Repository of Research and Investigative Information

Repository of Research and Investigative Information

Baqiyatallah University of Medical Sciences

Paraoxon-induced ultrastructural growth changes of rat cultured hippocampal cells in neurobasal/B27

(2006) Paraoxon-induced ultrastructural growth changes of rat cultured hippocampal cells in neurobasal/B27. Toxicology. pp. 221-227. ISSN 0300-483X

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Abstract

Organophosphates (OPs) neurotoxicity is attributed both to their well-known cholinergic and recently attended non-cholinergic effects. Since parathion has been observed to be responsible for more cases of poisoning than any other OP insecticides, it is vitally important to investigate other mechanisms, besides cholinesterase inhibition, which can potentially contribute to the neurotoxicity of parathion (or its metabolite, paraoxon). In present study, hippocampal cells obtained from Wistar rat neonates were cultured in neurobasal medium supplemented with B27 serum where different doses of paraoxon were also introduced. The neuronal growth in the control group and those exposed to paraoxon was compared. Phase contrast microscopy, cell staining (Neutral Red) and computer assessment morphometric study (Motic) were used to study cell morphology, viability and type of cell death. Statistical analysis was carried out using one-way ANOVA. There was no clear morphologic differences between neurons in the control group and those exposed to 10 mu M paraox: however, deformity of the soma was clear in pellets containing higher concentration of paraoxon. Ultrastructure of cells was markedly altered at 50 mu M dose of paraoxon as evidenced by gradual discontinuation of cytoplasm, appearing of numerous vacuoles and intracytoplasmic myelin figure. The processes (neurites) did not grow in media containing 100 mu M paraoxon or more. Viability decreased with increasing paraoxon especially above 100 mu M. In conclusion, the present data reveal that paraoxon, in 30 mu M or higher concentrations, induces a decrease in cell growth, followed by cell swelling and neuronal death (possibly necrosis). (c) 2005 Elsevier Ireland Ltd. All rights reserved.

Item Type: Article
Keywords: cell culture hippocampus paraoxon neurobasal/B27 necrosis neurons apoptosis neuropathology mechanisms polarity Pharmacology & Pharmacy Toxicology
Divisions:
Page Range: pp. 221-227
Journal or Publication Title: Toxicology
Journal Index: ISI
Volume: 217
Number: 2-3
Identification Number: https://doi.org/10.1016/j.tox.2005.09.018
ISSN: 0300-483X
Depositing User: مهندس مهدی شریفی
URI: http://eprints.bmsu.ac.ir/id/eprint/7234

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