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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

BDNF and NT-3 regulation of trkB and trkC mRNA levels in the developing chick spinal cord.

In this study we investigated the effects of brain-derived neurotrophic factor (BDNF) and neurotrophin-3 on mRNA levels of TrkB and TrkC receptors. We used an expression system to supply developing chicks with the neurotrophic factor and then analysed the receptor mRNA levels at embryonic day 8 (E8), E10 and E15 using semi-quantitative RT-PCR. In control chicks, maximal expression levels of both receptors were observed at E10. Treatment with BDNF resulted in significant down-regulation of TrkB mRNA levels (P<0.05) at E10 but not E8 or E15. Treatment with NT-3 showed down-regulation of trkB levels at all developmental stages. TrkC mRNA levels were down-regulated at all developmental stages with NT-3 treatment and at E10 and E15 with BDNF treatment. For both receptors the down-regulation was greater in NT-3-treated chicks than those treated with BDNF. Thus, our data indicate that neurotrophin receptor mRNA levels in the spinal cord are regulated by neurotrophic factors during embryonic development.[1]


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