NEAT1 and posterior cortical atrophy: To further confirm that this change was mediated by the transfer of NEAT1 by exosomes, we knocked down Rab27A in MDA‐PCa‐2b cells, which regulates exosome secretion, and then implanted these MDA‐PCa‐2b cells into the skulls of immunodeficient mice (Figure S3) to inhibit the secretion of exosomes.33