» Articles » PMID: 31997075

Selected MicroRNAs Increase Synaptic Resilience to the Damaging Binding of the Alzheimer's Disease Amyloid Beta Oligomers

Overview
Journal Mol Neurobiol
Date 2020 Jan 31
PMID 31997075
Citations 15
Authors
Affiliations
Soon will be listed here.
Abstract

Alzheimer's disease (AD) is marked by synaptic loss (at early stages) and neuronal death (at late stages). Amyloid beta (Aβ) and tau oligomers can target and disrupt synapses thus driving cognitive decay. Non-demented individuals with Alzheimer's neuropathology (NDAN) are capable of withstanding Aβ and tau toxicity, thus remaining cognitively intact despite presence of AD neuropathology. Understanding the involved mechanism(s) would lead to development of novel effective therapeutic strategies aimed at promoting synaptic resilience to amyloid toxicity. NDAN have a unique hippocampal post-synaptic proteome when compared with AD and control individuals. Potential upstream modulators of such unique proteomic profile are miRNA-485, miRNA-4723 and miRNA-149, which we found differentially expressed in AD and NDAN vs. control. We thus hypothesized that these miRNAs play an important role in promoting either synaptic resistance or sensitization to Aβ oligomer binding. Using an in vivo mouse model, we found that administration of these miRNAs affected key synaptic genes and significantly decreased Aβ binding to the synapses. Our findings suggest that miRNA regulation and homeostasis are crucial for Aβ interaction with synaptic terminals and support that a unique miRNA regulation could be driving synaptic resistance to Aβ toxicity in NDAN, thus contributing to their preserved cognitive abilities.

Citing Articles

Amyloid-β oligomers increase the binding and internalization of tau oligomers in human synapses.

Kadamangudi S, Marcatti M, Zhang W, Fracassi A, Kayed R, Limon A Acta Neuropathol. 2024; 149(1):2.

PMID: 39688618 PMC: 11652575. DOI: 10.1007/s00401-024-02839-2.


The concept of resilience to Alzheimer's Disease: current definitions and cellular and molecular mechanisms.

de Vries L, Huitinga I, Kessels H, Swaab D, Verhaagen J Mol Neurodegener. 2024; 19(1):33.

PMID: 38589893 PMC: 11003087. DOI: 10.1186/s13024-024-00719-7.


Synaptosome microRNAs regulate synapse functions in Alzheimer's disease.

Kumar S, Orlov E, Gowda P, Bose C, Swerdlow R, Lahiri D NPJ Genom Med. 2022; 7(1):47.

PMID: 35941185 PMC: 9359989. DOI: 10.1038/s41525-022-00319-8.


TREM2-induced activation of microglia contributes to synaptic integrity in cognitively intact aged individuals with Alzheimer's neuropathology.

Fracassi A, Marcatti M, Tumurbaatar B, Woltjer R, Moreno S, Taglialatela G Brain Pathol. 2022; 33(1):e13108.

PMID: 35816404 PMC: 9836373. DOI: 10.1111/bpa.13108.


Epigenetics in Alzheimer's Disease.

Gao X, Chen Q, Yao H, Tan J, Liu Z, Zhou Y Front Aging Neurosci. 2022; 14:911635.

PMID: 35813941 PMC: 9260511. DOI: 10.3389/fnagi.2022.911635.


References
1.
Vandenberghe R . The relationship between amyloid deposition, neurodegeneration, and cognitive decline in dementia. Curr Neurol Neurosci Rep. 2014; 14(11):498. DOI: 10.1007/s11910-014-0498-9. View

2.
Selkoe D . Alzheimer's disease is a synaptic failure. Science. 2002; 298(5594):789-91. DOI: 10.1126/science.1074069. View

3.
Yaari R, Corey-Bloom J . Alzheimer's disease. Semin Neurol. 2007; 27(1):32-41. DOI: 10.1055/s-2006-956753. View

4.
Henstridge C, Pickett E, Spires-Jones T . Synaptic pathology: A shared mechanism in neurological disease. Ageing Res Rev. 2016; 28:72-84. DOI: 10.1016/j.arr.2016.04.005. View

5.
Sengupta U, Nilson A, Kayed R . The Role of Amyloid-β Oligomers in Toxicity, Propagation, and Immunotherapy. EBioMedicine. 2016; 6:42-49. PMC: 4856795. DOI: 10.1016/j.ebiom.2016.03.035. View