NDLI: Effects of Hydroxyurea Exposure on the Rat Cerebellar Neuroepithelium: an Immunohistochemical and Electron Microscopic Study Along the Anteroposterior and Mediolateral Axes

Content Provider	Springer Nature Link
Author	Rodríguez Vázquez, Lucía Martí, Joaquín
Copyright Year	2017
Abstract	We present a histological study of the cell death of cerebellar neuroepithelial neuroblasts following treatment with the cytotoxic agent hydroxyurea (HU) during the embryonic life. Pregnant rats were treated with a single dose of HU (300 mg/kg) at embryonic days 13, 14, or 15 of gestation, and their fetuses were studied from 5 to 35 h after treatment to elucidate the mechanisms of HU-induced fetotoxicity. Quantification of several parameters such as the density of pyknotic, mitotic, and PCNA-immunoreactive cells indicated that HU compromises the survival of the cerebellar neuroepithelium neuroblasts. On the other hand, our light and electron microscopic investigations during the course of prenatal development indicated that HU leads to two types of cell death: apoptosis and cells presenting cytoplasmic vacuolization, altered organelles, and a recognizable cell nucleus. Both modalities of cell death resulted in a substantial loss of cerebellar neuroepithelium cells. Current results suggest that HU exposure during gestation is toxic to the cerebellar neuroepithelium. Moreover, they allow to examine the mechanisms of HU-induced toxicity during the early development of the central nervous system. Our data also suggest that it is essential to avoid underestimating the adverse effects of HU when administered during early prenatal life.
Starting Page	671
Ending Page	682
Page Count	12
File Format	PDF
ISSN	10298428
Journal	Neurotoxicity Research
Volume Number	32
Issue Number	4
e-ISSN	14763524
Language	English
Publisher	Springer US
Publisher Date	2017-07-25
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Prenatal Hydroxyurea Cerebellar neuroepithelium Apoptosis Electron microscopy Neurosciences Neurology Neurochemistry Pharmacology/Toxicology Neurobiology Cell Biology
Content Type	Text
Resource Type	Article
Subject	Neuroscience Toxicology

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