What are the molecular mechanisms regulating neuronal sensitivity to BDNF? (360G-Wellcome-211495_Z_18_Z)

Neurotrophins and their receptors play a key role in the maintenance and remodelling of the nervous system, and defects in trophic signalling are associated with mental illness as well as neurodegeneration. To date, the cellular mechanisms regulating neurotrophin receptor bioavailability are not fully understood. Here we focus on BDNF and its receptor, TrkB, which are widely expressed throughout the central nervous system. This project will investigate the role of two novel potential TrkB regulators that recently emerged from our screens. Candidates will be expressed in HEK-TrkB cells and primary cortical mouse neurons, and (i) TrkB receptor expression levels and (ii) downstream signalling events will be investigated using both Western blotting and immunofluorescence techniques. These experiments will address whether the candidates modulate TrkB availability and activity. A better understanding of the cellular mechanisms underlying TrkB regulation may highlight potential therapeutic targets to counteract TrkB degradation and restore sensitivity of vulnerable cells to the beneficial actions of BDNF.