Prenatal exposure to thalidomide, altered vasculogenesis, and CNS malformations

K L Hallene, E Oby, B J Lee, S Santaguida, S Bassanini, M Cipolla, N Marchi, M Hossain, G Battaglia, D Janigro

Research output: Contribution to journalArticle

49 Scopus citations

Abstract

Malformations of cortical development (MCD) result from abnormal neuronal positioning during corticogenesis. MCD are believed to be the morphological and perhaps physiological bases of several neurological diseases, spanning from mental retardation to autism and epilepsy. In view of the fact that during development, an appropriate blood supply is necessary to drive organogenesis in other organs, we hypothesized that vasculogenesis plays an important role in brain development and that E15 exposure in rats to the angiogenesis inhibitor thalidomide would cause postnatal MCD. Our results demonstrate that thalidomide inhibits angiogenesis in vitro at concentrations that result in significant morphological alterations in cortical and hippocampal regions of rats prenatally exposed to this vasculotoxin. Abnormal neuronal development was associated with vascular malformations and a leaky blood-brain barrier. Protein extravasation and uptake of fluorescent albumin by neurons, but not glia, was commonly associated with abnormal cortical development. Neuronal hyperexcitability was also a hallmark of these abnormal cortical regions. Our results suggest that prenatal vasculogenesis is required to support normal neuronal migration and maturation. Altering this process leads to failure of normal cerebrovascular development and may have a profound implication for CNS maturation.

Original languageEnglish (US)
Pages (from-to)267-83
Number of pages17
JournalNeuroscience
Volume142
Issue number1
DOIs
StatePublished - Sep 29 2006

Keywords

  • Action Potentials/drug effects
  • Animals
  • Animals, Newborn
  • Aorta/cytology
  • Blotting, Western/methods
  • Cattle
  • Central Nervous System/drug effects
  • Dose-Response Relationship, Drug
  • Endothelial Cells/drug effects
  • Female
  • Immunohistochemistry/methods
  • In Vitro Techniques
  • Male
  • Microtubule-Associated Proteins/metabolism
  • Neovascularization, Physiologic/drug effects
  • Nervous System Malformations/etiology
  • Neurons/drug effects
  • Neuropeptides/metabolism
  • Phosphopyruvate Hydratase/metabolism
  • Pregnancy
  • Prenatal Exposure Delayed Effects/chemically induced
  • Rats
  • Rats, Sprague-Dawley
  • Teratogens/toxicity
  • Thalidomide/toxicity

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