AD by increasing the levels of CDK5R1/p35 and consequently enhancing CDK5 activity.
Starting Page	4329
Ending Page	4342
Page Count	14
File Format	PDF
ISSN	08937648
Journal	Molecular Neurobiology
Volume Number	54
Issue Number	6
e-ISSN	15591182
Language	English
Publisher	Springer US
Publisher Date	2016-06-24
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	CDK5R1/p35 CDK5 miR-15/107 Post-transcriptional regulation Alzheimer’s disease Neurosciences Neurobiology Cell Biology Neurology
Content Type	Text
Resource Type	Article
Subject	Neurology Cellular and Molecular Neuroscience

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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