NPHS1 and liver dysplastic nodule: As podocyte dedifferentiation is a critical step in the progression of DN, we applied our well‐established dedifferentiation assay to study the influence of BDNF on podocyte differentiation.36 We could show that the inhibition of the TrkB receptor, which mediates for BDNF signalling, led to decreased nephrin promotor activity and therefore to increased podocyte dedifferentiation in murine glomeruli.