Human Neural Stem Cells-cortical region

Human neural stem cells (NSCs) of cortical origin are derived from the developing dorsal telencephalon, typically between gestational weeks 6–9, and can be expanded in vitro as neurospheres or adherent monolayers. Their fundamental advantage lies in the stable retention of regional identity—unlike NSCs from other CNS regions, cortical NSCs maintain a forebrain-specific transcriptional program (e.g., EMX2, PAX6) and, upon differentiation, preferentially generate glutamatergic projection neurons, calretinin‑positive interneurons, and tyrosine‑hydroxylase‑positive cells, mirroring the excitatory/inhibitory balance of the human cerebral cortex. This regionally encoded fate is preserved over multiple passages and even after xenotransplantation, ensuring reproducible and physiologically relevant outcomes. Second, they exhibit robust self‑renewal and multipotency, yielding neurons, astrocytes, and oligodendrocytes in defined ratios, while retaining a high neurogenic bias—a property that declines in adult NSCs. Third, their superior engraftment and integration in injury models (e.g., stroke, trauma) have been demonstrated: transplanted cortical NSCs migrate along white matter tracts, form functional synapses with host neurons, and improve behavioural recovery, underscoring their therapeutic potential.

Critically, human cortical NSCs offer unparalleled relevance for disease modelling. They enable the study of human‑specific corticogenesis, including the generation of outer radial glial cells—a population absent in rodents—which is essential for modelling lissencephaly, microcephaly, and autism‑related macrocephaly. Combined with CRISPR‑editing, they provide an isogenic platform for mechanistic dissection of neuropsychiatric disorders.