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Title: Disruption of a RAC1-centred network is associated with Alzheimer’s disease pathology and causes age-dependent neurodegeneration

Journal Article · · Human Molecular Genetics
DOI: https://doi.org/10.1093/hmg/ddz320 · OSTI ID:1607604
 [1];  [2];  [3];  [3];  [4];  [3];  [2];  [1]
  1. Department of Genome Informatics, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
  2. Department of Alzheimer’s Disease Research, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, Aichi 474-8511, Japan, Department of Experimental Gerontology, Graduate School of Pharmaceutical Sciences, Nagoya City University, Aichi 467-8603, Japan
  3. Department of Molecular Genetics, Brain Research Institute, Niigata University, Niigata 951-8585, Japan
  4. Department of Molecular Genetics, Brain Research Institute, Niigata University, Niigata 951-8585, Japan, Asahigawaso Medical-Welfare Center, Asahigawaso Research Institute, Okayama 703-8207, Japan

Abstract The molecular biological mechanisms of Alzheimer’s disease (AD) involve disease-associated crosstalk through many genes and include a loss of normal as well as a gain of abnormal interactions among genes. A protein domain network (PDN) is a collection of physical bindings that occur between protein domains, and the states of the PDNs in patients with AD are likely to be perturbed compared to those in normal healthy individuals. To identify PDN changes that cause neurodegeneration, we analysed the PDNs that occur among genes co-expressed in each of three brain regions at each stage of AD. Our analysis revealed that the PDNs collapsed with the progression of AD stage and identified five hub genes, including Rac1, as key players in PDN collapse. Using publicly available as well as our own gene expression data, we confirmed that the mRNA expression level of the RAC1 gene was downregulated in the entorhinal cortex (EC) of AD brains. To test the causality of these changes in neurodegeneration, we utilized Drosophila as a genetic model and found that modest knockdown of Rac1 in neurons was sufficient to cause age-dependent behavioural deficits and neurodegeneration. Finally, we identified a microRNA, hsa-miR-101-3p, as a potential regulator of RAC1 in AD brains. As the Braak neurofibrillary tangle (NFT) stage progressed, the expression levels of hsa-miR-101-3p were increased specifically in the EC. Furthermore, overexpression of hsa-miR-101-3p in the human neuronal cell line SH-SY5Y caused RAC1 downregulation. These results highlight the utility of our integrated network approach for identifying causal changes leading to neurodegeneration in AD.

Sponsoring Organization:
USDOE Office of Electricity (OE), Advanced Grid Research & Development. Power Systems Engineering Research
OSTI ID:
1607604
Alternate ID(s):
OSTI ID: 1599912
Journal Information:
Human Molecular Genetics, Journal Name: Human Molecular Genetics Vol. 29 Journal Issue: 5; ISSN 0964-6906
Publisher:
Oxford University PressCopyright Statement
Country of Publication:
United Kingdom
Language:
English
Citation Metrics:
Cited by: 21 works
Citation information provided by
Web of Science

References (75)

Altered Expression of Diabetes-Related Genes in Alzheimer's Disease Brains: The Hisayama Study journal April 2013
Neuropathological stageing of Alzheimer-related changes journal September 1991
Markers of microglia in post-mortem brain samples from patients with Alzheimer’s disease: a systematic review journal December 2017
Ineffective phagocytosis of amyloid-β by macrophages of Alzheimer's disease patients journal June 2005
The Unraveling Truth About IRE1 and MicroRNAs in Diabetes journal December 2016
A Rac1/Phosphatidylinositol 3-Kinase/Akt3 Anti-apoptotic Pathway, Triggered by AlsinLF, the Product of the ALS2 Gene, Antagonizes Cu/Zn-superoxide Dismutase (SOD1) Mutant-induced Motoneuronal Cell Death journal December 2004
Non-coding RNAs in the pathogenesis of COPD journal May 2015
Attenuated protein kinase C activity and translocation in Alzheimer's Disease brain journal May 1994
Rac1 Protein Rescues Neurite Retraction Caused by G2019S Leucine-rich Repeat Kinase 2 (LRRK2) journal March 2011
The Rac1 Polybasic Region Is Required for Interaction with Its Effector PRK1 journal November 2007
Serum microRNA miR-501-3p as a potential biomarker related to the progression of Alzheimer’s disease journal January 2017
Integrated Systems Approach Identifies Genetic Nodes and Networks in Late-Onset Alzheimer’s Disease journal April 2013
Conserved brain myelination networks are altered in Alzheimer's and other neurodegenerative diseases journal October 2017
Innate immunity in Alzheimer's disease journal February 2015
Forgetting Is Regulated through Rac Activity in Drosophila journal February 2010
Divergence of human and mouse brain transcriptome highlights Alzheimer disease pathways journal June 2010
Involvement of the γ-Secretase-Mediated EphA4 Signaling Pathway in Synaptic Pathogenesis of Alzheimer's Disease: EphA4 Signaling in Alzheimer's Disease journal April 2012
starBase v2.0: decoding miRNA-ceRNA, miRNA-ncRNA and protein–RNA interaction networks from large-scale CLIP-Seq data journal December 2013
Identification of evolutionarily conserved gene networks mediating neurodegenerative dementia journal December 2018
Age-related alteration of PKC, a key enzyme in memory processes: Physiological and pathological examples journal February 1998
Integrative network analysis of nineteen brain regions identifies molecular signatures and networks underlying selective regional vulnerability to Alzheimer’s disease journal November 2016
Rare coding variants in PLCG2, ABI3, and TREM2 implicate microglial-mediated innate immunity in Alzheimer's disease journal July 2017
Tissue specificity and the human protein interaction network journal January 2009
Regulation of phagocytosis by Rho GTPases journal April 2015
MicroRNA-101 Regulates Amyloid Precursor Protein Expression in Hippocampal Neurons journal April 2010
Endosome function and dysfunction in Alzheimer's disease and other neurodegenerative diseases journal March 2005
Crystal Structure of the Rac1−RhoGDI Complex Involved in NADPH Oxidase Activation , journal August 2001
Phosphatidylinositol 3-Kinase, Cdc42, and Rac1 Act Downstream of Ras in Integrin-Dependent Neurite Outgrowth in N1E-115 Neuroblastoma Cells journal January 2000
Variant of TREM2 Associated with the Risk of Alzheimer's Disease journal January 2013
Discovery of tissue-specific exons using comprehensive human exon microarrays journal January 2007
Incipient Alzheimer's disease: Microarray correlation analyses reveal major transcriptional and tumor suppressor responses journal February 2004
Hippocampal Activation of Rac1 Regulates the Forgetting of Object Recognition Memory journal September 2016
A central role for the small GTPase Rac1 in hippocampal plasticity and spatial learning and memory journal July 2009
Neuroinflammation in Alzheimer's disease journal April 2015
Genome-wide association study identifies variants at CLU and PICALM associated with Alzheimer's disease journal September 2009
Biomarkers of inflammation and amyloid-β phagocytosis in patients at risk of Alzheimer disease journal January 2010
Immune attack: the role of inflammation in Alzheimer disease journal May 2015
RhoA Inhibits the Nerve Growth Factor-induced Rac1 Activation through Rho-associated Kinase-dependent Pathway journal March 2001
Decreased levels of protein kinase C in Alzheimer brain journal June 1988
Potent degradation of neuronal mi RNA s induced by highly complementary targets journal February 2015
Genome-wide meta-analysis identifies new loci and functional pathways influencing Alzheimer’s disease risk journal January 2019
Exploration, normalization, and summaries of high density oligonucleotide array probe level data journal April 2003
The structural basis of Arfaptin-mediated cross-talk between Rac and Arf signalling pathways journal May 2001
INstruct: a database of high-quality 3D structurally resolved protein interactome networks journal May 2013
A Systems Level Analysis of Transcriptional Changes in Alzheimer's Disease and Normal Aging journal February 2008
C-terminal Src Kinase Gates Homeostatic Synaptic Plasticity and Regulates Fasciclin II Expression at the Drosophila Neuromuscular Junction journal February 2016
TREM2 Variants in Alzheimer's Disease journal January 2013
Altered neuronal gene expression in brain regions differentially affected by Alzheimer's disease: a reference data set journal April 2008
Prognostic serum miRNA biomarkers associated with Alzheimer’s disease shows concordance with neuropsychological and neuroimaging assessment journal October 2014
Spatio-temporal transcriptome of the human brain journal October 2011
The Small GTPase RAC1/CED-10 Is Essential in Maintaining Dopaminergic Neuron Function and Survival Against α-Synuclein-Induced Toxicity journal February 2018
MicroRNA-101 downregulates Alzheimer’s amyloid-β precursor protein levels in human cell cultures and is differentially expressed journal January 2011
Metazoan MicroRNAs journal March 2018
The NHGRI GWAS Catalog, a curated resource of SNP-trait associations journal December 2013
Genome-wide association study identifies variants at CLU and CR1 associated with Alzheimer's disease journal September 2009
A systematic integrated analysis of brain expression profiles reveals YAP1 and other prioritized hub genes as important upstream regulators in Alzheimer's disease journal September 2017
Labelling and optical erasure of synaptic memory traces in the motor cortex journal September 2015
Dissecting the pathological effects of human A 40 and A 42 in Drosophila: A potential model for Alzheimer's disease journal April 2004
Transcriptional Alterations Related to Neuropathology and Clinical Manifestation of Alzheimer’s Disease journal November 2012
A Unique Microglia Type Associated with Restricting Development of Alzheimer’s Disease journal June 2017
MicroRNA-101 Targets MAPK Phosphatase-1 To Regulate the Activation of MAPKs in Macrophages journal November 2010
Variations in the transcriptome of Alzheimer's disease reveal molecular networks involved in cardiovascular diseases journal January 2008
Rac1 plays an essential role in axon growth and guidance and in neuronal survival in the central and peripheral nervous systems journal September 2015
ITIM-dependent endocytosis of CD33-related Siglecs: role of intracellular domain, tyrosine phosphorylation, and the tyrosine phosphatases, Shp1 and Shp2 journal October 2007
Meta-analysis of 74,046 individuals identifies 11 new susceptibility loci for Alzheimer's disease journal October 2013
Aβ42 Mutants with Different Aggregation Profiles Induce Distinct Pathologies in Drosophila journal February 2008
Synaptic genes are extensively downregulated across multiple brain regions in normal human aging and Alzheimer's disease journal June 2013
Structural Basis of Guanine Nucleotide Exchange Mediated by the T-Cell Essential Vav1 journal July 2008
Temporal Tracking of Microglia Activation in Neurodegeneration at Single-Cell Resolution journal October 2017
Metascape provides a biologist-oriented resource for the analysis of systems-level datasets journal April 2019
Protein interaction network of alternatively spliced isoforms from brain links genetic risk factors for autism journal April 2014
Identification of Unstable Network Modules Reveals Disease Modules Associated with the Progression of Alzheimer’s Disease journal November 2013
Control of Excitatory Synaptic Transmission by C-terminal Src Kinase journal April 2008
The DH and PH Domains of Trio Coordinately Engage Rho GTPases for their Efficient Activation journal May 2007
Implication of the Immune System in Alzheimer's Disease: Evidence from Genome-Wide Pathway Analysis journal June 2010

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