Lab Anim Res.  2019 Dec;35(4):172-179. 10.1186/s42826-019-0026-9.

Identification of proteins differentially expressed by glutamate treatment in cerebral cortex of neonatal rats

Affiliations
  • 1Department of Anatomy, College of Veterinary Medicine, Research Institute of Life Science, Gyeongsang National University, 501 Jinju-daero, Jinju 52828, South Korea. pokoh@gnu.ac.kr

Abstract

Glutamate leads to neuronal cell damage by generating neurotoxicity during brain development. The objective of this study is to identify proteins that differently expressed by glutamate treatment in neonatal cerebral cortex. Sprague-Dawley rat pups (post-natal day 7) were intraperitoneally injected with vehicle or glutamate (10 mg/kg). Brain tissues were isolated 4 h after drug treatment and fixed for morphological study. Moreover, cerebral cortices were collected for protein study. Two-dimensional gel electrophoresis and mass spectrometry were carried out to identify specific proteins. We observed severe histopathological changes in glutamate-exposed cerebral cortex. We identified various proteins that differentially expressed by glutamate exposure. Identified proteins were thioredoxin, peroxiredoxin 5, ubiquitin carboxy-terminal hydrolase L1, proteasome subunit alpha proteins, isocitrate dehydrogenase, and heat shock protein 60. Heat shock protein 60 was increased in glutamate exposed condition. However, other proteins were decreased in glutamate-treated animals. These proteins are related to anti-oxidant, protein degradation, metabolism, signal transduction, and anti-apoptotic function. Thus, our findings can suggest that glutamate leads to neonatal cerebral cortex damage by regulation of specific proteins that mediated with various functions.

Keyword

Cerebral cortex; Glutamate; Neonate; Proteomics

MeSH Terms

Animals
Brain
Cerebral Cortex*
Chaperonin 60
Electrophoresis, Gel, Two-Dimensional
Glutamic Acid*
Humans
Infant, Newborn
Isocitrate Dehydrogenase
Mass Spectrometry
Metabolism
Neurons
Peroxiredoxins
Proteasome Endopeptidase Complex
Proteolysis
Proteomics
Rats*
Rats, Sprague-Dawley
Signal Transduction
Thioredoxins
Ubiquitin Thiolesterase
Chaperonin 60
Glutamic Acid
Isocitrate Dehydrogenase
Peroxiredoxins
Proteasome Endopeptidase Complex
Thioredoxins
Ubiquitin Thiolesterase
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