Jan 22, 2005

Effects of brain-derived neurotrophic factor (BDNF) on glial cells and serotonergic neurones during development

Journal of Neurochemistry
Susann DjalaliGudrun Ahnert-Hilger

Abstract

Serotonergic neurones are among the first to develop in the central nervous system. Their survival and maturation is promoted by a variety of factors, including serotonin itself, brain-derived neurotrophic factor (BDNF) and S100beta, an astrocyte-specific Ca(2+) binding protein. Here, we used BDNF-deficient mice and cell cultures of embryonic raphe neurones to determine whether or not BDNF effects on developing serotonergic raphe neurones are influenced by its action on glial cells. In BDNF-/- mice, the number of serotonin-immunoreactive neuronal somata, the amount of the serotonin transporter, the serotonin content in the striatum and the hippocampus, and the content of 5-hydroxyindoleacetic acid in all brain regions analysed were increased. By contrast, reduced immunoreactivity was found for myelin basic protein (MBP) in all brain areas including the raphe and its target region, the hippocampus. Exogenously applied BDNF increased the number of MBP-immunopositive cells in the respective culture systems. The raphe area displayed selectively reduced immunoreactivity for S100beta. Accordingly, S100beta was increased in primary cultures of pure astrocytes by exogenous BDNF. In glia-free neuronal cultures prepared from the embryoni...Continue Reading

  • References31
  • Citations51

Mentioned in this Paper

Embryo
Immunoreactivity
Neostriatum
Serotonin Measurement
Neurons
Serotonin
Brain
Astrocytes
Recombinant Brain-Derived Growth Factors
Cell Culture Techniques

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