Aβ42 Peptide Promotes Proliferation and Gliogenesis in Human Neural Stem Cells
| Autor: | Eva Cano, Isabel Liste, Adela Bernabeu-Zornoza, Charlotte Palmer, Miguel Calero, Alberto Zambrano, Alberto Martínez-Serrano, Raquel Coronel |
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| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Programmed cell death Pyridines Neurogenesis Cell Neuroscience (miscellaneous) Apoptosis Cell fate determination Biology Cell Line 03 medical and health sciences Cellular and Molecular Neuroscience 0302 clinical medicine Neural Stem Cells medicine Humans Cell Lineage Cell Proliferation Gliogenesis Amyloid beta-Peptides Cell growth Neurotoxicity Cell Differentiation medicine.disease Peptide Fragments Neural stem cell Cell biology Pyrimidines 030104 developmental biology medicine.anatomical_structure Neurology Cell culture Neuroglia 030217 neurology & neurosurgery Signal Transduction |
| Zdroj: | Molecular Neurobiology. 56:4023-4036 |
| ISSN: | 1559-1182 0893-7648 |
| Popis: | Amyloid-β 42 [Aβ1–42 (Aβ42)] is one of the main Aβ peptide isoforms found in amyloid plaques of brains with Alzheimer’s disease (AD). Although Aβ42 is associated with neurotoxicity, it might mediate several normal physiological processes during embryonic brain development and in the adult brain. However, due to the controversy that exists in the field, relatively little is known about its physiological function. In the present work, we have analyzed the effects of different concentrations of monomeric Aβ42 on cell death, proliferation, and cell fate specification of human neural stem cells (hNSCs), specifically the hNS1 cell line, undergoing differentiation. Our results demonstrate that at higher concentrations (1 μM), Aβ42 increases apoptotic cell death and DNA damage, indicating that prolonged exposure of hNS1 cells to higher concentrations of Aβ42 is neurotoxic. However, at lower concentrations, Aβ42 significantly promotes cell proliferation and glial cell specification of hNS1 cells by increasing the pool of proliferating glial precursors, without affecting neuronal differentiation, in a concentration-dependent manner. At the molecular level, these effects could be mediated, at least in part, by GSK3β, whose expression is increased by treatment with Aβ42 and whose inhibition prevents the glial specification induced by Aβ42. Since the cellular and molecular effects are known to appear decades before the first clinical symptoms, these types of studies are important in discovering the underlying pathophysiological processes involved in the development of AD. This knowledge could then be used in diagnosing the disease at early stages and be applied to the development of new treatment options. |
| Databáze: | OpenAIRE |
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