FGF13 and hereditary spastic paraplegia: However, this list also contains numerous other potentially interesting candidates, including FGF12, a regulator of NFκB signaling in neurons [106]; FGF13, a microtubule stabilizing protein regulating neuronal polarization [107]; MOAP1, a modulator of apoptosis [108]; and REEP1, a gene involved in endoplasmic reticulum maintenance that is mutated in hereditary spastic paraplegia [109], among others.