PUBLICATION

Embryonic exposure to 10 μg L(-1) lead results in female-specific expression changes in genes associated with nervous system development and function and Alzheimer's disease in aged adult zebrafish brain

Authors
Lee, J., Freeman, J.L.
ID
ZDB-PUB-160119-8
Date
2016
Source
Metallomics : integrated biometal science   8(6): 589-96 (Journal)
Registered Authors
Freeman, Jennifer
Keywords
none
Datasets
GEO:GSE74038, GEO:GSE74037
MeSH Terms
  • Alzheimer Disease/etiology*
  • Alzheimer Disease/pathology
  • Animals
  • Brain/drug effects
  • Brain/metabolism*
  • Embryo, Nonmammalian/drug effects
  • Embryo, Nonmammalian/metabolism*
  • Embryo, Nonmammalian/pathology
  • Female
  • Gene Expression Profiling
  • Gene Expression Regulation, Developmental*
  • Lead/toxicity*
  • Male
  • Nerve Tissue Proteins/genetics*
  • Zebrafish/genetics*
  • Zebrafish/growth & development
PubMed
26776728 Full text @ Metallomics
Abstract
A developmental lead (Pb) exposure has been proposed as an environmental risk factor for adult neurodegenerative diseases including Alzheimer's disease (AD). Recent animal studies showed pathological characteristics of AD in adults with a developmental Pb exposure, but additional studies are needed to investigate this phenomenon. To further assess the relationship between an embryonic Pb exposure and latent neurological alterations, the brain of adult female and male zebrafish aged 12 months that were exposed to a control treatment or 10 μg L(-1) Pb only during embryogenesis (1-72 hours after fertilization) were analyzed on a zebrafish-specific microarray platform. Gene ontology and pathway analysis revealed similarities in the top disease and functional categories in both sexes, but females had 4.3 times more genes altered than males. In addition, alterations in genes associated with nervous system development and function were more pronounced with a set of 89 genes associated with AD including amyloid precursor protein (APP), apolipoprotein (APOE), and sortlin-related receptor precursor (SORL1) observed to be changed in adult females. Our observations suggest that an embryonic exposure to Pb at levels as low as 10 μg L(-1) disturb global gene expression patterns in a sex-specific manner that could lead to neurological alterations in later life. With these findings, future studies investigating the adverse neurological outcomes of these changes in gene expression will facilitate our understanding of the impact of an embryonic 10 μg L(-1) Pb exposure on neurological disease pathogenesis and the inclusion of additional concentrations will broaden our knowledge of dose-dependent changes.
Genes / Markers
Figures
Show all Figures
Expression
Phenotype
Mutation and Transgenics
Human Disease / Model Data
Sequence Targeting Reagents
Fish
Antibodies
Orthology
Engineered Foreign Genes
Mapping
Errata and Notes