NGF neurotrophin can improve remyelination by promoting myelin repair in animal models of neuro-degenerative diseases (Althaus 2004), and has been shown to be critical for survival; the axonal growth of neurons also affects the regulation of proliferation, differentiation, neuro-transmission, and plasticity (Levi-Montalcini 2004). The gene discussed is BDNF; the disease is Neurodegeneration.