BCL2L11 and Parkinson disease: MicroRNA-124 (miR-124) is highly expressed in the brain, with an abundance that is (more than 100 times) higher than that in other organs, and it plays a critical role in PD, which regulates apoptosis and autophagy in the MPTP model of PD by targeting Bim and loads nanoparticles to enhance brain repair in PD [16–18].