Pdgfra protects against ethanol-induced craniofacial defects in a zebrafish model of FASD

Neil Mccarthy, Leah Wetherill, C. Ben Lovely, Mary E. Swartz, Tatiana Foroud, Johann K. Eberhart

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

Human birth defects are highly variable and this phenotypic variability can be influenced by both the environment and genetics. However, the synergistic interactions between these two variables are not well understood. Fetal alcohol spectrum disorders (FASD) is the umbrella term used to describe the wide range of deleterious outcomes following prenatal alcohol exposure. Although FASD are caused by prenatal ethanol exposure, FASD are thought to be genetically modulated, although the genes regulating sensitivity to ethanol teratogenesis are largely unknown. To identify potential ethanol-sensitive genes, we tested five known craniofacial mutants for ethanol sensitivity: cyp26b1, gata3, pdgfra, smad5 and smoothened. We found that only platelet-derived growth factor receptor alpha (pdgfra) interacted with ethanol during zebrafish craniofacial development. Analysis of the PDGF family in a human FASD genome-wide dataset links PDGFRA to craniofacial phenotypes in FASD, prompting a mechanistic understanding of this interaction. In zebrafish, untreated pdgfra mutants have cleft palate due to defective neural crest cell migration, whereas pdgfra heterozygotes develop normally. Ethanol-exposed pdgfra mutants have profound craniofacial defects that include the loss of the palatal skeleton and hypoplasia of the pharyngeal skeleton. Furthermore, ethanol treatment revealed latent haploinsufficiency, causing palatal defects in ~62% of pdgfra heterozygotes. Neural crest apoptosis partially underlies these ethanol-induced defects in pdgfra mutants, demonstrating a protective role for Pdgfra. This protective role is mediated by the PI3K/mTOR pathway. Collectively, our results suggest a model where combined genetic and environmental inhibition of PI3K/mTOR signaling leads to variability within FASD.

Original languageEnglish
Pages (from-to)3254-3265
Number of pages12
JournalDevelopment (Cambridge)
Volume140
Issue number15
DOIs
StatePublished - Aug 1 2013

Fingerprint

Fetal Alcohol Spectrum Disorders
Platelet-Derived Growth Factor alpha Receptor
Zebrafish
Ethanol
Neural Crest
Heterozygote
Phosphatidylinositol 3-Kinases
Skeleton
Teratogenesis
Haploinsufficiency
Genetic Models
Cleft Palate
Genes
Cell Movement
Alcohols
Genome
Apoptosis
Phenotype

Keywords

  • Alcohol
  • Fas
  • mTOR
  • Pdgfra
  • Zebrafish

ASJC Scopus subject areas

  • Developmental Biology
  • Molecular Biology

Cite this

Mccarthy, N., Wetherill, L., Lovely, C. B., Swartz, M. E., Foroud, T., & Eberhart, J. K. (2013). Pdgfra protects against ethanol-induced craniofacial defects in a zebrafish model of FASD. Development (Cambridge), 140(15), 3254-3265. https://doi.org/10.1242/dev.094938

Pdgfra protects against ethanol-induced craniofacial defects in a zebrafish model of FASD. / Mccarthy, Neil; Wetherill, Leah; Lovely, C. Ben; Swartz, Mary E.; Foroud, Tatiana; Eberhart, Johann K.

In: Development (Cambridge), Vol. 140, No. 15, 01.08.2013, p. 3254-3265.

Research output: Contribution to journalArticle

Mccarthy, N, Wetherill, L, Lovely, CB, Swartz, ME, Foroud, T & Eberhart, JK 2013, 'Pdgfra protects against ethanol-induced craniofacial defects in a zebrafish model of FASD', Development (Cambridge), vol. 140, no. 15, pp. 3254-3265. https://doi.org/10.1242/dev.094938
Mccarthy, Neil ; Wetherill, Leah ; Lovely, C. Ben ; Swartz, Mary E. ; Foroud, Tatiana ; Eberhart, Johann K. / Pdgfra protects against ethanol-induced craniofacial defects in a zebrafish model of FASD. In: Development (Cambridge). 2013 ; Vol. 140, No. 15. pp. 3254-3265.
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