Whether hippocampal neurogenesis persists throughout life in the human brain is not fully resolved. Researchers of the Department of Anatomy and Cell Biology, University of Illinois at Chicago, Chicago, IL, USA demonstrate in a just published paper on Cell Stem Cell that hippocampal neurogenesis is persistent through the tenth decade of life and is detectable in patients with mild cognitive impairments and Alzheimer’s disease. In a cohort of 18 participants with a mean age of 90.6 years, Nestin +Sox2 +neural progenitor cells (NPCs) and DCX + neuroblasts and immature neurons were detected, but their numbers greatly varied between participants. Nestin + cells localize in the anterior hippocampus, and NPCs, neuroblasts, and immature neurons are evenly distributed along the anterior to posterior axis. The number of DCX +PCNA + cells is reduced in mild cognitive impairments, and higher numbers of neuroblasts are associated with better cognitive status. The number of DCX+PCNA + cells correlates with functional interactions between presynaptic SNARE proteins. Results suggest that hippocampal neurogenesis persists in the aged and diseased human brain and that it is possibly associated with cognition.

Share Button