S-100B but not NGF, EGF, insulin or calmodulin is a CNS serotonergic growth factor

E. C. Azmitia, K. Dolan, P. M. Whitaker-Azmitia

Research output: Contribution to journalArticlepeer-review


The effects of S-100B, nerve growth factor (NGF), epidermal growth factor (EGF) and insulin were tested in cultured mesencephalic neurons. Only chronic S-100B showed enhancement (maximal at 3.2 ng/ml is 171%) after 3 days of incubation of the [3H]5-HT uptake capacity by serotonergic neurons. A single application at initial plating of S-100B (maximal at 5 ng/ml is 185%), but not calmodulin, increased the development of the [3H]5-HT uptake capacity by the cultured serotonergic neurons. Morphometric analysis of cultured 5-HT immunoreactive (IR) neurons showed an increase (135 and 147%) in neurite length 30 h after S-100B application of 16 and 3.2 ng/ml (respectively). These results suggest that S-100B is a serotonergic growth factor in the mammalian brain.

Original languageEnglish (US)
Pages (from-to)354-356
Number of pages3
JournalBrain Research
Issue number2
StatePublished - May 21 1990


  • Calmodulin
  • Cell culture
  • Epidermal growth factor
  • Growth factor
  • Insulin
  • Nerve growth factor
  • S-100
  • Serotonin

ASJC Scopus subject areas

  • General Neuroscience
  • Molecular Biology
  • Clinical Neurology
  • Developmental Biology


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