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Acta Neuropathologica

, Volume 65, Issue 3–4, pp 247–254 | Cite as

Tracer study on a paracellular route in experimental hydrocephalus

  • Y. Nakagawa
  • J. Cervós-Navarro
  • J. Artigas
Original Works

Summary

Considering the possibility of a paracellular pathway for edema resoltuion, we studied the intracerebral movement of proteins and ionic lanthanum in rats with experimental hydrocephalus. Hydrocephalus was induced by injection of kaolin suspension into the cisterna magna. After induction of hydrocephalus, horseradish peroxidase (HRP), microperoxidase (MP), or lanthanum chloride (LaCl3) were perfused into the ventricle system. HRP and MP were localized mainly in the intercellular spaces between ependymal cells, glial cells, and in perivascular spaces and were restricted by endothelial tight junctions. Ionic lanthanum (La3+), however, penetrated these tight junctions and moved between the blood and CSF cavities by paracellular pathways. These findings indicate that in obstructive hydrocephalus, the tight junctions may constitute part of a paracellular pathway for the transendothelial movement of small solutes, although they prevent the movement of larger molecules.

Key words

Hydrocephalus Blood brain barrier Tight junction Paracellular pathway Ionic lanthanum 

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Copyright information

© Springer-Verlag 1985

Authors and Affiliations

  • Y. Nakagawa
    • 1
  • J. Cervós-Navarro
    • 1
  • J. Artigas
    • 1
  1. 1.Institute of NeuropathologyFree University of BerlinBerlin 45

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