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Effects of vasoactive intestinal peptide and galanin on survival of cultured porcine myenteric neurons

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Author

Summary, in English

Enteric neuronal plasticity is probably fundamental in order to withstand injury or changes in intestinal activity. The role of the neuropeptides in neuroprotection is still enigmatic. The expression of galanin and vasoactive intestinal peptide (VIP) and the effects of the two peptides on survival of small intestinal porcine myenteric neurons cultured for 6 days were studied. Immunocytochemistry and cell counting were used to evaluate the numbers of surviving neurons and their expression of galanin and VIP. To reflect the in vivo situation, cryostat sections of porcine mid-jejunum were used. A concentration-dependent and marked increase in neuronal survival was noted when neurons were grown in the presence of VIP (10(-8) - 10(-6) M), whereas addition of galanin (10(-8) - 10(-6) M) slightly decreased neuronal survival. A dramatic increase in the proportions of myenteric neurons containing VIP or galanin immunoreactivity occurred during culturing. The presence of VIP further increased the number of galanin-expressing neurons. A majority of the galanin-immunoreactive neurons lacked VIP, while all VIP-immunoreactive neurons contained galanin. In conclusion, culturing porcine myenteric neurons in the presence of VIP increases, while the presence of galanin reduces, survival. Culturing significantly increased the proportion of neurons expressing VIP and/or galanin; the presence of VIP further increased the number of galanin-expressing neurons.

Department/s

  • Neurogastroenterology

Publishing year

2005

Language

English

Pages

185-192

Publication/Series

Regulatory Peptides

Volume

125

Issue

1-3

Document type

Journal article

Publisher

Elsevier

Topic

  • Cell and Molecular Biology

Keywords

  • cell culture
  • enteric nervous system
  • neuronal plasticity
  • survival
  • neuronal
  • neuropeptide expression

Status

Published

Research group

  • Neurogastroenterology

ISBN/ISSN/Other

  • ISSN: 1873-1686