Journal
STEM CELL REVIEWS AND REPORTS
Volume 18, Issue 8, Pages 2852-2871Publisher
SPRINGER
DOI: 10.1007/s12015-022-10423-y
Keywords
Neurogenesis; Neural stem cells; Cell differentiation; Sonic hedgehog; Wnt wingless-related; Bone morphogenetic proteins; Neurotrophins, Notch
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Neurogenesis is the process of forming new neurons from stem cells. While it was previously believed that neurons only multiplied during development, it has been discovered that neural stem cells can generate new neurons and glial cells in the mature brain. Certain regions, such as the subgranular and subventricular zones, retain the ability to undergo neurogenesis. This has important implications for the treatment of brain damage and neurodegenerative diseases.
Neurogenesis is a biological process characterized by new neurons formation from stem cells. For decades, it was believed that neurons only multiplied during development and in the postnatal period but the discovery of neural stem cells (NSCs) in mature brain promoted a revolution in neuroscience field. In mammals, neurogenesis consists of migration, differentiation, maturation, as well as functional integration of newborn cells into the pre-existing neuronal circuit. Actually, NSC density drops significantly after the first stages of development, however in specific places in the brain, called neurogenic niches, some of these cells retain their ability to generate new neurons and glial cells in adulthood. The subgranular (SGZ), and the subventricular zones (SVZ) are examples of regions where the neurogenesis process occurs in the mature brain. There, the potential of NSCs to produce new neurons has been explored by new advanced methodologies and in neuroscience for the treatment of brain damage and/or degeneration. Based on that, this review highlights endogenous factors and drugs capable of stimulating neurogenesis, as well as the perspectives for the use of NSCs for neurological and neurodegenerative diseases.
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