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Neurosphere-derived multipotent precursors promote neuroprotection by an immunomodulatory mechanism
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Neurosphere-derived multipotent precursors promote neuroprotection by an immunomodulatory mechanism
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Journal Article
Neurosphere-derived multipotent precursors promote neuroprotection by an immunomodulatory mechanism
2005
Overview
Stem cells steady the nerves
The potential for stem-cell therapy in neurological disorders characterized by chronic inflammation, for example multiple sclerosis, brain tumours and ischaemic stroke, seems limited. Recurring inflammation is likely to destroy both resident and transplanted cells. But in a mouse model of chronic central nervous system inflammation, neural multipotent (stem) precursor cells have been found to promote neuroprotection by maintaining undifferentiated features and exerting unexpected immune-like functions. The undifferentiated cells survive repeated episodes of inflammation, suggesting that they could after all have therapeutic potential in these disorders.
In degenerative disorders of the central nervous system (CNS), transplantation of neural multipotent (stem) precursor cells (NPCs) is aimed at replacing damaged neural cells
1
,
2
. Here we show that in CNS inflammation, NPCs are able to promote neuroprotection by maintaining undifferentiated features and exerting unexpected immune-like functions. In a mouse model of chronic CNS inflammation, systemically injected adult syngeneic NPCs use constitutively activated integrins and functional chemokine receptors to selectively enter the inflamed CNS. These undifferentiated cells survive repeated episodes of CNS inflammation by accumulating within perivascular areas where reactive astrocytes, inflamed endothelial cells and encephalitogenic T cells produce neurogenic and gliogenic regulators. In perivascular CNS areas, surviving adult NPCs induce apoptosis of blood-borne CNS-infiltrating encephalitogenic T cells, thus protecting against chronic neural tissue loss as well as disease-related disability. These results indicate that undifferentiated adult NPCs have relevant therapeutic potential in chronic inflammatory CNS disorders because they display immune-like functions that promote long-lasting neuroprotection.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
/ Brain Tissue Transplantation
/ Central Nervous System - blood supply
/ Central Nervous System - immunology
/ Central Nervous System - pathology
/ Encephalomyelitis, Autoimmune, Experimental - immunology
/ Encephalomyelitis, Autoimmune, Experimental - pathology
/ Encephalomyelitis, Autoimmune, Experimental - therapy
/ Humanities and Social Sciences
/ Integrin alpha4beta1 - metabolism
/ letter
/ Mice
/ Multipotent Stem Cells - cytology
/ Multipotent Stem Cells - immunology
/ Multipotent Stem Cells - physiology
/ Multipotent Stem Cells - transplantation
/ Neuroprotective Agents - metabolism
/ Receptors, Chemokine - metabolism
/ Science
