Inner perineurial cell vulnerability in ischemia

Timothy J. Benstead, Peter J. Dyck, Virgilio Sangalang

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

The perineurium of peripheral nerve plays important roles in anatomical organization of fibers groups in endoneurial fluid homeostasis and in maintenance of tensile strength but little is known about the functional and structural alterations of the perineurium with injury. Large arteries of supply to lower limb of Sprague-Dawley rats were ligated to study the structural reactions of perineurium at 36 h and at 7 days after induction of ischemic injury. Lipid droplets were found to be an early reactive change to ischemia in multiple cell types including perineurial, endothelial and Schwann cells. In peripheral nerve levels showing early myelinated fiber injury the inner perineurial sheath was widened and was undergoing degeneration. The inner layers of perineurial cells showed swelling, organelle disruption and membrane dissolution while outer layers remained intact. Inner perineurial cell degeneration is a prominent early feature of ischemic injury and may be an important mechanism of altered endoneurial homeostasis, fiber function and structure.

Original languageEnglish (US)
Pages (from-to)177-181
Number of pages5
JournalBrain Research
Volume489
Issue number1
DOIs
StatePublished - Jun 5 1989

Keywords

  • Cell death
  • Ischemic neuropathy
  • Lipid droplet
  • Morphometry
  • Perineurium
  • Peripheral nerve

ASJC Scopus subject areas

  • Neuroscience(all)
  • Molecular Biology
  • Clinical Neurology
  • Developmental Biology

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