AI Insight
Researchers have successfully identified and isolated two distinct types of neural stem cells from postnatal human brains that continue to produce new neurons after birth. Using advanced sorting techniques, they found one population (NINO) that primarily generates interneurons and oligodendrocytes, and another (NAC) that mainly produces astrocytes. Analysis across human lifespans revealed that while neural stem cell frequency drops rapidly during the first twenty years, these cells persist at stable levels into old age, even in 90-year-old donors.
Why it matters
This work establishes methods to study living human neural stem cells and demonstrates their persistence throughout life, which could inform therapeutic approaches for neurodegenerative diseases, brain injuries, and age-related cognitive decline. Understanding how these cells function may enable future regenerative medicine strategies to replace damaged neurons or support brain repair.
⚠️ Preprint – Noch nicht peer-reviewed
Dieser Artikel wurde noch nicht von unabhängigen Experten begutachtet. Die Ergebnisse sind vorläufig und sollten mit Vorsicht interpretiert werden.
While it was once thought that neurogenesis is complete by birth, it is now apparent that the human brain continues to generate new neurons postnatally, at least into childhood. While much attention has been focused on postnatally-born neurons, their presumed progenitor — the postnatal neural stem cell (NSC) — remains poorly characterized. Using index sorting, we identify and prospectively isolate two subsets of NSCs from the postnatal human brain, and describe their differentiation dynamics using clonal barcoding and in vivo xenotransplantation. We demonstrate an A2B5+EGFR+ population biased towards interneuron and oligodendrocyte fates (NINO), and an A2B5-EGFRhi population biased towards an astrocyte fate (NAC). Profiling of human brains across lifespan shows that the frequency of NSCs declined exponentially across the first two decades of life, but stabilized thereafter, still present in the brains of donors as old as 90 years. Our study provides a framework for the functional study of postnatal human NSCs and their potential roles in development, aging, and disease.