Developmentally regulated expression of calcitonin gene-related peptide at mammalian neuromuscular junction

M. Matteoli, S. Balbi, C. Sala, B. Chini, M. Cimino, M. Vitadello, G. Fumagalli

Research output: Contribution to journalArticlepeer-review

Abstract

Using indirect immunofluorescence techniques, we have found that calcitonin gene-related peptide-like immunoreactivity is present in the neuromuscular junctions of somatic muscles as well as in almost all motor neurons of the lumbar enlargement of 1-week-old rats. It gradually decreases in both motor neurons and motor nerve endings as the animal grows up and completely disappears from the neuromuscular junctions in adult rats, persisting only in the motor nerve endings on the intrafusal fibers. In situ hybridization experiments have shown that the down-regulation of calcitonin generelated peptide-like immunoreactivity is strictly related to a reduction in CGRP mRNA levels in the spinal motor neurons. These results indicate that the expression of CGRP is developmentally regulated in spinal cord α motor neurons. They also suggest that the peptide may play an important role at the immature neuromuscular junction.

Original languageEnglish
Pages (from-to)175-184
Number of pages10
JournalJournal of Molecular Neuroscience
Volume2
Issue number3
DOIs
Publication statusPublished - Sep 1990

ASJC Scopus subject areas

  • Neuroscience(all)
  • Genetics
  • Biochemistry
  • Cellular and Molecular Neuroscience

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