Abstract
Presence of neural stem cells in adult mammalian brains, including human, has been clearly demonstrated by several studies. The functional significance of adult neurogenesis is slowly emerging as new data indicate the sensitivity of this event to several “every day” external stimuli such as physical activity, learning, enriched environment, aging, stress and drugs. In addition, neurogenesis appears to be instrumental for task performance involving complex cognitive functions.
Despite the growing body of evidence on the functional significance of NSC and despite the bulk of data concerning the molecular and cellular properties of NSCs and their niches, several critical questions are still open.
In this work we review the literature describing i) old and new sites where NSC niche have been found in the CNS; ii) the intrinsic factors regulating the NSC potential; iii) the extrinsic factors that form the niche microenvironment. Moreover, we analyse NSC niche activation in iv) physiological and v) pathological conditions.
Given the not static nature of NSCs that continuously change phenotype in response to environmental clues, a unique “identity card” for NSC identification is still lacking. Moreover, the multiple location of NSC niches that increase in diseases, leaves open the question of whether and how these structures communicate throughout long distance. We propose a model where all the NSC niches in the CNS may be connected in a functional network using the threads of the meningeal net as tracks.
Keywords: Neural stem cells, neuroblast, nestin, neurogenesis, neurotrophic factors, stem cell niches, meninges, neuroepithelial cells (NEPs), Bone morphogenic Proteins [BMPs), neuroectoderm
Current Pharmaceutical Design
Title:Neural Stem Cell Niches in Health and Diseases
Volume: 18 Issue: 13
Author(s): Ilaria Decimo, Francesco Bifari, Mauro Krampera, Guido Fumagalli
Affiliation:
Keywords: Neural stem cells, neuroblast, nestin, neurogenesis, neurotrophic factors, stem cell niches, meninges, neuroepithelial cells (NEPs), Bone morphogenic Proteins [BMPs), neuroectoderm
Abstract: Presence of neural stem cells in adult mammalian brains, including human, has been clearly demonstrated by several studies. The functional significance of adult neurogenesis is slowly emerging as new data indicate the sensitivity of this event to several “every day” external stimuli such as physical activity, learning, enriched environment, aging, stress and drugs. In addition, neurogenesis appears to be instrumental for task performance involving complex cognitive functions.
Despite the growing body of evidence on the functional significance of NSC and despite the bulk of data concerning the molecular and cellular properties of NSCs and their niches, several critical questions are still open.
In this work we review the literature describing i) old and new sites where NSC niche have been found in the CNS; ii) the intrinsic factors regulating the NSC potential; iii) the extrinsic factors that form the niche microenvironment. Moreover, we analyse NSC niche activation in iv) physiological and v) pathological conditions.
Given the not static nature of NSCs that continuously change phenotype in response to environmental clues, a unique “identity card” for NSC identification is still lacking. Moreover, the multiple location of NSC niches that increase in diseases, leaves open the question of whether and how these structures communicate throughout long distance. We propose a model where all the NSC niches in the CNS may be connected in a functional network using the threads of the meningeal net as tracks.
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Ilaria Decimo, Francesco Bifari, Mauro Krampera, Guido Fumagalli , Neural Stem Cell Niches in Health and Diseases , Current Pharmaceutical Design 2012; 18 (13) . https://dx.doi.org/10.2174/138161212799859611
DOI https://dx.doi.org/10.2174/138161212799859611 |
Print ISSN 1381-6128 |
Publisher Name Bentham Science Publisher |
Online ISSN 1873-4286 |
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