Human neuroepithelial cells express NMDA receptors

BMC Neurosci. 2003 Nov 13:4:28. doi: 10.1186/1471-2202-4-28.

Abstract

L-glutamate, an excitatory neurotransmitter, binds to both ionotropic and metabotropic glutamate receptors. In certain parts of the brain the BBB contains two normally impermeable barriers: 1) cerebral endothelial barrier and 2) cerebral epithelial barrier. Human cerebral endothelial cells express NMDA receptors; however, to date, human cerebral epithelial cells (neuroepithelial cells) have not been shown to express NMDA receptor message or protein. In this study, human hypothalamic sections were examined for NMDA receptors (NMDAR) expression via immunohistochemistry and murine neuroepithelial cell line (V1) were examined for NMDAR via RT-PCR and Western analysis. We found that human cerebral epithelium express protein and cultured mouse neuroepithelial cells express both mRNA and protein for the NMDA receptor. These findings may have important consequences for neuroepithelial responses during excitotoxicity and in disease.

MeSH terms

  • Animals
  • Blood-Brain Barrier / metabolism
  • Blotting, Western
  • Brain / blood supply
  • Brain / cytology
  • Brain / metabolism*
  • Cells, Cultured
  • Electrophoresis, Polyacrylamide Gel
  • Epithelial Cells / cytology
  • Epithelial Cells / metabolism*
  • Humans
  • Hypothalamus / blood supply
  • Hypothalamus / cytology
  • Hypothalamus / metabolism
  • Immunohistochemistry
  • Mice
  • RNA, Messenger / biosynthesis
  • Receptors, N-Methyl-D-Aspartate / biosynthesis*
  • Receptors, N-Methyl-D-Aspartate / genetics
  • Reverse Transcriptase Polymerase Chain Reaction

Substances

  • NMDA receptor A1
  • NR2B NMDA receptor
  • RNA, Messenger
  • Receptors, N-Methyl-D-Aspartate
  • N-methyl D-aspartate receptor subtype 2A