An electrophysiological study on the autonomic innervation of the mesenteric lymph node in the rat.
Splanchnic innervation of the mesenteric lymph node was studied by means of electrophysiological technique in the rat. The effect of intravenous (i.v.) injection of recombinant human interleukin-1beta (rhIL-1beta) on the activity of efferent nerve fibers innervating the mesenteric lymph node was observed in the urethane anesthetized rat. An i.v. injection of 10 ng rhIL-1beta caused a gradual increase in efferent activity which lasted longer than 90 min. Dose related responses were observed at doses of 1, 10 and 100 ng. The least effective dose was about 10 ng. The conduction velocities estimated in mesenteric nerve fibers to the lymph node distributed in the range of 1.9-0.9 m/s, and the mean velocity was 1.39+/-0.34 m/s (n = 5). These observations implicate the involvement in the neural modulation of immune function of the mesenteric lymph node.
Niijima
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A
Department of Physiology, Niigata University School of Medicine, Japan.
D000200:Action Potentials / Q000502:physiology; D000818:Animals; D001341:Autonomic Nervous System / Q000276:immunology*; D004305:Dose-Response Relationship, Drug; D005071:Evoked Potentials / Q000502:physiology; D007375:Interleukin-1 / Q000494:pharmacology; D008198:Lymph Nodes / Q000294:innervation*; D008297:Male; D009431:Neural Conduction / Q000502:physiology; D009476:Neurons, Efferent / Q000187:drug effects / Q000502:physiology; D051381:Rats; D017208:Rats, Wistar; D011994:Recombinant Proteins / Q000494:pharmacology; D013153:Splanchnic Nerves / Q000166:cytology / Q000502:physiology*
D007375:Interleukin-1; D011994:Recombinant Proteins