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Human amyloid β peptide and tau co-expression impairs behavior and causes specific gene expression changes in Caenorhabditis elegans
Wang C.; Saar V.; Leung K.L.; Chen L.; Wong G.
2018
Source PublicationNeurobiology of Disease
ISSN1095953X 09699961
Volume109Pages:88-101
Abstract

Alzheimer's disease (AD) is a progressive neurodegenerative disorder characterized by the presence of extracellular amyloid plaques consisting of Amyloid-β peptide (Aβ) aggregates and neurofibrillary tangles formed by aggregation of hyperphosphorylated microtubule-associated protein tau. We generated a novel invertebrate model of AD by crossing Aβ1–42 (strain CL2355) with either pro-aggregating tau (strain BR5270) or anti-aggregating tau (strain BR5271) pan-neuronal expressing transgenic Caenorhabditis elegans. The lifespan and progeny viability of the double transgenic strains were significantly decreased compared with wild type N2 (P < 0.0001). In addition, co-expression of these transgenes interfered with neurotransmitter signaling pathways, caused deficits in chemotaxis associative learning, increased protein aggregation visualized by Congo red staining, and increased neuronal loss. Global transcriptomic RNA-seq analysis revealed 248 up- and 805 down-regulated genes in N2 wild type versus Aβ1–42 + pro-aggregating tau animals, compared to 293 up- and 295 down-regulated genes in N2 wild type versus Aβ1–42 + anti-aggregating tau animals. Gene set enrichment analysis of Aβ1–42 + pro-aggregating tau animals uncovered up-regulated annotation clusters UDP-glucuronosyltransferase (5 genes, P < 4.2E − 4), protein phosphorylation (5 genes, P < 2.60E − 02), and aging (5 genes, P < 8.1E − 2) while the down-regulated clusters included nematode cuticle collagen (36 genes, P < 1.5E − 21). RNA interference of 13 available top up-regulated genes in Aβ1–42 + pro-aggregating tau animals revealed that F-box family genes and nep-4 could enhance life span deficits and chemotaxis deficits while Y39G8C.2 (TTBK2) could suppress these behaviors. Comparing the list of regulated genes from C. elegans to the top 60 genes related to human AD confirmed an overlap of 8 genes: patched homolog 1, PTCH1 (ptc-3), the Rab GTPase activating protein, TBC1D16 (tbc-16), the WD repeat and FYVE domain-containing protein 3, WDFY3 (wdfy-3), ADP-ribosylation factor guanine nucleotide exchange factor 2, ARFGEF2 (agef-1), Early B-cell Factor, EBF1 (unc-3), D-amino-acid oxidase, DAO (daao-1), glutamate receptor, metabotropic 1, GRM1 (mgl-2), prolyl 4-hydroxylase subunit alpha 2, P4HA2 (dpy-18 and phy-2). Taken together, our C. elegans double transgenic model provides insight on the fundamental neurobiologic processes underlying human AD and recapitulates selected transcriptomic changes observed in human AD brains.

KeywordAlzheimer's Disease Amyloid Beta Caenorhabditis Elegans Rna Interference Tau Transcriptome Analysis
DOIhttp://doi.org/10.1016/j.nbd.2017.10.003
URLView the original
Indexed BySCI
Language英语
WOS Research AreaNeurosciences & Neurology
WOS SubjectNeurosciences
WOS IDWOS:000418877600009
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Cited Times [WOS]:9   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionFaculty of Health Sciences
AffiliationUniversidade de Macau
Recommended Citation
GB/T 7714
Wang C.,Saar V.,Leung K.L.,et al. Human amyloid β peptide and tau co-expression impairs behavior and causes specific gene expression changes in Caenorhabditis elegans[J]. Neurobiology of Disease,2018,109:88-101.
APA Wang C.,Saar V.,Leung K.L.,Chen L.,&Wong G..(2018).Human amyloid β peptide and tau co-expression impairs behavior and causes specific gene expression changes in Caenorhabditis elegans.Neurobiology of Disease,109,88-101.
MLA Wang C.,et al."Human amyloid β peptide and tau co-expression impairs behavior and causes specific gene expression changes in Caenorhabditis elegans".Neurobiology of Disease 109(2018):88-101.
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