LMNB2 and Alzheimer disease: One population expresses nucleoplasmic lamin B2, a sign of active transcription and abortive cell cycle that leads to neuronal death [31,101,102,103,104], and the population of AD neurons, characterized by an anomalous lamin A expression [28,29,30,105], which stops the cell cycle, thus protecting the nucleus and generating a new cytoskeleton [106,107,108].