Brain‐derived Neurotrophic Factor is a Survival Factor for Cultured Rat Cerebellar Granule Neurons and Protects them Against Glutamate‐induced Neurotoxicity

Brain‐derived Neurotrophic Factor is a Survival Factor for Cultured Rat Cerebellar Granule... We have studied the effects of different neurotrophins on the survival and proliferation of rat cerebellar granule cells in culture. These neurons express trkB and trkC, the putative neuronal receptors for brain‐derived neurotrophic factor (BDNF) and neurotrophin‐3 (NT‐3) respectively. Binding studies using iodinated BDNF and NT‐3 demonstrated that both BDNF and NT‐3 bind to the cerebellar granule neurons with a similar affinity of ˜ 2x10‐9 M. The number of receptors per granule cell was surprisingly high, ∼30x10‐4 and 2x 105 for BDNF and NT‐3, respectively. Both NT‐3 and BDNF elevated c‐fos mRNA in the granule neurons, but only BDNF up‐regulated the mRNA encoding the low‐affinity neurotrophin receptor (p75). In contrast to NT‐3, BDNF acted as a survival factor for the granule neurons. BDNF also induced sprouting of the granule neurons and significantly protected them against neurotoxicity induced by high (1 mM) glutamate concentrations. Cultured granule neurons also expressed low levels of BDNF mRNA which were increased by kainic acid, a glutamate receptor agonist. Thus, BDNF, but not NT‐3, is a survival factor for cultured cerebellar granule neurons and activation of glutamate receptor(s) up‐regulates BDNF expression in these cells. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png European Journal of Neuroscience Wiley

Brain‐derived Neurotrophic Factor is a Survival Factor for Cultured Rat Cerebellar Granule Neurons and Protects them Against Glutamate‐induced Neurotoxicity

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Publisher
Wiley
Copyright
Copyright © 1993 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0953-816X
eISSN
1460-9568
D.O.I.
10.1111/j.1460-9568.1993.tb00213.x
Publisher site
See Article on Publisher Site

Abstract

We have studied the effects of different neurotrophins on the survival and proliferation of rat cerebellar granule cells in culture. These neurons express trkB and trkC, the putative neuronal receptors for brain‐derived neurotrophic factor (BDNF) and neurotrophin‐3 (NT‐3) respectively. Binding studies using iodinated BDNF and NT‐3 demonstrated that both BDNF and NT‐3 bind to the cerebellar granule neurons with a similar affinity of ˜ 2x10‐9 M. The number of receptors per granule cell was surprisingly high, ∼30x10‐4 and 2x 105 for BDNF and NT‐3, respectively. Both NT‐3 and BDNF elevated c‐fos mRNA in the granule neurons, but only BDNF up‐regulated the mRNA encoding the low‐affinity neurotrophin receptor (p75). In contrast to NT‐3, BDNF acted as a survival factor for the granule neurons. BDNF also induced sprouting of the granule neurons and significantly protected them against neurotoxicity induced by high (1 mM) glutamate concentrations. Cultured granule neurons also expressed low levels of BDNF mRNA which were increased by kainic acid, a glutamate receptor agonist. Thus, BDNF, but not NT‐3, is a survival factor for cultured cerebellar granule neurons and activation of glutamate receptor(s) up‐regulates BDNF expression in these cells.

Journal

European Journal of NeuroscienceWiley

Published: Nov 1, 1993

References

  • Thyroid hormone and brain development
    Dussault, Dussault; Ruel, Ruel
  • Cells expressing mRNA for neurotrophins and their receptors during embryonic rat development
    Ernfors, Ernfors; Merlio, Merlio; Persson, Persson
  • Neurotrophin‐3 induced by tri‐iodothyronine in cerebellar granule cells promotes Purkinje cell differentiation
    Lindholm, Lindholm; Castren, Castren; Tsoulfas, Tsoulfas; Kolbeck, Kolbeck; Berzaghi, Berzaghi; Leingártner, Leingártner; Heisenberg, Heisenberg; Tesarollo, Tesarollo; Parada, Parada; Thoenen, Thoenen
  • Nerve growth factor regulates expression of the nerve growth factor receptor gene in adult sensory neurons
    Lindsay, Lindsay; Shooter, Shooter; Radeke, Radeke; Misko, Misko; Dechant, Dechant; Thoenen, Thoenen; Lindholm, Lindholm
  • The excitatory amino acid receptors: their classes, pharmacology and distinct properties in the function of the central nervous system
    Monaghan, Monaghan; Bridges, Bridges; Cotman, Cotman
  • Glutamate and the pathophysiology of hypoxic‐ischemic brain damage
    Rothman, Rothman; Olney, Olney

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