Leukaemia inhibitory factor is retrogradely transported by a distinct population of adult rat sensory neurons: co-localization with trkA and other neurochemical markers

Stephen W.N. Thompson, Ann B. Vernallis, John K. Heath, John V. Priestley

Research output: Contribution to journalArticlepeer-review

Abstract

Sciatic sensory afferents that retrogradely transport and accumulate leukaemia inhibitory factor (LIF) within their soma were characterized in the adult rat in vivo. Twenty-four percent of neurons within the L4 and L5 dorsal root ganglia accumulated biotinylated LIF following intraneural injection of the cytokine into the sciatic nerve. Labelled cell bodies were predominantly of small diameter (20.1 +/- 0.5 microm). Retrograde transport was eliminated by excess unlabelled LIF but not by the related cytokines, ciliary-derived neurotrophic factor (CNTF) and interleukin-6 (IL-6). Double labelling revealed that the majority (81%) of LIF-accumulating neurons were immunopositive for CGRP and 34% were immunopositive for the cell surface glycoconjugate IB4. Sixty-two percent of LIF-accumulating neurons were immunopositive for trkA. Our results demonstrate a group of small-diameter sensory neurons that retrogradely transport LIF, comprising cells that constitutively express neuropeptides and those likely to be peptide-deficient. LIF-accumulating neurons expressing trkA are also potentially responsive to nerve growth factor. It is likely that the LIF-accumulating neurons described in this study are nociceptive in function.
Original languageEnglish
Pages (from-to)1244-1251
Number of pages8
JournalEuropean Journal of Neuroscience
Volume9
Issue number6
DOIs
Publication statusPublished - Jun 1997

Keywords

  • Animals
  • Biological Markers
  • Biological Transport, Active
  • Biotin
  • Carrier Proteins
  • Growth Inhibitors
  • Immunohistochemistry
  • Interleukin-6
  • Leukemia Inhibitory Factor
  • Lymphokines
  • Male
  • Membrane Proteins
  • Neurons, Afferent
  • Rats
  • Receptor, trkA
  • Receptors, Nerve Growth Factor
  • Sciatic Nerve

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